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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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42 * Copies another draw state. | 42 * Copies another draw state. |
43 **/ | 43 **/ |
44 GrDrawState(const GrDrawState& state) : INHERITED() { | 44 GrDrawState(const GrDrawState& state) : INHERITED() { |
45 SkDEBUGCODE(fBlockEffectRemovalCnt = 0;) | 45 SkDEBUGCODE(fBlockEffectRemovalCnt = 0;) |
46 *this = state; | 46 *this = state; |
47 } | 47 } |
48 | 48 |
49 /** | 49 /** |
50 * Copies another draw state with a preconcat to the view matrix. | 50 * Copies another draw state with a preconcat to the view matrix. |
51 **/ | 51 **/ |
52 GrDrawState(const GrDrawState& state, const SkMatrix& preConcatMatrix) { | 52 GrDrawState(const GrDrawState& state, const SkMatrix& preConcatMatrix); |
53 SkDEBUGCODE(fBlockEffectRemovalCnt = 0;) | |
54 *this = state; | |
55 if (!preConcatMatrix.isIdentity()) { | |
56 for (int i = 0; i < fColorStages.count(); ++i) { | |
57 fColorStages[i].localCoordChange(preConcatMatrix); | |
58 } | |
59 for (int i = 0; i < fCoverageStages.count(); ++i) { | |
60 fCoverageStages[i].localCoordChange(preConcatMatrix); | |
61 } | |
62 this->invalidateBlendOptFlags(); | |
63 } | |
64 } | |
65 | 53 |
66 virtual ~GrDrawState() { SkASSERT(0 == fBlockEffectRemovalCnt); } | 54 virtual ~GrDrawState() { SkASSERT(0 == fBlockEffectRemovalCnt); } |
67 | 55 |
68 /** | 56 /** |
69 * Resets to the default state. GrEffects will be removed from all stages. | 57 * Resets to the default state. GrEffects will be removed from all stages. |
70 */ | 58 */ |
71 void reset() { this->onReset(NULL); } | 59 void reset() { this->onReset(NULL); } |
72 | 60 |
73 void reset(const SkMatrix& initialViewMatrix) { this->onReset(&initialViewMa trix); } | 61 void reset(const SkMatrix& initialViewMatrix) { this->onReset(&initialViewMa trix); } |
74 | 62 |
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144 return -1 != fFixedFunctionVertexAttribIndices[kCoverage_GrVertexAttribB inding]; | 132 return -1 != fFixedFunctionVertexAttribIndices[kCoverage_GrVertexAttribB inding]; |
145 } | 133 } |
146 | 134 |
147 bool validateVertexAttribs() const; | 135 bool validateVertexAttribs() const; |
148 | 136 |
149 /** | 137 /** |
150 * Helper to save/restore vertex attribs | 138 * Helper to save/restore vertex attribs |
151 */ | 139 */ |
152 class AutoVertexAttribRestore { | 140 class AutoVertexAttribRestore { |
153 public: | 141 public: |
154 AutoVertexAttribRestore(GrDrawState* drawState) { | 142 AutoVertexAttribRestore(GrDrawState* drawState); |
155 SkASSERT(NULL != drawState); | |
156 fDrawState = drawState; | |
157 fVAPtr = drawState->fVAPtr; | |
158 fVACount = drawState->fVACount; | |
159 fDrawState->setDefaultVertexAttribs(); | |
160 } | |
161 | 143 |
162 ~AutoVertexAttribRestore(){ | 144 ~AutoVertexAttribRestore() { fDrawState->setVertexAttribs(fVAPtr, fVACo unt); } |
163 fDrawState->setVertexAttribs(fVAPtr, fVACount); | |
164 } | |
165 | 145 |
166 private: | 146 private: |
167 GrDrawState* fDrawState; | 147 GrDrawState* fDrawState; |
168 const GrVertexAttrib* fVAPtr; | 148 const GrVertexAttrib* fVAPtr; |
169 int fVACount; | 149 int fVACount; |
170 }; | 150 }; |
171 | 151 |
172 /** | |
bsalomon
2014/08/04 21:05:46
These aren't used anywhere anymore.
