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| 1 /* | 1 /* |
| 2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 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 GrGeometryProcessor_DEFINED | 8 #ifndef GrGeometryProcessor_DEFINED |
| 9 #define GrGeometryProcessor_DEFINED | 9 #define GrGeometryProcessor_DEFINED |
| 10 | 10 |
| 11 #include "GrColor.h" | 11 #include "GrColor.h" |
| 12 #include "GrGeometryData.h" |
| 12 #include "GrProcessor.h" | 13 #include "GrProcessor.h" |
| 13 #include "GrShaderVar.h" | 14 #include "GrShaderVar.h" |
| 14 | 15 |
| 15 /* | 16 /* |
| 16 * The GrPrimitiveProcessor represents some kind of geometric primitive. This i
ncludes the shape | 17 * The GrPrimitiveProcessor represents some kind of geometric primitive. This i
ncludes the shape |
| 17 * of the primitive and the inherent color of the primitive. The GrPrimitivePro
cessor is | 18 * of the primitive and the inherent color of the primitive. The GrPrimitivePro
cessor is |
| 18 * responsible for providing a color and coverage input into the Ganesh renderin
g pipeline. Through | 19 * responsible for providing a color and coverage input into the Ganesh renderin
g pipeline. Through |
| 19 * optimization, Ganesh may decide a different color, no color, and / or no cove
rage are required | 20 * optimization, Ganesh may decide a different color, no color, and / or no cove
rage are required |
| 20 * from the GrPrimitiveProcessor, so the GrPrimitiveProcessor must be able to su
pport this | 21 * from the GrPrimitiveProcessor, so the GrPrimitiveProcessor must be able to su
pport this |
| 21 * functionality. We also use the GrPrimitiveProcessor to make batching decisio
ns. | 22 * functionality. We also use the GrPrimitiveProcessor to make batching decisio
ns. |
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| 38 * it draws. Each primitive draw will bundle all required data to perform the d
raw, and these | 39 * it draws. Each primitive draw will bundle all required data to perform the d
raw, and these |
| 39 * bundles of data will be owned by an instance of the associated GrPrimitivePro
cessor. Bundles | 40 * bundles of data will be owned by an instance of the associated GrPrimitivePro
cessor. Bundles |
| 40 * can be updated alongside the GrBatchTracker struct itself, ultimately allowin
g the | 41 * can be updated alongside the GrBatchTracker struct itself, ultimately allowin
g the |
| 41 * GrPrimitiveProcessor complete control of how it gets data into the fragment s
hader as long as | 42 * GrPrimitiveProcessor complete control of how it gets data into the fragment s
hader as long as |
| 42 * it emits the appropriate color, or none at all, as directed. | 43 * it emits the appropriate color, or none at all, as directed. |
| 43 */ | 44 */ |
| 44 | 45 |
| 45 /* | 46 /* |
| 46 * A struct for tracking batching decisions. While this lives on GrOptState, it
is managed | 47 * A struct for tracking batching decisions. While this lives on GrOptState, it
is managed |
| 47 * entirely by the derived classes of the GP. | 48 * entirely by the derived classes of the GP. |
| 48 * // TODO this was an early attempt at handling out of order batching. It shou
ld be | |
| 49 * used carefully as it is being replaced by GrBatch | |
| 50 */ | 49 */ |
| 51 class GrBatchTracker { | 50 class GrBatchTracker { |
| 52 public: | 51 public: |
| 53 template <typename T> const T& cast() const { | 52 template <typename T> const T& cast() const { |
| 54 SkASSERT(sizeof(T) <= kMaxSize); | 53 SkASSERT(sizeof(T) <= kMaxSize); |
| 55 return *reinterpret_cast<const T*>(fData.get()); | 54 return *reinterpret_cast<const T*>(fData.get()); |
| 56 } | 55 } |
| 57 | 56 |
| 58 template <typename T> T* cast() { | 57 template <typename T> T* cast() { |
| 59 SkASSERT(sizeof(T) <= kMaxSize); | 58 SkASSERT(sizeof(T) <= kMaxSize); |
| 60 return reinterpret_cast<T*>(fData.get()); | 59 return reinterpret_cast<T*>(fData.get()); |
| 61 } | 60 } |
| 62 | 61 |
| 63 static const size_t kMaxSize = 32; | 62 static const size_t kMaxSize = 32; |
| 64 | 63 |
| 65 private: | 64 private: |
| 66 SkAlignedSStorage<kMaxSize> fData; | 65 SkAlignedSStorage<kMaxSize> fData; |
| 67 }; | 66 }; |
| 68 | 67 |
| 69 class GrIndexBufferAllocPool; | |
| 70 class GrGLCaps; | 68 class GrGLCaps; |
| 71 class GrGLPrimitiveProcessor; | 69 class GrGLPrimitiveProcessor; |
