chromium-revert-jpeg-swizzle-r0.patch

   1 This reverts http://trac.webkit.org/changeset/101286
   2 to fix Gentoo bug https://bugs.gentoo.org/show_bug.cgi?id=393471
   3
   4 Index: third_party/WebKit/Source/WebCore/platform/image-decoders/jpeg/JPEGImageDecoder.cpp
   5 ===================================================================
   6 --- third_party/WebKit/Source/WebCore/platform/image-decoders/jpeg/JPEGImageDecoder.cpp (revision 96970)
   7 +++ third_party/WebKit/Source/WebCore/platform/image-decoders/jpeg/JPEGImageDecoder.cpp (revision 101286)
   8 @@ -63,20 +63,6 @@
   9
  10  #include <setjmp.h>
  11
  12 -#if CPU(BIG_ENDIAN) || CPU(MIDDLE_ENDIAN)
  13 -#define ASSUME_LITTLE_ENDIAN 0
  14 -#else
  15 -#define ASSUME_LITTLE_ENDIAN 1
  16 -#endif
  17 -
  18 -#if defined(JCS_EXTENSIONS) && ASSUME_LITTLE_ENDIAN
  19 -#define TURBO_JPEG_RGB_SWIZZLE
  20 -inline J_COLOR_SPACE rgbOutputColorSpace() { return JCS_EXT_BGRX; }
  21 -inline bool turboSwizzled(J_COLOR_SPACE colorSpace) { return colorSpace == rgbOutputColorSpace(); }
  22 -#else
  23 -inline J_COLOR_SPACE rgbOutputColorSpace() { return JCS_RGB; }
  24 -#endif
  25 -
  26  namespace WebCore {
  27
  28  struct decoder_error_mgr {
  29 @@ -235,11 +221,10 @@
  30                  // their color profile, CoreGraphics will "upsample" them
  31                  // again, resulting in horizontal distortions.
  32                  m_decoder->setIgnoreGammaAndColorProfile(true);
  33 -                m_info.out_color_space = JCS_RGB;
  34 -                break;
  35 +                // Note fall-through!
  36              case JCS_RGB:
  37              case JCS_YCbCr:
  38 -                m_info.out_color_space = rgbOutputColorSpace();
  39 +                m_info.out_color_space = JCS_RGB;
  40                  break;
  41              case JCS_CMYK:
  42              case JCS_YCCK:
  43 @@ -496,19 +481,6 @@
  44      }
  45
  46      jpeg_decompress_struct* info = m_reader->info();
  47 -
  48 -#if !ENABLE(IMAGE_DECODER_DOWN_SAMPLING) && defined(TURBO_JPEG_RGB_SWIZZLE)
  49 -    if (turboSwizzled(info->out_color_space)) {
  50 -         ASSERT(!m_scaled);
  51 -         while (info->output_scanline < info->output_height) {
  52 -             unsigned char* row = reinterpret_cast<unsigned char*>(buffer.getAddr(0, info->output_scanline));
  53 -             if (jpeg_read_scanlines(info, &row, 1) != 1)
  54 -                  return false;
  55 -         }
  56 -         return true;
  57 -     }
  58 -#endif
  59 -
  60      JSAMPARRAY samples = m_reader->samples();
  61
  62      while (info->output_scanline < info->output_height) {