C++ eglCreateWindowSurface函数代码示例

// ---------------------------------------------------------
// CRollerCoasterContainer::ConstructL(const TRect& aRect)
// EPOC two phased constructor
// ---------------------------------------------------------
//
void CRollerCoasterContainer::ConstructL(const TRect& /*aRect*/)
{
    iIsGenerating = ETrue;

    CreateWindowL();

    // Make the window fullscreen
    SetExtentToWholeScreen();
    ActivateL();

    EGLConfig Config;

    // Get the display for drawing graphics
    iEglDisplay = eglGetDisplay( EGL_DEFAULT_DISPLAY );
    if( iEglDisplay == NULL )
    {
        _LIT(KGetDisplayFailed, "eglGetDisplay failed");
        User::Panic( KGetDisplayFailed, 0 );
    }

    // Initialize display
    if( eglInitialize( iEglDisplay, NULL, NULL ) == EGL_FALSE )
    {
        _LIT(KInitializeFailed, "eglInitialize failed");
        User::Panic( KInitializeFailed, 0 );
    }

    EGLConfig *configList = NULL;
    EGLint numOfConfigs = 0;
    EGLint configSize = 0;

    // Get the number of possible EGLConfigs
    if( eglGetConfigs(iEglDisplay, configList, configSize, &numOfConfigs) == EGL_FALSE )
    {
        _LIT(KGetConfigsFailed, "eglGetConfigs failed");
        User::Panic( KGetConfigsFailed, 0 );
    }

    configSize = numOfConfigs;

    // Allocate memory for the configList
    configList = (EGLConfig*) User::Alloc( sizeof(EGLConfig)*configSize );
    if( configList == NULL )
    {
        _LIT(KConfigAllocFailed, "config alloc failed");
        User::Panic( KConfigAllocFailed, 0 );
    }

    /* Define properties for the wanted EGLSurface.
       To get the best possible performance, choose
       an EGLConfig with a buffersize matching
       the current window's display mode*/
    TDisplayMode DMode = Window().DisplayMode();
    TInt BufferSize = 0;

    switch( DMode )
    {
         case(EColor4K):
             BufferSize = 12;
             break;
         case(EColor64K):
             BufferSize = 16;
             break;
         case(EColor16M):
             BufferSize = 24;
             break;
         default:
             _LIT(KDModeError, "unsupported displaymode");
             User::Panic( KDModeError, 0 );
             break;
    }

    // Define properties for the wanted EGLSurface
    const EGLint attrib_list[] = {EGL_BUFFER_SIZE, BufferSize, EGL_DEPTH_SIZE, 16, EGL_NONE};

    // Choose an EGLConfig that best matches to the properties in attrib_list
    if( eglChooseConfig(iEglDisplay, attrib_list, configList, configSize, &numOfConfigs) == EGL_FALSE )
    {
        _LIT(KChooseConfigFailed, "eglChooseConfig failed");
        User::Panic( KChooseConfigFailed, 0 );
    }

    Config = configList[0];
    User::Free( configList );

    // Create a window where the graphics are blitted
    iEglSurface = eglCreateWindowSurface( iEglDisplay, Config, &Window(), NULL );
    if( iEglSurface == NULL )
    {
        _LIT(KCreateWindowSurfaceFailed, "eglCreateWindowSurface failed");
        User::Panic( KCreateWindowSurfaceFailed, 0 );
    }

    // Create a rendering context
    iEglContext = eglCreateContext( iEglDisplay, Config, NULL, NULL );
//.........这里部分代码省略.........

//.........这里部分代码省略.........
        if (!x11Display)
        {
            printf("GLES Error: Unable to open X display\n");
        }
        x11Screen = XDefaultScreen( x11Display );

        // Gets the display parameters so we can pass the same parameters to the window to be created.
        sRootWindow	= RootWindow(x11Display, x11Screen);
        i32Depth	= DefaultDepth(x11Display, x11Screen);
        px11Visual	= &x11Visual;
        XMatchVisualInfo( x11Display, x11Screen, i32Depth, TrueColor, px11Visual);
        if (!px11Visual)
        {
            printf("GLES Error: Unable to acquire visual\n");
        }
        // Colormap of the specified visual type for the display.
        x11Colormap = XCreateColormap( x11Display, sRootWindow, px11Visual->visual, AllocNone );
        sWA.colormap = x11Colormap;

