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

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• Hash : 79aa846e
  Author :
  Date : 2022-08-17T13:40:33
  

  Reland "Not recreate Framebuffer for eglMakeCurrent() call"
  
  This is a reland of commit bf9c815263455403e587a9d2b0fdb9fb8e964208
  
  Original change's description:
  > Not recreate Framebuffer for eglMakeCurrent() call
  >
  > Right now, in eglMakeCurrent() call, ANGLE always release the
  > default framebuffer object associated to the current context,
  > and create a new default framebuffer object for the new current
  > context. It impacts chrome performance, since chrome call
  > eglMakeCurrent() a lot. With this CL, the default framebuffer
  > will be created with gl::Context. When the surface is changed
  > by eglMakeCurrent() call, ANGLE will detach the previous surface
  > from the associated framebuffer, and attach the new surface to
  > the next current context's default framebuffer.
  >
  > Bug: chromium:1336126
  > Change-Id: Iaa747669250ae250245db383a716b4634df59ea4
  > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3827751
  > Commit-Queue: Peng Huang <penghuang@chromium.org>
  > Reviewed-by: Jamie Madill <jmadill@chromium.org>
  > Reviewed-by: Geoff Lang <geofflang@chromium.org>
  
  Bug: chromium:1336126
  Change-Id: Iade19004a4335ac7bc6ca176a3c14d34afff8c9e
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3877405
  Auto-Submit: Peng Huang <penghuang@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/renderer/gl/SurfaceGL.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.
  //
  
  // SurfaceGL.cpp: OpenGL implementation of egl::Surface
  
  #include "libANGLE/renderer/gl/SurfaceGL.h"
  
  #include "libANGLE/Context.h"
  #include "libANGLE/Surface.h"
  #include "libANGLE/renderer/gl/BlitGL.h"
  #include "libANGLE/renderer/gl/ContextGL.h"
  #include "libANGLE/renderer/gl/FramebufferGL.h"
  #include "libANGLE/renderer/gl/RendererGL.h"
  
  namespace rx
  {
  
  SurfaceGL::SurfaceGL(const egl::SurfaceState &state) : SurfaceImpl(state) {}
  
  SurfaceGL::~SurfaceGL() {}
  
  egl::Error SurfaceGL::getSyncValues(EGLuint64KHR *ust, EGLuint64KHR *msc, EGLuint64KHR *sbc)
  {
      UNREACHABLE();
      return egl::EglBadSurface();
  }
  
  egl::Error SurfaceGL::getMscRate(EGLint *numerator, EGLint *denominator)
  {
      UNIMPLEMENTED();
      return egl::EglBadAccess();
  }
  
  angle::Result SurfaceGL::initializeContents(const gl::Context *context,
                                              GLenum binding,
                                              const gl::ImageIndex &imageIndex)
  {
      FramebufferGL *framebufferGL = GetImplAs<FramebufferGL>(context->getFramebuffer({0}));
      ASSERT(framebufferGL->isDefault());
  
      BlitGL *blitter = GetBlitGL(context);
  
      switch (binding)
      {
          case GL_BACK:
              ANGLE_TRY(blitter->clearFramebuffer(context, true, false, false, framebufferGL));
              break;
  
          case GL_DEPTH:
          case GL_STENCIL:
              ANGLE_TRY(blitter->clearFramebuffer(context, false, true, true, framebufferGL));
              break;
  
          default:
              UNREACHABLE();
              break;
      }
  
      return angle::Result::Continue;
  }
  
  bool SurfaceGL::hasEmulatedAlphaChannel() const
  {
      return false;
  }
  
  egl::Error SurfaceGL::attachToFramebuffer(const gl::Context *context, gl::Framebuffer *framebuffer)
  {
      return egl::NoError();
  }
  
  egl::Error SurfaceGL::detachFromFramebuffer(const gl::Context *context,
                                              gl::Framebuffer *framebuffer)
  {
      return egl::NoError();
  }
  
  }  // namespace rx
  

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