FramebufferAttachment.cpp

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Author : Jamie Madill
Date : 2016-07-22 22:13:26
Hash : a3944d4f
Message : Add gl::Format to represent a texture/rb/surface format. This has a few advantages: it preserves all the information of the internal format, such as if it is sized or unsized. It also saves looking up the format multiple times in the table, which should improve speed in some cases. The extra sized-ness information will allow us to perform the correct validation in CopyTexSubImage calls. BUG=angleproject:1228 Change-Id: I42954771b0a9a968f5d787b8cf6e0af721791855 Reviewed-on: https://chromium-review.googlesource.com/362626 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jamie Madill <jmadill@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(GLenum type,
                                             GLenum binding,
                                             const ImageIndex &textureIndex,
                                             FramebufferAttachmentObject *resource)
    : mResource(nullptr)
{
    attach(type, binding, textureIndex, resource);
}

FramebufferAttachment::FramebufferAttachment(const FramebufferAttachment &other)
    : mResource(nullptr)
{
    attach(other.mType, other.mTarget.binding(), other.mTarget.textureIndex(), other.mResource);
}

FramebufferAttachment &FramebufferAttachment::operator=(const FramebufferAttachment &other)
{
    attach(other.mType, other.mTarget.binding(), other.mTarget.textureIndex(), other.mResource);
    return *this;
}

FramebufferAttachment::~FramebufferAttachment()
{
    detach();
}

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

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

void FramebufferAttachment::attach(GLenum type,
                                   GLenum binding,
                                   const ImageIndex &textureIndex,
                                   FramebufferAttachmentObject *resource)
{
    mType = type;
    mTarget = Target(binding, textureIndex);

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

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 FramebufferAttachment::Target &target,
    rx::FramebufferAttachmentRenderTarget **rtOut) const
{
    return getAttachmentImpl()->getAttachmentRenderTarget(target, 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