| |
173 * Accessing positions, local coords, or colors, of a vertex within an array is a hassle | |
174 * involving casts and simple math. These helpers exist to keep GrDrawTarget clients' code a bit | |
175 * nicer looking. | |
176 */ | |
177 | |
178 /** | |
179 * Gets a pointer to a GrPoint of a vertex's position or texture | |
180 * coordinate. | |
181 * @param vertices the vertex array | |
182 * @param vertexIndex the index of the vertex in the array | |
183 * @param vertexSize the size of each vertex in the array | |
184 * @param offset the offset in bytes of the vertex component. | |
185 * Defaults to zero (corresponding to vertex position) | |
186 * @return pointer to the vertex component as a GrPoint | |
187 */ | |
188 static SkPoint* GetVertexPoint(void* vertices, | |
189 int vertexIndex, | |
190 int vertexSize, | |
191 int offset = 0) { | |
192 intptr_t start = GrTCast<intptr_t>(vertices); | |
193 return GrTCast<SkPoint*>(start + offset + | |
194 vertexIndex * vertexSize); | |
195 } | |
196 static const SkPoint* GetVertexPoint(const void* vertices, | |
197 int vertexIndex, | |
198 int vertexSize, | |
199 int offset = 0) { | |
200 intptr_t start = GrTCast<intptr_t>(vertices); | |
201 return GrTCast<const SkPoint*>(start + offset + | |
202 vertexIndex * vertexSize); | |
203 } | |
204 | |
205 /** | |
206 * Gets a pointer to a GrColor inside a vertex within a vertex array. | |
207 * @param vertices the vetex array | |
208 * @param vertexIndex the index of the vertex in the array | |
209 * @param vertexSize the size of each vertex in the array | |
210 * @param offset the offset in bytes of the vertex color | |
211 * @return pointer to the vertex component as a GrColor | |
212 */ | |
213 static GrColor* GetVertexColor(void* vertices, | |
214 int vertexIndex, | |
215 int vertexSize, | |
216 int offset) { | |
217 intptr_t start = GrTCast<intptr_t>(vertices); | |
218 return GrTCast<GrColor*>(start + offset + | |
219 vertexIndex * vertexSize); | |
220 } | |
221 static const GrColor* GetVertexColor(const void* vertices, | |
222 int vertexIndex, | |
223 int vertexSize, | |
224 int offset) { | |
225 const intptr_t start = GrTCast<intptr_t>(vertices); | |
226 return GrTCast<const GrColor*>(start + offset + | |
227 vertexIndex * vertexSize); | |
228 } | |
229 | |
230 /// @} | 152 /// @} |
231 | 153 |
232 /** | 154 /** |
233 * Determines whether src alpha is guaranteed to be one for all src pixels | 155 * Determines whether src alpha is guaranteed to be one for all src pixels |
234 */ | 156 */ |
235 bool srcAlphaWillBeOne() const; | 157 bool srcAlphaWillBeOne() const; |
236 | 158 |
237 /** | 159 /** |
238 * Determines whether the output coverage is guaranteed to be one for all pi xels hit by a draw. | 160 * Determines whether the output coverage is guaranteed to be one for all pi xels hit by a draw. |
239 */ | 161 */ |
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389 class AutoRestoreEffects : public ::SkNoncopyable { | 311 class AutoRestoreEffects : public ::SkNoncopyable { |
390 public: | 312 public: |
391 AutoRestoreEffects() : fDrawState(NULL), fColorEffectCnt(0), fCoverageEf fectCnt(0) {} | 313 AutoRestoreEffects() : fDrawState(NULL), fColorEffectCnt(0), fCoverageEf fectCnt(0) {} |
392 | 314 |
393 AutoRestoreEffects(GrDrawState* ds) : fDrawState(NULL), fColorEffectCnt( 0), fCoverageEffectCnt(0) { | 315 AutoRestoreEffects(GrDrawState* ds) : fDrawState(NULL), fColorEffectCnt( 0), fCoverageEffectCnt(0) { |
394 this->set(ds); | 316 this->set(ds); |
395 } | 317 } |
396 | 318 |
397 ~AutoRestoreEffects() { this->set(NULL); } | 319 ~AutoRestoreEffects() { this->set(NULL); } |
398 | 320 |
399 void set(GrDrawState* ds) { | 321 void set(GrDrawState* ds); |
400 if (NULL != fDrawState) { | |
401 int m = fDrawState->fColorStages.count() - fColorEffectCnt; | |
