VertexArray.cpp

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Author : Jamie Madill
Date : 2018-09-06 15:54:35
Hash : d84b6737
Message : Cache ValidateDrawStates. This improves performance of all draw call validation. The error that should be generated on the draw call is cached in the Context. The cache is updated in several places. Bug: angleproject:2747 Change-Id: I178617623731608e2e7166b53ab6489d8b742ff5 Reviewed-on: https://chromium-review.googlesource.com/1158612 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Reviewed-by: Frank Henigman <fjhenigman@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>
src/libANGLE/VertexArray.cpp
//
// Copyright (c) 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.
//
// Implementation of the state class for mananging GLES 3 Vertex Array Objects.
//

#include "libANGLE/VertexArray.h"
#include "libANGLE/Buffer.h"
#include "libANGLE/Context.h"
#include "libANGLE/renderer/BufferImpl.h"
#include "libANGLE/renderer/GLImplFactory.h"
#include "libANGLE/renderer/VertexArrayImpl.h"

namespace gl
{
namespace
{
bool IsElementArrayBufferSubjectIndex(angle::SubjectIndex subjectIndex)
{
    return (subjectIndex == MAX_VERTEX_ATTRIBS);
}
}  // anonymous namespce

// VertexArrayState implementation.
VertexArrayState::VertexArrayState(size_t maxAttribs, size_t maxAttribBindings)
    : mLabel(), mVertexBindings()
{
    ASSERT(maxAttribs <= maxAttribBindings);

    for (size_t i = 0; i < maxAttribs; i++)
    {
        mVertexAttributes.emplace_back(static_cast<GLuint>(i));
        mVertexBindings.emplace_back(static_cast<GLuint>(i));
    }

    // Initially all attributes start as "client" with no buffer bound.
    mClientMemoryAttribsMask.set();
}

VertexArrayState::~VertexArrayState()
{
}

bool VertexArrayState::hasEnabledNullPointerClientArray() const
{
    return (mNullPointerClientMemoryAttribsMask & mEnabledAttributesMask).any();
}

AttributesMask VertexArrayState::getBindingToAttributesMask(GLuint bindingIndex) const
{
    ASSERT(bindingIndex < MAX_VERTEX_ATTRIB_BINDINGS);
    return mVertexBindings[bindingIndex].getBoundAttributesMask();
}

// Set an attribute using a new binding.
void VertexArrayState::setAttribBinding(size_t attribIndex, GLuint newBindingIndex)
{
    ASSERT(attribIndex < MAX_VERTEX_ATTRIBS && newBindingIndex < MAX_VERTEX_ATTRIB_BINDINGS);

    VertexAttribute &attrib = mVertexAttributes[attribIndex];

    // Update the binding-attribute map.
    const GLuint oldBindingIndex = attrib.bindingIndex;
    ASSERT(oldBindingIndex != newBindingIndex);

    VertexBinding &oldBinding = mVertexBindings[oldBindingIndex];
    VertexBinding &newBinding = mVertexBindings[newBindingIndex];

    ASSERT(oldBinding.getBoundAttributesMask().test(attribIndex) &&
           !newBinding.getBoundAttributesMask().test(attribIndex));

    oldBinding.resetBoundAttribute(attribIndex);
    newBinding.setBoundAttribute(attribIndex);

    // Set the attribute using the new binding.
    attrib.bindingIndex = newBindingIndex;
    attrib.updateCachedElementLimit(newBinding);

    bool isMapped = newBinding.getBuffer().get() && newBinding.getBuffer()->isMapped();
    mCachedMappedArrayBuffers.set(attribIndex, isMapped);
    mCachedEnabledMappedArrayBuffers.set(attribIndex, isMapped && attrib.enabled);
}

