kc3-lang/angle/src/libANGLE/renderer/gl/cgl/ContextCGL.cpp

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• Hash : 51386f4a
  Author :
  Date : 2019-04-11T21:55:20
  

  Reland "Define and expose EGL_ANGLE_power_preference extension."
  
  This is a reland of ac58e63295f093b7518535bdd060ff832025b0c5
  
  The original CL was reverted in a rush because I thought there was an
  uninitialized variable bug, but upon later re-review this turned out to
  not be the case.
  
  Original change's description:
  > Define and expose EGL_ANGLE_power_preference extension.
  >
  > Allows application to select the integrated or discrete GPU on
  > dual-GPU macOS systems.
  >
  > Tested by modifying the example program at:
  > https://github.com/grorg/ANGLEIOSurfaceTest
  >
  > and verifying that both integrated and discrete GPUs can be selected.
  > (The changes to that program will be upstreamed once some build issues
  > are resolved.)
  >
  > Bug: 2813
  > Change-Id: Ibeb17778512896456d220e9bc4cf8f222aa57057
  > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1570081
  > Commit-Queue: Kenneth Russell <kbr@chromium.org>
  > Reviewed-by: Geoff Lang <geofflang@chromium.org>
  
  Bug: 2813
  Tbr: geofflang@chromium.org
  Tbr: cwallez@chromium.org
  Change-Id: Iea000dd718f4f4b4f57237adb1dc44381b10106b
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1575419
  Reviewed-by: Kenneth Russell <kbr@chromium.org>
  Commit-Queue: Kenneth Russell <kbr@chromium.org>
  

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• src/libANGLE/renderer/gl/cgl/ContextCGL.cpp

• //
  // Copyright 2019 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.
  //
  // ContextCGL:
  //   Mac-specific subclass of ContextGL.
  //
  
  #include "libANGLE/renderer/gl/cgl/ContextCGL.h"
  
  #include "libANGLE/Context.h"
  #include "libANGLE/Display.h"
  #include "libANGLE/renderer/gl/cgl/DisplayCGL.h"
  
  namespace rx
  {
  
  ContextCGL::ContextCGL(const gl::State &state,
                         gl::ErrorSet *errorSet,
                         const std::shared_ptr<RendererGL> &renderer,
                         bool usesDiscreteGPU)
      : ContextGL(state, errorSet, renderer), mUsesDiscreteGpu(usesDiscreteGPU)
  {}
  
  void ContextCGL::onDestroy(const gl::Context *context)
  {
      if (mUsesDiscreteGpu)
      {
          egl::Display *display = context->getDisplay();
          // TODO(kbr): if the context is created and destroyed without ever
          // making it current, it is possible to leak retentions of the
          // discrete GPU.
          if (display)
          {
              GetImplAs<DisplayCGL>(display)->unreferenceDiscreteGPU();
          }
      }
  }
  
  }  // namespace rx
  

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