Introduce ui.dll / libui.so for the component build.

webkit/support/webkit_support_gfx.cc

+// 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.
+
+#include "webkit/support/webkit_support_gfx.h"
+
+#include "ui/gfx/codec/png_codec.h"
+#include "ui/gfx/size.h"
+
+namespace webkit_support {
+
+// 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) {
+  return gfx::PNGCodec::Decode(input, input_size, gfx::PNGCodec::FORMAT_RGBA,
+                               output, width, height);
+}
+
+// Encode an RGBA pixel array into a PNG.
+bool EncodeRGBAPNG(const unsigned char* input,
+                   int width,
+                   int height,
+                   int row_byte_width,
+                   std::vector<unsigned char>* output) {
+  return gfx::PNGCodec::Encode(input, gfx::PNGCodec::FORMAT_RGBA,
+      gfx::Size(width, height), row_byte_width, false,
+      std::vector<gfx::PNGCodec::Comment>(), output);
+}
+
+// Encode an BGRA pixel array into a PNG.
+bool EncodeBGRAPNG(const unsigned char* input,
+                   int width,
+                   int height,
+                   int row_byte_width,
+                   bool discard_transparency,
+                   std::vector<unsigned char>* output) {
+  return gfx::PNGCodec::Encode(input, gfx::PNGCodec::FORMAT_BGRA,
+      gfx::Size(width, height), row_byte_width, discard_transparency,
+      std::vector<gfx::PNGCodec::Comment>(), output);
+}
+
+bool EncodeBGRAPNGWithChecksum(const unsigned char* input,
+                               int width,
+                               int height,
+                               int row_byte_width,
+                               bool discard_transparency,
+                               const std::string& checksum,
+                               std::vector<unsigned char>* output) {
+  std::vector<gfx::PNGCodec::Comment> comments;
+  comments.push_back(gfx::PNGCodec::Comment("checksum", checksum));
+  return gfx::PNGCodec::Encode(input, gfx::PNGCodec::FORMAT_BGRA,
+      gfx::Size(width, height), row_byte_width, discard_transparency,
+      comments, output);
+}
+
+}  // namespace webkit_support