TransformFeedback.cpp

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Author : Jamie Madill
Date : 2017-06-20 12:57:39
Hash : 4928b7ca
Message : Proliferate gl::Context everywhere. This gives the D3D back-end access to the GL state almost anywhere. This uses the onDestroy hook for Textures to push errors up from destructors, although they still don't quite make it to the Context. There are places, such as in EGL object (Context/Surface) destruction, where we end up calling through to GL implementation internals without having access to a gl::Context. We handle this via a proxy Context to a Display, basically a null context, that has access to impl-side state like the Renderer pointer if necessary. It does not have access to the normal GL state. Also Pass gl::Context to RefCountObject::release(). Since we're using destroy() methods now, we should not ever call the destructor directly. BUG=angleproject:1156 Change-Id: Ie4c32ad6bf6caaff0289901f30b5c6bafa2ce259 Reviewed-on: https://chromium-review.googlesource.com/529707 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>

src/libANGLE/TransformFeedback.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.
//

#include "libANGLE/TransformFeedback.h"

#include "libANGLE/Buffer.h"
#include "libANGLE/Caps.h"
#include "libANGLE/ContextState.h"
#include "libANGLE/Program.h"
#include "libANGLE/renderer/GLImplFactory.h"
#include "libANGLE/renderer/TransformFeedbackImpl.h"

namespace gl
{

TransformFeedbackState::TransformFeedbackState(size_t maxIndexedBuffers)
    : mLabel(),
      mActive(false),
      mPrimitiveMode(GL_NONE),
      mPaused(false),
      mProgram(nullptr),
      mGenericBuffer(),
      mIndexedBuffers(maxIndexedBuffers)
{
}

const BindingPointer<Buffer> &TransformFeedbackState::getGenericBuffer() const
{
    return mGenericBuffer;
}

const OffsetBindingPointer<Buffer> &TransformFeedbackState::getIndexedBuffer(size_t idx) const
{
    return mIndexedBuffers[idx];
}

const std::vector<OffsetBindingPointer<Buffer>> &TransformFeedbackState::getIndexedBuffers() const
{
    return mIndexedBuffers;
}

TransformFeedback::TransformFeedback(rx::GLImplFactory *implFactory, GLuint id, const Caps &caps)
    : RefCountObject(id),
      mState(caps.maxTransformFeedbackSeparateAttributes),
      mImplementation(implFactory->createTransformFeedback(mState))
{
    ASSERT(mImplementation != nullptr);
}

void TransformFeedback::onDestroy(const Context *context)
{
    if (mState.mProgram)
    {
        mState.mProgram->release(context);
        mState.mProgram = nullptr;
    }

    ASSERT(!mState.mProgram);
    mState.mGenericBuffer.set(context, nullptr);
    for (size_t i = 0; i < mState.mIndexedBuffers.size(); i++)
    {
        mState.mIndexedBuffers[i].set(context, nullptr);
    }

    SafeDelete(mImplementation);
}

TransformFeedback::~TransformFeedback()
{
}

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

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

void TransformFeedback::begin(const Context *context, GLenum primitiveMode, Program *program)
{
    mState.mActive        = true;
    mState.mPrimitiveMode = primitiveMode;
    mState.mPaused        = false;
    mImplementation->begin(primitiveMode);
    bindProgram(context, program);
}

void TransformFeedback::end(const Context *context)
{
    mState.mActive        = false;
    mState.mPrimitiveMode = GL_NONE;
    mState.mPaused        = false;
    mImplementation->end();
    if (mState.mProgram)
    {
        mState.mProgram->release(context);
        mState.mProgram = nullptr;
    }
}

void TransformFeedback::pause()
{
    mState.mPaused = true;
    mImplementation->pause();
}

void TransformFeedback::resume()
{
    mState.mPaused = false;
    mImplementation->resume();
}

bool TransformFeedback::isActive() const
{
    return mState.mActive;
}

bool TransformFeedback::isPaused() const
{
    return mState.mPaused;
}

GLenum TransformFeedback::getPrimitiveMode() const
{
    return mState.mPrimitiveMode;
}

void TransformFeedback::bindProgram(const Context *context, Program *program)
{
    if (mState.mProgram != program)
    {
        if (mState.mProgram != nullptr)
        {
            mState.mProgram->release(context);
        }
        mState.mProgram = program;
        if (mState.mProgram != nullptr)
        {
            mState.mProgram->addRef();
        }
    }
}

bool TransformFeedback::hasBoundProgram(GLuint program) const
{
    return mState.mProgram != nullptr && mState.mProgram->id() == program;
}

void TransformFeedback::bindGenericBuffer(const Context *context, Buffer *buffer)
{
    mState.mGenericBuffer.set(context, buffer);
    mImplementation->bindGenericBuffer(mState.mGenericBuffer);
}

void TransformFeedback::detachBuffer(const Context *context, GLuint bufferName)
{
    for (size_t index = 0; index < mState.mIndexedBuffers.size(); index++)
    {
        if (mState.mIndexedBuffers[index].id() == bufferName)
        {
            mState.mIndexedBuffers[index].set(context, nullptr);
            mImplementation->bindIndexedBuffer(index, mState.mIndexedBuffers[index]);
        }
    }

    if (mState.mGenericBuffer.id() == bufferName)
    {
        mState.mGenericBuffer.set(context, nullptr);
        mImplementation->bindGenericBuffer(mState.mGenericBuffer);
    }
}

const BindingPointer<Buffer> &TransformFeedback::getGenericBuffer() const
{
    return mState.mGenericBuffer;
}

void TransformFeedback::bindIndexedBuffer(const Context *context,
                                          size_t index,
                                          Buffer *buffer,
                                          size_t offset,
                                          size_t size)
{
    ASSERT(index < mState.mIndexedBuffers.size());
    mState.mIndexedBuffers[index].set(context, buffer, offset, size);
    mImplementation->bindIndexedBuffer(index, mState.mIndexedBuffers[index]);
}

const OffsetBindingPointer<Buffer> &TransformFeedback::getIndexedBuffer(size_t index) const
{
    ASSERT(index < mState.mIndexedBuffers.size());
    return mState.mIndexedBuffers[index];
}

size_t TransformFeedback::getIndexedBufferCount() const
{
    return mState.mIndexedBuffers.size();
}

rx::TransformFeedbackImpl *TransformFeedback::getImplementation()
{
    return mImplementation;
}

const rx::TransformFeedbackImpl *TransformFeedback::getImplementation() const
{
    return mImplementation;
}

}

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

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