ExtensionGLSL.cpp

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Author : Jamie Madill
Date : 2016-11-07 13:58:48
Hash : 45bcc784
Message : translator: Scope all classes with "sh". I was seeing an odd problem with our PoolAlloc conflicting with the glslang/Vulkan TIntermNode, so the fix was to move everything to a separate namespace. The bison grammars are also regenerated. No functional changes. BUG=angleproject:1576 Change-Id: I959c7afe4c092f0d458432c07b4dcee4d39513f3 Reviewed-on: https://chromium-review.googlesource.com/408267 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>

src/compiler/translator/ExtensionGLSL.cpp

//
// Copyright (c) 2015 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.
//
// ExtensionGLSL.cpp: Implements the TExtensionGLSL class that tracks GLSL extension requirements
// of shaders.

#include "compiler/translator/ExtensionGLSL.h"

#include "compiler/translator/VersionGLSL.h"

namespace sh
{

TExtensionGLSL::TExtensionGLSL(ShShaderOutput output)
    : TIntermTraverser(true, false, false), mTargetVersion(ShaderOutputTypeToGLSLVersion(output))
{
}

const std::set<std::string> &TExtensionGLSL::getEnabledExtensions() const
{
    return mEnabledExtensions;
}

const std::set<std::string> &TExtensionGLSL::getRequiredExtensions() const
{
    return mRequiredExtensions;
}

bool TExtensionGLSL::visitUnary(Visit, TIntermUnary *node)
{
    checkOperator(node);

    return true;
}

bool TExtensionGLSL::visitAggregate(Visit, TIntermAggregate *node)
{
    checkOperator(node);

    return true;
}

void TExtensionGLSL::checkOperator(TIntermOperator *node)
{
    if (mTargetVersion < GLSL_VERSION_130)
    {
        return;
    }

    switch (node->getOp())
    {
        case EOpAbs:
            break;

        case EOpSign:
            break;

        case EOpMix:
            break;

        case EOpFloatBitsToInt:
        case EOpFloatBitsToUint:
        case EOpIntBitsToFloat:
        case EOpUintBitsToFloat:
            if (mTargetVersion < GLSL_VERSION_330)
            {
                // Bit conversion functions cannot be emulated.
                mRequiredExtensions.insert("GL_ARB_shader_bit_encoding");
            }
            break;

        case EOpPackSnorm2x16:
        case EOpPackHalf2x16:
        case EOpUnpackSnorm2x16:
        case EOpUnpackHalf2x16:
            if (mTargetVersion < GLSL_VERSION_420)
            {
                mEnabledExtensions.insert("GL_ARB_shading_language_packing");

                if (mTargetVersion < GLSL_VERSION_330)
                {
                    // floatBitsToUint and uintBitsToFloat are needed to emulate
                    // packHalf2x16 and unpackHalf2x16 respectively and cannot be
                    // emulated themselves.
                    mRequiredExtensions.insert("GL_ARB_shader_bit_encoding");
                }
            }
            break;

        case EOpPackUnorm2x16:
        case EOpUnpackUnorm2x16:
            if (mTargetVersion < GLSL_VERSION_410)
            {
                mEnabledExtensions.insert("GL_ARB_shading_language_packing");
            }
            break;

        default:
            break;
    }
}

}  // namespace sh

kc3-lang/angle/src/compiler/translator/ExtensionGLSL.cpp

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kc3-lang/angle /src/compiler/translator/ExtensionGLSL.cpp