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

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• Author : Corentin Wallez
  Date : 2015-08-07 14:39:22
  Hash : 51706eae
  Message : Make FramebufferAttachmentObject not refcountable Re-land with a fix for an unitialized variable Instead the refcount is done via callbacks. This allows Surface to ignore this refcounting which will be useful in a follow-up CL. BUG=angleproject:891 Change-Id: I1925ccaa4ce7b502b33088660d31c404b8313cb5 Reviewed-on: https://chromium-review.googlesource.com/293712 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Corentin Wallez <cwallez@chromium.org>

• src/libANGLE/Image.cpp

• //
  // Copyright (c) 2015 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.
  //
  
  // Image.cpp: Implements the egl::Image class representing the EGLimage object.
  
  #include "libANGLE/Image.h"
  
  #include "common/debug.h"
  #include "common/utilities.h"
  #include "libANGLE/angletypes.h"
  #include "libANGLE/Texture.h"
  #include "libANGLE/Renderbuffer.h"
  #include "libANGLE/renderer/ImageImpl.h"
  
  namespace egl
  {
  ImageSibling::ImageSibling(GLuint id) : RefCountObject(id), mSourcesOf(), mTargetOf()
  {
  }
  
  ImageSibling::~ImageSibling()
  {
      // EGL images should hold a ref to their targets and siblings, a Texture should not be deletable
      // while it is attached to an EGL image.
      ASSERT(mSourcesOf.empty());
      orphanImages();
  }
  
  void ImageSibling::setTargetImage(egl::Image *imageTarget)
  {
      ASSERT(imageTarget != nullptr);
      mTargetOf.set(imageTarget);
      imageTarget->addTargetSibling(this);
  }
  
  gl::Error ImageSibling::orphanImages()
  {
      if (mTargetOf.get() != nullptr)
      {
          // Can't be a target and have sources.
          ASSERT(mSourcesOf.empty());
  
          gl::Error error = mTargetOf->orphanSibling(this);
          if (error.isError())
          {
              return error;
          }
  
          mTargetOf.set(nullptr);
      }
      else
      {
          for (auto &sourceImage : mSourcesOf)
          {
              gl::Error error = sourceImage->orphanSibling(this);
              if (error.isError())
              {
                  return error;
              }
          }
          mSourcesOf.clear();
      }
  
      return gl::Error(GL_NO_ERROR);
  }
  
  void ImageSibling::addImageSource(egl::Image *imageSource)
  {
      ASSERT(imageSource != nullptr);
      mSourcesOf.insert(imageSource);
  }
  
  void ImageSibling::removeImageSource(egl::Image *imageSource)
  {
      ASSERT(mSourcesOf.find(imageSource) != mSourcesOf.end());
      mSourcesOf.erase(imageSource);
  }
  
  Image::Image(rx::ImageImpl *impl, EGLenum target, ImageSibling *buffer, const AttributeMap &attribs)
      : RefCountObject(0),
        mImplementation(impl),
        mInternalFormat(GL_NONE),
        mWidth(0),
        mHeight(0),
        mSamples(0),
        mSource(),
        mTargets()
  {
      ASSERT(mImplementation != nullptr);
      ASSERT(buffer != nullptr);
  
      mSource.set(buffer);
      mSource->addImageSource(this);
  
      if (IsTextureTarget(target))
      {
          gl::Texture *texture = rx::GetAs<gl::Texture>(mSource.get());
          GLenum textureTarget = egl_gl::EGLImageTargetToGLTextureTarget(target);
          size_t level         = attribs.get(EGL_GL_TEXTURE_LEVEL_KHR, 0);
          mInternalFormat      = texture->getInternalFormat(textureTarget, level);
          mWidth               = texture->getWidth(textureTarget, level);
          mHeight              = texture->getHeight(textureTarget, level);
          mSamples             = 0;
      }
      else if (IsRenderbufferTarget(target))
      {
          gl::Renderbuffer *renderbuffer = rx::GetAs<gl::Renderbuffer>(mSource.get());
          mInternalFormat                = renderbuffer->getInternalFormat();
          mWidth                         = renderbuffer->getWidth();
          mHeight                        = renderbuffer->getHeight();
          mSamples                       = renderbuffer->getSamples();
      }
      else
      {
          UNREACHABLE();
      }
  }
  
  Image::~Image()
  {
      SafeDelete(mImplementation);
  
      // All targets should hold a ref to the egl image and it should not be deleted until there are
      // no siblings left.
      ASSERT(mTargets.empty());
  
      // Tell the source that it is no longer used by this image
      if (mSource.get() != nullptr)
      {
          mSource->removeImageSource(this);
          mSource.set(nullptr);
      }
  }
  
  void Image::addTargetSibling(ImageSibling *sibling)
  {
      mTargets.insert(sibling);
  }
  
  gl::Error Image::orphanSibling(ImageSibling *sibling)
  {
      // notify impl
      gl::Error error = mImplementation->orphan(sibling);
  
      if (mSource.get() == sibling)
      {
          // If the sibling is the source, it cannot be a target.
          ASSERT(mTargets.find(sibling) == mTargets.end());
  
          mSource.set(nullptr);
      }
      else
      {
          mTargets.erase(sibling);
      }
  
      return error;
  }
  
  GLenum Image::getInternalFormat() const
  {
      return mInternalFormat;
  }
  
  size_t Image::getWidth() const
  {
      return mWidth;
  }
  
  size_t Image::getHeight() const
  {
      return mHeight;
  }
  
  size_t Image::getSamples() const
  {
      return mSamples;
  }
  
  rx::ImageImpl *Image::getImplementation()
  {
      return mImplementation;
  }
  
  const rx::ImageImpl *Image::getImplementation() const
  {
      return mImplementation;
  }
  }