89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_SVGCONTEXT_H_
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#define MOZILLA_SVGCONTEXT_H_
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#include "mozilla/Maybe.h"
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#include "SVGPreserveAspectRatio.h"
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#include "Units.h"
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namespace mozilla {
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// SVG image-specific rendering context. For imgIContainer::Draw.
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// Used to pass information such as
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// - viewport information from CSS, and
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// - overridden attributes from an SVG <image> element
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// to the image's internal SVG document when it's drawn.
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class SVGImageContext
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{
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public:
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SVGImageContext()
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: mGlobalOpacity(1.0)
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{ }
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// Note: 'aIsPaintingSVGImageElement' should be used to indicate whether
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// the SVG image in question is being painted for an SVG <image> element.
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SVGImageContext(CSSIntSize aViewportSize,
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Maybe<SVGPreserveAspectRatio> aPreserveAspectRatio,
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gfxFloat aOpacity = 1.0,
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bool aIsPaintingSVGImageElement = false)
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: mViewportSize(aViewportSize)
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, mPreserveAspectRatio(aPreserveAspectRatio)
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, mGlobalOpacity(aOpacity)
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, mIsPaintingSVGImageElement(aIsPaintingSVGImageElement)
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{ }
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const CSSIntSize& GetViewportSize() const {
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return mViewportSize;
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}
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const Maybe<SVGPreserveAspectRatio>& GetPreserveAspectRatio() const {
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return mPreserveAspectRatio;
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}
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gfxFloat GetGlobalOpacity() const {
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return mGlobalOpacity;
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}
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bool IsPaintingForSVGImageElement() const {
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return mIsPaintingSVGImageElement;
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}
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bool operator==(const SVGImageContext& aOther) const {
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return mViewportSize == aOther.mViewportSize &&
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mPreserveAspectRatio == aOther.mPreserveAspectRatio &&
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mGlobalOpacity == aOther.mGlobalOpacity &&
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mIsPaintingSVGImageElement == aOther.mIsPaintingSVGImageElement;
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}
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bool operator!=(const SVGImageContext& aOther) const {
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return !(*this == aOther);
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}
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uint32_t Hash() const {
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return HashGeneric(mViewportSize.width,
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mViewportSize.height,
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mPreserveAspectRatio.map(HashPAR).valueOr(0),
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HashBytes(&mGlobalOpacity, sizeof(gfxFloat)),
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mIsPaintingSVGImageElement);
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}
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private:
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static uint32_t HashPAR(const SVGPreserveAspectRatio& aPAR) {
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return aPAR.Hash();
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}
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// NOTE: When adding new member-vars, remember to update Hash() & operator==.
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CSSIntSize mViewportSize;
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Maybe<SVGPreserveAspectRatio> mPreserveAspectRatio;
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gfxFloat mGlobalOpacity;
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bool mIsPaintingSVGImageElement;
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};
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} // namespace mozilla
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#endif // MOZILLA_SVGCONTEXT_H_
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