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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_DRAW_LOOPER_BUILDER_H_ 32 #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_DRAW_LOOPER_BUILDER_H_ 33 34 #include <memory> 35 36 #include "base/macros.h" 37 #include "third_party/blink/renderer/platform/platform_export.h" 38 #include "third_party/blink/renderer/platform/wtf/allocator/allocator.h" 39 #include "third_party/skia/include/core/SkRefCnt.h" 40 #include "third_party/skia/include/effects/SkLayerDrawLooper.h" 41 42 class SkDrawLooper; 43 44 namespace blink { 45 46 class Color; 47 class FloatSize; 48 49 class PLATFORM_EXPORT DrawLooperBuilder final { 50 STACK_ALLOCATED(); 51 52 public: 53 enum ShadowTransformMode { 54 kShadowRespectsTransforms, 55 kShadowIgnoresTransforms 56 }; 57 enum ShadowAlphaMode { kShadowRespectsAlpha, kShadowIgnoresAlpha }; 58 59 DrawLooperBuilder(); 60 ~DrawLooperBuilder(); 61 62 // Creates the SkDrawLooper and passes ownership to the caller. The builder 63 // should not be used any more after calling this method. 64 sk_sp<SkDrawLooper> DetachDrawLooper(); 65 66 void AddUnmodifiedContent(); 67 void AddShadow(const FloatSize& offset, 68 float blur, 69 const Color&, 70 ShadowTransformMode = kShadowRespectsTransforms, 71 ShadowAlphaMode = kShadowRespectsAlpha); 72 73 private: 74 SkLayerDrawLooper::Builder sk_draw_looper_builder_; 75 76 // Implementing the copy constructor properly would require writing code to 77 // copy the underlying SkLayerDrawLooper::Builder. 78 DISALLOW_COPY_AND_ASSIGN(DrawLooperBuilder); 79 }; 80 81 } // namespace blink 82 83 #endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_DRAW_LOOPER_BUILDER_H_ 84