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path: root/third_party/freetype/src/cid/cidload.c
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Diffstat (limited to 'third_party/freetype/src/cid/cidload.c')
-rw-r--r--third_party/freetype/src/cid/cidload.c846
1 files changed, 0 insertions, 846 deletions
diff --git a/third_party/freetype/src/cid/cidload.c b/third_party/freetype/src/cid/cidload.c
deleted file mode 100644
index ff0722110d..0000000000
--- a/third_party/freetype/src/cid/cidload.c
+++ /dev/null
@@ -1,846 +0,0 @@
-/***************************************************************************/
-/* */
-/* cidload.c */
-/* */
-/* CID-keyed Type1 font loader (body). */
-/* */
-/* Copyright 1996-2017 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. */
-/* */
-/***************************************************************************/
-
-
-#include <ft2build.h>
-#include FT_INTERNAL_DEBUG_H
-#include FT_CONFIG_CONFIG_H
-#include FT_MULTIPLE_MASTERS_H
-#include FT_INTERNAL_TYPE1_TYPES_H
-
-#include "cidload.h"
-
-#include "ciderrs.h"
-
-
- /*************************************************************************/
- /* */
- /* 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_cidload
-
-
- /* read a single offset */
- FT_LOCAL_DEF( FT_ULong )
- cid_get_offset( FT_Byte* *start,
- FT_Byte offsize )
- {
- FT_ULong result;
- FT_Byte* p = *start;
-
-
- for ( result = 0; offsize > 0; offsize-- )
- {
- result <<= 8;
- result |= *p++;
- }
-
- *start = p;
- return result;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** TYPE 1 SYMBOL PARSING *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
-
- static FT_Error
- cid_load_keyword( CID_Face face,
- CID_Loader* loader,
- const T1_Field keyword )
- {
- FT_Error error;
- CID_Parser* parser = &loader->parser;
- FT_Byte* object;
- void* dummy_object;
- CID_FaceInfo cid = &face->cid;
-
-
- /* if the keyword has a dedicated callback, call it */
- if ( keyword->type == T1_FIELD_TYPE_CALLBACK )
- {
- keyword->reader( (FT_Face)face, parser );
- error = parser->root.error;
- goto Exit;
- }
-
- /* we must now compute the address of our target object */
- switch ( keyword->location )
- {
- case T1_FIELD_LOCATION_CID_INFO:
- object = (FT_Byte*)cid;
- break;
-
- case T1_FIELD_LOCATION_FONT_INFO:
- object = (FT_Byte*)&cid->font_info;
- break;
-
- case T1_FIELD_LOCATION_FONT_EXTRA:
- object = (FT_Byte*)&face->font_extra;
- break;
-
- case T1_FIELD_LOCATION_BBOX:
- object = (FT_Byte*)&cid->font_bbox;
- break;
-
- default:
- {
- CID_FaceDict dict;
-
-
- if ( parser->num_dict < 0 || parser->num_dict >= cid->num_dicts )
- {
- FT_ERROR(( "cid_load_keyword: invalid use of `%s'\n",
- keyword->ident ));
- error = FT_THROW( Syntax_Error );
- goto Exit;
- }
-
- dict = cid->font_dicts + parser->num_dict;
- switch ( keyword->location )
- {
- case T1_FIELD_LOCATION_PRIVATE:
- object = (FT_Byte*)&dict->private_dict;
