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Side by Side Diff: src/gpu/GrDrawState.h

Issue 582963002: Solo gp (Closed) Base URL: https://skia.googlesource.com/skia.git@no_peb
Patch Set: rebase Created 6 years, 2 months ago
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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 GrDrawState_DEFINED 8 #ifndef GrDrawState_DEFINED
9 #define GrDrawState_DEFINED 9 #define GrDrawState_DEFINED
10 10
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45 } 45 }
46 46
47 /** 47 /**
48 * Copies another draw state with a preconcat to the view matrix. 48 * Copies another draw state with a preconcat to the view matrix.
49 **/ 49 **/
50 GrDrawState(const GrDrawState& state, const SkMatrix& preConcatMatrix); 50 GrDrawState(const GrDrawState& state, const SkMatrix& preConcatMatrix);
51 51
52 virtual ~GrDrawState(); 52 virtual ~GrDrawState();
53 53
54 /** 54 /**
55 * Resets to the default state. GrEffects will be removed from all stages. 55 * Resets to the default state. GrProcessors will be removed from all stages .
56 */ 56 */
57 void reset() { this->onReset(NULL); } 57 void reset() { this->onReset(NULL); }
58 58
59 void reset(const SkMatrix& initialViewMatrix) { this->onReset(&initialViewMa trix); } 59 void reset(const SkMatrix& initialViewMatrix) { this->onReset(&initialViewMa trix); }
60 60
61 /** 61 /**
62 * Initializes the GrDrawState based on a GrPaint, view matrix and render ta rget. Note that 62 * Initializes the GrDrawState based on a GrPaint, view matrix and render ta rget. Note that
63 * GrDrawState encompasses more than GrPaint. Aspects of GrDrawState that ha ve no GrPaint 63 * GrDrawState encompasses more than GrPaint. Aspects of GrDrawState that ha ve no GrPaint
64 * equivalents are set to default values with the exception of vertex attrib ute state which 64 * equivalents are set to default values with the exception of vertex attrib ute state which
65 * is unmodified by this function and clipping which will be enabled. 65 * is unmodified by this function and clipping which will be enabled.
66 */ 66 */
67 void setFromPaint(const GrPaint& , const SkMatrix& viewMatrix, GrRenderTarge t*); 67 void setFromPaint(const GrPaint& , const SkMatrix& viewMatrix, GrRenderTarge t*);
68 68
69 /////////////////////////////////////////////////////////////////////////// 69 ///////////////////////////////////////////////////////////////////////////
70 /// @name Vertex Attributes 70 /// @name Vertex Attributes
71 //// 71 ////
72 72
73 /** 73 /**
74 * The format of vertices is represented as an array of GrVertexAttribs, wit h each representing 74 * The format of vertices is represented as an array of GrVertexAttribs, wit h each representing
75 * the type of the attribute, its offset, and semantic binding (see GrVertex Attrib in 75 * the type of the attribute, its offset, and semantic binding (see GrVertex Attrib in
76 * GrTypesPriv.h). 76 * GrTypesPriv.h).
77 * 77 *
78 * The mapping of attributes with kEffect bindings to GrEffect inputs is spe cified when 78 * The mapping of attributes with kEffect bindings to GrProcessor inputs is specified when
79 * setEffect is called. 79 * setEffect is called.
80 */ 80 */
81 81
82 /** 82 /**
83 * Sets vertex attributes for next draw. The object driving the templatizat ion 83 * Sets vertex attributes for next draw. The object driving the templatizat ion
84 * should be a global GrVertexAttrib array that is never changed. 84 * should be a global GrVertexAttrib array that is never changed.
85 * 85 *
86 * @param count the number of attributes being set, limited to kMaxVer texAttribCnt. 86 * @param count the number of attributes being set, limited to kMaxVer texAttribCnt.
87 * @param stride the number of bytes between successive vertex data. 87 * @param stride the number of bytes between successive vertex data.
88 */ 88 */
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172 } 172 }
173 173
174 /// @} 174 /// @}
175 175
176 /** 176 /**
177 * The geometry processor is the sole element of the skia pipeline which can use the vertex, 177 * The geometry processor is the sole element of the skia pipeline which can use the vertex,
178 * geometry, and tesselation shaders. The GP may also compute a coverage in its fragment shader 178 * geometry, and tesselation shaders. The GP may also compute a coverage in its fragment shader
179 * but is never put in the color processing pipeline. 179 * but is never put in the color processing pipeline.
