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Side by Side Diff: include/gpu/GrXferProcessor.h

Issue 1133123009: rename GrDrawTargetCaps to GrCaps (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: fix gypi filename Created 5 years, 7 months ago
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1 /* 1 /*
2 * Copyright 2014 Google Inc. 2 * Copyright 2014 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 GrXferProcessor_DEFINED 8 #ifndef GrXferProcessor_DEFINED
9 #define GrXferProcessor_DEFINED 9 #define GrXferProcessor_DEFINED
10 10
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160 * its state to reflected the given blend optimizations. If the XP needs to see a specific input 160 * its state to reflected the given blend optimizations. If the XP needs to see a specific input
161 * color to blend correctly, it will set the OverrideColor flag and the outp ut parameter 161 * color to blend correctly, it will set the OverrideColor flag and the outp ut parameter
162 * overrideColor will be the required value that should be passed into the X P. 162 * overrideColor will be the required value that should be passed into the X P.
163 * A caller who calls this function on a XP is required to honor the returne d OptFlags 163 * A caller who calls this function on a XP is required to honor the returne d OptFlags
164 * and color values for its draw. 164 * and color values for its draw.
165 */ 165 */
166 OptFlags getOptimizations(const GrProcOptInfo& colorPOI, 166 OptFlags getOptimizations(const GrProcOptInfo& colorPOI,
167 const GrProcOptInfo& coveragePOI, 167 const GrProcOptInfo& coveragePOI,
168 bool doesStencilWrite, 168 bool doesStencilWrite,
169 GrColor* overrideColor, 169 GrColor* overrideColor,
170 const GrDrawTargetCaps& caps); 170 const GrCaps& caps);
171 171
172 /** 172 /**
173 * Returns whether this XP will require an Xfer barrier on the given rt. If true, outBarrierType 173 * Returns whether this XP will require an Xfer barrier on the given rt. If true, outBarrierType
174 * is updated to contain the type of barrier needed. 174 * is updated to contain the type of barrier needed.
175 */ 175 */
176 bool willNeedXferBarrier(const GrRenderTarget* rt, 176 bool willNeedXferBarrier(const GrRenderTarget* rt,
177 const GrDrawTargetCaps& caps, 177 const GrCaps& caps,
178 GrXferBarrierType* outBarrierType) const; 178 GrXferBarrierType* outBarrierType) const;
179 179
180 struct BlendInfo { 180 struct BlendInfo {
181 void reset() { 181 void reset() {
182 fEquation = kAdd_GrBlendEquation; 182 fEquation = kAdd_GrBlendEquation;
183 fSrcBlend = kOne_GrBlendCoeff; 183 fSrcBlend = kOne_GrBlendCoeff;
184 fDstBlend = kZero_GrBlendCoeff; 184 fDstBlend = kZero_GrBlendCoeff;
185 fBlendConstant = 0; 185 fBlendConstant = 0;
186 fWriteColor = true; 186 fWriteColor = true;
187 } 187 }
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257 257
258 protected: 258 protected:
259 GrXferProcessor(); 259 GrXferProcessor();
260 GrXferProcessor(const GrDeviceCoordTexture* dstCopy, bool willReadDstColor); 260 GrXferProcessor(const GrDeviceCoordTexture* dstCopy, bool willReadDstColor);
261 261
262 private: 262 private:
263 virtual OptFlags onGetOptimizations(const GrProcOptInfo& colorPOI, 263 virtual OptFlags onGetOptimizations(const GrProcOptInfo& colorPOI,
264 const GrProcOptInfo& coveragePOI, 264 const GrProcOptInfo& coveragePOI,
265 bool doesStencilWrite, 265 bool doesStencilWrite,
266 GrColor* overrideColor, 266 GrColor* overrideColor,
267 const GrDrawTargetCaps& caps) = 0; 267 const GrCaps& caps) = 0;
268 268
269 /** 269 /**
270 * Sets a unique key on the GrProcessorKeyBuilder that is directly associate d with this xfer 270 * Sets a unique key on the GrProcessorKeyBuilder that is directly associate d with this xfer
271 * processor's GL backend implementation. 271 * processor's GL backend implementation.
272 */ 272 */
273 virtual void onGetGLProcessorKey(const GrGLSLCaps& caps, 273 virtual void onGetGLProcessorKey(const GrGLSLCaps& caps,
274 GrProcessorKeyBuilder* b) const = 0; 274 GrProcessorKeyBuilder* b) const = 0;
275 275
276 /** 276 /**
277 * If not using a texture barrier, retrieves whether the subclass will requi re a different type 277 * If not using a texture barrier, retrieves whether the subclass will requi re a different type
278 * of barrier. 278 * of barrier.
