diff options
Diffstat (limited to 'core/src/fxge/fx_freetype/fxft2.5.01/src/truetype/ttinterp.c')
-rw-r--r-- | core/src/fxge/fx_freetype/fxft2.5.01/src/truetype/ttinterp.c | 8952 |
1 files changed, 0 insertions, 8952 deletions
diff --git a/core/src/fxge/fx_freetype/fxft2.5.01/src/truetype/ttinterp.c b/core/src/fxge/fx_freetype/fxft2.5.01/src/truetype/ttinterp.c deleted file mode 100644 index b7d2b62b3d..0000000000 --- a/core/src/fxge/fx_freetype/fxft2.5.01/src/truetype/ttinterp.c +++ /dev/null @@ -1,8952 +0,0 @@ -/***************************************************************************/ -/* */ -/* ttinterp.c */ -/* */ -/* TrueType bytecode interpreter (body). */ -/* */ -/* Copyright 1996-2013 */ -/* by David Turner, Robert Wilhelm, and Werner Lemberg. */ -/* */ -/* This file is part of the FreeType project, and may only be used, */ -/* modified, and distributed under the terms of the FreeType project */ -/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ -/* this file you indicate that you have read the license and */ -/* understand and accept it fully. */ -/* */ -/***************************************************************************/ - - -/* Greg Hitchcock from Microsoft has helped a lot in resolving unclear */ -/* issues; many thanks! */ - - -#include "../../include/ft2build.h" -#include "../../include/freetype/internal/ftdebug.h" -#include "../../include/freetype/internal/ftcalc.h" -#include "../../include/freetype/fttrigon.h" -#include "../../include/freetype/ftsystem.h" -#include "../../include/freetype/ftttdrv.h" - -#include "ttinterp.h" -#include "tterrors.h" -#include "ttsubpix.h" - - -#ifdef TT_USE_BYTECODE_INTERPRETER - - - /*************************************************************************/ - /* */ - /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ - /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ - /* messages during execution. */ - /* */ -#undef FT_COMPONENT -#define FT_COMPONENT trace_ttinterp - - /*************************************************************************/ - /* */ - /* In order to detect infinite loops in the code, we set up a counter */ - /* within the run loop. A single stroke of interpretation is now */ - /* limited to a maximum number of opcodes defined below. */ - /* */ -#define MAX_RUNNABLE_OPCODES 1000000L - - - /*************************************************************************/ - /* */ - /* There are two kinds of implementations: */ - /* */ - /* a. static implementation */ - /* */ - /* The current execution context is a static variable, which fields */ - /* are accessed directly by the interpreter during execution. The */ - /* context is named `cur'. */ - /* */ - /* This version is non-reentrant, of course. */ - /* */ - /* b. indirect implementation */ - /* */ - /* The current execution context is passed to _each_ function as its */ - /* first argument, and each field is thus accessed indirectly. */ - /* */ - /* This version is fully re-entrant. */ - /* */ - /* The idea is that an indirect implementation may be slower to execute */ - /* on low-end processors that are used in some systems (like 386s or */ - /* even 486s). */ - /* */ - /* As a consequence, the indirect implementation is now the default, as */ - /* its performance costs can be considered negligible in our context. */ - /* Note, however, that we kept the same source with macros because: */ - /* */ - /* - The code is kept very close in design to the Pascal code used for */ - /* development. */ - /* */ - /* - It's much more readable that way! */ - /* */ - /* - It's still open to experimentation and tuning. */ - /* */ - /*************************************************************************/ - - -#ifndef TT_CONFIG_OPTION_STATIC_INTERPRETER /* indirect implementation */ - -#define CUR (*exc) /* see ttobjs.h */ - - /*************************************************************************/ - /* */ - /* This macro is used whenever `exec' is unused in a function, to avoid */ - /* stupid warnings from pedantic compilers. */ - /* */ -#define FT_UNUSED_EXEC FT_UNUSED( exc ) - -#else /* static implementation */ - -#define CUR cur - -#define FT_UNUSED_EXEC int __dummy = __dummy - - static - TT_ExecContextRec cur; /* static exec. context variable */ - - /* apparently, we have a _lot_ of direct indexing when accessing */ - /* the static `cur', which makes the code bigger (due to all the */ - /* four bytes addresses). */ - -#endif /* TT_CONFIG_OPTION_STATIC_INTERPRETER */ - - - /*************************************************************************/ - /* */ - /* The instruction argument stack. */ - /* */ -#define INS_ARG EXEC_OP_ FT_Long* args /* see ttobjs.h for EXEC_OP_ */ - - - /*************************************************************************/ - /* */ - /* This macro is used whenever `args' is unused in a function, to avoid */ - /* stupid warnings from pedantic compilers. */ - /* */ -#define FT_UNUSED_ARG FT_UNUSED_EXEC; FT_UNUSED( args ) - - -#define SUBPIXEL_HINTING \ - ( ((TT_Driver)FT_FACE_DRIVER( CUR.face ))->interpreter_version == \ - TT_INTERPRETER_VERSION_38 ) - - - /*************************************************************************/ - /* */ - /* The following macros hide the use of EXEC_ARG and EXEC_ARG_ to */ - /* increase readability of the code. */ - /* */ - /*************************************************************************/ - - -#define SKIP_Code() \ - SkipCode( EXEC_ARG ) - -#define GET_ShortIns() \ - GetShortIns( EXEC_ARG ) - -#define NORMalize( x, y, v ) \ - Normalize( EXEC_ARG_ x, y, v ) - -#define SET_SuperRound( scale, flags ) \ - SetSuperRound( EXEC_ARG_ scale, flags ) - -#define ROUND_None( d, c ) \ - Round_None( EXEC_ARG_ d, c ) - -#define INS_Goto_CodeRange( range, ip ) \ - Ins_Goto_CodeRange( EXEC_ARG_ range, ip ) - -#define CUR_Func_move( z, p, d ) \ - CUR.func_move( EXEC_ARG_ z, p, d ) - -#define CUR_Func_move_orig( z, p, d ) \ - CUR.func_move_orig( EXEC_ARG_ z, p, d ) - -#define CUR_Func_round( d, c ) \ - CUR.func_round( EXEC_ARG_ d, c ) - -#define CUR_Func_read_cvt( index ) \ - CUR.func_read_cvt( EXEC_ARG_ index ) - -#define CUR_Func_write_cvt( index, val ) \ - CUR.func_write_cvt( EXEC_ARG_ index, val ) - -#define CUR_Func_move_cvt( index, val ) \ - CUR.func_move_cvt( EXEC_ARG_ index, val ) - -#define CURRENT_Ratio() \ - Current_Ratio( EXEC_ARG ) - -#define CURRENT_Ppem() \ - Current_Ppem( EXEC_ARG ) - -#define CUR_Ppem() \ - Cur_PPEM( EXEC_ARG ) - -#define INS_SxVTL( a, b, c, d ) \ - Ins_SxVTL( EXEC_ARG_ a, b, c, d ) - -#define COMPUTE_Funcs() \ - Compute_Funcs( EXEC_ARG ) - -#define COMPUTE_Round( a ) \ - Compute_Round( EXEC_ARG_ a ) - -#define COMPUTE_Point_Displacement( a, b, c, d ) \ - Compute_Point_Displacement( EXEC_ARG_ a, b, c, d ) - -#define MOVE_Zp2_Point( a, b, c, t ) \ - Move_Zp2_Point( EXEC_ARG_ a, b, c, t ) - - -#define CUR_Func_project( v1, v2 ) \ - CUR.func_project( EXEC_ARG_ (v1)->x - (v2)->x, (v1)->y - (v2)->y ) - -#define CUR_Func_dualproj( v1, v2 ) \ - CUR.func_dualproj( EXEC_ARG_ (v1)->x - (v2)->x, (v1)->y - (v2)->y ) - -#define CUR_fast_project( v ) \ - CUR.func_project( EXEC_ARG_ (v)->x, (v)->y ) - -#define CUR_fast_dualproj( v ) \ - CUR.func_dualproj( EXEC_ARG_ (v)->x, (v)->y ) - - - /*************************************************************************/ - /* */ - /* Instruction dispatch function, as used by the interpreter. */ - /* */ - typedef void (*TInstruction_Function)( INS_ARG ); - - - /*************************************************************************/ - /* */ - /* Two simple bounds-checking macros. */ - /* */ -#define BOUNDS( x, n ) ( (FT_UInt)(x) >= (FT_UInt)(n) ) -#define BOUNDSL( x, n ) ( (FT_ULong)(x) >= (FT_ULong)(n) ) - - /*************************************************************************/ - /* */ - /* This macro computes (a*2^14)/b and complements TT_MulFix14. */ - /* */ -#define TT_DivFix14( a, b ) \ - FT_DivFix( a, (b) << 2 ) - - -#undef SUCCESS -#define SUCCESS 0 - -#undef FAILURE -#define FAILURE 1 - -#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING -#define GUESS_VECTOR( V ) \ - if ( CUR.face->unpatented_hinting ) \ - { \ - CUR.GS.V.x = (FT_F2Dot14)( CUR.GS.both_x_axis ? 0x4000 : 0 ); \ - CUR.GS.V.y = (FT_F2Dot14)( CUR.GS.both_x_axis ? 0 : 0x4000 ); \ - } -#else -#define GUESS_VECTOR( V ) -#endif - - /*************************************************************************/ - /* */ - /* CODERANGE FUNCTIONS */ - /* */ - /*************************************************************************/ - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* TT_Goto_CodeRange */ - /* */ - /* <Description> */ - /* Switches to a new code range (updates the code related elements in */ - /* `exec', and `IP'). */ - /* */ - /* <Input> */ - /* range :: The new execution code range. */ - /* */ - /* IP :: The new IP in the new code range. */ - /* */ - /* <InOut> */ - /* exec :: The target execution context. */ - /* */ - /* <Return> */ - /* FreeType error code. 0 means success. */ - /* */ - FT_LOCAL_DEF( FT_Error ) - TT_Goto_CodeRange( TT_ExecContext exec, - FT_Int range, - FT_Long IP ) - { - TT_CodeRange* coderange; - - - FT_ASSERT( range >= 1 && range <= 3 ); - - coderange = &exec->codeRangeTable[range - 1]; - - FT_ASSERT( coderange->base != NULL ); - - /* NOTE: Because the last instruction of a program may be a CALL */ - /* which will return to the first byte *after* the code */ - /* range, we test for IP <= Size instead of IP < Size. */ - /* */ - FT_ASSERT( (FT_ULong)IP <= coderange->size ); - - exec->code = coderange->base; - exec->codeSize = coderange->size; - exec->IP = IP; - exec->curRange = range; - - return FT_Err_Ok; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* TT_Set_CodeRange */ - /* */ - /* <Description> */ - /* Sets a code range. */ - /* */ - /* <Input> */ - /* range :: The code range index. */ - /* */ - /* base :: The new code base. */ - /* */ - /* length :: The range size in bytes. */ - /* */ - /* <InOut> */ - /* exec :: The target execution context. */ - /* */ - /* <Return> */ - /* FreeType error code. 0 means success. */ - /* */ - FT_LOCAL_DEF( FT_Error ) - TT_Set_CodeRange( TT_ExecContext exec, - FT_Int range, - void* base, - FT_Long length ) - { - FT_ASSERT( range >= 1 && range <= 3 ); - - exec->codeRangeTable[range - 1].base = (FT_Byte*)base; - exec->codeRangeTable[range - 1].size = length; - - return FT_Err_Ok; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* TT_Clear_CodeRange */ - /* */ - /* <Description> */ - /* Clears a code range. */ - /* */ - /* <Input> */ - /* range :: The code range index. */ - /* */ - /* <InOut> */ - /* exec :: The target execution context. */ - /* */ - /* <Return> */ - /* FreeType error code. 0 means success. */ - /* */ - /* <Note> */ - /* Does not set the Error variable. */ - /* */ - FT_LOCAL_DEF( FT_Error ) - TT_Clear_CodeRange( TT_ExecContext exec, - FT_Int range ) - { - FT_ASSERT( range >= 1 && range <= 3 ); - - exec->codeRangeTable[range - 1].base = NULL; - exec->codeRangeTable[range - 1].size = 0; - - return FT_Err_Ok; - } - - - /*************************************************************************/ - /* */ - /* EXECUTION CONTEXT ROUTINES */ - /* */ - /*************************************************************************/ - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* TT_Done_Context */ - /* */ - /* <Description> */ - /* Destroys a given context. */ - /* */ - /* <Input> */ - /* exec :: A handle to the target execution context. */ - /* */ - /* memory :: A handle to the parent memory object. */ - /* */ - /* <Return> */ - /* FreeType error code. 0 means success. */ - /* */ - /* <Note> */ - /* Only the glyph loader and debugger should call this function. */ - /* */ - FT_LOCAL_DEF( FT_Error ) - TT_Done_Context( TT_ExecContext exec ) - { - FT_Memory memory = exec->memory; - - - /* points zone */ - exec->maxPoints = 0; - exec->maxContours = 0; - - /* free stack */ - FT_FREE( exec->stack ); - exec->stackSize = 0; - - /* free call stack */ - FT_FREE( exec->callStack ); - exec->callSize = 0; - exec->callTop = 0; - - /* free glyph code range */ - FT_FREE( exec->glyphIns ); - exec->glyphSize = 0; - - exec->size = NULL; - exec->face = NULL; - - FT_FREE( exec ); - - return FT_Err_Ok; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Init_Context */ - /* */ - /* <Description> */ - /* Initializes a context object. */ - /* */ - /* <Input> */ - /* memory :: A handle to the parent memory object. */ - /* */ - /* <InOut> */ - /* exec :: A handle to the target execution context. */ - /* */ - /* <Return> */ - /* FreeType error code. 0 means success. */ - /* */ - static FT_Error - Init_Context( TT_ExecContext exec, - FT_Memory memory ) - { - FT_Error error; - - - FT_TRACE1(( "Init_Context: new object at 0x%08p\n", exec )); - - exec->memory = memory; - exec->callSize = 32; - - if ( FT_NEW_ARRAY( exec->callStack, exec->callSize ) ) - goto Fail_Memory; - - /* all values in the context are set to 0 already, but this is */ - /* here as a remainder */ - exec->maxPoints = 0; - exec->maxContours = 0; - - exec->stackSize = 0; - exec->glyphSize = 0; - - exec->stack = NULL; - exec->glyphIns = NULL; - - exec->face = NULL; - exec->size = NULL; - - return FT_Err_Ok; - - Fail_Memory: - FT_ERROR(( "Init_Context: not enough memory for %p\n", exec )); - TT_Done_Context( exec ); - - return error; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Update_Max */ - /* */ - /* <Description> */ - /* Checks the size of a buffer and reallocates it if necessary. */ - /* */ - /* <Input> */ - /* memory :: A handle to the parent memory object. */ - /* */ - /* multiplier :: The size in bytes of each element in the buffer. */ - /* */ - /* new_max :: The new capacity (size) of the buffer. */ - /* */ - /* <InOut> */ - /* size :: The address of the buffer's current size expressed */ - /* in elements. */ - /* */ - /* buff :: The address of the buffer base pointer. */ - /* */ - /* <Return> */ - /* FreeType error code. 0 means success. */ - /* */ - FT_LOCAL_DEF( FT_Error ) - Update_Max( FT_Memory memory, - FT_ULong* size, - FT_Long multiplier, - void* _pbuff, - FT_ULong new_max ) - { - FT_Error error; - void** pbuff = (void**)_pbuff; - - - if ( *size < new_max ) - { - if ( FT_REALLOC( *pbuff, *size * multiplier, new_max * multiplier ) ) - return error; - *size = new_max; - } - - return FT_Err_Ok; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* TT_Load_Context */ - /* */ - /* <Description> */ - /* Prepare an execution context for glyph hinting. */ - /* */ - /* <Input> */ - /* face :: A handle to the source face object. */ - /* */ - /* size :: A handle to the source size object. */ - /* */ - /* <InOut> */ - /* exec :: A handle to the target execution context. */ - /* */ - /* <Return> */ - /* FreeType error code. 0 means success. */ - /* */ - /* <Note> */ - /* Only the glyph loader and debugger should call this function. */ - /* */ - FT_LOCAL_DEF( FT_Error ) - TT_Load_Context( TT_ExecContext exec, - TT_Face face, - TT_Size size ) - { - FT_Int i; - FT_ULong tmp; - TT_MaxProfile* maxp; - FT_Error error; - - - exec->face = face; - maxp = &face->max_profile; - exec->size = size; - - if ( size ) - { - exec->numFDefs = size->num_function_defs; - exec->maxFDefs = size->max_function_defs; - exec->numIDefs = size->num_instruction_defs; - exec->maxIDefs = size->max_instruction_defs; - exec->FDefs = size->function_defs; - exec->IDefs = size->instruction_defs; - exec->tt_metrics = size->ttmetrics; - exec->metrics = size->metrics; - - exec->maxFunc = size->max_func; - exec->maxIns = size->max_ins; - - for ( i = 0; i < TT_MAX_CODE_RANGES; i++ ) - exec->codeRangeTable[i] = size->codeRangeTable[i]; - - /* set graphics state */ - exec->GS = size->GS; - - exec->cvtSize = size->cvt_size; - exec->cvt = size->cvt; - - exec->storeSize = size->storage_size; - exec->storage = size->storage; - - exec->twilight = size->twilight; - - /* In case of multi-threading it can happen that the old size object */ - /* no longer exists, thus we must clear all glyph zone references. */ - ft_memset( &exec->zp0, 0, sizeof ( exec->zp0 ) ); - exec->zp1 = exec->zp0; - exec->zp2 = exec->zp0; - } - - /* XXX: We reserve a little more elements on the stack to deal safely */ - /* with broken fonts like arialbs, courbs, timesbs, etc. */ - tmp = exec->stackSize; - error = Update_Max( exec->memory, - &tmp, - sizeof ( FT_F26Dot6 ), - (void*)&exec->stack, - maxp->maxStackElements + 32 ); - exec->stackSize = (FT_UInt)tmp; - if ( error ) - return error; - - tmp = exec->glyphSize; - error = Update_Max( exec->memory, - &tmp, - sizeof ( FT_Byte ), - (void*)&exec->glyphIns, - maxp->maxSizeOfInstructions ); - exec->glyphSize = (FT_UShort)tmp; - if ( error ) - return error; - - exec->pts.n_points = 0; - exec->pts.n_contours = 0; - - exec->zp1 = exec->pts; - exec->zp2 = exec->pts; - exec->zp0 = exec->pts; - - exec->instruction_trap = FALSE; - - return FT_Err_Ok; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* TT_Save_Context */ - /* */ - /* <Description> */ - /* Saves the code ranges in a `size' object. */ - /* */ - /* <Input> */ - /* exec :: A handle to the source execution context. */ - /* */ - /* <InOut> */ - /* size :: A handle to the target size object. */ - /* */ - /* <Return> */ - /* FreeType error code. 0 means success. */ - /* */ - /* <Note> */ - /* Only the glyph loader and debugger should call this function. */ - /* */ - FT_LOCAL_DEF( FT_Error ) - TT_Save_Context( TT_ExecContext exec, - TT_Size size ) - { - FT_Int i; - - - /* XXX: Will probably disappear soon with all the code range */ - /* management, which is now rather obsolete. */ - /* */ - size->num_function_defs = exec->numFDefs; - size->num_instruction_defs = exec->numIDefs; - - size->max_func = exec->maxFunc; - size->max_ins = exec->maxIns; - - for ( i = 0; i < TT_MAX_CODE_RANGES; i++ ) - size->codeRangeTable[i] = exec->codeRangeTable[i]; - - return FT_Err_Ok; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* TT_Run_Context */ - /* */ - /* <Description> */ - /* Executes one or more instructions in the execution context. */ - /* */ - /* <Input> */ - /* debug :: A Boolean flag. If set, the function sets some internal */ - /* variables and returns immediately, otherwise TT_RunIns() */ - /* is called. */ - /* */ - /* This is commented out currently. */ - /* */ - /* <Input> */ - /* exec :: A handle to the target execution context. */ - /* */ - /* <Return> */ - /* TrueType error code. 0 means success. */ - /* */ - /* <Note> */ - /* Only the glyph loader and debugger should call this function. */ - /* */ - FT_LOCAL_DEF( FT_Error ) - TT_Run_Context( TT_ExecContext exec, - FT_Bool debug ) - { - FT_Error error; - - - if ( ( error = TT_Goto_CodeRange( exec, tt_coderange_glyph, 0 ) ) - != FT_Err_Ok ) - return error; - - exec->zp0 = exec->pts; - exec->zp1 = exec->pts; - exec->zp2 = exec->pts; - - exec->GS.gep0 = 1; - exec->GS.gep1 = 1; - exec->GS.gep2 = 1; - - exec->GS.projVector.x = 0x4000; - exec->GS.projVector.y = 0x0000; - - exec->GS.freeVector = exec->GS.projVector; - exec->GS.dualVector = exec->GS.projVector; - -#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING - exec->GS.both_x_axis = TRUE; -#endif - - exec->GS.round_state = 1; - exec->GS.loop = 1; - - /* some glyphs leave something on the stack. so we clean it */ - /* before a new execution. */ - exec->top = 0; - exec->callTop = 0; - -#if 1 - FT_UNUSED( debug ); - - return exec->face->interpreter( exec ); -#else - if ( !debug ) - return TT_RunIns( exec ); - else - return FT_Err_Ok; -#endif - } - - - /* The default value for `scan_control' is documented as FALSE in the */ - /* TrueType specification. This is confusing since it implies a */ - /* Boolean value. However, this is not the case, thus both the */ - /* default values of our `scan_type' and `scan_control' fields (which */ - /* the documentation's `scan_control' variable is split into) are */ - /* zero. */ - - const TT_GraphicsState tt_default_graphics_state = - { - 0, 0, 0, - { 0x4000, 0 }, - { 0x4000, 0 }, - { 0x4000, 0 }, - -#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING - TRUE, -#endif - - 1, 64, 1, - TRUE, 68, 0, 0, 9, 3, - 0, FALSE, 0, 1, 1, 1 - }; - - - /* documentation is in ttinterp.h */ - - FT_EXPORT_DEF( TT_ExecContext ) - TT_New_Context( TT_Driver driver ) - { - TT_ExecContext exec; - FT_Memory memory; - - - memory = driver->root.root.memory; - exec = driver->context; - - if ( !driver->context ) - { - FT_Error error; - - - /* allocate object */ - if ( FT_NEW( exec ) ) - goto Fail; - - /* initialize it; in case of error this deallocates `exec' too */ - error = Init_Context( exec, memory ); - if ( error ) - goto Fail; - - /* store it into the driver */ - driver->context = exec; - } - - return driver->context; - - Fail: - return NULL; - } - - - /*************************************************************************/ - /* */ - /* Before an opcode is executed, the interpreter verifies that there are */ - /* enough arguments on the stack, with the help of the `Pop_Push_Count' */ - /* table. */ - /* */ - /* For each opcode, the first column gives the number of arguments that */ - /* are popped from the stack; the second one gives the number of those */ - /* that are pushed in result. */ - /* */ - /* Opcodes which have a varying number of parameters in the data stream */ - /* (NPUSHB, NPUSHW) are handled specially; they have a negative value in */ - /* the `opcode_length' table, and the value in `Pop_Push_Count' is set */ - /* to zero. */ - /* */ - /*************************************************************************/ - - -#undef PACK -#define PACK( x, y ) ( ( x << 4 ) | y ) - - - static - const FT_Byte Pop_Push_Count[256] = - { - /* opcodes are gathered in groups of 16 */ - /* please keep the spaces as they are */ - - /* SVTCA y */ PACK( 0, 0 ), - /* SVTCA x */ PACK( 0, 0 ), - /* SPvTCA y */ PACK( 0, 0 ), - /* SPvTCA x */ PACK( 0, 0 ), - /* SFvTCA y */ PACK( 0, 0 ), - /* SFvTCA x */ PACK( 0, 0 ), - /* SPvTL // */ PACK( 2, 0 ), - /* SPvTL + */ PACK( 2, 0 ), - /* SFvTL // */ PACK( 2, 0 ), - /* SFvTL + */ PACK( 2, 0 ), - /* SPvFS */ PACK( 2, 0 ), - /* SFvFS */ PACK( 2, 0 ), - /* GPV */ PACK( 0, 2 ), - /* GFV */ PACK( 0, 2 ), - /* SFvTPv */ PACK( 0, 0 ), - /* ISECT */ PACK( 5, 0 ), - - /* SRP0 */ PACK( 1, 0 ), - /* SRP1 */ PACK( 1, 0 ), - /* SRP2 */ PACK( 1, 0 ), - /* SZP0 */ PACK( 1, 0 ), - /* SZP1 */ PACK( 1, 0 ), - /* SZP2 */ PACK( 1, 0 ), - /* SZPS */ PACK( 1, 0 ), - /* SLOOP */ PACK( 1, 0 ), - /* RTG */ PACK( 0, 0 ), - /* RTHG */ PACK( 0, 0 ), - /* SMD */ PACK( 1, 0 ), - /* ELSE */ PACK( 0, 0 ), - /* JMPR */ PACK( 1, 0 ), - /* SCvTCi */ PACK( 1, 0 ), - /* SSwCi */ PACK( 1, 0 ), - /* SSW */ PACK( 1, 0 ), - - /* DUP */ PACK( 1, 2 ), - /* POP */ PACK( 1, 0 ), - /* CLEAR */ PACK( 0, 0 ), - /* SWAP */ PACK( 2, 2 ), - /* DEPTH */ PACK( 0, 1 ), - /* CINDEX */ PACK( 1, 1 ), - /* MINDEX */ PACK( 1, 0 ), - /* AlignPTS */ PACK( 2, 0 ), - /* INS_$28 */ PACK( 0, 0 ), - /* UTP */ PACK( 1, 0 ), - /* LOOPCALL */ PACK( 2, 0 ), - /* CALL */ PACK( 1, 0 ), - /* FDEF */ PACK( 1, 0 ), - /* ENDF */ PACK( 0, 0 ), - /* MDAP[0] */ PACK( 1, 0 ), - /* MDAP[1] */ PACK( 1, 0 ), - - /* IUP[0] */ PACK( 0, 0 ), - /* IUP[1] */ PACK( 0, 0 ), - /* SHP[0] */ PACK( 0, 0 ), - /* SHP[1] */ PACK( 0, 0 ), - /* SHC[0] */ PACK( 1, 0 ), - /* SHC[1] */ PACK( 1, 0 ), - /* SHZ[0] */ PACK( 1, 0 ), - /* SHZ[1] */ PACK( 1, 0 ), - /* SHPIX */ PACK( 1, 0 ), - /* IP */ PACK( 0, 0 ), - /* MSIRP[0] */ PACK( 2, 0 ), - /* MSIRP[1] */ PACK( 2, 0 ), - /* AlignRP */ PACK( 0, 0 ), - /* RTDG */ PACK( 0, 0 ), - /* MIAP[0] */ PACK( 2, 0 ), - /* MIAP[1] */ PACK( 2, 0 ), - - /* NPushB */ PACK( 0, 0 ), - /* NPushW */ PACK( 0, 0 ), - /* WS */ PACK( 2, 0 ), - /* RS */ PACK( 1, 1 ), - /* WCvtP */ PACK( 2, 0 ), - /* RCvt */ PACK( 1, 1 ), - /* GC[0] */ PACK( 1, 1 ), - /* GC[1] */ PACK( 1, 1 ), - /* SCFS */ PACK( 2, 0 ), - /* MD[0] */ PACK( 2, 1 ), - /* MD[1] */ PACK( 2, 1 ), - /* MPPEM */ PACK( 0, 1 ), - /* MPS */ PACK( 0, 1 ), - /* FlipON */ PACK( 0, 0 ), - /* FlipOFF */ PACK( 0, 0 ), - /* DEBUG */ PACK( 1, 0 ), - - /* LT */ PACK( 2, 1 ), - /* LTEQ */ PACK( 2, 1 ), - /* GT */ PACK( 2, 1 ), - /* GTEQ */ PACK( 2, 1 ), - /* EQ */ PACK( 2, 1 ), - /* NEQ */ PACK( 2, 1 ), - /* ODD */ PACK( 1, 1 ), - /* EVEN */ PACK( 1, 1 ), - /* IF */ PACK( 1, 0 ), - /* EIF */ PACK( 0, 0 ), - /* AND */ PACK( 2, 1 ), - /* OR */ PACK( 2, 1 ), - /* NOT */ PACK( 1, 1 ), - /* DeltaP1 */ PACK( 1, 0 ), - /* SDB */ PACK( 1, 0 ), - /* SDS */ PACK( 1, 0 ), - - /* ADD */ PACK( 2, 1 ), - /* SUB */ PACK( 2, 1 ), - /* DIV */ PACK( 2, 1 ), - /* MUL */ PACK( 2, 1 ), - /* ABS */ PACK( 1, 1 ), - /* NEG */ PACK( 1, 1 ), - /* FLOOR */ PACK( 1, 1 ), - /* CEILING */ PACK( 1, 1 ), - /* ROUND[0] */ PACK( 1, 1 ), - /* ROUND[1] */ PACK( 1, 1 ), - /* ROUND[2] */ PACK( 1, 1 ), - /* ROUND[3] */ PACK( 1, 1 ), - /* NROUND[0] */ PACK( 1, 1 ), - /* NROUND[1] */ PACK( 1, 1 ), - /* NROUND[2] */ PACK( 1, 1 ), - /* NROUND[3] */ PACK( 1, 1 ), - - /* WCvtF */ PACK( 2, 0 ), - /* DeltaP2 */ PACK( 1, 0 ), - /* DeltaP3 */ PACK( 1, 0 ), - /* DeltaCn[0] */ PACK( 1, 0 ), - /* DeltaCn[1] */ PACK( 1, 0 ), - /* DeltaCn[2] */ PACK( 1, 0 ), - /* SROUND */ PACK( 1, 0 ), - /* S45Round */ PACK( 1, 0 ), - /* JROT */ PACK( 2, 0 ), - /* JROF */ PACK( 2, 0 ), - /* ROFF */ PACK( 0, 0 ), - /* INS_$7B */ PACK( 0, 0 ), - /* RUTG */ PACK( 0, 0 ), - /* RDTG */ PACK( 0, 0 ), - /* SANGW */ PACK( 1, 0 ), - /* AA */ PACK( 1, 0 ), - - /* FlipPT */ PACK( 0, 0 ), - /* FlipRgON */ PACK( 2, 0 ), - /* FlipRgOFF */ PACK( 2, 0 ), - /* INS_$83 */ PACK( 0, 0 ), - /* INS_$84 */ PACK( 0, 0 ), - /* ScanCTRL */ PACK( 1, 0 ), - /* SDPVTL[0] */ PACK( 2, 0 ), - /* SDPVTL[1] */ PACK( 2, 0 ), - /* GetINFO */ PACK( 1, 1 ), - /* IDEF */ PACK( 1, 0 ), - /* ROLL */ PACK( 3, 3 ), - /* MAX */ PACK( 2, 1 ), - /* MIN */ PACK( 2, 1 ), - /* ScanTYPE */ PACK( 1, 0 ), - /* InstCTRL */ PACK( 2, 0 ), - /* INS_$8F */ PACK( 0, 0 ), - - /* INS_$90 */ PACK( 0, 0 ), - /* INS_$91 */ PACK( 0, 0 ), - /* INS_$92 */ PACK( 0, 0 ), - /* INS_$93 */ PACK( 0, 0 ), - /* INS_$94 */ PACK( 0, 0 ), - /* INS_$95 */ PACK( 0, 0 ), - /* INS_$96 */ PACK( 0, 0 ), - /* INS_$97 */ PACK( 0, 0 ), - /* INS_$98 */ PACK( 0, 0 ), - /* INS_$99 */ PACK( 0, 0 ), - /* INS_$9A */ PACK( 0, 0 ), - /* INS_$9B */ PACK( 0, 0 ), - /* INS_$9C */ PACK( 0, 0 ), - /* INS_$9D */ PACK( 0, 0 ), - /* INS_$9E */ PACK( 0, 0 ), - /* INS_$9F */ PACK( 0, 0 ), - - /* INS_$A0 */ PACK( 0, 0 ), - /* INS_$A1 */ PACK( 0, 0 ), - /* INS_$A2 */ PACK( 0, 0 ), - /* INS_$A3 */ PACK( 0, 0 ), - /* INS_$A4 */ PACK( 0, 0 ), - /* INS_$A5 */ PACK( 0, 0 ), - /* INS_$A6 */ PACK( 0, 0 ), - /* INS_$A7 */ PACK( 0, 0 ), - /* INS_$A8 */ PACK( 0, 0 ), - /* INS_$A9 */ PACK( 0, 0 ), - /* INS_$AA */ PACK( 0, 0 ), - /* INS_$AB */ PACK( 0, 0 ), - /* INS_$AC */ PACK( 0, 0 ), - /* INS_$AD */ PACK( 0, 0 ), - /* INS_$AE */ PACK( 0, 0 ), - /* INS_$AF */ PACK( 0, 0 ), - - /* PushB[0] */ PACK( 0, 1 ), - /* PushB[1] */ PACK( 0, 2 ), - /* PushB[2] */ PACK( 0, 3 ), - /* PushB[3] */ PACK( 0, 4 ), - /* PushB[4] */ PACK( 0, 5 ), - /* PushB[5] */ PACK( 0, 6 ), - /* PushB[6] */ PACK( 0, 7 ), - /* PushB[7] */ PACK( 0, 8 ), - /* PushW[0] */ PACK( 0, 1 ), - /* PushW[1] */ PACK( 0, 2 ), - /* PushW[2] */ PACK( 0, 3 ), - /* PushW[3] */ PACK( 0, 4 ), - /* PushW[4] */ PACK( 0, 5 ), - /* PushW[5] */ PACK( 0, 6 ), - /* PushW[6] */ PACK( 0, 7 ), - /* PushW[7] */ PACK( 0, 8 ), - - /* MDRP[00] */ PACK( 1, 0 ), - /* MDRP[01] */ PACK( 1, 0 ), - /* MDRP[02] */ PACK( 1, 0 ), - /* MDRP[03] */ PACK( 1, 0 ), - /* MDRP[04] */ PACK( 1, 0 ), - /* MDRP[05] */ PACK( 1, 0 ), - /* MDRP[06] */ PACK( 1, 0 ), - /* MDRP[07] */ PACK( 1, 0 ), - /* MDRP[08] */ PACK( 1, 0 ), - /* MDRP[09] */ PACK( 1, 0 ), - /* MDRP[10] */ PACK( 1, 0 ), - /* MDRP[11] */ PACK( 1, 0 ), - /* MDRP[12] */ PACK( 1, 0 ), - /* MDRP[13] */ PACK( 1, 0 ), - /* MDRP[14] */ PACK( 1, 0 ), - /* MDRP[15] */ PACK( 1, 0 ), - - /* MDRP[16] */ PACK( 1, 0 ), - /* MDRP[17] */ PACK( 1, 0 ), - /* MDRP[18] */ PACK( 1, 0 ), - /* MDRP[19] */ PACK( 1, 0 ), - /* MDRP[20] */ PACK( 1, 0 ), - /* MDRP[21] */ PACK( 1, 0 ), - /* MDRP[22] */ PACK( 1, 0 ), - /* MDRP[23] */ PACK( 1, 0 ), - /* MDRP[24] */ PACK( 1, 0 ), - /* MDRP[25] */ PACK( 1, 0 ), - /* MDRP[26] */ PACK( 1, 0 ), - /* MDRP[27] */ PACK( 1, 0 ), - /* MDRP[28] */ PACK( 1, 0 ), - /* MDRP[29] */ PACK( 1, 0 ), - /* MDRP[30] */ PACK( 1, 0 ), - /* MDRP[31] */ PACK( 1, 0 ), - - /* MIRP[00] */ PACK( 2, 0 ), - /* MIRP[01] */ PACK( 2, 0 ), - /* MIRP[02] */ PACK( 2, 0 ), - /* MIRP[03] */ PACK( 2, 0 ), - /* MIRP[04] */ PACK( 2, 0 ), - /* MIRP[05] */ PACK( 2, 0 ), - /* MIRP[06] */ PACK( 2, 0 ), - /* MIRP[07] */ PACK( 2, 0 ), - /* MIRP[08] */ PACK( 2, 0 ), - /* MIRP[09] */ PACK( 2, 0 ), - /* MIRP[10] */ PACK( 2, 0 ), - /* MIRP[11] */ PACK( 2, 0 ), - /* MIRP[12] */ PACK( 2, 0 ), - /* MIRP[13] */ PACK( 2, 0 ), - /* MIRP[14] */ PACK( 2, 0 ), - /* MIRP[15] */ PACK( 2, 0 ), - - /* MIRP[16] */ PACK( 2, 0 ), - /* MIRP[17] */ PACK( 2, 0 ), - /* MIRP[18] */ PACK( 2, 0 ), - /* MIRP[19] */ PACK( 2, 0 ), - /* MIRP[20] */ PACK( 2, 0 ), - /* MIRP[21] */ PACK( 2, 0 ), - /* MIRP[22] */ PACK( 2, 0 ), - /* MIRP[23] */ PACK( 2, 0 ), - /* MIRP[24] */ PACK( 2, 0 ), - /* MIRP[25] */ PACK( 2, 0 ), - /* MIRP[26] */ PACK( 2, 0 ), - /* MIRP[27] */ PACK( 2, 0 ), - /* MIRP[28] */ PACK( 2, 0 ), - /* MIRP[29] */ PACK( 2, 0 ), - /* MIRP[30] */ PACK( 2, 0 ), - /* MIRP[31] */ PACK( 2, 0 ) - }; - - -#ifdef FT_DEBUG_LEVEL_TRACE - - static - const char* const opcode_name[256] = - { - "SVTCA y", - "SVTCA x", - "SPvTCA y", - "SPvTCA x", - "SFvTCA y", - "SFvTCA x", - "SPvTL ||", - "SPvTL +", - "SFvTL ||", - "SFvTL +", - "SPvFS", - "SFvFS", - "GPV", - "GFV", - "SFvTPv", - "ISECT", - - "SRP0", - "SRP1", - "SRP2", - "SZP0", - "SZP1", - "SZP2", - "SZPS", - "SLOOP", - "RTG", - "RTHG", - "SMD", - "ELSE", - "JMPR", - "SCvTCi", - "SSwCi", - "SSW", - - "DUP", - "POP", - "CLEAR", - "SWAP", - "DEPTH", - "CINDEX", - "MINDEX", - "AlignPTS", - "INS_$28", - "UTP", - "LOOPCALL", - "CALL", - "FDEF", - "ENDF", - "MDAP[0]", - "MDAP[1]", - - "IUP[0]", - "IUP[1]", - "SHP[0]", - "SHP[1]", - "SHC[0]", - "SHC[1]", - "SHZ[0]", - "SHZ[1]", - "SHPIX", - "IP", - "MSIRP[0]", - "MSIRP[1]", - "AlignRP", - "RTDG", - "MIAP[0]", - "MIAP[1]", - - "NPushB", - "NPushW", - "WS", - "RS", - "WCvtP", - "RCvt", - "GC[0]", - "GC[1]", - "SCFS", - "MD[0]", - "MD[1]", - "MPPEM", - "MPS", - "FlipON", - "FlipOFF", - "DEBUG", - - "LT", - "LTEQ", - "GT", - "GTEQ", - "EQ", - "NEQ", - "ODD", - "EVEN", - "IF", - "EIF", - "AND", - "OR", - "NOT", - "DeltaP1", - "SDB", - "SDS", - - "ADD", - "SUB", - "DIV", - "MUL", - "ABS", - "NEG", - "FLOOR", - "CEILING", - "ROUND[0]", - "ROUND[1]", - "ROUND[2]", - "ROUND[3]", - "NROUND[0]", - "NROUND[1]", - "NROUND[2]", - "NROUND[3]", - - "WCvtF", - "DeltaP2", - "DeltaP3", - "DeltaCn[0]", - "DeltaCn[1]", - "DeltaCn[2]", - "SROUND", - "S45Round", - "JROT", - "JROF", - "ROFF", - "INS_$7B", - "RUTG", - "RDTG", - "SANGW", - "AA", - - "FlipPT", - "FlipRgON", - "FlipRgOFF", - "INS_$83", - "INS_$84", - "ScanCTRL", - "SDVPTL[0]", - "SDVPTL[1]", - "GetINFO", - "IDEF", - "ROLL", - "MAX", - "MIN", - "ScanTYPE", - "InstCTRL", - "INS_$8F", - - "INS_$90", - "INS_$91", - "INS_$92", - "INS_$93", - "INS_$94", - "INS_$95", - "INS_$96", - "INS_$97", - "INS_$98", - "INS_$99", - "INS_$9A", - "INS_$9B", - "INS_$9C", - "INS_$9D", - "INS_$9E", - "INS_$9F", - - "INS_$A0", - "INS_$A1", - "INS_$A2", - "INS_$A3", - "INS_$A4", - "INS_$A5", - "INS_$A6", - "INS_$A7", - "INS_$A8", - "INS_$A9", - "INS_$AA", - "INS_$AB", - "INS_$AC", - "INS_$AD", - "INS_$AE", - "INS_$AF", - - "PushB[0]", - "PushB[1]", - "PushB[2]", - "PushB[3]", - "PushB[4]", - "PushB[5]", - "PushB[6]", - "PushB[7]", - "PushW[0]", - "PushW[1]", - "PushW[2]", - "PushW[3]", - "PushW[4]", - "PushW[5]", - "PushW[6]", - "PushW[7]", - - "MDRP[00]", - "MDRP[01]", - "MDRP[02]", - "MDRP[03]", - "MDRP[04]", - "MDRP[05]", - "MDRP[06]", - "MDRP[07]", - "MDRP[08]", - "MDRP[09]", - "MDRP[10]", - "MDRP[11]", - "MDRP[12]", - "MDRP[13]", - "MDRP[14]", - "MDRP[15]", - - "MDRP[16]", - "MDRP[17]", - "MDRP[18]", - "MDRP[19]", - "MDRP[20]", - "MDRP[21]", - "MDRP[22]", - "MDRP[23]", - "MDRP[24]", - "MDRP[25]", - "MDRP[26]", - "MDRP[27]", - "MDRP[28]", - "MDRP[29]", - "MDRP[30]", - "MDRP[31]", - - "MIRP[00]", - "MIRP[01]", - "MIRP[02]", - "MIRP[03]", - "MIRP[04]", - "MIRP[05]", - "MIRP[06]", - "MIRP[07]", - "MIRP[08]", - "MIRP[09]", - "MIRP[10]", - "MIRP[11]", - "MIRP[12]", - "MIRP[13]", - "MIRP[14]", - "MIRP[15]", - - "MIRP[16]", - "MIRP[17]", - "MIRP[18]", - "MIRP[19]", - "MIRP[20]", - "MIRP[21]", - "MIRP[22]", - "MIRP[23]", - "MIRP[24]", - "MIRP[25]", - "MIRP[26]", - "MIRP[27]", - "MIRP[28]", - "MIRP[29]", - "MIRP[30]", - "MIRP[31]" - }; - -#endif /* FT_DEBUG_LEVEL_TRACE */ - - - static - const FT_Char opcode_length[256] = - { - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - - -1,-2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 2, 3, 4, 5, 6, 7, 8, 9, 3, 5, 7, 9, 11,13,15,17, - - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 - }; - -#undef PACK - -#if 1 - - static FT_Int32 - TT_MulFix14( FT_Int32 a, - FT_Int b ) - { - FT_Int32 sign; - FT_UInt32 ah, al, mid, lo, hi; - - - sign = a ^ b; - - if ( a < 0 ) - a = -a; - if ( b < 0 ) - b = -b; - - ah = (FT_UInt32)( ( a >> 16 ) & 0xFFFFU ); - al = (FT_UInt32)( a & 0xFFFFU ); - - lo = al * b; - mid = ah * b; - hi = mid >> 16; - mid = ( mid << 16 ) + ( 1 << 13 ); /* rounding */ - lo += mid; - if ( lo < mid ) - hi += 1; - - mid = ( lo >> 14 ) | ( hi << 18 ); - - return sign >= 0 ? (FT_Int32)mid : -(FT_Int32)mid; - } - -#else - - /* compute (a*b)/2^14 with maximum accuracy and rounding */ - static FT_Int32 - TT_MulFix14( FT_Int32 a, - FT_Int b ) - { - FT_Int32 m, s, hi; - FT_UInt32 l, lo; - - - /* compute ax*bx as 64-bit value */ - l = (FT_UInt32)( ( a & 0xFFFFU ) * b ); - m = ( a >> 16 ) * b; - - lo = l + ( (FT_UInt32)m << 16 ); - hi = ( m >> 16 ) + ( (FT_Int32)l >> 31 ) + ( lo < l ); - - /* divide the result by 2^14 with rounding */ - s = hi >> 31; - l = lo + (FT_UInt32)s; - hi += s + ( l < lo ); - lo = l; - - l = lo + 0x2000U; - hi += l < lo; - - return (FT_Int32)( ( (FT_UInt32)hi << 18 ) | ( l >> 14 ) ); - } -#endif - - - /* compute (ax*bx+ay*by)/2^14 with maximum accuracy and rounding */ - static FT_Int32 - TT_DotFix14( FT_Int32 ax, - FT_Int32 ay, - FT_Int bx, - FT_Int by ) - { - FT_Int32 m, s, hi1, hi2, hi; - FT_UInt32 l, lo1, lo2, lo; - - - /* compute ax*bx as 64-bit value */ - l = (FT_UInt32)( ( ax & 0xFFFFU ) * bx ); - m = ( ax >> 16 ) * bx; - - lo1 = l + ( (FT_UInt32)m << 16 ); - hi1 = ( m >> 16 ) + ( (FT_Int32)l >> 31 ) + ( lo1 < l ); - - /* compute ay*by as 64-bit value */ - l = (FT_UInt32)( ( ay & 0xFFFFU ) * by ); - m = ( ay >> 16 ) * by; - - lo2 = l + ( (FT_UInt32)m << 16 ); - hi2 = ( m >> 16 ) + ( (FT_Int32)l >> 31 ) + ( lo2 < l ); - - /* add them */ - lo = lo1 + lo2; - hi = hi1 + hi2 + ( lo < lo1 ); - - /* divide the result by 2^14 with rounding */ - s = hi >> 31; - l = lo + (FT_UInt32)s; - hi += s + ( l < lo ); - lo = l; - - l = lo + 0x2000U; - hi += ( l < lo ); - - return (FT_Int32)( ( (FT_UInt32)hi << 18 ) | ( l >> 14 ) ); - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Current_Ratio */ - /* */ - /* <Description> */ - /* Returns the current aspect ratio scaling factor depending on the */ - /* projection vector's state and device resolutions. */ - /* */ - /* <Return> */ - /* The aspect ratio in 16.16 format, always <= 1.0 . */ - /* */ - static FT_Long - Current_Ratio( EXEC_OP ) - { - if ( !CUR.tt_metrics.ratio ) - { -#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING - if ( CUR.face->unpatented_hinting ) - { - if ( CUR.GS.both_x_axis ) - CUR.tt_metrics.ratio = CUR.tt_metrics.x_ratio; - else - CUR.tt_metrics.ratio = CUR.tt_metrics.y_ratio; - } - else -#endif - { - if ( CUR.GS.projVector.y == 0 ) - CUR.tt_metrics.ratio = CUR.tt_metrics.x_ratio; - - else if ( CUR.GS.projVector.x == 0 ) - CUR.tt_metrics.ratio = CUR.tt_metrics.y_ratio; - - else - { - FT_F26Dot6 x, y; - - - x = TT_MulFix14( CUR.tt_metrics.x_ratio, - CUR.GS.projVector.x ); - y = TT_MulFix14( CUR.tt_metrics.y_ratio, - CUR.GS.projVector.y ); - CUR.tt_metrics.ratio = FT_Hypot( x, y ); - } - } - } - return CUR.tt_metrics.ratio; - } - - - static FT_Long - Current_Ppem( EXEC_OP ) - { - return FT_MulFix( CUR.tt_metrics.ppem, CURRENT_Ratio() ); - } - - - /*************************************************************************/ - /* */ - /* Functions related to the control value table (CVT). */ - /* */ - /*************************************************************************/ - - - FT_CALLBACK_DEF( FT_F26Dot6 ) - Read_CVT( EXEC_OP_ FT_ULong idx ) - { - return CUR.cvt[idx]; - } - - - FT_CALLBACK_DEF( FT_F26Dot6 ) - Read_CVT_Stretched( EXEC_OP_ FT_ULong idx ) - { - return FT_MulFix( CUR.cvt[idx], CURRENT_Ratio() ); - } - - - FT_CALLBACK_DEF( void ) - Write_CVT( EXEC_OP_ FT_ULong idx, - FT_F26Dot6 value ) - { - CUR.cvt[idx] = value; - } - - - FT_CALLBACK_DEF( void ) - Write_CVT_Stretched( EXEC_OP_ FT_ULong idx, - FT_F26Dot6 value ) - { - CUR.cvt[idx] = FT_DivFix( value, CURRENT_Ratio() ); - } - - - FT_CALLBACK_DEF( void ) - Move_CVT( EXEC_OP_ FT_ULong idx, - FT_F26Dot6 value ) - { - CUR.cvt[idx] += value; - } - - - FT_CALLBACK_DEF( void ) - Move_CVT_Stretched( EXEC_OP_ FT_ULong idx, - FT_F26Dot6 value ) - { - CUR.cvt[idx] += FT_DivFix( value, CURRENT_Ratio() ); - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* GetShortIns */ - /* */ - /* <Description> */ - /* Returns a short integer taken from the instruction stream at */ - /* address IP. */ - /* */ - /* <Return> */ - /* Short read at code[IP]. */ - /* */ - /* <Note> */ - /* This one could become a macro. */ - /* */ - static FT_Short - GetShortIns( EXEC_OP ) - { - /* Reading a byte stream so there is no endianess (DaveP) */ - CUR.IP += 2; - return (FT_Short)( ( CUR.code[CUR.IP - 2] << 8 ) + - CUR.code[CUR.IP - 1] ); - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Ins_Goto_CodeRange */ - /* */ - /* <Description> */ - /* Goes to a certain code range in the instruction stream. */ - /* */ - /* <Input> */ - /* aRange :: The index of the code range. */ - /* */ - /* aIP :: The new IP address in the code range. */ - /* */ - /* <Return> */ - /* SUCCESS or FAILURE. */ - /* */ - static FT_Bool - Ins_Goto_CodeRange( EXEC_OP_ FT_Int aRange, - FT_ULong aIP ) - { - TT_CodeRange* range; - - - if ( aRange < 1 || aRange > 3 ) - { - CUR.error = FT_THROW( Bad_Argument ); - return FAILURE; - } - - range = &CUR.codeRangeTable[aRange - 1]; - - if ( range->base == NULL ) /* invalid coderange */ - { - CUR.error = FT_THROW( Invalid_CodeRange ); - return FAILURE; - } - - /* NOTE: Because the last instruction of a program may be a CALL */ - /* which will return to the first byte *after* the code */ - /* range, we test for aIP <= Size, instead of aIP < Size. */ - - if ( aIP > range->size ) - { - CUR.error = FT_THROW( Code_Overflow ); - return FAILURE; - } - - CUR.code = range->base; - CUR.codeSize = range->size; - CUR.IP = aIP; - CUR.curRange = aRange; - - return SUCCESS; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Direct_Move */ - /* */ - /* <Description> */ - /* Moves a point by a given distance along the freedom vector. The */ - /* point will be `touched'. */ - /* */ - /* <Input> */ - /* point :: The index of the point to move. */ - /* */ - /* distance :: The distance to apply. */ - /* */ - /* <InOut> */ - /* zone :: The affected glyph zone. */ - /* */ - static void - Direct_Move( EXEC_OP_ TT_GlyphZone zone, - FT_UShort point, - FT_F26Dot6 distance ) - { - FT_F26Dot6 v; - - -#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING - FT_ASSERT( !CUR.face->unpatented_hinting ); -#endif - - v = CUR.GS.freeVector.x; - - if ( v != 0 ) - { -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( !SUBPIXEL_HINTING || - ( !CUR.ignore_x_mode || - ( CUR.sph_tweak_flags & SPH_TWEAK_ALLOW_X_DMOVE ) ) ) -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - zone->cur[point].x += FT_MulDiv( distance, v, CUR.F_dot_P ); - - zone->tags[point] |= FT_CURVE_TAG_TOUCH_X; - } - - v = CUR.GS.freeVector.y; - - if ( v != 0 ) - { - zone->cur[point].y += FT_MulDiv( distance, v, CUR.F_dot_P ); - - zone->tags[point] |= FT_CURVE_TAG_TOUCH_Y; - } - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Direct_Move_Orig */ - /* */ - /* <Description> */ - /* Moves the *original* position of a point by a given distance along */ - /* the freedom vector. Obviously, the point will not be `touched'. */ - /* */ - /* <Input> */ - /* point :: The index of the point to move. */ - /* */ - /* distance :: The distance to apply. */ - /* */ - /* <InOut> */ - /* zone :: The affected glyph zone. */ - /* */ - static void - Direct_Move_Orig( EXEC_OP_ TT_GlyphZone zone, - FT_UShort point, - FT_F26Dot6 distance ) - { - FT_F26Dot6 v; - - -#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING - FT_ASSERT( !CUR.face->unpatented_hinting ); -#endif - - v = CUR.GS.freeVector.x; - - if ( v != 0 ) - zone->org[point].x += FT_MulDiv( distance, v, CUR.F_dot_P ); - - v = CUR.GS.freeVector.y; - - if ( v != 0 ) - zone->org[point].y += FT_MulDiv( distance, v, CUR.F_dot_P ); - } - - - /*************************************************************************/ - /* */ - /* Special versions of Direct_Move() */ - /* */ - /* The following versions are used whenever both vectors are both */ - /* along one of the coordinate unit vectors, i.e. in 90% of the cases. */ - /* */ - /*************************************************************************/ - - - static void - Direct_Move_X( EXEC_OP_ TT_GlyphZone zone, - FT_UShort point, - FT_F26Dot6 distance ) - { - FT_UNUSED_EXEC; - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( !SUBPIXEL_HINTING || - !CUR.ignore_x_mode ) -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - zone->cur[point].x += distance; - - zone->tags[point] |= FT_CURVE_TAG_TOUCH_X; - } - - - static void - Direct_Move_Y( EXEC_OP_ TT_GlyphZone zone, - FT_UShort point, - FT_F26Dot6 distance ) - { - FT_UNUSED_EXEC; - - zone->cur[point].y += distance; - zone->tags[point] |= FT_CURVE_TAG_TOUCH_Y; - } - - - /*************************************************************************/ - /* */ - /* Special versions of Direct_Move_Orig() */ - /* */ - /* The following versions are used whenever both vectors are both */ - /* along one of the coordinate unit vectors, i.e. in 90% of the cases. */ - /* */ - /*************************************************************************/ - - - static void - Direct_Move_Orig_X( EXEC_OP_ TT_GlyphZone zone, - FT_UShort point, - FT_F26Dot6 distance ) - { - FT_UNUSED_EXEC; - - zone->org[point].x += distance; - } - - - static void - Direct_Move_Orig_Y( EXEC_OP_ TT_GlyphZone zone, - FT_UShort point, - FT_F26Dot6 distance ) - { - FT_UNUSED_EXEC; - - zone->org[point].y += distance; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Round_None */ - /* */ - /* <Description> */ - /* Does not round, but adds engine compensation. */ - /* */ - /* <Input> */ - /* distance :: The distance (not) to round. */ - /* */ - /* compensation :: The engine compensation. */ - /* */ - /* <Return> */ - /* The compensated distance. */ - /* */ - /* <Note> */ - /* The TrueType specification says very few about the relationship */ - /* between rounding and engine compensation. However, it seems from */ - /* the description of super round that we should add the compensation */ - /* before rounding. */ - /* */ - static FT_F26Dot6 - Round_None( EXEC_OP_ FT_F26Dot6 distance, - FT_F26Dot6 compensation ) - { - FT_F26Dot6 val; - - FT_UNUSED_EXEC; - - - if ( distance >= 0 ) - { - val = distance + compensation; - if ( distance && val < 0 ) - val = 0; - } - else - { - val = distance - compensation; - if ( val > 0 ) - val = 0; - } - return val; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Round_To_Grid */ - /* */ - /* <Description> */ - /* Rounds value to grid after adding engine compensation. */ - /* */ - /* <Input> */ - /* distance :: The distance to round. */ - /* */ - /* compensation :: The engine compensation. */ - /* */ - /* <Return> */ - /* Rounded distance. */ - /* */ - static FT_F26Dot6 - Round_To_Grid( EXEC_OP_ FT_F26Dot6 distance, - FT_F26Dot6 compensation ) - { - FT_F26Dot6 val; - - FT_UNUSED_EXEC; - - - if ( distance >= 0 ) - { - val = distance + compensation + 32; - if ( distance && val > 0 ) - val &= ~63; - else - val = 0; - } - else - { - val = -FT_PIX_ROUND( compensation - distance ); - if ( val > 0 ) - val = 0; - } - - return val; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Round_To_Half_Grid */ - /* */ - /* <Description> */ - /* Rounds value to half grid after adding engine compensation. */ - /* */ - /* <Input> */ - /* distance :: The distance to round. */ - /* */ - /* compensation :: The engine compensation. */ - /* */ - /* <Return> */ - /* Rounded distance. */ - /* */ - static FT_F26Dot6 - Round_To_Half_Grid( EXEC_OP_ FT_F26Dot6 distance, - FT_F26Dot6 compensation ) - { - FT_F26Dot6 val; - - FT_UNUSED_EXEC; - - - if ( distance >= 0 ) - { - val = FT_PIX_FLOOR( distance + compensation ) + 32; - if ( distance && val < 0 ) - val = 0; - } - else - { - val = -( FT_PIX_FLOOR( compensation - distance ) + 32 ); - if ( val > 0 ) - val = 0; - } - - return val; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Round_Down_To_Grid */ - /* */ - /* <Description> */ - /* Rounds value down to grid after adding engine compensation. */ - /* */ - /* <Input> */ - /* distance :: The distance to round. */ - /* */ - /* compensation :: The engine compensation. */ - /* */ - /* <Return> */ - /* Rounded distance. */ - /* */ - static FT_F26Dot6 - Round_Down_To_Grid( EXEC_OP_ FT_F26Dot6 distance, - FT_F26Dot6 compensation ) - { - FT_F26Dot6 val; - - FT_UNUSED_EXEC; - - - if ( distance >= 0 ) - { - val = distance + compensation; - if ( distance && val > 0 ) - val &= ~63; - else - val = 0; - } - else - { - val = -( ( compensation - distance ) & -64 ); - if ( val > 0 ) - val = 0; - } - - return val; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Round_Up_To_Grid */ - /* */ - /* <Description> */ - /* Rounds value up to grid after adding engine compensation. */ - /* */ - /* <Input> */ - /* distance :: The distance to round. */ - /* */ - /* compensation :: The engine compensation. */ - /* */ - /* <Return> */ - /* Rounded distance. */ - /* */ - static FT_F26Dot6 - Round_Up_To_Grid( EXEC_OP_ FT_F26Dot6 distance, - FT_F26Dot6 compensation ) - { - FT_F26Dot6 val; - - FT_UNUSED_EXEC; - - - if ( distance >= 0 ) - { - val = distance + compensation + 63; - if ( distance && val > 0 ) - val &= ~63; - else - val = 0; - } - else - { - val = -FT_PIX_CEIL( compensation - distance ); - if ( val > 0 ) - val = 0; - } - - return val; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Round_To_Double_Grid */ - /* */ - /* <Description> */ - /* Rounds value to double grid after adding engine compensation. */ - /* */ - /* <Input> */ - /* distance :: The distance to round. */ - /* */ - /* compensation :: The engine compensation. */ - /* */ - /* <Return> */ - /* Rounded distance. */ - /* */ - static FT_F26Dot6 - Round_To_Double_Grid( EXEC_OP_ FT_F26Dot6 distance, - FT_F26Dot6 compensation ) - { - FT_F26Dot6 val; - - FT_UNUSED_EXEC; - - - if ( distance >= 0 ) - { - val = distance + compensation + 16; - if ( distance && val > 0 ) - val &= ~31; - else - val = 0; - } - else - { - val = -FT_PAD_ROUND( compensation - distance, 32 ); - if ( val > 0 ) - val = 0; - } - - return val; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Round_Super */ - /* */ - /* <Description> */ - /* Super-rounds value to grid after adding engine compensation. */ - /* */ - /* <Input> */ - /* distance :: The distance to round. */ - /* */ - /* compensation :: The engine compensation. */ - /* */ - /* <Return> */ - /* Rounded distance. */ - /* */ - /* <Note> */ - /* The TrueType specification says very few about the relationship */ - /* between rounding and engine compensation. However, it seems from */ - /* the description of super round that we should add the compensation */ - /* before rounding. */ - /* */ - static FT_F26Dot6 - Round_Super( EXEC_OP_ FT_F26Dot6 distance, - FT_F26Dot6 compensation ) - { - FT_F26Dot6 val; - - - if ( distance >= 0 ) - { - val = ( distance - CUR.phase + CUR.threshold + compensation ) & - -CUR.period; - if ( distance && val < 0 ) - val = 0; - val += CUR.phase; - } - else - { - val = -( ( CUR.threshold - CUR.phase - distance + compensation ) & - -CUR.period ); - if ( val > 0 ) - val = 0; - val -= CUR.phase; - } - - return val; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Round_Super_45 */ - /* */ - /* <Description> */ - /* Super-rounds value to grid after adding engine compensation. */ - /* */ - /* <Input> */ - /* distance :: The distance to round. */ - /* */ - /* compensation :: The engine compensation. */ - /* */ - /* <Return> */ - /* Rounded distance. */ - /* */ - /* <Note> */ - /* There is a separate function for Round_Super_45() as we may need */ - /* greater precision. */ - /* */ - static FT_F26Dot6 - Round_Super_45( EXEC_OP_ FT_F26Dot6 distance, - FT_F26Dot6 compensation ) - { - FT_F26Dot6 val; - - - if ( distance >= 0 ) - { - val = ( ( distance - CUR.phase + CUR.threshold + compensation ) / - CUR.period ) * CUR.period; - if ( distance && val < 0 ) - val = 0; - val += CUR.phase; - } - else - { - val = -( ( ( CUR.threshold - CUR.phase - distance + compensation ) / - CUR.period ) * CUR.period ); - if ( val > 0 ) - val = 0; - val -= CUR.phase; - } - - return val; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Compute_Round */ - /* */ - /* <Description> */ - /* Sets the rounding mode. */ - /* */ - /* <Input> */ - /* round_mode :: The rounding mode to be used. */ - /* */ - static void - Compute_Round( EXEC_OP_ FT_Byte round_mode ) - { - switch ( round_mode ) - { - case TT_Round_Off: - CUR.func_round = (TT_Round_Func)Round_None; - break; - - case TT_Round_To_Grid: - CUR.func_round = (TT_Round_Func)Round_To_Grid; - break; - - case TT_Round_Up_To_Grid: - CUR.func_round = (TT_Round_Func)Round_Up_To_Grid; - break; - - case TT_Round_Down_To_Grid: - CUR.func_round = (TT_Round_Func)Round_Down_To_Grid; - break; - - case TT_Round_To_Half_Grid: - CUR.func_round = (TT_Round_Func)Round_To_Half_Grid; - break; - - case TT_Round_To_Double_Grid: - CUR.func_round = (TT_Round_Func)Round_To_Double_Grid; - break; - - case TT_Round_Super: - CUR.func_round = (TT_Round_Func)Round_Super; - break; - - case TT_Round_Super_45: - CUR.func_round = (TT_Round_Func)Round_Super_45; - break; - } - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* SetSuperRound */ - /* */ - /* <Description> */ - /* Sets Super Round parameters. */ - /* */ - /* <Input> */ - /* GridPeriod :: The grid period. */ - /* */ - /* selector :: The SROUND opcode. */ - /* */ - static void - SetSuperRound( EXEC_OP_ FT_F26Dot6 GridPeriod, - FT_Long selector ) - { - switch ( (FT_Int)( selector & 0xC0 ) ) - { - case 0: - CUR.period = GridPeriod / 2; - break; - - case 0x40: - CUR.period = GridPeriod; - break; - - case 0x80: - CUR.period = GridPeriod * 2; - break; - - /* This opcode is reserved, but... */ - - case 0xC0: - CUR.period = GridPeriod; - break; - } - - switch ( (FT_Int)( selector & 0x30 ) ) - { - case 0: - CUR.phase = 0; - break; - - case 0x10: - CUR.phase = CUR.period / 4; - break; - - case 0x20: - CUR.phase = CUR.period / 2; - break; - - case 0x30: - CUR.phase = CUR.period * 3 / 4; - break; - } - - if ( ( selector & 0x0F ) == 0 ) - CUR.threshold = CUR.period - 1; - else - CUR.threshold = ( (FT_Int)( selector & 0x0F ) - 4 ) * CUR.period / 8; - - CUR.period /= 256; - CUR.phase /= 256; - CUR.threshold /= 256; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Project */ - /* */ - /* <Description> */ - /* Computes the projection of vector given by (v2-v1) along the */ - /* current projection vector. */ - /* */ - /* <Input> */ - /* v1 :: First input vector. */ - /* v2 :: Second input vector. */ - /* */ - /* <Return> */ - /* The distance in F26dot6 format. */ - /* */ - static FT_F26Dot6 - Project( EXEC_OP_ FT_Pos dx, - FT_Pos dy ) - { -#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING - FT_ASSERT( !CUR.face->unpatented_hinting ); -#endif - - return TT_DotFix14( (FT_UInt32)dx, (FT_UInt32)dy, - CUR.GS.projVector.x, - CUR.GS.projVector.y ); - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Dual_Project */ - /* */ - /* <Description> */ - /* Computes the projection of the vector given by (v2-v1) along the */ - /* current dual vector. */ - /* */ - /* <Input> */ - /* v1 :: First input vector. */ - /* v2 :: Second input vector. */ - /* */ - /* <Return> */ - /* The distance in F26dot6 format. */ - /* */ - static FT_F26Dot6 - Dual_Project( EXEC_OP_ FT_Pos dx, - FT_Pos dy ) - { - return TT_DotFix14( (FT_UInt32)dx, (FT_UInt32)dy, - CUR.GS.dualVector.x, - CUR.GS.dualVector.y ); - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Project_x */ - /* */ - /* <Description> */ - /* Computes the projection of the vector given by (v2-v1) along the */ - /* horizontal axis. */ - /* */ - /* <Input> */ - /* v1 :: First input vector. */ - /* v2 :: Second input vector. */ - /* */ - /* <Return> */ - /* The distance in F26dot6 format. */ - /* */ - static FT_F26Dot6 - Project_x( EXEC_OP_ FT_Pos dx, - FT_Pos dy ) - { - FT_UNUSED_EXEC; - FT_UNUSED( dy ); - - return dx; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Project_y */ - /* */ - /* <Description> */ - /* Computes the projection of the vector given by (v2-v1) along the */ - /* vertical axis. */ - /* */ - /* <Input> */ - /* v1 :: First input vector. */ - /* v2 :: Second input vector. */ - /* */ - /* <Return> */ - /* The distance in F26dot6 format. */ - /* */ - static FT_F26Dot6 - Project_y( EXEC_OP_ FT_Pos dx, - FT_Pos dy ) - { - FT_UNUSED_EXEC; - FT_UNUSED( dx ); - - return dy; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Compute_Funcs */ - /* */ - /* <Description> */ - /* Computes the projection and movement function pointers according */ - /* to the current graphics state. */ - /* */ - static void - Compute_Funcs( EXEC_OP ) - { -#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING - if ( CUR.face->unpatented_hinting ) - { - /* If both vectors point rightwards along the x axis, set */ - /* `both-x-axis' true, otherwise set it false. The x values only */ - /* need be tested because the vector has been normalised to a unit */ - /* vector of length 0x4000 = unity. */ - CUR.GS.both_x_axis = (FT_Bool)( CUR.GS.projVector.x == 0x4000 && - CUR.GS.freeVector.x == 0x4000 ); - - /* Throw away projection and freedom vector information */ - /* because the patents don't allow them to be stored. */ - /* The relevant US Patents are 5155805 and 5325479. */ - CUR.GS.projVector.x = 0; - CUR.GS.projVector.y = 0; - CUR.GS.freeVector.x = 0; - CUR.GS.freeVector.y = 0; - - if ( CUR.GS.both_x_axis ) - { - CUR.func_project = Project_x; - CUR.func_move = Direct_Move_X; - CUR.func_move_orig = Direct_Move_Orig_X; - } - else - { - CUR.func_project = Project_y; - CUR.func_move = Direct_Move_Y; - CUR.func_move_orig = Direct_Move_Orig_Y; - } - - if ( CUR.GS.dualVector.x == 0x4000 ) - CUR.func_dualproj = Project_x; - else if ( CUR.GS.dualVector.y == 0x4000 ) - CUR.func_dualproj = Project_y; - else - CUR.func_dualproj = Dual_Project; - - /* Force recalculation of cached aspect ratio */ - CUR.tt_metrics.ratio = 0; - - return; - } -#endif /* TT_CONFIG_OPTION_UNPATENTED_HINTING */ - - if ( CUR.GS.freeVector.x == 0x4000 ) - CUR.F_dot_P = CUR.GS.projVector.x; - else if ( CUR.GS.freeVector.y == 0x4000 ) - CUR.F_dot_P = CUR.GS.projVector.y; - else - CUR.F_dot_P = ( (FT_Long)CUR.GS.projVector.x * CUR.GS.freeVector.x + - (FT_Long)CUR.GS.projVector.y * CUR.GS.freeVector.y ) >> - 14; - - if ( CUR.GS.projVector.x == 0x4000 ) - CUR.func_project = (TT_Project_Func)Project_x; - else if ( CUR.GS.projVector.y == 0x4000 ) - CUR.func_project = (TT_Project_Func)Project_y; - else - CUR.func_project = (TT_Project_Func)Project; - - if ( CUR.GS.dualVector.x == 0x4000 ) - CUR.func_dualproj = (TT_Project_Func)Project_x; - else if ( CUR.GS.dualVector.y == 0x4000 ) - CUR.func_dualproj = (TT_Project_Func)Project_y; - else - CUR.func_dualproj = (TT_Project_Func)Dual_Project; - - CUR.func_move = (TT_Move_Func)Direct_Move; - CUR.func_move_orig = (TT_Move_Func)Direct_Move_Orig; - - if ( CUR.F_dot_P == 0x4000L ) - { - if ( CUR.GS.freeVector.x == 0x4000 ) - { - CUR.func_move = (TT_Move_Func)Direct_Move_X; - CUR.func_move_orig = (TT_Move_Func)Direct_Move_Orig_X; - } - else if ( CUR.GS.freeVector.y == 0x4000 ) - { - CUR.func_move = (TT_Move_Func)Direct_Move_Y; - CUR.func_move_orig = (TT_Move_Func)Direct_Move_Orig_Y; - } - } - - /* at small sizes, F_dot_P can become too small, resulting */ - /* in overflows and `spikes' in a number of glyphs like `w'. */ - - if ( FT_ABS( CUR.F_dot_P ) < 0x400L ) - CUR.F_dot_P = 0x4000L; - - /* Disable cached aspect ratio */ - CUR.tt_metrics.ratio = 0; - } - - - /*************************************************************************/ - /* */ - /* <Function> */ - /* Normalize */ - /* */ - /* <Description> */ - /* Norms a vector. */ - /* */ - /* <Input> */ - /* Vx :: The horizontal input vector coordinate. */ - /* Vy :: The vertical input vector coordinate. */ - /* */ - /* <Output> */ - /* R :: The normed unit vector. */ - /* */ - /* <Return> */ - /* Returns FAILURE if a vector parameter is zero. */ - /* */ - /* <Note> */ - /* In case Vx and Vy are both zero, Normalize() returns SUCCESS, and */ - /* R is undefined. */ - /* */ - static FT_Bool - Normalize( EXEC_OP_ FT_F26Dot6 Vx, - FT_F26Dot6 Vy, - FT_UnitVector* R ) - { - FT_F26Dot6 W; - - FT_UNUSED_EXEC; - - - if ( FT_ABS( Vx ) < 0x4000L && FT_ABS( Vy ) < 0x4000L ) - { - if ( Vx == 0 && Vy == 0 ) - { - /* XXX: UNDOCUMENTED! It seems that it is possible to try */ - /* to normalize the vector (0,0). Return immediately. */ - return SUCCESS; - } - - Vx *= 0x4000; - Vy *= 0x4000; - } - - W = FT_Hypot( Vx, Vy ); - - R->x = (FT_F2Dot14)TT_DivFix14( Vx, W ); - R->y = (FT_F2Dot14)TT_DivFix14( Vy, W ); - - return SUCCESS; - } - - - /*************************************************************************/ - /* */ - /* Here we start with the implementation of the various opcodes. */ - /* */ - /*************************************************************************/ - - - static FT_Bool - Ins_SxVTL( EXEC_OP_ FT_UShort aIdx1, - FT_UShort aIdx2, - FT_Int aOpc, - FT_UnitVector* Vec ) - { - FT_Long A, B, C; - FT_Vector* p1; - FT_Vector* p2; - - - if ( BOUNDS( aIdx1, CUR.zp2.n_points ) || - BOUNDS( aIdx2, CUR.zp1.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return FAILURE; - } - - p1 = CUR.zp1.cur + aIdx2; - p2 = CUR.zp2.cur + aIdx1; - - A = p1->x - p2->x; - B = p1->y - p2->y; - - /* If p1 == p2, SPVTL and SFVTL behave the same as */ - /* SPVTCA[X] and SFVTCA[X], respectively. */ - /* */ - /* Confirmed by Greg Hitchcock. */ - - if ( A == 0 && B == 0 ) - { - A = 0x4000; - aOpc = 0; - } - - if ( ( aOpc & 1 ) != 0 ) - { - C = B; /* counter clockwise rotation */ - B = A; - A = -C; - } - - NORMalize( A, B, Vec ); - - return SUCCESS; - } - - - /* When not using the big switch statements, the interpreter uses a */ - /* call table defined later below in this source. Each opcode must */ - /* thus have a corresponding function, even trivial ones. */ - /* */ - /* They are all defined there. */ - -#define DO_SVTCA \ - { \ - FT_Short A, B; \ - \ - \ - A = (FT_Short)( CUR.opcode & 1 ) << 14; \ - B = A ^ (FT_Short)0x4000; \ - \ - CUR.GS.freeVector.x = A; \ - CUR.GS.projVector.x = A; \ - CUR.GS.dualVector.x = A; \ - \ - CUR.GS.freeVector.y = B; \ - CUR.GS.projVector.y = B; \ - CUR.GS.dualVector.y = B; \ - \ - COMPUTE_Funcs(); \ - } - - -#define DO_SPVTCA \ - { \ - FT_Short A, B; \ - \ - \ - A = (FT_Short)( CUR.opcode & 1 ) << 14; \ - B = A ^ (FT_Short)0x4000; \ - \ - CUR.GS.projVector.x = A; \ - CUR.GS.dualVector.x = A; \ - \ - CUR.GS.projVector.y = B; \ - CUR.GS.dualVector.y = B; \ - \ - GUESS_VECTOR( freeVector ); \ - \ - COMPUTE_Funcs(); \ - } - - -#define DO_SFVTCA \ - { \ - FT_Short A, B; \ - \ - \ - A = (FT_Short)( CUR.opcode & 1 ) << 14; \ - B = A ^ (FT_Short)0x4000; \ - \ - CUR.GS.freeVector.x = A; \ - CUR.GS.freeVector.y = B; \ - \ - GUESS_VECTOR( projVector ); \ - \ - COMPUTE_Funcs(); \ - } - - -#define DO_SPVTL \ - if ( INS_SxVTL( (FT_UShort)args[1], \ - (FT_UShort)args[0], \ - CUR.opcode, \ - &CUR.GS.projVector ) == SUCCESS ) \ - { \ - CUR.GS.dualVector = CUR.GS.projVector; \ - GUESS_VECTOR( freeVector ); \ - COMPUTE_Funcs(); \ - } - - -#define DO_SFVTL \ - if ( INS_SxVTL( (FT_UShort)args[1], \ - (FT_UShort)args[0], \ - CUR.opcode, \ - &CUR.GS.freeVector ) == SUCCESS ) \ - { \ - GUESS_VECTOR( projVector ); \ - COMPUTE_Funcs(); \ - } - - -#define DO_SFVTPV \ - GUESS_VECTOR( projVector ); \ - CUR.GS.freeVector = CUR.GS.projVector; \ - COMPUTE_Funcs(); - - -#define DO_SPVFS \ - { \ - FT_Short S; \ - FT_Long X, Y; \ - \ - \ - /* Only use low 16bits, then sign extend */ \ - S = (FT_Short)args[1]; \ - Y = (FT_Long)S; \ - S = (FT_Short)args[0]; \ - X = (FT_Long)S; \ - \ - NORMalize( X, Y, &CUR.GS.projVector ); \ - \ - CUR.GS.dualVector = CUR.GS.projVector; \ - GUESS_VECTOR( freeVector ); \ - COMPUTE_Funcs(); \ - } - - -#define DO_SFVFS \ - { \ - FT_Short S; \ - FT_Long X, Y; \ - \ - \ - /* Only use low 16bits, then sign extend */ \ - S = (FT_Short)args[1]; \ - Y = (FT_Long)S; \ - S = (FT_Short)args[0]; \ - X = S; \ - \ - NORMalize( X, Y, &CUR.GS.freeVector ); \ - GUESS_VECTOR( projVector ); \ - COMPUTE_Funcs(); \ - } - - -#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING -#define DO_GPV \ - if ( CUR.face->unpatented_hinting ) \ - { \ - args[0] = CUR.GS.both_x_axis ? 0x4000 : 0; \ - args[1] = CUR.GS.both_x_axis ? 0 : 0x4000; \ - } \ - else \ - { \ - args[0] = CUR.GS.projVector.x; \ - args[1] = CUR.GS.projVector.y; \ - } -#else -#define DO_GPV \ - args[0] = CUR.GS.projVector.x; \ - args[1] = CUR.GS.projVector.y; -#endif - - -#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING -#define DO_GFV \ - if ( CUR.face->unpatented_hinting ) \ - { \ - args[0] = CUR.GS.both_x_axis ? 0x4000 : 0; \ - args[1] = CUR.GS.both_x_axis ? 0 : 0x4000; \ - } \ - else \ - { \ - args[0] = CUR.GS.freeVector.x; \ - args[1] = CUR.GS.freeVector.y; \ - } -#else -#define DO_GFV \ - args[0] = CUR.GS.freeVector.x; \ - args[1] = CUR.GS.freeVector.y; -#endif - - -#define DO_SRP0 \ - CUR.GS.rp0 = (FT_UShort)args[0]; - - -#define DO_SRP1 \ - CUR.GS.rp1 = (FT_UShort)args[0]; - - -#define DO_SRP2 \ - CUR.GS.rp2 = (FT_UShort)args[0]; - - -#define DO_RTHG \ - CUR.GS.round_state = TT_Round_To_Half_Grid; \ - CUR.func_round = (TT_Round_Func)Round_To_Half_Grid; - - -#define DO_RTG \ - CUR.GS.round_state = TT_Round_To_Grid; \ - CUR.func_round = (TT_Round_Func)Round_To_Grid; - - -#define DO_RTDG \ - CUR.GS.round_state = TT_Round_To_Double_Grid; \ - CUR.func_round = (TT_Round_Func)Round_To_Double_Grid; - - -#define DO_RUTG \ - CUR.GS.round_state = TT_Round_Up_To_Grid; \ - CUR.func_round = (TT_Round_Func)Round_Up_To_Grid; - - -#define DO_RDTG \ - CUR.GS.round_state = TT_Round_Down_To_Grid; \ - CUR.func_round = (TT_Round_Func)Round_Down_To_Grid; - - -#define DO_ROFF \ - CUR.GS.round_state = TT_Round_Off; \ - CUR.func_round = (TT_Round_Func)Round_None; - - -#define DO_SROUND \ - SET_SuperRound( 0x4000, args[0] ); \ - CUR.GS.round_state = TT_Round_Super; \ - CUR.func_round = (TT_Round_Func)Round_Super; - - -#define DO_S45ROUND \ - SET_SuperRound( 0x2D41, args[0] ); \ - CUR.GS.round_state = TT_Round_Super_45; \ - CUR.func_round = (TT_Round_Func)Round_Super_45; - - -#define DO_SLOOP \ - if ( args[0] < 0 ) \ - CUR.error = FT_THROW( Bad_Argument ); \ - else \ - CUR.GS.loop = args[0]; - - -#define DO_SMD \ - CUR.GS.minimum_distance = args[0]; - - -#define DO_SCVTCI \ - CUR.GS.control_value_cutin = (FT_F26Dot6)args[0]; - - -#define DO_SSWCI \ - CUR.GS.single_width_cutin = (FT_F26Dot6)args[0]; - - -#define DO_SSW \ - CUR.GS.single_width_value = FT_MulFix( args[0], \ - CUR.tt_metrics.scale ); - - -#define DO_FLIPON \ - CUR.GS.auto_flip = TRUE; - - -#define DO_FLIPOFF \ - CUR.GS.auto_flip = FALSE; - - -#define DO_SDB \ - CUR.GS.delta_base = (FT_Short)args[0]; - - -#define DO_SDS \ - CUR.GS.delta_shift = (FT_Short)args[0]; - - -#define DO_MD /* nothing */ - - -#define DO_MPPEM \ - args[0] = CURRENT_Ppem(); - - - /* Note: The pointSize should be irrelevant in a given font program; */ - /* we thus decide to return only the ppem. */ -#if 0 - -#define DO_MPS \ - args[0] = CUR.metrics.pointSize; - -#else - -#define DO_MPS \ - args[0] = CURRENT_Ppem(); - -#endif /* 0 */ - - -#define DO_DUP \ - args[1] = args[0]; - - -#define DO_CLEAR \ - CUR.new_top = 0; - - -#define DO_SWAP \ - { \ - FT_Long L; \ - \ - \ - L = args[0]; \ - args[0] = args[1]; \ - args[1] = L; \ - } - - -#define DO_DEPTH \ - args[0] = CUR.top; - - -#define DO_CINDEX \ - { \ - FT_Long L; \ - \ - \ - L = args[0]; \ - \ - if ( L <= 0 || L > CUR.args ) \ - { \ - if ( CUR.pedantic_hinting ) \ - CUR.error = FT_THROW( Invalid_Reference ); \ - args[0] = 0; \ - } \ - else \ - args[0] = CUR.stack[CUR.args - L]; \ - } - - -#define DO_JROT \ - if ( args[1] != 0 ) \ - { \ - if ( args[0] == 0 && CUR.args == 0 ) \ - CUR.error = FT_THROW( Bad_Argument ); \ - CUR.IP += args[0]; \ - if ( CUR.IP < 0 || \ - ( CUR.callTop > 0 && \ - CUR.IP > CUR.callStack[CUR.callTop - 1].Cur_End ) ) \ - CUR.error = FT_THROW( Bad_Argument ); \ - CUR.step_ins = FALSE; \ - } - - -#define DO_JMPR \ - if ( args[0] == 0 && CUR.args == 0 ) \ - CUR.error = FT_THROW( Bad_Argument ); \ - CUR.IP += args[0]; \ - if ( CUR.IP < 0 || \ - ( CUR.callTop > 0 && \ - CUR.IP > CUR.callStack[CUR.callTop - 1].Cur_End ) ) \ - CUR.error = FT_THROW( Bad_Argument ); \ - CUR.step_ins = FALSE; - - -#define DO_JROF \ - if ( args[1] == 0 ) \ - { \ - if ( args[0] == 0 && CUR.args == 0 ) \ - CUR.error = FT_THROW( Bad_Argument ); \ - CUR.IP += args[0]; \ - if ( CUR.IP < 0 || \ - ( CUR.callTop > 0 && \ - CUR.IP > CUR.callStack[CUR.callTop - 1].Cur_End ) ) \ - CUR.error = FT_THROW( Bad_Argument ); \ - CUR.step_ins = FALSE; \ - } - - -#define DO_LT \ - args[0] = ( args[0] < args[1] ); - - -#define DO_LTEQ \ - args[0] = ( args[0] <= args[1] ); - - -#define DO_GT \ - args[0] = ( args[0] > args[1] ); - - -#define DO_GTEQ \ - args[0] = ( args[0] >= args[1] ); - - -#define DO_EQ \ - args[0] = ( args[0] == args[1] ); - - -#define DO_NEQ \ - args[0] = ( args[0] != args[1] ); - - -#define DO_ODD \ - args[0] = ( ( CUR_Func_round( args[0], 0 ) & 127 ) == 64 ); - - -#define DO_EVEN \ - args[0] = ( ( CUR_Func_round( args[0], 0 ) & 127 ) == 0 ); - - -#define DO_AND \ - args[0] = ( args[0] && args[1] ); - - -#define DO_OR \ - args[0] = ( args[0] || args[1] ); - - -#define DO_NOT \ - args[0] = !args[0]; - - -#define DO_ADD \ - args[0] += args[1]; - - -#define DO_SUB \ - args[0] -= args[1]; - - -#define DO_DIV \ - if ( args[1] == 0 ) \ - CUR.error = FT_THROW( Divide_By_Zero ); \ - else \ - args[0] = FT_MulDiv_No_Round( args[0], 64L, args[1] ); - - -#define DO_MUL \ - args[0] = FT_MulDiv( args[0], args[1], 64L ); - - -#define DO_ABS \ - args[0] = FT_ABS( args[0] ); - - -#define DO_NEG \ - args[0] = -args[0]; - - -#define DO_FLOOR \ - args[0] = FT_PIX_FLOOR( args[0] ); - - -#define DO_CEILING \ - args[0] = FT_PIX_CEIL( args[0] ); - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - -#define DO_RS \ - { \ - FT_ULong I = (FT_ULong)args[0]; \ - \ - \ - if ( BOUNDSL( I, CUR.storeSize ) ) \ - { \ - if ( CUR.pedantic_hinting ) \ - ARRAY_BOUND_ERROR; \ - else \ - args[0] = 0; \ - } \ - else \ - { \ - /* subpixel hinting - avoid Typeman Dstroke and */ \ - /* IStroke and Vacuform rounds */ \ - \ - if ( SUBPIXEL_HINTING && \ - CUR.ignore_x_mode && \ - ( ( I == 24 && \ - ( CUR.face->sph_found_func_flags & \ - ( SPH_FDEF_SPACING_1 | \ - SPH_FDEF_SPACING_2 ) ) ) || \ - ( I == 22 && \ - ( CUR.sph_in_func_flags & \ - SPH_FDEF_TYPEMAN_STROKES ) ) || \ - ( I == 8 && \ - ( CUR.face->sph_found_func_flags & \ - SPH_FDEF_VACUFORM_ROUND_1 ) && \ - CUR.iup_called ) ) ) \ - args[0] = 0; \ - else \ - args[0] = CUR.storage[I]; \ - } \ - } - -#else /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - -#define DO_RS \ - { \ - FT_ULong I = (FT_ULong)args[0]; \ - \ - \ - if ( BOUNDSL( I, CUR.storeSize ) ) \ - { \ - if ( CUR.pedantic_hinting ) \ - { \ - ARRAY_BOUND_ERROR; \ - } \ - else \ - args[0] = 0; \ - } \ - else \ - args[0] = CUR.storage[I]; \ - } - -#endif /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - -#define DO_WS \ - { \ - FT_ULong I = (FT_ULong)args[0]; \ - \ - \ - if ( BOUNDSL( I, CUR.storeSize ) ) \ - { \ - if ( CUR.pedantic_hinting ) \ - { \ - ARRAY_BOUND_ERROR; \ - } \ - } \ - else \ - CUR.storage[I] = args[1]; \ - } - - -#define DO_RCVT \ - { \ - FT_ULong I = (FT_ULong)args[0]; \ - \ - \ - if ( BOUNDSL( I, CUR.cvtSize ) ) \ - { \ - if ( CUR.pedantic_hinting ) \ - { \ - ARRAY_BOUND_ERROR; \ - } \ - else \ - args[0] = 0; \ - } \ - else \ - args[0] = CUR_Func_read_cvt( I ); \ - } - - -#define DO_WCVTP \ - { \ - FT_ULong I = (FT_ULong)args[0]; \ - \ - \ - if ( BOUNDSL( I, CUR.cvtSize ) ) \ - { \ - if ( CUR.pedantic_hinting ) \ - { \ - ARRAY_BOUND_ERROR; \ - } \ - } \ - else \ - CUR_Func_write_cvt( I, args[1] ); \ - } - - -#define DO_WCVTF \ - { \ - FT_ULong I = (FT_ULong)args[0]; \ - \ - \ - if ( BOUNDSL( I, CUR.cvtSize ) ) \ - { \ - if ( CUR.pedantic_hinting ) \ - { \ - ARRAY_BOUND_ERROR; \ - } \ - } \ - else \ - CUR.cvt[I] = FT_MulFix( args[1], CUR.tt_metrics.scale ); \ - } - - -#define DO_DEBUG \ - CUR.error = FT_THROW( Debug_OpCode ); - - -#define DO_ROUND \ - args[0] = CUR_Func_round( \ - args[0], \ - CUR.tt_metrics.compensations[CUR.opcode - 0x68] ); - - -#define DO_NROUND \ - args[0] = ROUND_None( args[0], \ - CUR.tt_metrics.compensations[CUR.opcode - 0x6C] ); - - -#define DO_MAX \ - if ( args[1] > args[0] ) \ - args[0] = args[1]; - - -#define DO_MIN \ - if ( args[1] < args[0] ) \ - args[0] = args[1]; - - -#ifndef TT_CONFIG_OPTION_INTERPRETER_SWITCH - - -#undef ARRAY_BOUND_ERROR -#define ARRAY_BOUND_ERROR \ - { \ - CUR.error = FT_THROW( Invalid_Reference ); \ - return; \ - } - - - /*************************************************************************/ - /* */ - /* SVTCA[a]: Set (F and P) Vectors to Coordinate Axis */ - /* Opcode range: 0x00-0x01 */ - /* Stack: --> */ - /* */ - static void - Ins_SVTCA( INS_ARG ) - { - DO_SVTCA - } - - - /*************************************************************************/ - /* */ - /* SPVTCA[a]: Set PVector to Coordinate Axis */ - /* Opcode range: 0x02-0x03 */ - /* Stack: --> */ - /* */ - static void - Ins_SPVTCA( INS_ARG ) - { - DO_SPVTCA - } - - - /*************************************************************************/ - /* */ - /* SFVTCA[a]: Set FVector to Coordinate Axis */ - /* Opcode range: 0x04-0x05 */ - /* Stack: --> */ - /* */ - static void - Ins_SFVTCA( INS_ARG ) - { - DO_SFVTCA - } - - - /*************************************************************************/ - /* */ - /* SPVTL[a]: Set PVector To Line */ - /* Opcode range: 0x06-0x07 */ - /* Stack: uint32 uint32 --> */ - /* */ - static void - Ins_SPVTL( INS_ARG ) - { - DO_SPVTL - } - - - /*************************************************************************/ - /* */ - /* SFVTL[a]: Set FVector To Line */ - /* Opcode range: 0x08-0x09 */ - /* Stack: uint32 uint32 --> */ - /* */ - static void - Ins_SFVTL( INS_ARG ) - { - DO_SFVTL - } - - - /*************************************************************************/ - /* */ - /* SFVTPV[]: Set FVector To PVector */ - /* Opcode range: 0x0E */ - /* Stack: --> */ - /* */ - static void - Ins_SFVTPV( INS_ARG ) - { - DO_SFVTPV - } - - - /*************************************************************************/ - /* */ - /* SPVFS[]: Set PVector From Stack */ - /* Opcode range: 0x0A */ - /* Stack: f2.14 f2.14 --> */ - /* */ - static void - Ins_SPVFS( INS_ARG ) - { - DO_SPVFS - } - - - /*************************************************************************/ - /* */ - /* SFVFS[]: Set FVector From Stack */ - /* Opcode range: 0x0B */ - /* Stack: f2.14 f2.14 --> */ - /* */ - static void - Ins_SFVFS( INS_ARG ) - { - DO_SFVFS - } - - - /*************************************************************************/ - /* */ - /* GPV[]: Get Projection Vector */ - /* Opcode range: 0x0C */ - /* Stack: ef2.14 --> ef2.14 */ - /* */ - static void - Ins_GPV( INS_ARG ) - { - DO_GPV - } - - - /*************************************************************************/ - /* GFV[]: Get Freedom Vector */ - /* Opcode range: 0x0D */ - /* Stack: ef2.14 --> ef2.14 */ - /* */ - static void - Ins_GFV( INS_ARG ) - { - DO_GFV - } - - - /*************************************************************************/ - /* */ - /* SRP0[]: Set Reference Point 0 */ - /* Opcode range: 0x10 */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_SRP0( INS_ARG ) - { - DO_SRP0 - } - - - /*************************************************************************/ - /* */ - /* SRP1[]: Set Reference Point 1 */ - /* Opcode range: 0x11 */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_SRP1( INS_ARG ) - { - DO_SRP1 - } - - - /*************************************************************************/ - /* */ - /* SRP2[]: Set Reference Point 2 */ - /* Opcode range: 0x12 */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_SRP2( INS_ARG ) - { - DO_SRP2 - } - - - /*************************************************************************/ - /* */ - /* RTHG[]: Round To Half Grid */ - /* Opcode range: 0x19 */ - /* Stack: --> */ - /* */ - static void - Ins_RTHG( INS_ARG ) - { - DO_RTHG - } - - - /*************************************************************************/ - /* */ - /* RTG[]: Round To Grid */ - /* Opcode range: 0x18 */ - /* Stack: --> */ - /* */ - static void - Ins_RTG( INS_ARG ) - { - DO_RTG - } - - - /*************************************************************************/ - /* RTDG[]: Round To Double Grid */ - /* Opcode range: 0x3D */ - /* Stack: --> */ - /* */ - static void - Ins_RTDG( INS_ARG ) - { - DO_RTDG - } - - - /*************************************************************************/ - /* RUTG[]: Round Up To Grid */ - /* Opcode range: 0x7C */ - /* Stack: --> */ - /* */ - static void - Ins_RUTG( INS_ARG ) - { - DO_RUTG - } - - - /*************************************************************************/ - /* */ - /* RDTG[]: Round Down To Grid */ - /* Opcode range: 0x7D */ - /* Stack: --> */ - /* */ - static void - Ins_RDTG( INS_ARG ) - { - DO_RDTG - } - - - /*************************************************************************/ - /* */ - /* ROFF[]: Round OFF */ - /* Opcode range: 0x7A */ - /* Stack: --> */ - /* */ - static void - Ins_ROFF( INS_ARG ) - { - DO_ROFF - } - - - /*************************************************************************/ - /* */ - /* SROUND[]: Super ROUND */ - /* Opcode range: 0x76 */ - /* Stack: Eint8 --> */ - /* */ - static void - Ins_SROUND( INS_ARG ) - { - DO_SROUND - } - - - /*************************************************************************/ - /* */ - /* S45ROUND[]: Super ROUND 45 degrees */ - /* Opcode range: 0x77 */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_S45ROUND( INS_ARG ) - { - DO_S45ROUND - } - - - /*************************************************************************/ - /* */ - /* SLOOP[]: Set LOOP variable */ - /* Opcode range: 0x17 */ - /* Stack: int32? --> */ - /* */ - static void - Ins_SLOOP( INS_ARG ) - { - DO_SLOOP - } - - - /*************************************************************************/ - /* */ - /* SMD[]: Set Minimum Distance */ - /* Opcode range: 0x1A */ - /* Stack: f26.6 --> */ - /* */ - static void - Ins_SMD( INS_ARG ) - { - DO_SMD - } - - - /*************************************************************************/ - /* */ - /* SCVTCI[]: Set Control Value Table Cut In */ - /* Opcode range: 0x1D */ - /* Stack: f26.6 --> */ - /* */ - static void - Ins_SCVTCI( INS_ARG ) - { - DO_SCVTCI - } - - - /*************************************************************************/ - /* */ - /* SSWCI[]: Set Single Width Cut In */ - /* Opcode range: 0x1E */ - /* Stack: f26.6 --> */ - /* */ - static void - Ins_SSWCI( INS_ARG ) - { - DO_SSWCI - } - - - /*************************************************************************/ - /* */ - /* SSW[]: Set Single Width */ - /* Opcode range: 0x1F */ - /* Stack: int32? --> */ - /* */ - static void - Ins_SSW( INS_ARG ) - { - DO_SSW - } - - - /*************************************************************************/ - /* */ - /* FLIPON[]: Set auto-FLIP to ON */ - /* Opcode range: 0x4D */ - /* Stack: --> */ - /* */ - static void - Ins_FLIPON( INS_ARG ) - { - DO_FLIPON - } - - - /*************************************************************************/ - /* */ - /* FLIPOFF[]: Set auto-FLIP to OFF */ - /* Opcode range: 0x4E */ - /* Stack: --> */ - /* */ - static void - Ins_FLIPOFF( INS_ARG ) - { - DO_FLIPOFF - } - - - /*************************************************************************/ - /* */ - /* SANGW[]: Set ANGle Weight */ - /* Opcode range: 0x7E */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_SANGW( INS_ARG ) - { - /* instruction not supported anymore */ - } - - - /*************************************************************************/ - /* */ - /* SDB[]: Set Delta Base */ - /* Opcode range: 0x5E */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_SDB( INS_ARG ) - { - DO_SDB - } - - - /*************************************************************************/ - /* */ - /* SDS[]: Set Delta Shift */ - /* Opcode range: 0x5F */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_SDS( INS_ARG ) - { - DO_SDS - } - - - /*************************************************************************/ - /* */ - /* MPPEM[]: Measure Pixel Per EM */ - /* Opcode range: 0x4B */ - /* Stack: --> Euint16 */ - /* */ - static void - Ins_MPPEM( INS_ARG ) - { - DO_MPPEM - } - - - /*************************************************************************/ - /* */ - /* MPS[]: Measure Point Size */ - /* Opcode range: 0x4C */ - /* Stack: --> Euint16 */ - /* */ - static void - Ins_MPS( INS_ARG ) - { - DO_MPS - } - - - /*************************************************************************/ - /* */ - /* DUP[]: DUPlicate the top stack's element */ - /* Opcode range: 0x20 */ - /* Stack: StkElt --> StkElt StkElt */ - /* */ - static void - Ins_DUP( INS_ARG ) - { - DO_DUP - } - - - /*************************************************************************/ - /* */ - /* POP[]: POP the stack's top element */ - /* Opcode range: 0x21 */ - /* Stack: StkElt --> */ - /* */ - static void - Ins_POP( INS_ARG ) - { - /* nothing to do */ - } - - - /*************************************************************************/ - /* */ - /* CLEAR[]: CLEAR the entire stack */ - /* Opcode range: 0x22 */ - /* Stack: StkElt... --> */ - /* */ - static void - Ins_CLEAR( INS_ARG ) - { - DO_CLEAR - } - - - /*************************************************************************/ - /* */ - /* SWAP[]: SWAP the stack's top two elements */ - /* Opcode range: 0x23 */ - /* Stack: 2 * StkElt --> 2 * StkElt */ - /* */ - static void - Ins_SWAP( INS_ARG ) - { - DO_SWAP - } - - - /*************************************************************************/ - /* */ - /* DEPTH[]: return the stack DEPTH */ - /* Opcode range: 0x24 */ - /* Stack: --> uint32 */ - /* */ - static void - Ins_DEPTH( INS_ARG ) - { - DO_DEPTH - } - - - /*************************************************************************/ - /* */ - /* CINDEX[]: Copy INDEXed element */ - /* Opcode range: 0x25 */ - /* Stack: int32 --> StkElt */ - /* */ - static void - Ins_CINDEX( INS_ARG ) - { - DO_CINDEX - } - - - /*************************************************************************/ - /* */ - /* EIF[]: End IF */ - /* Opcode range: 0x59 */ - /* Stack: --> */ - /* */ - static void - Ins_EIF( INS_ARG ) - { - /* nothing to do */ - } - - - /*************************************************************************/ - /* */ - /* JROT[]: Jump Relative On True */ - /* Opcode range: 0x78 */ - /* Stack: StkElt int32 --> */ - /* */ - static void - Ins_JROT( INS_ARG ) - { - DO_JROT - } - - - /*************************************************************************/ - /* */ - /* JMPR[]: JuMP Relative */ - /* Opcode range: 0x1C */ - /* Stack: int32 --> */ - /* */ - static void - Ins_JMPR( INS_ARG ) - { - DO_JMPR - } - - - /*************************************************************************/ - /* */ - /* JROF[]: Jump Relative On False */ - /* Opcode range: 0x79 */ - /* Stack: StkElt int32 --> */ - /* */ - static void - Ins_JROF( INS_ARG ) - { - DO_JROF - } - - - /*************************************************************************/ - /* */ - /* LT[]: Less Than */ - /* Opcode range: 0x50 */ - /* Stack: int32? int32? --> bool */ - /* */ - static void - Ins_LT( INS_ARG ) - { - DO_LT - } - - - /*************************************************************************/ - /* */ - /* LTEQ[]: Less Than or EQual */ - /* Opcode range: 0x51 */ - /* Stack: int32? int32? --> bool */ - /* */ - static void - Ins_LTEQ( INS_ARG ) - { - DO_LTEQ - } - - - /*************************************************************************/ - /* */ - /* GT[]: Greater Than */ - /* Opcode range: 0x52 */ - /* Stack: int32? int32? --> bool */ - /* */ - static void - Ins_GT( INS_ARG ) - { - DO_GT - } - - - /*************************************************************************/ - /* */ - /* GTEQ[]: Greater Than or EQual */ - /* Opcode range: 0x53 */ - /* Stack: int32? int32? --> bool */ - /* */ - static void - Ins_GTEQ( INS_ARG ) - { - DO_GTEQ - } - - - /*************************************************************************/ - /* */ - /* EQ[]: EQual */ - /* Opcode range: 0x54 */ - /* Stack: StkElt StkElt --> bool */ - /* */ - static void - Ins_EQ( INS_ARG ) - { - DO_EQ - } - - - /*************************************************************************/ - /* */ - /* NEQ[]: Not EQual */ - /* Opcode range: 0x55 */ - /* Stack: StkElt StkElt --> bool */ - /* */ - static void - Ins_NEQ( INS_ARG ) - { - DO_NEQ - } - - - /*************************************************************************/ - /* */ - /* ODD[]: Is ODD */ - /* Opcode range: 0x56 */ - /* Stack: f26.6 --> bool */ - /* */ - static void - Ins_ODD( INS_ARG ) - { - DO_ODD - } - - - /*************************************************************************/ - /* */ - /* EVEN[]: Is EVEN */ - /* Opcode range: 0x57 */ - /* Stack: f26.6 --> bool */ - /* */ - static void - Ins_EVEN( INS_ARG ) - { - DO_EVEN - } - - - /*************************************************************************/ - /* */ - /* AND[]: logical AND */ - /* Opcode range: 0x5A */ - /* Stack: uint32 uint32 --> uint32 */ - /* */ - static void - Ins_AND( INS_ARG ) - { - DO_AND - } - - - /*************************************************************************/ - /* */ - /* OR[]: logical OR */ - /* Opcode range: 0x5B */ - /* Stack: uint32 uint32 --> uint32 */ - /* */ - static void - Ins_OR( INS_ARG ) - { - DO_OR - } - - - /*************************************************************************/ - /* */ - /* NOT[]: logical NOT */ - /* Opcode range: 0x5C */ - /* Stack: StkElt --> uint32 */ - /* */ - static void - Ins_NOT( INS_ARG ) - { - DO_NOT - } - - - /*************************************************************************/ - /* */ - /* ADD[]: ADD */ - /* Opcode range: 0x60 */ - /* Stack: f26.6 f26.6 --> f26.6 */ - /* */ - static void - Ins_ADD( INS_ARG ) - { - DO_ADD - } - - - /*************************************************************************/ - /* */ - /* SUB[]: SUBtract */ - /* Opcode range: 0x61 */ - /* Stack: f26.6 f26.6 --> f26.6 */ - /* */ - static void - Ins_SUB( INS_ARG ) - { - DO_SUB - } - - - /*************************************************************************/ - /* */ - /* DIV[]: DIVide */ - /* Opcode range: 0x62 */ - /* Stack: f26.6 f26.6 --> f26.6 */ - /* */ - static void - Ins_DIV( INS_ARG ) - { - DO_DIV - } - - - /*************************************************************************/ - /* */ - /* MUL[]: MULtiply */ - /* Opcode range: 0x63 */ - /* Stack: f26.6 f26.6 --> f26.6 */ - /* */ - static void - Ins_MUL( INS_ARG ) - { - DO_MUL - } - - - /*************************************************************************/ - /* */ - /* ABS[]: ABSolute value */ - /* Opcode range: 0x64 */ - /* Stack: f26.6 --> f26.6 */ - /* */ - static void - Ins_ABS( INS_ARG ) - { - DO_ABS - } - - - /*************************************************************************/ - /* */ - /* NEG[]: NEGate */ - /* Opcode range: 0x65 */ - /* Stack: f26.6 --> f26.6 */ - /* */ - static void - Ins_NEG( INS_ARG ) - { - DO_NEG - } - - - /*************************************************************************/ - /* */ - /* FLOOR[]: FLOOR */ - /* Opcode range: 0x66 */ - /* Stack: f26.6 --> f26.6 */ - /* */ - static void - Ins_FLOOR( INS_ARG ) - { - DO_FLOOR - } - - - /*************************************************************************/ - /* */ - /* CEILING[]: CEILING */ - /* Opcode range: 0x67 */ - /* Stack: f26.6 --> f26.6 */ - /* */ - static void - Ins_CEILING( INS_ARG ) - { - DO_CEILING - } - - - /*************************************************************************/ - /* */ - /* RS[]: Read Store */ - /* Opcode range: 0x43 */ - /* Stack: uint32 --> uint32 */ - /* */ - static void - Ins_RS( INS_ARG ) - { - DO_RS - } - - - /*************************************************************************/ - /* */ - /* WS[]: Write Store */ - /* Opcode range: 0x42 */ - /* Stack: uint32 uint32 --> */ - /* */ - static void - Ins_WS( INS_ARG ) - { - DO_WS - } - - - /*************************************************************************/ - /* */ - /* WCVTP[]: Write CVT in Pixel units */ - /* Opcode range: 0x44 */ - /* Stack: f26.6 uint32 --> */ - /* */ - static void - Ins_WCVTP( INS_ARG ) - { - DO_WCVTP - } - - - /*************************************************************************/ - /* */ - /* WCVTF[]: Write CVT in Funits */ - /* Opcode range: 0x70 */ - /* Stack: uint32 uint32 --> */ - /* */ - static void - Ins_WCVTF( INS_ARG ) - { - DO_WCVTF - } - - - /*************************************************************************/ - /* */ - /* RCVT[]: Read CVT */ - /* Opcode range: 0x45 */ - /* Stack: uint32 --> f26.6 */ - /* */ - static void - Ins_RCVT( INS_ARG ) - { - DO_RCVT - } - - - /*************************************************************************/ - /* */ - /* AA[]: Adjust Angle */ - /* Opcode range: 0x7F */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_AA( INS_ARG ) - { - /* intentionally no longer supported */ - } - - - /*************************************************************************/ - /* */ - /* DEBUG[]: DEBUG. Unsupported. */ - /* Opcode range: 0x4F */ - /* Stack: uint32 --> */ - /* */ - /* Note: The original instruction pops a value from the stack. */ - /* */ - static void - Ins_DEBUG( INS_ARG ) - { - DO_DEBUG - } - - - /*************************************************************************/ - /* */ - /* ROUND[ab]: ROUND value */ - /* Opcode range: 0x68-0x6B */ - /* Stack: f26.6 --> f26.6 */ - /* */ - static void - Ins_ROUND( INS_ARG ) - { - DO_ROUND - } - - - /*************************************************************************/ - /* */ - /* NROUND[ab]: No ROUNDing of value */ - /* Opcode range: 0x6C-0x6F */ - /* Stack: f26.6 --> f26.6 */ - /* */ - static void - Ins_NROUND( INS_ARG ) - { - DO_NROUND - } - - - /*************************************************************************/ - /* */ - /* MAX[]: MAXimum */ - /* Opcode range: 0x68 */ - /* Stack: int32? int32? --> int32 */ - /* */ - static void - Ins_MAX( INS_ARG ) - { - DO_MAX - } - - - /*************************************************************************/ - /* */ - /* MIN[]: MINimum */ - /* Opcode range: 0x69 */ - /* Stack: int32? int32? --> int32 */ - /* */ - static void - Ins_MIN( INS_ARG ) - { - DO_MIN - } - - -#endif /* !TT_CONFIG_OPTION_INTERPRETER_SWITCH */ - - - /*************************************************************************/ - /* */ - /* The following functions are called as is within the switch statement. */ - /* */ - /*************************************************************************/ - - - /*************************************************************************/ - /* */ - /* MINDEX[]: Move INDEXed element */ - /* Opcode range: 0x26 */ - /* Stack: int32? --> StkElt */ - /* */ - static void - Ins_MINDEX( INS_ARG ) - { - FT_Long L, K; - - - L = args[0]; - - if ( L <= 0 || L > CUR.args ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - } - else - { - K = CUR.stack[CUR.args - L]; - - FT_ARRAY_MOVE( &CUR.stack[CUR.args - L ], - &CUR.stack[CUR.args - L + 1], - ( L - 1 ) ); - - CUR.stack[CUR.args - 1] = K; - } - } - - - /*************************************************************************/ - /* */ - /* ROLL[]: ROLL top three elements */ - /* Opcode range: 0x8A */ - /* Stack: 3 * StkElt --> 3 * StkElt */ - /* */ - static void - Ins_ROLL( INS_ARG ) - { - FT_Long A, B, C; - - FT_UNUSED_EXEC; - - - A = args[2]; - B = args[1]; - C = args[0]; - - args[2] = C; - args[1] = A; - args[0] = B; - } - - - /*************************************************************************/ - /* */ - /* MANAGING THE FLOW OF CONTROL */ - /* */ - /* Instructions appear in the specification's order. */ - /* */ - /*************************************************************************/ - - - static FT_Bool - SkipCode( EXEC_OP ) - { - CUR.IP += CUR.length; - - if ( CUR.IP < CUR.codeSize ) - { - CUR.opcode = CUR.code[CUR.IP]; - - CUR.length = opcode_length[CUR.opcode]; - if ( CUR.length < 0 ) - { - if ( CUR.IP + 1 >= CUR.codeSize ) - goto Fail_Overflow; - CUR.length = 2 - CUR.length * CUR.code[CUR.IP + 1]; - } - - if ( CUR.IP + CUR.length <= CUR.codeSize ) - return SUCCESS; - } - - Fail_Overflow: - CUR.error = FT_THROW( Code_Overflow ); - return FAILURE; - } - - - /*************************************************************************/ - /* */ - /* IF[]: IF test */ - /* Opcode range: 0x58 */ - /* Stack: StkElt --> */ - /* */ - static void - Ins_IF( INS_ARG ) - { - FT_Int nIfs; - FT_Bool Out; - - - if ( args[0] != 0 ) - return; - - nIfs = 1; - Out = 0; - - do - { - if ( SKIP_Code() == FAILURE ) - return; - - switch ( CUR.opcode ) - { - case 0x58: /* IF */ - nIfs++; - break; - - case 0x1B: /* ELSE */ - Out = FT_BOOL( nIfs == 1 ); - break; - - case 0x59: /* EIF */ - nIfs--; - Out = FT_BOOL( nIfs == 0 ); - break; - } - } while ( Out == 0 ); - } - - - /*************************************************************************/ - /* */ - /* ELSE[]: ELSE */ - /* Opcode range: 0x1B */ - /* Stack: --> */ - /* */ - static void - Ins_ELSE( INS_ARG ) - { - FT_Int nIfs; - - FT_UNUSED_ARG; - - - nIfs = 1; - - do - { - if ( SKIP_Code() == FAILURE ) - return; - - switch ( CUR.opcode ) - { - case 0x58: /* IF */ - nIfs++; - break; - - case 0x59: /* EIF */ - nIfs--; - break; - } - } while ( nIfs != 0 ); - } - - - /*************************************************************************/ - /* */ - /* DEFINING AND USING FUNCTIONS AND INSTRUCTIONS */ - /* */ - /* Instructions appear in the specification's order. */ - /* */ - /*************************************************************************/ - - - /*************************************************************************/ - /* */ - /* FDEF[]: Function DEFinition */ - /* Opcode range: 0x2C */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_FDEF( INS_ARG ) - { - FT_ULong n; - TT_DefRecord* rec; - TT_DefRecord* limit; - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - /* arguments to opcodes are skipped by `SKIP_Code' */ - FT_Byte opcode_pattern[9][12] = { - /* #0 inline delta function 1 */ - { - 0x4B, /* PPEM */ - 0x53, /* GTEQ */ - 0x23, /* SWAP */ - 0x4B, /* PPEM */ - 0x51, /* LTEQ */ - 0x5A, /* AND */ - 0x58, /* IF */ - 0x38, /* SHPIX */ - 0x1B, /* ELSE */ - 0x21, /* POP */ - 0x21, /* POP */ - 0x59 /* EIF */ - }, - /* #1 