1 /* 2 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved. 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 GraphicsContextPlatformPrivateCG_h 27 #define GraphicsContextPlatformPrivateCG_h 28 29 #include <wtf/RetainPtr.h> 30 #include <CoreGraphics/CGContext.h> 31 32 namespace WebCore { 33 34 enum GraphicsContextCGFlag { 35 IsLayerCGContext = 1 << 0, 36 IsAcceleratedCGContext = 1 << 1 37 }; 38 39 typedef unsigned GraphicsContextCGFlags; 40 41 class GraphicsContextPlatformPrivate { 42 public: 43 GraphicsContextPlatformPrivate(CGContextRef cgContext, GraphicsContextCGFlags flags = 0) m_cgContext(cgContext)44 : m_cgContext(cgContext) 45 #if PLATFORM(WIN) 46 , m_hdc(0) 47 , m_shouldIncludeChildWindows(false) 48 #endif 49 #if PLATFORM(WIN) || !ASSERT_DISABLED 50 , m_transparencyCount(0) 51 #endif 52 , m_userToDeviceTransformKnownToBeIdentity(false) 53 , m_contextFlags(flags) 54 { 55 } 56 ~GraphicsContextPlatformPrivate()57 ~GraphicsContextPlatformPrivate() 58 { 59 ASSERT(!m_transparencyCount); 60 } 61 62 #if PLATFORM(MAC) || PLATFORM(CHROMIUM) 63 // These methods do nothing on Mac. save()64 void save() {} restore()65 void restore() {} flush()66 void flush() {} clip(const FloatRect &)67 void clip(const FloatRect&) {} clip(const Path &)68 void clip(const Path&) {} scale(const FloatSize &)69 void scale(const FloatSize&) {} rotate(float)70 void rotate(float) {} translate(float,float)71 void translate(float, float) {} concatCTM(const AffineTransform &)72 void concatCTM(const AffineTransform&) {} setCTM(const AffineTransform &)73 void setCTM(const AffineTransform&) {} 74 #endif 75 76 #if PLATFORM(WIN) 77 // On Windows, we need to update the HDC for form controls to draw in the right place. 78 void save(); 79 void restore(); 80 void flush(); 81 void clip(const FloatRect&); 82 void clip(const Path&); 83 void scale(const FloatSize&); 84 void rotate(float); 85 void translate(float, float); 86 void concatCTM(const AffineTransform&); 87 void setCTM(const AffineTransform&); 88 89 HDC m_hdc; 90 bool m_shouldIncludeChildWindows; 91 #endif 92 beginTransparencyLayer()93 void beginTransparencyLayer() 94 { 95 #if PLATFORM(WIN) || !ASSERT_DISABLED 96 m_transparencyCount++; 97 #endif 98 } endTransparencyLayer()99 void endTransparencyLayer() 100 { 101 #if PLATFORM(WIN) || !ASSERT_DISABLED 102 ASSERT(m_transparencyCount > 0); 103 m_transparencyCount--; 104 #endif 105 } 106 107 RetainPtr<CGContextRef> m_cgContext; 108 #if PLATFORM(WIN) || !ASSERT_DISABLED 109 int m_transparencyCount; 110 #endif 111 bool m_userToDeviceTransformKnownToBeIdentity; 112 GraphicsContextCGFlags m_contextFlags; 113 }; 114 115 } 116 117 #endif // GraphicsContextPlatformPrivateCG_h 118