| OLD | NEW |
| 1 /* | 1 /* |
| 2 * Copyright 2011 Google Inc. | 2 * Copyright 2011 Google Inc. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
| 6 */ | 6 */ |
| 7 | 7 |
| 8 #ifndef GrPathRenderer_DEFINED | 8 #ifndef GrPathRenderer_DEFINED |
| 9 #define GrPathRenderer_DEFINED | 9 #define GrPathRenderer_DEFINED |
| 10 | 10 |
| 11 #include "GrDrawTarget.h" | 11 #include "GrDrawTarget.h" |
| 12 #include "GrStencil.h" | 12 #include "GrStencil.h" |
| 13 #include "GrStrokeInfo.h" | 13 #include "GrStyle.h" |
| 14 | 14 |
| 15 #include "SkDrawProcs.h" | 15 #include "SkDrawProcs.h" |
| 16 #include "SkTArray.h" | 16 #include "SkTArray.h" |
| 17 | 17 |
| 18 class SkPath; | 18 class SkPath; |
| 19 | |
| 20 struct GrPoint; | 19 struct GrPoint; |
| 21 | 20 |
| 22 /** | 21 /** |
| 23 * Base class for drawing paths into a GrDrawTarget. | 22 * Base class for drawing paths into a GrDrawTarget. |
| 24 * | 23 * |
| 25 * Derived classes can use stages GrPaint::kTotalStages through GrPipelineBuild
er::kNumStages-1. | 24 * Derived classes can use stages GrPaint::kTotalStages through GrPipelineBuild
er::kNumStages-1. |
| 26 * The stages before GrPaint::kTotalStages are reserved for setting up the draw
(i.e., textures and | 25 * The stages before GrPaint::kTotalStages are reserved for setting up the draw
(i.e., textures and |
| 27 * filter masks). | 26 * filter masks). |
| 28 */ | 27 */ |
| 29 class SK_API GrPathRenderer : public SkRefCnt { | 28 class SK_API GrPathRenderer : public SkRefCnt { |
| (...skipping 35 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 65 SkASSERT(!path.isInverseFillType()); | 64 SkASSERT(!path.isInverseFillType()); |
| 66 return this->onGetStencilSupport(path); | 65 return this->onGetStencilSupport(path); |
| 67 } | 66 } |
| 68 | 67 |
| 69 /** Args to canDrawPath() | 68 /** Args to canDrawPath() |
| 70 * | 69 * |
| 71 * fShaderCaps The shader caps | 70 * fShaderCaps The shader caps |
| 72 * fPipelineBuilder The pipelineBuilder | 71 * fPipelineBuilder The pipelineBuilder |
| 73 * fViewMatrix The viewMatrix | 72 * fViewMatrix The viewMatrix |
| 74 * fPath The path to draw | 73 * fPath The path to draw |
| 75 * fStroke The stroke information (width, join, cap) | 74 * fStyle The styling info (path effect, stroking info) |
| 76 * fAntiAlias True if anti-aliasing is required. | 75 * fAntiAlias True if anti-aliasing is required. |
| 77 */ | 76 */ |
| 78 struct CanDrawPathArgs { | 77 struct CanDrawPathArgs { |
| 79 const GrShaderCaps* fShaderCaps; | 78 const GrShaderCaps* fShaderCaps; |
| 80 const SkMatrix* fViewMatrix; | 79 const SkMatrix* fViewMatrix; |
| 81 const SkPath* fPath; | 80 const SkPath* fPath; |
| 82 const GrStrokeInfo* fStroke; | 81 const GrStyle* fStyle; |
| 83 bool fAntiAlias; | 82 bool fAntiAlias; |
| 84 | 83 |
| 85 // These next two are only used by GrStencilAndCoverPathRenderer | 84 // These next two are only used by GrStencilAndCoverPathRenderer |
| 86 bool fIsStencilDisabled; | 85 bool fIsStencilDisabled; |
| 87 bool fIsStencilBufferMSAA; | 86 bool fIsStencilBufferMSAA; |
| 88 | 87 |
| 89 void validate() const { | 88 void validate() const { |
| 90 SkASSERT(fShaderCaps); | 89 SkASSERT(fShaderCaps); |
| 91 SkASSERT(fViewMatrix); | 90 SkASSERT(fViewMatrix); |
| 92 SkASSERT(fPath); | 91 SkASSERT(fPath); |
| 93 SkASSERT(fStroke); | 92 SkASSERT(fStyle); |
| 94 SkASSERT(!fPath->isEmpty()); | 93 SkASSERT(!fPath->isEmpty()); |
| 95 } | 94 } |
