XFA: merge patch from CL 815103002

Update freetype to 2.5.4.

Put freetype into third_party directory, cleaning up header files.

Previously freetype header files are in core/src/fxge/freetype and core/include/thirdparties. There were also multiple fx_freetype.h.

This patch removes the additional Foxit wrapper to make further update easier.

Notice, for original freetype source code, the following files are modified and need to be updated accordingly in future update:

third_party/freetype/include/config/ftmodule.h
third_party/freetype/include/config/ftoption.h

BUG=407341
R=thestig@chromium.org

Review URL: https://codereview.chromium.org/815103002

1 files changed, 377 insertions, 0 deletions

diff --git a/third_party/freetype/src/sfnt/pngshim.c b/third_party/freetype/src/sfnt/pngshim.c
new file mode 100644
index 0000000000..9bfcc2a779
--- /dev/null
+++ b/third_party/freetype/src/sfnt/pngshim.c
@@ -0,0 +1,377 @@
+/***************************************************************************/
+/*                                                                         */
+/*  pngshim.c                                                              */
+/*                                                                         */
+/*    PNG Bitmap glyph support.                                            */
+/*                                                                         */
+/*  Copyright 2013, 2014 by Google, Inc.                                   */
+/*  Written by Stuart Gill and Behdad Esfahbod.                            */
+/*                                                                         */
+/*  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_INTERNAL_STREAM_H
+#include FT_TRUETYPE_TAGS_H
+#include FT_CONFIG_STANDARD_LIBRARY_H
+
+
+#ifdef FT_CONFIG_OPTION_USE_PNG
+
+  /* We always include <stjmp.h>, so make libpng shut up! */
+#define PNG_SKIP_SETJMP_CHECK 1
+#include <png.h>
+#include "pngshim.h"
+
+#include "sferrors.h"
+
+
+  /* This code is freely based on cairo-png.c.  There's so many ways */
+  /* to call libpng, and the way cairo does it is defacto standard.  */
+
+  static int
+  multiply_alpha( int  alpha,
+                  int  color )
+  {
+    int  temp = ( alpha * color ) + 0x80;
+
+
+    return ( temp + ( temp >> 8 ) ) >> 8;
+  }
+
+
+  /* Premultiplies data and converts RGBA bytes => native endian. */
+  static void
+  premultiply_data( png_structp    png,
+                    png_row_infop  row_info,
+                    png_bytep      data )
+  {
+    unsigned int  i;
+
+    FT_UNUSED( png );
+
+
+    for ( i = 0; i < row_info->rowbytes; i += 4 )
+    {
+      unsigned char*  base  = &data[i];
+      unsigned int    alpha = base[3];
+
+
+      if ( alpha == 0 )
+        base[0] = base[1] = base[2] = base[3] = 0;
+
+      else
+      {
+        unsigned int  red   = base[0];
+        unsigned int  green = base[1];
+        unsigned int  blue  = base[2];
+
+
+        if ( alpha != 0xFF )
+        {
+          red   = multiply_alpha( alpha, red   );
+          green = multiply_alpha( alpha, green );
+          blue  = multiply_alpha( alpha, blue  );
+        }
+
+        base[0] = blue;
+        base[1] = green;
+        base[2] = red;
+        base[3] = alpha;
+      }
+    }
+  }
+
+
+  /* Converts RGBx bytes to BGRA. */
+  static void
+  convert_bytes_to_data( png_structp    png,
+                         png_row_infop  row_info,
+                         png_bytep      data )
+  {
+    unsigned int  i;
+
+    FT_UNUSED( png );
+
+
+    for ( i = 0; i < row_info->rowbytes; i += 4 )
+    {
