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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 #include "config.h" | |
| 32 #include "platform/graphics/DrawLooper.h" | |
| 33 | |
| 34 #include "platform/geometry/FloatSize.h" | |
| 35 #include "platform/graphics/Color.h" | |
| 36 #include "third_party/skia/include/core/SkColor.h" | |
| 37 #include "third_party/skia/include/core/SkColorFilter.h" | |
| 38 #include "third_party/skia/include/core/SkDrawLooper.h" | |
| 39 #include "third_party/skia/include/core/SkPaint.h" | |
| 40 #include "third_party/skia/include/core/SkXfermode.h" | |
| 41 #include "third_party/skia/include/effects/SkBlurMaskFilter.h" | |
| 42 #include "third_party/skia/include/effects/SkLayerDrawLooper.h" | |
| 43 | |
| 44 namespace WebCore { | |
| 45 | |
| 46 DrawLooper::DrawLooper() : m_skDrawLooper(adoptRef(new SkLayerDrawLooper)) { } | |
| 47 | |
| 48 DrawLooper::~DrawLooper() { } | |
| 49 | |
| 50 SkDrawLooper* DrawLooper::skDrawLooper() const | |
| 51 { | |
| 52 return m_skDrawLooper.get(); | |
| 53 } | |
| 54 | |
| 55 void DrawLooper::addUnmodifiedContent() | |
| 56 { | |
| 57 SkLayerDrawLooper::LayerInfo info; | |
| 58 m_skDrawLooper->addLayerOnTop(info); | |
| 59 } | |
| 60 | |
| 61 void DrawLooper::addShadow(const FloatSize& offset, float blur, const Color& col
or, | |
| 62 ShadowTransformMode shadowTransformMode, ShadowAlphaMode shadowAlphaMode) | |
| 63 { | |
| 64 // Detect when there's no effective shadow. | |
| 65 if (!color.alpha()) | |
| 66 return; | |
| 67 | |
| 68 SkColor skColor = color.rgb(); | |
| 69 | |
| 70 SkLayerDrawLooper::LayerInfo info; | |
| 71 | |
| 72 switch (shadowAlphaMode) { | |
| 73 case ShadowRespectsAlpha: | |
| 74 info.fColorMode = SkXfermode::kDst_Mode; | |
| 75 break; | |
| 76 case ShadowIgnoresAlpha: | |
| 77 info.fColorMode = SkXfermode::kSrc_Mode; | |
| 78 break; | |
| 79 default: | |
| 80 ASSERT_NOT_REACHED(); | |
| 81 } | |
| 82 | |
| 83 if (blur) | |
| 84 info.fPaintBits |= SkLayerDrawLooper::kMaskFilter_Bit; // our blur | |
| 85 info.fPaintBits |= SkLayerDrawLooper::kColorFilter_Bit; | |
| 86 info.fOffset.set(offset.width(), offset.height()); | |
| 87 info.fPostTranslate = (shadowTransformMode == ShadowIgnoresTransforms); | |
| 88 | |
| 89 SkPaint* paint = m_skDrawLooper->addLayerOnTop(info); | |
| 90 | |
| 91 if (blur) { | |
| 92 uint32_t mfFlags = SkBlurMaskFilter::kHighQuality_BlurFlag; | |
| 93 if (shadowTransformMode == ShadowIgnoresTransforms) | |
| 94 mfFlags |= SkBlurMaskFilter::kIgnoreTransform_BlurFlag; | |
| 95 RefPtr<SkMaskFilter> mf = adoptRef(SkBlurMaskFilter::Create( | |
| 96 (double)blur / 2.0, SkBlurMaskFilter::kNormal_BlurStyle, mfFlags)); | |
| 97 paint->setMaskFilter(mf.get()); | |
| 98 } | |
| 99 | |
| 100 RefPtr<SkColorFilter> cf = adoptRef(SkColorFilter::CreateModeFilter(skColor,
SkXfermode::kSrcIn_Mode)); | |
| 101 paint->setColorFilter(cf.get()); | |
| 102 } | |
| 103 | |
| 104 } // namespace WebCore | |
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Chromium Code Reviews
Issue 177473003:
Use SkLayerDrawLooper::Builder to construct SkLayerDrawLooper. (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master