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comparison: gfx/skia/trunk/src/gpu/gl/GrGLSL.cpp
gfx/skia/trunk/src/gpu/gl/GrGLSL.cpp
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:408181540d61 |
|---|---|
| 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 GrGLSLGeneration GrGetGLSLGeneration(const GrGLInterface* gl) { | |
| 13 GrGLSLVersion ver = GrGLGetGLSLVersion(gl); | |
| 14 switch (gl->fStandard) { | |
| 15 case kGL_GrGLStandard: | |
| 16 SkASSERT(ver >= GR_GLSL_VER(1,10)); | |
| 17 if (ver >= GR_GLSL_VER(1,50)) { | |
| 18 return k150_GrGLSLGeneration; | |
| 19 } else if (ver >= GR_GLSL_VER(1,40)) { | |
| 20 return k140_GrGLSLGeneration; | |
| 21 } else if (ver >= GR_GLSL_VER(1,30)) { | |
| 22 return k130_GrGLSLGeneration; | |
| 23 } else { | |
| 24 return k110_GrGLSLGeneration; | |
| 25 } | |
| 26 case kGLES_GrGLStandard: | |
| 27 // version 1.00 of ES GLSL based on ver 1.20 of desktop GLSL | |
| 28 SkASSERT(ver >= GR_GL_VER(1,00)); | |
| 29 return k110_GrGLSLGeneration; | |
| 30 default: | |
| 31 GrCrash("Unknown GL Standard"); | |
| 32 return k110_GrGLSLGeneration; // suppress warning | |
| 33 } | |
| 34 } | |
| 35 | |
| 36 const char* GrGetGLSLVersionDecl(const GrGLContextInfo& info) { | |
| 37 switch (info.glslGeneration()) { | |
| 38 case k110_GrGLSLGeneration: | |
| 39 if (kGLES_GrGLStandard == info.standard()) { | |
| 40 // ES2s shader language is based on version 1.20 but is version | |
| 41 // 1.00 of the ES language. | |
| 42 return "#version 100\n"; | |
| 43 } else { | |
| 44 SkASSERT(kGL_GrGLStandard == info.standard()); | |
| 45 return "#version 110\n"; | |
| 46 } | |
| 47 case k130_GrGLSLGeneration: | |
| 48 SkASSERT(kGL_GrGLStandard == info.standard()); | |
| 49 return "#version 130\n"; | |
| 50 case k140_GrGLSLGeneration: | |
| 51 SkASSERT(kGL_GrGLStandard == info.standard()); | |
| 52 return "#version 140\n"; | |
| 53 case k150_GrGLSLGeneration: | |
| 54 SkASSERT(kGL_GrGLStandard == info.standard()); | |
| 55 if (info.caps()->isCoreProfile()) { | |
| 56 return "#version 150\n"; | |
| 57 } else { | |
| 58 return "#version 150 compatibility\n"; | |
| 59 } | |
| 60 default: | |
| 61 GrCrash("Unknown GL version."); | |
| 62 return ""; // suppress warning | |
| 63 } | |
| 64 } | |
| 65 | |
| 66 namespace { | |
| 67 void append_tabs(SkString* outAppend, int tabCnt) { | |
| 68 static const char kTabs[] = "\t\t\t\t\t\t\t\t"; | |
| 69 while (tabCnt) { | |
| 70 int cnt = GrMin((int)GR_ARRAY_COUNT(kTabs), tabCnt); | |
| 71 outAppend->append(kTabs, cnt); | |
| 72 tabCnt -= cnt; | |
| 73 } | |
| 74 } | |
| 75 } | |
| 76 | |
| 77 void GrGLSLMulVarBy4f(SkString* outAppend, | |
| 78 unsigned tabCnt, | |
| 79 const char* vec4VarName, | |
| 80 const GrGLSLExpr4& mulFactor) { | |
| 81 if (mulFactor.isOnes()) { | |
| 82 *outAppend = SkString(); | |
| 83 } | |
| 84 | |
| 85 append_tabs(outAppend, tabCnt); | |
| 86 | |
| 87 if (mulFactor.isZeros()) { | |
| 88 outAppend->appendf("%s = vec4(0);\n", vec4VarName); | |
| 89 } else { | |
| 90 outAppend->appendf("%s *= %s;\n", vec4VarName, mulFactor.c_str()); | |
| 91 } | |
| 92 } |
