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/*
* Copyright (C) 2013 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:
* 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 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 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 THIRD_PARTY_BLINK_RENDERER_CORE_SVG_GRAPHICS_SVG_IMAGE_FOR_CONTAINER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_SVG_GRAPHICS_SVG_IMAGE_FOR_CONTAINER_H_
#include "third_party/blink/renderer/core/svg/graphics/svg_image.h"
#include "third_party/blink/renderer/platform/geometry/float_rect.h"
#include "third_party/blink/renderer/platform/geometry/float_size.h"
#include "third_party/blink/renderer/platform/graphics/image.h"
#include "third_party/blink/renderer/platform/weborigin/kurl.h"
#include "third_party/skia/include/core/SkRefCnt.h"
namespace blink {
// SVGImageForContainer contains a reference to an SVGImage and includes context
// about how the image is being used (size, fragment identifier).
//
// The concrete size of an SVG image is calculated based on the image itself and
// the dimensions where the image is used (see: SVGImage::ConcreteObjectSize).
// This concrete size cannot be stored on the SVGImage itself because only a
// single SVGImage is created per SVG image resource, but this SVGImage can be
// referenced multiple times by containers of different sizes. Similarly, each
// use of an image can have a different fragment identifier as part of its URL
// (e.g., foo.svg#abc) which can influence rendering.
//
// For example, the following would create three SVGImageForContainers
// referencing a single SVGImage for 'foo.svg':
// <img src='foo.svg#a' width='20'>
// <img src='foo.svg#a' width='10'>
// <img src='foo.svg#b' width='10'>
//
// SVGImageForContainer stores this per-use information and delegates to the
// SVGImage for how to draw the image.
class SVGImageForContainer final : public Image {
USING_FAST_MALLOC(SVGImageForContainer);
public:
static scoped_refptr<SVGImageForContainer> Create(
SVGImage* image,
const FloatSize& target_size,
float zoom,
const KURL& url) {
FloatSize container_size_without_zoom(target_size);
container_size_without_zoom.Scale(1 / zoom);
return base::AdoptRef(new SVGImageForContainer(
image, container_size_without_zoom, zoom, url));
}
IntSize Size() const override;
bool UsesContainerSize() const override {
return image_->UsesContainerSize();
}
bool HasRelativeSize() const override { return image_->HasRelativeSize(); }
bool ApplyShader(PaintFlags&, const SkMatrix& local_matrix) override;
void Draw(PaintCanvas*,
const PaintFlags&,
const FloatRect&,
const FloatRect&,
RespectImageOrientationEnum,
ImageClampingMode,
ImageDecodingMode) override;
// FIXME: Implement this to be less conservative.
bool CurrentFrameKnownToBeOpaque() override { return false; }
PaintImage PaintImageForCurrentFrame() override;
protected:
void DrawPattern(GraphicsContext&,
const FloatRect&,
const FloatSize&,
const FloatPoint&,
SkBlendMode,
const FloatRect&,
const FloatSize& repeat_spacing) override;
private:
SVGImageForContainer(SVGImage* image,
const FloatSize& container_size,
float zoom,
const KURL& url)
: image_(image),
container_size_(container_size),
zoom_(zoom),
url_(url) {}
void DestroyDecodedData() override {}
SVGImage* image_;
const FloatSize container_size_;
const float zoom_;
const KURL url_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_SVG_GRAPHICS_SVG_IMAGE_FOR_CONTAINER_H_
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