Hash :
249cb200
Author :
Date :
2019-12-03T11:10:06
Translator: Rename TIntermInvariantDeclaration to ..GlobalQualifier.. This is to support the upcoming `precise` keyword. Bug: angleproject:3569 Change-Id: Idbcc8fd6f261757dbbf81b381e7a2dae938d8101 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1947451 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>
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//
// Copyright (c) 2019 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.
//
// TOutputVulkanGLSLForMetal:
// This is a special version Vulkan GLSL output that will make some special
// considerations for Metal backend limitations.
//
#include "compiler/translator/OutputVulkanGLSLForMetal.h"
#include "common/apple_platform_utils.h"
#include "compiler/translator/BaseTypes.h"
#include "compiler/translator/Symbol.h"
#include "compiler/translator/util.h"
namespace sh
{
namespace
{
bool gOverrideRemoveInvariant = false;
bool ShoudRemoveInvariant(const TType &type)
{
if (gOverrideRemoveInvariant)
{
return true;
}
if (type.getQualifier() != EvqPosition)
{
// Metal only supports invariant for gl_Position
return true;
}
if (ANGLE_APPLE_AVAILABLE_XCI(10.14, 13.0, 12))
{
return false;
}
else
{
// Metal 2.1 is not available, so we need to remove "invariant" keyword
return true;
}
}
}
// static
void TOutputVulkanGLSLForMetal::RemoveInvariantForTest(bool remove)
{
gOverrideRemoveInvariant = remove;
}
TOutputVulkanGLSLForMetal::TOutputVulkanGLSLForMetal(TInfoSinkBase &objSink,
ShArrayIndexClampingStrategy clampingStrategy,
ShHashFunction64 hashFunction,
NameMap &nameMap,
TSymbolTable *symbolTable,
sh::GLenum shaderType,
int shaderVersion,
ShShaderOutput output,
ShCompileOptions compileOptions)
: TOutputVulkanGLSL(objSink,
clampingStrategy,
hashFunction,
nameMap,
symbolTable,
shaderType,
shaderVersion,
output,
compileOptions)
{}
void TOutputVulkanGLSLForMetal::writeVariableType(const TType &type, const TSymbol *symbol)
{
TType overrideType(type);
// Remove invariant keyword if required.
if (type.isInvariant() && ShoudRemoveInvariant(type))
{
overrideType.setInvariant(false);
}
TOutputVulkanGLSL::writeVariableType(overrideType, symbol);
}
bool TOutputVulkanGLSLForMetal::visitGlobalQualifierDeclaration(
Visit visit,
TIntermGlobalQualifierDeclaration *node)
{
TInfoSinkBase &out = objSink();
ASSERT(visit == PreVisit);
const TIntermSymbol *symbol = node->getSymbol();
if (!ShoudRemoveInvariant(symbol->getType()))
{
out << "invariant ";
}
out << hashName(&symbol->variable());
return false;
}
} // namespace sh