// VertexArray implementation.
VertexArray::VertexArray(rx::GLImplFactory *factory,
                         GLuint id,
                         size_t maxAttribs,
                         size_t maxAttribBindings)
    : mId(id),
      mState(maxAttribs, maxAttribBindings),
      mVertexArray(factory->createVertexArray(mState)),
      mElementArrayBufferObserverBinding(this, MAX_VERTEX_ATTRIBS)
{
    for (size_t attribIndex = 0; attribIndex < maxAttribBindings; ++attribIndex)
    {
        mArrayBufferObserverBindings.emplace_back(this, attribIndex);
    }
}

void VertexArray::onDestroy(const Context *context)
{
    bool isBound = context->isCurrentVertexArray(this);
    for (VertexBinding &binding : mState.mVertexBindings)
    {
        binding.setBuffer(context, nullptr, isBound);
    }
    if (isBound && mState.mElementArrayBuffer.get())
        mState.mElementArrayBuffer->onNonTFBindingChanged(context, -1);
    mState.mElementArrayBuffer.set(context, nullptr);
    mVertexArray->destroy(context);
    SafeDelete(mVertexArray);
    delete this;
}

VertexArray::~VertexArray()
{
    ASSERT(!mVertexArray);
}

GLuint VertexArray::id() const
{
    return mId;
}

void VertexArray::setLabel(const std::string &label)
{
    mState.mLabel = label;
}

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

void VertexArray::detachBuffer(const Context *context, GLuint bufferName)
{
    bool isBound = context->isCurrentVertexArray(this);
    for (auto &binding : mState.mVertexBindings)
    {
        if (binding.getBuffer().id() == bufferName)
        {
            binding.setBuffer(context, nullptr, isBound);
        }
    }

    if (mState.mElementArrayBuffer.id() == bufferName)
    {
        if (isBound && mState.mElementArrayBuffer.get())
            mState.mElementArrayBuffer->onNonTFBindingChanged(context, -1);
        mState.mElementArrayBuffer.set(context, nullptr);
    }
}

const VertexAttribute &VertexArray::getVertexAttribute(size_t attribIndex) const
{
    ASSERT(attribIndex < getMaxAttribs());
    return mState.mVertexAttributes[attribIndex];
}

const VertexBinding &VertexArray::getVertexBinding(size_t bindingIndex) const
{
    ASSERT(bindingIndex < getMaxBindings());
    return mState.mVertexBindings[bindingIndex];
}

size_t VertexArray::GetVertexIndexFromDirtyBit(size_t dirtyBit)
{
    static_assert(gl::MAX_VERTEX_ATTRIBS == gl::MAX_VERTEX_ATTRIB_BINDINGS,
                  "The stride of vertex attributes should equal to that of vertex bindings.");
    ASSERT(dirtyBit > DIRTY_BIT_ELEMENT_ARRAY_BUFFER);
    return (dirtyBit - DIRTY_BIT_ATTRIB_0) % gl::MAX_VERTEX_ATTRIBS;
}

void VertexArray::setDirtyAttribBit(size_t attribIndex, DirtyAttribBitType dirtyAttribBit)
{
    mDirtyBits.set(DIRTY_BIT_ATTRIB_0 + attribIndex);
    mDirtyAttribBits[attribIndex].set(dirtyAttribBit);
}

void VertexArray::setDirtyBindingBit(size_t bindingIndex, DirtyBindingBitType dirtyBindingBit)
{
    mDirtyBits.set(DIRTY_BIT_BINDING_0 + bindingIndex);
    mDirtyBindingBits[bindingIndex].set(dirtyBindingBit);
}

void VertexArray::bindVertexBufferImpl(const Context *context,
                                       size_t bindingIndex,
                                       Buffer *boundBuffer,
                                       GLintptr offset,
                                       GLsizei stride)
{
    ASSERT(bindingIndex < getMaxBindings());
    bool isBound = context->isCurrentVertexArray(this);

    VertexBinding *binding = &mState.mVertexBindings[bindingIndex];

    binding->setBuffer(context, boundBuffer, isBound);
    binding->setOffset(offset);
    binding->setStride(stride);

    updateObserverBinding(bindingIndex);
    updateCachedBufferBindingSize(binding);
    updateCachedTransformFeedbackBindingValidation(bindingIndex, boundBuffer);
    updateCachedMappedArrayBuffers(binding);

