ProgramPipeline.cpp

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Author : Tim Van Patten
Date : 2020-09-21 13:25:46
Hash : 001c7e8c
Message : Vulkan: Link PPO during draw validation From the OpenGL ES 3.1 spec: 11.1.3.11 Validation It is not always possible to determine at link time if a program object can execute successfully, given that LinkProgram can not know the state of the remainder of the pipeline. Therefore validation is done when the first rendering command which triggers shader invocations is issued, to determine if the set of active program objects can be executed. For draws, this CL moves the PPO link operation to ValidateDrawStates() to generate PPO link failures within ANGLE's validation layer, so we fail any rendering commands during command validation. For dispatch, PPOs are linked during Context::prepareForDispatch(), where the PPO is converted from draw to compute, since that conversion requires a re-link. This re-link shouldn't fail due to errors that would have been caught during validation, since the compute shader must have successfully linked before it can be included in the PPO in the first place. We don't re-link when converting back to draw, since it's possible there are validation errors (which we want to catch during validation of the next rendering command). Bug: angleproject:5064 Test: dEQP.GLES31/functional_separate_shader_validation_es31_* Test: ContextNoErrorTest31.DrawWithPPO Test: ProgramPipelineTest31.VerifyPpoLinkErrorSignalledCorrectly Change-Id: Ibb249e893c007a83cc6b813f848a660bfa34ecb0 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2422375 Commit-Queue: Tim Van Patten <timvp@google.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Ian Elliott <ianelliott@google.com>
src/libANGLE/ProgramPipeline.cpp
//
// Copyright 2017 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.
//

// ProgramPipeline.cpp: Implements the gl::ProgramPipeline class.
// Implements GL program pipeline objects and related functionality.
// [OpenGL ES 3.1] section 7.4 page 105.

#include "libANGLE/ProgramPipeline.h"

#include <algorithm>

#include "libANGLE/Context.h"
#include "libANGLE/Program.h"
#include "libANGLE/angletypes.h"
#include "libANGLE/renderer/GLImplFactory.h"
#include "libANGLE/renderer/ProgramPipelineImpl.h"

namespace gl
{

enum SubjectIndexes : angle::SubjectIndex
{
    kExecutableSubjectIndex = 0
};

ProgramPipelineState::ProgramPipelineState()
    : mLabel(),
      mActiveShaderProgram(nullptr),
      mValid(false),
      mExecutable(new ProgramExecutable()),
      mIsLinked(false)
{
    for (const ShaderType shaderType : gl::AllShaderTypes())
    {
        mPrograms[shaderType] = nullptr;
    }
}

ProgramPipelineState::~ProgramPipelineState()
{
    SafeDelete(mExecutable);
}

const std::string &ProgramPipelineState::getLabel() const
{
    return mLabel;
}

void ProgramPipelineState::activeShaderProgram(Program *shaderProgram)
{
    mActiveShaderProgram = shaderProgram;
}

void ProgramPipelineState::useProgramStage(const Context *context,
                                           const ShaderType shaderType,
                                           Program *shaderProgram,
                                           angle::ObserverBinding *programObserverBindings)
{
    Program *oldProgram = mPrograms[shaderType];
    if (oldProgram)
    {
        oldProgram->release(context);
    }

    // If program refers to a program object with a valid shader attached for the indicated shader
    // stage, glUseProgramStages installs the executable code for that stage in the indicated
    // program pipeline object pipeline.
    if (shaderProgram && (shaderProgram->id().value != 0) &&
        shaderProgram->getExecutable().hasLinkedShaderStage(shaderType))
    {
        mPrograms[shaderType] = shaderProgram;
        shaderProgram->addRef();
    }
    else
    {
        // If program is zero, or refers to a program object with no valid shader executable for the
        // given stage, it is as if the pipeline object has no programmable stage configured for the
        // indicated shader stage.
        mPrograms[shaderType] = nullptr;
    }