| 96 }; | 95 }; |
| 97 | 96 |
| 98 /** | 97 /** |
| 99 * Returns true if this path renderer is able to render the path. Returning
false allows the | 98 * Returns true if this path renderer is able to render the path. Returning
false allows the |
| 100 * caller to fallback to another path renderer This function is called when
searching for a path | 99 * caller to fallback to another path renderer This function is called when
searching for a path |
| 101 * renderer capable of rendering a path. | 100 * renderer capable of rendering a path. |
| 102 * | 101 * |
| 103 * @return true if the path can be drawn by this object, false otherwise. | 102 * @return true if the path can be drawn by this object, false otherwise. |
| 104 */ | 103 */ |
| 105 bool canDrawPath(const CanDrawPathArgs& args) const { | 104 bool canDrawPath(const CanDrawPathArgs& args) const { |
| 106 SkDEBUGCODE(args.validate();) | 105 SkDEBUGCODE(args.validate();) |
| 107 return this->onCanDrawPath(args); | 106 return this->onCanDrawPath(args); |
| 108 } | 107 } |
| 109 | 108 |
| 110 /** | 109 /** |
| 111 * Args to drawPath() | 110 * Args to drawPath() |
| 112 * | 111 * |
| 113 * fTarget The target that the path will be rendered to | 112 * fTarget The target that the path will be rendered to |
| 114 * fResourceProvider The resource provider for creating gpu resources t
o render the path | 113 * fResourceProvider The resource provider for creating gpu resources t
o render the path |
| 115 * fPipelineBuilder The pipelineBuilder | 114 * fPipelineBuilder The pipelineBuilder |
| 116 * fColor Color to render with | 115 * fColor Color to render with |
| 117 * fViewMatrix The viewMatrix | 116 * fViewMatrix The viewMatrix |
| 118 * fPath the path to draw. | 117 * fPath the path to draw. |
| 119 * fStroke the stroke information (width, join, cap) | 118 * fStyle the style information (path effect, stroke info) |
| 120 * fAntiAlias true if anti-aliasing is required. | 119 * fAntiAlias true if anti-aliasing is required. |
| 121 * fGammaCorrect true if gamma-correct rendering is to be used. | 120 * fGammaCorrect true if gamma-correct rendering is to be used. |
| 122 */ | 121 */ |
| 123 struct DrawPathArgs { | 122 struct DrawPathArgs { |
| 124 GrDrawTarget* fTarget; | 123 GrDrawTarget* fTarget; |
| 125 GrResourceProvider* fResourceProvider; | 124 GrResourceProvider* fResourceProvider; |
| 126 GrPipelineBuilder* fPipelineBuilder; | 125 GrPipelineBuilder* fPipelineBuilder; |
| 127 GrColor fColor; | 126 GrColor fColor; |
| 128 const SkMatrix* fViewMatrix; | 127 const SkMatrix* fViewMatrix; |
| 129 const SkPath* fPath; | 128 const SkPath* fPath; |
| 130 const GrStrokeInfo* fStroke; | 129 const GrStyle* fStyle; |
| 131 bool fAntiAlias; | 130 bool fAntiAlias; |
| 132 bool fGammaCorrect; | 131 bool fGammaCorrect; |
| 133 | 132 |
| 134 void validate() const { | 133 void validate() const { |
| 135 SkASSERT(fTarget); | 134 SkASSERT(fTarget); |
| 136 SkASSERT(fResourceProvider); | 135 SkASSERT(fResourceProvider); |
| 137 SkASSERT(fPipelineBuilder); | 136 SkASSERT(fPipelineBuilder); |
| 138 SkASSERT(fViewMatrix); | 137 SkASSERT(fViewMatrix); |
| 139 SkASSERT(fPath); | 138 SkASSERT(fPath); |
| 140 SkASSERT(fStroke); | 139 SkASSERT(fStyle); |
| 141 SkASSERT(!fPath->isEmpty()); | 140 SkASSERT(!fPath->isEmpty()); |
| 142 } | 141 } |
| 143 }; | 142 }; |
| 144 | 143 |
| 145 /** | 144 /** |