inline delta function 2 */ - { - 0x4B, /* PPEM */ - 0x54, /* EQ */ - 0x58, /* IF */ - 0x38, /* SHPIX */ - 0x1B, /* ELSE */ - 0x21, /* POP */ - 0x21, /* POP */ - 0x59 /* EIF */ - }, - /* #2 diagonal stroke function */ - { - 0x20, /* DUP */ - 0x20, /* DUP */ - 0xB0, /* PUSHB_1 */ - /* 1 */ - 0x60, /* ADD */ - 0x46, /* GC_cur */ - 0xB0, /* PUSHB_1 */ - /* 64 */ - 0x23, /* SWAP */ - 0x42 /* WS */ - }, - /* #3 VacuFormRound function */ - { - 0x45, /* RCVT */ - 0x23, /* SWAP */ - 0x46, /* GC_cur */ - 0x60, /* ADD */ - 0x20, /* DUP */ - 0xB0 /* PUSHB_1 */ - /* 38 */ - }, - /* #4 TTFautohint bytecode (old) */ - { - 0x20, /* DUP */ - 0x64, /* ABS */ - 0xB0, /* PUSHB_1 */ - /* 32 */ - 0x60, /* ADD */ - 0x66, /* FLOOR */ - 0x23, /* SWAP */ - 0xB0 /* PUSHB_1 */ - }, - /* #5 spacing function 1 */ - { - 0x01, /* SVTCA_x */ - 0xB0, /* PUSHB_1 */ - /* 24 */ - 0x43, /* RS */ - 0x58 /* IF */ - }, - /* #6 spacing function 2 */ - { - 0x01, /* SVTCA_x */ - 0x18, /* RTG */ - 0xB0, /* PUSHB_1 */ - /* 24 */ - 0x43, /* RS */ - 0x58 /* IF */ - }, - /* #7 TypeMan Talk DiagEndCtrl function */ - { - 0x01, /* SVTCA_x */ - 0x20, /* DUP */ - 0xB0, /* PUSHB_1 */ - /* 3 */ - 0x25, /* CINDEX */ - }, - /* #8 TypeMan Talk Align */ - { - 0x06, /* SPVTL */ - 0x7D, /* RDTG */ - }, - }; - FT_UShort opcode_patterns = 9; - FT_UShort opcode_pointer[9] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 }; - FT_UShort opcode_size[9] = { 12, 8, 8, 6, 7, 4, 5, 4, 2 }; - FT_UShort i; -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - - /* some font programs are broken enough to redefine functions! */ - /* We will then parse the current table. */ - - rec = CUR.FDefs; - limit = rec + CUR.numFDefs; - n = args[0]; - - for ( ; rec < limit; rec++ ) - { - if ( rec->opc == n ) - break; - } - - if ( rec == limit ) - { - /* check that there is enough room for new functions */ - if ( CUR.numFDefs >= CUR.maxFDefs ) - { - CUR.error = FT_THROW( Too_Many_Function_Defs ); - return; - } - CUR.numFDefs++; - } - - /* Although FDEF takes unsigned 32-bit integer, */ - /* func # must be within unsigned 16-bit integer */ - if ( n > 0xFFFFU ) - { - CUR.error = FT_THROW( Too_Many_Function_Defs ); - return; - } - - rec->range = CUR.curRange; - rec->opc = (FT_UInt16)n; - rec->start = CUR.IP + 1; - rec->active = TRUE; - rec->inline_delta = FALSE; - rec->sph_fdef_flags = 0x0000; - - if ( n > CUR.maxFunc ) - CUR.maxFunc = (FT_UInt16)n; - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - /* We don't know for sure these are typeman functions, */ - /* however they are only active when RS 22 is called */ - if ( n >= 64 && n <= 66 ) - rec->sph_fdef_flags |= SPH_FDEF_TYPEMAN_STROKES; -#endif - - /* Now skip the whole function definition. */ - /* We don't allow nested IDEFS & FDEFs. */ - - while ( SKIP_Code() == SUCCESS ) - { - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - - if ( SUBPIXEL_HINTING ) - { - for ( i = 0; i < opcode_patterns; i++ ) - { - if ( opcode_pointer[i] < opcode_size[i] && - CUR.opcode == opcode_pattern[i][opcode_pointer[i]] ) - { - opcode_pointer[i] += 1; - - if ( opcode_pointer[i] == opcode_size[i] ) - { - FT_TRACE7(( "sph: Function %d, opcode ptrn: %d, %s %s\n", - i, n, - CUR.face->root.family_name, - CUR.face->root.style_name )); - - switch ( i ) - { - case 0: - rec->sph_fdef_flags |= SPH_FDEF_INLINE_DELTA_1; - CUR.face->sph_found_func_flags |= SPH_FDEF_INLINE_DELTA_1; - break; - - case 1: - rec->sph_fdef_flags |= SPH_FDEF_INLINE_DELTA_2; - CUR.face->sph_found_func_flags |= SPH_FDEF_INLINE_DELTA_2; - break; - - case 2: - switch ( n ) - { - /* needs to be implemented still */ - case 58: - rec->sph_fdef_flags |= SPH_FDEF_DIAGONAL_STROKE; - CUR.face->sph_found_func_flags |= SPH_FDEF_DIAGONAL_STROKE; - } - break; - - case 3: - switch ( n ) - { - case 0: - rec->sph_fdef_flags |= SPH_FDEF_VACUFORM_ROUND_1; - CUR.face->sph_found_func_flags |= SPH_FDEF_VACUFORM_ROUND_1; - } - break; - - case 4: - /* probably not necessary to detect anymore */ - rec->sph_fdef_flags |= SPH_FDEF_TTFAUTOHINT_1; - CUR.face->sph_found_func_flags |= SPH_FDEF_TTFAUTOHINT_1; - break; - - case 5: - switch ( n ) - { - case 0: - case 1: - case 2: - case 4: - case 7: - case 8: - rec->sph_fdef_flags |= SPH_FDEF_SPACING_1; - CUR.face->sph_found_func_flags |= SPH_FDEF_SPACING_1; - } - break; - - case 6: - switch ( n ) - { - case 0: - case 1: - case 2: - case 4: - case 7: - case 8: - rec->sph_fdef_flags |= SPH_FDEF_SPACING_2; - CUR.face->sph_found_func_flags |= SPH_FDEF_SPACING_2; - } - break; - - case 7: - rec->sph_fdef_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL; - CUR.face->sph_found_func_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL; - break; - - case 8: -#if 0 - rec->sph_fdef_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL; - CUR.face->sph_found_func_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL; -#endif - break; - } - opcode_pointer[i] = 0; - } - } - - else - opcode_pointer[i] = 0; - } - - /* Set sph_compatibility_mode only when deltas are detected */ - CUR.face->sph_compatibility_mode = - ( ( CUR.face->sph_found_func_flags & SPH_FDEF_INLINE_DELTA_1 ) | - ( CUR.face->sph_found_func_flags & SPH_FDEF_INLINE_DELTA_2 ) ); - } - -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - switch ( CUR.opcode ) - { - case 0x89: /* IDEF */ - case 0x2C: /* FDEF */ - CUR.error = FT_THROW( Nested_DEFS ); - return; - - case 0x2D: /* ENDF */ - rec->end = CUR.IP; - return; - } - } - } - - - /*************************************************************************/ - /* */ - /* ENDF[]: END Function definition */ - /* Opcode range: 0x2D */ - /* Stack: --> */ - /* */ - static void - Ins_ENDF( INS_ARG ) - { - TT_CallRec* pRec; - - FT_UNUSED_ARG; - - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - CUR.sph_in_func_flags = 0x0000; -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - if ( CUR.callTop <= 0 ) /* We encountered an ENDF without a call */ - { - CUR.error = FT_THROW( ENDF_In_Exec_Stream ); - return; - } - - CUR.callTop--; - - pRec = &CUR.callStack[CUR.callTop]; - - pRec->Cur_Count--; - - CUR.step_ins = FALSE; - - if ( pRec->Cur_Count > 0 ) - { - CUR.callTop++; - CUR.IP = pRec->Cur_Restart; - } - else - /* Loop through the current function */ - INS_Goto_CodeRange( pRec->Caller_Range, - pRec->Caller_IP ); - - /* Exit the current call frame. */ - - /* NOTE: If the last instruction of a program is a */ - /* CALL or LOOPCALL, the return address is */ - /* always out of the code range. This is a */ - /* valid address, and it is why we do not test */ - /* the result of Ins_Goto_CodeRange() here! */ - } - - - /*************************************************************************/ - /* */ - /* CALL[]: CALL function */ - /* Opcode range: 0x2B */ - /* Stack: uint32? --> */ - /* */ - static void - Ins_CALL( INS_ARG ) - { - FT_ULong F; - TT_CallRec* pCrec; - TT_DefRecord* def; - - - /* first of all, check the index */ - - F = args[0]; - if ( BOUNDSL( F, CUR.maxFunc + 1 ) ) - goto Fail; - - /* Except for some old Apple fonts, all functions in a TrueType */ - /* font are defined in increasing order, starting from 0. This */ - /* means that we normally have */ - /* */ - /* CUR.maxFunc+1 == CUR.numFDefs */ - /* CUR.FDefs[n].opc == n for n in 0..CUR.maxFunc */ - /* */ - /* If this isn't true, we need to look up the function table. */ - - def = CUR.FDefs + F; - if ( CUR.maxFunc + 1 != CUR.numFDefs || def->opc != F ) - { - /* look up the FDefs table */ - TT_DefRecord* limit; - - - def = CUR.FDefs; - limit = def + CUR.numFDefs; - - while ( def < limit && def->opc != F ) - def++; - - if ( def == limit ) - goto Fail; - } - - /* check that the function is active */ - if ( !def->active ) - goto Fail; - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && - ( ( CUR.iup_called && - ( CUR.sph_tweak_flags & SPH_TWEAK_NO_CALL_AFTER_IUP ) ) || - ( def->sph_fdef_flags & SPH_FDEF_VACUFORM_ROUND_1 ) ) ) - goto Fail; - else - CUR.sph_in_func_flags = def->sph_fdef_flags; -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - /* check the call stack */ - if ( CUR.callTop >= CUR.callSize ) - { - CUR.error = FT_THROW( Stack_Overflow ); - return; - } - - pCrec = CUR.callStack + CUR.callTop; - - pCrec->Caller_Range = CUR.curRange; - pCrec->Caller_IP = CUR.IP + 1; - pCrec->Cur_Count = 1; - pCrec->Cur_Restart = def->start; - pCrec->Cur_End = def->end; - - CUR.callTop++; - - INS_Goto_CodeRange( def->range, - def->start ); - - CUR.step_ins = FALSE; - - return; - - Fail: - CUR.error = FT_THROW( Invalid_Reference ); - } - - - /*************************************************************************/ - /* */ - /* LOOPCALL[]: LOOP and CALL function */ - /* Opcode range: 0x2A */ - /* Stack: uint32? Eint16? --> */ - /* */ - static void - Ins_LOOPCALL( INS_ARG ) - { - FT_ULong F; - TT_CallRec* pCrec; - TT_DefRecord* def; - - - /* first of all, check the index */ - F = args[1]; - if ( BOUNDSL( F, CUR.maxFunc + 1 ) ) - goto Fail; - - /* Except for some old Apple fonts, all functions in a TrueType */ - /* font are defined in increasing order, starting from 0. This */ - /* means that we normally have */ - /* */ - /* CUR.maxFunc+1 == CUR.numFDefs */ - /* CUR.FDefs[n].opc == n for n in 0..CUR.maxFunc */ - /* */ - /* If this isn't true, we need to look up the function table. */ - - def = CUR.FDefs + F; - if ( CUR.maxFunc + 1 != CUR.numFDefs || def->opc != F ) - { - /* look up the FDefs table */ - TT_DefRecord* limit; - - - def = CUR.FDefs; - limit = def + CUR.numFDefs; - - while ( def < limit && def->opc != F ) - def++; - - if ( def == limit ) - goto Fail; - } - - /* check that the function is active */ - if ( !def->active ) - goto Fail; - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && - ( def->sph_fdef_flags & SPH_FDEF_VACUFORM_ROUND_1 ) ) - goto Fail; - else - CUR.sph_in_func_flags = def->sph_fdef_flags; -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - /* check stack */ - if ( CUR.callTop >= CUR.callSize ) - { - CUR.error = FT_THROW( Stack_Overflow ); - return; - } - - if ( args[0] > 0 ) - { - pCrec = CUR.callStack + CUR.callTop; - - pCrec->Caller_Range = CUR.curRange; - pCrec->Caller_IP = CUR.IP + 1; - pCrec->Cur_Count = (FT_Int)args[0]; - pCrec->Cur_Restart = def->start; - pCrec->Cur_End = def->end; - - CUR.callTop++; - - INS_Goto_CodeRange( def->range, def->start ); - - CUR.step_ins = FALSE; - } - - return; - - Fail: - CUR.error = FT_THROW( Invalid_Reference ); - } - - - /*************************************************************************/ - /* */ - /* IDEF[]: Instruction DEFinition */ - /* Opcode range: 0x89 */ - /* Stack: Eint8 --> */ - /* */ - static void - Ins_IDEF( INS_ARG ) - { - TT_DefRecord* def; - TT_DefRecord* limit; - - - /* First of all, look for the same function in our table */ - - def = CUR.IDefs; - limit = def + CUR.numIDefs; - - for ( ; def < limit; def++ ) - if ( def->opc == (FT_ULong)args[0] ) - break; - - if ( def == limit ) - { - /* check that there is enough room for a new instruction */ - if ( CUR.numIDefs >= CUR.maxIDefs ) - { - CUR.error = FT_THROW( Too_Many_Instruction_Defs ); - return; - } - CUR.numIDefs++; - } - - /* opcode must be unsigned 8-bit integer */ - if ( 0 > args[0] || args[0] > 0x00FF ) - { - CUR.error = FT_THROW( Too_Many_Instruction_Defs ); - return; - } - - def->opc = (FT_Byte)args[0]; - def->start = CUR.IP + 1; - def->range = CUR.curRange; - def->active = TRUE; - - if ( (FT_ULong)args[0] > CUR.maxIns ) - CUR.maxIns = (FT_Byte)args[0]; - - /* Now skip the whole function definition. */ - /* We don't allow nested IDEFs & FDEFs. */ - - while ( SKIP_Code() == SUCCESS ) - { - switch ( CUR.opcode ) - { - case 0x89: /* IDEF */ - case 0x2C: /* FDEF */ - CUR.error = FT_THROW( Nested_DEFS ); - return; - case 0x2D: /* ENDF */ - return; - } - } - } - - - /*************************************************************************/ - /* */ - /* PUSHING DATA ONTO THE INTERPRETER STACK */ - /* */ - /* Instructions appear in the specification's order. */ - /* */ - /*************************************************************************/ - - - /*************************************************************************/ - /* */ - /* NPUSHB[]: PUSH N Bytes */ - /* Opcode range: 0x40 */ - /* Stack: --> uint32... */ - /* */ - static void - Ins_NPUSHB( INS_ARG ) - { - FT_UShort L, K; - - - L = (FT_UShort)CUR.code[CUR.IP + 1]; - - if ( BOUNDS( L, CUR.stackSize + 1 - CUR.top ) ) - { - CUR.error = FT_THROW( Stack_Overflow ); - return; - } - - for ( K = 1; K <= L; K++ ) - args[K - 1] = CUR.code[CUR.IP + K + 1]; - - CUR.new_top += L; - } - - - /*************************************************************************/ - /* */ - /* NPUSHW[]: PUSH N Words */ - /* Opcode range: 0x41 */ - /* Stack: --> int32... */ - /* */ - static void - Ins_NPUSHW( INS_ARG ) - { - FT_UShort L, K; - - - L = (FT_UShort)CUR.code[CUR.IP + 1]; - - if ( BOUNDS( L, CUR.stackSize + 1 - CUR.top ) ) - { - CUR.error = FT_THROW( Stack_Overflow ); - return; - } - - CUR.IP += 2; - - for ( K = 0; K < L; K++ ) - args[K] = GET_ShortIns(); - - CUR.step_ins = FALSE; - CUR.new_top += L; - } - - - /*************************************************************************/ - /* */ - /* PUSHB[abc]: PUSH Bytes */ - /* Opcode range: 0xB0-0xB7 */ - /* Stack: --> uint32... */ - /* */ - static void - Ins_PUSHB( INS_ARG ) - { - FT_UShort L, K; - - - L = (FT_UShort)( CUR.opcode - 0xB0 + 1 ); - - if ( BOUNDS( L, CUR.stackSize + 1 - CUR.top ) ) - { - CUR.error = FT_THROW( Stack_Overflow ); - return; - } - - for ( K = 1; K <= L; K++ ) - args[K - 1] = CUR.code[CUR.IP + K]; - } - - - /*************************************************************************/ - /* */ - /* PUSHW[abc]: PUSH Words */ - /* Opcode range: 0xB8-0xBF */ - /* Stack: --> int32... */ - /* */ - static void - Ins_PUSHW( INS_ARG ) - { - FT_UShort L, K; - - - L = (FT_UShort)( CUR.opcode - 0xB8 + 1 ); - - if ( BOUNDS( L, CUR.stackSize + 1 - CUR.top ) ) - { - CUR.error = FT_THROW( Stack_Overflow ); - return; - } - - CUR.IP++; - - for ( K = 0; K < L; K++ ) - args[K] = GET_ShortIns(); - - CUR.step_ins = FALSE; - } - - - /*************************************************************************/ - /* */ - /* MANAGING THE GRAPHICS STATE */ - /* */ - /* Instructions appear in the specs' order. */ - /* */ - /*************************************************************************/ - - - /*************************************************************************/ - /* */ - /* GC[a]: Get Coordinate projected onto */ - /* Opcode range: 0x46-0x47 */ - /* Stack: uint32 --> f26.6 */ - /* */ - /* XXX: UNDOCUMENTED: Measures from the original glyph must be taken */ - /* along the dual projection vector! */ - /* */ - static void - Ins_GC( INS_ARG ) - { - FT_ULong L; - FT_F26Dot6 R; - - - L = (FT_ULong)args[0]; - - if ( BOUNDSL( L, CUR.zp2.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - R = 0; - } - else - { - if ( CUR.opcode & 1 ) - R = CUR_fast_dualproj( &CUR.zp2.org[L] ); - else - R = CUR_fast_project( &CUR.zp2.cur[L] ); - } - - args[0] = R; - } - - - /*************************************************************************/ - /* */ - /* SCFS[]: Set Coordinate From Stack */ - /* Opcode range: 0x48 */ - /* Stack: f26.6 uint32 --> */ - /* */ - /* Formula: */ - /* */ - /* OA := OA + ( value - OA.p )/( f.p ) * f */ - /* */ - static void - Ins_SCFS( INS_ARG ) - { - FT_Long K; - FT_UShort L; - - - L = (FT_UShort)args[0]; - - if ( BOUNDS( L, CUR.zp2.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - K = CUR_fast_project( &CUR.zp2.cur[L] ); - - CUR_Func_move( &CUR.zp2, L, args[1] - K ); - - /* UNDOCUMENTED! The MS rasterizer does that with */ - /* twilight points (confirmed by Greg Hitchcock) */ - if ( CUR.GS.gep2 == 0 ) - CUR.zp2.org[L] = CUR.zp2.cur[L]; - } - - - /*************************************************************************/ - /* */ - /* MD[a]: Measure Distance */ - /* Opcode range: 0x49-0x4A */ - /* Stack: uint32 uint32 --> f26.6 */ - /* */ - /* XXX: UNDOCUMENTED: Measure taken in the original glyph must be along */ - /* the dual projection vector. */ - /* */ - /* XXX: UNDOCUMENTED: Flag attributes are inverted! */ - /* 0 => measure distance in original outline */ - /* 1 => measure distance in grid-fitted outline */ - /* */ - /* XXX: UNDOCUMENTED: `zp0 - zp1', and not `zp2 - zp1! */ - /* */ - static void - Ins_MD( INS_ARG ) - { - FT_UShort K, L; - FT_F26Dot6 D; - - - K = (FT_UShort)args[1]; - L = (FT_UShort)args[0]; - - if ( BOUNDS( L, CUR.zp0.n_points ) || - BOUNDS( K, CUR.zp1.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - D = 0; - } - else - { - if ( CUR.opcode & 1 ) - D = CUR_Func_project( CUR.zp0.cur + L, CUR.zp1.cur + K ); - else - { - /* XXX: UNDOCUMENTED: twilight zone special case */ - - if ( CUR.GS.gep0 == 0 || CUR.GS.gep1 == 0 ) - { - FT_Vector* vec1 = CUR.zp0.org + L; - FT_Vector* vec2 = CUR.zp1.org + K; - - - D = CUR_Func_dualproj( vec1, vec2 ); - } - else - { - FT_Vector* vec1 = CUR.zp0.orus + L; - FT_Vector* vec2 = CUR.zp1.orus + K; - - - if ( CUR.metrics.x_scale == CUR.metrics.y_scale ) - { - /* this should be faster */ - D = CUR_Func_dualproj( vec1, vec2 ); - D = FT_MulFix( D, CUR.metrics.x_scale ); - } - else - { - FT_Vector vec; - - - vec.x = FT_MulFix( vec1->x - vec2->x, CUR.metrics.x_scale ); - vec.y = FT_MulFix( vec1->y - vec2->y, CUR.metrics.y_scale ); - - D = CUR_fast_dualproj( &vec ); - } - } - } - } - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - /* Disable Type 2 Vacuform Rounds - e.g. Arial Narrow */ - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && FT_ABS( D ) == 64 ) - D += 1; -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - args[0] = D; - } - - - /*************************************************************************/ - /* */ - /* SDPVTL[a]: Set Dual PVector to Line */ - /* Opcode range: 0x86-0x87 */ - /* Stack: uint32 uint32 --> */ - /* */ - static void - Ins_SDPVTL( INS_ARG ) - { - FT_Long A, B, C; - FT_UShort p1, p2; /* was FT_Int in pas type ERROR */ - FT_Int aOpc = CUR.opcode; - - - p1 = (FT_UShort)args[1]; - p2 = (FT_UShort)args[0]; - - if ( BOUNDS( p2, CUR.zp1.n_points ) || - BOUNDS( p1, CUR.zp2.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - { - FT_Vector* v1 = CUR.zp1.org + p2; - FT_Vector* v2 = CUR.zp2.org + p1; - - - A = v1->x - v2->x; - B = v1->y - v2->y; - - /* If v1 == v2, SDPVTL behaves the same as */ - /* SVTCA[X], respectively. */ - /* */ - /* Confirmed by Greg Hitchcock. */ - - if ( A == 0 && B == 0 ) - { - A = 0x4000; - aOpc = 0; - } - } - - if ( ( aOpc & 1 ) != 0 ) - { - C = B; /* counter clockwise rotation */ - B = A; - A = -C; - } - - NORMalize( A, B, &CUR.GS.dualVector ); - - { - FT_Vector* v1 = CUR.zp1.cur + p2; - FT_Vector* v2 = CUR.zp2.cur + p1; - - - A = v1->x - v2->x; - B = v1->y - v2->y; - - if ( A == 0 && B == 0 ) - { - A = 0x4000; - aOpc = 0; - } - } - - if ( ( aOpc & 1 ) != 0 ) - { - C = B; /* counter clockwise rotation */ - B = A; - A = -C; - } - - NORMalize( A, B, &CUR.GS.projVector ); - - GUESS_VECTOR( freeVector ); - - COMPUTE_Funcs(); - } - - - /*************************************************************************/ - /* */ - /* SZP0[]: Set Zone Pointer 0 */ - /* Opcode range: 0x13 */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_SZP0( INS_ARG ) - { - switch ( (FT_Int)args[0] ) - { - case 0: - CUR.zp0 = CUR.twilight; - break; - - case 1: - CUR.zp0 = CUR.pts; - break; - - default: - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - CUR.GS.gep0 = (FT_UShort)args[0]; - } - - - /*************************************************************************/ - /* */ - /* SZP1[]: Set Zone Pointer 1 */ - /* Opcode range: 0x14 */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_SZP1( INS_ARG ) - { - switch ( (FT_Int)args[0] ) - { - case 0: - CUR.zp1 = CUR.twilight; - break; - - case 1: - CUR.zp1 = CUR.pts; - break; - - default: - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - CUR.GS.gep1 = (FT_UShort)args[0]; - } - - - /*************************************************************************/ - /* */ - /* SZP2[]: Set Zone Pointer 2 */ - /* Opcode range: 0x15 */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_SZP2( INS_ARG ) - { - switch ( (FT_Int)args[0] ) - { - case 0: - CUR.zp2 = CUR.twilight; - break; - - case 1: - CUR.zp2 = CUR.pts; - break; - - default: - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - CUR.GS.gep2 = (FT_UShort)args[0]; - } - - - /*************************************************************************/ - /* */ - /* SZPS[]: Set Zone PointerS */ - /* Opcode range: 0x16 */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_SZPS( INS_ARG ) - { - switch ( (FT_Int)args[0] ) - { - case 0: - CUR.zp0 = CUR.twilight; - break; - - case 1: - CUR.zp0 = CUR.pts; - break; - - default: - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - CUR.zp1 = CUR.zp0; - CUR.zp2 = CUR.zp0; - - CUR.GS.gep0 = (FT_UShort)args[0]; - CUR.GS.gep1 = (FT_UShort)args[0]; - CUR.GS.gep2 = (FT_UShort)args[0]; - } - - - /*************************************************************************/ - /* */ - /* INSTCTRL[]: INSTruction ConTRoL */ - /* Opcode range: 0x8e */ - /* Stack: int32 int32 --> */ - /* */ - static void - Ins_INSTCTRL( INS_ARG ) - { - FT_Long K, L; - - - K = args[1]; - L = args[0]; - - if ( K < 1 || K > 2 ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - if ( L != 0 ) - L = K; - - CUR.GS.instruct_control = FT_BOOL( - ( (FT_Byte)CUR.GS.instruct_control & ~(FT_Byte)K ) | (FT_Byte)L ); - } - - - /*************************************************************************/ - /* */ - /* SCANCTRL[]: SCAN ConTRoL */ - /* Opcode range: 0x85 */ - /* Stack: uint32? --> */ - /* */ - static void - Ins_SCANCTRL( INS_ARG ) - { - FT_Int A; - - - /* Get Threshold */ - A = (FT_Int)( args[0] & 0xFF ); - - if ( A == 0xFF ) - { - CUR.GS.scan_control = TRUE; - return; - } - else if ( A == 0 ) - { - CUR.GS.scan_control = FALSE; - return; - } - - if ( ( args[0] & 0x100 ) != 0 && CUR.tt_metrics.ppem <= A ) - CUR.GS.scan_control = TRUE; - - if ( ( args[0] & 0x200 ) != 0 && CUR.tt_metrics.rotated ) - CUR.GS.scan_control = TRUE; - - if ( ( args[0] & 0x400 ) != 0 && CUR.tt_metrics.stretched ) - CUR.GS.scan_control = TRUE; - - if ( ( args[0] & 0x800 ) != 0 && CUR.tt_metrics.ppem > A ) - CUR.GS.scan_control = FALSE; - - if ( ( args[0] & 0x1000 ) != 0 && CUR.tt_metrics.rotated ) - CUR.GS.scan_control = FALSE; - - if ( ( args[0] & 0x2000 ) != 0 && CUR.tt_metrics.stretched ) - CUR.GS.scan_control = FALSE; - } - - - /*************************************************************************/ - /* */ - /* SCANTYPE[]: SCAN TYPE */ - /* Opcode range: 0x8D */ - /* Stack: uint32? --> */ - /* */ - static void - Ins_SCANTYPE( INS_ARG ) - { - if ( args[0] >= 0 ) - CUR.GS.scan_type = (FT_Int)args[0]; - } - - - /*************************************************************************/ - /* */ - /* MANAGING OUTLINES */ - /* */ - /* Instructions appear in the specification's order. */ - /* */ - /*************************************************************************/ - - - /*************************************************************************/ - /* */ - /* FLIPPT[]: FLIP PoinT */ - /* Opcode range: 0x80 */ - /* Stack: uint32... --> */ - /* */ - static void - Ins_FLIPPT( INS_ARG ) - { - FT_UShort point; - - FT_UNUSED_ARG; - - - if ( CUR.top < CUR.GS.loop ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Too_Few_Arguments ); - goto Fail; - } - - while ( CUR.GS.loop > 0 ) - { - CUR.args--; - - point = (FT_UShort)CUR.stack[CUR.args]; - - if ( BOUNDS( point, CUR.pts.n_points ) ) - { - if ( CUR.pedantic_hinting ) - { - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - } - else - CUR.pts.tags[point] ^= FT_CURVE_TAG_ON; - - CUR.GS.loop--; - } - - Fail: - CUR.GS.loop = 1; - CUR.new_top = CUR.args; - } - - - /*************************************************************************/ - /* */ - /* FLIPRGON[]: FLIP RanGe ON */ - /* Opcode range: 0x81 */ - /* Stack: uint32 uint32 --> */ - /* */ - static void - Ins_FLIPRGON( INS_ARG ) - { - FT_UShort I, K, L; - - - K = (FT_UShort)args[1]; - L = (FT_UShort)args[0]; - - if ( BOUNDS( K, CUR.pts.n_points ) || - BOUNDS( L, CUR.pts.