| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrGLSL.h" |
| #include "GrGLShaderVar.h" |
| #include "SkString.h" |
| |
| bool GrGetGLSLGeneration(const GrGLInterface* gl, GrGLSLGeneration* generation) { |
| SkASSERT(generation); |
| GrGLSLVersion ver = GrGLGetGLSLVersion(gl); |
| if (GR_GLSL_INVALID_VER == ver) { |
| return false; |
| } |
| switch (gl->fStandard) { |
| case kGL_GrGLStandard: |
| SkASSERT(ver >= GR_GLSL_VER(1,10)); |
| if (ver >= GR_GLSL_VER(1,50)) { |
| *generation = k150_GrGLSLGeneration; |
| } else if (ver >= GR_GLSL_VER(1,40)) { |
| *generation = k140_GrGLSLGeneration; |
| } else if (ver >= GR_GLSL_VER(1,30)) { |
| *generation = k130_GrGLSLGeneration; |
| } else { |
| *generation = k110_GrGLSLGeneration; |
| } |
| return true; |
| case kGLES_GrGLStandard: |
| // version 1.00 of ES GLSL based on ver 1.20 of desktop GLSL |
| SkASSERT(ver >= GR_GL_VER(1,00)); |
| *generation = k110_GrGLSLGeneration; |
| return true; |
| default: |
| SkFAIL("Unknown GL Standard"); |
| return false; |
| } |
| } |
| |
| const char* GrGetGLSLVersionDecl(const GrGLContextInfo& info) { |
| switch (info.glslGeneration()) { |
| case k110_GrGLSLGeneration: |
| if (kGLES_GrGLStandard == info.standard()) { |
| // ES2s shader language is based on version 1.20 but is version |
| // 1.00 of the ES language. |
| return "#version 100\n"; |
| } else { |
| SkASSERT(kGL_GrGLStandard == info.standard()); |
| return "#version 110\n"; |
| } |
| case k130_GrGLSLGeneration: |
| SkASSERT(kGL_GrGLStandard == info.standard()); |
| return "#version 130\n"; |
| case k140_GrGLSLGeneration: |
| SkASSERT(kGL_GrGLStandard == info.standard()); |
| return "#version 140\n"; |
| case k150_GrGLSLGeneration: |
| SkASSERT(kGL_GrGLStandard == info.standard()); |
| if (info.caps()->isCoreProfile()) { |
| return "#version 150\n"; |
| } else { |
| return "#version 150 compatibility\n"; |
| } |
| default: |
| SkFAIL("Unknown GL version."); |
| return ""; // suppress warning |
| } |
| } |
| |
| void GrGLSLMulVarBy4f(SkString* outAppend, const char* vec4VarName, const GrGLSLExpr4& mulFactor) { |
| if (mulFactor.isOnes()) { |
| *outAppend = SkString(); |
| } |
| |
| if (mulFactor.isZeros()) { |
| outAppend->appendf("%s = vec4(0);", vec4VarName); |
| } else { |
| outAppend->appendf("%s *= %s;", vec4VarName, mulFactor.c_str()); |
| } |
| } |