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