1 /* 2 * Copyright (C) 2013 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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef DrawLooper_h 32 #define DrawLooper_h 33 34 #include "wtf/Noncopyable.h" 35 #include "wtf/RefPtr.h" 36 37 class SkDrawLooper; 38 class SkLayerDrawLooper; 39 40 namespace WebCore { 41 42 class Color; 43 class FloatSize; 44 45 class DrawLooper { 46 // Implementing the copy constructor properly would require writing code to 47 // copy the underlying SkDrawLooper. 48 WTF_MAKE_NONCOPYABLE(DrawLooper); 49 50 public: 51 enum ShadowTransformMode { 52 ShadowRespectsTransforms, 53 ShadowIgnoresTransforms 54 }; 55 enum ShadowAlphaMode { 56 ShadowRespectsAlpha, 57 ShadowIgnoresAlpha 58 }; 59 60 DrawLooper(); 61 ~DrawLooper(); 62 63 // Callees should not modify this looper other than to iterate over it. 64 // A downcast to SkLayerDrawLooper* is tantamount to a const_cast. 65 SkDrawLooper* skDrawLooper() const; 66 67 void addUnmodifiedContent(); 68 void addShadow(const FloatSize& offset, float blur, const Color&, 69 ShadowTransformMode = ShadowRespectsTransforms, 70 ShadowAlphaMode = ShadowRespectsAlpha); 71 72 private: 73 RefPtr<SkLayerDrawLooper> m_skDrawLooper; 74 }; 75 76 } // namespace WebCore 77 78 #endif // DrawLooper_h 79