1 /* 2 * Copyright 2011 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "GrGLSL.h" 9 #include "GrGLShaderVar.h" 10 #include "SkString.h" 11 12 bool GrGetGLSLGeneration(const GrGLInterface* gl, GrGLSLGeneration* generation) { 13 SkASSERT(generation); 14 GrGLSLVersion ver = GrGLGetGLSLVersion(gl); 15 if (GR_GLSL_INVALID_VER == ver) { 16 return false; 17 } 18 switch (gl->fStandard) { 19 case kGL_GrGLStandard: 20 SkASSERT(ver >= GR_GLSL_VER(1,10)); 21 if (ver >= GR_GLSL_VER(3,30)) { 22 *generation = k330_GrGLSLGeneration; 23 } else if (ver >= GR_GLSL_VER(1,50)) { 24 *generation = k150_GrGLSLGeneration; 25 } else if (ver >= GR_GLSL_VER(1,40)) { 26 *generation = k140_GrGLSLGeneration; 27 } else if (ver >= GR_GLSL_VER(1,30)) { 28 *generation = k130_GrGLSLGeneration; 29 } else { 30 *generation = k110_GrGLSLGeneration; 31 } 32 return true; 33 case kGLES_GrGLStandard: 34 SkASSERT(ver >= GR_GL_VER(1,00)); 35 if (ver >= GR_GLSL_VER(3,1)) { 36 *generation = k310es_GrGLSLGeneration; 37 } 38 else if (ver >= GR_GLSL_VER(3,0)) { 39 *generation = k330_GrGLSLGeneration; 40 } else { 41 *generation = k110_GrGLSLGeneration; 42 } 43 return true; 44 default: 45 SkFAIL("Unknown GL Standard"); 46 return false; 47 } 48 } 49 50 const char* GrGetGLSLVersionDecl(const GrGLContextInfo& info) { 51 switch (info.glslGeneration()) { 52 case k110_GrGLSLGeneration: 53 if (kGLES_GrGLStandard == info.standard()) { 54 // ES2s shader language is based on version 1.20 but is version 55 // 1.00 of the ES language. 56 return "#version 100\n"; 57 } else { 58 SkASSERT(kGL_GrGLStandard == info.standard()); 59 return "#version 110\n"; 60 } 61 case k130_GrGLSLGeneration: 62 SkASSERT(kGL_GrGLStandard == info.standard()); 63 return "#version 130\n"; 64 case k140_GrGLSLGeneration: 65 SkASSERT(kGL_GrGLStandard == info.standard()); 66 return "#version 140\n"; 67 case k150_GrGLSLGeneration: 68 SkASSERT(kGL_GrGLStandard == info.standard()); 69 if (info.caps()->isCoreProfile()) { 70 return "#version 150\n"; 71 } else { 72 return "#version 150 compatibility\n"; 73 } 74 case k330_GrGLSLGeneration: 75 if (kGLES_GrGLStandard == info.standard()) { 76 return "#version 300 es\n"; 77 } else { 78 SkASSERT(kGL_GrGLStandard == info.standard()); 79 if (info.caps()->isCoreProfile()) { 80 return "#version 330\n"; 81 } else { 82 return "#version 330 compatibility\n"; 83 } 84 } 85 case k310es_GrGLSLGeneration: 86 SkASSERT(kGLES_GrGLStandard == info.standard()); 87 return "#version 310 es\n"; 88 default: 89 SkFAIL("Unknown GL version."); 90 return ""; // suppress warning 91 } 92 } 93 94 void GrGLSLMulVarBy4f(SkString* outAppend, const char* vec4VarName, const GrGLSLExpr4& mulFactor) { 95 if (mulFactor.isOnes()) { 96 *outAppend = SkString(); 97 } 98 99 if (mulFactor.isZeros()) { 100 outAppend->appendf("%s = vec4(0);", vec4VarName); 101 } else { 102 outAppend->appendf("%s *= %s;", vec4VarName, mulFactor.c_str()); 103 } 104 } 105
