Use SkPngEncoder and SkWebpEncoder in WebKit platform

third_party/WebKit/Source/platform/image-encoders/WEBPImageEncoder.cpp

-/*
- * Copyright (c) 2011, Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "platform/image-encoders/WEBPImageEncoder.h"
-
-#include "platform/geometry/IntSize.h"
-#include "platform/graphics/ImageBuffer.h"
-#include "webp/encode.h"
-
-namespace blink {
-
-static int WriteOutput(const uint8_t* data,
-                       size_t size,
-                       const WebPPicture* const picture) {
-  static_cast<Vector<unsigned char>*>(picture->custom_ptr)->Append(data, size);
-  return 1;
-}
-
-static bool EncodePixels(const IntSize& image_size,
-                         const unsigned char* pixels,
-                         int quality,
-                         Vector<unsigned char>* output) {
-  if (image_size.Width() <= 0 || image_size.Width() > WEBP_MAX_DIMENSION)
-    return false;
-  if (image_size.Height() <= 0 || image_size.Height() > WEBP_MAX_DIMENSION)
-    return false;
-
-  WebPConfig config;
-  if (!WebPConfigInit(&config))
-    return false;
-  WebPPicture picture;
-  if (!WebPPictureInit(&picture))
-    return false;
-
-  picture.width = image_size.Width();
-  picture.height = image_size.Height();
-
-  bool use_lossless_encoding = (quality >= 100);
-  if (use_lossless_encoding)
-    picture.use_argb = 1;
-  if (!WebPPictureImportRGBA(&picture, pixels, picture.width * 4))
-    return false;
-
-  picture.custom_ptr = output;
-  picture.writer = &WriteOutput;
-
-  if (use_lossless_encoding) {
-    config.lossless = 1;
-    config.quality = 75;
-    config.method = 0;
-  } else {
-    config.quality = quality;
-    config.method = 3;
-  }
-
-  bool success = WebPEncode(&config, &picture);
-  WebPPictureFree(&picture);
-  return success;
-}
-
-bool WEBPImageEncoder::Encode(const ImageDataBuffer& image_data,
-                              int quality,
-                              Vector<unsigned char>* output) {
-  if (!image_data.Pixels())
-    return false;
-
-  return EncodePixels(image_data.size(), image_data.Pixels(), quality, output);
-}
-
-}  // namespace blink