    // Update client memory attribute pointers. Affects all bound attributes.
    if (boundBuffer)
    {
        mState.mClientMemoryAttribsMask &= ~binding->getBoundAttributesMask();
    }
    else
    {
        mState.mClientMemoryAttribsMask |= binding->getBoundAttributesMask();
    }
}

void VertexArray::bindVertexBuffer(const Context *context,
                                   size_t bindingIndex,
                                   Buffer *boundBuffer,
                                   GLintptr offset,
                                   GLsizei stride)
{
    bindVertexBufferImpl(context, bindingIndex, boundBuffer, offset, stride);
    setDirtyBindingBit(bindingIndex, DIRTY_BINDING_BUFFER);
}

void VertexArray::setVertexAttribBinding(const Context *context,
                                         size_t attribIndex,
                                         GLuint bindingIndex)
{
    ASSERT(attribIndex < getMaxAttribs() && bindingIndex < getMaxBindings());

    if (mState.mVertexAttributes[attribIndex].bindingIndex != bindingIndex)
    {
        // In ES 3.0 contexts, the binding cannot change, hence the code below is unreachable.
        ASSERT(context->getClientVersion() >= ES_3_1);

        mState.setAttribBinding(attribIndex, bindingIndex);

        setDirtyAttribBit(attribIndex, DIRTY_ATTRIB_BINDING);

        // Update client attribs mask.
        bool hasBuffer = mState.mVertexBindings[bindingIndex].getBuffer().get() != nullptr;
        mState.mClientMemoryAttribsMask.set(attribIndex, !hasBuffer);
    }
}

void VertexArray::setVertexBindingDivisor(size_t bindingIndex, GLuint divisor)
{
    ASSERT(bindingIndex < getMaxBindings());

    VertexBinding &binding = mState.mVertexBindings[bindingIndex];

    binding.setDivisor(divisor);
    setDirtyBindingBit(bindingIndex, DIRTY_BINDING_DIVISOR);

    // Trigger updates in all bound attributes.
    for (size_t attribIndex : binding.getBoundAttributesMask())
    {
        mState.mVertexAttributes[attribIndex].updateCachedElementLimit(binding);
    }
}

void VertexArray::setVertexAttribFormatImpl(size_t attribIndex,
                                            GLint size,
                                            GLenum type,
                                            bool normalized,
                                            bool pureInteger,
                                            GLuint relativeOffset)
{
    ASSERT(attribIndex < getMaxAttribs());

    VertexAttribute *attrib = &mState.mVertexAttributes[attribIndex];

    attrib->size           = size;
    attrib->type           = type;
    attrib->normalized     = normalized;
    attrib->pureInteger    = pureInteger;
    attrib->relativeOffset = relativeOffset;
    mState.mVertexAttributesTypeMask.setIndex(GetVertexAttributeBaseType(*attrib), attribIndex);
}

void VertexArray::setVertexAttribFormat(size_t attribIndex,
                                        GLint size,
                                        GLenum type,
                                        bool normalized,
                                        bool pureInteger,
                                        GLuint relativeOffset)
{
    setVertexAttribFormatImpl(attribIndex, size, type, normalized, pureInteger, relativeOffset);
    setDirtyAttribBit(attribIndex, DIRTY_ATTRIB_FORMAT);

    VertexAttribute &attrib = mState.mVertexAttributes[attribIndex];
    attrib.updateCachedElementLimit(mState.mVertexBindings[attrib.bindingIndex]);
}

void VertexArray::setVertexAttribDivisor(const Context *context, size_t attribIndex, GLuint divisor)
{
    ASSERT(attribIndex < getMaxAttribs());

    setVertexAttribBinding(context, attribIndex, static_cast<GLuint>(attribIndex));
    setVertexBindingDivisor(attribIndex, divisor);
}

void VertexArray::enableAttribute(size_t attribIndex, bool enabledState)
{
    ASSERT(attribIndex < getMaxAttribs());

    VertexAttribute &attrib = mState.mVertexAttributes[attribIndex];

    if (mState.mEnabledAttributesMask.test(attribIndex) == enabledState)
    {
        return;
    }

    attrib.enabled = enabledState;

    setDirtyAttribBit(attribIndex, DIRTY_ATTRIB_ENABLED);