+      unsigned char*  base  = &data[i];
+      unsigned int    red   = base[0];
+      unsigned int    green = base[1];
+      unsigned int    blue  = base[2];
+
+
+      base[0] = blue;
+      base[1] = green;
+      base[2] = red;
+      base[3] = 0xFF;
+    }
+  }
+
+
+  /* Use error callback to avoid png writing to stderr. */
+  static void
+  error_callback( png_structp      png,
+                  png_const_charp  error_msg )
+  {
+    FT_Error*  error = (FT_Error*)png_get_error_ptr( png );
+
+    FT_UNUSED( error_msg );
+
+
+    *error = FT_THROW( Out_Of_Memory );
+#ifdef PNG_SETJMP_SUPPORTED
+    ft_longjmp( png_jmpbuf( png ), 1 );
+#endif
+    /* if we get here, then we have no choice but to abort ... */
+  }
+
+
+  /* Use warning callback to avoid png writing to stderr. */
+  static void
+  warning_callback( png_structp      png,
+                    png_const_charp  error_msg )
+  {
+    FT_UNUSED( png );
+    FT_UNUSED( error_msg );
+
+    /* Just ignore warnings. */
+  }
+
+
+  static void
+  read_data_from_FT_Stream( png_structp  png,
+                            png_bytep    data,
+                            png_size_t   length )
+  {
+    FT_Error   error;
+    png_voidp  p      = png_get_io_ptr( png );
+    FT_Stream  stream = (FT_Stream)p;
+
+
+    if ( FT_FRAME_ENTER( length ) )
+    {
+      FT_Error*  e = (FT_Error*)png_get_error_ptr( png );
+
+
+      *e = FT_THROW( Invalid_Stream_Read );
+      png_error( png, NULL );
+
+      return;
+    }
+
+    memcpy( data, stream->cursor, length );
+
+    FT_FRAME_EXIT();
+  }
+
+
+  FT_LOCAL_DEF( FT_Error )
+  Load_SBit_Png( FT_GlyphSlot     slot,
+                 FT_Int           x_offset,
+                 FT_Int           y_offset,
+                 FT_Int           pix_bits,
+                 TT_SBit_Metrics  metrics,
+                 FT_Memory        memory,
+                 FT_Byte*         data,
+                 FT_UInt          png_len,
+                 FT_Bool          populate_map_and_metrics )
+  {
+    FT_Bitmap    *map   = &slot->bitmap;
+    FT_Error      error = FT_Err_Ok;
+    FT_StreamRec  stream;
+
+    png_structp  png;
+    png_infop    info;
+    png_uint_32  imgWidth, imgHeight;
+
+    int         bitdepth, color_type, interlace;
+    FT_Int      i;
+    png_byte*  *rows = NULL; /* pacify compiler */
+
+
+    if ( x_offset < 0 ||
+         y_offset < 0 )
+    {
+      error = FT_THROW( Invalid_Argument );
+      goto Exit;
+    }
+
+    if ( !populate_map_and_metrics                            &&
+         ( (FT_UInt)x_offset + metrics->width  > map->width ||
+           (FT_UInt)y_offset + metrics->height > map->rows  ||
+           pix_bits != 32                                   ||
+           map->pixel_mode != FT_PIXEL_MODE_BGRA            ) )
+    {
+      error = FT_THROW( Invalid_Argument );
+      goto Exit;
+    }
+
+    FT_Stream_OpenMemory( &stream, data, png_len );
+
+    png = png_create_read_struct( PNG_LIBPNG_VER_STRING,
+                                  &error,
+                                  error_callback,
+                                  warning_callback );
+    if ( !png )
+    {
+      error = FT_THROW( Out_Of_Memory );
+      goto Exit;
+    }
+
+    info = png_create_info_struct( png );
+    if ( !info )
+    {
+      error = FT_THROW( Out_Of_Memory );
+      png_destroy_read_struct( &png, NULL, NULL );
+      goto Exit;
+    }
+
+    if ( ft_setjmp( png_jmpbuf( png ) ) )
+    {
+      error = FT_THROW( Invalid_File_Format );
+      goto DestroyExit;
+    }
+
+    png_set_read_fn( png, &stream, read_data_from_FT_Stream );
+
