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_png_rep.h" 6 7 #include "base/logging.h" 8 #include "third_party/skia/include/core/SkBitmap.h" 9 #include "ui/gfx/codec/png_codec.h" 10 #include "ui/gfx/size.h" 11 12 namespace gfx { 13 14 ImagePNGRep::ImagePNGRep() 15 : raw_data(NULL), 16 scale(1.0) { 17 } 18 19 ImagePNGRep::ImagePNGRep(const scoped_refptr<base::RefCountedMemory>& data, 20 float data_scale) 21 : raw_data(data), 22 scale(data_scale) { 23 } 24 25 ImagePNGRep::~ImagePNGRep() { 26 } 27 28 gfx::Size ImagePNGRep::Size() const { 29 // The only way to get the width and height of a raw PNG stream, at least 30 // using the gfx::PNGCodec API, is to decode the whole thing. 31 CHECK(raw_data.get()); 32 SkBitmap bitmap; 33 if (!gfx::PNGCodec::Decode(raw_data->front(), raw_data->size(), 34 &bitmap)) { 35 LOG(ERROR) << "Unable to decode PNG."; 36 return gfx::Size(0, 0); 37 } 38 return gfx::Size(bitmap.width(), bitmap.height()); 39 } 40 41 } // namespace gfx 42
