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

/*
 * Copyright (C) 2008 Apple Computer, 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:
 * 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 GeneratedImage_h
#define GeneratedImage_h

#include "platform/geometry/LayoutSize.h"
#include "platform/graphics/Image.h"
#include "third_party/skia/include/core/SkRefCnt.h"

namespace blink {

class PLATFORM_EXPORT GeneratedImage : public Image {
 public:
  bool CurrentFrameHasSingleSecurityOrigin() const override { return true; }

  bool UsesContainerSize() const override { return true; }
  bool HasRelativeSize() const override { return true; }

  IntSize Size() const override { return RoundedIntSize(size_); }

  // Assume that generated content has no decoded data we need to worry about
  void DestroyDecodedData() override {}

  PaintImage PaintImageForCurrentFrame() override;

 protected:
  void DrawPattern(GraphicsContext&,
                   const FloatRect&,
                   const FloatSize&,
                   const FloatPoint&,
                   SkBlendMode,
                   const FloatRect&,
                   const FloatSize& repeat_spacing) final;

  // FIXME: Implement this to be less conservative.
  bool CurrentFrameKnownToBeOpaque(
      MetadataMode = kUseCurrentMetadata) override {
    return false;
  }

  GeneratedImage(const FloatSize& size) : size_(size) {}

  virtual void DrawTile(GraphicsContext&, const FloatRect&) = 0;

  FloatSize size_;
};

}  // namespace blink

#endif