1 /* 2 * Copyright (C) 2011 Igalia S.L. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef PlatformContextCairo_h 27 #define PlatformContextCairo_h 28 29 #include "ContextShadow.h" 30 #include "RefPtrCairo.h" 31 32 namespace WebCore { 33 34 // In Cairo image masking is immediate, so to emulate image clipping we must save masking 35 // details as part of the context state and apply them during platform restore. 36 class ImageMaskInformation { 37 public: update(cairo_surface_t * maskSurface,const FloatRect & maskRect)38 void update(cairo_surface_t* maskSurface, const FloatRect& maskRect) 39 { 40 m_maskSurface = maskSurface; 41 m_maskRect = maskRect; 42 } 43 isValid()44 bool isValid() const { return m_maskSurface; } maskSurface()45 cairo_surface_t* maskSurface() const { return m_maskSurface.get(); } maskRect()46 const FloatRect& maskRect() const { return m_maskRect; } 47 48 private: 49 RefPtr<cairo_surface_t> m_maskSurface; 50 FloatRect m_maskRect; 51 }; 52 53 // Much like PlatformContextSkia in the Skia port, this class holds information that 54 // would normally be private to GraphicsContext, except that we want to allow access 55 // to it in Font and Image code. This allows us to separate the concerns of Cairo-specific 56 // code from the platform-independent GraphicsContext. 57 58 class PlatformContextCairo { 59 WTF_MAKE_NONCOPYABLE(PlatformContextCairo); 60 public: 61 PlatformContextCairo(cairo_t*); 62 cr()63 cairo_t* cr() { return m_cr.get(); } setCr(cairo_t * cr)64 void setCr(cairo_t* cr) { m_cr = cr; } 65 66 void save(); 67 void restore(); 68 void pushImageMask(cairo_surface_t*, const FloatRect&); 69 70 private: 71 RefPtr<cairo_t> m_cr; 72 Vector<ImageMaskInformation> m_maskImageStack; 73 }; 74 75 } // namespace WebCore 76 77 #endif // PlatformContextCairo_h 78