Extract an independent webkit_support_gfx target.

webkit/support/webkit_support_gfx.h

 // Copyright (c) 2011 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.
 
 #ifndef WEBKIT_SUPPORT_WEBKIT_SUPPORT_GFX_H_
 #define WEBKIT_SUPPORT_WEBKIT_SUPPORT_GFX_H_
 
 #include <string>
 #include <vector>
 
 // TODO(darin): Remove once this #include has been upstreamed to ImageDiff.cpp.
 // ImageDiff.cpp expects that PATH_MAX has already been defined :-/
 #include <limits.h>
 
 namespace webkit_support {
 
+enum ColorFormat {

[tony, 2011/10/12 16:50:48]

Can we move this to the .cc file and put it in an anonymous namespace?

[HaoZheng, 2011/10/13 03:16:02]

Done.

+  // 3 bytes per pixel (packed), in RGB order regardless of endianness.
+  // This is the native JPEG format.
+  FORMAT_RGB,
+
+  // 4 bytes per pixel, in RGBA order in memory regardless of endianness.
+  FORMAT_RGBA,
+
+  // 4 bytes per pixel, in BGRA order in memory regardless of endianness.
+  // This is the default Windows DIB order.
+  FORMAT_BGRA,
+
+  // 4 bytes per pixel, in pre-multiplied kARGB_8888_Config format. For use
+  // with directly writing to a skia bitmap.
+  FORMAT_SkBitmap
+};
+
+// Represents a comment in the tEXt ancillary chunk of the png.
+struct Comment {

[tony, 2011/10/12 16:50:48]

This too.

[HaoZheng, 2011/10/13 03:16:02]

Done.

+  Comment(const std::string& k, const std::string& t);
+  ~Comment();
+
+  std::string key;
+  std::string text;
+};
+
 // Decode a PNG into an RGBA pixel array.
 bool DecodePNG(const unsigned char* input, size_t input_size,
                std::vector<unsigned char>* output,
                int* width, int* height);
 
 // Encode an RGBA pixel array into a PNG.
 bool EncodeRGBAPNG(const unsigned char* input,
                    int width,
                    int height,
                    int row_byte_width,
@@ skipping 11 matching lines @@
                                int width,
                                int height,
                                int row_byte_width,
                                bool discard_transparency,
                                const std::string& checksum,
                                std::vector<unsigned char>* output);
 
 }  // namespace webkit_support
 
 #endif  // WEBKIT_SUPPORT_WEBKIT_SUPPORT_GFX_H_