    Program *program = mPrograms[shaderType];
    programObserverBindings->bind(program);
}

void ProgramPipelineState::useProgramStages(
    const Context *context,
    GLbitfield stages,
    Program *shaderProgram,
    std::vector<angle::ObserverBinding> *programObserverBindings)
{
    if (stages == GL_ALL_SHADER_BITS)
    {
        for (const ShaderType shaderType : gl::AllShaderTypes())
        {
            size_t index = static_cast<size_t>(shaderType);
            ASSERT(index < programObserverBindings->size());
            useProgramStage(context, shaderType, shaderProgram,
                            &programObserverBindings->at(index));
        }
    }
    else
    {
        if (stages & GL_VERTEX_SHADER_BIT)
        {
            size_t index = static_cast<size_t>(ShaderType::Vertex);
            ASSERT(index < programObserverBindings->size());
            useProgramStage(context, ShaderType::Vertex, shaderProgram,
                            &programObserverBindings->at(index));
        }

        if (stages & GL_FRAGMENT_SHADER_BIT)
        {
            size_t index = static_cast<size_t>(ShaderType::Fragment);
            ASSERT(index < programObserverBindings->size());
            useProgramStage(context, ShaderType::Fragment, shaderProgram,
                            &programObserverBindings->at(index));
        }

        if (stages & GL_COMPUTE_SHADER_BIT)
        {
            size_t index = static_cast<size_t>(ShaderType::Compute);
            ASSERT(index < programObserverBindings->size());
            useProgramStage(context, ShaderType::Compute, shaderProgram,
                            &programObserverBindings->at(index));
        }
    }
}

bool ProgramPipelineState::usesShaderProgram(ShaderProgramID programId) const
{
    for (const Program *program : mPrograms)
    {
        if (program && (program->id() == programId))
        {
            return true;
        }
    }

    return false;
}

void ProgramPipelineState::updateExecutableTextures()
{
    for (const ShaderType shaderType : mExecutable->getLinkedShaderStages())
    {
        const Program *program = getShaderProgram(shaderType);
        ASSERT(program);
        mExecutable->setActiveTextureMask(program->getExecutable().getActiveSamplersMask());
        mExecutable->setActiveImagesMask(program->getExecutable().getActiveImagesMask());
        // Updates mActiveSamplerRefCounts, mActiveSamplerTypes, and mActiveSamplerFormats
        mExecutable->updateActiveSamplers(program->getState());
    }
}

ProgramPipeline::ProgramPipeline(rx::GLImplFactory *factory, ProgramPipelineID handle)
    : RefCountObject(factory->generateSerial(), handle),
      mProgramPipelineImpl(factory->createProgramPipeline(mState)),
      mExecutableObserverBinding(this, kExecutableSubjectIndex)
{
    ASSERT(mProgramPipelineImpl);

    for (const ShaderType shaderType : gl::AllShaderTypes())
    {
        mProgramObserverBindings.emplace_back(this, static_cast<angle::SubjectIndex>(shaderType));
    }
    mExecutableObserverBinding.bind(mState.mExecutable);
}

ProgramPipeline::~ProgramPipeline()
{
    mProgramPipelineImpl.release();
}

void ProgramPipeline::onDestroy(const Context *context)
{
    for (Program *program : mState.mPrograms)
    {
        if (program)
        {
            ASSERT(program->getRefCount());
            program->release(context);
        }
    }

    getImplementation()->destroy(context);
}

void ProgramPipeline::setLabel(const Context *context, const std::string &label)
{
    mState.mLabel = label;
}

const std::string &ProgramPipeline::getLabel() const
{
    return mState.mLabel;
}

rx::ProgramPipelineImpl *ProgramPipeline::getImplementation() const
{
    return mProgramPipelineImpl.get();
}

void ProgramPipeline::activeShaderProgram(Program *shaderProgram)
{
    mState.activeShaderProgram(shaderProgram);
}

void ProgramPipeline::useProgramStages(const Context *context,
                                       GLbitfield stages,
                                       Program *shaderProgram)
{
    mState.useProgramStages(context, stages, shaderProgram, &mProgramObserverBindings);
    updateLinkedShaderStages();
    updateExecutable();

    mState.mIsLinked = false;
}

void ProgramPipeline::updateLinkedShaderStages()
{
    mState.mExecutable->resetLinkedShaderStages();

    for (const ShaderType shaderType : gl::AllShaderTypes())
    {
        Program *program = mState.mPrograms[shaderType];
        if (program)
        {
            mState.mExecutable->setLinkedShaderStages(shaderType);
        }
    }

    mState.mExecutable->updateCanDrawWith();
}

void ProgramPipeline::updateExecutableAttributes()
{
    Program *vertexProgram = getShaderProgram(gl::ShaderType::Vertex);

