1 /* 2 * Copyright (C) 2011 Google 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 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef PlatformCanvas_h 27 #define PlatformCanvas_h 28 29 #include "IntSize.h" 30 #include <stdint.h> 31 #include <wtf/Noncopyable.h> 32 #include <wtf/OwnPtr.h> 33 34 #if USE(CG) 35 #include <CoreGraphics/CGColorSpace.h> 36 #include <CoreGraphics/CGContext.h> 37 #include <wtf/OwnArrayPtr.h> 38 #include <wtf/RetainPtr.h> 39 #endif 40 41 #if USE(SKIA) 42 class SkBitmap; 43 class SkCanvas; 44 #endif 45 46 namespace WebCore { 47 48 class GraphicsContext; 49 50 #if USE(SKIA) 51 class PlatformContextSkia; 52 #endif 53 54 // A 2D buffer of pixels with an associated GraphicsContext. 55 class PlatformCanvas { 56 WTF_MAKE_NONCOPYABLE(PlatformCanvas); 57 public: 58 PlatformCanvas(); 59 ~PlatformCanvas(); 60 61 // Scoped lock class to get temporary access to this canvas's pixels. 62 class AutoLocker { 63 WTF_MAKE_NONCOPYABLE(AutoLocker); 64 public: 65 explicit AutoLocker(PlatformCanvas*); 66 ~AutoLocker(); 67 pixels()68 const uint8_t* pixels() const { return m_pixels; } 69 private: 70 PlatformCanvas* m_canvas; 71 #if USE(SKIA) 72 const SkBitmap* m_bitmap; 73 #endif 74 uint8_t* m_pixels; 75 }; 76 77 // Scoped lock class to get temporary access to paint into this canvas. 78 class Painter { 79 WTF_MAKE_NONCOPYABLE(Painter); 80 public: 81 enum TextOption { GrayscaleText, SubpixelText }; 82 83 Painter(PlatformCanvas*, TextOption); 84 ~Painter(); 85 context()86 GraphicsContext* context() const { return m_context.get(); } 87 private: 88 OwnPtr<GraphicsContext> m_context; 89 #if USE(SKIA) 90 OwnPtr<PlatformContextSkia> m_skiaContext; 91 #elif USE(CG) 92 RetainPtr<CGColorSpaceRef> m_colorSpace; 93 RetainPtr<CGContextRef> m_contextCG; 94 #endif 95 }; 96 97 void resize(const IntSize&); size()98 IntSize size() const { return m_size; } 99 100 private: 101 #if USE(SKIA) 102 OwnPtr<SkCanvas> m_skiaCanvas; 103 #elif USE(CG) 104 OwnArrayPtr<uint8_t> m_pixelData; 105 #endif 106 IntSize m_size; 107 }; 108 109 } // namespace WebCore 110 111 #endif 112