- break;
-
- default:
- object = (FT_Byte*)dict;
- }
- }
- }
-
- dummy_object = object;
-
- /* now, load the keyword data in the object's field(s) */
- if ( keyword->type == T1_FIELD_TYPE_INTEGER_ARRAY ||
- keyword->type == T1_FIELD_TYPE_FIXED_ARRAY )
- error = cid_parser_load_field_table( &loader->parser, keyword,
- &dummy_object );
- else
- error = cid_parser_load_field( &loader->parser,
- keyword, &dummy_object );
- Exit:
- return error;
- }
-
-
- FT_CALLBACK_DEF( FT_Error )
- cid_parse_font_matrix( CID_Face face,
- CID_Parser* parser )
- {
- CID_FaceDict dict;
- FT_Face root = (FT_Face)&face->root;
- FT_Fixed temp[6];
- FT_Fixed temp_scale;
-
-
- if ( parser->num_dict >= 0 && parser->num_dict < face->cid.num_dicts )
- {
- FT_Matrix* matrix;
- FT_Vector* offset;
- FT_Int result;
-
-
- dict = face->cid.font_dicts + parser->num_dict;
- matrix = &dict->font_matrix;
- offset = &dict->font_offset;
-
- /* input is scaled by 1000 to accommodate default FontMatrix */
- result = cid_parser_to_fixed_array( parser, 6, temp, 3 );
-
- if ( result < 6 )
- return FT_THROW( Invalid_File_Format );
-
- temp_scale = FT_ABS( temp[3] );
-
- if ( temp_scale == 0 )
- {
- FT_ERROR(( "cid_parse_font_matrix: invalid font matrix\n" ));
- return FT_THROW( Invalid_File_Format );
- }
-
- /* atypical case */
- if ( temp_scale != 0x10000L )
- {
- /* set units per EM based on FontMatrix values */
- root->units_per_EM = (FT_UShort)FT_DivFix( 1000, temp_scale );
-
- temp[0] = FT_DivFix( temp[0], temp_scale );
- temp[1] = FT_DivFix( temp[1], temp_scale );
- temp[2] = FT_DivFix( temp[2], temp_scale );
- temp[4] = FT_DivFix( temp[4], temp_scale );
- temp[5] = FT_DivFix( temp[5], temp_scale );
- temp[3] = temp[3] < 0 ? -0x10000L : 0x10000L;
- }
-
- matrix->xx = temp[0];
- matrix->yx = temp[1];
- matrix->xy = temp[2];
- matrix->yy = temp[3];
-
- /* note that the font offsets are expressed in integer font units */
- offset->x = temp[4] >> 16;
- offset->y = temp[5] >> 16;
- }
-
- return FT_Err_Ok;
- }
-
-
- FT_CALLBACK_DEF( FT_Error )
- parse_fd_array( CID_Face face,
- CID_Parser* parser )
- {
- CID_FaceInfo cid = &face->cid;
- FT_Memory memory = face->root.memory;
- FT_Stream stream = parser->stream;
- FT_Error error = FT_Err_Ok;
- FT_Long num_dicts;
-
-
- num_dicts = cid_parser_to_int( parser );
- if ( num_dicts < 0 )
- {
- FT_ERROR(( "parse_fd_array: invalid number of dictionaries\n" ));
- error = FT_THROW( Invalid_File_Format );
- goto Exit;
- }
-
- /*
- * A single entry in the FDArray must (at least) contain the following
- * structure elements.
- *
- * %ADOBeginFontDict 18
- * X dict begin 13
- * /FontMatrix [X X X X] 22
- * /Private X dict begin 22
- * end 4
- * end 4
- * %ADOEndFontDict 16
- *
- * This needs 18+13+22+22+4+4+16=99 bytes or more. Normally, you also
- * need a `dup X' at the very beginning and a `put' at the end, so a
- * rough guess using 100 bytes as the minimum is justified.
