blocklayoutHLSL.cpp

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Author : Stuart Morgan
Date : 2019-08-14 12:25:12
Hash : 9d737966
Message : Standardize copyright notices to project style For all "ANGLE Project" copyrights, standardize to the format specified by the style guide. Changes: - "Copyright (c)" and "Copyright(c)" changed to just "Copyright". - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1"). - Fixed a small number of files that had no copyright date using the initial commit year from the version control history. - Fixed one instance of copyright being "The ANGLE Project" rather than "The ANGLE Project Authors" These changes are applied both to the copyright of source file, and where applicable to copyright statements that are generated by templates. BUG=angleproject:3811 Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

src/compiler/translator/blocklayoutHLSL.cpp

//
// Copyright 2013 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.
//
// blocklayout.cpp:
//   Implementation for block layout classes and methods.
//

#include "compiler/translator/blocklayoutHLSL.h"

#include "common/mathutil.h"
#include "common/utilities.h"

namespace sh
{

HLSLBlockEncoder::HLSLBlockEncoder(HLSLBlockEncoderStrategy strategy, bool transposeMatrices)
    : mEncoderStrategy(strategy), mTransposeMatrices(transposeMatrices)
{}

void HLSLBlockEncoder::enterAggregateType(const ShaderVariable &structVar)
{
    align(kComponentsPerRegister);
}

void HLSLBlockEncoder::exitAggregateType(const ShaderVariable &structVar) {}

void HLSLBlockEncoder::getBlockLayoutInfo(GLenum typeIn,
                                          const std::vector<unsigned int> &arraySizes,
                                          bool isRowMajorMatrix,
                                          int *arrayStrideOut,
                                          int *matrixStrideOut)
{
    GLenum type = (mTransposeMatrices ? gl::TransposeMatrixType(typeIn) : typeIn);

    // We assume we are only dealing with 4 byte components (no doubles or half-words currently)
    ASSERT(gl::VariableComponentSize(gl::VariableComponentType(type)) == kBytesPerComponent);

    int matrixStride = 0;
    int arrayStride  = 0;

    // if variables are not to be packed, or we're about to
    // pack a matrix or array, skip to the start of the next
    // register
    if (!isPacked() || gl::IsMatrixType(type) || !arraySizes.empty())
    {
        align(kComponentsPerRegister);
    }

    if (gl::IsMatrixType(type))
    {
        matrixStride = kComponentsPerRegister;

        if (!arraySizes.empty())
        {
            const int numRegisters = gl::MatrixRegisterCount(type, isRowMajorMatrix);
            arrayStride            = kComponentsPerRegister * numRegisters;
        }
    }
    else if (!arraySizes.empty())
    {
        arrayStride = kComponentsPerRegister;
    }
    else if (isPacked())
    {
        int numComponents = gl::VariableComponentCount(type);
        if ((numComponents + (mCurrentOffset % kComponentsPerRegister)) > kComponentsPerRegister)
        {
            align(kComponentsPerRegister);
        }
    }

    *matrixStrideOut = matrixStride;
    *arrayStrideOut  = arrayStride;
}

void HLSLBlockEncoder::advanceOffset(GLenum typeIn,
                                     const std::vector<unsigned int> &arraySizes,
                                     bool isRowMajorMatrix,
                                     int arrayStride,
                                     int matrixStride)
{
    GLenum type = (mTransposeMatrices ? gl::TransposeMatrixType(typeIn) : typeIn);

    if (!arraySizes.empty())
    {
        unsigned int arraySize = gl::ArraySizeProduct(arraySizes);
        if (arraySize > 0)
        {
            mCurrentOffset += arrayStride * (arraySize - 1);
        }
    }

    if (gl::IsMatrixType(type))
    {
        ASSERT(matrixStride == kComponentsPerRegister);
        const int numRegisters  = gl::MatrixRegisterCount(type, isRowMajorMatrix);
        const int numComponents = gl::MatrixComponentCount(type, isRowMajorMatrix);
        mCurrentOffset += kComponentsPerRegister * (numRegisters - 1);
        mCurrentOffset += numComponents;
    }
    else if (isPacked())
    {
        mCurrentOffset += gl::VariableComponentCount(type);
    }
    else
    {
        mCurrentOffset += kComponentsPerRegister;
    }
}

void HLSLBlockEncoder::skipRegisters(unsigned int numRegisters)
{
    mCurrentOffset += (numRegisters * kComponentsPerRegister);
}

HLSLBlockEncoder::HLSLBlockEncoderStrategy HLSLBlockEncoder::GetStrategyFor(
    ShShaderOutput outputType)
{
    switch (outputType)
    {
        case SH_HLSL_3_0_OUTPUT:
            return ENCODE_LOOSE;
        case SH_HLSL_4_1_OUTPUT:
        case SH_HLSL_4_0_FL9_3_OUTPUT:
            return ENCODE_PACKED;
        default:
            UNREACHABLE();
            return ENCODE_PACKED;
    }
}

template <class ShaderVarType>
void HLSLVariableRegisterCount(const ShaderVarType &variable, HLSLBlockEncoder *encoder)
{
    if (variable.isStruct())
    {
        for (size_t arrayElement = 0; arrayElement < variable.getArraySizeProduct(); arrayElement++)
        {
            encoder->enterAggregateType(variable);

            for (const ShaderVariable &field : variable.fields)
            {
                HLSLVariableRegisterCount(field, encoder);
            }

            encoder->exitAggregateType(variable);
        }
    }
    else
    {
        // We operate only on varyings and uniforms, which do not have matrix layout qualifiers
        encoder->encodeType(variable.type, variable.arraySizes, false);
    }
}

unsigned int HLSLVariableRegisterCount(const Uniform &variable, ShShaderOutput outputType)
{
    HLSLBlockEncoder encoder(HLSLBlockEncoder::GetStrategyFor(outputType), true);
    HLSLVariableRegisterCount(variable, &encoder);

    const size_t registerBytes = (encoder.kBytesPerComponent * encoder.kComponentsPerRegister);
    return static_cast<unsigned int>(
        rx::roundUp<size_t>(encoder.getCurrentOffset(), registerBytes) / registerBytes);
}
}  // namespace sh

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

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