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 DrawLooperBuilder_h 32 #define DrawLooperBuilder_h 33 34 #include "platform/PlatformExport.h" 35 #include "third_party/skia/include/effects/SkLayerDrawLooper.h" 36 #include "wtf/Noncopyable.h" 37 #include "wtf/PassOwnPtr.h" 38 #include "wtf/PassRefPtr.h" 39 40 class SkDrawLooper; 41 42 namespace WebCore { 43 44 class Color; 45 class FloatSize; 46 47 class PLATFORM_EXPORT DrawLooperBuilder FINAL { 48 // Implementing the copy constructor properly would require writing code to 49 // copy the underlying SkLayerDrawLooper::Builder. 50 WTF_MAKE_NONCOPYABLE(DrawLooperBuilder); 51 52 public: 53 enum ShadowTransformMode { 54 ShadowRespectsTransforms, 55 ShadowIgnoresTransforms 56 }; 57 enum ShadowAlphaMode { 58 ShadowRespectsAlpha, 59 ShadowIgnoresAlpha 60 }; 61 62 DrawLooperBuilder(); 63 ~DrawLooperBuilder(); 64 65 static PassOwnPtr<DrawLooperBuilder> create(); 66 67 // Creates the SkDrawLooper and passes ownership to the caller. The builder 68 // should not be used any more after calling this method. 69 PassRefPtr<SkDrawLooper> detachDrawLooper(); 70 71 void addUnmodifiedContent(); 72 void addShadow(const FloatSize& offset, float blur, const Color&, 73 ShadowTransformMode = ShadowRespectsTransforms, 74 ShadowAlphaMode = ShadowRespectsAlpha); 75 76 private: 77 SkLayerDrawLooper::Builder m_skDrawLooperBuilder; 78 }; 79 80 } // namespace WebCore 81 82 #endif // DrawLooperBuilder_h 83