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

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  • Author : Daniel Bratell
    Date : 2015-02-25 14:34:49
    Hash : 73941deb
    Message : Disable the HLSL code in Angle if it is not being used. We're only using the HLSL code in Windows so it's not necessary to compile and distribute it on other platforms. This adds a defined ANGLE_ENABLE_HLSL that can be checked in files that are used by non-HLSL code as well. Mostly the HLSL code is just not include by the build system. Details of the space savings (heavily truncated) Total change: -165717 bytes =========================== -606 - Source: angle/src/common/utilities.cpp -627 - Source: angle/src/compiler/translator/FlagStd140Structs.cpp -695 - Source: /usr/include/c++/4.8/bits/stl_algo.h -710 - Source: angle/src/compiler/translator/TranslatorHLSL.cpp -713 - Source: angle/src/compiler/translator/IntermNode.h -863 - Source: /usr/include/c++/4.8/bits/stl_map.h -935 - Source: angle/src/compiler/translator/blocklayout.cpp -1515 - Source: angle/src/compiler/translator/BuiltInFunctionEmulator.cpp -1655 - Source: angle/src/compiler/translator/UnfoldShortCircuit.cpp -2375 - Source: /usr/include/c++/4.8/bits/vector.tcc -3135 - Source: angle/src/compiler/translator/RewriteElseBlocks.cpp -4656 - Source: angle/src/compiler/translator/UtilsHLSL.cpp -5265 - Source: angle/src/compiler/translator/BuiltInFunctionEmulatorHLSL.cpp -6505 - Source: /usr/include/c++/4.8/bits/stl_tree.h -11480 - Source: angle/src/compiler/translator/UniformHLSL.cpp -13580 - Source: angle/src/compiler/translator/StructureHLSL.cpp -18964 - Source: ?? (constant strings and a few vtbls) -89332 - Source: angle/src/compiler/translator/OutputHLSL.cpp Change-Id: I23ccc98abd0a21f847dd34f9482800b3ba679d56 Reviewed-on: https://chromium-review.googlesource.com/251528 Tested-by: bratell at Opera <bratell@opera.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>

  • src/compiler/translator/UniformHLSL.cpp 
  • //
// Copyright (c) 2014 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.
//
// UniformHLSL.cpp:
//   Methods for GLSL to HLSL translation for uniforms and interface blocks.
//

#include "compiler/translator/UniformHLSL.h"

#include "common/utilities.h"
#include "compiler/translator/StructureHLSL.h"
#include "compiler/translator/UtilsHLSL.h"
#include "compiler/translator/blocklayoutHLSL.h"
#include "compiler/translator/util.h"

namespace sh
{

static const char *UniformRegisterPrefix(const TType &type)
{
    if (IsSampler(type.getBasicType()))
    {
        return "s";
    }
    else
    {
        return "c";
    }
}

static TString InterfaceBlockFieldTypeString(const TField &field, TLayoutBlockStorage blockStorage)
{
    const TType &fieldType = *field.type();
    const TLayoutMatrixPacking matrixPacking = fieldType.getLayoutQualifier().matrixPacking;
    ASSERT(matrixPacking != EmpUnspecified);
    TStructure *structure = fieldType.getStruct();

    if (fieldType.isMatrix())
    {
        // Use HLSL row-major packing for GLSL column-major matrices
        const TString &matrixPackString = (matrixPacking == EmpRowMajor ? "column_major" : "row_major");
        return matrixPackString + " " + TypeString(fieldType);
    }
    else if (structure)
    {
        // Use HLSL row-major packing for GLSL column-major matrices
        return QualifiedStructNameString(*structure, matrixPacking == EmpColumnMajor,
            blockStorage == EbsStd140);
    }
    else
    {
        return TypeString(fieldType);
    }
}

static TString InterfaceBlockStructName(const TInterfaceBlock &interfaceBlock)
{
    return DecoratePrivate(interfaceBlock.name()) + "_type";
}