402 SkASSERT(m >= 0); | |
403 fDrawState->fColorStages.pop_back_n(m); | |
404 | |
405 int n = fDrawState->fCoverageStages.count() - fCoverageEffectCnt ; | |
406 SkASSERT(n >= 0); | |
407 fDrawState->fCoverageStages.pop_back_n(n); | |
408 if (m + n > 0) { | |
409 fDrawState->invalidateBlendOptFlags(); | |
410 } | |
411 SkDEBUGCODE(--fDrawState->fBlockEffectRemovalCnt;) | |
412 } | |
413 fDrawState = ds; | |
414 if (NULL != ds) { | |
415 fColorEffectCnt = ds->fColorStages.count(); | |
416 fCoverageEffectCnt = ds->fCoverageStages.count(); | |
417 SkDEBUGCODE(++ds->fBlockEffectRemovalCnt;) | |
418 } | |
419 } | |
420 | 322 |
421 bool isSet() const { return NULL != fDrawState; } | 323 bool isSet() const { return NULL != fDrawState; } |
422 | 324 |
423 private: | 325 private: |
424 GrDrawState* fDrawState; | 326 GrDrawState* fDrawState; |
425 int fColorEffectCnt; | 327 int fColorEffectCnt; |
426 int fCoverageEffectCnt; | 328 int fCoverageEffectCnt; |
427 }; | 329 }; |
428 | 330 |
429 int numColorStages() const { return fColorStages.count(); } | 331 int numColorStages() const { return fColorStages.count(); } |
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885 /** Use the first draw state. */ | 787 /** Use the first draw state. */ |
886 kA_CombinedState, | 788 kA_CombinedState, |
887 /** Use the second draw state. */ | 789 /** Use the second draw state. */ |
888 kB_CombinedState, | 790 kB_CombinedState, |
889 }; | 791 }; |
890 | 792 |
891 /** This functions determines whether the GrDrawStates used for two draws ca n be combined into | 793 /** This functions determines whether the GrDrawStates used for two draws ca n be combined into |
892 a single GrDrawState. This is used to avoid storing redundant GrDrawStat es and to determine | 794 a single GrDrawState. This is used to avoid storing redundant GrDrawStat es and to determine |
893 if draws can be batched. The return value indicates whether combining is possible and, if so, | 795 if draws can be batched. The return value indicates whether combining is possible and, if so, |
894 which of the two inputs should be used. */ | 796 which of the two inputs should be used. */ |
895 static CombinedState CombineIfPossible(const GrDrawState& a, const GrDrawSta te& b) { | 797 static CombinedState CombineIfPossible(const GrDrawState& a, const GrDrawSta te& b); |
896 bool usingVertexColors = a.hasColorVertexAttribute(); | |
897 if (!usingVertexColors && a.fColor != b.fColor) { | |
898 return kIncompatible_CombinedState; | |
899 } | |
900 | 798 |
901 if (a.fRenderTarget.get() != b.fRenderTarget.get() || | 799 GrDrawState& operator= (const GrDrawState& that); |
902 a.fColorStages.count() != b.fColorStages.count() || | |
903 a.fCoverageStages.count() != b.fCoverageStages.count() || | |
904 !a.fViewMatrix.cheapEqualTo(b.fViewMatrix) || | |
905 a.fSrcBlend != b.fSrcBlend || | |
906 a.fDstBlend != b.fDstBlend || | |
907 a.fBlendConstant != b.fBlendConstant || | |
908 a.fFlagBits != b.fFlagBits || | |
909 a.fVACount != b.fVACount || | |
910 memcmp(a.fVAPtr, b.fVAPtr, a.fVACount * sizeof(GrVertexAttrib)) || | |
911 a.fStencilSettings != b.fStencilSettings || | |
912 a.fDrawFace != b.fDrawFace) { | |
913 return kIncompatible_CombinedState; | |
914 } | |
915 | |
916 bool usingVertexCoverage = a.hasCoverageVertexAttribute(); | |
917 if (!usingVertexCoverage && a.fCoverage != b.fCoverage) { | |
918 return kIncompatible_CombinedState; | |
919 } | |
920 | |
921 bool explicitLocalCoords = a.hasLocalCoordAttribute(); | |
922 for (int i = 0; i < a.fColorStages.count(); i++) { | |
923 if (!GrEffectStage::AreCompatible(a.fColorStages[i], b.fColorStages[ i], | |
924 explicitLocalCoords)) { | |
925 return kIncompatible_CombinedState; | |
926 } | |
927 } | |
928 for (int i = 0; i < a.fCoverageStages.count(); i++) { | |
