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//
// Copyright 2002 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
#include "compiler/translator/OutputGLSL.h"
#include "compiler/translator/Compiler.h"
namespace sh
{
TOutputGLSL::TOutputGLSL(TCompiler *compiler,
TInfoSinkBase &objSink,
const ShCompileOptions &compileOptions)
: TOutputGLSLBase(compiler, objSink, compileOptions)
{}
bool TOutputGLSL::writeVariablePrecision(TPrecision)
{
return false;
}
void TOutputGLSL::visitSymbol(TIntermSymbol *node)
{
TInfoSinkBase &out = objSink();
// All the special cases are built-ins, so if it's not a built-in we can return early.
if (node->variable().symbolType() != SymbolType::BuiltIn)
{
TOutputGLSLBase::visitSymbol(node);
return;
}
// Some built-ins get a special translation.
const ImmutableString &name = node->getName();
if (name == "gl_FragDepthEXT")
{
out << "gl_FragDepth";
}
else if (name == "gl_FragColor" && sh::IsGLSL130OrNewer(getShaderOutput()))
{
out << "webgl_FragColor";
}
else if (name == "gl_FragData" && sh::IsGLSL130OrNewer(getShaderOutput()))
{
out << "webgl_FragData";
}
else if (name == "gl_SecondaryFragColorEXT")
{
out << "webgl_SecondaryFragColor";
}
else if (name == "gl_SecondaryFragDataEXT")
{
out << "webgl_SecondaryFragData";
}
else
{
TOutputGLSLBase::visitSymbol(node);
}
}
ImmutableString TOutputGLSL::translateTextureFunction(const ImmutableString &name,
const ShCompileOptions &option)
{
// Check WEBGL_video_texture invocation first.
if (name == "textureVideoWEBGL")
{
if (option.takeVideoTextureAsExternalOES)
{
// TODO(http://anglebug.com/3889): Implement external image situation.
UNIMPLEMENTED();
return ImmutableString("");
}
else
{
// Default translating textureVideoWEBGL to texture2D.
return ImmutableString("texture2D");
}
}
static const char *simpleRename[] = {"texture2DLodEXT",
"texture2DLod",
"texture2DProjLodEXT",
"texture2DProjLod",
"textureCubeLodEXT",
"textureCubeLod",
"texture2DGradEXT",
"texture2DGradARB",
"texture2DProjGradEXT",
"texture2DProjGradARB",
"textureCubeGradEXT",
"textureCubeGradARB",
nullptr,
nullptr};
static const char *legacyToCoreRename[] = {
"texture2D", "texture", "texture2DProj", "textureProj", "texture2DLod", "textureLod",
"texture2DProjLod", "textureProjLod", "texture2DRect", "texture", "texture2DRectProj",
"textureProj", "textureCube", "texture", "textureCubeLod", "textureLod",
// Extensions
"texture2DLodEXT", "textureLod", "texture2DProjLodEXT", "textureProjLod",
"textureCubeLodEXT", "textureLod", "texture2DGradEXT", "textureGrad",
"texture2DProjGradEXT", "textureProjGrad", "textureCubeGradEXT", "textureGrad", "texture3D",
"texture", "texture3DProj", "textureProj", "texture3DLod", "textureLod", "texture3DProjLod",
"textureProjLod", "shadow2DEXT", "texture", "shadow2DProjEXT", "textureProj", nullptr,
nullptr};
const char **mapping =
(sh::IsGLSL130OrNewer(getShaderOutput())) ? legacyToCoreRename : simpleRename;
for (int i = 0; mapping[i] != nullptr; i += 2)
{
if (name == mapping[i])
{
return ImmutableString(mapping[i + 1]);
}
}
return name;
}
} // namespace sh
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