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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 |
(...skipping 15 matching lines...) Expand all Loading... |
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 "core/platform/graphics/DrawLooper.h" | 32 #include "core/platform/graphics/DrawLooper.h" |
33 | 33 |
34 #include "core/platform/graphics/Color.h" | 34 #include "core/platform/graphics/Color.h" |
35 #include "core/platform/graphics/FloatSize.h" | 35 #include "core/platform/graphics/FloatSize.h" |
| 36 #include "third_party/skia/include/core/SkBitmap.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" |
| 43 #include "third_party/skia/include/effects/SkDropShadowImageFilter.h" |
42 #include "third_party/skia/include/effects/SkLayerDrawLooper.h" | 44 #include "third_party/skia/include/effects/SkLayerDrawLooper.h" |
43 | 45 |
44 namespace WebCore { | 46 namespace WebCore { |
45 | 47 |
46 DrawLooper::DrawLooper() : m_skDrawLooper(adoptRef(new SkLayerDrawLooper)) { } | 48 DrawLooper::DrawLooper() { } |
47 | 49 |
48 DrawLooper::~DrawLooper() { } | 50 DrawLooper::~DrawLooper() { } |
49 | 51 |
50 SkDrawLooper* DrawLooper::skDrawLooper() const | 52 SkDrawLooper* DrawLooper::skDrawLooper() const |
51 { | 53 { |
52 return m_skDrawLooper.get(); | 54 if (!m_cachedDrawLooper) |
| 55 buildCachedDrawLooper(); |
| 56 return m_cachedDrawLooper.get(); |
| 57 } |
| 58 |
| 59 SkImageFilter* DrawLooper::imageFilter() const |
| 60 { |
| 61 if (!m_cachedImageFilter) |
| 62 buildCachedImageFilter(); |
| 63 return m_cachedImageFilter.get(); |
| 64 } |
| 65 |
| 66 void DrawLooper::clearCached() |
| 67 { |
| 68 m_cachedDrawLooper.clear(); |
| 69 m_cachedImageFilter.clear(); |
53 } | 70 } |
54 | 71 |
55 void DrawLooper::addUnmodifiedContent() | 72 void DrawLooper::addUnmodifiedContent() |
56 { | 73 { |
57 SkLayerDrawLooper::LayerInfo info; | 74 DrawLooperLayerInfo info; |
58 m_skDrawLooper->addLayerOnTop(info); | 75 info.m_layerType = UnmodifiedLayer; |
| 76 m_layerInfo.append(info); |
| 77 clearCached(); |
59 } | 78 } |
60 | 79 |
61 void DrawLooper::addShadow(const FloatSize& offset, float blur, const Color& col
or, | 80 void DrawLooper::addShadow(const FloatSize& offset, float blur, const Color& col
or, |
62 ShadowTransformMode shadowTransformMode, ShadowAlphaMode shadowAlphaMode) | 81 ShadowTransformMode shadowTransformMode, ShadowAlphaMode shadowAlphaMode) |
63 { | 82 { |
64 // Detect when there's no effective shadow. | 83 // Detect when there's no effective shadow. |
65 if (!color.alpha()) | 84 if (!color.alpha()) |
66 return; | 85 return; |
| 86 DrawLooperLayerInfo info; |
| 87 info.m_layerType = ShadowLayer; |
| 88 info.m_blur = blur; |
| 89 info.m_color = color; |
| 90 info.m_offset = offset; |
| 91 info.m_shadowAlphaMode = shadowAlphaMode; |
| 92 info.m_shadowTransformMode = shadowTransformMode; |
| 93 m_layerInfo.append(info); |
| 94 clearCached(); |
| 95 }; |
67 | 96 |
68 SkColor skColor = color.rgb(); | 97 void DrawLooper::buildCachedDrawLooper() const |
| 98 { |
| 99 m_cachedDrawLooper = adoptRef(new SkLayerDrawLooper); |
| 100 LayerVector::const_iterator info; |
| 101 for (info = m_layerInfo.begin(); info < m_layerInfo.end(); ++info) { |
| 102 if (info->m_layerType == ShadowLayer) { |
| 103 SkColor skColor = info->m_color.rgb(); |
69 | 104 |
70 SkLayerDrawLooper::LayerInfo info; | 105 SkLayerDrawLooper::LayerInfo skInfo; |
71 | 106 |
72 switch (shadowAlphaMode) { | 107 switch (info->m_shadowAlphaMode) { |
73 case ShadowRespectsAlpha: | 108 case ShadowRespectsAlpha: |
74 info.fColorMode = SkXfermode::kDst_Mode; | 109 skInfo.fColorMode = SkXfermode::kDst_Mode; |
75 break; | 110 break; |
76 case ShadowIgnoresAlpha: | 111 case ShadowIgnoresAlpha: |
77 info.fColorMode = SkXfermode::kSrc_Mode; | 112 skInfo.fColorMode = SkXfermode::kSrc_Mode; |
78 break; | 113 break; |
79 default: | 114 default: |
80 ASSERT_NOT_REACHED(); | 115 ASSERT_NOT_REACHED(); |
| 116 } |
| 117 |
| 118 if (info->m_blur) |
| 119 skInfo.fPaintBits |= SkLayerDrawLooper::kMaskFilter_Bit; // our
blur |
| 120 skInfo.fPaintBits |= SkLayerDrawLooper::kColorFilter_Bit; |
| 121 skInfo.fOffset.set(info->m_offset.width(), info->m_offset.height()); |
| 122 skInfo.fPostTranslate = (info->m_shadowTransformMode == ShadowIgnore