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - for ( I = L; I <= K; I++ ) - CUR.pts.tags[I] |= FT_CURVE_TAG_ON; - } - - - /*************************************************************************/ - /* */ - /* FLIPRGOFF: FLIP RanGe OFF */ - /* Opcode range: 0x82 */ - /* Stack: uint32 uint32 --> */ - /* */ - static void - Ins_FLIPRGOFF( INS_ARG ) - { - FT_UShort I, K, L; - - - K = (FT_UShort)args[1]; - L = (FT_UShort)args[0]; - - if ( BOUNDS( K, CUR.pts.n_points ) || - BOUNDS( L, CUR.pts.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - for ( I = L; I <= K; I++ ) - CUR.pts.tags[I] &= ~FT_CURVE_TAG_ON; - } - - - static FT_Bool - Compute_Point_Displacement( EXEC_OP_ FT_F26Dot6* x, - FT_F26Dot6* y, - TT_GlyphZone zone, - FT_UShort* refp ) - { - TT_GlyphZoneRec zp; - FT_UShort p; - FT_F26Dot6 d; - - - if ( CUR.opcode & 1 ) - { - zp = CUR.zp0; - p = CUR.GS.rp1; - } - else - { - zp = CUR.zp1; - p = CUR.GS.rp2; - } - - if ( BOUNDS( p, zp.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - *refp = 0; - return FAILURE; - } - - *zone = zp; - *refp = p; - - d = CUR_Func_project( zp.cur + p, zp.org + p ); - -#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING - if ( CUR.face->unpatented_hinting ) - { - if ( CUR.GS.both_x_axis ) - { - *x = d; - *y = 0; - } - else - { - *x = 0; - *y = d; - } - } - else -#endif - { - *x = FT_MulDiv( d, (FT_Long)CUR.GS.freeVector.x, CUR.F_dot_P ); - *y = FT_MulDiv( d, (FT_Long)CUR.GS.freeVector.y, CUR.F_dot_P ); - } - - return SUCCESS; - } - - - static void - Move_Zp2_Point( EXEC_OP_ FT_UShort point, - FT_F26Dot6 dx, - FT_F26Dot6 dy, - FT_Bool touch ) - { -#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING - if ( CUR.face->unpatented_hinting ) - { - if ( CUR.GS.both_x_axis ) - { - CUR.zp2.cur[point].x += dx; - if ( touch ) - CUR.zp2.tags[point] |= FT_CURVE_TAG_TOUCH_X; - } - else - { - CUR.zp2.cur[point].y += dy; - if ( touch ) - CUR.zp2.tags[point] |= FT_CURVE_TAG_TOUCH_Y; - } - return; - } -#endif - - if (CUR.zp2.cur == NULL) return; /* Security fix: Google Chris6 ufuzz109.pdf page #1 */ - if ( CUR.GS.freeVector.x != 0 ) - { - CUR.zp2.cur[point].x += dx; - if ( touch ) - CUR.zp2.tags[point] |= FT_CURVE_TAG_TOUCH_X; - } - - if ( CUR.GS.freeVector.y != 0 ) - { - CUR.zp2.cur[point].y += dy; - if ( touch ) - CUR.zp2.tags[point] |= FT_CURVE_TAG_TOUCH_Y; - } - } - - - /*************************************************************************/ - /* */ - /* SHP[a]: SHift Point by the last point */ - /* Opcode range: 0x32-0x33 */ - /* Stack: uint32... --> */ - /* */ - static void - Ins_SHP( INS_ARG ) - { - TT_GlyphZoneRec zp; - FT_UShort refp; - - FT_F26Dot6 dx, - dy; - FT_UShort point; - - FT_UNUSED_ARG; - - - if ( CUR.top < CUR.GS.loop ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - goto Fail; - } - - if ( COMPUTE_Point_Displacement( &dx, &dy, &zp, &refp ) ) - return; - - while ( CUR.GS.loop > 0 ) - { - CUR.args--; - point = (FT_UShort)CUR.stack[CUR.args]; - - if ( BOUNDS( point, CUR.zp2.n_points ) ) - { - if ( CUR.pedantic_hinting ) - { - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - } - else -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - /* doesn't follow Cleartype spec but produces better result */ - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode ) - MOVE_Zp2_Point( point, 0, dy, TRUE ); - else -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - MOVE_Zp2_Point( point, dx, dy, TRUE ); - - CUR.GS.loop--; - } - - Fail: - CUR.GS.loop = 1; - CUR.new_top = CUR.args; - } - - - /*************************************************************************/ - /* */ - /* SHC[a]: SHift Contour */ - /* Opcode range: 0x34-35 */ - /* Stack: uint32 --> */ - /* */ - /* UNDOCUMENTED: According to Greg Hitchcock, there is one (virtual) */ - /* contour in the twilight zone, namely contour number */ - /* zero which includes all points of it. */ - /* */ - static void - Ins_SHC( INS_ARG ) - { - TT_GlyphZoneRec zp; - FT_UShort refp; - FT_F26Dot6 dx, dy; - - FT_Short contour, bounds; - FT_UShort start, limit, i; - - - contour = (FT_UShort)args[0]; - bounds = ( CUR.GS.gep2 == 0 ) ? 1 : CUR.zp2.n_contours; - - if ( BOUNDS( contour, bounds ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - if ( COMPUTE_Point_Displacement( &dx, &dy, &zp, &refp ) ) - return; - - if ( contour == 0 ) - start = 0; - else - start = (FT_UShort)( CUR.zp2.contours[contour - 1] + 1 - - CUR.zp2.first_point ); - - /* we use the number of points if in the twilight zone */ - if ( CUR.GS.gep2 == 0 ) - limit = CUR.zp2.n_points; - else - limit = (FT_UShort)( CUR.zp2.contours[contour] - - CUR.zp2.first_point + 1 ); - - for ( i = start; i < limit; i++ ) - { - if ( zp.cur != CUR.zp2.cur || refp != i ) - MOVE_Zp2_Point( i, dx, dy, TRUE ); - } - } - - - /*************************************************************************/ - /* */ - /* SHZ[a]: SHift Zone */ - /* Opcode range: 0x36-37 */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_SHZ( INS_ARG ) - { - TT_GlyphZoneRec zp; - FT_UShort refp; - FT_F26Dot6 dx, - dy; - - FT_UShort limit, i; - - - if ( BOUNDS( args[0], 2 ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - if ( COMPUTE_Point_Displacement( &dx, &dy, &zp, &refp ) ) - return; - - /* XXX: UNDOCUMENTED! SHZ doesn't move the phantom points. */ - /* Twilight zone has no real contours, so use `n_points'. */ - /* Normal zone's `n_points' includes phantoms, so must */ - /* use end of last contour. */ - if ( CUR.GS.gep2 == 0 ) - limit = (FT_UShort)CUR.zp2.n_points; - else if ( CUR.GS.gep2 == 1 && CUR.zp2.n_contours > 0 ) { - limit = (FT_UShort)( CUR.zp2.contours[CUR.zp2.n_contours - 1] + 1 ); - if (limit >= CUR.zp2.n_points) /* XYQ 2010-10-01: security fix: validate last point index */ - limit = CUR.zp2.n_points - 1; - } - else - limit = 0; - - /* XXX: UNDOCUMENTED! SHZ doesn't touch the points */ - for ( i = 0; i < limit; i++ ) - { - if ( zp.cur != CUR.zp2.cur || refp != i ) - MOVE_Zp2_Point( i, dx, dy, FALSE ); - } - } - - - /*************************************************************************/ - /* */ - /* SHPIX[]: SHift points by a PIXel amount */ - /* Opcode range: 0x38 */ - /* Stack: f26.6 uint32... --> */ - /* */ - static void - Ins_SHPIX( INS_ARG ) - { - FT_F26Dot6 dx, dy; - FT_UShort point; -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - FT_Int B1, B2; -#endif - - - if ( CUR.top < CUR.GS.loop + 1 ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - goto Fail; - } - -#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING - if ( CUR.face->unpatented_hinting ) - { - if ( CUR.GS.both_x_axis ) - { - dx = (FT_UInt32)args[0]; - dy = 0; - } - else - { - dx = 0; - dy = (FT_UInt32)args[0]; - } - } - else -#endif - { - dx = TT_MulFix14( (FT_UInt32)args[0], CUR.GS.freeVector.x ); - dy = TT_MulFix14( (FT_UInt32)args[0], CUR.GS.freeVector.y ); - } - - while ( CUR.GS.loop > 0 ) - { - CUR.args--; - - point = (FT_UShort)CUR.stack[CUR.args]; - - if ( BOUNDS( point, CUR.zp2.n_points ) ) - { - if ( CUR.pedantic_hinting ) - { - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - } - else -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - { - /* If not using ignore_x_mode rendering, allow ZP2 move. */ - /* If inline deltas aren't allowed, skip ZP2 move. */ - /* If using ignore_x_mode rendering, allow ZP2 point move if: */ - /* - freedom vector is y and sph_compatibility_mode is off */ - /* - the glyph is composite and the move is in the Y direction */ - /* - the glyph is specifically set to allow SHPIX moves */ - /* - the move is on a previously Y-touched point */ - - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode ) - { - /* save point for later comparison */ - if ( CUR.GS.freeVector.y != 0 ) - B1 = CUR.zp2.cur[point].y; - else - B1 = CUR.zp2.cur[point].x; - - if ( !CUR.face->sph_compatibility_mode && - CUR.GS.freeVector.y != 0 ) - { - MOVE_Zp2_Point( point, dx, dy, TRUE ); - - /* save new point */ - if ( CUR.GS.freeVector.y != 0 ) - { - B2 = CUR.zp2.cur[point].y; - - /* reverse any disallowed moves */ - if ( ( CUR.sph_tweak_flags & SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES ) && - ( B1 & 63 ) != 0 && - ( B2 & 63 ) != 0 && - B1 != B2 ) - MOVE_Zp2_Point( point, -dx, -dy, TRUE ); - } - } - else if ( CUR.face->sph_compatibility_mode ) - { - if ( CUR.sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES ) - { - dx = FT_PIX_ROUND( B1 + dx ) - B1; - dy = FT_PIX_ROUND( B1 + dy ) - B1; - } - - /* skip post-iup deltas */ - if ( CUR.iup_called && - ( ( CUR.sph_in_func_flags & SPH_FDEF_INLINE_DELTA_1 ) || - ( CUR.sph_in_func_flags & SPH_FDEF_INLINE_DELTA_2 ) ) ) - goto Skip; - - if ( !( CUR.sph_tweak_flags & SPH_TWEAK_ALWAYS_SKIP_DELTAP ) && - ( ( CUR.is_composite && CUR.GS.freeVector.y != 0 ) || - ( CUR.zp2.tags[point] & FT_CURVE_TAG_TOUCH_Y ) || - ( CUR.sph_tweak_flags & SPH_TWEAK_DO_SHPIX ) ) ) - MOVE_Zp2_Point( point, 0, dy, TRUE ); - - /* save new point */ - if ( CUR.GS.freeVector.y != 0 ) - { - B2 = CUR.zp2.cur[point].y; - - /* reverse any disallowed moves */ - if ( ( B1 & 63 ) == 0 && - ( B2 & 63 ) != 0 && - B1 != B2 ) - MOVE_Zp2_Point( point, 0, -dy, TRUE ); - } - } - else if ( CUR.sph_in_func_flags & SPH_FDEF_TYPEMAN_DIAGENDCTRL ) - MOVE_Zp2_Point( point, dx, dy, TRUE ); - } - else - MOVE_Zp2_Point( point, dx, dy, TRUE ); - } - - Skip: - -#else /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - MOVE_Zp2_Point( point, dx, dy, TRUE ); - -#endif /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - CUR.GS.loop--; - } - - Fail: - CUR.GS.loop = 1; - CUR.new_top = CUR.args; - } - - - /*************************************************************************/ - /* */ - /* MSIRP[a]: Move Stack Indirect Relative Position */ - /* Opcode range: 0x3A-0x3B */ - /* Stack: f26.6 uint32 --> */ - /* */ - static void - Ins_MSIRP( INS_ARG ) - { - FT_UShort point; - FT_F26Dot6 distance; - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - FT_F26Dot6 control_value_cutin = 0; /* pacify compiler */ - - - if ( SUBPIXEL_HINTING ) - { - control_value_cutin = CUR.GS.control_value_cutin; - - if ( CUR.ignore_x_mode && - CUR.GS.freeVector.x != 0 && - !( CUR.sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) ) - control_value_cutin = 0; - } - -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - point = (FT_UShort)args[0]; - - if ( BOUNDS( point, CUR.zp1.n_points ) || - BOUNDS( CUR.GS.rp0, CUR.zp0.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - /* UNDOCUMENTED! The MS rasterizer does that with */ - /* twilight points (confirmed by Greg Hitchcock) */ - if ( CUR.GS.gep1 == 0 ) - { - CUR.zp1.org[point] = CUR.zp0.org[CUR.GS.rp0]; - CUR_Func_move_orig( &CUR.zp1, point, args[1] ); - CUR.zp1.cur[point] = CUR.zp1.org[point]; - } - - distance = CUR_Func_project( CUR.zp1.cur + point, - CUR.zp0.cur + CUR.GS.rp0 ); - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - /* subpixel hinting - make MSIRP respect CVT cut-in; */ - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && - CUR.GS.freeVector.x != 0 && - FT_ABS( distance - args[1] ) >= control_value_cutin ) - distance = args[1]; -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - CUR_Func_move( &CUR.zp1, point, args[1] - distance ); - - CUR.GS.rp1 = CUR.GS.rp0; - CUR.GS.rp2 = point; - - if ( ( CUR.opcode & 1 ) != 0 ) - CUR.GS.rp0 = point; - } - - - /*************************************************************************/ - /* */ - /* MDAP[a]: Move Direct Absolute Point */ - /* Opcode range: 0x2E-0x2F */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_MDAP( INS_ARG ) - { - FT_UShort point; - FT_F26Dot6 cur_dist; - FT_F26Dot6 distance; - - - point = (FT_UShort)args[0]; - - if ( BOUNDS( point, CUR.zp0.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - if ( ( CUR.opcode & 1 ) != 0 ) - { - cur_dist = CUR_fast_project( &CUR.zp0.cur[point] ); -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && - CUR.GS.freeVector.x != 0 ) - distance = ROUND_None( - cur_dist, - CUR.tt_metrics.compensations[0] ) - cur_dist; - else -#endif - distance = CUR_Func_round( - cur_dist, - CUR.tt_metrics.compensations[0] ) - cur_dist; - } - else - distance = 0; - - CUR_Func_move( &CUR.zp0, point, distance ); - - CUR.GS.rp0 = point; - CUR.GS.rp1 = point; - } - - - /*************************************************************************/ - /* */ - /* MIAP[a]: Move Indirect Absolute Point */ - /* Opcode range: 0x3E-0x3F */ - /* Stack: uint32 uint32 --> */ - /* */ - static void - Ins_MIAP( INS_ARG ) - { - FT_ULong cvtEntry; - FT_UShort point; - FT_F26Dot6 distance; - FT_F26Dot6 org_dist; - FT_F26Dot6 control_value_cutin; - - - control_value_cutin = CUR.GS.control_value_cutin; - cvtEntry = (FT_ULong)args[1]; - point = (FT_UShort)args[0]; - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && - CUR.GS.freeVector.x != 0 && - CUR.GS.freeVector.y == 0 && - !( CUR.sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) ) - control_value_cutin = 0; -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - if ( BOUNDS( point, CUR.zp0.n_points ) || - BOUNDSL( cvtEntry, CUR.cvtSize ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - goto Fail; - } - - /* UNDOCUMENTED! */ - /* */ - /* The behaviour of an MIAP instruction is quite different when used */ - /* in the twilight zone. */ - /* */ - /* First, no control value cut-in test is performed as it would fail */ - /* anyway. Second, the original point, i.e. (org_x,org_y) of */ - /* zp0.point, is set to the absolute, unrounded distance found in the */ - /* CVT. */ - /* */ - /* This is used in the CVT programs of the Microsoft fonts Arial, */ - /* Times, etc., in order to re-adjust some key font heights. It */ - /* allows the use of the IP instruction in the twilight zone, which */ - /* otherwise would be invalid according to the specification. */ - /* */ - /* We implement it with a special sequence for the twilight zone. */ - /* This is a bad hack, but it seems to work. */ - /* */ - /* Confirmed by Greg Hitchcock. */ - - distance = CUR_Func_read_cvt( cvtEntry ); - - if ( CUR.GS.gep0 == 0 ) /* If in twilight zone */ - { -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - /* Only adjust if not in sph_compatibility_mode or ignore_x_mode. */ - /* Determined via experimentation and may be incorrect... */ - if ( !SUBPIXEL_HINTING || - ( !CUR.ignore_x_mode || - !CUR.face->sph_compatibility_mode ) ) -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - CUR.zp0.org[point].x = TT_MulFix14( (FT_UInt32)distance, - CUR.GS.freeVector.x ); - CUR.zp0.org[point].y = TT_MulFix14( (FT_UInt32)distance, - CUR.GS.freeVector.y ), - CUR.zp0.cur[point] = CUR.zp0.org[point]; - } -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && - ( CUR.sph_tweak_flags & SPH_TWEAK_MIAP_HACK ) && - distance > 0 && - CUR.GS.freeVector.y != 0 ) - distance = 0; -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - org_dist = CUR_fast_project( &CUR.zp0.cur[point] ); - - if ( ( CUR.opcode & 1 ) != 0 ) /* rounding and control cut-in flag */ - { - if ( FT_ABS( distance - org_dist ) > control_value_cutin ) - distance = org_dist; - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && - CUR.GS.freeVector.x != 0 ) - distance = ROUND_None( distance, - CUR.tt_metrics.compensations[0] ); - else -#endif - distance = CUR_Func_round( distance, - CUR.tt_metrics.compensations[0] ); - } - - CUR_Func_move( &CUR.zp0, point, distance - org_dist ); - - Fail: - CUR.GS.rp0 = point; - CUR.GS.rp1 = point; - } - - - /*************************************************************************/ - /* */ - /* MDRP[abcde]: Move Direct Relative Point */ - /* Opcode range: 0xC0-0xDF */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_MDRP( INS_ARG ) - { - FT_UShort point; - FT_F26Dot6 org_dist, distance, minimum_distance; - - - minimum_distance = CUR.GS.minimum_distance; - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && - CUR.GS.freeVector.x != 0 && - !( CUR.sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) ) - minimum_distance = 0; -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - point = (FT_UShort)args[0]; - - if ( BOUNDS( point, CUR.zp1.n_points ) || - BOUNDS( CUR.GS.rp0, CUR.zp0.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - goto Fail; - } - - /* XXX: Is there some undocumented feature while in the */ - /* twilight zone? */ - - /* XXX: UNDOCUMENTED: twilight zone special case */ - - if ( CUR.GS.gep0 == 0 || CUR.GS.gep1 == 0 ) - { - FT_Vector* vec1 = &CUR.zp1.org[point]; - FT_Vector* vec2 = &CUR.zp0.org[CUR.GS.rp0]; - - - org_dist = CUR_Func_dualproj( vec1, vec2 ); - } - else - { - FT_Vector* vec1 = &CUR.zp1.orus[point]; - FT_Vector* vec2 = &CUR.zp0.orus[CUR.GS.rp0]; - - - if ( CUR.metrics.x_scale == CUR.metrics.y_scale ) - { - /* this should be faster */ - org_dist = CUR_Func_dualproj( vec1, vec2 ); - org_dist = FT_MulFix( org_dist, CUR.metrics.x_scale ); - } - else - { - FT_Vector vec; - - - vec.x = FT_MulFix( vec1->x - vec2->x, CUR.metrics.x_scale ); - vec.y = FT_MulFix( vec1->y - vec2->y, CUR.metrics.y_scale ); - - org_dist = CUR_fast_dualproj( &vec ); - } - } - - /* single width cut-in test */ - - if ( FT_ABS( org_dist - CUR.GS.single_width_value ) < - CUR.GS.single_width_cutin ) - { - if ( org_dist >= 0 ) - org_dist = CUR.GS.single_width_value; - else - org_dist = -CUR.GS.single_width_value; - } - - /* round flag */ - - if ( ( CUR.opcode & 4 ) != 0 ) - { -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && - CUR.GS.freeVector.x != 0 ) - distance = ROUND_None( - org_dist, - CUR.tt_metrics.compensations[CUR.opcode & 3] ); - else -#endif - distance = CUR_Func_round( - org_dist, - CUR.tt_metrics.compensations[CUR.opcode & 3] ); - } - else - distance = ROUND_None( - org_dist, - CUR.tt_metrics.compensations[CUR.opcode & 3] ); - - /* minimum distance flag */ - - if ( ( CUR.opcode & 8 ) != 0 ) - { - if ( org_dist >= 0 ) - { - if ( distance < minimum_distance ) - distance = minimum_distance; - } - else - { - if ( distance > -minimum_distance ) - distance = -minimum_distance; - } - } - - /* now move the point */ - - org_dist = CUR_Func_project( CUR.zp1.cur + point, - CUR.zp0.cur + CUR.GS.rp0 ); - - CUR_Func_move( &CUR.zp1, point, distance - org_dist ); - - Fail: - CUR.GS.rp1 = CUR.GS.rp0; - CUR.GS.rp2 = point; - - if ( ( CUR.opcode & 16 ) != 0 ) - CUR.GS.rp0 = point; - } - - - /*************************************************************************/ - /* */ - /* MIRP[abcde]: Move Indirect Relative Point */ - /* Opcode range: 0xE0-0xFF */ - /* Stack: int32? uint32 --> */ - /* */ - static void - Ins_MIRP( INS_ARG ) - { - FT_UShort point; - FT_ULong cvtEntry; - - FT_F26Dot6 cvt_dist, - distance, - cur_dist, - org_dist, - control_value_cutin, - minimum_distance; -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - FT_Int B1 = 0; /* pacify compiler */ - FT_Int B2 = 0; - FT_Bool reverse_move = FALSE; -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - - minimum_distance = CUR.GS.minimum_distance; - control_value_cutin = CUR.GS.control_value_cutin; - point = (FT_UShort)args[0]; - cvtEntry = (FT_ULong)( args[1] + 1 ); - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && - CUR.GS.freeVector.x != 0 && - !( CUR.sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) ) - control_value_cutin = minimum_distance = 0; -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - /* XXX: UNDOCUMENTED! cvt[-1] = 0 always */ - /* Security fix: Google 07_oobread4.pdf page #1, cvtEntry > CUR.cvtSize + 1 will cause array index oob. */ - if ( BOUNDS( point, CUR.zp1.n_points ) || - BOUNDS( cvtEntry, CUR.cvtSize + 1 ) || - BOUNDS( CUR.GS.rp0, CUR.zp0.