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

Issue 1139723004: Preliminary attempt to remove batch tracker (Closed) Base URL: https://skia.googlesource.com/skia.git@cleanup5
Patch Set: tweaks Created 5 years, 7 months ago
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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 "GrPrimitiveProcessor.h" 11 #include "GrPrimitiveProcessor.h"
12 12
13 /** 13 /**
14 * A GrGeometryProcessor is a flexible method for rendering a primitive. The Gr GeometryProcessor 14 * A GrGeometryProcessor is a flexible method for rendering a primitive. The Gr GeometryProcessor
15 * has complete control over vertex attributes and uniforms(aside from the rende r target) but it 15 * has complete control over vertex attributes and uniforms(aside from the rende r target) but it
16 * must obey the same contract as any GrPrimitiveProcessor, specifically it must emit a color and 16 * must obey the same contract as any GrPrimitiveProcessor, specifically it must emit a color and
17 * coverage into the fragment shader. Where this color and coverage come from i s completely the 17 * coverage into the fragment shader. Where this color and coverage come from i s completely the
18 * responsibility of the GrGeometryProcessor. 18 * responsibility of the GrGeometryProcessor.
19 */ 19 */
20 class GrGeometryProcessor : public GrPrimitiveProcessor { 20 class GrGeometryProcessor : public GrPrimitiveProcessor {
21 public: 21 public:
22 GrGeometryProcessor() 22 GrGeometryProcessor()
23 : INHERITED(false) 23 : INHERITED(false)
24 , fWillUseGeoShader(false) 24 , fWillUseGeoShader(false)
25 , fHasLocalCoords(false) {} 25 , fHasLocalCoords(false) {}
26 26
27 bool willUseGeoShader() const { return fWillUseGeoShader; } 27 bool willUseGeoShader() const { return fWillUseGeoShader; }
28 28
29 // TODO delete when paths are in batch
30 void initBatchTracker(GrBatchTracker*, const GrPipelineInfo&) const override {}
31
29 // TODO delete this when paths are in batch 32 // TODO delete this when paths are in batch
30 bool canMakeEqual(const GrBatchTracker& mine, 33 bool canMakeEqual(const GrBatchTracker& mine,
31 const GrPrimitiveProcessor& that, 34 const GrPrimitiveProcessor& that,
32 const GrBatchTracker& theirs) const override { 35 const GrBatchTracker& theirs) const override {
33 SkFAIL("Unsupported\n"); 36 SkFAIL("Unsupported\n");
34 return false; 37 return false;
35 } 38 }
36 39
37 // TODO Delete when paths are in batch 40 // TODO Delete when paths are in batch
38 void getInvariantOutputColor(GrInitInvariantOutput* out) const override { 41 void getInvariantOutputColor(GrInitInvariantOutput* out) const override {
39 SkFAIL("Unsupported\n"); 42 SkFAIL("Unsupported\n");
40 } 43 }
41 void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override { 44 void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override {
42 SkFAIL("Unsupported\n"); 45 SkFAIL("Unsupported\n");
43 } 46 }
44 47
45 protected: 48 protected:
46 /*
47 * An optional simple helper function to determine by what means the GrGeome tryProcessor should
48 * use to provide color. If we are given an override color(ie the given ove rridecolor is NOT
49 * GrColor_ILLEGAL) then we must always emit that color(currently overrides are only supported
50 * via uniform, but with deferred Geometry we could use attributes). Otherw ise, if our color is
51 * ignored then we should not emit a color. Lastly, if we don't have vertex colors then we must
52 * emit a color via uniform
53 * TODO this function changes quite a bit with deferred geometry. There the GrGeometryProcessor
54 * can upload a new color via attribute if needed.
55 */
56 static GrGPInput GetColorInputType(GrColor* color, GrColor primitiveColor,
57 const GrPipelineInfo& init,
58 bool hasVertexColor) {
59 if (init.fColorIgnored) {
60 *color = GrColor_ILLEGAL;
61 return kIgnored_GrGPInput;
62 } else if (GrColor_ILLEGAL != init.fOverrideColor) {
63 *color = init.fOverrideColor;
64 return kUniform_GrGPInput;
65 }
66
67 *color = primitiveColor;
68 if (hasVertexColor) {
69 return kAttribute_GrGPInput;
70 } else {
71 return kUniform_GrGPInput;
72 }
73 }
74
75 /** 49 /**
76 * Subclasses call this from their constructor to register vertex attributes . Attributes 50 * Subclasses call this from their constructor to register vertex attributes . Attributes
77 * will be padded to the nearest 4 bytes for performance reasons. 51 * will be padded to the nearest 4 bytes for performance reasons.
78 * TODO After deferred geometry, we should do all of this inline in Generate Geometry alongside 52 * TODO After deferred geometry, we should do all of this inline in Generate Geometry alongside
79 * the struct used to actually populate the attributes. This is all extreme ly fragile, vertex 53 * the struct used to actually populate the attributes. This is all extreme ly fragile, vertex
80 * attributes have to be added in the order they will appear in the struct w hich maps memory. 54 * attributes have to be added in the order they will appear in the struct w hich maps memory.
81 * The processor key should reflect the vertex attributes, or there lack the reof in the 55 * The processor key should reflect the vertex attributes, or there lack the reof in the
82 * GrGeometryProcessor. 56 * GrGeometryProcessor.
83 */ 57 */
84 const Attribute& addVertexAttrib(const Attribute& attribute) { 58 const Attribute& addVertexAttrib(const Attribute& attribute) {
(...skipping 11 matching lines...) Expand all
96 private: 70 private:
97 bool hasExplicitLocalCoords() const override { return fHasLocalCoords; } 71 bool hasExplicitLocalCoords() const override { return fHasLocalCoords; }
98 72
99 bool fWillUseGeoShader; 73 bool fWillUseGeoShader;
100 bool fHasLocalCoords; 74 bool fHasLocalCoords;
101 75
102 typedef GrPrimitiveProcessor INHERITED; 76 typedef GrPrimitiveProcessor INHERITED;
103 }; 77 };
104 78
105 #endif 79 #endif
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