        // List of events to be handled by the application. Add to these for handling other events.
        sWA.event_mask = StructureNotifyMask | ExposureMask | ButtonPressMask | ButtonReleaseMask | KeyPressMask | KeyReleaseMask;

        // Display capabilities list.
        ui32Mask = CWBackPixel | CWBorderPixel | CWEventMask | CWColormap;

        // Creates the X11 window
        x11Window = XCreateWindow( x11Display, RootWindow(x11Display, x11Screen), 0, 0, iResX, iResY,
                                   0, CopyFromParent, InputOutput, CopyFromParent, ui32Mask, &sWA);

        // Make the window viewable and flush the output buffer.
        XMapWindow(x11Display, x11Window);
        XFlush(x11Display);

        // Make the window fullscreen
        unsigned char fullScreen = 1;
        Atom wmState = XInternAtom(x11Display, "_NET_WM_STATE", False);
        Atom wmFullScreen = XInternAtom(x11Display,"_NET_WM_STATE_FULLSCREEN", False);

        XEvent xev;
        xev.xclient.type		    = ClientMessage;
        xev.xclient.serial		    = 0;
        xev.xclient.send_event      = True;
        xev.xclient.window		    = x11Window;
        xev.xclient.message_type    = wmState;
        xev.xclient.format		    = 32;
        xev.xclient.data.l[0]		= (fullScreen ? _NET_WM_STATE_ADD : _NET_WM_STATE_REMOVE);
        xev.xclient.data.l[1]		= wmFullScreen;
        xev.xclient.data.l[2]		= 0;

        XSendEvent(x11Display, DefaultRootWindow(x11Display), False, SubstructureRedirectMask | SubstructureNotifyMask, &xev);

        display = eglGetDisplay( (EGLNativeDisplayType)x11Display );
        break;
#endif
    case MODE_RAW:
    default:
        display = eglGetDisplay( (EGLNativeDisplayType)0 );
        break;
    }

    if( display == EGL_NO_DISPLAY )
    {
        printf( "GLES EGL Error: GL No Display\n" );
    }

    if( !eglInitialize( display, &majorVersion, &minorVersion ) )
    {
        printf( "GLES EGL Error: eglInitialize failed\n" );
    }

    if( !eglChooseConfig( display, attribList, &config, 1, &numConfigs ) )
    {
        printf( "GLES EGL Error: eglChooseConfig failed\n" );
    }

    context = eglCreateContext( display, config, NULL, NULL );
    if( context==0 )
    {
        printf( "GLES EGL Error: eglCreateContext failed\n" );
    }

    switch(pandora_driver_mode)
    {
#if defined(USE_X11)
    case MODE_X11:
        surface = eglCreateWindowSurface( display, config, (EGLNativeDisplayType)x11Window, NULL );
        break;
#endif
    case MODE_RAW:
    default:
        surface = eglCreateWindowSurface( display, config, (EGLNativeDisplayType)0, NULL );
        break;
    }

    eglMakeCurrent( display, surface, surface, context );
    if (!TestEGLError("eglMakeCurrent"))
        printf("error eglMakeCurrent");
    else
        printf("GLES Window Opened\n");
}

static Bool
make_x_window(struct app_data *data, const char *name,
              int x, int y, int width, int height)
{
   static const EGLint attribs[] = {
      EGL_RED_SIZE, 1,
      EGL_GREEN_SIZE, 1,
      EGL_BLUE_SIZE, 1,
      EGL_DEPTH_SIZE, 1,
      EGL_RENDERABLE_TYPE, EGL_OPENGL_ES_BIT,
      EGL_NONE
   };
   static const EGLint ctx_attribs[] = {
      EGL_CONTEXT_CLIENT_VERSION, 1,
      EGL_NONE
   };
   int scrnum;
   XSetWindowAttributes attr;
   unsigned long mask;
   Window root;
   Window win;
   XVisualInfo *visInfo, visTemplate;
   int num_visuals;
   EGLConfig config;
   EGLint num_configs;
   EGLint vid;

   scrnum = DefaultScreen( data->xdpy );
   root = RootWindow( data->xdpy, scrnum );

   if (!eglChooseConfig( data->dpy, attribs, &config, 1, &num_configs)) {
      printf("Error: couldn't get an EGL visual config\n");
      exit(1);
   }

   assert(config);
   assert(num_configs > 0);

   if (!eglGetConfigAttrib(data->dpy, config, EGL_NATIVE_VISUAL_ID, &vid)) {
      printf("Error: eglGetConfigAttrib() failed\n");
      exit(1);
   }

