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/*
* 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(3,30)) {
*generation = k330_GrGLSLGeneration;
} else 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:
SkASSERT(ver >= GR_GL_VER(1,00));
if (ver >= GR_GLSL_VER(3,1)) {
*generation = k310es_GrGLSLGeneration;
}
else if (ver >= GR_GLSL_VER(3,0)) {
*generation = k330_GrGLSLGeneration;
} else {
*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";
}
case k330_GrGLSLGeneration:
if (kGLES_GrGLStandard == info.standard()) {
return "#version 300 es\n";
} else {
SkASSERT(kGL_GrGLStandard == info.standard());
return "#version 330 compatibility\n";
}
case k310es_GrGLSLGeneration:
SkASSERT(kGLES_GrGLStandard == info.standard());
return "#version 310 es\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());
}
}
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