kc3-lang/angle/src/libEGL/libEGL.cpp

Branch : - branch - main - tag -

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• Author : apatrick@chromium.org
  Date : 2010-08-31 20:00:18
  Hash : 0db0d6c8
  Message : Replaces swap chain lazily when the swap interval is changed. It does not appear to be possible to pass a presentation interval to Present() or change it after creating the swap chain, short of calling Reset(). I decided to try fixing it by replacing the swap chain under the same conditions as a window resize. I tested it with a modified version of the simple vertex shader sample, passing various values to eglSwapInterval. My reading of the EGL spec might be wrong but I believe the interval state should be associated with the surface bound to the current context, rather than the display. Review URL: http://codereview.appspot.com/2036044 git-svn-id: https://angleproject.googlecode.com/svn/trunk@408 736b8ea6-26fd-11df-bfd4-992fa37f6226

• src/libEGL/libEGL.cpp

• //
  // Copyright (c) 2002-2010 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.
  //
  
  // libEGL.cpp: Implements the exported EGL functions.
  
  #include <exception>
  
  #include "common/debug.h"
  #include "libGLESv2/Context.h"
  
  #include "libEGL/main.h"
  #include "libEGL/Display.h"
  
  
  bool validate(egl::Display *display)
  {
      if (display == EGL_NO_DISPLAY)
      {
          return error(EGL_BAD_DISPLAY, false);
      }
  
      if (!display->isInitialized())
      {
          return error(EGL_NOT_INITIALIZED, false);
      }
  
      return true;
  }
  
  bool validate(egl::Display *display, EGLConfig config)
  {
      if (!validate(display))
      {
          return false;
      }
  
      if (!display->isValidConfig(config))
      {
          return error(EGL_BAD_CONFIG, false);
      }
  
      return true;
  }
  
  bool validate(egl::Display *display, gl::Context *context)
  {
      if (!validate(display))
      {
          return false;
      }
  
      if (!display->isValidContext(context))
      {
          return error(EGL_BAD_CONTEXT, false);
      }
  
      return true;
  }
  
  bool validate(egl::Display *display, egl::Surface *surface)
  {
      if (!validate(display))
      {
          return false;
      }
  
      if (!display->isValidSurface(surface))
      {
          return error(EGL_BAD_SURFACE, false);
      }
  
      return true;
  }
  
  extern "C"
  {
  EGLint __stdcall eglGetError(void)
  {
      TRACE("()");
  
      EGLint error = egl::getCurrentError();
  
      if (error != EGL_SUCCESS)
      {
          egl::setCurrentError(EGL_SUCCESS);
      }
  
      return error;
  }
  
  EGLDisplay __stdcall eglGetDisplay(EGLNativeDisplayType display_id)
  {
      TRACE("(EGLNativeDisplayType display_id = 0x%0.8p)", display_id);
  
      try
      {
          // FIXME: Return the same EGLDisplay handle when display_id already created a display
  
          if (display_id == EGL_DEFAULT_DISPLAY)
          {
              return new egl::Display((HDC)NULL);
          }
          else
          {
              // FIXME: Check if display_id is a valid display device context
  
              return new egl::Display((HDC)display_id);
          }
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_NO_DISPLAY);
      }
  
      return EGL_NO_DISPLAY;
  }
  
  EGLBoolean __stdcall eglInitialize(EGLDisplay dpy, EGLint *major, EGLint *minor)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLint *major = 0x%0.8p, EGLint *minor = 0x%0.8p)",
            dpy, major, minor);
  
      try
      {
          if (dpy == EGL_NO_DISPLAY)
          {
              return error(EGL_BAD_DISPLAY, EGL_FALSE);
          }
  
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!display->initialize())
          {
              return error(EGL_NOT_INITIALIZED, EGL_FALSE);
          }
  
          if (major) *major = 1;
          if (minor) *minor = 4;
  
          return success(EGL_TRUE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLBoolean __stdcall eglTerminate(EGLDisplay dpy)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p)", dpy);
  
      try
      {
          if (dpy == EGL_NO_DISPLAY)
          {
              return error(EGL_BAD_DISPLAY, EGL_FALSE);
          }
  