+    png_read_info( png, info );
+    png_get_IHDR( png, info,
+                  &imgWidth, &imgHeight,
+                  &bitdepth, &color_type, &interlace,
+                  NULL, NULL );
+
+    if ( error                                        ||
+         ( !populate_map_and_metrics                &&
+           ( (FT_Int)imgWidth  != metrics->width  ||
+             (FT_Int)imgHeight != metrics->height ) ) )
+      goto DestroyExit;
+
+    if ( populate_map_and_metrics )
+    {
+      FT_Long  size;
+
+
+      metrics->width  = (FT_Int)imgWidth;
+      metrics->height = (FT_Int)imgHeight;
+
+      map->width      = metrics->width;
+      map->rows       = metrics->height;
+      map->pixel_mode = FT_PIXEL_MODE_BGRA;
+      map->pitch      = map->width * 4;
+      map->num_grays  = 256;
+
+      /* reject too large bitmaps similarly to the rasterizer */
+      if ( map->rows > 0x7FFF || map->width > 0x7FFF )
+      {
+        error = FT_THROW( Array_Too_Large );
+        goto DestroyExit;
+      }
+
+      /* this doesn't overflow: 0x7FFF * 0x7FFF * 4 < 2^32 */
+      size = map->rows * map->pitch;
+
+      error = ft_glyphslot_alloc_bitmap( slot, size );
+      if ( error )
+        goto DestroyExit;
+    }
+
+    /* convert palette/gray image to rgb */
+    if ( color_type == PNG_COLOR_TYPE_PALETTE )
+      png_set_palette_to_rgb( png );
+
+    /* expand gray bit depth if needed */
+    if ( color_type == PNG_COLOR_TYPE_GRAY )
+    {
+#if PNG_LIBPNG_VER >= 10209
+      png_set_expand_gray_1_2_4_to_8( png );
+#else
+      png_set_gray_1_2_4_to_8( png );
+#endif
+    }
+
+    /* transform transparency to alpha */
+    if ( png_get_valid(png, info, PNG_INFO_tRNS ) )
+      png_set_tRNS_to_alpha( png );
+
+    if ( bitdepth == 16 )
+      png_set_strip_16( png );
+
+    if ( bitdepth < 8 )
+      png_set_packing( png );
+
+    /* convert grayscale to RGB */
+    if ( color_type == PNG_COLOR_TYPE_GRAY       ||
+         color_type == PNG_COLOR_TYPE_GRAY_ALPHA )
+      png_set_gray_to_rgb( png );
+
+    if ( interlace != PNG_INTERLACE_NONE )
+      png_set_interlace_handling( png );
+
+    png_set_filler( png, 0xFF, PNG_FILLER_AFTER );
+
+    /* recheck header after setting EXPAND options */
+    png_read_update_info(png, info );
+    png_get_IHDR( png, info,
+                  &imgWidth, &imgHeight,
+                  &bitdepth, &color_type, &interlace,
+                  NULL, NULL );
+
+    if ( bitdepth != 8                              ||
+        !( color_type == PNG_COLOR_TYPE_RGB       ||
+           color_type == PNG_COLOR_TYPE_RGB_ALPHA ) )
+    {
+      error = FT_THROW( Invalid_File_Format );
+      goto DestroyExit;
+    }
+
+    switch ( color_type )
+    {
+    default:
+      /* Shouldn't happen, but fall through. */
+
+    case PNG_COLOR_TYPE_RGB_ALPHA:
+      png_set_read_user_transform_fn( png, premultiply_data );
+      break;
+
+    case PNG_COLOR_TYPE_RGB:
+      /* Humm, this smells.  Carry on though. */
+      png_set_read_user_transform_fn( png, convert_bytes_to_data );
+      break;
+    }
+
+    if ( FT_NEW_ARRAY( rows, imgHeight ) )
+    {
+      error = FT_THROW( Out_Of_Memory );
+      goto DestroyExit;
+    }
+
+    for ( i = 0; i < (FT_Int)imgHeight; i++ )
+      rows[i] = map->buffer + ( y_offset + i ) * map->pitch + x_offset * 4;
+
+    png_read_image( png, rows );
+
+    FT_FREE( rows );
+
+    png_read_end( png, info );
+
+  DestroyExit:
+    png_destroy_read_struct( &png, &info, NULL );
+    FT_Stream_Close( &stream );
+
+  Exit:
+    return error;
+  }
+
+#endif /* FT_CONFIG_OPTION_USE_PNG */
+
+
+/* END */