kc3-lang/angle/src/libANGLE/renderer/gl/eagl/WindowSurfaceEAGL.h

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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/eagl/WindowSurfaceEAGL.h

• //
  // Copyright 2020 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.
  //
  
  // WindowSurfaceEAGL.h: EAGL implementation of egl::Surface
  
  #ifndef LIBANGLE_RENDERER_GL_EAGL_WINDOWSURFACEEAGL_H_
  #define LIBANGLE_RENDERER_GL_EAGL_WINDOWSURFACEEAGL_H_
  
  #include "libANGLE/renderer/gl/SurfaceGL.h"
  
  #ifdef __OBJC__
  @class EAGLContext;
  typedef EAGLContext *EAGLContextObj;
  #else
  typedef void *EAGLContextObj;
  #endif
  @class CALayer;
  struct __IOSurface;
  typedef __IOSurface *IOSurfaceRef;
  
  // WebKit's build process requires that every Objective-C class name has the prefix "Web" to avoid
  // clobbering user-created Objective-C classes.
  #if defined(PREFIX_OBJECTIVE_C_CLASSES_WITH_WEB_FOR_WEBKIT)
  #    define SwapLayerEAGL WebSwapLayerEAGL
  #endif
  @class SwapLayerEAGL;
  
  namespace rx
  {
  
  class DisplayEAGL;
  class FramebufferGL;
  class FunctionsGL;
  class RendererGL;
  class StateManagerGL;
  
  struct SharedSwapState
  {
      struct SwapTexture
      {
          GLuint texture;
          unsigned int width;
          unsigned int height;
          uint64_t swapId;
      };
  
      SwapTexture textures[3];
  
      // This code path is not going to be used by Chrome so we take the liberty
      // to use pthreads directly instead of using mutexes and condition variables
      // via the Platform API.
      pthread_mutex_t mutex;
      // The following members should be accessed only when holding the mutex
      // (or doing construction / destruction)
      SwapTexture *beingRendered;
      SwapTexture *lastRendered;
      SwapTexture *beingPresented;
  };
  
  class WindowSurfaceEAGL : public SurfaceGL
  {
    public:
      WindowSurfaceEAGL(const egl::SurfaceState &state,
                        RendererGL *renderer,
                        EGLNativeWindowType layer,
                        EAGLContextObj context);
      ~WindowSurfaceEAGL() override;
  
      egl::Error initialize(const egl::Display *display) override;
      egl::Error makeCurrent(const gl::Context *context) override;
  
      egl::Error swap(const gl::Context *context) override;
      egl::Error postSubBuffer(const gl::Context *context,
                               EGLint x,
                               EGLint y,
                               EGLint width,
                               EGLint height) override;
      egl::Error querySurfacePointerANGLE(EGLint attribute, void **value) override;
      egl::Error bindTexImage(const gl::Context *context,
                              gl::Texture *texture,
                              EGLint buffer) override;
      egl::Error releaseTexImage(const gl::Context *context, EGLint buffer) override;
      void setSwapInterval(EGLint interval) override;
  
      EGLint getWidth() const override;
      EGLint getHeight() const override;
  
      EGLint isPostSubBufferSupported() const override;
      EGLint getSwapBehavior() const override;
  
      egl::Error attachToFramebuffer(const gl::Context *context,
                                     gl::Framebuffer *framebuffer) override;
      egl::Error detachFromFramebuffer(const gl::Context *context,
                                       gl::Framebuffer *framebuffer) override;
  
    private:
      SwapLayerEAGL *mSwapLayer;
      SharedSwapState mSwapState;
      uint64_t mCurrentSwapId;
  
      CALayer *mLayer;
      EAGLContextObj mContext;
      const FunctionsGL *mFunctions;
      StateManagerGL *mStateManager;
  
      GLuint mDSRenderbuffer;
      GLuint mFramebufferID;
  };
  
  }  // namespace rx
  
  #endif  // LIBANGLE_RENDERER_GL_EAGL_WINDOWSURFACEEAGL_H_
  

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