279 */ 279 */
280 virtual bool onWillNeedXferBarrier(const GrRenderTarget*, 280 virtual bool onWillNeedXferBarrier(const GrRenderTarget*,
281 const GrDrawTargetCaps&, 281 const GrCaps&,
282 GrXferBarrierType* outBarrierType SK_UNUS ED) const { 282 GrXferBarrierType* outBarrierType SK_UNUS ED) const {
283 return false; 283 return false;
284 } 284 }
285 285
286 /** 286 /**
287 * Retrieves the hardware blend state required by this Xfer processor. The B lendInfo struct 287 * Retrieves the hardware blend state required by this Xfer processor. The B lendInfo struct
288 * comes initialized to default values, so the Xfer processor only needs to set the state it 288 * comes initialized to default values, so the Xfer processor only needs to set the state it
289 * needs. It may not even need to override this method at all. 289 * needs. It may not even need to override this method at all.
290 */ 290 */
291 virtual void onGetBlendInfo(BlendInfo*) const {} 291 virtual void onGetBlendInfo(BlendInfo*) const {}
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313 * 313 *
314 * Before the XP is created, the XPF is able to answer queries about what functi onality the XPs it 314 * Before the XP is created, the XPF is able to answer queries about what functi onality the XPs it
315 * creates will have. For example, can it create an XP that supports RGB coverag e or will the XP 315 * creates will have. For example, can it create an XP that supports RGB coverag e or will the XP
316 * blend with the destination color. 316 * blend with the destination color.
317 */ 317 */
318 class GrXPFactory : public SkRefCnt { 318 class GrXPFactory : public SkRefCnt {
319 public: 319 public:
320 GrXferProcessor* createXferProcessor(const GrProcOptInfo& colorPOI, 320 GrXferProcessor* createXferProcessor(const GrProcOptInfo& colorPOI,
321 const GrProcOptInfo& coveragePOI, 321 const GrProcOptInfo& coveragePOI,
322 const GrDeviceCoordTexture* dstCopy, 322 const GrDeviceCoordTexture* dstCopy,
323 const GrDrawTargetCaps& caps) const; 323 const GrCaps& caps) const;
324 324
325 /** 325 /**
326 * This function returns true if the GrXferProcessor generated from this fac tory will be able to 326 * This function returns true if the GrXferProcessor generated from this fac tory will be able to
327 * correctly blend when using RGB coverage. The knownColor and knownColorFla gs represent the 327 * correctly blend when using RGB coverage. The knownColor and knownColorFla gs represent the
328 * final computed color from the color stages. 328 * final computed color from the color stages.
329 */ 329 */
330 virtual bool supportsRGBCoverage(GrColor knownColor, uint32_t knownColorFlag s) const = 0; 330 virtual bool supportsRGBCoverage(GrColor knownColor, uint32_t knownColorFlag s) const = 0;
331 331
332 struct InvariantOutput { 332 struct InvariantOutput {
333 bool fWillBlendWithDst; 333 bool fWillBlendWithDst;
334 GrColor fBlendedColor; 334 GrColor fBlendedColor;
335 uint32_t fBlendedColorFlags; 335 uint32_t fBlendedColorFlags;
336 }; 336 };
337 337
338 /** 338 /**
339 * This function returns known information about the output of the xfer proc essor produced by 339 * This function returns known information about the output of the xfer proc essor produced by
340 * this xp factory. The invariant color information returned by this functio n refers to the 340 * this xp factory. The invariant color information returned by this functio n refers to the
341 * final color produced after all blending. 341 * final color produced after all blending.