    if (!vertexProgram)
    {
        return;
    }

    const ProgramExecutable &vertexExecutable      = vertexProgram->getExecutable();
    mState.mExecutable->mActiveAttribLocationsMask = vertexExecutable.mActiveAttribLocationsMask;
    mState.mExecutable->mMaxActiveAttribLocation   = vertexExecutable.mMaxActiveAttribLocation;
    mState.mExecutable->mAttributesTypeMask        = vertexExecutable.mAttributesTypeMask;
    mState.mExecutable->mAttributesMask            = vertexExecutable.mAttributesMask;
}

void ProgramPipeline::updateTransformFeedbackMembers()
{
    Program *vertexProgram = getShaderProgram(gl::ShaderType::Vertex);

    if (!vertexProgram)
    {
        return;
    }

    const ProgramExecutable &vertexExecutable     = vertexProgram->getExecutable();
    mState.mExecutable->mTransformFeedbackStrides = vertexExecutable.mTransformFeedbackStrides;
    mState.mExecutable->mLinkedTransformFeedbackVaryings =
        vertexExecutable.mLinkedTransformFeedbackVaryings;
}

void ProgramPipeline::updateShaderStorageBlocks()
{
    mState.mExecutable->mComputeShaderStorageBlocks.clear();
    mState.mExecutable->mGraphicsShaderStorageBlocks.clear();

    // Only copy the storage blocks from each Program in the PPO once, since each Program could
    // contain multiple shader stages.
    ShaderBitSet handledStages;

    for (const gl::ShaderType shaderType : kAllGraphicsShaderTypes)
    {
        const Program *shaderProgram = getShaderProgram(shaderType);
        if (shaderProgram && !handledStages.test(shaderType))
        {
            // Only add each Program's blocks once.
            handledStages |= shaderProgram->getExecutable().getLinkedShaderStages();

            for (const InterfaceBlock &block :
                 shaderProgram->getExecutable().getShaderStorageBlocks())
            {
                mState.mExecutable->mGraphicsShaderStorageBlocks.emplace_back(block);
            }
        }
    }

    const Program *computeProgram = getShaderProgram(ShaderType::Compute);
    if (computeProgram)
    {
        for (const InterfaceBlock &block : computeProgram->getExecutable().getShaderStorageBlocks())
        {
            mState.mExecutable->mComputeShaderStorageBlocks.emplace_back(block);
        }
    }
}

void ProgramPipeline::updateImageBindings()
{
    mState.mExecutable->mComputeImageBindings.clear();
    mState.mExecutable->mGraphicsImageBindings.clear();

    // Only copy the storage blocks from each Program in the PPO once, since each Program could
    // contain multiple shader stages.
    ShaderBitSet handledStages;

    for (const gl::ShaderType shaderType : kAllGraphicsShaderTypes)
    {
        const Program *shaderProgram = getShaderProgram(shaderType);
        if (shaderProgram && !handledStages.test(shaderType))
        {
            // Only add each Program's blocks once.
            handledStages |= shaderProgram->getExecutable().getLinkedShaderStages();

            for (const ImageBinding &imageBinding : shaderProgram->getState().getImageBindings())
            {
                mState.mExecutable->mGraphicsImageBindings.emplace_back(imageBinding);
            }
        }
    }

    const Program *computeProgram = getShaderProgram(ShaderType::Compute);
    if (computeProgram)
    {
        for (const ImageBinding &imageBinding : computeProgram->getState().getImageBindings())
        {
            mState.mExecutable->mComputeImageBindings.emplace_back(imageBinding);
        }
    }
}

void ProgramPipeline::updateHasBooleans()
{
    // Need to check all of the shader stages, not just linked, so we handle Compute correctly.
    for (const gl::ShaderType shaderType : kAllGraphicsShaderTypes)
    {
        const Program *shaderProgram = getShaderProgram(shaderType);
        if (shaderProgram)
        {
            const ProgramExecutable &executable = shaderProgram->getExecutable();

