Source/WebCore/platform/graphics/GeneratedImage.h

/*
 * Copyright (C) 2008, 2013 Apple 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. 
 */

#pragma once

#include "FloatSize.h"
#include "Image.h"

namespace WebCore {

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

    void setContainerSize(const FloatSize& size) override { m_size = size; }
    bool usesContainerSize() const override { return true; }
    bool hasRelativeWidth() const override { return true; }
    bool hasRelativeHeight() const override { return true; }
    void computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) override;

    FloatSize size() const override { return m_size; }

    // Assume that generated content has no decoded data we need to worry about
    void destroyDecodedData(bool /*destroyAll*/ = true) override { }

protected:
    ImageDrawResult draw(GraphicsContext&, const FloatRect& dstRect, const FloatRect& srcRect, CompositeOperator, BlendMode, DecodingMode, ImageOrientationDescription) override = 0;
    void drawPattern(GraphicsContext&, const FloatRect& destRect, const FloatRect& srcRect, const AffineTransform& patternTransform,
        const FloatPoint& phase, const FloatSize& spacing, CompositeOperator, BlendMode) override = 0;

    // FIXME: Implement this to be less conservative.
    bool currentFrameKnownToBeOpaque() const override { return false; }

    GeneratedImage() { }

private:
    bool isGeneratedImage() const override { return true; }

    FloatSize m_size;
};

}

SPECIALIZE_TYPE_TRAITS_IMAGE(GeneratedImage)