Get our color channels straight. The reason why the color swap was required...

skia/ext/bitmap_platform_device_mac.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "skia/ext/bitmap_platform_device_mac.h"
 
 #include <time.h>
 
 #include "base/ref_counted.h"
 #include "skia/ext/skia_utils_mac.h"
@@ skipping 29 matching lines @@
   } else {
     // Fill up available size.
     *size = available_size - *position;
   }
   return true;
 }
 
 static CGContextRef CGContextForData(void* data, int width, int height) {
   CGColorSpaceRef color_space =
       CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
+#define HAS_ARGB_SHIFTS(a, r, g, b) \
+            (SK_A32_SHIFT == (a) && SK_R32_SHIFT == (r) \
+             && SK_G32_SHIFT == (g) && SK_B32_SHIFT == (b))
+#if defined(SK_CPU_LENDIAN) && HAS_ARGB_SHIFTS(24, 16, 8, 0)
   // Allocate a bitmap context with 4 components per pixel (BGRA).  Apple
   // recommends these flags for improved CG performance.
   CGContextRef context =
       CGBitmapContextCreate(data, width, height, 8, width * 4,
                             color_space,
                             kCGImageAlphaPremultipliedFirst |
                                 kCGBitmapByteOrder32Host);
+#else
+#error We require that Skia's and CoreGraphics's recommended \
+       image memory layout match.
+#endif
+#undef HAS_ARGB_SHIFTS
   CGColorSpaceRelease(color_space);
 
   if (!context)
     return NULL;
 
   // Change the coordinate system to match WebCore's
   CGContextTranslateCTM(context, 0, height);
   CGContextScaleCTM(context, 1.0, -1.0);
 
   return context;
@@ skipping 272 matching lines @@
     for (int i = 0; i < height; i++) {
       size_t offset = (i + bitmap_start_y) * row_words + bitmap_start_x;
       for (int j = 0; j < width; j++) {
         adjustor(data + offset + j);
       }
     }
   }
 }
 
 }  // namespace skia