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/*
* Copyright (C) 2006, 2007, 2008 Apple Computer, Inc. All rights reserved.
* Copyright (C) 2007 Alp Toker <alp@atoker.com>
*
* 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 THIRD_PARTY_BLINK_RENDERER_CORE_HTML_CANVAS_CANVAS_IMAGE_SOURCE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_CANVAS_CANVAS_IMAGE_SOURCE_H_
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/geometry/float_size.h"
#include "third_party/blink/renderer/platform/graphics/graphics_types.h"
#include "third_party/blink/renderer/platform/weborigin/kurl.h"
namespace blink {
class FloatRect;
class Image;
enum SourceImageStatus {
kNormalSourceImageStatus,
kUndecodableSourceImageStatus, // Image element with a 'broken' image
kZeroSizeCanvasSourceImageStatus, // Source is a canvas with width or heigh
// of zero
kIncompleteSourceImageStatus, // Image element with no source media
kInvalidSourceImageStatus,
};
class CORE_EXPORT CanvasImageSource {
public:
virtual scoped_refptr<Image> GetSourceImageForCanvas(SourceImageStatus*,
AccelerationHint,
const FloatSize&) = 0;
// IMPORTANT: Result must be independent of whether destinationContext is
// already tainted because this function may be used to determine whether
// a CanvasPattern is "origin clean", and that pattern may be used on
// another canvas, which may not be already tainted.
virtual bool WouldTaintOrigin() const = 0;
virtual bool IsCSSImageValue() const { return false; }
virtual bool IsImageElement() const { return false; }
virtual bool IsVideoElement() const { return false; }
virtual bool IsCanvasElement() const { return false; }
virtual bool IsSVGSource() const { return false; }
virtual bool IsImageBitmap() const { return false; }
virtual bool IsOffscreenCanvas() const { return false; }
// Adjusts the source and destination rectangles for cases where the actual
// source image is a subregion of the image returned by
// getSourceImageForCanvas.
virtual void AdjustDrawRects(FloatRect* src_rect, FloatRect* dst_rect) const {
}
virtual FloatSize ElementSize(const FloatSize& default_object_size) const = 0;
virtual FloatSize DefaultDestinationSize(
const FloatSize& default_object_size) const {
return ElementSize(default_object_size);
}
virtual const KURL& SourceURL() const { return BlankURL(); }
virtual bool IsOpaque() const { return false; }
virtual bool IsAccelerated() const = 0;
protected:
virtual ~CanvasImageSource() = default;
};
} // namespace blink
#endif