            if (executable.hasUniformBuffers())
            {
                mState.mExecutable->mPipelineHasGraphicsUniformBuffers = true;
            }
            if (executable.hasGraphicsStorageBuffers())
            {
                mState.mExecutable->mPipelineHasGraphicsStorageBuffers = true;
            }
            if (executable.hasAtomicCounterBuffers())
            {
                mState.mExecutable->mPipelineHasGraphicsAtomicCounterBuffers = true;
            }
            if (executable.hasDefaultUniforms())
            {
                mState.mExecutable->mPipelineHasGraphicsDefaultUniforms = true;
            }
            if (executable.hasTextures())
            {
                mState.mExecutable->mPipelineHasGraphicsTextures = true;
            }
            if (executable.hasGraphicsImages())
            {
                mState.mExecutable->mPipelineHasGraphicsImages = true;
            }
        }
    }

    const Program *computeProgram = getShaderProgram(ShaderType::Compute);
    if (computeProgram)
    {
        const ProgramExecutable &executable = computeProgram->getExecutable();

        if (executable.hasUniformBuffers())
        {
            mState.mExecutable->mPipelineHasComputeUniformBuffers = true;
        }
        if (executable.hasComputeStorageBuffers())
        {
            mState.mExecutable->mPipelineHasComputeStorageBuffers = true;
        }
        if (executable.hasAtomicCounterBuffers())
        {
            mState.mExecutable->mPipelineHasComputeAtomicCounterBuffers = true;
        }
        if (executable.hasDefaultUniforms())
        {
            mState.mExecutable->mPipelineHasComputeDefaultUniforms = true;
        }
        if (executable.hasTextures())
        {
            mState.mExecutable->mPipelineHasComputeTextures = true;
        }
        if (executable.hasComputeImages())
        {
            mState.mExecutable->mPipelineHasComputeImages = true;
        }
    }
}

void ProgramPipeline::updateExecutable()
{
    mState.mExecutable->reset();

    // Vertex Shader ProgramExecutable properties
    updateExecutableAttributes();
    updateTransformFeedbackMembers();
    updateShaderStorageBlocks();
    updateImageBindings();

    // All Shader ProgramExecutable properties
    mState.updateExecutableTextures();

    // Must be last, since it queries things updated by earlier functions
    updateHasBooleans();
}

ProgramMergedVaryings ProgramPipeline::getMergedVaryings() const
{
    ASSERT(!mState.mExecutable->isCompute());

    // Varyings are matched between pairs of consecutive stages, by location if assigned or
    // by name otherwise.  Note that it's possible for one stage to specify location and the other
    // not: https://cvs.khronos.org/bugzilla/show_bug.cgi?id=16261

    // Map stages to the previous active stage in the rendering pipeline.  When looking at input
    // varyings of a stage, this is used to find the stage whose output varyings are being linked
    // with them.
    ShaderMap<ShaderType> previousActiveStage;

    // Note that kAllGraphicsShaderTypes is sorted according to the rendering pipeline.
    ShaderType lastActiveStage = ShaderType::InvalidEnum;
    for (ShaderType shaderType : getExecutable().getLinkedShaderStages())
    {
        previousActiveStage[shaderType] = lastActiveStage;

        const Program *program = getShaderProgram(shaderType);
        ASSERT(program);
        lastActiveStage = shaderType;
    }

    // First, go through output varyings and create two maps (one by name, one by location) for
    // faster lookup when matching input varyings.

    ShaderMap<std::map<std::string, size_t>> outputVaryingNameToIndexShaderMap;
    ShaderMap<std::map<int, size_t>> outputVaryingLocationToIndexShaderMap;

    ProgramMergedVaryings merged;

    // Gather output varyings.
    for (ShaderType shaderType : getExecutable().getLinkedShaderStages())
    {
        const Program *program = getShaderProgram(shaderType);
        ASSERT(program);
        Shader *shader = program->getState().getAttachedShader(shaderType);
        ASSERT(shader);

        for (const sh::ShaderVariable &varying : shader->getOutputVaryings())
        {
            merged.push_back({});
            ProgramVaryingRef *ref = &merged.back();

            ref->frontShader      = &varying;
            ref->frontShaderStage = shaderType;

            // Always map by name.  Even if location is provided in this stage, it may not be in the
            // paired stage.
            outputVaryingNameToIndexShaderMap[shaderType][varying.name] = merged.size() - 1;

            // If location is provided, also keep it in a map by location.
            if (varying.location != -1)
            {
                outputVaryingLocationToIndexShaderMap[shaderType][varying.location] =
                    merged.size() - 1;
            }
        }
    }

