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Side by Side Diff: src/gpu/glsl/GrGLSLFragmentShaderBuilder.h

Issue 1438003003: Move all ShaderBuilder files to GLSL (Closed) Base URL: https://skia.googlesource.com/skia.git@glslProgBuild
Patch Set: nits Created 5 years, 1 month 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 GrGLFragmentShaderBuilder_DEFINED 8 #ifndef GrGLSLFragmentShaderBuilder_DEFINED
9 #define GrGLFragmentShaderBuilder_DEFINED 9 #define GrGLSLFragmentShaderBuilder_DEFINED
10 10
11 #include "GrGLShaderBuilder.h" 11 #include "GrGLSLShaderBuilder.h"
12 12
13 #include "glsl/GrGLSLProcessorTypes.h" 13 #include "glsl/GrGLSLProcessorTypes.h"
14 14
15 class GrRenderTarget; 15 class GrRenderTarget;
16 class GrGLSLVarying; 16 class GrGLSLVarying;
17 17
18 /* 18 /*
19 * This base class encapsulates the functionality which the GP uses to build fra gment shaders 19 * This base class encapsulates the functionality which the GP uses to build fra gment shaders
20 */ 20 */
21 class GrGLFragmentBuilder : public GrGLShaderBuilder { 21 class GrGLSLFragmentBuilder : public GrGLSLShaderBuilder {
22 public: 22 public:
23 GrGLFragmentBuilder(GrGLSLProgramBuilder* program) 23 GrGLSLFragmentBuilder(GrGLSLProgramBuilder* program)
24 : INHERITED(program) 24 : INHERITED(program)
25 , fHasCustomColorOutput(false) 25 , fHasCustomColorOutput(false)
26 , fHasSecondaryOutput(false) { 26 , fHasSecondaryOutput(false) {
27 fSubstageIndices.push_back(0); 27 fSubstageIndices.push_back(0);
28 } 28 }
29 virtual ~GrGLFragmentBuilder() {} 29 virtual ~GrGLSLFragmentBuilder() {}
30 /** 30 /**
31 * Use of these features may require a GLSL extension to be enabled. Shaders may not compile 31 * Use of these features may require a GLSL extension to be enabled. Shaders may not compile
32 * if code is added that uses one of these features without calling enableFe ature() 32 * if code is added that uses one of these features without calling enableFe ature()
33 */ 33 */
34 enum GLSLFeature { 34 enum GLSLFeature {
35 kStandardDerivatives_GLSLFeature = 0, 35 kStandardDerivatives_GLSLFeature = 0,
36 kLastGLSLFeature = kStandardDerivatives_GLSLFeature 36 kLastGLSLFeature = kStandardDerivatives_GLSLFeature
37 }; 37 };
38 38
39 /** 39 /**
(...skipping 46 matching lines...) Expand 10 before | Expand all | Expand 10 after
86 * procs so no duplicate uniforms/functions appear in the generated shader p rogram. The mangle 86 * procs so no duplicate uniforms/functions appear in the generated shader p rogram. The mangle
87 * string is simply based on fSubstageIndices. For example, if fSubstageIndi ces = [3, 1, 2, 0], 87 * string is simply based on fSubstageIndices. For example, if fSubstageIndi ces = [3, 1, 2, 0],
88 * then the manglestring will be "_c3_c1_c2", and any uniform/function emitt ed by that proc will 88 * then the manglestring will be "_c3_c1_c2", and any uniform/function emitt ed by that proc will
89 * have "_c3_c1_c2" appended to its name, which can be interpreted as "base proc's 3rd child's 89 * have "_c3_c1_c2" appended to its name, which can be interpreted as "base proc's 3rd child's
90 * 1st child's 2nd child". 90 * 1st child's 2nd child".
