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/*
* Copyright (C) 2011 Igalia S.L.
*
* 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 PlatformContextCairo_h
#define PlatformContextCairo_h
#include "ContextShadow.h"
#include "RefPtrCairo.h"
namespace WebCore {
// In Cairo image masking is immediate, so to emulate image clipping we must save masking
// details as part of the context state and apply them during platform restore.
class ImageMaskInformation {
public:
void update(cairo_surface_t* maskSurface, const FloatRect& maskRect)
{
m_maskSurface = maskSurface;
m_maskRect = maskRect;
}
bool isValid() const { return m_maskSurface; }
cairo_surface_t* maskSurface() const { return m_maskSurface.get(); }
const FloatRect& maskRect() const { return m_maskRect; }
private:
RefPtr<cairo_surface_t> m_maskSurface;
FloatRect m_maskRect;
};
// Much like PlatformContextSkia in the Skia port, this class holds information that
// would normally be private to GraphicsContext, except that we want to allow access
// to it in Font and Image code. This allows us to separate the concerns of Cairo-specific
// code from the platform-independent GraphicsContext.
class PlatformContextCairo {
WTF_MAKE_NONCOPYABLE(PlatformContextCairo);
public:
PlatformContextCairo(cairo_t*);
cairo_t* cr() { return m_cr.get(); }
void setCr(cairo_t* cr) { m_cr = cr; }
void save();
void restore();
void pushImageMask(cairo_surface_t*, const FloatRect&);
private:
RefPtr<cairo_t> m_cr;
Vector<ImageMaskInformation> m_maskImageStack;
};
} // namespace WebCore
#endif // PlatformContextCairo_h
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