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - goto Fail; - } - - if ( !cvtEntry ) - cvt_dist = 0; - else - cvt_dist = CUR_Func_read_cvt( cvtEntry - 1 ); - - /* single width test */ - - if ( FT_ABS( cvt_dist - CUR.GS.single_width_value ) < - CUR.GS.single_width_cutin ) - { - if ( cvt_dist >= 0 ) - cvt_dist = CUR.GS.single_width_value; - else - cvt_dist = -CUR.GS.single_width_value; - } - - /* UNDOCUMENTED! The MS rasterizer does that with */ - /* twilight points (confirmed by Greg Hitchcock) */ - if ( CUR.GS.gep1 == 0 ) - { - CUR.zp1.org[point].x = CUR.zp0.org[CUR.GS.rp0].x + - TT_MulFix14( (FT_UInt32)cvt_dist, - CUR.GS.freeVector.x ); - CUR.zp1.org[point].y = CUR.zp0.org[CUR.GS.rp0].y + - TT_MulFix14( (FT_UInt32)cvt_dist, - CUR.GS.freeVector.y ); - CUR.zp1.cur[point] = CUR.zp1.org[point]; - } - - org_dist = CUR_Func_dualproj( &CUR.zp1.org[point], - &CUR.zp0.org[CUR.GS.rp0] ); - cur_dist = CUR_Func_project ( &CUR.zp1.cur[point], - &CUR.zp0.cur[CUR.GS.rp0] ); - - /* auto-flip test */ - - if ( CUR.GS.auto_flip ) - { - if ( ( org_dist ^ cvt_dist ) < 0 ) - cvt_dist = -cvt_dist; - } - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && - CUR.GS.freeVector.y != 0 && - ( CUR.sph_tweak_flags & SPH_TWEAK_TIMES_NEW_ROMAN_HACK ) ) - { - if ( cur_dist < -64 ) - cvt_dist -= 16; - else if ( cur_dist > 64 && cur_dist < 84 ) - cvt_dist += 32; - } -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - /* control value cut-in and round */ - - if ( ( CUR.opcode & 4 ) != 0 ) - { - /* XXX: UNDOCUMENTED! Only perform cut-in test when both points */ - /* refer to the same zone. */ - - if ( CUR.GS.gep0 == CUR.GS.gep1 ) - { - /* XXX: According to Greg Hitchcock, the following wording is */ - /* the right one: */ - /* */ - /* When the absolute difference between the value in */ - /* the table [CVT] and the measurement directly from */ - /* the outline is _greater_ than the cut_in value, the */ - /* outline measurement is used. */ - /* */ - /* This is from `instgly.doc'. The description in */ - /* `ttinst2.doc', version 1.66, is thus incorrect since */ - /* it implies `>=' instead of `>'. */ - - if ( FT_ABS( cvt_dist - org_dist ) > control_value_cutin ) - cvt_dist = org_dist; - } - - distance = CUR_Func_round( - cvt_dist, - CUR.tt_metrics.compensations[CUR.opcode & 3] ); - } - else - { - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - /* do cvt cut-in always in MIRP for sph */ - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && - CUR.GS.gep0 == CUR.GS.gep1 ) - { - if ( FT_ABS( cvt_dist - org_dist ) > control_value_cutin ) - cvt_dist = org_dist; - } -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - distance = ROUND_None( - cvt_dist, - CUR.tt_metrics.compensations[CUR.opcode & 3] ); - } - - /* minimum distance test */ - - if ( ( CUR.opcode & 8 ) != 0 ) - { - if ( org_dist >= 0 ) - { - if ( distance < minimum_distance ) - distance = minimum_distance; - } - else - { - if ( distance > -minimum_distance ) - distance = -minimum_distance; - } - } - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( SUBPIXEL_HINTING ) - { - B1 = CUR.zp1.cur[point].y; - - /* Round moves if necessary */ - if ( CUR.ignore_x_mode && - CUR.GS.freeVector.y != 0 && - ( CUR.sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES ) ) - distance = FT_PIX_ROUND( B1 + distance - cur_dist ) - B1 + cur_dist; - - if ( CUR.ignore_x_mode && - CUR.GS.freeVector.y != 0 && - ( CUR.opcode & 16 ) == 0 && - ( CUR.opcode & 8 ) == 0 && - ( CUR.sph_tweak_flags & SPH_TWEAK_COURIER_NEW_2_HACK ) ) - distance += 64; - } -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - CUR_Func_move( &CUR.zp1, point, distance - cur_dist ); - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( SUBPIXEL_HINTING ) - { - B2 = CUR.zp1.cur[point].y; - - /* Reverse move if necessary */ - if ( CUR.ignore_x_mode ) - { - if ( CUR.face->sph_compatibility_mode && - CUR.GS.freeVector.y != 0 && - ( B1 & 63 ) == 0 && - ( B2 & 63 ) != 0 ) - reverse_move = TRUE; - - if ( ( CUR.sph_tweak_flags & SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES ) && - CUR.GS.freeVector.y != 0 && - ( B2 & 63 ) != 0 && - ( B1 & 63 ) != 0 ) - reverse_move = TRUE; - } - - if ( reverse_move ) - CUR_Func_move( &CUR.zp1, point, -( distance - cur_dist ) ); - } - -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - Fail: - CUR.GS.rp1 = CUR.GS.rp0; - - if ( ( CUR.opcode & 16 ) != 0 ) - CUR.GS.rp0 = point; - - CUR.GS.rp2 = point; - } - - - /*************************************************************************/ - /* */ - /* ALIGNRP[]: ALIGN Relative Point */ - /* Opcode range: 0x3C */ - /* Stack: uint32 uint32... --> */ - /* */ - static void - Ins_ALIGNRP( INS_ARG ) - { - FT_UShort point; - FT_F26Dot6 distance; - - FT_UNUSED_ARG; - - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && - CUR.iup_called && - ( CUR.sph_tweak_flags & SPH_TWEAK_NO_ALIGNRP_AFTER_IUP ) ) - { - CUR.error = FT_THROW( Invalid_Reference ); - goto Fail; - } -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - if ( CUR.top < CUR.GS.loop || - BOUNDS( CUR.GS.rp0, CUR.zp0.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - goto Fail; - } - - while ( CUR.GS.loop > 0 ) - { - CUR.args--; - - point = (FT_UShort)CUR.stack[CUR.args]; - - if ( BOUNDS( point, CUR.zp1.n_points ) ) - { - if ( CUR.pedantic_hinting ) - { - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - } - else - { - distance = CUR_Func_project( CUR.zp1.cur + point, - CUR.zp0.cur + CUR.GS.rp0 ); - - CUR_Func_move( &CUR.zp1, point, -distance ); - } - - CUR.GS.loop--; - } - - Fail: - CUR.GS.loop = 1; - CUR.new_top = CUR.args; - } - - - /*************************************************************************/ - /* */ - /* ISECT[]: moves point to InterSECTion */ - /* Opcode range: 0x0F */ - /* Stack: 5 * uint32 --> */ - /* */ - static void - Ins_ISECT( INS_ARG ) - { - FT_UShort point, - a0, a1, - b0, b1; - - FT_F26Dot6 discriminant, dotproduct; - - FT_F26Dot6 dx, dy, - dax, day, - dbx, dby; - - FT_F26Dot6 val; - - FT_Vector R; - - - point = (FT_UShort)args[0]; - - a0 = (FT_UShort)args[1]; - a1 = (FT_UShort)args[2]; - b0 = (FT_UShort)args[3]; - b1 = (FT_UShort)args[4]; - - if ( BOUNDS( b0, CUR.zp0.n_points ) || - BOUNDS( b1, CUR.zp0.n_points ) || - BOUNDS( a0, CUR.zp1.n_points ) || - BOUNDS( a1, CUR.zp1.n_points ) || - BOUNDS( point, CUR.zp2.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - /* Cramer's rule */ - - dbx = CUR.zp0.cur[b1].x - CUR.zp0.cur[b0].x; - dby = CUR.zp0.cur[b1].y - CUR.zp0.cur[b0].y; - - dax = CUR.zp1.cur[a1].x - CUR.zp1.cur[a0].x; - day = CUR.zp1.cur[a1].y - CUR.zp1.cur[a0].y; - - dx = CUR.zp0.cur[b0].x - CUR.zp1.cur[a0].x; - dy = CUR.zp0.cur[b0].y - CUR.zp1.cur[a0].y; - - CUR.zp2.tags[point] |= FT_CURVE_TAG_TOUCH_BOTH; - - discriminant = FT_MulDiv( dax, -dby, 0x40 ) + - FT_MulDiv( day, dbx, 0x40 ); - dotproduct = FT_MulDiv( dax, dbx, 0x40 ) + - FT_MulDiv( day, dby, 0x40 ); - - /* The discriminant above is actually a cross product of vectors */ - /* da and db. Together with the dot product, they can be used as */ - /* surrogates for sine and cosine of the angle between the vectors. */ - /* Indeed, */ - /* dotproduct = |da||db|cos(angle) */ - /* discriminant = |da||db|sin(angle) . */ - /* We use these equations to reject grazing intersections by */ - /* thresholding abs(tan(angle)) at 1/19, corresponding to 3 degrees. */ - if ( 19 * FT_ABS( discriminant ) > FT_ABS( dotproduct ) ) - { - val = FT_MulDiv( dx, -dby, 0x40 ) + FT_MulDiv( dy, dbx, 0x40 ); - - R.x = FT_MulDiv( val, dax, discriminant ); - R.y = FT_MulDiv( val, day, discriminant ); - - CUR.zp2.cur[point].x = CUR.zp1.cur[a0].x + R.x; - CUR.zp2.cur[point].y = CUR.zp1.cur[a0].y + R.y; - } - else - { - /* else, take the middle of the middles of A and B */ - - CUR.zp2.cur[point].x = ( CUR.zp1.cur[a0].x + - CUR.zp1.cur[a1].x + - CUR.zp0.cur[b0].x + - CUR.zp0.cur[b1].x ) / 4; - CUR.zp2.cur[point].y = ( CUR.zp1.cur[a0].y + - CUR.zp1.cur[a1].y + - CUR.zp0.cur[b0].y + - CUR.zp0.cur[b1].y ) / 4; - } - } - - - /*************************************************************************/ - /* */ - /* ALIGNPTS[]: ALIGN PoinTS */ - /* Opcode range: 0x27 */ - /* Stack: uint32 uint32 --> */ - /* */ - static void - Ins_ALIGNPTS( INS_ARG ) - { - FT_UShort p1, p2; - FT_F26Dot6 distance; - - - p1 = (FT_UShort)args[0]; - p2 = (FT_UShort)args[1]; - - if ( BOUNDS( p1, CUR.zp1.n_points ) || - BOUNDS( p2, CUR.zp0.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - distance = CUR_Func_project( CUR.zp0.cur + p2, - CUR.zp1.cur + p1 ) / 2; - - CUR_Func_move( &CUR.zp1, p1, distance ); - CUR_Func_move( &CUR.zp0, p2, -distance ); - } - - - /*************************************************************************/ - /* */ - /* IP[]: Interpolate Point */ - /* Opcode range: 0x39 */ - /* Stack: uint32... --> */ - /* */ - - /* SOMETIMES, DUMBER CODE IS BETTER CODE */ - - static void - Ins_IP( INS_ARG ) - { - FT_F26Dot6 old_range, cur_range; - FT_Vector* orus_base; - FT_Vector* cur_base; - FT_Int twilight; - - FT_UNUSED_ARG; - - - if ( CUR.top < CUR.GS.loop ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - goto Fail; - } - - /* - * We need to deal in a special way with the twilight zone. - * Otherwise, by definition, the value of CUR.twilight.orus[n] is (0,0), - * for every n. - */ - twilight = CUR.GS.gep0 == 0 || CUR.GS.gep1 == 0 || CUR.GS.gep2 == 0; - - if ( BOUNDS( CUR.GS.rp1, CUR.zp0.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - goto Fail; - } - - if ( twilight ) - orus_base = &CUR.zp0.org[CUR.GS.rp1]; - else - orus_base = &CUR.zp0.orus[CUR.GS.rp1]; - - cur_base = &CUR.zp0.cur[CUR.GS.rp1]; - - /* XXX: There are some glyphs in some braindead but popular */ - /* fonts out there (e.g. [aeu]grave in monotype.ttf) */ - /* calling IP[] with bad values of rp[12]. */ - /* Do something sane when this odd thing happens. */ - if ( BOUNDS( CUR.GS.rp1, CUR.zp0.n_points ) || - BOUNDS( CUR.GS.rp2, CUR.zp1.n_points ) ) - { - old_range = 0; - cur_range = 0; - } - else - { - if ( twilight ) - old_range = CUR_Func_dualproj( &CUR.zp1.org[CUR.GS.rp2], - orus_base ); - else if ( CUR.metrics.x_scale == CUR.metrics.y_scale ) - old_range = CUR_Func_dualproj( &CUR.zp1.orus[CUR.GS.rp2], - orus_base ); - else - { - FT_Vector vec; - - - vec.x = FT_MulFix( CUR.zp1.orus[CUR.GS.rp2].x - orus_base->x, - CUR.metrics.x_scale ); - vec.y = FT_MulFix( CUR.zp1.orus[CUR.GS.rp2].y - orus_base->y, - CUR.metrics.y_scale ); - - old_range = CUR_fast_dualproj( &vec ); - } - - cur_range = CUR_Func_project ( &CUR.zp1.cur[CUR.GS.rp2], cur_base ); - } - - for ( ; CUR.GS.loop > 0; --CUR.GS.loop ) - { - FT_UInt point = (FT_UInt)CUR.stack[--CUR.args]; - FT_F26Dot6 org_dist, cur_dist, new_dist; - - - /* check point bounds */ - if ( BOUNDS( point, CUR.zp2.n_points ) ) - { - if ( CUR.pedantic_hinting ) - { - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - continue; - } - - if ( twilight ) - org_dist = CUR_Func_dualproj( &CUR.zp2.org[point], orus_base ); - else if ( CUR.metrics.x_scale == CUR.metrics.y_scale ) - org_dist = CUR_Func_dualproj( &CUR.zp2.orus[point], orus_base ); - else - { - FT_Vector vec; - - - vec.x = FT_MulFix( CUR.zp2.orus[point].x - orus_base->x, - CUR.metrics.x_scale ); - vec.y = FT_MulFix( CUR.zp2.orus[point].y - orus_base->y, - CUR.metrics.y_scale ); - - org_dist = CUR_fast_dualproj( &vec ); - } - - cur_dist = CUR_Func_project ( &CUR.zp2.cur[point], cur_base ); - - if ( org_dist ) - { - if ( old_range ) - new_dist = FT_MulDiv( org_dist, cur_range, old_range ); - else - { - /* This is the same as what MS does for the invalid case: */ - /* */ - /* delta = (Original_Pt - Original_RP1) - */ - /* (Current_Pt - Current_RP1) */ - /* */ - /* In FreeType speak: */ - /* */ - /* new_dist = cur_dist - */ - /* org_dist - cur_dist; */ - - new_dist = -org_dist; - } - } - else - new_dist = 0; - - CUR_Func_move( &CUR.zp2, (FT_UShort)point, new_dist - cur_dist ); - } - - Fail: - CUR.GS.loop = 1; - CUR.new_top = CUR.args; - } - - - /*************************************************************************/ - /* */ - /* UTP[a]: UnTouch Point */ - /* Opcode range: 0x29 */ - /* Stack: uint32 --> */ - /* */ - static void - Ins_UTP( INS_ARG ) - { - FT_UShort point; - FT_Byte mask; - - - point = (FT_UShort)args[0]; - - if ( BOUNDS( point, CUR.zp0.n_points ) ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - - mask = 0xFF; - - if ( CUR.GS.freeVector.x != 0 ) - mask &= ~FT_CURVE_TAG_TOUCH_X; - - if ( CUR.GS.freeVector.y != 0 ) - mask &= ~FT_CURVE_TAG_TOUCH_Y; - - CUR.zp0.tags[point] &= mask; - } - - - /* Local variables for Ins_IUP: */ - typedef struct IUP_WorkerRec_ - { - FT_Vector* orgs; /* original and current coordinate */ - FT_Vector* curs; /* arrays */ - FT_Vector* orus; - FT_UInt max_points; - - } IUP_WorkerRec, *IUP_Worker; - - - static void - _iup_worker_shift( IUP_Worker worker, - FT_UInt p1, - FT_UInt p2, - FT_UInt p ) - { - FT_UInt i; - FT_F26Dot6 dx; - - - dx = worker->curs[p].x - worker->orgs[p].x; - if ( dx != 0 ) - { - for ( i = p1; i < p; i++ ) - worker->curs[i].x += dx; - - for ( i = p + 1; i <= p2; i++ ) - worker->curs[i].x += dx; - } - } - - - static void - _iup_worker_interpolate( IUP_Worker worker, - FT_UInt p1, - FT_UInt p2, - FT_UInt ref1, - FT_UInt ref2 ) - { - FT_UInt i; - FT_F26Dot6 orus1, orus2, org1, org2, delta1, delta2; - - - if ( p1 > p2 ) - return; - - if ( BOUNDS( ref1, worker->max_points ) || - BOUNDS( ref2, worker->max_points ) ) - return; - - orus1 = worker->orus[ref1].x; - orus2 = worker->orus[ref2].x; - - if ( orus1 > orus2 ) - { - FT_F26Dot6 tmp_o; - FT_UInt tmp_r; - - - tmp_o = orus1; - orus1 = orus2; - orus2 = tmp_o; - - tmp_r = ref1; - ref1 = ref2; - ref2 = tmp_r; - } - - org1 = worker->orgs[ref1].x; - org2 = worker->orgs[ref2].x; - delta1 = worker->curs[ref1].x - org1; - delta2 = worker->curs[ref2].x - org2; - - if ( orus1 == orus2 ) - { - /* simple shift of untouched points */ - for ( i = p1; i <= p2; i++ ) - { - FT_F26Dot6 x = worker->orgs[i].x; - - - if ( x <= org1 ) - x += delta1; - else - x += delta2; - - worker->curs[i].x = x; - } - } - else - { - FT_Fixed scale = 0; - FT_Bool scale_valid = 0; - - - /* interpolation */ - for ( i = p1; i <= p2; i++ ) - { - FT_F26Dot6 x = worker->orgs[i].x; - - - if ( x <= org1 ) - x += delta1; - - else if ( x >= org2 ) - x += delta2; - - else - { - if ( !scale_valid ) - { - scale_valid = 1; - scale = FT_DivFix( org2 + delta2 - ( org1 + delta1 ), - orus2 - orus1 ); - } - - x = ( org1 + delta1 ) + - FT_MulFix( worker->orus[i].x - orus1, scale ); - } - worker->curs[i].x = x; - } - } - } - - - /*************************************************************************/ - /* */ - /* IUP[a]: Interpolate Untouched Points */ - /* Opcode range: 0x30-0x31 */ - /* Stack: --> */ - /* */ - static void - Ins_IUP( INS_ARG ) - { - IUP_WorkerRec V; - FT_Byte mask; - - FT_UInt first_point; /* first point of contour */ - FT_UInt end_point; /* end point (last+1) of contour */ - - FT_UInt first_touched; /* first touched point in contour */ - FT_UInt cur_touched; /* current touched point in contour */ - - FT_UInt point; /* current point */ - FT_Short contour; /* current contour */ - - FT_UNUSED_ARG; - - - /* ignore empty outlines */ - if ( CUR.pts.n_contours == 0 ) - return; - - if ( CUR.opcode & 1 ) - { - mask = FT_CURVE_TAG_TOUCH_X; - V.orgs = CUR.pts.org; - V.curs = CUR.pts.cur; - V.orus = CUR.pts.orus; - } - else - { - mask = FT_CURVE_TAG_TOUCH_Y; - V.orgs = (FT_Vector*)( (FT_Pos*)CUR.pts.org + 1 ); - V.curs = (FT_Vector*)( (FT_Pos*)CUR.pts.cur + 1 ); - V.orus = (FT_Vector*)( (FT_Pos*)CUR.pts.orus + 1 ); - } - V.max_points = CUR.pts.n_points; - - contour = 0; - point = 0; - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode ) - { - CUR.iup_called = TRUE; - if ( CUR.sph_tweak_flags & SPH_TWEAK_SKIP_IUP ) - return; - } -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - do - { - end_point = CUR.pts.contours[contour] - CUR.pts.first_point; - first_point = point; - - if ( BOUNDS ( end_point, CUR.pts.n_points ) ) - end_point = CUR.pts.n_points - 1; - - while ( point <= end_point && ( CUR.pts.tags[point] & mask ) == 0 ) - point++; - - if ( point <= end_point ) - { - first_touched = point; - cur_touched = point; - - point++; - - while ( point <= end_point ) - { - if ( ( CUR.pts.tags[point] & mask ) != 0 ) - { - _iup_worker_interpolate( &V, - cur_touched + 1, - point - 1, - cur_touched, - point ); - cur_touched = point; - } - - point++; - } - - if ( cur_touched == first_touched ) - _iup_worker_shift( &V, first_point, end_point, cur_touched ); - else - { - _iup_worker_interpolate( &V, - (FT_UShort)( cur_touched + 1 ), - end_point, - cur_touched, - first_touched ); - - if ( first_touched > 0 ) - _iup_worker_interpolate( &V, - first_point, - first_touched - 1, - cur_touched, - first_touched ); - } - } - contour++; - } while ( contour < CUR.pts.n_contours ); - } - - - /*************************************************************************/ - /* */ - /* DELTAPn[]: DELTA exceptions P1, P2, P3 */ - /* Opcode range: 0x5D,0x71,0x72 */ - /* Stack: uint32 (2 * uint32)... --> */ - /* */ - static void - Ins_DELTAP( INS_ARG ) - { - FT_ULong k, nump; - FT_UShort A; - FT_ULong C; - FT_Long B; -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - FT_UShort B1, B2; - - - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && - CUR.iup_called && - ( CUR.sph_tweak_flags & SPH_TWEAK_NO_DELTAP_AFTER_IUP ) ) - goto Fail; -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - -#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING - /* Delta hinting is covered by US Patent 5159668. */ - if ( CUR.face->unpatented_hinting ) - { - FT_Long n = args[0] * 2; - - - if ( CUR.args < n ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Too_Few_Arguments ); - n = CUR.args; - } - - CUR.args -= n; - CUR.new_top = CUR.args; - return; - } -#endif - - nump = (FT_ULong)args[0]; /* some points theoretically may occur more - than once, thus UShort isn't enough */ - - for ( k = 1; k <= nump; k++ ) - { - if ( CUR.args < 2 ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Too_Few_Arguments ); - CUR.args = 0; - goto Fail; - } - - CUR.args -= 2; - - A = (FT_UShort)CUR.stack[CUR.args + 1]; - B = CUR.stack[CUR.args]; - - /* XXX: Because some popular fonts contain some invalid DeltaP */ - /* instructions, we simply ignore them when the stacked */ - /* point reference is off limit, rather than returning an */ - /* error. As a delta instruction doesn't change a glyph */ - /* in great ways, this shouldn't be a problem. */ - - if ( !BOUNDS( A, CUR.zp0.n_points ) ) - { - C = ( (FT_ULong)B & 0xF0 ) >> 4; - - switch ( CUR.opcode ) - { - case 0x5D: - break; - - case 0x71: - C += 16; - break; - - case 0x72: - C += 32; - break; - } - - C += CUR.GS.delta_base; - - if ( CURRENT_Ppem() == (FT_Long)C ) - { - B = ( (FT_ULong)B & 0xF ) - 8; - if ( B >= 0 ) - B++; - B = B * 64 / ( 1L << CUR.GS.delta_shift ); - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - - if ( SUBPIXEL_HINTING ) - { - /* - * Allow delta move if - * - * - not using ignore_x_mode rendering - * - glyph is specifically set to allow it - * - glyph is composite and freedom vector is not subpixel - * vector - */ - if ( !CUR.ignore_x_mode || - ( CUR.sph_tweak_flags & SPH_TWEAK_ALWAYS_DO_DELTAP ) || - ( CUR.is_composite && CUR.GS.freeVector.y != 0 ) ) - CUR_Func_move( &CUR.zp0, A, B ); - - /* Otherwise apply subpixel hinting and */ - /* compatibility mode rules */ - else if ( CUR.ignore_x_mode ) - { - if ( CUR.GS.freeVector.y != 0 ) - B1 = CUR.zp0.cur[A].y; - else - B1 = CUR.zp0.cur[A].x; - -#if 0 - /* Standard Subpixel Hinting: Allow y move. */ - /* This messes up dejavu and may not be needed... */ - if ( !CUR.face->sph_compatibility_mode && - CUR.GS.freeVector.y != 0 ) - CUR_Func_move( &CUR.zp0, A, B ); - else -#endif /* 0 */ - - /* Compatibility Mode: Allow x or y move if point touched in */ - /* Y direction. */ - if ( CUR.face->sph_compatibility_mode && - !( CUR.sph_tweak_flags & SPH_TWEAK_ALWAYS_SKIP_DELTAP ) ) - { - /* save the y value of the point now; compare after move */ - B1 = CUR.zp0.cur[A].y; - - if ( CUR.sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES ) - B = FT_PIX_ROUND( B1 + B ) - B1; - - /* Allow delta move if using sph_compatibility_mode, */ - /* IUP has not been called, and point is touched on Y. */ - if ( !CUR.iup_called && - ( CUR.zp0.tags[A] & FT_CURVE_TAG_TOUCH_Y ) ) - CUR_Func_move( &CUR.zp0, A, B ); - } - - B2 = CUR.zp0.cur[A].y; - - /* Reverse this move if it results in a disallowed move */ - if ( CUR.GS.freeVector.y != 0 && - ( ( CUR.face->sph_compatibility_mode && - ( B1 & 63 ) == 0 && - ( B2 & 63 ) != 0 ) || - ( ( CUR.sph_tweak_flags & - SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES_DELTAP ) && - ( B1 & 63 ) != 0 && - ( B2 & 63 ) != 0 ) ) ) - CUR_Func_move( &CUR.zp0, A, -B ); - } - } - else -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - CUR_Func_move( &CUR.zp0, A, B ); - } - } - else - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Invalid_Reference ); - } - - Fail: - CUR.new_top = CUR.args; - } - - - /*************************************************************************/ - /* */ - /* DELTACn[]: DELTA exceptions C1, C2, C3 */ - /* Opcode range: 0x73,0x74,0x75 */ - /* Stack: uint32 (2 * uint32)... --> */ - /* */ - static void - Ins_DELTAC( INS_ARG ) - { - FT_ULong nump, k; - FT_ULong A, C; - FT_Long B; - - -#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING - /* Delta hinting is covered by US Patent 5159668. */ - if ( CUR.face->unpatented_hinting ) - { - FT_Long n = args[0] * 2; - - - if ( CUR.args < n ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Too_Few_Arguments ); - n = CUR.args; - } - - CUR.args -= n; - CUR.new_top = CUR.args; - return; - } -#endif - - nump = (FT_ULong)args[0]; - - for ( k = 1; k <= nump; k++ ) - { - if ( CUR.args < 2 ) - { - if ( CUR.pedantic_hinting ) - CUR.error = FT_THROW( Too_Few_Arguments ); - CUR.args = 0; - goto Fail; - } - - CUR.args -= 2; - - A = (FT_ULong)CUR.stack[CUR.args + 1]; - B = CUR.stack[CUR.args]; - - if ( BOUNDSL( A, CUR.cvtSize ) ) - { - if ( CUR.pedantic_hinting ) - { - CUR.error = FT_THROW( Invalid_Reference ); - return; - } - } - else - { - C = ( (FT_ULong)B & 0xF0 ) >> 4; - - switch ( CUR.opcode ) - { - case 0x73: - break; - - case 0x74: - C += 16; - break; - - case 0x75: - C += 32; - break; - } - - C += CUR.GS.delta_base; - - if ( CURRENT_Ppem() == (FT_Long)C ) - { - B = ( (FT_ULong)B & 0xF ) - 8; - if ( B >= 0 ) - B++; - B = B * 64 / ( 1L << CUR.GS.delta_shift ); - - CUR_Func_move_cvt( A, B ); - } - } - } - - Fail: - CUR.new_top = CUR.args; - } - - - /*************************************************************************/ - /* */ - /* MISC. INSTRUCTIONS */ - /* */ - /*************************************************************************/ - - - /*************************************************************************/ - /* */ - /* GETINFO[]: GET INFOrmation */ - /* Opcode range: 0x88 */ - /* Stack: uint32 --> uint32 */ - /* */ - static void - Ins_GETINFO( INS_ARG ) - { - FT_Long K; - - - K = 0; - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - /********************************/ - /* RASTERIZER VERSION */ - /* Selector Bit: 0 */ - /* Return Bit(s): 0-7 */ - /* */ - if ( SUBPIXEL_HINTING && - ( args[0] & 1 ) != 0 && - CUR.ignore_x_mode ) - { - K = CUR.rasterizer_version; - FT_TRACE7(( "Setting rasterizer version %d\n", - CUR.rasterizer_version )); - } - else -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - if ( ( args[0] & 1 ) != 0 ) - K = TT_INTERPRETER_VERSION_35; - - /********************************/ - /* GLYPH ROTATED */ - /* Selector Bit: 1 */ - /* Return Bit(s): 8 */ - /* */ - if ( ( args[0] & 2 ) != 0 && CUR.tt_metrics.rotated ) - K |= 0x80; - - /********************************/ - /* GLYPH STRETCHED */ - /* Selector Bit: 2 */ - /* Return Bit(s): 9 */ - /* */ - if ( ( args[0] & 4 ) != 0 && CUR.tt_metrics.stretched ) - K |= 1 << 8; - - /********************************/ - /* HINTING FOR GRAYSCALE */ - /* Selector Bit: 5 */ - /* Return Bit(s): 12 */ - /* */ - if ( ( args[0] & 32 ) != 0 && CUR.grayscale ) - K |= 1 << 12; - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - - if ( SUBPIXEL_HINTING && - CUR.ignore_x_mode && - CUR.rasterizer_version >= TT_INTERPRETER_VERSION_35 ) - { - /********************************/ - /* HINTING FOR GRAYSCALE */ - /* Selector Bit: 5 */ - /* Return Bit(s): 12 */ - /* */ - if ( ( args[0] & 32 ) != 0 && CUR.grayscale_hinting ) - K |= 1 << 12; - - /********************************/ - /* HINTING FOR SUBPIXEL */ - /* Selector Bit: 6 */ - /* Return Bit(s): 13 */ - /* */ - if ( ( args[0] & 64 ) != 0 && - CUR.subpixel_hinting && - CUR.rasterizer_version >= 37 ) - { - K |= 1 << 13; - - /* the stuff below is irrelevant if subpixel_hinting is not set */ - - /********************************/ - /* COMPATIBLE WIDTHS ENABLED */ - /* Selector Bit: 7 */ - /* Return Bit(s): 14 */ - /* */ - /* Functionality still needs to be added */ - if ( ( args[0] & 128 ) != 0 && CUR.compatible_widths ) - K |= 1 << 14; - - /********************************/ - /* SYMMETRICAL SMOOTHING */ - /* Selector Bit: 8 */ - /* Return Bit(s): 15 */ - /* */ - /* Functionality still needs to be added */ - if ( ( args[0] & 256 ) != 0 && CUR.symmetrical_smoothing ) - K |= 1 << 