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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 GrGpu_DEFINED | 8 #ifndef GrGpu_DEFINED |
9 #define GrGpu_DEFINED | 9 #define GrGpu_DEFINED |
10 | 10 |
11 #include "GrDrawTarget.h" | 11 #include "GrDrawTarget.h" |
12 #include "GrClipMaskManager.h" | 12 #include "GrClipMaskManager.h" |
13 #include "GrPathRendering.h" | 13 #include "GrPathRendering.h" |
14 #include "GrProgramDesc.h" | 14 #include "GrProgramDesc.h" |
15 #include "SkPath.h" | 15 #include "SkPath.h" |
16 | 16 |
17 class GrContext; | 17 class GrContext; |
18 class GrIndexBufferAllocPool; | 18 class GrIndexBufferAllocPool; |
19 class GrPath; | 19 class GrPath; |
20 class GrPathRange; | 20 class GrPathRange; |
21 class GrPathRenderer; | 21 class GrPathRenderer; |
22 class GrPathRendererChain; | 22 class GrPathRendererChain; |
23 class GrStencilBuffer; | 23 class GrStencilBuffer; |
24 class GrVertexBufferAllocPool; | 24 class GrVertexBufferAllocPool; |
25 | 25 |
26 class GrGpu : public GrDrawTarget { | 26 class GrGpu : public GrClipTarget { |
27 public: | 27 public: |
28 | 28 |
29 /** | 29 /** |
30 * Additional blend coefficients for dual source blending, not exposed | 30 * Additional blend coefficients for dual source blending, not exposed |
31 * through GrPaint/GrContext. | 31 * through GrPaint/GrContext. |
32 */ | 32 */ |
33 enum ExtendedBlendCoeffs { | 33 enum ExtendedBlendCoeffs { |
34 // source 2 refers to second output color when | 34 // source 2 refers to second output color when |
35 // using dual source blending. | 35 // using dual source blending. |
36 kS2C_GrBlendCoeff = kPublicGrBlendCoeffCount, | 36 kS2C_GrBlendCoeff = kPublicGrBlendCoeffCount, |
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265 int left, int top, int width, int height, | 265 int left, int top, int width, int height, |
266 GrPixelConfig config, const void* buffer, | 266 GrPixelConfig config, const void* buffer, |
267 size_t rowBytes); | 267 size_t rowBytes); |
268 | 268 |
269 // GrDrawTarget overrides | 269 // GrDrawTarget overrides |
270 virtual void clear(const SkIRect* rect, | 270 virtual void clear(const SkIRect* rect, |
271 GrColor color, | 271 GrColor color, |
272 bool canIgnoreRect, | 272 bool canIgnoreRect, |
273 GrRenderTarget* renderTarget = NULL) SK_OVERRIDE; | 273 GrRenderTarget* renderTarget = NULL) SK_OVERRIDE; |
274 | 274 |
| 275 virtual void clearStencilClip(const SkIRect& rect, |
| 276 bool insideClip, |
| 277 GrRenderTarget* renderTarget = NULL) SK_OVERRI
DE; |
| 278 |
275 virtual void purgeResources() SK_OVERRIDE { | 279 virtual void purgeResources() SK_OVERRIDE { |
276 // The clip mask manager can rebuild all its clip masks so just | 280 // The clip mask manager can rebuild all its clip masks so just |
277 // get rid of them all. | 281 // get rid of them all. |
278 fClipMaskManager.purgeResources(); | 282 fClipMaskManager.purgeResources(); |
279 } | 283 } |
280 | 284 |
281 // After the client interacts directly with the 3D context state the GrGpu | 285 // After the client interacts directly with the 3D context state the GrGpu |
282 // must resync its internal state and assumptions about 3D context state. | 286 // must resync its internal state and assumptions about 3D context state. |
283 // Each time this occurs the GrGpu bumps a timestamp. | 287 // Each time this occurs the GrGpu bumps a timestamp. |
284 // state of the 3D context | 288 // state of the 3D context |
285 // At 10 resets / frame and 60fps a 64bit timestamp will overflow in about | 289 // At 10 resets / frame and 60fps a 64bit timestamp will overflow in about |
286 // a billion years. | 290 // a billion years. |