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          display->terminate();
  
          return success(EGL_TRUE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  const char *__stdcall eglQueryString(EGLDisplay dpy, EGLint name)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLint name = %d)", dpy, name);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display))
          {
              return NULL;
          }
  
          switch (name)
          {
            case EGL_CLIENT_APIS:
              return success("OpenGL_ES");
            case EGL_EXTENSIONS:
              return success("");
            case EGL_VENDOR:
              return success("TransGaming Inc.");
            case EGL_VERSION:
              return success("1.4 (git-devel "__DATE__" " __TIME__")");
          }
  
          return error(EGL_BAD_PARAMETER, (const char*)NULL);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, (const char*)NULL);
      }
  
      return NULL;
  }
  
  EGLBoolean __stdcall eglGetConfigs(EGLDisplay dpy, EGLConfig *configs, EGLint config_size, EGLint *num_config)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLConfig *configs = 0x%0.8p, "
            "EGLint config_size = %d, EGLint *num_config = 0x%0.8p)",
            dpy, configs, config_size, num_config);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display))
          {
              return EGL_FALSE;
          }
  
          if (!num_config)
          {
              return error(EGL_BAD_PARAMETER, EGL_FALSE);
          }
  
          const EGLint attribList[] =    {EGL_NONE};
  
          if (!display->getConfigs(configs, attribList, config_size, num_config))
          {
              return error(EGL_BAD_ATTRIBUTE, EGL_FALSE);
          }
  
          return success(EGL_TRUE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLBoolean __stdcall eglChooseConfig(EGLDisplay dpy, const EGLint *attrib_list, EGLConfig *configs, EGLint config_size, EGLint *num_config)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, const EGLint *attrib_list = 0x%0.8p, "
            "EGLConfig *configs = 0x%0.8p, EGLint config_size = %d, EGLint *num_config = 0x%0.8p)",
            dpy, attrib_list, configs, config_size, num_config);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display))
          {
              return EGL_FALSE;
          }
  
          if (!num_config)
          {
              return error(EGL_BAD_PARAMETER, EGL_FALSE);
          }
  
          const EGLint attribList[] =    {EGL_NONE};
  
          if (!attrib_list)
          {
              attrib_list = attribList;
          }
  
          display->getConfigs(configs, attrib_list, config_size, num_config);
  
          return success(EGL_TRUE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLBoolean __stdcall eglGetConfigAttrib(EGLDisplay dpy, EGLConfig config, EGLint attribute, EGLint *value)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLConfig config = 0x%0.8p, EGLint attribute = %d, EGLint *value = 0x%0.8p)",
            dpy, config, attribute, value);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display, config))
          {
              return EGL_FALSE;
          }
  
          if (!display->getConfigAttrib(config, attribute, value))
          {
              return error(EGL_BAD_ATTRIBUTE, EGL_FALSE);
          }
  
          return success(EGL_TRUE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLSurface __stdcall eglCreateWindowSurface(EGLDisplay dpy, EGLConfig config, EGLNativeWindowType win, const EGLint *attrib_list)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLConfig config = 0x%0.8p, EGLNativeWindowType win = 0x%0.8p, "
            "const EGLint *attrib_list = 0x%0.8p)", dpy, config, win, attrib_list);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display, config))
          {
              return EGL_NO_SURFACE;
          }
  
          HWND window = (HWND)win;
  
          if (!IsWindow(window))
          {
              return error(EGL_BAD_NATIVE_WINDOW, EGL_NO_SURFACE);
          }
  
          if (attrib_list)
          {
              while (*attrib_list != EGL_NONE)
              {
                  switch (attrib_list[0])
                  {
                    case EGL_RENDER_BUFFER:
                      switch (attrib_list[1])
                      {
                        case EGL_BACK_BUFFER:
                          break;
                        case EGL_SINGLE_BUFFER:
                          return error(EGL_BAD_MATCH, EGL_NO_SURFACE);   // Rendering directly to front buffer not supported
                        default:
                          return error(EGL_BAD_ATTRIBUTE, EGL_NO_SURFACE);
                      }
                      break;
                    case EGL_VG_COLORSPACE:
                      return error(EGL_BAD_MATCH, EGL_NO_SURFACE);
                    case EGL_VG_ALPHA_FORMAT:
                      return error(EGL_BAD_MATCH, EGL_NO_SURFACE);
                    default:
                      return error(EGL_BAD_ATTRIBUTE, EGL_NO_SURFACE);
                  }
              }
          }
  
          if (display->hasExistingWindowSurface(window))
          {
              return error(EGL_BAD_ALLOC, EGL_NO_SURFACE);
          }
  
          EGLSurface surface = (EGLSurface)display->createWindowSurface(window, config);
  
          return success(surface);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_NO_SURFACE);
      }
  
      return EGL_NO_SURFACE;
  }
  
  EGLSurface __stdcall eglCreatePbufferSurface(EGLDisplay dpy, EGLConfig config, const EGLint *attrib_list)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLConfig config = 0x%0.8p, const EGLint *attrib_list = 0x%0.8p)",
            dpy, config, attrib_list);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display, config))
          {
              return EGL_NO_SURFACE;
          }
  
