kc3-lang/angle/src/libANGLE/renderer/gl/egl/FunctionsEGLDL.cpp

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• Hash : e7419b9f
  Author :
  Date : 2016-04-13T23:29:27
  

  Add FunctionsEGL, FunctionsEGLDL - EGL wrappers.
  
  FunctionsEGL is an abstract class.
  FunctionsEGLDL is an libdl-based implementation.
  
  BUG=angleproject:1297
  
  Change-Id: I0fe5a337e34518cc6248494dbc4ee5c2938d4b77
  Reviewed-on: https://chromium-review.googlesource.com/338884
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
  Commit-Queue: Frank Henigman <fjhenigman@chromium.org>
  

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• src/libANGLE/renderer/gl/egl/FunctionsEGLDL.cpp

• //
  // Copyright (c) 2016 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.
  //
  
  // FunctionsEGLDL.cpp: Implements the FunctionsEGLDL class.
  
  #include "libANGLE/renderer/gl/egl/FunctionsEGLDL.h"
  
  #include <dlfcn.h>
  
  namespace rx
  {
  
  DynamicLib::DynamicLib() : handle(nullptr)
  {
  }
  
  DynamicLib::~DynamicLib()
  {
      if (handle)
      {
          dlclose(handle);
          handle = nullptr;
      }
  }
  
  // Due to a bug in Mesa (or maybe libdl) it's not possible to close and re-open libEGL.so
  // an arbitrary number of times.  End2end tests would die after a couple hundred tests.
  // So we use a static object with a destructor to close the library when the program exits.
  // TODO(fjhenigman) File a bug and put a link here.
  DynamicLib FunctionsEGLDL::sNativeLib;
  
  FunctionsEGLDL::FunctionsEGLDL()
  {
  }
  
  FunctionsEGLDL::~FunctionsEGLDL()
  {
  }
  
  egl::Error FunctionsEGLDL::initialize(EGLNativeDisplayType nativeDisplay, const char *libName)
  {
      if (!sNativeLib.handle)
      {
          sNativeLib.handle = dlopen(libName, RTLD_NOW);
          if (!sNativeLib.handle)
          {
              return egl::Error(EGL_NOT_INITIALIZED, "Could not dlopen native EGL: %s", dlerror());
          }
      }
  
      mGetProcAddressPtr =
          reinterpret_cast<PFNEGLGETPROCADDRESSPROC>(dlsym(sNativeLib.handle, "eglGetProcAddress"));
      if (!mGetProcAddressPtr)
      {
          return egl::Error(EGL_NOT_INITIALIZED, "Could not find eglGetProcAddress");
      }
  
      return FunctionsEGL::initialize(nativeDisplay);
  }
  
  void *FunctionsEGLDL::getProcAddress(const char *name) const
  {
      void *f = reinterpret_cast<void *>(mGetProcAddressPtr(name));
      if (f)
      {
          return f;
      }
      return dlsym(sNativeLib.handle, name);
  }
  
  }  // namespace rx
  

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