287 typedef uint64_t ResetTimestamp; | 291 typedef uint64_t ResetTimestamp; |
288 | 292 |
289 // This timestamp is always older than the current timestamp | 293 // This timestamp is always older than the current timestamp |
290 static const ResetTimestamp kExpiredTimestamp = 0; | 294 static const ResetTimestamp kExpiredTimestamp = 0; |
291 // Returns a timestamp based on the number of times the context was reset. | 295 // Returns a timestamp based on the number of times the context was reset. |
292 // This timestamp can be used to lazily detect when cached 3D context state | 296 // This timestamp can be used to lazily detect when cached 3D context state |
293 // is dirty. | 297 // is dirty. |
294 ResetTimestamp getResetTimestamp() const { | 298 ResetTimestamp getResetTimestamp() const { |
295 return fResetTimestamp; | 299 return fResetTimestamp; |
296 } | 300 } |
297 | 301 |
298 // GrGpu subclass sets clip bit in the stencil buffer. The subclass is | |
299 // free to clear the remaining bits to zero if masked clears are more | |
300 // expensive than clearing all bits. | |
301 virtual void clearStencilClip(GrRenderTarget*, const SkIRect& rect, bool ins
ideClip) = 0; | |
302 | |
303 enum PrivateDrawStateStateBits { | 302 enum PrivateDrawStateStateBits { |
304 kFirstBit = (GrDrawState::kLastPublicStateBit << 1), | 303 kFirstBit = (GrDrawState::kLastPublicStateBit << 1), |
305 | 304 |
306 kModifyStencilClip_StateBit = kFirstBit, // allows draws to modify | 305 kModifyStencilClip_StateBit = kFirstBit, // allows draws to modify |
307 // stencil bits used for | 306 // stencil bits used for |
308 // clipping. | 307 // clipping. |
309 }; | 308 }; |
310 | 309 |
311 void getPathStencilSettingsForFillType(SkPath::FillType fill, GrStencilSetti
ngs* outStencilSettings); | 310 void getPathStencilSettingsForFillType(SkPath::FillType fill, GrStencilSetti
ngs* outStencilSettings); |
312 | 311 |
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415 virtual GrRenderTarget* onWrapBackendRenderTarget(const GrBackendRenderTarge
tDesc&) = 0; | 414 virtual GrRenderTarget* onWrapBackendRenderTarget(const GrBackendRenderTarge
tDesc&) = 0; |
416 virtual GrVertexBuffer* onCreateVertexBuffer(size_t size, bool dynamic) = 0; | 415 virtual GrVertexBuffer* onCreateVertexBuffer(size_t size, bool dynamic) = 0; |
417 virtual GrIndexBuffer* onCreateIndexBuffer(size_t size, bool dynamic) = 0; | 416 virtual GrIndexBuffer* onCreateIndexBuffer(size_t size, bool dynamic) = 0; |
418 | 417 |
419 // overridden by backend-specific derived class to perform the clear and | 418 // overridden by backend-specific derived class to perform the clear and |
420 // clearRect. NULL rect means clear whole target. If canIgnoreRect is | 419 // clearRect. NULL rect means clear whole target. If canIgnoreRect is |
421 // true, it is okay to perform a full clear instead of a partial clear | 420 // true, it is okay to perform a full clear instead of a partial clear |
422 virtual void onClear(GrRenderTarget*, const SkIRect* rect, GrColor color, | 421 virtual void onClear(GrRenderTarget*, const SkIRect* rect, GrColor color, |
423 bool canIgnoreRect) = 0; | 422 bool canIgnoreRect) = 0; |
424 | 423 |
| 424 |
| 425 // Overridden by backend specific classes to perform a clear of the stencil
clip bits. This is |
| 426 // ONLY used by the the clip target |
| 427 virtual void onClearStencilClip(GrRenderTarget*, |
| 428 const SkIRect& rect, |
| 429 bool insideClip) = 0; |
| 430 |
425 // overridden by backend-specific derived class to perform the draw call. | 431 // overridden by backend-specific derived class to perform the draw call. |
426 virtual void onGpuDraw(const DrawInfo&) = 0; | 432 virtual void onGpuDraw(const DrawInfo&) = 0; |