| 146 * Draws the path into the draw target. If getStencilSupport() would return
kNoRestriction then | 145 * Draws the path into the draw target. If getStencilSupport() would return
kNoRestriction then |
| 147 * the subclass must respect the stencil settings of the GrPipelineBuilder. | 146 * the subclass must respect the stencil settings of the GrPipelineBuilder. |
| 148 */ | 147 */ |
| 149 bool drawPath(const DrawPathArgs& args) { | 148 bool drawPath(const DrawPathArgs& args) { |
| 150 SkDEBUGCODE(args.validate();) | 149 SkDEBUGCODE(args.validate();) |
| 151 #ifdef SK_DEBUG | 150 #ifdef SK_DEBUG |
| 152 CanDrawPathArgs canArgs; | 151 CanDrawPathArgs canArgs; |
| 153 canArgs.fShaderCaps = args.fTarget->caps()->shaderCaps(); | 152 canArgs.fShaderCaps = args.fTarget->caps()->shaderCaps(); |
| 154 canArgs.fViewMatrix = args.fViewMatrix; | 153 canArgs.fViewMatrix = args.fViewMatrix; |
| 155 canArgs.fPath = args.fPath; | 154 canArgs.fPath = args.fPath; |
| 156 canArgs.fStroke = args.fStroke; | 155 canArgs.fStyle = args.fStyle; |
| 157 canArgs.fAntiAlias = args.fAntiAlias; | 156 canArgs.fAntiAlias = args.fAntiAlias; |
| 158 | 157 |
| 159 canArgs.fIsStencilDisabled = args.fPipelineBuilder->getStencil().isDisab
led(); | 158 canArgs.fIsStencilDisabled = args.fPipelineBuilder->getStencil().isDisab
led(); |
| 160 canArgs.fIsStencilBufferMSAA = | 159 canArgs.fIsStencilBufferMSAA = |
| 161 args.fPipelineBuilder->getRenderTarget()->isStencilBuf
ferMultisampled(); | 160 args.fPipelineBuilder->getRenderTarget()->isStencilBuf
ferMultisampled(); |
| 162 SkASSERT(this->canDrawPath(canArgs)); | 161 SkASSERT(this->canDrawPath(canArgs)); |
| 163 if (!args.fPipelineBuilder->getStencil().isDisabled()) { | 162 if (!args.fPipelineBuilder->getStencil().isDisabled()) { |
| 164 SkASSERT(kNoRestriction_StencilSupport == this->getStencilSupport(*a
rgs.fPath)); | 163 SkASSERT(kNoRestriction_StencilSupport == this->getStencilSupport(*a
rgs.fPath)); |
| 165 SkASSERT(!args.fStroke->isDashed()); | 164 SkASSERT(args.fStyle->isSimpleFill()); |
| 166 SkASSERT(args.fStroke->isFillStyle()); | |
| 167 } | 165 } |
| 168 #endif | 166 #endif |
| 169 return this->onDrawPath(args); | 167 return this->onDrawPath(args); |
| 170 } | 168 } |
| 171 | 169 |
| 172 /* Args to stencilPath(). | 170 /* Args to stencilPath(). |
| 173 * | 171 * |
| 174 * fTarget The target that the path will be rendered to. | 172 * fTarget The target that the path will be rendered to. |
| 175 * fResourceProvider The resource provider for creating gpu resources t
o render the path | 173 * fResourceProvider The resource provider for creating gpu resources t
o render the path |
| 176 * fPipelineBuilder The pipeline builder. | 174 * fPipelineBuilder The pipeline builder. |
| (...skipping 13 matching lines...) Expand all Loading... |
| 190 SkASSERT(fPipelineBuilder); | 188 SkASSERT(fPipelineBuilder); |
| 191 SkASSERT(fViewMatrix); | 189 SkASSERT(fViewMatrix); |
| 192 SkASSERT(fPath); | 190 SkASSERT(fPath); |
| 193 SkASSERT(!fPath->isEmpty()); | 191 SkASSERT(!fPath->isEmpty()); |
| 194 } | 192 } |
| 195 }; | 193 }; |
| 196 | 194 |
| 197 /** | 195 /** |
| 198 * Draws the path to the stencil buffer. Assume the writable stencil bits ar
e already | 196 * Draws the path to the stencil buffer. Assume the writable stencil bits ar
e already |
| 199 * initialized to zero. The pixels inside the path will have non-zero stenci
l values afterwards. | 197 * initialized to zero. The pixels inside the path will have non-zero stenci
