ui/gfx/image/image_util.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/gfx/image/image_util.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "third_party/skia/include/core/SkBitmap.h"
   9 #include "ui/gfx/codec/jpeg_codec.h"
  10 #include "ui/gfx/image/image.h"
  11 #include "ui/gfx/image/image_skia.h"
  12
  13 namespace gfx {
  14
  15 // The iOS implementations of the JPEG functions are in image_util_ios.mm.
  16 #if !defined(OS_IOS)
  17 Image ImageFrom1xJPEGEncodedData(const unsigned char* input,
  18                                  size_t input_size) {
  19   scoped_ptr<SkBitmap> bitmap(gfx::JPEGCodec::Decode(input, input_size));
  20   if (bitmap.get())
  21     return Image::CreateFrom1xBitmap(*bitmap);
  22
  23   return Image();
  24 }
  25
  26 bool JPEG1xEncodedDataFromImage(const Image& image, int quality,
  27                               std::vector<unsigned char>* dst) {
  28   const gfx::ImageSkiaRep& image_skia_rep =
  29       image.AsImageSkia().GetRepresentation(ui::SCALE_FACTOR_100P);
  30   if (image_skia_rep.scale_factor() != ui::SCALE_FACTOR_100P)
  31     return false;
  32
  33   const SkBitmap& bitmap = image_skia_rep.sk_bitmap();
  34   SkAutoLockPixels bitmap_lock(bitmap);
  35
  36   if (!bitmap.readyToDraw())
  37     return false;
  38
  39   return gfx::JPEGCodec::Encode(
  40           reinterpret_cast<unsigned char*>(bitmap.getAddr32(0, 0)),
  41           gfx::JPEGCodec::FORMAT_SkBitmap, bitmap.width(),
  42           bitmap.height(),
  43           static_cast<int>(bitmap.rowBytes()), quality,
  44           dst);
  45 }
  46 #endif  // !defined(OS_IOS)
  47
  48 }