| 72 class GrVertexBufferAllocPool; | 70 class GrOptDrawState; |
| 73 | 71 |
| 74 struct GrInitInvariantOutput; | 72 struct GrInitInvariantOutput; |
| 75 | 73 |
| 76 /* | |
| 77 * This struct allows the GrPipeline to communicate information about the pipeli
ne. Most of this | |
| 78 * is overrides, but some of it is general information. Logically it should liv
e in GrPipeline.h, | |
| 79 * but this is problematic due to circular dependencies. | |
| 80 */ | |
| 81 struct GrPipelineInfo { | |
| 82 bool fColorIgnored; | |
| 83 bool fCoverageIgnored; | |
| 84 GrColor fOverrideColor; | |
| 85 bool fUsesLocalCoords; | |
| 86 }; | |
| 87 | 74 |
| 88 /* | 75 /* |
| 89 * This enum is shared by GrPrimitiveProcessors and GrGLPrimitiveProcessors to c
oordinate shaders | 76 * This enum is shared by GrPrimitiveProcessors and GrGLPrimitiveProcessors to c
oordinate shaders |
| 90 * with vertex attributes / uniforms. | 77 * with vertex attributes / uniforms. |
| 91 */ | 78 */ |
| 92 enum GrGPInput { | 79 enum GrGPInput { |
| 93 kAllOnes_GrGPInput, | 80 kAllOnes_GrGPInput, |
| 94 kAttribute_GrGPInput, | 81 kAttribute_GrGPInput, |
| 95 kUniform_GrGPInput, | 82 kUniform_GrGPInput, |
| 96 kIgnored_GrGPInput, | 83 kIgnored_GrGPInput, |
| 97 }; | 84 }; |
| 98 | 85 |
| 99 /* | 86 /* |
| 100 * GrPrimitiveProcessor defines an interface which all subclasses must implement
. All | 87 * GrPrimitiveProcessor defines an interface which all subclasses must implement
. All |
| 101 * GrPrimitiveProcessors must proivide seed color and coverage for the Ganesh co
lor / coverage | 88 * GrPrimitiveProcessors must proivide seed color and coverage for the Ganesh co
lor / coverage |
| 102 * pipelines, and they must provide some notion of equality | 89 * pipelines, and they must provide some notion of equality |
| 103 */ | 90 */ |
| 104 class GrPrimitiveProcessor : public GrProcessor { | 91 class GrPrimitiveProcessor : public GrProcessor { |
| 105 public: | 92 public: |
| 106 // TODO let the PrimProc itself set this in its setData call, this should re
ally live on the | 93 // TODO let the PrimProc itself set this in its setData call, this should re
ally live on the |
| 107 // bundle of primitive data | 94 // bundle of primitive data |
| 108 const SkMatrix& viewMatrix() const { return fViewMatrix; } | 95 const SkMatrix& viewMatrix() const { return fViewMatrix; } |
| 109 const SkMatrix& localMatrix() const { return fLocalMatrix; } | 96 const SkMatrix& localMatrix() const { return fLocalMatrix; } |
| 110 | 97 |
| 111 virtual void initBatchTracker(GrBatchTracker*, const GrPipelineInfo&) const
= 0; | 98 /* |
| 99 * This struct allows the optstate to communicate requirements to the GrPrim
itiveProcessor. |
| 100 */ |
| 101 struct InitBT { |
| 102 bool fColorIgnored; |
| 103 bool fCoverageIgnored; |
| 104 GrColor fOverrideColor; |
| 105 bool fUsesLocalCoords; |
| 106 }; |
| 107 |
| 108 virtual void initBatchTracker(GrBatchTracker*, const InitBT&) const = 0; |
| 112 | 109 |
| 113 virtual bool canMakeEqual(const GrBatchTracker& mine, | 110 virtual bool canMakeEqual(const GrBatchTracker& mine, |
| 114 const GrPrimitiveProcessor& that, | 111 const GrPrimitiveProcessor& that, |
| 115 const GrBatchTracker& theirs) const = 0; | 112 const GrBatchTracker& theirs) const = 0; |
| 116 | 113 |
| 117 virtual void getInvariantOutputColor(GrInitInvariantOutput* out) const = 0; | 114 virtual void getInvariantOutputColor(GrInitInvariantOutput* out) const = 0; |
| 118 virtual void getInvariantOutputCoverage(GrInitInvariantOutput* out) const =
0; | 115 virtual void getInvariantOutputCoverage(GrInitInvariantOutput* out) const =
0; |
| 119 | 116 |
| 120 // Only the GrGeometryProcessor subclass actually has a geo shader or vertex
attributes, but | 117 // Only the GrGeometryProcessor subclass actually has a geo shader or vertex
attributes, but |
| 121 // we put these calls on the base class to prevent having to cast | 118 // we put these calls on the base class to prevent having to cast |
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| 300 /* | 297 /* |
| 301 * An optional simple helper function to determine by what means the GrGeome
tryProcessor should | 298 * An optional simple helper function to determine by what means the GrGeome
tryProcessor should |
| 302 * use to provide color. If we are given an override color(ie the given ove
