Update freetype to 2.5.4.

third_party/freetype/src/sfnt/pngshim.c

 /***************************************************************************/
 /*                                                                         */
 /*  pngshim.c                                                              */
 /*                                                                         */
 /*    PNG Bitmap glyph support.                                            */
 /*                                                                         */
-/*  Copyright 2013 by Google, Inc.                                         */
+/*  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 "../../include/ft2build.h"
-#include "../../include/freetype/internal/ftdebug.h"
-#include "../../include/freetype/internal/ftstream.h"
-#include "../../include/freetype/tttags.h"
-#include "../../include/freetype/config/ftstdlib.h"
+#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"
@@ skipping 81 matching lines @@
       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 = png_get_error_ptr( png );
+    FT_Error*  error = (FT_Error*)png_get_error_ptr( png );
 
     FT_UNUSED( error_msg );
 
 
     *error = FT_THROW( Out_Of_Memory );
 #ifdef PNG_SETJMP_SUPPORTED
-    longjmp( png_jmpbuf( png ), 1 );
+    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 = png_get_error_ptr( png );
+      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();
   }
 
 
-  static FT_Error
-  Load_SBit_Png( FT_Bitmap*       map,
+  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_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;
+    png_byte*  *rows = NULL; /* pacify compiler */
 
 
-    if ( x_offset < 0 || x_offset + metrics->width  > map->width ||
-         y_offset < 0 || y_offset + metrics->height > map->rows  ||
-         pix_bits != 32 || map->pixel_mode != FT_PIXEL_MODE_BGRA )
+    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 )
     {
@@ skipping 16 matching lines @@
     }
 
     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 != FT_Err_Ok                   ||
-         (FT_Int)imgWidth  != metrics->width  ||
-         (FT_Int)imgHeight != metrics->height )
+    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
@@ skipping 71 matching lines @@
     FT_Stream_Close( &stream );
 
   Exit:
     return error;
   }
 
 #endif /* FT_CONFIG_OPTION_USE_PNG */
 
 
 /* END */