    // Update state cache
    mState.mEnabledAttributesMask.set(attribIndex, enabledState);
    mState.mCachedEnabledMappedArrayBuffers =
        mState.mCachedMappedArrayBuffers & mState.mEnabledAttributesMask;
}

void VertexArray::setVertexAttribPointer(const Context *context,
                                         size_t attribIndex,
                                         gl::Buffer *boundBuffer,
                                         GLint size,
                                         GLenum type,
                                         bool normalized,
                                         bool pureInteger,
                                         GLsizei stride,
                                         const void *pointer)
{
    ASSERT(attribIndex < getMaxAttribs());

    GLintptr offset = boundBuffer ? reinterpret_cast<GLintptr>(pointer) : 0;

    setVertexAttribFormatImpl(attribIndex, size, type, normalized, pureInteger, 0);
    setVertexAttribBinding(context, attribIndex, static_cast<GLuint>(attribIndex));

    VertexAttribute &attrib = mState.mVertexAttributes[attribIndex];

    GLsizei effectiveStride =
        stride != 0 ? stride : static_cast<GLsizei>(ComputeVertexAttributeTypeSize(attrib));
    attrib.pointer                 = pointer;
    attrib.vertexAttribArrayStride = stride;

    bindVertexBufferImpl(context, attribIndex, boundBuffer, offset, effectiveStride);

    setDirtyAttribBit(attribIndex, DIRTY_ATTRIB_POINTER);

    mState.mNullPointerClientMemoryAttribsMask.set(attribIndex,
                                                   boundBuffer == nullptr && pointer == nullptr);
}

void VertexArray::setElementArrayBuffer(const Context *context, Buffer *buffer)
{
    ASSERT(context->isCurrentVertexArray(this));
    if (mState.mElementArrayBuffer.get())
    {
        mState.mElementArrayBuffer->onNonTFBindingChanged(context, -1);
    }
    mState.mElementArrayBuffer.set(context, buffer);
    if (buffer)
    {
        mElementArrayBufferObserverBinding.bind(buffer->getImplementation());
        buffer->onNonTFBindingChanged(context, 1);
    }
    else
    {
        mElementArrayBufferObserverBinding.bind(nullptr);
    }
    mDirtyBits.set(DIRTY_BIT_ELEMENT_ARRAY_BUFFER);
}

gl::Error VertexArray::syncState(const Context *context)
{
    if (mDirtyBits.any())
    {
        mDirtyBitsGuard = mDirtyBits;
        ANGLE_TRY(
            mVertexArray->syncState(context, mDirtyBits, mDirtyAttribBits, mDirtyBindingBits));
        mDirtyBits.reset();
        mDirtyBitsGuard.reset();

        // This is a bit of an implementation hack - but since we know the implementation
        // details of the dirty bit class it should always have the same effect as iterating
        // individual attribs. We could also look into schemes where iterating the dirty
        // bit set also resets it as you pass through it.
        memset(&mDirtyAttribBits, 0, sizeof(mDirtyAttribBits));
        memset(&mDirtyBindingBits, 0, sizeof(mDirtyBindingBits));
    }
    return gl::NoError();
}

void VertexArray::onBindingChanged(const Context *context, int incr)
{
    if (mState.mElementArrayBuffer.get())
        mState.mElementArrayBuffer->onNonTFBindingChanged(context, incr);
    for (auto &binding : mState.mVertexBindings)
    {
        binding.onContainerBindingChanged(context, incr);
    }
}

VertexArray::DirtyBitType VertexArray::getDirtyBitFromIndex(bool contentsChanged,
                                                            angle::SubjectIndex index) const
{
    if (IsElementArrayBufferSubjectIndex(index))
    {
        return contentsChanged ? DIRTY_BIT_ELEMENT_ARRAY_BUFFER_DATA
                               : DIRTY_BIT_ELEMENT_ARRAY_BUFFER;
    }
    else
    {
        // Note: this currently just gets the top-level dirty bit.
        ASSERT(index < mArrayBufferObserverBindings.size());
        return static_cast<DirtyBitType>(
            (contentsChanged ? DIRTY_BIT_BUFFER_DATA_0 : DIRTY_BIT_BINDING_0) + index);
    }
}

void VertexArray::onSubjectStateChange(const gl::Context *context,
                                       angle::SubjectIndex index,
                                       angle::SubjectMessage message)
{
    switch (message)
    {
        case angle::SubjectMessage::CONTENTS_CHANGED:
            setDependentDirtyBit(context, true, index);
            break;