l values afterwards. |
| 200 * | |
| 201 */ | 198 */ |
| 202 void stencilPath(const StencilPathArgs& args) { | 199 void stencilPath(const StencilPathArgs& args) { |
| 203 SkDEBUGCODE(args.validate();) | 200 SkDEBUGCODE(args.validate();) |
| 204 SkASSERT(kNoSupport_StencilSupport != this->getStencilSupport(*args.fPat
h)); | 201 SkASSERT(kNoSupport_StencilSupport != this->getStencilSupport(*args.fPat
h)); |
| 205 | |
| 206 this->onStencilPath(args); | 202 this->onStencilPath(args); |
| 207 } | 203 } |
| 208 | 204 |
| 209 // Helper for determining if we can treat a thin stroke as a hairline w/ cov
erage. | 205 // Helper for determining if we can treat a thin stroke as a hairline w/ cov
erage. |
| 210 // If we can, we draw lots faster (raster device does this same test). | 206 // If we can, we draw lots faster (raster device does this same test). |
| 211 static bool IsStrokeHairlineOrEquivalent(const GrStrokeInfo& stroke, const S
kMatrix& matrix, | 207 static bool IsStrokeHairlineOrEquivalent(const GrStyle& style, const SkMatri
x& matrix, |
| 212 SkScalar* outCoverage) { | 208 SkScalar* outCoverage) { |
| 213 if (stroke.isDashed()) { | 209 if (style.pathEffect()) { |
| 214 return false; | 210 return false; |
| 215 } | 211 } |
| 212 const SkStrokeRec& stroke = style.strokeRec(); |
| 216 if (stroke.isHairlineStyle()) { | 213 if (stroke.isHairlineStyle()) { |
| 217 if (outCoverage) { | 214 if (outCoverage) { |
| 218 *outCoverage = SK_Scalar1; | 215 *outCoverage = SK_Scalar1; |
| 219 } | 216 } |
| 220 return true; | 217 return true; |
| 221 } | 218 } |
| 222 return stroke.getStyle() == SkStrokeRec::kStroke_Style && | 219 return stroke.getStyle() == SkStrokeRec::kStroke_Style && |
| 223 SkDrawTreatAAStrokeAsHairline(stroke.getWidth(), matrix, outCoverage
); | 220 SkDrawTreatAAStrokeAsHairline(stroke.getWidth(), matrix, outCoverage
); |
| 224 } | 221 } |
| 225 | 222 |
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| 272 0xffff); | 269 0xffff); |
| 273 args.fPipelineBuilder->setStencil(kIncrementStencil); | 270 args.fPipelineBuilder->setStencil(kIncrementStencil); |
| 274 args.fPipelineBuilder->setDisableColorXPFactory(); | 271 args.fPipelineBuilder->setDisableColorXPFactory(); |
| 275 DrawPathArgs drawArgs; | 272 DrawPathArgs drawArgs; |
| 276 drawArgs.fTarget = args.fTarget; | 273 drawArgs.fTarget = args.fTarget; |
| 277 drawArgs.fResourceProvider = args.fResourceProvider; | 274 drawArgs.fResourceProvider = args.fResourceProvider; |
| 278 drawArgs.fPipelineBuilder = args.fPipelineBuilder; | 275 drawArgs.fPipelineBuilder = args.fPipelineBuilder; |
| 279 drawArgs.fColor = 0xFFFFFFFF; | 276 drawArgs.fColor = 0xFFFFFFFF; |
| 280 drawArgs.fViewMatrix = args.fViewMatrix; | 277 drawArgs.fViewMatrix = args.fViewMatrix; |
| 281 drawArgs.fPath = args.fPath; | 278 drawArgs.fPath = args.fPath; |
| 282 drawArgs.fStroke = &GrStrokeInfo::FillInfo(); | 279 drawArgs.fStyle = &GrStyle::SimpleFill(); |
| 283 drawArgs.fAntiAlias = false; | 280 drawArgs.fAntiAlias = false; |
| 284 drawArgs.fGammaCorrect = false; | 281 drawArgs.fGammaCorrect = false; |
| 285 this->drawPath(drawArgs); | 282 this->drawPath(drawArgs); |
| 286 } | 283 } |
| 287 | 284 |
| 288 | |
| 289 typedef SkRefCnt INHERITED; | 285 typedef SkRefCnt INHERITED; |
| 290 }; | 286 }; |
| 291 | 287 |
| 292 #endif | 288 #endif |
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