929 if (!GrEffectStage::AreCompatible(a.fCoverageStages[i], b.fCoverageS tages[i], | |
930 explicitLocalCoords)) { | |
931 return kIncompatible_CombinedState; | |
932 } | |
933 } | |
934 SkASSERT(0 == memcmp(a.fFixedFunctionVertexAttribIndices, | |
935 b.fFixedFunctionVertexAttribIndices, | |
936 sizeof(a.fFixedFunctionVertexAttribIndices))); | |
937 return kAOrB_CombinedState; | |
938 } | |
939 | |
940 GrDrawState& operator= (const GrDrawState& that) { | |
941 SkASSERT(0 == fBlockEffectRemovalCnt || 0 == this->numTotalStages()); | |
942 this->setRenderTarget(that.fRenderTarget.get()); | |
943 fColor = that.fColor; | |
944 fViewMatrix = that.fViewMatrix; | |
945 fSrcBlend = that.fSrcBlend; | |
946 fDstBlend = that.fDstBlend; | |
947 fBlendConstant = that.fBlendConstant; | |
948 fFlagBits = that.fFlagBits; | |
949 fVACount = that.fVACount; | |
950 fVAPtr = that.fVAPtr; | |
951 fStencilSettings = that.fStencilSettings; | |
952 fCoverage = that.fCoverage; | |
953 fDrawFace = that.fDrawFace; | |
954 fColorStages = that.fColorStages; | |
955 fCoverageStages = that.fCoverageStages; | |
956 fOptSrcBlend = that.fOptSrcBlend; | |
957 fOptDstBlend = that.fOptDstBlend; | |
958 fBlendOptFlags = that.fBlendOptFlags; | |
959 | |
960 memcpy(fFixedFunctionVertexAttribIndices, | |
961 that.fFixedFunctionVertexAttribIndices, | |
962 sizeof(fFixedFunctionVertexAttribIndices)); | |
963 return *this; | |
964 } | |
965 | 800 |
966 private: | 801 private: |
967 | 802 |
968 void onReset(const SkMatrix* initialViewMatrix) { | 803 void onReset(const SkMatrix* initialViewMatrix); |
969 SkASSERT(0 == fBlockEffectRemovalCnt || 0 == this->numTotalStages()); | |
970 fColorStages.reset(); | |
971 fCoverageStages.reset(); | |
972 | |
973 fRenderTarget.reset(NULL); | |
974 | |
975 this->setDefaultVertexAttribs(); | |
976 | |
977 fColor = 0xffffffff; | |
978 if (NULL == initialViewMatrix) { | |
979 fViewMatrix.reset(); | |
980 } else { | |
981 fViewMatrix = *initialViewMatrix; | |
982 } | |
983 fSrcBlend = kOne_GrBlendCoeff; | |
984 fDstBlend = kZero_GrBlendCoeff; | |
985 fBlendConstant = 0x0; | |
986 fFlagBits = 0x0; | |
987 fStencilSettings.setDisabled(); | |
988 fCoverage = 0xffffffff; | |
989 fDrawFace = kBoth_DrawFace; | |
990 | |
991 this->invalidateBlendOptFlags(); | |
992 } | |
993 | 804 |
994 BlendOptFlags calcBlendOpts(bool forceCoverage = false, | 805 BlendOptFlags calcBlendOpts(bool forceCoverage = false, |
995 GrBlendCoeff* srcCoeff = NULL, | 806 GrBlendCoeff* srcCoeff = NULL, |
996 GrBlendCoeff* dstCoeff = NULL) const; | 807 GrBlendCoeff* dstCoeff = NULL) const; |
997 | 808 |
998 // These fields are roughly sorted by decreasing likelihood of being differe nt in op== | 809 // These fields are roughly sorted by decreasing likelihood of being differe nt in op== |
999 SkAutoTUnref<GrRenderTarget> fRenderTarget; | 810 SkAutoTUnref<GrRenderTarget> fRenderTarget; |
1000 GrColor fColor; | 811 GrColor fColor; |
1001 SkMatrix fViewMatrix; | 812 SkMatrix fViewMatrix; |
1002 GrBlendCoeff fSrcBlend; | 813 GrBlendCoeff fSrcBlend; |
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1032 * @param count the number of attributes being set, limited to kMaxVer texAttribCnt. | 843 * @param count the number of attributes being set, limited to kMaxVer texAttribCnt. |
1033 */ | 844 */ |
1034 void setVertexAttribs(const GrVertexAttrib attribs[], int count); | 845 void setVertexAttribs(const GrVertexAttrib attribs[], int count); |
1035 | 846 |
1036 typedef SkRefCnt INHERITED; | 847 typedef SkRefCnt INHERITED; |
1037 }; | 848 }; |
1038 | 849 |
1039 GR_MAKE_BITFIELD_OPS(GrDrawState::BlendOptFlags); | 850 GR_MAKE_BITFIELD_OPS(GrDrawState::BlendOptFlags); |
1040 | 851 |
1041 #endif | 852 #endif |
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