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| 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 | |
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