          UNIMPLEMENTED();   // FIXME
  
          return success(EGL_NO_DISPLAY);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_NO_SURFACE);
      }
  
      return EGL_NO_SURFACE;
  }
  
  EGLSurface __stdcall eglCreatePixmapSurface(EGLDisplay dpy, EGLConfig config, EGLNativePixmapType pixmap, const EGLint *attrib_list)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLConfig config = 0x%0.8p, EGLNativePixmapType pixmap = 0x%0.8p, "
            "const EGLint *attrib_list = 0x%0.8p)", dpy, config, pixmap, attrib_list);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display, config))
          {
              return EGL_NO_SURFACE;
          }
  
          UNIMPLEMENTED();   // FIXME
  
          return success(EGL_NO_DISPLAY);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_NO_SURFACE);
      }
  
      return EGL_NO_SURFACE;
  }
  
  EGLBoolean __stdcall eglDestroySurface(EGLDisplay dpy, EGLSurface surface)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLSurface surface = 0x%0.8p)", dpy, surface);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display))
          {
              return EGL_FALSE;
          }
  
          if (surface == EGL_NO_SURFACE)
          {
              return error(EGL_BAD_SURFACE, EGL_FALSE);
          }
  
          display->destroySurface((egl::Surface*)surface);
  
          return success(EGL_TRUE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLBoolean __stdcall eglQuerySurface(EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint *value)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLSurface surface = 0x%0.8p, EGLint attribute = %d, EGLint *value = 0x%0.8p)",
            dpy, surface, attribute, value);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display))
          {
              return EGL_FALSE;
          }
  
          if (surface == EGL_NO_SURFACE)
          {
              return error(EGL_BAD_SURFACE, EGL_FALSE);
          }
  
          egl::Surface *eglSurface = (egl::Surface*)surface;
  
          switch (attribute)
          {
            case EGL_VG_ALPHA_FORMAT:
              UNIMPLEMENTED();   // FIXME
              break;
            case EGL_VG_COLORSPACE:
              UNIMPLEMENTED();   // FIXME
              break;
            case EGL_CONFIG_ID:
              UNIMPLEMENTED();   // FIXME
              break;
            case EGL_HEIGHT:
              *value = eglSurface->getHeight();
              break;
            case EGL_HORIZONTAL_RESOLUTION:
              UNIMPLEMENTED();   // FIXME
              break;
            case EGL_LARGEST_PBUFFER:
              UNIMPLEMENTED();   // FIXME
              break;
            case EGL_MIPMAP_TEXTURE:
              UNIMPLEMENTED();   // FIXME
              break;
            case EGL_MIPMAP_LEVEL:
              UNIMPLEMENTED();   // FIXME
              break;
            case EGL_MULTISAMPLE_RESOLVE:
              UNIMPLEMENTED();   // FIXME
              break;
            case EGL_PIXEL_ASPECT_RATIO:
              UNIMPLEMENTED();   // FIXME
              break;
            case EGL_RENDER_BUFFER:
              UNIMPLEMENTED();   // FIXME
              break;
            case EGL_SWAP_BEHAVIOR:
              UNIMPLEMENTED();   // FIXME
              break;
            case EGL_TEXTURE_FORMAT:
              UNIMPLEMENTED();   // FIXME
              break;
            case EGL_TEXTURE_TARGET:
              UNIMPLEMENTED();   // FIXME
              break;
            case EGL_VERTICAL_RESOLUTION:
              UNIMPLEMENTED();   // FIXME
              break;
            case EGL_WIDTH:
              *value = eglSurface->getWidth();
              break;
            default:
              return error(EGL_BAD_ATTRIBUTE, EGL_FALSE);
          }
  
          return success(EGL_TRUE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLBoolean __stdcall eglBindAPI(EGLenum api)
  {
      TRACE("(EGLenum api = 0x%X)", api);
  
      try
      {
          switch (api)
          {
            case EGL_OPENGL_API:
            case EGL_OPENVG_API:
              return error(EGL_BAD_PARAMETER, EGL_FALSE);   // Not supported by this implementation
            case EGL_OPENGL_ES_API:
              break;
            default:
              return error(EGL_BAD_PARAMETER, EGL_FALSE);
          }
  
          egl::setCurrentAPI(api);
  
          return success(EGL_TRUE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLenum __stdcall eglQueryAPI(void)
  {
      TRACE("()");
  
      try
      {
          EGLenum API = egl::getCurrentAPI();
  
          return success(API);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLBoolean __stdcall eglWaitClient(void)
  {
      TRACE("()");
  
