Move the JPEG and PNG codecs from base/gfx to app/gfx/codec. Move the classes...

base/gfx/png_encoder.h

-// 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.
-
-#ifndef BASE_GFX_PNG_ENCODER_H_
-#define BASE_GFX_PNG_ENCODER_H_
-
-#include <vector>
-
-#include "base/basictypes.h"
-
-class SkBitmap;
-
-// Interface for encoding PNG data. This is a wrapper around libpng,
-// which has an inconvenient interface for callers. This is currently designed
-// for use in tests only (where we control the files), so the handling isn't as
-// robust as would be required for a browser (see Decode() for more).  WebKit
-// has its own more complicated PNG decoder which handles, among other things,
-// partially downloaded data.
-class PNGEncoder {
- public:
-  enum ColorFormat {
-    // 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
-  };
-
-  // Encodes the given raw 'input' data, with each pixel being represented as
-  // given in 'format'. The encoded PNG data will be written into the supplied
-  // vector and true will be returned on success. On failure (false), the
-  // contents of the output buffer are undefined.
-  //
-  // When writing alpha values, the input colors are assumed to be post
-  // multiplied.
-  //
-  // w, h: dimensions of the image
-  // row_byte_width: the width in bytes of each row. This may be greater than
-  //   w * bytes_per_pixel if there is extra padding at the end of each row
-  //   (often, each row is padded to the next machine word).
-  // discard_transparency: when true, and when the input data format includes
-  //   alpha values, these alpha values will be discarded and only RGB will be
-  //   written to the resulting file. Otherwise, alpha values in the input
-  //   will be preserved.
-  static bool Encode(const unsigned char* input, ColorFormat format,
-                     int w, int h, int row_byte_width,
-                     bool discard_transparency,
-                     std::vector<unsigned char>* output);
-
-  // Call PNGEncoder::Encode on the supplied SkBitmap |input|, which is assumed
-  // to be BGRA, 32 bits per pixel. The params |discard_transparency| and
-  // |output| are passed directly to Encode; refer to Encode for more
-  // information. During the call, an SkAutoLockPixels lock is held on |input|.
-  static bool EncodeBGRASkBitmap(const SkBitmap& input,
-                                 bool discard_transparency,
-                                 std::vector<unsigned char>* output);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(PNGEncoder);
-};
-
-#endif  // BASE_GFX_PNG_ENCODER_H_