UniformHLSL::UniformHLSL(StructureHLSL *structureHLSL, ShShaderOutput outputType, const std::vector<Uniform> &uniforms)
    : mUniformRegister(0),
      mInterfaceBlockRegister(0),
      mSamplerRegister(0),
      mStructureHLSL(structureHLSL),
      mOutputType(outputType),
      mUniforms(uniforms)
{}

void UniformHLSL::reserveUniformRegisters(unsigned int registerCount)
{
    mUniformRegister = registerCount;
}

void UniformHLSL::reserveInterfaceBlockRegisters(unsigned int registerCount)
{
    mInterfaceBlockRegister = registerCount;
}

const Uniform *UniformHLSL::findUniformByName(const TString &name) const
{
    for (size_t uniformIndex = 0; uniformIndex < mUniforms.size(); ++uniformIndex)
    {
        if (mUniforms[uniformIndex].name == name.c_str())
        {
            return &mUniforms[uniformIndex];
        }
    }

    UNREACHABLE();
    return NULL;
}

unsigned int UniformHLSL::declareUniformAndAssignRegister(const TType &type, const TString &name)
{
    unsigned int registerIndex = (IsSampler(type.getBasicType()) ? mSamplerRegister : mUniformRegister);

    const Uniform *uniform = findUniformByName(name);
    ASSERT(uniform);

    mUniformRegisterMap[uniform->name] = registerIndex;

    unsigned int registerCount = HLSLVariableRegisterCount(*uniform, mOutputType);

    if (gl::IsSamplerType(uniform->type))
    {
        mSamplerRegister += registerCount;
    }
    else
    {
        mUniformRegister += registerCount;
    }

    return registerIndex;
}

TString UniformHLSL::uniformsHeader(ShShaderOutput outputType, const ReferencedSymbols &referencedUniforms)
{
    TString uniforms;

    for (ReferencedSymbols::const_iterator uniformIt = referencedUniforms.begin();
         uniformIt != referencedUniforms.end(); uniformIt++)
    {
        const TIntermSymbol &uniform = *uniformIt->second;
        const TType &type = uniform.getType();
        const TString &name = uniform.getSymbol();

        unsigned int registerIndex = declareUniformAndAssignRegister(type, name);

        if (outputType == SH_HLSL11_OUTPUT && IsSampler(type.getBasicType()))   // Also declare the texture
        {
            uniforms += "uniform " + SamplerString(type) + " sampler_" + DecorateUniform(name, type) + ArrayString(type) +
                        " : register(s" + str(registerIndex) + ");\n";

            uniforms += "uniform " + TextureString(type) + " texture_" + DecorateUniform(name, type) + ArrayString(type) +
                        " : register(t" + str(registerIndex) + ");\n";
        }
        else
        {
            const TStructure *structure = type.getStruct();
            // If this is a nameless struct, we need to use its full definition, rather than its (empty) name.
            // TypeString() will invoke defineNameless in this case; qualifier prefixes are unnecessary for 
            // nameless structs in ES, as nameless structs cannot be used anywhere that layout qualifiers are
            // permitted.
            const TString &typeName = ((structure && !structure->name().empty()) ?
                                        QualifiedStructNameString(*structure, false, false) : TypeString(type));

            const TString &registerString = TString("register(") + UniformRegisterPrefix(type) + str(registerIndex) + ")";

            uniforms += "uniform " + typeName + " " + DecorateUniform(name, type) + ArrayString(type) + " : " + registerString + ";\n";
        }
    }

    return (uniforms.empty() ? "" : ("// Uniforms\n\n" + uniforms));
}

TString UniformHLSL::interfaceBlocksHeader(const ReferencedSymbols &referencedInterfaceBlocks)
{
    TString interfaceBlocks;

    for (ReferencedSymbols::const_iterator interfaceBlockIt = referencedInterfaceBlocks.begin();
         interfaceBlockIt != referencedInterfaceBlocks.end(); interfaceBlockIt++)
    {
        const TType &nodeType = interfaceBlockIt->second->getType();
        const TInterfaceBlock &interfaceBlock = *nodeType.getInterfaceBlock();

        unsigned int arraySize = static_cast<unsigned int>(interfaceBlock.arraySize());
        unsigned int activeRegister = mInterfaceBlockRegister;

        mInterfaceBlockRegisterMap[interfaceBlock.name().c_str()] = activeRegister;
        mInterfaceBlockRegister += std::max(1u, arraySize);

