third_party/WebKit/Source/platform/graphics/ImageDataBuffer.h

/*
 * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
 * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
 * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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.
 */

#ifndef ImageDataBuffer_h
#define ImageDataBuffer_h

#include <memory>
#include "base/memory/scoped_refptr.h"
#include "platform/PlatformExport.h"
#include "platform/geometry/FloatRect.h"
#include "platform/geometry/IntSize.h"
#include "platform/graphics/StaticBitmapImage.h"
#include "platform/wtf/Vector.h"
#include "platform/wtf/text/WTFString.h"
#include "platform/wtf/typed_arrays/Uint8ClampedArray.h"
#include "third_party/skia/include/core/SkRefCnt.h"

namespace blink {

class PLATFORM_EXPORT ImageDataBuffer {
 public:
  static std::unique_ptr<ImageDataBuffer> Create(
      scoped_refptr<StaticBitmapImage>);
  static std::unique_ptr<ImageDataBuffer> Create(
      const IntSize&,
      const unsigned char*,
      const CanvasColorParams& = CanvasColorParams());
  static std::unique_ptr<ImageDataBuffer> Create(const SkPixmap&);

  String ToDataURL(const String& mime_type, const double& quality) const;
  bool EncodeImage(const String& mime_type,
                   const double& quality,
                   Vector<unsigned char>* encoded_image) const;
  const unsigned char* Pixels() const;
  const IntSize& size() const { return size_; }
  int Height() const { return size_.Height(); }
  int Width() const { return size_.Width(); }

 private:
  ImageDataBuffer(const IntSize&,
                  const unsigned char*,
                  const CanvasColorParams&);
  ImageDataBuffer(const SkPixmap&);
  ImageDataBuffer(scoped_refptr<StaticBitmapImage>);

  bool IsValid() { return is_valid_; }  // Only used by Create()

  const unsigned char* data_;
  const CanvasColorParams color_params_;
  sk_sp<SkImage> retained_image_;
  SkPixmap pixmap_;
  bool uses_pixmap_ = false;
  bool is_valid_ = false;
  IntSize size_;
};

}  // namespace blink

#endif  // ImageDataBuffer_h