kc3-lang/angle/src/libANGLE/renderer/FramebufferAttachmentObjectImpl.h

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• Hash : 05b35b21
  Author :
  Date : 2017-10-03T09:01:44
  

  D3D11: Lazy robust resource init.
  
  This patch moves the robust resource init logic to the GL front-end.
  Instead of initializing texture resources immediately on creation in
  D3D11, it defers the clear until before a draw call in some cases, or
  skips the update if we can determine if a texture (or other resource)
  has been fully initialized.
  
  Currently lazy init is only implemented for Textures, Renderbuffers,
  and Surfaces.
  
  Various places where lazy resource init is triggered:
  * Framebuffer operations (Draw, Blit, CopyTexImage, Clear, ReadPixels)
  * Texture operations (SubImage, GenerateMipmap, CopyTexImage)
  
  Some efficiency gains remain to be implemented, such as when a
  SubImage call fills the entire object. Similarly for Blit, and a few
  other operations. In these cases we can skip lazy init as an
  optimization. Edge cases with EGLImage are mostly untested.
  
  BUG=angleproject:2107
  
  Change-Id: I2bf3a69b1eae0d4feeb5b17daca23451f1037be8
  Reviewed-on: https://chromium-review.googlesource.com/576058
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  

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• src/libANGLE/renderer/FramebufferAttachmentObjectImpl.h

• //
  // Copyright 2016 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.
  //
  // FramebufferAttachmentObjectImpl.h:
  //   Common ancenstor for all implementations of FBO attachable-objects.
  //   This means Surfaces, Textures and Renderbuffers.
  //
  
  #ifndef LIBANGLE_RENDERER_FRAMEBUFFER_ATTACHMENT_OBJECT_IMPL_H_
  #define LIBANGLE_RENDERER_FRAMEBUFFER_ATTACHMENT_OBJECT_IMPL_H_
  
  #include "libANGLE/FramebufferAttachment.h"
  
  namespace rx
  {
  
  class FramebufferAttachmentObjectImpl : angle::NonCopyable
  {
    public:
      FramebufferAttachmentObjectImpl() {}
      virtual ~FramebufferAttachmentObjectImpl() {}
  
      virtual gl::Error getAttachmentRenderTarget(const gl::Context *context,
                                                  GLenum binding,
                                                  const gl::ImageIndex &imageIndex,
                                                  FramebufferAttachmentRenderTarget **rtOut)
      {
          UNIMPLEMENTED();
          return gl::OutOfMemory() << "getAttachmentRenderTarget not supported.";
      }
  
      virtual gl::Error initializeContents(const gl::Context *context,
                                           const gl::ImageIndex &imageIndex)
      {
          UNIMPLEMENTED();
          return gl::OutOfMemory() << "initialize not supported.";
      }
  };
  
  }  // namespace rx
  
  #endif  // LIBANGLE_RENDERER_FRAMEBUFFER_ATTACHMENT_OBJECT_IMPL_H_
  

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