   /* The X window visual must match the EGL config */
   visTemplate.visualid = vid;
   visInfo = XGetVisualInfo(data->xdpy, VisualIDMask, &visTemplate, &num_visuals);
   if (!visInfo) {
      printf("Error: couldn't get X visual\n");
      exit(1);
   }

   /* window attributes */
   attr.background_pixel = 0;
   attr.border_pixel = 0;
   attr.colormap = XCreateColormap( data->xdpy, root, visInfo->visual, AllocNone);
   attr.event_mask = StructureNotifyMask | ExposureMask |
                     KeyPressMask | ButtonPressMask | ButtonMotionMask;
   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;

   win = XCreateWindow( data->xdpy, root, 0, 0, width * 2, height,
		        0, visInfo->depth, InputOutput,
		        visInfo->visual, mask, &attr );

   /* set hints and properties */
   {
      XSizeHints sizehints;
      sizehints.x = x;
      sizehints.y = y;
      sizehints.width  = width;
      sizehints.height = height;
      sizehints.flags = USSize | USPosition;
      XSetNormalHints(data->xdpy, win, &sizehints);
      XSetStandardProperties(data->xdpy, win, name, name,
                              None, (char **)NULL, 0, &sizehints);
   }

   data->canvas = win;

   attr.event_mask = 0x0;
   win = XCreateWindow( data->xdpy, win, width, 0, width, height,
		        0, visInfo->depth, InputOutput,
		        visInfo->visual, mask, &attr );
   data->cube = win;

   eglBindAPI(EGL_OPENGL_ES_API);

   data->ctx = eglCreateContext(data->dpy, config, EGL_NO_CONTEXT, ctx_attribs );
   if (!data->ctx) {
      printf("Error: eglCreateContext failed\n");
      exit(1);
   }

   data->surf = eglCreateWindowSurface(data->dpy, config, data->cube, NULL);
   if (!data->surf) {
      printf("Error: eglCreateWindowSurface failed\n");
      exit(1);
   }

   XFree(visInfo);

//.........这里部分代码省略.........

void AppLocal::CreateWindowSurface()
{
	LOG( "AppLocal::CreateWindowSurface()" );

	// Optionally force the window to a different resolution, which
	// will be automatically scaled up by the HWComposer.
	//
	// Useful for checking operation, but note that the "frame" is always in full
	// display resolution, while the source crop can be shrunk down:
	// adb shell dumpsys SurfaceFlinger
	//
	// Strangely, setting the format here doesn't actually change the window bit depth.
	// The window bit depth seems to be determined solely by the EGL config, presumably
	// on eglMakeCurrent.
	//
	// That also means that it can't be changed by localparms between leave / enter vr mode,
	// you need to quit all the way out to get the new value.
	if ( VrSettings.Use16BitFramebuffer )
	{
		const int displayPixelsWide = vrapi_GetSystemPropertyInt( &Java, VRAPI_SYS_PROP_DISPLAY_PIXELS_WIDE );
		const int displayPixelsHigh = vrapi_GetSystemPropertyInt( &Java, VRAPI_SYS_PROP_DISPLAY_PIXELS_HIGH );

		LOG( "ANativeWindow_setBuffersGeometry( %i, %i, %s )",
						displayPixelsWide, displayPixelsHigh,
						VrSettings.Use16BitFramebuffer ? "5:6:5" : "8:8:8:8" );
		ANativeWindow_setBuffersGeometry( nativeWindow, displayPixelsWide, displayPixelsHigh,
			VrSettings.Use16BitFramebuffer ? WINDOW_FORMAT_RGB_565 : WINDOW_FORMAT_RGBA_8888 );
	}

	EGLint attribs[16];
	int numAttribs = 0;