180 */ 180 */
181 181
182 const GrEffect* setGeometryProcessor(const GrEffect* effect) { 182 const GrGeometryProcessor* setGeometryProcessor(const GrGeometryProcessor* g eometryProcessor) {
183 SkASSERT(effect); 183 SkASSERT(geometryProcessor);
184 SkASSERT(effect->requiresVertexShader());
185 SkASSERT(!this->hasGeometryProcessor()); 184 SkASSERT(!this->hasGeometryProcessor());
186 fGeometryProcessor.reset(new GrEffectStage(effect)); 185 fGeometryProcessor.reset(new GrGeometryStage(geometryProcessor));
187 this->invalidateOptState(); 186 this->invalidateOptState();
188 return effect; 187 return geometryProcessor;
189 } 188 }
190 189
191 /////////////////////////////////////////////////////////////////////////// 190 ///////////////////////////////////////////////////////////////////////////
192 /// @name Effect Stages 191 /// @name Effect Stages
193 /// Each stage hosts a GrEffect. The effect produces an output color or cove rage in the fragment 192 /// Each stage hosts a GrProcessor. The effect produces an output color or c overage in the
194 /// shader. Its inputs are the output from the previous stage as well as som e variables 193 /// fragment shader. Its inputs are the output from the previous stage as we ll as some variables
195 /// available to it in the fragment and vertex shader (e.g. the vertex posit ion, the dst color, 194 /// available to it in the fragment and vertex shader (e.g. the vertex posit ion, the dst color,
196 /// the fragment position, local coordinates). 195 /// the fragment position, local coordinates).
197 /// 196 ///
198 /// The stages are divided into two sets, color-computing and coverage-compu ting. The final 197 /// The stages are divided into two sets, color-computing and coverage-compu ting. The final
199 /// color stage produces the final pixel color. The coverage-computing stage s function exactly 198 /// color stage produces the final pixel color. The coverage-computing stage s function exactly
200 /// as the color-computing but the output of the final coverage stage is tre ated as a fractional 199 /// as the color-computing but the output of the final coverage stage is tre ated as a fractional
201 /// pixel coverage rather than as input to the src/dst color blend step. 200 /// pixel coverage rather than as input to the src/dst color blend step.
202 /// 201 ///
203 /// The input color to the first color-stage is either the constant color or interpolated 202 /// The input color to the first color-stage is either the constant color or interpolated
204 /// per-vertex colors. The input to the first coverage stage is either a con stant coverage 203 /// per-vertex colors. The input to the first coverage stage is either a con stant coverage
205 /// (usually full-coverage) or interpolated per-vertex coverage. 204 /// (usually full-coverage) or interpolated per-vertex coverage.
206 /// 205 ///
207 /// See the documentation of kCoverageDrawing_StateBit for information about disabling the 206 /// See the documentation of kCoverageDrawing_StateBit for information about disabling the
208 /// the color / coverage distinction. 207 /// the color / coverage distinction.
209 //// 208 ////
210 209
211 const GrEffect* addColorEffect(const GrEffect* effect) { 210 const GrFragmentProcessor* addColorProcessor(const GrFragmentProcessor* effe ct) {
212 SkASSERT(effect); 211 SkASSERT(effect);
213 SkASSERT(!effect->requiresVertexShader()); 212 SkNEW_APPEND_TO_TARRAY(&fColorStages, GrFragmentStage, (effect));
214 SkNEW_APPEND_TO_TARRAY(&fColorStages, GrEffectStage, (effect));
215 this->invalidateOptState(); 213 this->invalidateOptState();
216 return effect; 214 return effect;
217 } 215 }
218 216
219 const GrEffect* addCoverageEffect(const GrEffect* effect) { 217 const GrFragmentProcessor* addCoverageProcessor(const GrFragmentProcessor* e ffect) {
220 SkASSERT(effect); 218 SkASSERT(effect);
221 SkASSERT(!effect->requiresVertexShader()); 219 SkNEW_APPEND_TO_TARRAY(&fCoverageStages, GrFragmentStage, (effect));
222 SkNEW_APPEND_TO_TARRAY(&fCoverageStages, GrEffectStage, (effect));
223 this->invalidateOptState(); 220 this->invalidateOptState();
224 return effect; 221 return effect;
225 } 222 }
226 223
227 /** 224 /**
228 * Creates a GrSimpleTextureEffect that uses local coords as texture coordin ates. 225 * Creates a GrSimpleTextureEffect that uses local coords as texture coordin ates.