91 */ 91 */
92 SkString fMangleString; 92 SkString fMangleString;
93 93
94 friend class GrGLPathProcessor; 94 friend class GrGLPathProcessor;
95 95
96 typedef GrGLShaderBuilder INHERITED; 96 typedef GrGLSLShaderBuilder INHERITED;
97 }; 97 };
98 98
99 /* 99 /*
100 * Fragment processor's, in addition to all of the above, may need to use dst co lor so they use 100 * Fragment processor's, in addition to all of the above, may need to use dst co lor so they use
101 * this builder to create their shader. Because this is the only shader builder the FP sees, we 101 * this builder to create their shader. Because this is the only shader builder the FP sees, we
102 * just call it FPShaderBuilder 102 * just call it FPShaderBuilder
103 */ 103 */
104 class GrGLXPFragmentBuilder : public GrGLFragmentBuilder { 104 class GrGLSLXPFragmentBuilder : public GrGLSLFragmentBuilder {
105 public: 105 public:
106 GrGLXPFragmentBuilder(GrGLSLProgramBuilder* program) : INHERITED(program) {} 106 GrGLSLXPFragmentBuilder(GrGLSLProgramBuilder* program) : INHERITED(program) {}
107 107
108 /** Returns the variable name that holds the color of the destination pixel. This may be nullptr if 108 /** Returns the variable name that holds the color of the destination pixel. This may be nullptr if
109 no effect advertised that it will read the destination. */ 109 no effect advertised that it will read the destination. */
110 virtual const char* dstColor() = 0; 110 virtual const char* dstColor() = 0;
111 111
112 /** Adds any necessary layout qualifiers in order to legalize the supplied b lend equation with 112 /** Adds any necessary layout qualifiers in order to legalize the supplied b lend equation with
113 this shader. It is only legal to call this method with an advanced blend equation, and only 113 this shader. It is only legal to call this method with an advanced blend equation, and only
114 if these equations are supported. */ 114 if these equations are supported. */
115 virtual void enableAdvancedBlendEquationIfNeeded(GrBlendEquation) = 0; 115 virtual void enableAdvancedBlendEquationIfNeeded(GrBlendEquation) = 0;
116 116
117 private: 117 private:
118 typedef GrGLFragmentBuilder INHERITED; 118 typedef GrGLSLFragmentBuilder INHERITED;
119 }; 119 };
120 120
121 // TODO rename to Fragment Builder 121 // TODO rename to Fragment Builder
122 class GrGLFragmentShaderBuilder : public GrGLXPFragmentBuilder { 122 class GrGLSLFragmentShaderBuilder : public GrGLSLXPFragmentBuilder {
123 public: 123 public:
124 typedef uint8_t FragPosKey; 124 typedef uint8_t FragPosKey;
125 125
126 /** Returns a key for reading the fragment location. This should only be cal led if there is an 126 /** Returns a key for reading the fragment location. This should only be cal led if there is an
127 effect that will requires the fragment position. If the fragment position is not required, 127 effect that will requires the fragment position. If the fragment position is not required,
128 the key is 0. */ 128 the key is 0. */
129 static FragPosKey KeyForFragmentPosition(const GrRenderTarget* dst); 129 static FragPosKey KeyForFragmentPosition(const GrRenderTarget* dst);
130 130
131 GrGLFragmentShaderBuilder(GrGLSLProgramBuilder* program, uint8_t fragPosKey) ; 131 GrGLSLFragmentShaderBuilder(GrGLSLProgramBuilder* program, uint8_t fragPosKe y);
132 132
133 // true public interface, defined explicitly in the abstract interfaces abov e 133 // true public interface, defined explicitly in the abstract interfaces abov e
134 bool enableFeature(GLSLFeature) override; 134 bool enableFeature(GLSLFeature) override;
