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

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• Hash : 29bb612e
  Author :
  Date : 2020-05-28T10:32:26
  

  Add egl::ShareGroup class to abstract the share context group
  
  Vulkan backend has a barrier tracker that tracks memory barrier needs of
  all shared resources. Because the buffer/texture objects are shared
  resources within a shared group, the tracker can not live in a context.
  Putting it in a device/renderer requires locks. It fits perfectly in a
  shareGroup object. The work is already done at API level to handle the
  mutex lock for shared context access so that no extra lock needs to be
  taken in the backend. This CL adds egl::ShareGroup class that represents
  the object that are shared among all share context group. At the front
  end this usually will include all the shared resource managers (not done
  in this CL). The ShareGroup object is accessible from gl::State object.
  This CL also adds ability for backend driver to allocate implementation
  specific ShareGroupImpl object. Vulkan backend will then use it to keeps
  the barrier tracker and other things that naturally fits the share group
  concept.
  
  Bug: angleproject:4664
  Change-Id: Ifcd975cbdf5130022e21c41397894afc28f572e7
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2217252
  Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Charlie Lao <cclao@google.com>
  

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• src/libANGLE/renderer/gl/DisplayGL.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.
  //
  
  // DisplayGL.h: GL implementation of egl::Display
  
  #include "libANGLE/renderer/gl/DisplayGL.h"
  
  #include "libANGLE/AttributeMap.h"
  #include "libANGLE/Context.h"
  #include "libANGLE/Display.h"
  #include "libANGLE/Surface.h"
  #include "libANGLE/renderer/gl/ContextGL.h"
  #include "libANGLE/renderer/gl/RendererGL.h"
  #include "libANGLE/renderer/gl/StateManagerGL.h"
  #include "libANGLE/renderer/gl/SurfaceGL.h"
  
  #include <EGL/eglext.h>
  
  namespace rx
  {
  
  DisplayGL::DisplayGL(const egl::DisplayState &state) : DisplayImpl(state) {}
  
  DisplayGL::~DisplayGL() {}
  
  egl::Error DisplayGL::initialize(egl::Display *display)
  {
      return egl::NoError();
  }
  
  void DisplayGL::terminate() {}
  
  ImageImpl *DisplayGL::createImage(const egl::ImageState &state,
                                    const gl::Context *context,
                                    EGLenum target,
                                    const egl::AttributeMap &attribs)
  {
      UNIMPLEMENTED();
      return nullptr;
  }
  
  StreamProducerImpl *DisplayGL::createStreamProducerD3DTexture(
      egl::Stream::ConsumerType consumerType,
      const egl::AttributeMap &attribs)
  {
      UNIMPLEMENTED();
      return nullptr;
  }
  
  ShareGroupImpl *DisplayGL::createShareGroup()
  {
      return new ShareGroupGL();
  }
  
  egl::Error DisplayGL::makeCurrent(egl::Surface *drawSurface,
                                    egl::Surface *readSurface,
                                    gl::Context *context)
  {
      if (!context)
      {
          return egl::NoError();
      }
  
      // Pause transform feedback before making a new surface current, to workaround anglebug.com/1426
      ContextGL *glContext = GetImplAs<ContextGL>(context);
      glContext->getStateManager()->pauseTransformFeedback();
  
      if (drawSurface == nullptr)
      {
          ANGLE_TRY(makeCurrentSurfaceless(context));
      }
  
      return egl::NoError();
  }
  
  gl::Version DisplayGL::getMaxConformantESVersion() const
  {
      // 3.1 support is in progress.
      return std::min(getMaxSupportedESVersion(), gl::Version(3, 0));
  }
  
  void DisplayGL::generateExtensions(egl::DisplayExtensions *outExtensions) const
  {
      // Advertise robust resource initialization on all OpenGL backends for testing even though it is
      // not fully implemented.
      outExtensions->robustResourceInitialization = true;
  }
  
  egl::Error DisplayGL::makeCurrentSurfaceless(gl::Context *context)
  {
      UNIMPLEMENTED();
      return egl::NoError();
  }
  }  // namespace rx
  

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