kc3-lang/angle/src/libANGLE/renderer/d3d/RenderbufferD3D.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/d3d/RenderbufferD3D.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.
  //
  
  // RenderbufferD3d.cpp: Implements the RenderbufferD3D class, a specialization of RenderbufferImpl
  
  
  #include "libANGLE/renderer/d3d/RenderbufferD3D.h"
  
  #include "libANGLE/Image.h"
  #include "libANGLE/renderer/d3d/EGLImageD3D.h"
  #include "libANGLE/renderer/d3d/RendererD3D.h"
  #include "libANGLE/renderer/d3d/RenderTargetD3D.h"
  
  namespace rx
  {
  RenderbufferD3D::RenderbufferD3D(RendererD3D *renderer)
      : mRenderer(renderer), mRenderTarget(nullptr), mImage(nullptr)
  {
  }
  
  RenderbufferD3D::~RenderbufferD3D()
  {
      SafeDelete(mRenderTarget);
      mImage = nullptr;
  }
  
  gl::Error RenderbufferD3D::onDestroy(const gl::Context *context)
  {
      deleteRenderTarget(context);
      return gl::NoError();
  }
  
  gl::Error RenderbufferD3D::setStorage(const gl::Context *context,
                                        GLenum internalformat,
                                        size_t width,
                                        size_t height)
  {
      return setStorageMultisample(context, 0, internalformat, width, height);
  }
  
  gl::Error RenderbufferD3D::setStorageMultisample(const gl::Context *context,
                                                   size_t samples,
                                                   GLenum internalformat,
                                                   size_t width,
                                                   size_t height)
  {
      // If the renderbuffer parameters are queried, the calling function
      // will expect one of the valid renderbuffer formats for use in
      // glRenderbufferStorage, but we should create depth and stencil buffers
      // as DEPTH24_STENCIL8
      GLenum creationFormat = internalformat;
      if (internalformat == GL_DEPTH_COMPONENT16 || internalformat == GL_STENCIL_INDEX8)
      {
          creationFormat = GL_DEPTH24_STENCIL8_OES;
      }
  
      // ANGLE_framebuffer_multisample states GL_OUT_OF_MEMORY is generated on a failure to create
      // the specified storage.
      // Because ES 3.0 already knows the exact number of supported samples, it would already have been
      // validated and generated GL_INVALID_VALUE.
      const gl::TextureCaps &formatCaps = mRenderer->getNativeTextureCaps().get(creationFormat);
      if (samples > formatCaps.getMaxSamples())
      {
          return gl::OutOfMemory() << "Renderbuffer format does not support " << samples
                                   << " samples, " << formatCaps.getMaxSamples()
                                   << " is the maximum.";
      }
  
      RenderTargetD3D *newRT = nullptr;
      ANGLE_TRY(mRenderer->createRenderTarget(static_cast<int>(width), static_cast<int>(height),
                                              creationFormat, static_cast<GLsizei>(samples), &newRT));
  
      deleteRenderTarget(context);
      mImage        = nullptr;
      mRenderTarget = newRT;
  
      return gl::NoError();
  }
  
  gl::Error RenderbufferD3D::setStorageEGLImageTarget(const gl::Context *context, egl::Image *image)
  {
      mImage = GetImplAs<EGLImageD3D>(image);
      deleteRenderTarget(context);
  
      return gl::NoError();
  }
  
  gl::Error RenderbufferD3D::getRenderTarget(const gl::Context *context,
                                             RenderTargetD3D **outRenderTarget)
  {
      if (mImage)
      {
          return mImage->getRenderTarget(context, outRenderTarget);
      }
      else
      {
          *outRenderTarget = mRenderTarget;
          return gl::NoError();
      }
  }
  
  gl::Error RenderbufferD3D::getAttachmentRenderTarget(const gl::Context *context,
                                                       GLenum /*binding*/,
                                                       const gl::ImageIndex & /*imageIndex*/,
                                                       FramebufferAttachmentRenderTarget **rtOut)
  {
      return getRenderTarget(context, reinterpret_cast<RenderTargetD3D **>(rtOut));
  }
  
  void RenderbufferD3D::deleteRenderTarget(const gl::Context *context)
  {
      if (mRenderTarget)
      {
          mRenderTarget->signalDirty(context);
          SafeDelete(mRenderTarget);
      }
  }
  
  gl::Error RenderbufferD3D::initializeContents(const gl::Context *context,
                                                const gl::ImageIndex &imageIndex)
  {
      RenderTargetD3D *renderTarget = nullptr;
      ANGLE_TRY(getRenderTarget(context, &renderTarget));
      return mRenderer->initRenderTarget(renderTarget);
  }
  
  }  // namespace rx
  

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