rridecolor is NOT | 299 * use to provide color. If we are given an override color(ie the given ove
rridecolor is NOT |
| 303 * GrColor_ILLEGAL) then we must always emit that color(currently overrides
are only supported | 300 * GrColor_ILLEGAL) then we must always emit that color(currently overrides
are only supported |
| 304 * via uniform, but with deferred Geometry we could use attributes). Otherw
ise, if our color is | 301 * via uniform, but with deferred Geometry we could use attributes). Otherw
ise, if our color is |
| 305 * ignored then we should not emit a color. Lastly, if we don't have vertex
colors then we must | 302 * ignored then we should not emit a color. Lastly, if we don't have vertex
colors then we must |
| 306 * emit a color via uniform | 303 * emit a color via uniform |
| 307 * TODO this function changes quite a bit with deferred geometry. There the
GrGeometryProcessor | 304 * TODO this function changes quite a bit with deferred geometry. There the
GrGeometryProcessor |
| 308 * can upload a new color via attribute if needed. | 305 * can upload a new color via attribute if needed. |
| 309 */ | 306 */ |
| 310 static GrGPInput GetColorInputType(GrColor* color, GrColor primitiveColor, | 307 static GrGPInput GetColorInputType(GrColor* color, GrColor primitiveColor, c
onst InitBT& init, |
| 311 const GrPipelineInfo& init, | |
| 312 bool hasVertexColor) { | 308 bool hasVertexColor) { |
| 313 if (init.fColorIgnored) { | 309 if (init.fColorIgnored) { |
| 314 *color = GrColor_ILLEGAL; | 310 *color = GrColor_ILLEGAL; |
| 315 return kIgnored_GrGPInput; | 311 return kIgnored_GrGPInput; |
| 316 } else if (GrColor_ILLEGAL != init.fOverrideColor) { | 312 } else if (GrColor_ILLEGAL != init.fOverrideColor) { |
| 317 *color = init.fOverrideColor; | 313 *color = init.fOverrideColor; |
| 318 return kUniform_GrGPInput; | 314 return kUniform_GrGPInput; |
| 319 } | 315 } |
| 320 | 316 |
| 321 *color = primitiveColor; | 317 *color = primitiveColor; |
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| 375 * extending this class to handle all nvpr uniform / varying / program work. | 371 * extending this class to handle all nvpr uniform / varying / program work. |
| 376 */ | 372 */ |
| 377 class GrPathProcessor : public GrPrimitiveProcessor { | 373 class GrPathProcessor : public GrPrimitiveProcessor { |
| 378 public: | 374 public: |
| 379 static GrPathProcessor* Create(GrColor color, | 375 static GrPathProcessor* Create(GrColor color, |
| 380 const SkMatrix& viewMatrix = SkMatrix::I(), | 376 const SkMatrix& viewMatrix = SkMatrix::I(), |
| 381 const SkMatrix& localMatrix = SkMatrix::I())
{ | 377 const SkMatrix& localMatrix = SkMatrix::I())
{ |
| 382 return SkNEW_ARGS(GrPathProcessor, (color, viewMatrix, localMatrix)); | 378 return SkNEW_ARGS(GrPathProcessor, (color, viewMatrix, localMatrix)); |
| 383 } | 379 } |
| 384 | 380 |
| 385 void initBatchTracker(GrBatchTracker*, const GrPipelineInfo&) const SK_OVERR
IDE; | 381 void initBatchTracker(GrBatchTracker*, const InitBT&) const SK_OVERRIDE; |
| 386 | 382 |
| 387 bool canMakeEqual(const GrBatchTracker& mine, | 383 bool canMakeEqual(const GrBatchTracker& mine, |
| 388 const GrPrimitiveProcessor& that, | 384 const GrPrimitiveProcessor& that, |
| 389 const GrBatchTracker& theirs) const SK_OVERRIDE; | 385 const GrBatchTracker& theirs) const SK_OVERRIDE; |
| 390 | 386 |
| 391 const char* name() const SK_OVERRIDE { return "PathProcessor"; } | 387 const char* name() const SK_OVERRIDE { return "PathProcessor"; } |
| 392 | 388 |
| 393 GrColor color() const { return fColor; } | 389 GrColor color() const { return fColor; } |
| 394 | 390 |
| 395 void getInvariantOutputColor(GrInitInvariantOutput* out) const SK_OVERRIDE; | 391 void getInvariantOutputColor(GrInitInvariantOutput* out) const SK_OVERRIDE; |
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| 409 | 405 |
| 410 private: | 406 private: |
| 411 bool hasExplicitLocalCoords() const SK_OVERRIDE { return false; } | 407 bool hasExplicitLocalCoords() const SK_OVERRIDE { return false; } |
| 412 | 408 |
| 413 GrColor fColor; | 409 GrColor fColor; |
| 414 | 410 |
| 415 typedef GrPrimitiveProcessor INHERITED; | 411 typedef GrPrimitiveProcessor INHERITED; |
| 416 }; | 412 }; |
| 417 | 413 |
| 418 #endif | 414 #endif |
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