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

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• Hash : cfb430c8
  Author :
  Date : 2025-02-10T13:19:05
  

  Remove angle::ErrorStream helper
  
  Most uses of the helper either use just the code or a fixed string,
  which compiles to a few instructions. Using this helper adds 200+ bytes
  of assembly to each use, due to the unneeded instantiation of
  ostringstream which allocates a buffer etc. The combined effect of this
  CL on an Android perf build is ~12KB (0.2%) reduction in size.
  
  The cases where the message is actually formatted are converted to an
  explicit use of ostringstream. Removing the helper so that the new code
  is explicit about the intent to use ostringstream, or an alternative way
  to format the message.
  
  Discovered accidentally while looking into size reduction due to
  __builtin_unreachable()
  
  Semi-automated code change, risk of copy-paste mistakes should be
  minimal.
  
  Bug: angleproject:394129077
  Change-Id: I47c2642d750d31416b08a1cfa435d5463c294e35
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6250078
  Commit-Queue: Roman Lavrov <romanl@google.com>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Charlie Lao <cclao@google.com>
  

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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::Error(EGL_BAD_SURFACE);
  }
  
  egl::Error SurfaceGL::getMscRate(EGLint *numerator, EGLint *denominator)
  {
      UNIMPLEMENTED();
      return egl::Error(EGL_BAD_ACCESS);
  }
  
  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:
          {
              gl::DrawBufferMask colorAttachments{0};
              ANGLE_TRY(
                  blitter->clearFramebuffer(context, colorAttachments, false, false, framebufferGL));
          }
          break;
  
          case GL_DEPTH:
          case GL_STENCIL:
              ANGLE_TRY(blitter->clearFramebuffer(context, gl::DrawBufferMask(), 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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