    // Gather input varyings, and match them with output varyings of the previous stage.
    for (ShaderType shaderType : getExecutable().getLinkedShaderStages())
    {
        const Program *program = getShaderProgram(shaderType);
        ASSERT(program);
        Shader *shader = program->getState().getAttachedShader(shaderType);
        ASSERT(shader);
        ShaderType previousStage = previousActiveStage[shaderType];

        for (const sh::ShaderVariable &varying : shader->getInputVaryings())
        {
            size_t mergedIndex = merged.size();
            if (previousStage != ShaderType::InvalidEnum)
            {
                // If location is provided, see if we can match by location.
                if (varying.location != -1)
                {
                    std::map<int, size_t> outputVaryingLocationToIndex =
                        outputVaryingLocationToIndexShaderMap[previousStage];
                    auto byLocationIter = outputVaryingLocationToIndex.find(varying.location);
                    if (byLocationIter != outputVaryingLocationToIndex.end())
                    {
                        mergedIndex = byLocationIter->second;
                    }
                }

                // If not found, try to match by name.
                if (mergedIndex == merged.size())
                {
                    std::map<std::string, size_t> outputVaryingNameToIndex =
                        outputVaryingNameToIndexShaderMap[previousStage];
                    auto byNameIter = outputVaryingNameToIndex.find(varying.name);
                    if (byNameIter != outputVaryingNameToIndex.end())
                    {
                        mergedIndex = byNameIter->second;
                    }
                }
            }

            // If no previous stage, or not matched by location or name, create a new entry for it.
            if (mergedIndex == merged.size())
            {
                merged.push_back({});
                mergedIndex = merged.size() - 1;
            }

            ProgramVaryingRef *ref = &merged[mergedIndex];

            ref->backShader      = &varying;
            ref->backShaderStage = shaderType;
        }
    }

    return merged;
}

// The attached shaders are checked for linking errors by matching up their variables.
// Uniform, input and output variables get collected.
// The code gets compiled into binaries.
angle::Result ProgramPipeline::link(const Context *context)
{
    if (mState.mIsLinked)
    {
        return angle::Result::Continue;
    }

    ProgramMergedVaryings mergedVaryings;

    if (!getExecutable().isCompute())
    {
        InfoLog &infoLog = mState.mExecutable->getInfoLog();
        infoLog.reset();
        const State &state = context->getState();

        // Map the varyings to the register file
        gl::PackMode packMode = PackMode::ANGLE_RELAXED;
        if (state.getLimitations().noFlexibleVaryingPacking)
        {
            // D3D9 pack mode is strictly more strict than WebGL, so takes priority.
            packMode = PackMode::ANGLE_NON_CONFORMANT_D3D9;
        }
        else if (state.getExtensions().webglCompatibility)
        {
            // In WebGL, we use a slightly different handling for packing variables.
            packMode = PackMode::WEBGL_STRICT;
        }

        if (!linkVaryings(infoLog))
        {
            return angle::Result::Stop;
        }

        gl::ShaderMap<const gl::ProgramState *> programStates;
        fillProgramStateMap(&programStates);
        if (!mState.mExecutable->linkValidateGlobalNames(infoLog, programStates))
        {
            return angle::Result::Stop;
        }

        GLuint maxVaryingVectors =
            static_cast<GLuint>(context->getState().getCaps().maxVaryingVectors);
        VaryingPacking varyingPacking(maxVaryingVectors, packMode);

        mergedVaryings = getMergedVaryings();
        for (ShaderType shaderType : getExecutable().getLinkedShaderStages())
        {
            Program *program = mState.mPrograms[shaderType];
            ASSERT(program);
            program->getExecutable().getResources().varyingPacking.reset();
            ANGLE_TRY(
                program->linkMergedVaryings(context, program->getExecutable(), mergedVaryings));
        }
    }