- */
- if ( (FT_ULong)num_dicts > stream->size / 100 )
- {
- FT_TRACE0(( "parse_fd_array: adjusting FDArray size"
- " (from %d to %d)\n",
- num_dicts,
- stream->size / 100 ));
- num_dicts = (FT_Long)( stream->size / 100 );
- }
-
- if ( !cid->font_dicts )
- {
- FT_Int n;
-
-
- if ( FT_NEW_ARRAY( cid->font_dicts, num_dicts ) )
- goto Exit;
-
- cid->num_dicts = num_dicts;
-
- /* don't forget to set a few defaults */
- for ( n = 0; n < cid->num_dicts; n++ )
- {
- CID_FaceDict dict = cid->font_dicts + n;
-
-
- /* default value for lenIV */
- dict->private_dict.lenIV = 4;
- }
- }
-
- Exit:
- return error;
- }
-
-
- /* by mistake, `expansion_factor' appears both in PS_PrivateRec */
- /* and CID_FaceDictRec (both are public header files and can't */
- /* changed); we simply copy the value */
-
- FT_CALLBACK_DEF( FT_Error )
- parse_expansion_factor( CID_Face face,
- CID_Parser* parser )
- {
- CID_FaceDict dict;
-
-
- if ( parser->num_dict >= 0 && parser->num_dict < face->cid.num_dicts )
- {
- dict = face->cid.font_dicts + parser->num_dict;
-
- dict->expansion_factor = cid_parser_to_fixed( parser, 0 );
- dict->private_dict.expansion_factor = dict->expansion_factor;
- }
-
- return FT_Err_Ok;
- }
-
-
- static
- const T1_FieldRec cid_field_records[] =
- {
-
-#include "cidtoken.h"
-
- T1_FIELD_CALLBACK( "FDArray", parse_fd_array, 0 )
- T1_FIELD_CALLBACK( "FontMatrix", cid_parse_font_matrix, 0 )
- T1_FIELD_CALLBACK( "ExpansionFactor", parse_expansion_factor, 0 )
-
- { 0, T1_FIELD_LOCATION_CID_INFO, T1_FIELD_TYPE_NONE, 0, 0, 0, 0, 0, 0 }
- };
-
-
- static FT_Error
- cid_parse_dict( CID_Face face,
- CID_Loader* loader,
- FT_Byte* base,
- FT_ULong size )
- {
- CID_Parser* parser = &loader->parser;
-
-
- parser->root.cursor = base;
- parser->root.limit = base + size;
- parser->root.error = FT_Err_Ok;
-
- {
- FT_Byte* cur = base;
- FT_Byte* limit = cur + size;
-
-
- for (;;)
- {
- FT_Byte* newlimit;
-
-
- parser->root.cursor = cur;
- cid_parser_skip_spaces( parser );
-
- if ( parser->root.cursor >= limit )
- newlimit = limit - 1 - 17;
- else
- newlimit = parser->root.cursor - 17;
-
- /* look for `%ADOBeginFontDict' */
- for ( ; cur < newlimit; cur++ )
- {
- if ( *cur == '%' &&
- ft_strncmp( (char*)cur, "%ADOBeginFontDict", 17 ) == 0 )
- {
- /* if /FDArray was found, then cid->num_dicts is > 0, and */
- /* we can start increasing parser->num_dict */
- if ( face->cid.num_dicts > 0 )
- parser->num_dict++;
- }
- }
-
- cur = parser->root.cursor;
- /* no error can occur in cid_parser_skip_spaces */
- if ( cur >= limit )
- break;
-
- cid_parser_skip_PS_token( parser );
- if ( parser->root.cursor >= limit || parser->root.error )
- break;
-
- /* look for immediates */
- if ( *cur == '/' && cur + 2 < limit )
- {
- FT_UInt len;
-
-
- cur++;
- len = (FT_UInt)( parser->root.cursor - cur );
-
- if ( len > 0 && len < 22 )
- {
- /* now compare the immediate name to the keyword table */
- T1_Field keyword = (T1_Field)cid_field_records;
-
-
- for (;;)
- {
- FT_Byte* name;
-
-
- name = (FT_Byte*)keyword->ident;
- if ( !name )
- break;
-