sTransforms); |
| 123 |
| 124 SkPaint* paint = m_cachedDrawLooper->addLayerOnTop(skInfo); |
| 125 |
| 126 if (info->m_blur) { |
| 127 uint32_t mfFlags = SkBlurMaskFilter::kHighQuality_BlurFlag; |
| 128 if (info->m_shadowTransformMode == ShadowIgnoresTransforms) |
| 129 mfFlags |= SkBlurMaskFilter::kIgnoreTransform_BlurFlag; |
| 130 RefPtr<SkMaskFilter> mf = adoptRef(SkBlurMaskFilter::Create( |
| 131 (double)info->m_blur / 2.0, SkBlurMaskFilter::kNormal_BlurSt
yle, mfFlags)); |
| 132 paint->setMaskFilter(mf.get()); |
| 133 } |
| 134 |
| 135 RefPtr<SkColorFilter> cf = adoptRef(SkColorFilter::CreateModeFilter(
skColor, SkXfermode::kSrcIn_Mode)); |
| 136 paint->setColorFilter(cf.get()); |
| 137 } else { |
| 138 // Unmodified layer |
| 139 SkLayerDrawLooper::LayerInfo skInfo; |
| 140 m_cachedDrawLooper->addLayerOnTop(skInfo); |
| 141 } |
81 } | 142 } |
| 143 } |
82 | 144 |
83 if (blur) | 145 void DrawLooper::buildCachedImageFilter() const |
84 info.fPaintBits |= SkLayerDrawLooper::kMaskFilter_Bit; // our blur | 146 { |
85 info.fPaintBits |= SkLayerDrawLooper::kColorFilter_Bit; | 147 ASSERT(m_layerInfo.size() == 2); |
86 info.fOffset.set(offset.width(), offset.height()); | 148 ASSERT(m_layerInfo[0].m_layerType == ShadowLayer); |
87 info.fPostTranslate = (shadowTransformMode == ShadowIgnoresTransforms); | 149 ASSERT(m_layerInfo[1].m_layerType == UnmodifiedLayer); |
| 150 ASSERT(m_layerInfo[0].m_shadowAlphaMode == ShadowRespectsAlpha); |
| 151 ASSERT(m_layerInfo[0].m_shadowTransformMode == ShadowIgnoresTransforms); |
| 152 const float blurToSigmaFactor = 0.25; |
| 153 SkColor skColor = m_layerInfo[0].m_color.rgb(); |
| 154 m_cachedImageFilter = adoptRef(new SkDropShadowImageFilter(m_layerInfo[0].m_
offset.width(), m_layerInfo[0].m_offset.height(), m_layerInfo[0].m_blur * blurTo
SigmaFactor, skColor)); |
| 155 } |
88 | 156 |
89 SkPaint* paint = m_skDrawLooper->addLayerOnTop(info); | 157 bool DrawLooper::shouldUseImageFilterToDrawBitmap(const SkBitmap& bitmap) const |
| 158 { |
| 159 if (bitmap.isOpaque() || !m_layerInfo.size()) |
| 160 return false; |
90 | 161 |
91 if (blur) { | 162 #if !ASSERT_DISABLED |
92 uint32_t mfFlags = SkBlurMaskFilter::kHighQuality_BlurFlag; | 163 // Verify that cases that require a mask filter to render correctly are of |
93 if (shadowTransformMode == ShadowIgnoresTransforms) | 164 // a form that can be handled by DropShadowImageFilter. |
94 mfFlags |= SkBlurMaskFilter::kIgnoreTransform_BlurFlag; | 165 LayerVector::const_iterator info; |
95 RefPtr<SkMaskFilter> mf = adoptRef(SkBlurMaskFilter::Create( | 166 int unmodifiedCount = 0; |
96 (double)blur / 2.0, SkBlurMaskFilter::kNormal_BlurStyle, mfFlags)); | 167 int shadowCount = 0; |
97 paint->setMaskFilter(mf.get()); | 168 bool needsFilter = false; |
| 169 for (info = m_layerInfo.begin(); info < m_layerInfo.end(); ++info) { |
| 170 if (info->m_layerType == ShadowLayer) { |
| 171 needsFilter = needsFilter || (info->m_blur && info->m_shadowAlphaMod
e == ShadowRespectsAlpha); |
| 172 shadowCount++; |
| 173 } else { |
| 174 unmodifiedCount++; |
| 175 } |
| 176 |
98 } | 177 } |
| 178 if (needsFilter) { |
| 179 // If any of the following assertions ever fire, it means that we are hi
tting |
| 180 // case that may not be rendered correclty by the DrawLooper and cannot
be |
| 181 // handled by DropShadowImageFilter. |
| 182 ASSERT(shadowCount == 1); |
| 183 ASSERT(unmodifiedCount == 1); |
| 184 ASSERT(m_layerInfo[0].m_layerType == ShadowLayer); |
| 185 ASSERT(m_layerInfo[0].m_shadowTransformMode == ShadowIgnoresTransforms); |
| 186 } |
| 187 #endif |
99 | 188 |
100 RefPtr<SkColorFilter> cf = adoptRef(SkColorFilter::CreateModeFilter(skColor,
SkXfermode::kSrcIn_Mode)); | 189 return m_layerInfo.size() == 2 |
101 paint->setColorFilter(cf.get()); | 190 && m_layerInfo[0].m_layerType == ShadowLayer |
| 191 && m_layerInfo[0].m_shadowAlphaMode == ShadowRespectsAlpha |
| 192 && m_layerInfo[0].m_shadowTransformMode == ShadowIgnoresTransforms |
| 193 && m_layerInfo[0].m_blur |
| 194 && m_layerInfo[1].m_layerType == UnmodifiedLayer; |
102 } | 195 } |
103 | 196 |
104 } // namespace WebCore | 197 } // namespace WebCore |
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