        // FIXME: interface block field names

        if (interfaceBlock.hasInstanceName())
        {
            interfaceBlocks += interfaceBlockStructString(interfaceBlock);
        }

        if (arraySize > 0)
        {
            for (unsigned int arrayIndex = 0; arrayIndex < arraySize; arrayIndex++)
            {
                interfaceBlocks += interfaceBlockString(interfaceBlock, activeRegister + arrayIndex, arrayIndex);
            }
        }
        else
        {
            interfaceBlocks += interfaceBlockString(interfaceBlock, activeRegister, GL_INVALID_INDEX);
        }
    }

    return (interfaceBlocks.empty() ? "" : ("// Interface Blocks\n\n" + interfaceBlocks));
}

TString UniformHLSL::interfaceBlockString(const TInterfaceBlock &interfaceBlock, unsigned int registerIndex, unsigned int arrayIndex)
{
    const TString &arrayIndexString =  (arrayIndex != GL_INVALID_INDEX ? Decorate(str(arrayIndex)) : "");
    const TString &blockName = interfaceBlock.name() + arrayIndexString;
    TString hlsl;

    hlsl += "cbuffer " + blockName + " : register(b" + str(registerIndex) + ")\n"
            "{\n";

    if (interfaceBlock.hasInstanceName())
    {
        hlsl += "    " + InterfaceBlockStructName(interfaceBlock) + " " +
                interfaceBlockInstanceString(interfaceBlock, arrayIndex) + ";\n";
    }
    else
    {
        const TLayoutBlockStorage blockStorage = interfaceBlock.blockStorage();
        hlsl += interfaceBlockMembersString(interfaceBlock, blockStorage);
    }

    hlsl += "};\n\n";

    return hlsl;
}

TString UniformHLSL::interfaceBlockInstanceString(const TInterfaceBlock& interfaceBlock, unsigned int arrayIndex)
{
    if (!interfaceBlock.hasInstanceName())
    {
        return "";
    }
    else if (interfaceBlock.isArray())
    {
        return DecoratePrivate(interfaceBlock.instanceName()) + "_" + str(arrayIndex);
    }
    else
    {
        return Decorate(interfaceBlock.instanceName());
    }
}

TString UniformHLSL::interfaceBlockMembersString(const TInterfaceBlock &interfaceBlock, TLayoutBlockStorage blockStorage)
{
    TString hlsl;

    Std140PaddingHelper padHelper = mStructureHLSL->getPaddingHelper();

    for (unsigned int typeIndex = 0; typeIndex < interfaceBlock.fields().size(); typeIndex++)
    {
        const TField &field = *interfaceBlock.fields()[typeIndex];
        const TType &fieldType = *field.type();

        if (blockStorage == EbsStd140)
        {
            // 2 and 3 component vector types in some cases need pre-padding
            hlsl += padHelper.prePaddingString(fieldType);
        }

        hlsl += "    " + InterfaceBlockFieldTypeString(field, blockStorage) +
                " " + Decorate(field.name()) + ArrayString(fieldType) + ";\n";

        // must pad out after matrices and arrays, where HLSL usually allows itself room to pack stuff
        if (blockStorage == EbsStd140)
        {
            const bool useHLSLRowMajorPacking = (fieldType.getLayoutQualifier().matrixPacking == EmpColumnMajor);
            hlsl += padHelper.postPaddingString(fieldType, useHLSLRowMajorPacking);
        }
    }

    return hlsl;
}

TString UniformHLSL::interfaceBlockStructString(const TInterfaceBlock &interfaceBlock)
{
    const TLayoutBlockStorage blockStorage = interfaceBlock.blockStorage();

    return "struct " + InterfaceBlockStructName(interfaceBlock) + "\n"
           "{\n" +
           interfaceBlockMembersString(interfaceBlock, blockStorage) +
           "};\n\n";
}

}