- if ( cur[0] == name[0] &&
- len == ft_strlen( (const char*)name ) )
- {
- FT_UInt n;
-
-
- for ( n = 1; n < len; n++ )
- if ( cur[n] != name[n] )
- break;
-
- if ( n >= len )
- {
- /* we found it - run the parsing callback */
- parser->root.error = cid_load_keyword( face,
- loader,
- keyword );
- if ( parser->root.error )
- return parser->root.error;
- break;
- }
- }
- keyword++;
- }
- }
- }
-
- cur = parser->root.cursor;
- }
-
- if ( !face->cid.num_dicts )
- {
- FT_ERROR(( "cid_parse_dict: No font dictionary found\n" ));
- return FT_THROW( Invalid_File_Format );
- }
- }
-
- return parser->root.error;
- }
-
-
- /* read the subrmap and the subrs of each font dict */
- static FT_Error
- cid_read_subrs( CID_Face face )
- {
- CID_FaceInfo cid = &face->cid;
- FT_Memory memory = face->root.memory;
- FT_Stream stream = face->cid_stream;
- FT_Error error;
- FT_Int n;
- CID_Subrs subr;
- FT_UInt max_offsets = 0;
- FT_ULong* offsets = NULL;
- PSAux_Service psaux = (PSAux_Service)face->psaux;
-
-
- if ( FT_NEW_ARRAY( face->subrs, cid->num_dicts ) )
- goto Exit;
-
- subr = face->subrs;
- for ( n = 0; n < cid->num_dicts; n++, subr++ )
- {
- CID_FaceDict dict = cid->font_dicts + n;
- FT_Int lenIV = dict->private_dict.lenIV;
- FT_UInt count, num_subrs = dict->num_subrs;
- FT_ULong data_len;
- FT_Byte* p;
-
-
- if ( !num_subrs )
- continue;
-
- /* reallocate offsets array if needed */
- if ( num_subrs + 1 > max_offsets )
- {
- FT_UInt new_max = FT_PAD_CEIL( num_subrs + 1, 4 );
-
-
- if ( new_max <= max_offsets )
- {
- error = FT_THROW( Syntax_Error );
- goto Fail;
- }
-
- if ( FT_RENEW_ARRAY( offsets, max_offsets, new_max ) )
- goto Fail;
-
- max_offsets = new_max;
- }
-
- /* read the subrmap's offsets */
- if ( FT_STREAM_SEEK( cid->data_offset + dict->subrmap_offset ) ||
- FT_FRAME_ENTER( ( num_subrs + 1 ) * (FT_UInt)dict->sd_bytes ) )
- goto Fail;
-
- p = (FT_Byte*)stream->cursor;
- for ( count = 0; count <= num_subrs; count++ )
- offsets[count] = cid_get_offset( &p, (FT_Byte)dict->sd_bytes );
-
- FT_FRAME_EXIT();
-
- /* offsets must be ordered */
- for ( count = 1; count <= num_subrs; count++ )
- if ( offsets[count - 1] > offsets[count] )
- {
- FT_ERROR(( "cid_read_subrs: offsets are not ordered\n" ));
- error = FT_THROW( Invalid_File_Format );
- goto Fail;
- }
-
- if ( offsets[num_subrs] > stream->size - cid->data_offset )
- {
- FT_ERROR(( "cid_read_subrs: too large `subrs' offsets\n" ));
- error = FT_THROW( Invalid_File_Format );
- goto Fail;
- }
-
- /* now, compute the size of subrs charstrings, */
- /* allocate, and read them */
- data_len = offsets[num_subrs] - offsets[0];
-
- if ( FT_NEW_ARRAY( subr->code, num_subrs + 1 ) ||
- FT_ALLOC( subr->code[0], data_len ) )
- goto Fail;
-
- if ( FT_STREAM_SEEK( cid->data_offset + offsets[0] ) ||
- FT_STREAM_READ( subr->code[0], data_len ) )
- goto Fail;
-
- /* set up pointers */
- for ( count = 1; count <= num_subrs; count++ )
- {
- FT_ULong len;
-
-
- len = offsets[count] - offsets[count - 1];
- subr->code[count] = subr->code[count - 1] + len;
- }
-
