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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 GrGLSL_DEFINED | 8 #ifndef GrGLSL_DEFINED |
9 #define GrGLSL_DEFINED | 9 #define GrGLSL_DEFINED |
10 | 10 |
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41 */ | 41 */ |
42 k310es_GrGLSLGeneration, | 42 k310es_GrGLSLGeneration, |
43 }; | 43 }; |
44 | 44 |
45 bool GrGLSLSupportsNamedFragmentShaderOutputs(GrGLSLGeneration); | 45 bool GrGLSLSupportsNamedFragmentShaderOutputs(GrGLSLGeneration); |
46 | 46 |
47 /** | 47 /** |
48 * Gets the name of the function that should be used to sample a 2D texture. Coo
rd type is used | 48 * Gets the name of the function that should be used to sample a 2D texture. Coo
rd type is used |
49 * to indicate whether the texture is sampled using projective textured (kVec3f)
or not (kVec2f). | 49 * to indicate whether the texture is sampled using projective textured (kVec3f)
or not (kVec2f). |
50 */ | 50 */ |
51 inline const char* GrGLSLTexture2DFunctionName(GrSLType coordType, GrGLSLGenerat
ion glslGen) { | 51 inline const char* GrGLSLTexture2DFunctionName(GrSLType coordType, GrSLType samp
lerType, |
| 52 GrGLSLGeneration glslGen) { |
| 53 SkASSERT(GrSLTypeIsSamplerType(samplerType)); |
| 54 SkASSERT(kVec2f_GrSLType == coordType || kVec3f_GrSLType == coordType); |
| 55 // GL_TEXTURE_RECTANGLE_ARB is written against OpenGL 2.0/GLSL 1.10. At that
time there were |
| 56 // separate texture*() functions. In OpenGL 3.0/GLSL 1.30 the different text
ure*() functions |
| 57 // were deprecated in favor or the unified texture() function. RECTANGLE tex
tures became |
| 58 // standard in OpenGL 3.2/GLSL 1.50 and use texture(). It isn't completely c
lear what function |
| 59 // should be used for RECTANGLE textures in GLSL versions >= 1.30 && < 1.50.
We're going with |
| 60 // using texture(). |
| 61 if (glslGen >= k130_GrGLSLGeneration) { |
| 62 return (kVec2f_GrSLType == coordType) ? "texture" : "textureProj"; |
| 63 } |
52 if (kVec2f_GrSLType == coordType) { | 64 if (kVec2f_GrSLType == coordType) { |
53 return glslGen >= k130_GrGLSLGeneration ? "texture" : "texture2D"; | 65 return (samplerType == kSampler2DRect_GrSLType) ? "texture2DRect" : "tex
ture2D"; |
54 } else { | 66 } else { |
55 SkASSERT(kVec3f_GrSLType == coordType); | 67 return (samplerType == kSampler2DRect_GrSLType) ? "texture2DRectProj" :
"texture2DProj"; |
56 return glslGen >= k130_GrGLSLGeneration ? "textureProj" : "texture2DProj
"; | |
57 } | 68 } |
58 } | 69 } |
59 | 70 |
60 /** | 71 /** |
61 * Adds a line of GLSL code to declare the default precision for float types. | 72 * Adds a line of GLSL code to declare the default precision for float types. |
62 */ | 73 */ |
63 void GrGLSLAppendDefaultFloatPrecisionDeclaration(GrSLPrecision, | 74 void GrGLSLAppendDefaultFloatPrecisionDeclaration(GrSLPrecision, |
64 const GrGLSLCaps& glslCaps, | 75 const GrGLSLCaps& glslCaps, |
65 SkString* out); | 76 SkString* out); |
66 | 77 |
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80 case kVec4f_GrSLType: | 91 case kVec4f_GrSLType: |
81 return "vec4"; | 92 return "vec4"; |
82 case kMat33f_GrSLType: | 93 case kMat33f_GrSLType: |
83 return "mat3"; | 94 return "mat3"; |
84 case kMat44f_GrSLType: | 95 case kMat44f_GrSLType: |
85 return "mat4"; | 96 return "mat4"; |
86 case kSampler2D_GrSLType: | 97 case kSampler2D_GrSLType: |
87 return "sampler2D"; | 98 return "sampler2D"; |
88 case kSamplerExternal_GrSLType: | 99 case kSamplerExternal_GrSLType: |
89 return "samplerExternalOES"; | 100 return "samplerExternalOES"; |
| 101 case kSampler2DRect_GrSLType: |
| 102 return "sampler2DRect"; |
90 default: | 103 default: |
91 SkFAIL("Unknown shader var type."); | 104 SkFAIL("Unknown shader var type."); |
92 return ""; // suppress warning | 105 return ""; // suppress warning |
93 } | 106 } |
94 } | 107 } |
95 | 108 |
96 /** A generic base-class representing a GLSL expression. | 109 /** A generic base-class representing a GLSL expression. |
97 * The instance can be a variable name, expression or vecN(0) or vecN(1). Does s
imple constant | 110 * The instance can be a variable name, expression or vecN(0) or vecN(1). Does s
imple constant |
98 * folding with help of 1 and 0. | 111 * folding with help of 1 and 0. |
99 * | 112 * |
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328 | 341 |
329 /** | 342 /** |
330 * Does an inplace mul, *=, of vec4VarName by mulFactor. | 343 * Does an inplace mul, *=, of vec4VarName by mulFactor. |
331 * A semicolon is added after the assignment. | 344 * A semicolon is added after the assignment. |
332 */ | 345 */ |
333 void GrGLSLMulVarBy4f(SkString* outAppend, const char* vec4VarName, const GrGLSL
Expr4& mulFactor); | 346 void GrGLSLMulVarBy4f(SkString* outAppend, const char* vec4VarName, const GrGLSL
Expr4& mulFactor); |
334 | 347 |
335 #include "GrGLSL_impl.h" | 348 #include "GrGLSL_impl.h" |
336 | 349 |
337 #endif | 350 #endif |
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