      try
      {
          UNIMPLEMENTED();   // FIXME
  
          return success(0);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLBoolean __stdcall eglReleaseThread(void)
  {
      TRACE("()");
  
      try
      {
          eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_CONTEXT, EGL_NO_SURFACE, EGL_NO_SURFACE);
  
          return success(EGL_TRUE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLSurface __stdcall eglCreatePbufferFromClientBuffer(EGLDisplay dpy, EGLenum buftype, EGLClientBuffer buffer, EGLConfig config, const EGLint *attrib_list)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLenum buftype = 0x%X, EGLClientBuffer buffer = 0x%0.8p, "
            "EGLConfig config = 0x%0.8p, const EGLint *attrib_list = 0x%0.8p)",
            dpy, buftype, buffer, config, attrib_list);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display, config))
          {
              return EGL_NO_SURFACE;
          }
  
          UNIMPLEMENTED();   // FIXME
  
          return success(EGL_NO_SURFACE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_NO_SURFACE);
      }
  
      return EGL_NO_SURFACE;
  }
  
  EGLBoolean __stdcall eglSurfaceAttrib(EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint value)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLSurface surface = 0x%0.8p, EGLint attribute = %d, EGLint value = %d)",
            dpy, surface, attribute, value);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display))
          {
              return EGL_FALSE;
          }
  
          UNIMPLEMENTED();   // FIXME
  
          return success(EGL_TRUE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLBoolean __stdcall eglBindTexImage(EGLDisplay dpy, EGLSurface surface, EGLint buffer)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLSurface surface = 0x%0.8p, EGLint buffer = %d)", dpy, surface, buffer);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display))
          {
              return EGL_FALSE;
          }
  
          UNIMPLEMENTED();   // FIXME
  
          return success(EGL_TRUE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLBoolean __stdcall eglReleaseTexImage(EGLDisplay dpy, EGLSurface surface, EGLint buffer)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLSurface surface = 0x%0.8p, EGLint buffer = %d)", dpy, surface, buffer);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display))
          {
              return EGL_FALSE;
          }
  
          UNIMPLEMENTED();   // FIXME
  
          return success(EGL_TRUE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLBoolean __stdcall eglSwapInterval(EGLDisplay dpy, EGLint interval)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLint interval = %d)", dpy, interval);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display))
          {
              return EGL_FALSE;
          }
  
          egl::Surface *draw_surface = static_cast<egl::Surface*>(egl::getCurrentDrawSurface());
  
          if (draw_surface == NULL)
          {
              return error(EGL_BAD_SURFACE, EGL_FALSE);
          }
          
          draw_surface->setSwapInterval(interval);
  
          return success(EGL_TRUE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLContext __stdcall eglCreateContext(EGLDisplay dpy, EGLConfig config, EGLContext share_context, const EGLint *attrib_list)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLConfig config = 0x%0.8p, EGLContext share_context = 0x%0.8p, "
            "const EGLint *attrib_list = 0x%0.8p)", dpy, config, share_context, attrib_list);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display, config))
          {
              return EGL_NO_CONTEXT;
          }
  
          EGLContext context = display->createContext(config, static_cast<gl::Context*>(share_context));
  
          return success(context);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_NO_CONTEXT);
      }
  
      return EGL_NO_CONTEXT;
  }
  
  EGLBoolean __stdcall eglDestroyContext(EGLDisplay dpy, EGLContext ctx)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLContext ctx = 0x%0.8p)", dpy, ctx);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display))
          {
              return EGL_FALSE;
          }
  
          if (ctx == EGL_NO_CONTEXT)
          {
              return error(EGL_BAD_CONTEXT, EGL_FALSE);
          }
  
          display->destroyContext((gl::Context*)ctx);
  
          return success(EGL_TRUE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLBoolean __stdcall eglMakeCurrent(EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext ctx)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLSurface draw = 0x%0.8p, EGLSurface read = 0x%0.8p, EGLContext ctx = 0x%0.8p)",
            dpy, draw, read, ctx);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
          gl::Context *context = static_cast<gl::Context*>(ctx);
          IDirect3DDevice9 *device = display->getDevice();
  
          if (!device || FAILED(device->TestCooperativeLevel()))
          {
              return error(EGL_CONTEXT_LOST, EGL_FALSE);
          }
  
          if (ctx != EGL_NO_CONTEXT && !validate(display, context))
          {
              return EGL_FALSE;
          }
  
          if ((draw != EGL_NO_SURFACE && !validate(display, static_cast<egl::Surface*>(draw))) ||
              (read != EGL_NO_SURFACE && !validate(display, static_cast<egl::Surface*>(read))))
          {
              return EGL_FALSE;
          }
  
