kc3-lang/angle/src/libANGLE/renderer/null/SurfaceNULL.cpp

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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/null/SurfaceNULL.cpp

• //
  // 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.
  //
  // SurfaceNULL.cpp:
  //    Implements the class methods for SurfaceNULL.
  //
  
  #include "libANGLE/renderer/null/SurfaceNULL.h"
  
  #include "common/debug.h"
  
  #include "libANGLE/renderer/null/FramebufferNULL.h"
  
  namespace rx
  {
  
  SurfaceNULL::SurfaceNULL(const egl::SurfaceState &surfaceState) : SurfaceImpl(surfaceState)
  {
  }
  
  SurfaceNULL::~SurfaceNULL()
  {
  }
  
  egl::Error SurfaceNULL::initialize(const egl::Display *display)
  {
      return egl::NoError();
  }
  
  FramebufferImpl *SurfaceNULL::createDefaultFramebuffer(const gl::FramebufferState &state)
  {
      return new FramebufferNULL(state);
  }
  
  egl::Error SurfaceNULL::swap(const gl::Context *context)
  {
      return egl::NoError();
  }
  
  egl::Error SurfaceNULL::postSubBuffer(const gl::Context *context,
                                        EGLint x,
                                        EGLint y,
                                        EGLint width,
                                        EGLint height)
  {
      return egl::NoError();
  }
  
  egl::Error SurfaceNULL::querySurfacePointerANGLE(EGLint attribute, void **value)
  {
      UNREACHABLE();
      return egl::NoError();
  }
  
  egl::Error SurfaceNULL::bindTexImage(gl::Texture *texture, EGLint buffer)
  {
      return egl::NoError();
  }
  
  egl::Error SurfaceNULL::releaseTexImage(EGLint buffer)
  {
      return egl::NoError();
  }
  
  egl::Error SurfaceNULL::getSyncValues(EGLuint64KHR *ust, EGLuint64KHR *msc, EGLuint64KHR *sbc)
  {
      UNIMPLEMENTED();
      return egl::EglBadAccess();
  }
  
  void SurfaceNULL::setSwapInterval(EGLint interval)
  {
  }
  
  EGLint SurfaceNULL::getWidth() const
  {
      // TODO(geofflang): Read from an actual window?
      return 100;
  }
  
  EGLint SurfaceNULL::getHeight() const
  {
      // TODO(geofflang): Read from an actual window?
      return 100;
  }
  
  EGLint SurfaceNULL::isPostSubBufferSupported() const
  {
      return EGL_TRUE;
  }
  
  EGLint SurfaceNULL::getSwapBehavior() const
  {
      return EGL_BUFFER_PRESERVED;
  }
  
  gl::Error SurfaceNULL::initializeContents(const gl::Context *context,
                                            const gl::ImageIndex &imageIndex)
  {
      return gl::NoError();
  }
  
  }  // namespace rx
  

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