kc3-lang/angle/src/libANGLE/renderer/gl/RenderbufferGL.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/gl/RenderbufferGL.cpp

• //
  // Copyright 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.
  //
  
  // RenderbufferGL.cpp: Implements the class methods for RenderbufferGL.
  
  #include "libANGLE/renderer/gl/RenderbufferGL.h"
  
  #include "common/debug.h"
  #include "libANGLE/Caps.h"
  #include "libANGLE/angletypes.h"
  #include "libANGLE/renderer/gl/FunctionsGL.h"
  #include "libANGLE/renderer/gl/StateManagerGL.h"
  #include "libANGLE/renderer/gl/formatutilsgl.h"
  #include "libANGLE/renderer/gl/renderergl_utils.h"
  
  namespace rx
  {
  RenderbufferGL::RenderbufferGL(const FunctionsGL *functions,
                                 const WorkaroundsGL &workarounds,
                                 StateManagerGL *stateManager,
                                 const gl::TextureCapsMap &textureCaps)
      : RenderbufferImpl(),
        mFunctions(functions),
        mWorkarounds(workarounds),
        mStateManager(stateManager),
        mTextureCaps(textureCaps),
        mRenderbufferID(0)
  {
      mFunctions->genRenderbuffers(1, &mRenderbufferID);
      mStateManager->bindRenderbuffer(GL_RENDERBUFFER, mRenderbufferID);
  }
  
  RenderbufferGL::~RenderbufferGL()
  {
      mStateManager->deleteRenderbuffer(mRenderbufferID);
      mRenderbufferID = 0;
  }
  
  gl::Error RenderbufferGL::setStorage(const gl::Context *context,
                                       GLenum internalformat,
                                       size_t width,
                                       size_t height)
  {
      mStateManager->bindRenderbuffer(GL_RENDERBUFFER, mRenderbufferID);
  
      nativegl::RenderbufferFormat renderbufferFormat =
          nativegl::GetRenderbufferFormat(mFunctions, mWorkarounds, internalformat);
      mFunctions->renderbufferStorage(GL_RENDERBUFFER, renderbufferFormat.internalFormat,
                                      static_cast<GLsizei>(width), static_cast<GLsizei>(height));
  
      return gl::NoError();
  }
  
  gl::Error RenderbufferGL::setStorageMultisample(const gl::Context *context,
                                                  size_t samples,
                                                  GLenum internalformat,
                                                  size_t width,
                                                  size_t height)
  {
      mStateManager->bindRenderbuffer(GL_RENDERBUFFER, mRenderbufferID);
  
      nativegl::RenderbufferFormat renderbufferFormat =
          nativegl::GetRenderbufferFormat(mFunctions, mWorkarounds, internalformat);
      mFunctions->renderbufferStorageMultisample(
          GL_RENDERBUFFER, static_cast<GLsizei>(samples), renderbufferFormat.internalFormat,
          static_cast<GLsizei>(width), static_cast<GLsizei>(height));
  
      const gl::TextureCaps &formatCaps = mTextureCaps.get(internalformat);
      if (samples > formatCaps.getMaxSamples())
      {
          // Before version 4.2, it is unknown if the specific internal format can support the requested number
          // of samples.  It is expected that GL_OUT_OF_MEMORY is returned if the renderbuffer cannot be created.
          GLenum error = GL_NO_ERROR;
          do
          {
              error = mFunctions->getError();
              if (error == GL_OUT_OF_MEMORY)
              {
                  return gl::OutOfMemory();
              }
  
              ASSERT(error == GL_NO_ERROR);
          } while (error != GL_NO_ERROR);
      }
  
      return gl::NoError();
  }
  
  gl::Error RenderbufferGL::setStorageEGLImageTarget(const gl::Context *context, egl::Image *image)
  {
      UNIMPLEMENTED();
      return gl::InternalError();
  }
  
  GLuint RenderbufferGL::getRenderbufferID() const
  {
      return mRenderbufferID;
  }
  
  gl::Error RenderbufferGL::initializeContents(const gl::Context *context,
                                               const gl::ImageIndex &imageIndex)
  {
      // TODO(jmadill):
      return gl::NoError();
  }
  
  }  // namespace rx
  

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