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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 GrOptDrawState_DEFINED | 8 #ifndef GrOptDrawState_DEFINED |
9 #define GrOptDrawState_DEFINED | 9 #define GrOptDrawState_DEFINED |
10 | 10 |
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21 bool operator== (const GrOptDrawState& that) const; | 21 bool operator== (const GrOptDrawState& that) const; |
22 | 22 |
23 bool inputColorIsUsed() const { return fInputColorIsUsed; } | 23 bool inputColorIsUsed() const { return fInputColorIsUsed; } |
24 bool inputCoverageIsUsed() const { return fInputCoverageIsUsed; } | 24 bool inputCoverageIsUsed() const { return fInputCoverageIsUsed; } |
25 | 25 |
26 bool readsDst() const { return fReadsDst; } | 26 bool readsDst() const { return fReadsDst; } |
27 bool readsFragPosition() const { return fReadsFragPosition; } | 27 bool readsFragPosition() const { return fReadsFragPosition; } |
28 bool requiresVertexShader() const { return fRequiresVertexShader; } | 28 bool requiresVertexShader() const { return fRequiresVertexShader; } |
29 bool requiresLocalCoordAttrib() const { return fRequiresLocalCoordAttrib; } | 29 bool requiresLocalCoordAttrib() const { return fRequiresLocalCoordAttrib; } |
30 | 30 |
| 31 /////////////////////////////////////////////////////////////////////////// |
| 32 /// @name Stage Output Types |
| 33 //// |
| 34 |
| 35 enum PrimaryOutputType { |
| 36 // Modulate color and coverage, write result as the color output. |
| 37 kModulate_PrimaryOutputType, |
| 38 // Combines the coverage, dst, and color as coverage * color + (1 - cove
rage) * dst. This |
| 39 // can only be set if fDstReadKey is non-zero. |
| 40 kCombineWithDst_PrimaryOutputType, |
| 41 |
| 42 kPrimaryOutputTypeCnt, |
| 43 }; |
| 44 |
| 45 enum SecondaryOutputType { |
| 46 // There is no secondary output |
| 47 kNone_SecondaryOutputType, |
| 48 // Writes coverage as the secondary output. Only set if dual source blen
ding is supported |
| 49 // and primary output is kModulate. |
| 50 kCoverage_SecondaryOutputType, |
| 51 // Writes coverage * (1 - colorA) as the secondary output. Only set if d
ual source blending |
| 52 // is supported and primary output is kModulate. |
| 53 kCoverageISA_SecondaryOutputType, |
| 54 // Writes coverage * (1 - colorRGBA) as the secondary output. Only set i
f dual source |
| 55 // blending is supported and primary output is kModulate. |
| 56 kCoverageISC_SecondaryOutputType, |
| 57 |
| 58 kSecondaryOutputTypeCnt, |
| 59 }; |
| 60 |
| 61 PrimaryOutputType getPrimaryOutputType() const { return fPrimaryOutputType;
} |
| 62 SecondaryOutputType getSecondaryOutputType() const { return fSecondaryOutput
Type; } |
| 63 |
| 64 /// @} |
| 65 |
31 private: | 66 private: |
32 /** | 67 /** |
33 * Constructs and optimized drawState out of a GrRODrawState. | 68 * Constructs and optimized drawState out of a GrRODrawState. |
34 */ | 69 */ |
35 GrOptDrawState(const GrDrawState& drawState, BlendOptFlags blendOptFlags, | 70 GrOptDrawState(const GrDrawState& drawState, BlendOptFlags blendOptFlags, |
36 GrBlendCoeff optSrcCoeff, GrBlendCoeff optDstCoeff); | 71 GrBlendCoeff optSrcCoeff, GrBlendCoeff optDstCoeff, |
| 72 const GrDrawTargetCaps& caps); |
37 | 73 |
38 /** | 74 /** |
39 * Loops through all the color stage effects to check if the stage will igno
re color input or | 75 * Loops through all the color stage effects to check if the stage will igno
re color input or |
40 * always output a constant color. In the ignore color input case we can ign
ore all previous | 76 * always output a constant color. In the ignore color input case we can ign
ore all previous |
41 * stages. In the constant color case, we can ignore all previous stages and | 77 * stages. In the constant color case, we can ignore all previous stages and |
42 * the current one and set the state color to the constant color. Once we de
termine the so | 78 * the current one and set the state color to the constant color. Once we de
termine the so |
43 * called first effective stage, we copy all the effective stages into our o
ptimized | 79 * called first effective stage, we copy all the effective stages into our o
ptimized |
44 * state. | 80 * state. |
45 */ | 81 */ |
46 void copyEffectiveColorStages(const GrDrawState& ds); | 82 void copyEffectiveColorStages(const GrDrawState& ds); |
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65 * BlendOptFlags. | 101 * BlendOptFlags. |
66 */ | 102 */ |
67 void adjustFromBlendOpts(); | 103 void adjustFromBlendOpts(); |
68 | 104 |
69 /** | 105 /** |
70 * Loop over the effect stages to determine various info like what data they
will read and what | 106 * Loop over the effect stages to determine various info like what data they
will read and what |
71 * shaders they require. | 107 * shaders they require. |
72 */ | 108 */ |
73 void getStageStats(); | 109 void getStageStats(); |
74 | 110 |
| 111 /** |
| 112 * Calculates the primary and secondary output types of the shader. For cert
ain output types |
| 113 * the function may adjust the blend coefficients. After this function is ca
lled the src and dst |
| 114 * blend coeffs will represent those used by backend API. |
| 115 */ |
| 116 void setOutputStateInfo(const GrDrawTargetCaps&); |
| 117 |
75 // These flags are needed to protect the code from creating an unused unifor
m color/coverage | 118 // These flags are needed to protect the code from creating an unused unifor
m color/coverage |
76 // which will cause shader compiler errors. | 119 // which will cause shader compiler errors. |
77 bool fInputColorIsUsed; | 120 bool fInputColorIsUsed; |
78 bool fInputCoverageIsUsed; | 121 bool fInputCoverageIsUsed; |
79 | 122 |
80 // These flags give aggregated info on the effect stages that are used when
building programs. | 123 // These flags give aggregated info on the effect stages that are used when
building programs. |
81 bool fReadsDst; | 124 bool fReadsDst; |
82 bool fReadsFragPosition; | 125 bool fReadsFragPosition; |
83 bool fRequiresVertexShader; | 126 bool fRequiresVertexShader; |
84 bool fRequiresLocalCoordAttrib; | 127 bool fRequiresLocalCoordAttrib; |
85 | 128 |
86 SkAutoSTArray<4, GrVertexAttrib> fOptVA; | 129 SkAutoSTArray<4, GrVertexAttrib> fOptVA; |
87 | 130 |
88 BlendOptFlags fBlendOptFlags; | 131 BlendOptFlags fBlendOptFlags; |
89 | 132 |
90 friend GrOptDrawState* GrDrawState::createOptState() const; | 133 // Fragment shader color outputs |
| 134 PrimaryOutputType fPrimaryOutputType : 8; |
| 135 SecondaryOutputType fSecondaryOutputType : 8; |
| 136 |
| 137 friend GrOptDrawState* GrDrawState::createOptState(const GrDrawTargetCaps&)
const; |
91 typedef GrRODrawState INHERITED; | 138 typedef GrRODrawState INHERITED; |
92 }; | 139 }; |
93 | 140 |
94 #endif | 141 #endif |
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