          if (draw != read)
          {
              UNIMPLEMENTED();   // FIXME
          }
  
          egl::setCurrentDisplay(dpy);
          egl::setCurrentDrawSurface(draw);
          egl::setCurrentReadSurface(read);
  
          glMakeCurrent(context, display, static_cast<egl::Surface*>(draw));
  
          return success(EGL_TRUE);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLContext __stdcall eglGetCurrentContext(void)
  {
      TRACE("()");
  
      try
      {
          EGLContext context = glGetCurrentContext();
  
          return success(context);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_NO_CONTEXT);
      }
  
      return EGL_NO_CONTEXT;
  }
  
  EGLSurface __stdcall eglGetCurrentSurface(EGLint readdraw)
  {
      TRACE("(EGLint readdraw = %d)", readdraw);
  
      try
      {
          if (readdraw == EGL_READ)
          {
              EGLSurface read = egl::getCurrentReadSurface();
              return success(read);
          }
          else if (readdraw == EGL_DRAW)
          {
              EGLSurface draw = egl::getCurrentDrawSurface();
              return success(draw);
          }
          else
          {
              return error(EGL_BAD_PARAMETER, EGL_NO_SURFACE);
          }
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_NO_SURFACE);
      }
  
      return EGL_NO_SURFACE;
  }
  
  EGLDisplay __stdcall eglGetCurrentDisplay(void)
  {
      TRACE("()");
  
      try
      {
          EGLDisplay dpy = egl::getCurrentDisplay();
  
          return success(dpy);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_NO_DISPLAY);
      }
  
      return EGL_NO_DISPLAY;
  }
  
  EGLBoolean __stdcall eglQueryContext(EGLDisplay dpy, EGLContext ctx, EGLint attribute, EGLint *value)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLContext ctx = 0x%0.8p, EGLint attribute = %d, EGLint *value = 0x%0.8p)",
            dpy, ctx, attribute, value);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display))
          {
              return EGL_FALSE;
          }
  
          UNIMPLEMENTED();   // FIXME
  
          return success(0);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLBoolean __stdcall eglWaitGL(void)
  {
      TRACE("()");
  
      try
      {
          UNIMPLEMENTED();   // FIXME
  
          return success(0);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLBoolean __stdcall eglWaitNative(EGLint engine)
  {
      TRACE("(EGLint engine = %d)", engine);
  
      try
      {
          UNIMPLEMENTED();   // FIXME
  
          return success(0);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLBoolean __stdcall eglSwapBuffers(EGLDisplay dpy, EGLSurface surface)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLSurface surface = 0x%0.8p)", dpy, surface);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display))
          {
              return EGL_FALSE;
          }
  
          if (surface == EGL_NO_SURFACE)
          {
              return error(EGL_BAD_SURFACE, EGL_FALSE);
          }
  
          egl::Surface *eglSurface = (egl::Surface*)surface;
  
          if (eglSurface->swap())
          {
              return success(EGL_TRUE);
          }
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  EGLBoolean __stdcall eglCopyBuffers(EGLDisplay dpy, EGLSurface surface, EGLNativePixmapType target)
  {
      TRACE("(EGLDisplay dpy = 0x%0.8p, EGLSurface surface = 0x%0.8p, EGLNativePixmapType target = 0x%0.8p)", dpy, surface, target);
  
      try
      {
          egl::Display *display = static_cast<egl::Display*>(dpy);
  
          if (!validate(display))
          {
              return EGL_FALSE;
          }
  
          UNIMPLEMENTED();   // FIXME
  
          return success(0);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, EGL_FALSE);
      }
  
      return EGL_FALSE;
  }
  
  __eglMustCastToProperFunctionPointerType __stdcall eglGetProcAddress(const char *procname)
  {
      TRACE("(const char *procname = \"%s\")", procname);
  
      try
      {
          struct Extension
          {
              const char *name;
              __eglMustCastToProperFunctionPointerType address;
          };
  
          static const Extension eglExtensions[] =
          {
              {"", NULL},
          };
  
          for (int ext = 0; ext < sizeof(eglExtensions) / sizeof(Extension); ext++)
          {
              if (strcmp(procname, eglExtensions[ext].name) == 0)
              {
                  return (__eglMustCastToProperFunctionPointerType)eglExtensions[ext].address;
              }
          }
  
          return glGetProcAddress(procname);
      }
      catch(std::bad_alloc&)
      {
          return error(EGL_BAD_ALLOC, (__eglMustCastToProperFunctionPointerType)NULL);
      }
  
      return NULL;
  }
  }