- /* decrypt subroutines, but only if lenIV >= 0 */
- if ( lenIV >= 0 )
- {
- for ( count = 0; count < num_subrs; count++ )
- {
- FT_ULong len;
-
-
- len = offsets[count + 1] - offsets[count];
- psaux->t1_decrypt( subr->code[count], len, 4330 );
- }
- }
-
- subr->num_subrs = (FT_Int)num_subrs;
- }
-
- Exit:
- FT_FREE( offsets );
- return error;
-
- Fail:
- if ( face->subrs )
- {
- for ( n = 0; n < cid->num_dicts; n++ )
- {
- if ( face->subrs[n].code )
- FT_FREE( face->subrs[n].code[0] );
-
- FT_FREE( face->subrs[n].code );
- }
- FT_FREE( face->subrs );
- }
- goto Exit;
- }
-
-
- static void
- cid_init_loader( CID_Loader* loader,
- CID_Face face )
- {
- FT_UNUSED( face );
-
- FT_ZERO( loader );
- }
-
-
- static void
- cid_done_loader( CID_Loader* loader )
- {
- CID_Parser* parser = &loader->parser;
-
-
- /* finalize parser */
- cid_parser_done( parser );
- }
-
-
- static FT_Error
- cid_hex_to_binary( FT_Byte* data,
- FT_ULong data_len,
- FT_ULong offset,
- CID_Face face )
- {
- FT_Stream stream = face->root.stream;
- FT_Error error;
-
- FT_Byte buffer[256];
- FT_Byte *p, *plimit;
- FT_Byte *d, *dlimit;
- FT_Byte val;
-
- FT_Bool upper_nibble, done;
-
-
- if ( FT_STREAM_SEEK( offset ) )
- goto Exit;
-
- d = data;
- dlimit = d + data_len;
- p = buffer;
- plimit = p;
-
- upper_nibble = 1;
- done = 0;
-
- while ( d < dlimit )
- {
- if ( p >= plimit )
- {
- FT_ULong oldpos = FT_STREAM_POS();
- FT_ULong size = stream->size - oldpos;
-
-
- if ( size == 0 )
- {
- error = FT_THROW( Syntax_Error );
- goto Exit;
- }
-
- if ( FT_STREAM_READ( buffer, 256 > size ? size : 256 ) )
- goto Exit;
- p = buffer;
- plimit = p + FT_STREAM_POS() - oldpos;
- }
-
- if ( ft_isdigit( *p ) )
- val = (FT_Byte)( *p - '0' );
- else if ( *p >= 'a' && *p <= 'f' )
- val = (FT_Byte)( *p - 'a' );
- else if ( *p >= 'A' && *p <= 'F' )
- val = (FT_Byte)( *p - 'A' + 10 );
- else if ( *p == ' ' ||
- *p == '\t' ||
- *p == '\r' ||
- *p == '\n' ||
- *p == '\f' ||
- *p == '\0' )
- {
- p++;
- continue;
- }
- else if ( *p == '>' )
- {
- val = 0;
- done = 1;
- }
- else
- {
- error = FT_THROW( Syntax_Error );
- goto Exit;
- }
-
- if ( upper_nibble )
- *d = (FT_Byte)( val << 4 );
- else
- {
- *d = (FT_Byte)( *d + val );
- d++;
- }
-
- upper_nibble = (FT_Byte)( 1 - upper_nibble );
-
- if ( done )
- break;
-
- p++;
- }
-
- error = FT_Err_Ok;
-
- Exit:
- return error;
- }
-
-
- FT_LOCAL_DEF( FT_Error )
- cid_face_open( CID_Face face,
- FT_Int face_index )
- {
- CID_Loader loader;
- CID_Parser* parser;
- FT_Memory memory = face->root.memory;
- FT_Error error;
- FT_Int n;
-
- CID_FaceInfo cid = &face->cid;
-
- FT_ULong binary_length;
- FT_ULong entry_len;
-
-
- cid_init_loader( &loader, face );
-
- parser = &loader.parser;
- error = cid_parser_new( parser, face->root.stream, face->root.memory,
- (PSAux_Service)face->psaux );
- if ( error )
- goto Exit;
-
- error = cid_parse_dict( face, &loader,
- parser->postscript,
- parser->postscript_len );
- if ( error )
- goto Exit;
-
- if ( face_index < 0 )
- goto Exit;
-
- if ( FT_NEW( face->cid_stream ) )
- goto Exit;
-
- if ( parser->binary_length )
