/* * 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 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. */ #ifndef PlatformContextCairo_h #define PlatformContextCairo_h #if USE(CAIRO) #include "GraphicsContext.h" #include "RefPtrCairo.h" #include "ShadowBlur.h" namespace WebCore { struct GraphicsContextState; // 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*); ~PlatformContextCairo(); cairo_t* cr() { return m_cr.get(); } void setCr(cairo_t* cr) { m_cr = cr; } ShadowBlur& shadowBlur() { return m_shadowBlur; } void save(); void restore(); void setGlobalAlpha(float); float globalAlpha() const; void pushImageMask(cairo_surface_t*, const FloatRect&); void drawSurfaceToContext(cairo_surface_t*, const FloatRect& destRect, const FloatRect& srcRect, GraphicsContext&); void setImageInterpolationQuality(InterpolationQuality); InterpolationQuality imageInterpolationQuality() const; enum PatternAdjustment { NoAdjustment, AdjustPatternForGlobalAlpha }; void prepareForFilling(const GraphicsContextState&, PatternAdjustment); enum AlphaPreservation { DoNotPreserveAlpha, PreserveAlpha }; void prepareForStroking(const GraphicsContextState&, AlphaPreservation = PreserveAlpha); private: void clipForPatternFilling(const GraphicsContextState&); RefPtr<cairo_t> m_cr; class State; State* m_state; WTF::Vector<State> m_stateStack; // GraphicsContext is responsible for managing the state of the ShadowBlur, // so it does not need to be on the state stack. ShadowBlur m_shadowBlur; }; } // namespace WebCore #endif // USE(CAIRO) #endif // PlatformContextCairo_h