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| 1 /* | 1 /* |
| 2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 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 #ifndef GrClipMaskManager_DEFINED | 7 #ifndef GrClipMaskManager_DEFINED |
| 8 #define GrClipMaskManager_DEFINED | 8 #define GrClipMaskManager_DEFINED |
| 9 | 9 |
| 10 #include "GrClipMaskCache.h" | 10 #include "GrClipMaskCache.h" |
| (...skipping 25 matching lines...) Expand all Loading... |
| 36 public: | 36 public: |
| 37 GrClipMaskManager(GrClipTarget* owner); | 37 GrClipMaskManager(GrClipTarget* owner); |
| 38 | 38 |
| 39 /** | 39 /** |
| 40 * Creates a clip mask if necessary as a stencil buffer or alpha texture | 40 * Creates a clip mask if necessary as a stencil buffer or alpha texture |
| 41 * and sets the GrGpu's scissor and stencil state. If the return is false | 41 * and sets the GrGpu's scissor and stencil state. If the return is false |
| 42 * then the draw can be skipped. The AutoRestoreEffects is initialized by | 42 * then the draw can be skipped. The AutoRestoreEffects is initialized by |
| 43 * the manager when it must install additional effects to implement the | 43 * the manager when it must install additional effects to implement the |
| 44 * clip. devBounds is optional but can help optimize clipping. | 44 * clip. devBounds is optional but can help optimize clipping. |
| 45 */ | 45 */ |
| 46 bool setupClipping(GrPipelineBuilder*, | 46 bool setupClipping(const GrPipelineBuilder&, |
| 47 GrPipelineBuilder::AutoRestoreFragmentProcessors*, | 47 GrPipelineBuilder::AutoRestoreFragmentProcessors*, |
| 48 GrPipelineBuilder::AutoRestoreStencil*, | 48 GrPipelineBuilder::AutoRestoreStencil*, |
| 49 GrPipelineBuilder::AutoRestoreProcessorDataManager*, |
| 49 GrScissorState*, | 50 GrScissorState*, |
| 50 const SkRect* devBounds); | 51 const SkRect* devBounds); |
| 51 | 52 |
| 52 /** | 53 /** |
| 53 * Purge resources to free up memory. TODO: This class shouldn't hold any lo
ng lived refs | 54 * Purge resources to free up memory. TODO: This class shouldn't hold any lo
ng lived refs |
| 54 * which will allow Resourcecache to automatically purge anything this class
has created. | 55 * which will allow Resourcecache to automatically purge anything this class
has created. |
| 55 */ | 56 */ |
| 56 void purgeResources(); | 57 void purgeResources(); |
| 57 | 58 |
| 58 bool isClipInStencil() const { | 59 bool isClipInStencil() const { |
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| 79 kModifyClip_StencilClipMode, | 80 kModifyClip_StencilClipMode, |
| 80 // Clip against the existing representation of the clip in the high bit | 81 // Clip against the existing representation of the clip in the high bit |
| 81 // of the stencil buffer. | 82 // of the stencil buffer. |
| 82 kRespectClip_StencilClipMode, | 83 kRespectClip_StencilClipMode, |
| 83 // Neither writing to nor clipping against the clip bit. | 84 // Neither writing to nor clipping against the clip bit. |
| 84 kIgnoreClip_StencilClipMode, | 85 kIgnoreClip_StencilClipMode, |
| 85 }; | 86 }; |
| 86 | 87 |
| 87 // Attempts to install a series of coverage effects to implement the clip. R
eturn indicates | 88 // Attempts to install a series of coverage effects to implement the clip. R
eturn indicates |
| 88 // whether the element list was successfully converted to effects. | 89 // whether the element list was successfully converted to effects. |
| 89 bool installClipEffects(GrPipelineBuilder*, | 90 bool installClipEffects(const GrPipelineBuilder&, |
| 90 GrPipelineBuilder::AutoRestoreFragmentProcessors*, | 91 GrPipelineBuilder::AutoRestoreFragmentProcessors*, |
| 91 const GrReducedClip::ElementList&, | 92 const GrReducedClip::ElementList&, |
| 92 const SkVector& clipOffset, | 93 const SkVector& clipOffset, |
| 93 const SkRect* devBounds); | 94 const SkRect* devBounds); |
| 94 | 95 |
| 95 // Draws the clip into the stencil buffer | 96 // Draws the clip into the stencil buffer |
| 96 bool createStencilClipMask(GrRenderTarget*, | 97 bool createStencilClipMask(GrRenderTarget*, |
| 97 int32_t elementsGenID, | 98 int32_t elementsGenID, |
| 98 GrReducedClip::InitialState initialState, | 99 GrReducedClip::InitialState initialState, |
| 99 const GrReducedClip::ElementList& elements, | 100 const GrReducedClip::ElementList& elements, |
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| 118 // Returns the cached mask texture if it matches the elementsGenID and the c
lipSpaceIBounds. | 119 // Returns the cached mask texture if it matches the elementsGenID and the c
lipSpaceIBounds. |
| 119 // Returns NULL if not found. | 120 // Returns NULL if not found. |
