kc3-lang/angle/src/libANGLE/renderer/gl/egl/ContextEGL.cpp

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• Hash : 01ee134b
  Author :
  Date : 2023-08-02T13:43:36
  

  Revert "GL: Remove EGL_EXTERNAL_CONTEXT_SAVE_STATE_ANGLE"
  
  This reverts commit 4e0250f1926d25e39023c4ad7862ed358a0ec4b6.
  
  Reason for revert: Chromium change was reverted. crbug.com/1468956
  
  Original change's description:
  > GL: Remove EGL_EXTERNAL_CONTEXT_SAVE_STATE_ANGLE
  >
  > Now that Chromium no longer uses it.
  >
  > Bug: angleproject:5509
  > Change-Id: Ibb8d9cdc4d67dad77ca50437423b18d81e838203
  > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4724768
  > Reviewed-by: Peng Huang <penghuang@chromium.org>
  > Reviewed-by: Geoff Lang <geofflang@chromium.org>
  > Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  
  Bug: angleproject:5509
  Change-Id: Id8143b1715ec8162be9351437fbd34a2aa4c2e00
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4742521
  Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• src/libANGLE/renderer/gl/egl/ContextEGL.cpp

• //
  // Copyright 2018 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.
  //
  
  #include "libANGLE/renderer/gl/egl/ContextEGL.h"
  
  #include "libANGLE/renderer/gl/FramebufferGL.h"
  #include "libANGLE/renderer/gl/StateManagerGL.h"
  
  namespace rx
  {
  
  ContextEGL::ContextEGL(const gl::State &state,
                         gl::ErrorSet *errorSet,
                         const std::shared_ptr<RendererEGL> &renderer,
                         RobustnessVideoMemoryPurgeStatus robustnessVideoMemoryPurgeStatus)
      : ContextGL(state, errorSet, renderer, robustnessVideoMemoryPurgeStatus), mRendererEGL(renderer)
  {}
  
  ContextEGL::~ContextEGL() {}
  
  angle::Result ContextEGL::onMakeCurrent(const gl::Context *context)
  {
      // If this context is wrapping an external native context, save state from
      // that external context when first making this context current.
      if (!mIsCurrent && context->isExternal())
      {
          // TODO: The following is done if saveAndRestoreState() until chrome is switched to using
          // glAcquireExternalContextANGLE and drops usage of EGL_EXTERNAL_CONTEXT_SAVE_STATE_ANGLE.
          // After that, this code can be removed.  http://anglebug.com/5509
          if (context->saveAndRestoreState())
          {
              acquireExternalContext(context);
          }
      }
      mIsCurrent = true;
      return ContextGL::onMakeCurrent(context);
  }
  
  void ContextEGL::acquireExternalContext(const gl::Context *context)
  {
      ASSERT(context->isExternal());
  
      if (!mExtState)
      {
          mExtState        = std::make_unique<ExternalContextState>();
          const auto &caps = getCaps();
          mExtState->textureBindings.resize(static_cast<size_t>(caps.maxCombinedTextureImageUnits));
      }
  
      getStateManager()->syncFromNativeContext(getNativeExtensions(), mExtState.get());
  
      // Use current FBO as the default framebuffer when the external context is current.
      // First save the current ID of the default framebuffer to restore in
      // onUnMakeCurrent().
      gl::Framebuffer *framebuffer = mState.getDefaultFramebuffer();
      auto framebufferGL           = GetImplAs<FramebufferGL>(framebuffer);
      mPrevDefaultFramebufferID    = framebufferGL->getFramebufferID();
      framebufferGL->updateDefaultFramebufferID(mExtState->framebufferBinding);
  }
  
  angle::Result ContextEGL::onUnMakeCurrent(const gl::Context *context)
  {
      mIsCurrent = false;
  
      if (context->isExternal() && context->saveAndRestoreState())
      {
          releaseExternalContext(context);
      }
  
      return ContextGL::onUnMakeCurrent(context);
  }
  
  void ContextEGL::releaseExternalContext(const gl::Context *context)
  {
      ASSERT(context->isExternal());
      ASSERT(mExtState);
  
      getStateManager()->restoreNativeContext(getNativeExtensions(), mExtState.get());
  
      // If the default framebuffer exists, update its ID (note that there can
      // be multiple consecutive onUnMakeCurrent() calls in destruction, and
      // the default FBO will have been unset by the first one).
      gl::Framebuffer *framebuffer = mState.getDefaultFramebuffer();
      if (framebuffer)
      {
          auto framebufferGL = GetImplAs<FramebufferGL>(framebuffer);
          framebufferGL->updateDefaultFramebufferID(mPrevDefaultFramebufferID);
      }
  }
  
  EGLContext ContextEGL::getContext() const
  {
      return mRendererEGL->getContext();
  }
  
  }  // namespace rx
  

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