135 virtual SkString ensureFSCoords2D(const GrGLSLTransformedCoordsArray& coords , 135 virtual SkString ensureFSCoords2D(const GrGLSLTransformedCoordsArray& coords ,
136 int index) override; 136 int index) override;
137 const char* fragmentPosition() override; 137 const char* fragmentPosition() override;
138 const char* dstColor() override; 138 const char* dstColor() override;
139 139
140 void enableAdvancedBlendEquationIfNeeded(GrBlendEquation) override; 140 void enableAdvancedBlendEquationIfNeeded(GrBlendEquation) override;
141 141
(...skipping 17 matching lines...) Expand all
159 static const char* DeclaredSecondaryColorOutputName() { return "fsSecondaryC olorOut"; } 159 static const char* DeclaredSecondaryColorOutputName() { return "fsSecondaryC olorOut"; }
160 160
161 /* 161 /*
162 * An internal call for GrGLProgramBuilder to use to add varyings to the ver tex shader 162 * An internal call for GrGLProgramBuilder to use to add varyings to the ver tex shader
163 */ 163 */
164 void addVarying(GrGLSLVarying*, GrSLPrecision); 164 void addVarying(GrGLSLVarying*, GrSLPrecision);
165 165
166 void onFinalize() override; 166 void onFinalize() override;
167 167
168 /** 168 /**
169 * Features that should only be enabled by GrGLFragmentShaderBuilder itself. 169 * Features that should only be enabled by GrGLSLFragmentShaderBuilder itsel f.
170 */ 170 */
171 enum GLSLPrivateFeature { 171 enum GLSLPrivateFeature {
172 kFragCoordConventions_GLSLPrivateFeature = kLastGLSLFeature + 1, 172 kFragCoordConventions_GLSLPrivateFeature = kLastGLSLFeature + 1,
173 kBlendEquationAdvanced_GLSLPrivateFeature, 173 kBlendEquationAdvanced_GLSLPrivateFeature,
174 kBlendFuncExtended_GLSLPrivateFeature, 174 kBlendFuncExtended_GLSLPrivateFeature,
175 kLastGLSLPrivateFeature = kBlendFuncExtended_GLSLPrivateFeature 175 kLastGLSLPrivateFeature = kBlendFuncExtended_GLSLPrivateFeature
176 }; 176 };
177 177
178 // Interpretation of FragPosKey when generating code 178 // Interpretation of FragPosKey when generating code
179 enum { 179 enum {
180 kNoFragPosRead_FragPosKey = 0, // The fragment positition wil l not be needed. 180 kNoFragPosRead_FragPosKey = 0, // The fragment positition wil l not be needed.
181 kTopLeftFragPosRead_FragPosKey = 0x1,// Read frag pos relative to t op-left. 181 kTopLeftFragPosRead_FragPosKey = 0x1,// Read frag pos relative to t op-left.
182 kBottomLeftFragPosRead_FragPosKey = 0x2,// Read frag pos relative to b ottom-left. 182 kBottomLeftFragPosRead_FragPosKey = 0x2,// Read frag pos relative to b ottom-left.
183 }; 183 };
184 184
185 static const char* kDstTextureColorName; 185 static const char* kDstTextureColorName;
186 186
187 bool fSetupFragPosition; 187 bool fSetupFragPosition;
188 bool fTopLeftFragPosRead; 188 bool fTopLeftFragPosRead;
189 int fCustomColorOutputIndex; 189 int fCustomColorOutputIndex;
190 190
191 // some state to verify shaders and effects are consistent, this is reset be tween effects by 191 // some state to verify shaders and effects are consistent, this is reset be tween effects by
192 // the program creator 192 // the program creator
193 bool fHasReadDstColor; 193 bool fHasReadDstColor;
194 bool fHasReadFragmentPosition; 194 bool fHasReadFragmentPosition;
195 195
196 friend class GrGLProgramBuilder; 196 friend class GrGLProgramBuilder;
197 197
198 typedef GrGLXPFragmentBuilder INHERITED; 198 typedef GrGLSLXPFragmentBuilder INHERITED;
199 }; 199 };
200 200
201 #endif 201 #endif
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