15; - - /********************************/ - /* HINTING FOR BGR? */ - /* Selector Bit: 9 */ - /* Return Bit(s): 16 */ - /* */ - /* Functionality still needs to be added */ - if ( ( args[0] & 512 ) != 0 && CUR.bgr ) - K |= 1 << 16; - - if ( CUR.rasterizer_version >= 38 ) - { - /********************************/ - /* SUBPIXEL POSITIONED? */ - /* Selector Bit: 10 */ - /* Return Bit(s): 17 */ - /* */ - /* Functionality still needs to be added */ - if ( ( args[0] & 1024 ) != 0 && CUR.subpixel_positioned ) - K |= 1 << 17; - } - } - } - -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - args[0] = K; - } - - - static void - Ins_UNKNOWN( INS_ARG ) - { - TT_DefRecord* def = CUR.IDefs; - TT_DefRecord* limit = def + CUR.numIDefs; - - FT_UNUSED_ARG; - - - for ( ; def < limit; def++ ) - { - if ( (FT_Byte)def->opc == CUR.opcode && def->active ) - { - TT_CallRec* call; - - - if ( CUR.callTop >= CUR.callSize ) - { - CUR.error = FT_THROW( Stack_Overflow ); - return; - } - - call = CUR.callStack + CUR.callTop++; - - call->Caller_Range = CUR.curRange; - call->Caller_IP = CUR.IP + 1; - call->Cur_Count = 1; - call->Cur_Restart = def->start; - call->Cur_End = def->end; - - INS_Goto_CodeRange( def->range, def->start ); - - CUR.step_ins = FALSE; - return; - } - } - - CUR.error = FT_THROW( Invalid_Opcode ); - } - - -#ifndef TT_CONFIG_OPTION_INTERPRETER_SWITCH - - - static - TInstruction_Function Instruct_Dispatch[256] = - { - /* Opcodes are gathered in groups of 16. */ - /* Please keep the spaces as they are. */ - - /* SVTCA y */ Ins_SVTCA, - /* SVTCA x */ Ins_SVTCA, - /* SPvTCA y */ Ins_SPVTCA, - /* SPvTCA x */ Ins_SPVTCA, - /* SFvTCA y */ Ins_SFVTCA, - /* SFvTCA x */ Ins_SFVTCA, - /* SPvTL // */ Ins_SPVTL, - /* SPvTL + */ Ins_SPVTL, - /* SFvTL // */ Ins_SFVTL, - /* SFvTL + */ Ins_SFVTL, - /* SPvFS */ Ins_SPVFS, - /* SFvFS */ Ins_SFVFS, - /* GPV */ Ins_GPV, - /* GFV */ Ins_GFV, - /* SFvTPv */ Ins_SFVTPV, - /* ISECT */ Ins_ISECT, - - /* SRP0 */ Ins_SRP0, - /* SRP1 */ Ins_SRP1, - /* SRP2 */ Ins_SRP2, - /* SZP0 */ Ins_SZP0, - /* SZP1 */ Ins_SZP1, - /* SZP2 */ Ins_SZP2, - /* SZPS */ Ins_SZPS, - /* SLOOP */ Ins_SLOOP, - /* RTG */ Ins_RTG, - /* RTHG */ Ins_RTHG, - /* SMD */ Ins_SMD, - /* ELSE */ Ins_ELSE, - /* JMPR */ Ins_JMPR, - /* SCvTCi */ Ins_SCVTCI, - /* SSwCi */ Ins_SSWCI, - /* SSW */ Ins_SSW, - - /* DUP */ Ins_DUP, - /* POP */ Ins_POP, - /* CLEAR */ Ins_CLEAR, - /* SWAP */ Ins_SWAP, - /* DEPTH */ Ins_DEPTH, - /* CINDEX */ Ins_CINDEX, - /* MINDEX */ Ins_MINDEX, - /* AlignPTS */ Ins_ALIGNPTS, - /* INS_0x28 */ Ins_UNKNOWN, - /* UTP */ Ins_UTP, - /* LOOPCALL */ Ins_LOOPCALL, - /* CALL */ Ins_CALL, - /* FDEF */ Ins_FDEF, - /* ENDF */ Ins_ENDF, - /* MDAP[0] */ Ins_MDAP, - /* MDAP[1] */ Ins_MDAP, - - /* IUP[0] */ Ins_IUP, - /* IUP[1] */ Ins_IUP, - /* SHP[0] */ Ins_SHP, - /* SHP[1] */ Ins_SHP, - /* SHC[0] */ Ins_SHC, - /* SHC[1] */ Ins_SHC, - /* SHZ[0] */ Ins_SHZ, - /* SHZ[1] */ Ins_SHZ, - /* SHPIX */ Ins_SHPIX, - /* IP */ Ins_IP, - /* MSIRP[0] */ Ins_MSIRP, - /* MSIRP[1] */ Ins_MSIRP, - /* AlignRP */ Ins_ALIGNRP, - /* RTDG */ Ins_RTDG, - /* MIAP[0] */ Ins_MIAP, - /* MIAP[1] */ Ins_MIAP, - - /* NPushB */ Ins_NPUSHB, - /* NPushW */ Ins_NPUSHW, - /* WS */ Ins_WS, - /* RS */ Ins_RS, - /* WCvtP */ Ins_WCVTP, - /* RCvt */ Ins_RCVT, - /* GC[0] */ Ins_GC, - /* GC[1] */ Ins_GC, - /* SCFS */ Ins_SCFS, - /* MD[0] */ Ins_MD, - /* MD[1] */ Ins_MD, - /* MPPEM */ Ins_MPPEM, - /* MPS */ Ins_MPS, - /* FlipON */ Ins_FLIPON, - /* FlipOFF */ Ins_FLIPOFF, - /* DEBUG */ Ins_DEBUG, - - /* LT */ Ins_LT, - /* LTEQ */ Ins_LTEQ, - /* GT */ Ins_GT, - /* GTEQ */ Ins_GTEQ, - /* EQ */ Ins_EQ, - /* NEQ */ Ins_NEQ, - /* ODD */ Ins_ODD, - /* EVEN */ Ins_EVEN, - /* IF */ Ins_IF, - /* EIF */ Ins_EIF, - /* AND */ Ins_AND, - /* OR */ Ins_OR, - /* NOT */ Ins_NOT, - /* DeltaP1 */ Ins_DELTAP, - /* SDB */ Ins_SDB, - /* SDS */ Ins_SDS, - - /* ADD */ Ins_ADD, - /* SUB */ Ins_SUB, - /* DIV */ Ins_DIV, - /* MUL */ Ins_MUL, - /* ABS */ Ins_ABS, - /* NEG */ Ins_NEG, - /* FLOOR */ Ins_FLOOR, - /* CEILING */ Ins_CEILING, - /* ROUND[0] */ Ins_ROUND, - /* ROUND[1] */ Ins_ROUND, - /* ROUND[2] */ Ins_ROUND, - /* ROUND[3] */ Ins_ROUND, - /* NROUND[0] */ Ins_NROUND, - /* NROUND[1] */ Ins_NROUND, - /* NROUND[2] */ Ins_NROUND, - /* NROUND[3] */ Ins_NROUND, - - /* WCvtF */ Ins_WCVTF, - /* DeltaP2 */ Ins_DELTAP, - /* DeltaP3 */ Ins_DELTAP, - /* DeltaCn[0] */ Ins_DELTAC, - /* DeltaCn[1] */ Ins_DELTAC, - /* DeltaCn[2] */ Ins_DELTAC, - /* SROUND */ Ins_SROUND, - /* S45Round */ Ins_S45ROUND, - /* JROT */ Ins_JROT, - /* JROF */ Ins_JROF, - /* ROFF */ Ins_ROFF, - /* INS_0x7B */ Ins_UNKNOWN, - /* RUTG */ Ins_RUTG, - /* RDTG */ Ins_RDTG, - /* SANGW */ Ins_SANGW, - /* AA */ Ins_AA, - - /* FlipPT */ Ins_FLIPPT, - /* FlipRgON */ Ins_FLIPRGON, - /* FlipRgOFF */ Ins_FLIPRGOFF, - /* INS_0x83 */ Ins_UNKNOWN, - /* INS_0x84 */ Ins_UNKNOWN, - /* ScanCTRL */ Ins_SCANCTRL, - /* SDPVTL[0] */ Ins_SDPVTL, - /* SDPVTL[1] */ Ins_SDPVTL, - /* GetINFO */ Ins_GETINFO, - /* IDEF */ Ins_IDEF, - /* ROLL */ Ins_ROLL, - /* MAX */ Ins_MAX, - /* MIN */ Ins_MIN, - /* ScanTYPE */ Ins_SCANTYPE, - /* InstCTRL */ Ins_INSTCTRL, - /* INS_0x8F */ Ins_UNKNOWN, - - /* INS_0x90 */ Ins_UNKNOWN, - /* INS_0x91 */ Ins_UNKNOWN, - /* INS_0x92 */ Ins_UNKNOWN, - /* INS_0x93 */ Ins_UNKNOWN, - /* INS_0x94 */ Ins_UNKNOWN, - /* INS_0x95 */ Ins_UNKNOWN, - /* INS_0x96 */ Ins_UNKNOWN, - /* INS_0x97 */ Ins_UNKNOWN, - /* INS_0x98 */ Ins_UNKNOWN, - /* INS_0x99 */ Ins_UNKNOWN, - /* INS_0x9A */ Ins_UNKNOWN, - /* INS_0x9B */ Ins_UNKNOWN, - /* INS_0x9C */ Ins_UNKNOWN, - /* INS_0x9D */ Ins_UNKNOWN, - /* INS_0x9E */ Ins_UNKNOWN, - /* INS_0x9F */ Ins_UNKNOWN, - - /* INS_0xA0 */ Ins_UNKNOWN, - /* INS_0xA1 */ Ins_UNKNOWN, - /* INS_0xA2 */ Ins_UNKNOWN, - /* INS_0xA3 */ Ins_UNKNOWN, - /* INS_0xA4 */ Ins_UNKNOWN, - /* INS_0xA5 */ Ins_UNKNOWN, - /* INS_0xA6 */ Ins_UNKNOWN, - /* INS_0xA7 */ Ins_UNKNOWN, - /* INS_0xA8 */ Ins_UNKNOWN, - /* INS_0xA9 */ Ins_UNKNOWN, - /* INS_0xAA */ Ins_UNKNOWN, - /* INS_0xAB */ Ins_UNKNOWN, - /* INS_0xAC */ Ins_UNKNOWN, - /* INS_0xAD */ Ins_UNKNOWN, - /* INS_0xAE */ Ins_UNKNOWN, - /* INS_0xAF */ Ins_UNKNOWN, - - /* PushB[0] */ Ins_PUSHB, - /* PushB[1] */ Ins_PUSHB, - /* PushB[2] */ Ins_PUSHB, - /* PushB[3] */ Ins_PUSHB, - /* PushB[4] */ Ins_PUSHB, - /* PushB[5] */ Ins_PUSHB, - /* PushB[6] */ Ins_PUSHB, - /* PushB[7] */ Ins_PUSHB, - /* PushW[0] */ Ins_PUSHW, - /* PushW[1] */ Ins_PUSHW, - /* PushW[2] */ Ins_PUSHW, - /* PushW[3] */ Ins_PUSHW, - /* PushW[4] */ Ins_PUSHW, - /* PushW[5] */ Ins_PUSHW, - /* PushW[6] */ Ins_PUSHW, - /* PushW[7] */ Ins_PUSHW, - - /* MDRP[00] */ Ins_MDRP, - /* MDRP[01] */ Ins_MDRP, - /* MDRP[02] */ Ins_MDRP, - /* MDRP[03] */ Ins_MDRP, - /* MDRP[04] */ Ins_MDRP, - /* MDRP[05] */ Ins_MDRP, - /* MDRP[06] */ Ins_MDRP, - /* MDRP[07] */ Ins_MDRP, - /* MDRP[08] */ Ins_MDRP, - /* MDRP[09] */ Ins_MDRP, - /* MDRP[10] */ Ins_MDRP, - /* MDRP[11] */ Ins_MDRP, - /* MDRP[12] */ Ins_MDRP, - /* MDRP[13] */ Ins_MDRP, - /* MDRP[14] */ Ins_MDRP, - /* MDRP[15] */ Ins_MDRP, - - /* MDRP[16] */ Ins_MDRP, - /* MDRP[17] */ Ins_MDRP, - /* MDRP[18] */ Ins_MDRP, - /* MDRP[19] */ Ins_MDRP, - /* MDRP[20] */ Ins_MDRP, - /* MDRP[21] */ Ins_MDRP, - /* MDRP[22] */ Ins_MDRP, - /* MDRP[23] */ Ins_MDRP, - /* MDRP[24] */ Ins_MDRP, - /* MDRP[25] */ Ins_MDRP, - /* MDRP[26] */ Ins_MDRP, - /* MDRP[27] */ Ins_MDRP, - /* MDRP[28] */ Ins_MDRP, - /* MDRP[29] */ Ins_MDRP, - /* MDRP[30] */ Ins_MDRP, - /* MDRP[31] */ Ins_MDRP, - - /* MIRP[00] */ Ins_MIRP, - /* MIRP[01] */ Ins_MIRP, - /* MIRP[02] */ Ins_MIRP, - /* MIRP[03] */ Ins_MIRP, - /* MIRP[04] */ Ins_MIRP, - /* MIRP[05] */ Ins_MIRP, - /* MIRP[06] */ Ins_MIRP, - /* MIRP[07] */ Ins_MIRP, - /* MIRP[08] */ Ins_MIRP, - /* MIRP[09] */ Ins_MIRP, - /* MIRP[10] */ Ins_MIRP, - /* MIRP[11] */ Ins_MIRP, - /* MIRP[12] */ Ins_MIRP, - /* MIRP[13] */ Ins_MIRP, - /* MIRP[14] */ Ins_MIRP, - /* MIRP[15] */ Ins_MIRP, - - /* MIRP[16] */ Ins_MIRP, - /* MIRP[17] */ Ins_MIRP, - /* MIRP[18] */ Ins_MIRP, - /* MIRP[19] */ Ins_MIRP, - /* MIRP[20] */ Ins_MIRP, - /* MIRP[21] */ Ins_MIRP, - /* MIRP[22] */ Ins_MIRP, - /* MIRP[23] */ Ins_MIRP, - /* MIRP[24] */ Ins_MIRP, - /* MIRP[25] */ Ins_MIRP, - /* MIRP[26] */ Ins_MIRP, - /* MIRP[27] */ Ins_MIRP, - /* MIRP[28] */ Ins_MIRP, - /* MIRP[29] */ Ins_MIRP, - /* MIRP[30] */ Ins_MIRP, - /* MIRP[31] */ Ins_MIRP - }; - - -#endif /* !TT_CONFIG_OPTION_INTERPRETER_SWITCH */ - - - /*************************************************************************/ - /* */ - /* RUN */ - /* */ - /* This function executes a run of opcodes. It will exit in the */ - /* following cases: */ - /* */ - /* - Errors (in which case it returns FALSE). */ - /* */ - /* - Reaching the end of the main code range (returns TRUE). */ - /* Reaching the end of a code range within a function call is an */ - /* error. */ - /* */ - /* - After executing one single opcode, if the flag `Instruction_Trap' */ - /* is set to TRUE (returns TRUE). */ - /* */ - /* On exit with TRUE, test IP < CodeSize to know whether it comes from */ - /* an instruction trap or a normal termination. */ - /* */ - /* */ - /* Note: The documented DEBUG opcode pops a value from the stack. This */ - /* behaviour is unsupported; here a DEBUG opcode is always an */ - /* error. */ - /* */ - /* */ - /* THIS IS THE INTERPRETER'S MAIN LOOP. */ - /* */ - /* Instructions appear in the specification's order. */ - /* */ - /*************************************************************************/ - - - /* documentation is in ttinterp.h */ - - FT_EXPORT_DEF( FT_Error ) - TT_RunIns( TT_ExecContext exc ) - { - FT_Long ins_counter = 0; /* executed instructions counter */ - FT_UShort i; - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - FT_Byte opcode_pattern[1][2] = { - /* #8 TypeMan Talk Align */ - { - 0x06, /* SPVTL */ - 0x7D, /* RDTG */ - }, - }; - FT_UShort opcode_patterns = 1; - FT_UShort opcode_pointer[1] = { 0 }; - FT_UShort opcode_size[1] = { 1 }; -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - -#ifdef TT_CONFIG_OPTION_STATIC_RASTER - cur = *exc; -#endif - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - CUR.iup_called = FALSE; -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - - /* set CVT functions */ - CUR.tt_metrics.ratio = 0; - if ( CUR.metrics.x_ppem != CUR.metrics.y_ppem ) - { - /* non-square pixels, use the stretched routines */ - CUR.func_read_cvt = Read_CVT_Stretched; - CUR.func_write_cvt = Write_CVT_Stretched; - CUR.func_move_cvt = Move_CVT_Stretched; - } - else - { - /* square pixels, use normal routines */ - CUR.func_read_cvt = Read_CVT; - CUR.func_write_cvt = Write_CVT; - CUR.func_move_cvt = Move_CVT; - } - - COMPUTE_Funcs(); - COMPUTE_Round( (FT_Byte)exc->GS.round_state ); - - do - { - CUR.opcode = CUR.code[CUR.IP]; - - FT_TRACE7(( " " )); - FT_TRACE7(( opcode_name[CUR.opcode] )); - FT_TRACE7(( "\n" )); - - if ( ( CUR.length = opcode_length[CUR.opcode] ) < 0 ) - { - if ( CUR.IP + 1 >= CUR.codeSize ) - goto LErrorCodeOverflow_; - - CUR.length = 2 - CUR.length * CUR.code[CUR.IP + 1]; - } - - if ( CUR.IP + CUR.length > CUR.codeSize ) - goto LErrorCodeOverflow_; - - /* First, let's check for empty stack and overflow */ - CUR.args = CUR.top - ( Pop_Push_Count[CUR.opcode] >> 4 ); - - /* `args' is the top of the stack once arguments have been popped. */ - /* One can also interpret it as the index of the last argument. */ - if ( CUR.args < 0 ) - { - if ( CUR.pedantic_hinting ) - { - CUR.error = FT_THROW( Too_Few_Arguments ); - goto LErrorLabel_; - } - - /* push zeroes onto the stack */ - for ( i = 0; i < Pop_Push_Count[CUR.opcode] >> 4; i++ ) - CUR.stack[i] = 0; - CUR.args = 0; - } - - CUR.new_top = CUR.args + ( Pop_Push_Count[CUR.opcode] & 15 ); - - /* `new_top' is the new top of the stack, after the instruction's */ - /* execution. `top' will be set to `new_top' after the `switch' */ - /* statement. */ - if ( CUR.new_top > CUR.stackSize ) - { - CUR.error = FT_THROW( Stack_Overflow ); - goto LErrorLabel_; - } - - CUR.step_ins = TRUE; - CUR.error = FT_Err_Ok; - -#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING - - if ( SUBPIXEL_HINTING ) - { - for ( i = 0; i < opcode_patterns; i++ ) - { - if ( opcode_pointer[i] < opcode_size[i] && - CUR.opcode == opcode_pattern[i][opcode_pointer[i]] ) - { - opcode_pointer[i] += 1; - - if ( opcode_pointer[i] == opcode_size[i] ) - { - FT_TRACE7(( "sph: opcode ptrn: %d, %s %s\n", - i, - CUR.face->root.family_name, - CUR.face->root.style_name )); - - switch ( i ) - { - case 0: - break; - } - opcode_pointer[i] = 0; - } - } - else - opcode_pointer[i] = 0; - } - } - -#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ - -#ifdef TT_CONFIG_OPTION_INTERPRETER_SWITCH - - { - FT_Long* args = CUR.stack + CUR.args; - FT_Byte opcode = CUR.opcode; - - -#undef ARRAY_BOUND_ERROR -#define ARRAY_BOUND_ERROR goto Set_Invalid_Ref - - - switch ( opcode ) - { - case 0x00: /* SVTCA y */ - case 0x01: /* SVTCA x */ - case 0x02: /* SPvTCA y */ - case 0x03: /* SPvTCA x */ - case 0x04: /* SFvTCA y */ - case 0x05: /* SFvTCA x */ - { - FT_Short AA, BB; - - - AA = (FT_Short)( ( opcode & 1 ) << 14 ); - BB = (FT_Short)( AA ^ 0x4000 ); - - if ( opcode < 4 ) - { - CUR.GS.projVector.x = AA; - CUR.GS.projVector.y = BB; - - CUR.GS.dualVector.x = AA; - CUR.GS.dualVector.y = BB; - } - else - { - GUESS_VECTOR( projVector ); - } - - if ( ( opcode & 2 ) == 0 ) - { - CUR.GS.freeVector.x = AA; - CUR.GS.freeVector.y = BB; - } - else - { - GUESS_VECTOR( freeVector ); - } - - COMPUTE_Funcs(); - } - break; - - case 0x06: /* SPvTL // */ - case 0x07: /* SPvTL + */ - DO_SPVTL - break; - - case 0x08: /* SFvTL // */ - case 0x09: /* SFvTL + */ - DO_SFVTL - break; - - case 0x0A: /* SPvFS */ - DO_SPVFS - break; - - case 0x0B: /* SFvFS */ - DO_SFVFS - break; - - case 0x0C: /* GPV */ - DO_GPV - break; - - case 0x0D: /* GFV */ - DO_GFV - break; - - case 0x0E: /* SFvTPv */ - DO_SFVTPV - break; - - case 0x0F: /* ISECT */ - Ins_ISECT( EXEC_ARG_ args ); - break; - - case 0x10: /* SRP0 */ - DO_SRP0 - break; - - case 0x11: /* SRP1 */ - DO_SRP1 - break; - - case 0x12: /* SRP2 */ - DO_SRP2 - break; - - case 0x13: /* SZP0 */ - Ins_SZP0( EXEC_ARG_ args ); - break; - - case 0x14: /* SZP1 */ - Ins_SZP1( EXEC_ARG_ args ); - break; - - case 0x15: /* SZP2 */ - Ins_SZP2( EXEC_ARG_ args ); - break; - - case 0x16: /* SZPS */ - Ins_SZPS( EXEC_ARG_ args ); - break; - - case 0x17: /* SLOOP */ - DO_SLOOP - break; - - case 0x18: /* RTG */ - DO_RTG - break; - - case 0x19: /* RTHG */ - DO_RTHG - break; - - case 0x1A: /* SMD */ - DO_SMD - break; - - case 0x1B: /* ELSE */ - Ins_ELSE( EXEC_ARG_ args ); - break; - - case 0x1C: /* JMPR */ - DO_JMPR - break; - - case 0x1D: /* SCVTCI */ - DO_SCVTCI - break; - - case 0x1E: /* SSWCI */ - DO_SSWCI - break; - - case 0x1F: /* SSW */ - DO_SSW - break; - - case 0x20: /* DUP */ - DO_DUP - break; - - case 0x21: /* POP */ - /* nothing :-) */ - break; - - case 0x22: /* CLEAR */ - DO_CLEAR - break; - - case 0x23: /* SWAP */ - DO_SWAP - break; - - case 0x24: /* DEPTH */ - DO_DEPTH - break; - - case 0x25: /* CINDEX */ - DO_CINDEX - break; - - case 0x26: /* MINDEX */ - Ins_MINDEX( EXEC_ARG_ args ); - break; - - case 0x27: /* ALIGNPTS */ - Ins_ALIGNPTS( EXEC_ARG_ args ); - break; - - case 0x28: /* ???? */ - Ins_UNKNOWN( EXEC_ARG_ args ); - break; - - case 0x29: /* UTP */ - Ins_UTP( EXEC_ARG_ args ); - break; - - case 0x2A: /* LOOPCALL */ - Ins_LOOPCALL( EXEC_ARG_ args ); - break; - - case 0x2B: /* CALL */ - Ins_CALL( EXEC_ARG_ args ); - break; - - case 0x2C: /* FDEF */ - Ins_FDEF( EXEC_ARG_ args ); - break; - - case 0x2D: /* ENDF */ - Ins_ENDF( EXEC_ARG_ args ); - break; - - case 0x2E: /* MDAP */ - case 0x2F: /* MDAP */ - Ins_MDAP( EXEC_ARG_ args ); - break; - - case 0x30: /* IUP */ - case 0x31: /* IUP */ - Ins_IUP( EXEC_ARG_ args ); - break; - - case 0x32: /* SHP */ - case 0x33: /* SHP */ - Ins_SHP( EXEC_ARG_ args ); - break; - - case 0x34: /* SHC */ - case 0x35: /* SHC */ - Ins_SHC( EXEC_ARG_ args ); - break; - - case 0x36: /* SHZ */ - case 0x37: /* SHZ */ - Ins_SHZ( EXEC_ARG_ args ); - break; - - case 0x38: /* SHPIX */ - Ins_SHPIX( EXEC_ARG_ args ); - break; - - case 0x39: /* IP */ - Ins_IP( EXEC_ARG_ args ); - break; - - case 0x3A: /* MSIRP */ - case 0x3B: /* MSIRP */ - Ins_MSIRP( EXEC_ARG_ args ); - break; - - case 0x3C: /* AlignRP */ - Ins_ALIGNRP( EXEC_ARG_ args ); - break; - - case 0x3D: /* RTDG */ - DO_RTDG - break; - - case 0x3E: /* MIAP */ - case 0x3F: /* MIAP */ - Ins_MIAP( EXEC_ARG_ args ); - break; - - case 0x40: /* NPUSHB */ - Ins_NPUSHB( EXEC_ARG_ args ); - break; - - case 0x41: /* NPUSHW */ - Ins_NPUSHW( EXEC_ARG_ args ); - break; - - case 0x42: /* WS */ - DO_WS - break; - - Set_Invalid_Ref: - CUR.error = FT_THROW( Invalid_Reference ); - break; - - case 0x43: /* RS */ - DO_RS - break; - - case 0x44: /* WCVTP */ - DO_WCVTP - break; - - case 0x45: /* RCVT */ - DO_RCVT - break; - - case 0x46: /* GC */ - case 0x47: /* GC */ - Ins_GC( EXEC_ARG_ args ); - break; - - case 0x48: /* SCFS */ - Ins_SCFS( EXEC_ARG_ args ); - break; - - case 0x49: /* MD */ - case 0x4A: /* MD */ - Ins_MD( EXEC_ARG_ args ); - break; - - case 0x4B: /* MPPEM */ - DO_MPPEM - break; - - case 0x4C: /* MPS */ - DO_MPS - break; - - case 0x4D: /* FLIPON */ - DO_FLIPON - break; - - case 0x4E: /* FLIPOFF */ - DO_FLIPOFF - break; - - case 0x4F: /* DEBUG */ - DO_DEBUG - break; - - case 0x50: /* LT */ - DO_LT - break; - - case 0x51: /* LTEQ */ - DO_LTEQ - break; - - case 0x52: /* GT */ - DO_GT - break; - - case 0x53: /* GTEQ */ - DO_GTEQ - break; - - case 0x54: /* EQ */ - DO_EQ - break; - - case 0x55: /* NEQ */ - DO_NEQ - break; - - case 0x56: /* ODD */ - DO_ODD - break; - - case 0x57: /* EVEN */ - DO_EVEN - break; - - case 0x58: /* IF */ - Ins_IF( EXEC_ARG_ args ); - break; - - case 0x59: /* EIF */ - /* do nothing */ - break; - - case 0x5A: /* AND */ - DO_AND - break; - - case 0x5B: /* OR */ - DO_OR - break; - - case 0x5C: /* NOT */ - DO_NOT - break; - - case 0x5D: /* DELTAP1 */ - Ins_DELTAP( EXEC_ARG_ args ); - break; - - case 0x5E: /* SDB */ - DO_SDB - break; - - case 0x5F: /* SDS */ - DO_SDS - break; - - case 0x60: /* ADD */ - DO_ADD - break; - - case 0x61: /* SUB */ - DO_SUB - break; - - case 0x62: /* DIV */ - DO_DIV - break; - - case 0x63: /* MUL */ - DO_MUL - break; - - case 0x64: /* ABS */ - DO_ABS - break; - - case 0x65: /* NEG */ - DO_NEG - break; - - case 0x66: /* FLOOR */ - DO_FLOOR - break; - - case 0x67: /* CEILING */ - DO_CEILING - break; - - case 0x68: /* ROUND */ - case 0x69: /* ROUND */ - case 0x6A: /* ROUND */ - case 0x6B: /* ROUND */ - DO_ROUND - break; - - case 0x6C: /* NROUND */ - case 0x6D: /* NROUND */ - case 0x6E: /* NRRUND */ - case 0x6F: /* NROUND */ - DO_NROUND - break; - - case 0x70: /* WCVTF */ - DO_WCVTF - break; - - case 0x71: /* DELTAP2 */ - case 0x72: /* DELTAP3 */ - Ins_DELTAP( EXEC_ARG_ args ); - break; - - case 0x73: /* DELTAC0 */ - case 0x74: /* DELTAC1 */ - case 0x75: /* DELTAC2 */ - Ins_DELTAC( EXEC_ARG_ args ); - break; - - case 0x76: /* SROUND */ - DO_SROUND - break; - - case 0x77: /* S45Round */ - DO_S45ROUND - break; - - case 0x78: /* JROT */ - DO_JROT - break; - - case 0x79: /* JROF */ - DO_JROF - break; - - case 0x7A: /* ROFF */ - DO_ROFF - break; - - case 0x7B: /* ???? */ - Ins_UNKNOWN( EXEC_ARG_ args ); - break; - - case 0x7C: /* RUTG */ - DO_RUTG - break; - - case 0x7D: /* RDTG */ - DO_RDTG - break; - - case 0x7E: /* SANGW */ - case 0x7F: /* AA */ - /* nothing - obsolete */ - break; - - case 0x80: /* FLIPPT */ - Ins_FLIPPT( EXEC_ARG_ args ); - break; - - case 0x81: /* FLIPRGON */ - Ins_FLIPRGON( EXEC_ARG_ args ); - break; - - case 0x82: /* FLIPRGOFF */ - Ins_FLIPRGOFF( EXEC_ARG_ args ); - break; - - case 0x83: /* UNKNOWN */ - case 0x84: /* UNKNOWN */ - Ins_UNKNOWN( EXEC_ARG_ args ); - break; - - case 0x85: /* SCANCTRL */ - Ins_SCANCTRL( EXEC_ARG_ args ); - break; - - case 0x86: /* SDPVTL */ - case 0x87: /* SDPVTL */ - Ins_SDPVTL( EXEC_ARG_ args ); - break; - - case 0x88: /* GETINFO */ - Ins_GETINFO( EXEC_ARG_ args ); - break; - - case 0x89: /* IDEF */ - Ins_IDEF( EXEC_ARG_ args ); - break; - - case 0x8A: /* ROLL */ - Ins_ROLL( EXEC_ARG_ args ); - break; - - case 0x8B: /* MAX */ - DO_MAX - break; - - case 0x8C: /* MIN */ - DO_MIN - break; - - case 0x8D: /* SCANTYPE */ - Ins_SCANTYPE( EXEC_ARG_ args ); - break; - - case 0x8E: /* INSTCTRL */ - Ins_INSTCTRL( EXEC_ARG_ args ); - break; - - case 0x8F: - Ins_UNKNOWN( EXEC_ARG_ args ); - break; - - default: - if ( opcode >= 0xE0 ) - Ins_MIRP( EXEC_ARG_ args ); - else if ( opcode >= 0xC0 ) - Ins_MDRP( EXEC_ARG_ args ); - else if ( opcode >= 0xB8 ) - Ins_PUSHW( EXEC_ARG_ args ); - else if ( opcode >= 0xB0 ) - Ins_PUSHB( EXEC_ARG_ args ); - else - Ins_UNKNOWN( EXEC_ARG_ args ); - } - - } - -#else - - Instruct_Dispatch[CUR.opcode]( EXEC_ARG_ &CUR.stack[CUR.args] ); - -#endif /* TT_CONFIG_OPTION_INTERPRETER_SWITCH */ - - if ( CUR.error ) - { - switch ( CUR.error ) - { - /* looking for redefined instructions */ - case FT_ERR( Invalid_Opcode ): - { - TT_DefRecord* def = CUR.IDefs; - TT_DefRecord* limit = def + CUR.numIDefs; - - - for ( ; def < limit; def++ ) - { - if ( def->active && CUR.opcode == (FT_Byte)def->opc ) - { - TT_CallRec* callrec; - - - if ( CUR.callTop >= CUR.callSize ) - { - CUR.error = FT_THROW( Invalid_Reference ); - goto LErrorLabel_; - } - - callrec = &CUR.callStack[CUR.callTop]; - - callrec->Caller_Range = CUR.curRange; - callrec->Caller_IP = CUR.IP + 1; - callrec->Cur_Count = 1; - callrec->Cur_Restart = def->start; - callrec->Cur_End = def->end; - - if ( INS_Goto_CodeRange( def->range, def->start ) == FAILURE ) - goto LErrorLabel_; - - goto LSuiteLabel_; - } - } - } - - CUR.error = FT_THROW( Invalid_Opcode ); - goto LErrorLabel_; - -#if 0 - break; /* Unreachable code warning suppression. */ - /* Leave to remind in case a later change the editor */ - /* to consider break; */ -#endif - - default: - goto LErrorLabel_; - -#if 0 - break; -#endif - } - } - - CUR.top = CUR.new_top; - - if ( CUR.step_ins ) - CUR.IP += CUR.length; - - /* increment instruction counter and check if we didn't */ - /* run this program for too long (e.g. infinite loops). */ - if ( ++ins_counter > MAX_RUNNABLE_OPCODES ) - return FT_THROW( Execution_Too_Long ); - - LSuiteLabel_: - if ( CUR.IP >= CUR.codeSize ) - { - if ( CUR.callTop > 0 ) - { - CUR.error = FT_THROW( Code_Overflow ); - goto LErrorLabel_; - } - else - goto LNo_Error_; - } - } while ( !CUR.instruction_trap ); - - LNo_Error_: - -#ifdef TT_CONFIG_OPTION_STATIC_RASTER - *exc = cur; -#endif - - return FT_Err_Ok; - - LErrorCodeOverflow_: - CUR.error = FT_THROW( Code_Overflow ); - - LErrorLabel_: - -#ifdef TT_CONFIG_OPTION_STATIC_RASTER - *exc = cur; -#endif - - /* If any errors have occurred, function tables may be broken. */ - /* Force a re-execution of `prep' and `fpgm' tables if no */ - /* bytecode debugger is run. */ - if ( CUR.error && !CUR.instruction_trap ) - { - FT_TRACE1(( " The interpreter returned error 0x%x\n", CUR.error )); - exc->size->cvt_ready = FALSE; - } - - return CUR.error; - } - - -#endif /* TT_USE_BYTECODE_INTERPRETER */ - - -/* END */ |