    ANGLE_TRY(getImplementation()->link(context, mergedVaryings));

    mState.mIsLinked = true;

    return angle::Result::Continue;
}

bool ProgramPipeline::linkVaryings(InfoLog &infoLog) const
{
    ShaderType previousShaderType = ShaderType::InvalidEnum;
    for (ShaderType shaderType : getExecutable().getLinkedShaderStages())
    {
        Program *program = getShaderProgram(shaderType);
        ASSERT(program);
        ProgramExecutable &executable = program->getExecutable();

        if (previousShaderType != ShaderType::InvalidEnum)
        {
            Program *previousProgram = getShaderProgram(previousShaderType);
            ASSERT(previousProgram);
            ProgramExecutable &previousExecutable = previousProgram->getExecutable();

            if (!Program::linkValidateShaderInterfaceMatching(
                    previousExecutable.getLinkedOutputVaryings(previousShaderType),
                    executable.getLinkedInputVaryings(shaderType), previousShaderType, shaderType,
                    previousExecutable.getLinkedShaderVersion(previousShaderType),
                    executable.getLinkedShaderVersion(shaderType), true, infoLog))
            {
                return false;
            }
        }
        previousShaderType = shaderType;
    }

    Program *vertexProgram   = mState.mPrograms[ShaderType::Vertex];
    Program *fragmentProgram = mState.mPrograms[ShaderType::Fragment];
    if (!vertexProgram || !fragmentProgram)
    {
        return false;
    }
    ProgramExecutable &vertexExecutable   = vertexProgram->getExecutable();
    ProgramExecutable &fragmentExecutable = fragmentProgram->getExecutable();
    return Program::linkValidateBuiltInVaryings(
        vertexExecutable.getLinkedOutputVaryings(ShaderType::Vertex),
        fragmentExecutable.getLinkedInputVaryings(ShaderType::Fragment),
        vertexExecutable.getLinkedShaderVersion(ShaderType::Vertex), infoLog);
}

void ProgramPipeline::validate(const gl::Context *context)
{
    const Caps &caps = context->getCaps();
    mState.mValid    = true;
    InfoLog &infoLog = mState.mExecutable->getInfoLog();
    infoLog.reset();

    for (const ShaderType shaderType : mState.mExecutable->getLinkedShaderStages())
    {
        Program *shaderProgram = mState.mPrograms[shaderType];
        if (shaderProgram)
        {
            shaderProgram->resolveLink(context);
            shaderProgram->validate(caps);
            std::string shaderInfoString = shaderProgram->getExecutable().getInfoLogString();
            if (shaderInfoString.length())
            {
                mState.mValid = false;
                infoLog << shaderInfoString << "\n";
                return;
            }
            if (!shaderProgram->isSeparable())
            {
                mState.mValid = false;
                infoLog << GetShaderTypeString(shaderType) << " is not marked separable."
                        << "\n";
                return;
            }
        }
    }

    if (!linkVaryings(infoLog))
    {
        mState.mValid = false;

        for (const ShaderType shaderType : mState.mExecutable->getLinkedShaderStages())
        {
            Program *shaderProgram = mState.mPrograms[shaderType];
            ASSERT(shaderProgram);
            shaderProgram->validate(caps);
            std::string shaderInfoString = shaderProgram->getExecutable().getInfoLogString();
            if (shaderInfoString.length())
            {
                infoLog << shaderInfoString << "\n";
            }
        }
    }
}

bool ProgramPipeline::validateSamplers(InfoLog *infoLog, const Caps &caps)
{
    for (const ShaderType shaderType : gl::AllShaderTypes())
    {
        Program *shaderProgram = mState.mPrograms[shaderType];
        if (shaderProgram && !shaderProgram->validateSamplers(infoLog, caps))
        {
            return false;
        }
    }

    return true;
}

void ProgramPipeline::onSubjectStateChange(angle::SubjectIndex index, angle::SubjectMessage message)
{
    switch (message)
    {
        case angle::SubjectMessage::SubjectChanged:
            mState.mIsLinked = false;
            mState.updateExecutableTextures();
            break;
        default:
            UNREACHABLE();
            break;
    }
}

void ProgramPipeline::fillProgramStateMap(ShaderMap<const ProgramState *> *programStatesOut)
{
    for (ShaderType shaderType : AllShaderTypes())
    {
        (*programStatesOut)[shaderType] = nullptr;

        Program *program = getShaderProgram(shaderType);
        if (program)
        {
            (*programStatesOut)[shaderType] = &program->getState();
        }
    }
}

}  // namespace gl
kc3-lang/angle/src/libANGLE/ProgramPipeline.cpp

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kc3-lang/angle /src/libANGLE/ProgramPipeline.cpp
