kc3-lang/angle/src/libANGLE/Thread.cpp

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• Hash : 61e16b44
  Author :
  Date : 2017-06-19T11:13:23
  

  Context: Bind current display/surface.
  
  Looking at the EGL spec, it says for eglGetCurrentDisplay:
  
  "The display for the current context in the calling thread, for the
  current rendering API, is returned."
  
  This implies that MakeCurrent binds a display to a Context. There's
  also pretty clear language for the read/draw Surface as well, that
  they can only be bound to one Context/thread at a time. Hence we
  don't need to duplicate this storage in the egl::Thread structure,
  merely storing a pointer to the current Context, which has access
  to the read/draw Surface and current Display.
  
  BUG=angleproject:1156
  
  Change-Id: Ia3b99d50b3591012c43e851834c1af02ff62a33f
  Reviewed-on: https://chromium-review.googlesource.com/538865
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/Thread.cpp

• //
  // Copyright(c) 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.
  //
  
  // Thread.cpp : Defines the Thread class which represents a global EGL thread.
  
  #include "libANGLE/Thread.h"
  
  #include "libANGLE/Context.h"
  #include "libANGLE/Error.h"
  
  namespace egl
  {
  Thread::Thread()
      : mError(EGL_SUCCESS),
        mAPI(EGL_OPENGL_ES_API),
        mContext(static_cast<gl::Context *>(EGL_NO_CONTEXT))
  {
  }
  
  void Thread::setError(const Error &error)
  {
      mError = error.getCode();
  }
  
  EGLint Thread::getError() const
  {
      return mError;
  }
  
  void Thread::setAPI(EGLenum api)
  {
      mAPI = api;
  }
  
  EGLenum Thread::getAPI() const
  {
      return mAPI;
  }
  
  void Thread::setCurrent(gl::Context *context)
  {
      mContext = context;
  }
  
  Surface *Thread::getCurrentDrawSurface() const
  {
      if (mContext)
      {
          return mContext->getCurrentDrawSurface();
      }
      return nullptr;
  }
  
  Surface *Thread::getCurrentReadSurface() const
  {
      if (mContext)
      {
          return mContext->getCurrentReadSurface();
      }
      return nullptr;
  }
  
  gl::Context *Thread::getContext() const
  {
      return mContext;
  }
  
  gl::Context *Thread::getValidContext() const
  {
      if (mContext && mContext->isContextLost())
      {
          mContext->handleError(gl::OutOfMemory() << "Context has been lost.");
          return nullptr;
      }
  
      return mContext;
  }
  
  Display *Thread::getCurrentDisplay() const
  {
      if (mContext)
      {
          return mContext->getCurrentDisplay();
      }
      return nullptr;
  }
  
  }  // namespace egl
  

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