kc3-lang/angle/src/libANGLE/renderer/gl/glx/PbufferSurfaceGLX.cpp

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• Hash : 8c12874c
  Author :
  Date : 2024-09-12T11:26:29
  

  vulkan: add double buffer swapchain for fifo mode.
  
  Double buffer swapchain usually drop the performance.
  But at B* the default fps cap for silver device still at 30fps.
  This change is for reduce latency.
  
  Bug: b/311022968
  Change-Id: Ida4044f439bbe3f235d53f5d1d2f945533cbb094
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5858255
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• src/libANGLE/renderer/gl/glx/PbufferSurfaceGLX.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.
  //
  
  // PbufferSurfaceGLX.cpp: GLX implementation of egl::Surface for PBuffers
  
  #include "common/debug.h"
  #include "libANGLE/renderer/gl/glx/DisplayGLX.h"
  
  #include "libANGLE/renderer/gl/glx/FunctionsGLX.h"
  #include "libANGLE/renderer/gl/glx/PbufferSurfaceGLX.h"
  
  namespace rx
  {
  
  PbufferSurfaceGLX::PbufferSurfaceGLX(const egl::SurfaceState &state,
                                       EGLint width,
                                       EGLint height,
                                       bool largest,
                                       const FunctionsGLX &glx,
                                       glx::FBConfig fbConfig)
      : SurfaceGLX(state),
        mWidth(width),
        mHeight(height),
        mLargest(largest),
        mGLX(glx),
        mFBConfig(fbConfig),
        mPbuffer(0)
  {}
  
  PbufferSurfaceGLX::~PbufferSurfaceGLX()
  {
      if (mPbuffer)
      {
          mGLX.destroyPbuffer(mPbuffer);
      }
  }
  
  egl::Error PbufferSurfaceGLX::initialize(const egl::Display *display)
  {
      // Avoid creating 0-sized PBuffers as it fails on the Intel Mesa driver
      // as commented on https://bugs.freedesktop.org/show_bug.cgi?id=38869 so we
      // use (w, 1) or (1, h) instead.
      int width  = std::max(1, static_cast<int>(mWidth));
      int height = std::max(1, static_cast<int>(mHeight));
  
      const int attribs[] = {
          GLX_PBUFFER_WIDTH, width, GLX_PBUFFER_HEIGHT, height, GLX_LARGEST_PBUFFER, mLargest, None};
  
      mPbuffer = mGLX.createPbuffer(mFBConfig, attribs);
      if (!mPbuffer)
      {
          return egl::EglBadAlloc() << "Failed to create a native GLX pbuffer.";
      }
  
      if (mLargest)
      {
          mGLX.queryDrawable(mPbuffer, GLX_WIDTH, &mWidth);
          mGLX.queryDrawable(mPbuffer, GLX_HEIGHT, &mHeight);
      }
  
      return egl::NoError();
  }
  
  egl::Error PbufferSurfaceGLX::makeCurrent(const gl::Context *context)
  {
      return egl::NoError();
  }
  
  egl::Error PbufferSurfaceGLX::swap(const gl::Context *context)
  {
      return egl::NoError();
  }
  
  egl::Error PbufferSurfaceGLX::postSubBuffer(const gl::Context *context,
                                              EGLint x,
                                              EGLint y,
                                              EGLint width,
                                              EGLint height)
  {
      return egl::NoError();
  }
  
  egl::Error PbufferSurfaceGLX::querySurfacePointerANGLE(EGLint attribute, void **value)
  {
      UNIMPLEMENTED();
      return egl::NoError();
  }
  
  egl::Error PbufferSurfaceGLX::bindTexImage(const gl::Context *context,
                                             gl::Texture *texture,
                                             EGLint buffer)
  {
      UNIMPLEMENTED();
      return egl::NoError();
  }
  
  egl::Error PbufferSurfaceGLX::releaseTexImage(const gl::Context *context, EGLint buffer)
  {
      UNIMPLEMENTED();
      return egl::NoError();
  }
  
  void PbufferSurfaceGLX::setSwapInterval(const egl::Display *display, EGLint interval) {}
  
  EGLint PbufferSurfaceGLX::getWidth() const
  {
      return mWidth;
  }
  
  EGLint PbufferSurfaceGLX::getHeight() const
  {
      return mHeight;
  }
  
  EGLint PbufferSurfaceGLX::isPostSubBufferSupported() const
  {
      UNIMPLEMENTED();
      return EGL_FALSE;
  }
  
  EGLint PbufferSurfaceGLX::getSwapBehavior() const
  {
      return EGL_BUFFER_PRESERVED;
  }
  
  egl::Error PbufferSurfaceGLX::checkForResize()
  {
      // The size of pbuffers never change
      return egl::NoError();
  }
  
  glx::Drawable PbufferSurfaceGLX::getDrawable() const
  {
      return mPbuffer;
  }
  
  }  // namespace rx
  

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