        case angle::SubjectMessage::STORAGE_CHANGED:
            if (!IsElementArrayBufferSubjectIndex(index))
            {
                updateCachedBufferBindingSize(&mState.mVertexBindings[index]);
            }
            setDependentDirtyBit(context, false, index);
            break;

        case angle::SubjectMessage::BINDING_CHANGED:
            if (!IsElementArrayBufferSubjectIndex(index))
            {
                const Buffer *buffer = mState.mVertexBindings[index].getBuffer().get();
                updateCachedTransformFeedbackBindingValidation(index, buffer);
            }
            break;

        case angle::SubjectMessage::RESOURCE_MAPPED:
            if (!IsElementArrayBufferSubjectIndex(index))
            {
                updateCachedMappedArrayBuffers(&mState.mVertexBindings[index]);
                onStateChange(context, angle::SubjectMessage::RESOURCE_MAPPED);
            }
            break;

        case angle::SubjectMessage::RESOURCE_UNMAPPED:
            setDependentDirtyBit(context, true, index);

            if (!IsElementArrayBufferSubjectIndex(index))
            {
                updateCachedMappedArrayBuffers(&mState.mVertexBindings[index]);
                onStateChange(context, angle::SubjectMessage::RESOURCE_UNMAPPED);
            }
            break;

        default:
            UNREACHABLE();
            break;
    }
}

void VertexArray::setDependentDirtyBit(const gl::Context *context,
                                       bool contentsChanged,
                                       angle::SubjectIndex index)
{
    DirtyBitType dirtyBit = getDirtyBitFromIndex(contentsChanged, index);
    ASSERT(!mDirtyBitsGuard.valid() || mDirtyBitsGuard.value().test(dirtyBit));
    mDirtyBits.set(dirtyBit);
    onStateChange(context, angle::SubjectMessage::CONTENTS_CHANGED);
}

void VertexArray::updateObserverBinding(size_t bindingIndex)
{
    Buffer *boundBuffer = mState.mVertexBindings[bindingIndex].getBuffer().get();
    mArrayBufferObserverBindings[bindingIndex].bind(boundBuffer ? boundBuffer->getImplementation()
                                                                : nullptr);
}

void VertexArray::updateCachedBufferBindingSize(VertexBinding *binding)
{
    for (size_t boundAttribute : binding->getBoundAttributesMask())
    {
        mState.mVertexAttributes[boundAttribute].updateCachedElementLimit(*binding);
    }
}

void VertexArray::updateCachedTransformFeedbackBindingValidation(size_t bindingIndex,
                                                                 const Buffer *buffer)
{
    const bool hasConflict = buffer && buffer->isBoundForTransformFeedbackAndOtherUse();
    mCachedTransformFeedbackConflictedBindingsMask.set(bindingIndex, hasConflict);
}

bool VertexArray::hasTransformFeedbackBindingConflict(const gl::Context *context) const
{
    // Fast check first.
    if (!mCachedTransformFeedbackConflictedBindingsMask.any())
    {
        return false;
    }

    const AttributesMask &activeAttribues = context->getStateCache().getActiveBufferedAttribsMask();

    // Slow check. We must ensure that the conflicting attributes are enabled/active.
    for (size_t attribIndex : activeAttribues)
    {
        const VertexAttribute &attrib = mState.mVertexAttributes[attribIndex];
        if (mCachedTransformFeedbackConflictedBindingsMask[attrib.bindingIndex])
        {
            return true;
        }
    }

    return false;
}

void VertexArray::updateCachedMappedArrayBuffers(VertexBinding *binding)
{
    Buffer *buffer = binding->getBuffer().get();
    if (buffer && buffer->isMapped())
    {
        mState.mCachedMappedArrayBuffers |= binding->getBoundAttributesMask();
    }
    else
    {
        mState.mCachedMappedArrayBuffers &= ~binding->getBoundAttributesMask();
    }

    mState.mCachedEnabledMappedArrayBuffers =
        mState.mCachedMappedArrayBuffers & mState.mEnabledAttributesMask;
}
}  // namespace gl
kc3-lang/angle/src/libANGLE/VertexArray.cpp

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