| 120 GrTexture* getCachedMaskTexture(int32_t elementsGenID, const SkIRect& clipSp
aceIBounds); | 121 GrTexture* getCachedMaskTexture(int32_t elementsGenID, const SkIRect& clipSp
aceIBounds); |
| 121 | 122 |
| 122 // Handles allocation (if needed) of a clip alpha-mask texture for both the
sw-upload | 123 // Handles allocation (if needed) of a clip alpha-mask texture for both the
sw-upload |
| 123 // or gpu-rendered cases. | 124 // or gpu-rendered cases. |
| 124 GrTexture* allocMaskTexture(int32_t elementsGenID, | 125 GrTexture* allocMaskTexture(int32_t elementsGenID, |
| 125 const SkIRect& clipSpaceIBounds, | 126 const SkIRect& clipSpaceIBounds, |
| 126 bool willUpload); | 127 bool willUpload); |
| 127 | 128 |
| 128 bool useSWOnlyPath(const GrPipelineBuilder*, | 129 bool useSWOnlyPath(const GrPipelineBuilder&, |
| 129 const SkVector& clipToMaskOffset, | 130 const SkVector& clipToMaskOffset, |
| 130 const GrReducedClip::ElementList& elements); | 131 const GrReducedClip::ElementList& elements); |
| 131 | 132 |
| 132 // Draws a clip element into the target alpha mask. The caller should have a
lready setup the | 133 // Draws a clip element into the target alpha mask. The caller should have a
lready setup the |
| 133 // desired blend operation. Optionally if the caller already selected a path
renderer it can | 134 // desired blend operation. Optionally if the caller already selected a path
renderer it can |
| 134 // be passed. Otherwise the function will select one if the element is a pat
h. | 135 // be passed. Otherwise the function will select one if the element is a pat
h. |
| 135 bool drawElement(GrPipelineBuilder*, | 136 bool drawElement(GrPipelineBuilder*, |
| 136 const SkMatrix& viewMatrix, | 137 const SkMatrix& viewMatrix, |
| 137 GrTexture* target, | 138 GrTexture* target, |
| 138 const SkClipStack::Element*, | 139 const SkClipStack::Element*, |
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| 154 const SkIRect& srcBound); | 155 const SkIRect& srcBound); |
| 155 | 156 |
| 156 GrTexture* createTempMask(int width, int height); | 157 GrTexture* createTempMask(int width, int height); |
| 157 | 158 |
| 158 void setupCache(const SkClipStack& clip, | 159 void setupCache(const SkClipStack& clip, |
| 159 const SkIRect& bounds); | 160 const SkIRect& bounds); |
| 160 /** | 161 /** |
| 161 * Called prior to return control back the GrGpu in setupClipping. It update
s the | 162 * Called prior to return control back the GrGpu in setupClipping. It update
s the |
| 162 * GrPipelineBuilder with stencil settings that account for stencil-based cl
ipping. | 163 * GrPipelineBuilder with stencil settings that account for stencil-based cl
ipping. |
| 163 */ | 164 */ |
| 164 void setPipelineBuilderStencil(GrPipelineBuilder*, GrPipelineBuilder::AutoRe
storeStencil*); | 165 void setPipelineBuilderStencil(const GrPipelineBuilder&, |
| 166 GrPipelineBuilder::AutoRestoreStencil*); |
| 165 | 167 |
| 166 /** | 168 /** |
| 167 * Adjusts the stencil settings to account for interaction with stencil | 169 * Adjusts the stencil settings to account for interaction with stencil |
| 168 * clipping. | 170 * clipping. |
| 169 */ | 171 */ |
| 170 void adjustStencilParams(GrStencilSettings* settings, | 172 void adjustStencilParams(GrStencilSettings* settings, |
| 171 StencilClipMode mode, | 173 StencilClipMode mode, |
| 172 int stencilBitCnt); | 174 int stencilBitCnt); |
| 173 | 175 |
| 174 /** | 176 /** |
| 175 * We may represent the clip as a mask in the stencil buffer or as an alpha | 177 * We may represent the clip as a mask in the stencil buffer or as an alpha |
| 176 * texture. It may be neither because the scissor rect suffices or we | 178 * texture. It may be neither because the scissor rect suffices or we |
| 177 * haven't yet examined the clip. | 179 * haven't yet examined the clip. |
| 178 */ | 180 */ |
| 179 enum ClipMaskType { | 181 enum ClipMaskType { |
| 180 kNone_ClipMaskType, | 182 kNone_ClipMaskType, |
| 181 kStencil_ClipMaskType, | 183 kStencil_ClipMaskType, |
| 182 kAlpha_ClipMaskType, | 184 kAlpha_ClipMaskType, |
| 183 } fCurrClipMaskType; | 185 } fCurrClipMaskType; |
| 184 | 186 |
| 185 GrClipMaskCache fAACache; // cache for the AA path | 187 GrClipMaskCache fAACache; // cache for the AA path |
| 186 GrClipTarget* fClipTarget; // This is our owning clip target. | 188 GrClipTarget* fClipTarget; // This is our owning clip target. |
| 187 StencilClipMode fClipMode; | 189 StencilClipMode fClipMode; |
| 188 | 190 |
| 189 typedef SkNoncopyable INHERITED; | 191 typedef SkNoncopyable INHERITED; |
| 190 }; | 192 }; |
| 191 #endif // GrClipMaskManager_DEFINED | 193 #endif // GrClipMaskManager_DEFINED |
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