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/*
* Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
* Copyright (C) 2007 Alp Toker <alp@atoker.com>
* Copyright (C) 2008 Brent Fulgham <bfulgham@gmail.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 GraphicsContextPlatformPrivateCairo_h
#define GraphicsContextPlatformPrivateCairo_h
#include "GraphicsContext.h"
#include "ContextShadow.h"
#include "PlatformContextCairo.h"
#include "RefPtrCairo.h"
#include <cairo.h>
#include <math.h>
#include <stdio.h>
#include <wtf/MathExtras.h>
#if PLATFORM(GTK)
#include <pango/pango.h>
typedef struct _GdkExposeEvent GdkExposeEvent;
#elif PLATFORM(WIN)
#include <cairo-win32.h>
#endif
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 it 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;
};
class GraphicsContextPlatformPrivate {
public:
GraphicsContextPlatformPrivate(PlatformContextCairo* newPlatformContext)
: platformContext(newPlatformContext)
#if PLATFORM(GTK)
, expose(0)
#elif PLATFORM(WIN)
// NOTE: These may note be needed: review and remove once Cairo implementation is complete
, m_hdc(0)
, m_transparencyCount(0)
, m_shouldIncludeChildWindows(false)
#endif
{
}
~GraphicsContextPlatformPrivate()
{
}
#if PLATFORM(WIN)
// On Windows, we need to update the HDC for form controls to draw in the right place.
void save();
void restore();
void flush();
void clip(const FloatRect&);
void clip(const Path&);
void scale(const FloatSize&);
void rotate(float);
void translate(float, float);
void concatCTM(const AffineTransform&);
void setCTM(const AffineTransform&);
void beginTransparencyLayer() { m_transparencyCount++; }
void endTransparencyLayer() { m_transparencyCount--; }
void syncContext(cairo_t* cr);
#else
// On everything else, we do nothing.
void save() {}
void restore() {}
void flush() {}
void clip(const FloatRect&) {}
void clip(const Path&) {}
void scale(const FloatSize&) {}
void rotate(float) {}
void translate(float, float) {}
void concatCTM(const AffineTransform&) {}
void setCTM(const AffineTransform&) {}
void beginTransparencyLayer() {}
void endTransparencyLayer() {}
void syncContext(cairo_t* cr) {}
#endif
PlatformContextCairo* platformContext;
Vector<float> layers;
ContextShadow shadow;
Vector<ContextShadow> shadowStack;
Vector<ImageMaskInformation> maskImageStack;
#if PLATFORM(GTK)
GdkEventExpose* expose;
#elif PLATFORM(WIN)
HDC m_hdc;
unsigned m_transparencyCount;
bool m_shouldIncludeChildWindows;
#endif
};
// This is a specialized private section for the Cairo GraphicsContext, which knows how
// to clean up the heap allocated PlatformContextCairo that we must use for the top-level
// GraphicsContext.
class GraphicsContextPlatformPrivateToplevel : public GraphicsContextPlatformPrivate {
public:
GraphicsContextPlatformPrivateToplevel(PlatformContextCairo* platformContext)
: GraphicsContextPlatformPrivate(platformContext)
{
}
~GraphicsContextPlatformPrivateToplevel()
{
delete platformContext;
}
};
} // namespace WebCore
#endif // GraphicsContextPlatformPrivateCairo_h
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