- {
- if ( parser->binary_length >
- face->root.stream->size - parser->data_offset )
- {
- FT_TRACE0(( "cid_face_open: adjusting length of binary data\n"
- " (from %d to %d bytes)\n",
- parser->binary_length,
- face->root.stream->size - parser->data_offset ));
- parser->binary_length = face->root.stream->size -
- parser->data_offset;
- }
-
- /* we must convert the data section from hexadecimal to binary */
- if ( FT_ALLOC( face->binary_data, parser->binary_length ) ||
- FT_SET_ERROR( cid_hex_to_binary( face->binary_data,
- parser->binary_length,
- parser->data_offset,
- face ) ) )
- goto Exit;
-
- FT_Stream_OpenMemory( face->cid_stream,
- face->binary_data, parser->binary_length );
- cid->data_offset = 0;
- }
- else
- {
- *face->cid_stream = *face->root.stream;
- cid->data_offset = loader.parser.data_offset;
- }
-
- /* sanity tests */
-
- if ( cid->fd_bytes < 0 || cid->gd_bytes < 1 )
- {
- FT_ERROR(( "cid_parse_dict:"
- " Invalid `FDBytes' or `GDBytes' value\n" ));
- error = FT_THROW( Invalid_File_Format );
- goto Exit;
- }
-
- /* allow at most 32bit offsets */
- if ( cid->fd_bytes > 4 || cid->gd_bytes > 4 )
- {
- FT_ERROR(( "cid_parse_dict:"
- " Values of `FDBytes' or `GDBytes' larger than 4\n"
- " "
- " are not supported\n" ));
- error = FT_THROW( Invalid_File_Format );
- goto Exit;
- }
-
- binary_length = face->cid_stream->size - cid->data_offset;
- entry_len = (FT_ULong)( cid->fd_bytes + cid->gd_bytes );
-
- for ( n = 0; n < cid->num_dicts; n++ )
- {
- CID_FaceDict dict = cid->font_dicts + n;
-
-
- if ( dict->sd_bytes < 0 ||
- ( dict->num_subrs && dict->sd_bytes < 1 ) )
- {
- FT_ERROR(( "cid_parse_dict: Invalid `SDBytes' value\n" ));
- error = FT_THROW( Invalid_File_Format );
- goto Exit;
- }
-
- if ( dict->sd_bytes > 4 )
- {
- FT_ERROR(( "cid_parse_dict:"
- " Values of `SDBytes' larger than 4"
- " are not supported\n" ));
- error = FT_THROW( Invalid_File_Format );
- goto Exit;
- }
-
- if ( dict->subrmap_offset > binary_length )
- {
- FT_ERROR(( "cid_parse_dict: Invalid `SubrMapOffset' value\n" ));
- error = FT_THROW( Invalid_File_Format );
- goto Exit;
- }
-
- /* `num_subrs' is scanned as a signed integer */
- if ( (FT_Int)dict->num_subrs < 0 ||
- ( dict->sd_bytes &&
- dict->num_subrs > ( binary_length - dict->subrmap_offset ) /
- (FT_UInt)dict->sd_bytes ) )
- {
- FT_ERROR(( "cid_parse_dict: Invalid `SubrCount' value\n" ));
- error = FT_THROW( Invalid_File_Format );
- goto Exit;
- }
- }
-
- if ( cid->cidmap_offset > binary_length )
- {
- FT_ERROR(( "cid_parse_dict: Invalid `CIDMapOffset' value\n" ));
- error = FT_THROW( Invalid_File_Format );
- goto Exit;
- }
-
- if ( entry_len &&
- cid->cid_count >
- ( binary_length - cid->cidmap_offset ) / entry_len )
- {
- FT_ERROR(( "cid_parse_dict: Invalid `CIDCount' value\n" ));
- error = FT_THROW( Invalid_File_Format );
- goto Exit;
- }
-
- /* we can now safely proceed */
- error = cid_read_subrs( face );
-
- Exit:
- cid_done_loader( &loader );
- return error;
- }
-
-
-/* END */
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-08 06:15:34 +0000