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_CORE_STYLE_SHADOW_LIST_H_ 32 #define THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_SHADOW_LIST_H_ 33 34 #include <memory> 35 #include "third_party/blink/renderer/core/style/shadow_data.h" 36 #include "third_party/blink/renderer/platform/geometry/float_rect_outsets.h" 37 #include "third_party/blink/renderer/platform/graphics/draw_looper_builder.h" 38 #include "third_party/blink/renderer/platform/wtf/allocator/allocator.h" 39 #include "third_party/blink/renderer/platform/wtf/ref_counted.h" 40 #include "third_party/blink/renderer/platform/wtf/vector.h" 41 42 namespace blink { 43 44 class FloatRect; 45 46 typedef Vector<ShadowData, 1> ShadowDataVector; 47 48 // These are used to store shadows in specified order, but we usually want to 49 // iterate over them backwards as the first-specified shadow is painted on top. 50 class ShadowList : public RefCounted<ShadowList> { 51 USING_FAST_MALLOC(ShadowList); 52 53 public: 54 // This consumes passed in vector. Adopt(ShadowDataVector & shadows)55 static scoped_refptr<ShadowList> Adopt(ShadowDataVector& shadows) { 56 return base::AdoptRef(new ShadowList(shadows)); 57 } Shadows()58 const ShadowDataVector& Shadows() const { return shadows_; } 59 bool operator==(const ShadowList& o) const { return shadows_ == o.shadows_; } 60 bool operator!=(const ShadowList& o) const { return !(*this == o); } 61 62 // Outsets needed to include all shadows in this list, as well as the 63 // source (i.e. no outsets will be negative). 64 FloatRectOutsets RectOutsetsIncludingOriginal() const; 65 66 void AdjustRectForShadow(FloatRect&) const; 67 68 sk_sp<SkDrawLooper> CreateDrawLooper(DrawLooperBuilder::ShadowAlphaMode, 69 const Color& current_color, 70 mojom::blink::ColorScheme color_scheme, 71 bool is_horizontal = true) const; 72 73 private: ShadowList(ShadowDataVector & shadows)74 ShadowList(ShadowDataVector& shadows) { 75 // If we have no shadows, we use a null ShadowList 76 DCHECK(!shadows.IsEmpty()); 77 shadows_.swap(shadows); 78 shadows_.ShrinkToFit(); 79 } 80 ShadowDataVector shadows_; 81 }; 82 83 } // namespace blink 84 85 #endif // THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_SHADOW_LIST_H_ 86