229 */ 226 */
230 void addColorTextureEffect(GrTexture* texture, const SkMatrix& matrix) { 227 void addColorTextureProcessor(GrTexture* texture, const SkMatrix& matrix) {
231 this->addColorEffect(GrSimpleTextureEffect::Create(texture, matrix))->un ref(); 228 this->addColorProcessor(GrSimpleTextureEffect::Create(texture, matrix))- >unref();
232 } 229 }
233 230
234 void addCoverageTextureEffect(GrTexture* texture, const SkMatrix& matrix) { 231 void addCoverageTextureProcessor(GrTexture* texture, const SkMatrix& matrix) {
235 this->addCoverageEffect(GrSimpleTextureEffect::Create(texture, matrix))- >unref(); 232 this->addCoverageProcessor(GrSimpleTextureEffect::Create(texture, matrix ))->unref();
236 } 233 }
237 234
238 void addColorTextureEffect(GrTexture* texture, 235 void addColorTextureProcessor(GrTexture* texture,
239 const SkMatrix& matrix, 236 const SkMatrix& matrix,
240 const GrTextureParams& params) { 237 const GrTextureParams& params) {
241 this->addColorEffect(GrSimpleTextureEffect::Create(texture, matrix, para ms))->unref(); 238 this->addColorProcessor(GrSimpleTextureEffect::Create(texture, matrix, p arams))->unref();
242 } 239 }
243 240
244 void addCoverageTextureEffect(GrTexture* texture, 241 void addCoverageTextureProcessor(GrTexture* texture,
245 const SkMatrix& matrix, 242 const SkMatrix& matrix,
246 const GrTextureParams& params) { 243 const GrTextureParams& params) {
247 this->addCoverageEffect(GrSimpleTextureEffect::Create(texture, matrix, p arams))->unref(); 244 this->addCoverageProcessor(GrSimpleTextureEffect::Create(texture, matrix , params))->unref();
248 } 245 }
249 246
250 /** 247 /**
251 * When this object is destroyed it will remove any color/coverage effects f rom the draw state 248 * When this object is destroyed it will remove any color/coverage effects f rom the draw state
252 * that were added after its constructor. 249 * that were added after its constructor.
253 * 250 *
254 * This class has strange behavior around geometry processor. If there is a GP on the draw state 251 * This class has strange behavior around geometry processor. If there is a GP on the draw state
255 * it will assert that the GP is not modified until after the destructor of the ARE. If the 252 * it will assert that the GP is not modified until after the destructor of the ARE. If the
256 * draw state has a NULL GP when the ARE is constructed then it will reset i t to null in the 253 * draw state has a NULL GP when the ARE is constructed then it will reset i t to null in the
257 * destructor. 254 * destructor.
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380 377
381 void set(GrDrawState* drawState, const SkMatrix& preconcatMatrix); 378 void set(GrDrawState* drawState, const SkMatrix& preconcatMatrix);
382 379
383 /** Sets the draw state's matrix to identity. This can fail because the current view matrix 380 /** Sets the draw state's matrix to identity. This can fail because the current view matrix
384 is not invertible. */ 381 is not invertible. */
385 bool setIdentity(GrDrawState* drawState); 382 bool setIdentity(GrDrawState* drawState);
386 383
387 private: 384 private:
388 void doEffectCoordChanges(const SkMatrix& coordChangeMatrix); 385 void doEffectCoordChanges(const SkMatrix& coordChangeMatrix);
389 386
390 GrDrawState* fDrawState; 387 GrDrawState* fDrawState;
391 SkMatrix fViewMatrix; 388 SkMatrix fViewMatrix;
392 int fNumColorStages; 389 int fNumColorStages;
393 bool fHasGeometryProcesso r; 390 bool fHasGeometryProce ssor;
394 SkAutoSTArray<8, GrEffectStage::SavedCoordChange> fSavedCoordChanges; 391 SkAutoSTArray<8, GrProcessorStage::SavedCoordChange> fSavedCoordChange s;
395 }; 392 };
396 393
397 /// @} 394 /// @}
398 395
399 /////////////////////////////////////////////////////////////////////////// 396 ///////////////////////////////////////////////////////////////////////////
400 /// @name Render Target 397 /// @name Render Target
401 //// 398 ////
402 399
403 /** 400 /**
404 * Sets the render-target used at the next drawing call 401 * Sets the render-target used at the next drawing call
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561 558
562 void internalSetVertexAttribs(const GrVertexAttrib attribs[], int count, siz e_t stride); 559 void internalSetVertexAttribs(const GrVertexAttrib attribs[], int count, siz e_t stride);
563 560
564 mutable GrOptDrawState* fCachedOptState; 561 mutable GrOptDrawState* fCachedOptState;
565 mutable uint32_t fCachedCapsID; 562 mutable uint32_t fCachedCapsID;
566 563
567 typedef GrRODrawState INHERITED; 564 typedef GrRODrawState INHERITED;
568 }; 565 };
569 566
570 #endif 567 #endif
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