427 | 433 |
428 // overridden by backend-specific derived class to perform the read pixels. | 434 // overridden by backend-specific derived class to perform the read pixels. |
429 virtual bool onReadPixels(GrRenderTarget* target, | 435 virtual bool onReadPixels(GrRenderTarget* target, |
430 int left, int top, int width, int height, | 436 int left, int top, int width, int height, |
431 GrPixelConfig, | 437 GrPixelConfig, |
432 void* buffer, | 438 void* buffer, |
433 size_t rowBytes) = 0; | 439 size_t rowBytes) = 0; |
434 | 440 |
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447 virtual bool createStencilBufferForRenderTarget(GrRenderTarget*, int width,
int height) = 0; | 453 virtual bool createStencilBufferForRenderTarget(GrRenderTarget*, int width,
int height) = 0; |
448 | 454 |
449 // attaches an existing SB to an existing RT. | 455 // attaches an existing SB to an existing RT. |
450 virtual bool attachStencilBufferToRenderTarget(GrStencilBuffer*, GrRenderTar
get*) = 0; | 456 virtual bool attachStencilBufferToRenderTarget(GrStencilBuffer*, GrRenderTar
get*) = 0; |
451 | 457 |
452 // The GrGpu typically records the clients requested state and then flushes | 458 // The GrGpu typically records the clients requested state and then flushes |
453 // deltas from previous state at draw time. This function does the | 459 // deltas from previous state at draw time. This function does the |
454 // backend-specific flush of the state. | 460 // backend-specific flush of the state. |
455 // returns false if current state is unsupported. | 461 // returns false if current state is unsupported. |
456 virtual bool flushGraphicsState(DrawType, | 462 virtual bool flushGraphicsState(DrawType, |
457 const ScissorState&, | 463 const GrClipMaskManager::ScissorState&, |
458 const GrDeviceCoordTexture* dstCopy) = 0; | 464 const GrDeviceCoordTexture* dstCopy) = 0; |
459 | 465 |
460 // clears target's entire stencil buffer to 0 | 466 // clears target's entire stencil buffer to 0 |
461 virtual void clearStencil(GrRenderTarget* target) = 0; | 467 virtual void clearStencil(GrRenderTarget* target) = 0; |
462 | 468 |
463 // Given a rt, find or create a stencil buffer and attach it | 469 // Given a rt, find or create a stencil buffer and attach it |
464 bool attachStencilBufferToRenderTarget(GrRenderTarget* target); | 470 bool attachStencilBufferToRenderTarget(GrRenderTarget* target); |
465 | 471 |
466 // GrDrawTarget overrides | 472 // GrDrawTarget overrides |
467 virtual void onDraw(const DrawInfo&) SK_OVERRIDE; | 473 virtual void onDraw(const DrawInfo&) SK_OVERRIDE; |
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500 ResetTimestamp fResetTi
mestamp; | 506 ResetTimestamp fResetTi
mestamp; |
501 uint32_t fResetBi
ts; | 507 uint32_t fResetBi
ts; |
502 GrVertexBufferAllocPool* fVertexP
ool; | 508 GrVertexBufferAllocPool* fVertexP
ool; |
503 GrIndexBufferAllocPool* fIndexPo
ol; | 509 GrIndexBufferAllocPool* fIndexPo
ol; |
504 // counts number of uses of vertex/index pool in the geometry stack | 510 // counts number of uses of vertex/index pool in the geometry stack |
505 int fVertexP
oolUseCnt; | 511 int fVertexP
oolUseCnt; |
506 int fIndexPo
olUseCnt; | 512 int fIndexPo
olUseCnt; |
507 // these are mutable so they can be created on-demand | 513 // these are mutable so they can be created on-demand |
508 mutable GrIndexBuffer* fQuadInd
exBuffer; | 514 mutable GrIndexBuffer* fQuadInd
exBuffer; |
509 | 515 |
510 typedef GrDrawTarget INHERITED; | 516 typedef GrClipTarget INHERITED; |
511 }; | 517 }; |
512 | 518 |
513 #endif | 519 #endif |
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