FramebufferAttachment.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/FramebufferAttachment.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.
//

// FramebufferAttachment.cpp: the gl::FramebufferAttachment class and its derived classes
// objects and related functionality. [OpenGL ES 2.0.24] section 4.4.3 page 108.

#include "libANGLE/FramebufferAttachment.h"

#include "common/utilities.h"
#include "libANGLE/Config.h"
#include "libANGLE/Renderbuffer.h"
#include "libANGLE/Surface.h"
#include "libANGLE/Texture.h"
#include "libANGLE/formatutils.h"
#include "libANGLE/renderer/FramebufferImpl.h"
#include "libANGLE/renderer/FramebufferAttachmentObjectImpl.h"

namespace gl
{

////// FramebufferAttachment::Target Implementation //////

FramebufferAttachment::Target::Target()
    : mBinding(GL_NONE),
      mTextureIndex(ImageIndex::MakeInvalid())
{
}

FramebufferAttachment::Target::Target(GLenum binding, const ImageIndex &imageIndex)
    : mBinding(binding),
      mTextureIndex(imageIndex)
{
}

FramebufferAttachment::Target::Target(const Target &other)
    : mBinding(other.mBinding),
      mTextureIndex(other.mTextureIndex)
{
}

FramebufferAttachment::Target &FramebufferAttachment::Target::operator=(const Target &other)
{
    this->mBinding = other.mBinding;
    this->mTextureIndex = other.mTextureIndex;
    return *this;
}

////// FramebufferAttachment Implementation //////

FramebufferAttachment::FramebufferAttachment()
    : mType(GL_NONE), mResource(nullptr)
{
}

FramebufferAttachment::FramebufferAttachment(const Context *context,
                                             GLenum type,
                                             GLenum binding,
                                             const ImageIndex &textureIndex,
                                             FramebufferAttachmentObject *resource)
    : mResource(nullptr)
{
    attach(context, type, binding, textureIndex, resource);
}

FramebufferAttachment::FramebufferAttachment(FramebufferAttachment &&other)
    : FramebufferAttachment()
{
    *this = std::move(other);
}

FramebufferAttachment &FramebufferAttachment::operator=(FramebufferAttachment &&other)
{
    std::swap(mType, other.mType);
    std::swap(mTarget, other.mTarget);
    std::swap(mResource, other.mResource);
    return *this;
}

FramebufferAttachment::~FramebufferAttachment()
{
    ASSERT(!isAttached());
}

void FramebufferAttachment::detach(const Context *context)
{
    mType = GL_NONE;
    if (mResource != nullptr)
    {
        mResource->onDetach(context);
        mResource = nullptr;
    }

    // not technically necessary, could omit for performance
    mTarget = Target();
}

void FramebufferAttachment::attach(const Context *context,
                                   GLenum type,
                                   GLenum binding,
                                   const ImageIndex &textureIndex,
                                   FramebufferAttachmentObject *resource)
{
    if (resource == nullptr)
    {
        detach(context);
        return;
    }

    mType = type;
    mTarget = Target(binding, textureIndex);
    resource->onAttach(context);

    if (mResource != nullptr)
    {
        mResource->onDetach(context);
    }

    mResource = resource;
}

GLuint FramebufferAttachment::getRedSize() const
{
    return getFormat().info->redBits;
}

GLuint FramebufferAttachment::getGreenSize() const
{
    return getFormat().info->greenBits;
}

GLuint FramebufferAttachment::getBlueSize() const
{
    return getFormat().info->blueBits;
}

GLuint FramebufferAttachment::getAlphaSize() const
{
    return getFormat().info->alphaBits;
}

GLuint FramebufferAttachment::getDepthSize() const
{
    return getFormat().info->depthBits;
}

GLuint FramebufferAttachment::getStencilSize() const
{
    return getFormat().info->stencilBits;
}

GLenum FramebufferAttachment::getComponentType() const
{
    return getFormat().info->componentType;
}

GLenum FramebufferAttachment::getColorEncoding() const
{
    return getFormat().info->colorEncoding;
}

GLuint FramebufferAttachment::id() const
{
    return mResource->getId();
}

const ImageIndex &FramebufferAttachment::getTextureImageIndex() const
{
    ASSERT(type() == GL_TEXTURE);
    return mTarget.textureIndex();
}

GLenum FramebufferAttachment::cubeMapFace() const
{
    ASSERT(mType == GL_TEXTURE);

    const auto &index = mTarget.textureIndex();
    return IsCubeMapTextureTarget(index.type) ? index.type : GL_NONE;
}

GLint FramebufferAttachment::mipLevel() const
{
    ASSERT(type() == GL_TEXTURE);
    return mTarget.textureIndex().mipIndex;
}

GLint FramebufferAttachment::layer() const
{
    ASSERT(mType == GL_TEXTURE);

    const auto &index = mTarget.textureIndex();

    if (index.type == GL_TEXTURE_2D_ARRAY || index.type == GL_TEXTURE_3D)
    {
        return index.layerIndex;
    }
    return 0;
}

Texture *FramebufferAttachment::getTexture() const
{
    return rx::GetAs<Texture>(mResource);
}

Renderbuffer *FramebufferAttachment::getRenderbuffer() const
{
    return rx::GetAs<Renderbuffer>(mResource);
}

const egl::Surface *FramebufferAttachment::getSurface() const
{
    return rx::GetAs<egl::Surface>(mResource);
}

FramebufferAttachmentObject *FramebufferAttachment::getResource() const
{
    return mResource;
}

bool FramebufferAttachment::operator==(const FramebufferAttachment &other) const
{
    if (mResource != other.mResource || mType != other.mType)
    {
        return false;
    }

    if (mType == GL_TEXTURE && getTextureImageIndex() != other.getTextureImageIndex())
    {
        return false;
    }

    return true;
}

bool FramebufferAttachment::operator!=(const FramebufferAttachment &other) const
{
    return !(*this == other);
}

Error FramebufferAttachmentObject::getAttachmentRenderTarget(
    const Context *context,
    GLenum binding,
    const ImageIndex &imageIndex,
    rx::FramebufferAttachmentRenderTarget **rtOut) const
{
    return getAttachmentImpl()->getAttachmentRenderTarget(context, binding, imageIndex, rtOut);
}

angle::BroadcastChannel<> *FramebufferAttachmentObject::getDirtyChannel()
{
    return &mDirtyChannel;
}

}  // namespace gl

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

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