342 */ 342 */
343 virtual void getInvariantOutput(const GrProcOptInfo& colorPOI, const GrProcO ptInfo& coveragePOI, 343 virtual void getInvariantOutput(const GrProcOptInfo& colorPOI, const GrProcO ptInfo& coveragePOI,
344 InvariantOutput*) const = 0; 344 InvariantOutput*) const = 0;
345 345
346 bool willNeedDstCopy(const GrDrawTargetCaps& caps, const GrProcOptInfo& colo rPOI, 346 bool willNeedDstCopy(const GrCaps& caps, const GrProcOptInfo& colorPOI,
347 const GrProcOptInfo& coveragePOI) const; 347 const GrProcOptInfo& coveragePOI) const;
348 348
349 bool isEqual(const GrXPFactory& that) const { 349 bool isEqual(const GrXPFactory& that) const {
350 if (this->classID() != that.classID()) { 350 if (this->classID() != that.classID()) {
351 return false; 351 return false;
352 } 352 }
353 return this->onIsEqual(that); 353 return this->onIsEqual(that);
354 } 354 }
355 355
356 /** 356 /**
357 * Helper for down-casting to a GrXPFactory subclass 357 * Helper for down-casting to a GrXPFactory subclass
358 */ 358 */
359 template <typename T> const T& cast() const { return *static_cast<const T*>( this); } 359 template <typename T> const T& cast() const { return *static_cast<const T*>( this); }
360 360
361 uint32_t classID() const { SkASSERT(kIllegalXPFClassID != fClassID); return fClassID; } 361 uint32_t classID() const { SkASSERT(kIllegalXPFClassID != fClassID); return fClassID; }
362 362
363 protected: 363 protected:
364 GrXPFactory() : fClassID(kIllegalXPFClassID) {} 364 GrXPFactory() : fClassID(kIllegalXPFClassID) {}
365 365
366 template <typename XPF_SUBCLASS> void initClassID() { 366 template <typename XPF_SUBCLASS> void initClassID() {
367 static uint32_t kClassID = GenClassID(); 367 static uint32_t kClassID = GenClassID();
368 fClassID = kClassID; 368 fClassID = kClassID;
369 } 369 }
370 370
371 uint32_t fClassID; 371 uint32_t fClassID;
372 372
373 private: 373 private:
374 virtual GrXferProcessor* onCreateXferProcessor(const GrDrawTargetCaps& caps, 374 virtual GrXferProcessor* onCreateXferProcessor(const GrCaps& caps,
375 const GrProcOptInfo& colorPOI , 375 const GrProcOptInfo& colorPOI ,
376 const GrProcOptInfo& coverage POI, 376 const GrProcOptInfo& coverage POI,
377 const GrDeviceCoordTexture* d stCopy) const = 0; 377 const GrDeviceCoordTexture* d stCopy) const = 0;
378 /** 378 /**
379 * Returns true if the XP generated by this factory will explicitly read ds t in the fragment 379 * Returns true if the XP generated by this factory will explicitly read ds t in the fragment
380 * shader. 380 * shader.
381 */ 381 */
382 virtual bool willReadDstColor(const GrDrawTargetCaps& caps, 382 virtual bool willReadDstColor(const GrCaps& caps,
383 const GrProcOptInfo& colorPOI, 383 const GrProcOptInfo& colorPOI,
384 const GrProcOptInfo& coveragePOI) const = 0; 384 const GrProcOptInfo& coveragePOI) const = 0;
385 385
386 virtual bool onIsEqual(const GrXPFactory&) const = 0; 386 virtual bool onIsEqual(const GrXPFactory&) const = 0;
387 387
388 static uint32_t GenClassID() { 388 static uint32_t GenClassID() {
389 // fCurrXPFactoryID has been initialized to kIllegalXPFactoryID. The 389 // fCurrXPFactoryID has been initialized to kIllegalXPFactoryID. The
390 // atomic inc returns the old value not the incremented value. So we add 390 // atomic inc returns the old value not the incremented value. So we add
391 // 1 to the returned value. 391 // 1 to the returned value.
392 uint32_t id = static_cast<uint32_t>(sk_atomic_inc(&gCurrXPFClassID)) + 1 ; 392 uint32_t id = static_cast<uint32_t>(sk_atomic_inc(&gCurrXPFClassID)) + 1 ;
393 if (!id) { 393 if (!id) {
394 SkFAIL("This should never wrap as it should only be called once for each GrXPFactory " 394 SkFAIL("This should never wrap as it should only be called once for each GrXPFactory "
395 "subclass."); 395 "subclass.");
396 } 396 }
397 return id; 397 return id;
398 } 398 }
399 399
400 enum { 400 enum {
401 kIllegalXPFClassID = 0, 401 kIllegalXPFClassID = 0,
402 }; 402 };
403 static int32_t gCurrXPFClassID; 403 static int32_t gCurrXPFClassID;
404 404
405 typedef GrProgramElement INHERITED; 405 typedef GrProgramElement INHERITED;
406 }; 406 };
407 407
408 #endif 408 #endif
409 409
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