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1 /* | 1 /* |
2 * Copyright (C) 2013 Google Inc. All rights reserved. | 2 * Copyright (C) 2013 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 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. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 */ | 29 */ |
30 | 30 |
31 #include "config.h" | 31 #include "config.h" |
32 #include "platform/graphics/DrawLooperBuilder.h" | 32 #include "platform/graphics/DrawLooperBuilder.h" |
33 | 33 |
34 #include "platform/geometry/FloatSize.h" | 34 #include "platform/geometry/FloatSize.h" |
35 #include "platform/graphics/Color.h" | 35 #include "platform/graphics/Color.h" |
| 36 #include "platform/graphics/skia/SkiaUtils.h" |
36 #include "third_party/skia/include/core/SkColor.h" | 37 #include "third_party/skia/include/core/SkColor.h" |
37 #include "third_party/skia/include/core/SkColorFilter.h" | 38 #include "third_party/skia/include/core/SkColorFilter.h" |
38 #include "third_party/skia/include/core/SkDrawLooper.h" | 39 #include "third_party/skia/include/core/SkDrawLooper.h" |
39 #include "third_party/skia/include/core/SkPaint.h" | 40 #include "third_party/skia/include/core/SkPaint.h" |
40 #include "third_party/skia/include/core/SkXfermode.h" | 41 #include "third_party/skia/include/core/SkXfermode.h" |
41 #include "third_party/skia/include/effects/SkBlurMaskFilter.h" | 42 #include "third_party/skia/include/effects/SkBlurMaskFilter.h" |
42 #include "wtf/RefPtr.h" | 43 #include "wtf/RefPtr.h" |
43 | 44 |
44 namespace blink { | 45 namespace blink { |
45 | 46 |
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56 { | 57 { |
57 return adoptRef(m_skDrawLooperBuilder.detachLooper()); | 58 return adoptRef(m_skDrawLooperBuilder.detachLooper()); |
58 } | 59 } |
59 | 60 |
60 void DrawLooperBuilder::addUnmodifiedContent() | 61 void DrawLooperBuilder::addUnmodifiedContent() |
61 { | 62 { |
62 SkLayerDrawLooper::LayerInfo info; | 63 SkLayerDrawLooper::LayerInfo info; |
63 m_skDrawLooperBuilder.addLayerOnTop(info); | 64 m_skDrawLooperBuilder.addLayerOnTop(info); |
64 } | 65 } |
65 | 66 |
66 // This replicates the old skia behavior when it used to take radius for blur. N
ow it takes sigma. | |
67 static SkScalar RadiusToSigma(SkScalar radius) | |
68 { | |
69 SkASSERT(radius > 0); | |
70 return 0.57735f * radius + 0.5f; | |
71 } | |
72 | |
73 void DrawLooperBuilder::addShadow(const FloatSize& offset, float blur, const Col
or& color, | 67 void DrawLooperBuilder::addShadow(const FloatSize& offset, float blur, const Col
or& color, |
74 ShadowTransformMode shadowTransformMode, ShadowAlphaMode shadowAlphaMode) | 68 ShadowTransformMode shadowTransformMode, ShadowAlphaMode shadowAlphaMode) |
75 { | 69 { |
76 // Detect when there's no effective shadow. | 70 // Detect when there's no effective shadow. |
77 if (!color.alpha()) | 71 if (!color.alpha()) |
78 return; | 72 return; |
79 | 73 |
80 SkColor skColor = color.rgb(); | 74 SkColor skColor = color.rgb(); |
81 | 75 |
82 SkLayerDrawLooper::LayerInfo info; | 76 SkLayerDrawLooper::LayerInfo info; |
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94 | 88 |
95 if (blur) | 89 if (blur) |
96 info.fPaintBits |= SkLayerDrawLooper::kMaskFilter_Bit; // our blur | 90 info.fPaintBits |= SkLayerDrawLooper::kMaskFilter_Bit; // our blur |
97 info.fPaintBits |= SkLayerDrawLooper::kColorFilter_Bit; | 91 info.fPaintBits |= SkLayerDrawLooper::kColorFilter_Bit; |
98 info.fOffset.set(offset.width(), offset.height()); | 92 info.fOffset.set(offset.width(), offset.height()); |
99 info.fPostTranslate = (shadowTransformMode == ShadowIgnoresTransforms); | 93 info.fPostTranslate = (shadowTransformMode == ShadowIgnoresTransforms); |
100 | 94 |
101 SkPaint* paint = m_skDrawLooperBuilder.addLayerOnTop(info); | 95 SkPaint* paint = m_skDrawLooperBuilder.addLayerOnTop(info); |
102 | 96 |
103 if (blur) { | 97 if (blur) { |
104 const SkScalar sigma = RadiusToSigma(blur / 2); | 98 const SkScalar sigma = skBlurRadiusToSigma(blur); |
105 uint32_t mfFlags = SkBlurMaskFilter::kHighQuality_BlurFlag; | 99 uint32_t mfFlags = SkBlurMaskFilter::kHighQuality_BlurFlag; |
106 if (shadowTransformMode == ShadowIgnoresTransforms) | 100 if (shadowTransformMode == ShadowIgnoresTransforms) |
107 mfFlags |= SkBlurMaskFilter::kIgnoreTransform_BlurFlag; | 101 mfFlags |= SkBlurMaskFilter::kIgnoreTransform_BlurFlag; |
108 RefPtr<SkMaskFilter> mf = adoptRef(SkBlurMaskFilter::Create(kNormal_SkBl
urStyle, sigma, mfFlags)); | 102 RefPtr<SkMaskFilter> mf = adoptRef(SkBlurMaskFilter::Create(kNormal_SkBl
urStyle, sigma, mfFlags)); |
109 paint->setMaskFilter(mf.get()); | 103 paint->setMaskFilter(mf.get()); |
110 } | 104 } |
111 | 105 |
112 RefPtr<SkColorFilter> cf = adoptRef(SkColorFilter::CreateModeFilter(skColor,
SkXfermode::kSrcIn_Mode)); | 106 RefPtr<SkColorFilter> cf = adoptRef(SkColorFilter::CreateModeFilter(skColor,
SkXfermode::kSrcIn_Mode)); |
113 paint->setColorFilter(cf.get()); | 107 paint->setColorFilter(cf.get()); |
114 } | 108 } |
115 | 109 |
116 } // namespace blink | 110 } // namespace blink |
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