	// Set the colorspace on the window
	if ( VrSettings.UseSrgbFramebuffer )
	{
		attribs[numAttribs++] = EGL_GL_COLORSPACE_KHR;
		attribs[numAttribs++] = EGL_GL_COLORSPACE_SRGB_KHR;
	}
	attribs[numAttribs++] = EGL_NONE;

	// Android doesn't let the non-standard extensions show up in the
	// extension string, so we need to try it blind.
	windowSurface = eglCreateWindowSurface( glSetup.display, glSetup.config, nativeWindow, attribs );

	if ( windowSurface == EGL_NO_SURFACE )
	{
		const EGLint attribs2[] =
		{
			EGL_NONE
		};
		windowSurface = eglCreateWindowSurface( glSetup.display, glSetup.config, nativeWindow, attribs2 );
		if ( windowSurface == EGL_NO_SURFACE )
		{
			FAIL( "eglCreateWindowSurface failed: %s", GL_GetErrorString() );
		}
		FramebufferIsSrgb = false;
	}
	else
	{
		FramebufferIsSrgb = VrSettings.UseSrgbFramebuffer;
	}
	LOG( "nativeWindow %p gives surface %p", nativeWindow, windowSurface );

	if ( eglMakeCurrent( glSetup.display, windowSurface, windowSurface, glSetup.context ) == EGL_FALSE )
	{
		FAIL( "eglMakeCurrent failed: %s", GL_GetErrorString() );
	}
}

//----------------------------------------------------------------------------//
int main(int argc, char* argv[])
{
    // Create X11 window.
    Display* dpy = XOpenDisplay(0);
    int scn = DefaultScreen(dpy);
    Window wnd = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy),
                                     50, 50, 480, 320, 1,
                                     BlackPixel(dpy, scn),
                                     WhitePixel(dpy, scn));

    XSelectInput(dpy, wnd, StructureNotifyMask |
                           PointerMotionMask |
                           ButtonPressMask | ButtonReleaseMask |
                           KeyPressMask | KeyReleaseMask);
    XMapWindow(dpy, wnd);

    XEvent evt;
    while (true)
    {
        XNextEvent(dpy, &evt);
        if (evt.type == MapNotify)
            break;
    }

    // EGL setup
    EGLDisplay egldpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);

    EGLint majVer, minVer;
    eglInitialize(egldpy, &majVer, &minVer);

    EGLint attrs[] =
    {
        EGL_RED_SIZE,           8,
        EGL_GREEN_SIZE,         8,
        EGL_BLUE_SIZE,          8,
        EGL_RENDERABLE_TYPE,    EGL_OPENGL_ES_BIT,
        EGL_SURFACE_TYPE,       EGL_WINDOW_BIT,
        EGL_NONE
    };

    EGLConfig config;
    EGLint numconfigs;
    eglChooseConfig(egldpy, attrs, &config, 1, &numconfigs);

    EGLSurface surface =
        eglCreateWindowSurface(egldpy, config, (NativeWindowType)wnd, 0);

    EGLContext ctx = eglCreateContext(egldpy, config, 0, 0);
    eglMakeCurrent(egldpy, surface, surface, ctx);

    eglBindAPI(EGL_OPENGL_ES_API);

    // basic gl state setup;
    glViewport(0, 0, 480, 320);
    glClearColor(0.2, 0.2, 0.2, 1);

    // CEGUI setup
    CEGUI::OpenGLESRenderer::bootstrapSystem();
    initialiseResourceGroupDirectories();
    initialiseDefaultResourceGroups();

    CEGUI::SchemeManager::getSingleton().createFromFile("TaharezLook.scheme");
    CEGUI::System::getSingleton().getDefaultGUIContext().getMouseCursor().setDefaultImage("TaharezLook/MouseArrow");
    CEGUI::WindowManager& winMgr(CEGUI::WindowManager::getSingleton());
    CEGUI::Window* root = winMgr.createWindow("DefaultWindow", "root");
    CEGUI::Window* fw = root->createChild("TaharezLook/FrameWindow");
    fw->setPosition(CEGUI::UVector2(CEGUI::UDim(0.25, 0), CEGUI::UDim(0.25, 0)));
    fw->setSize(CEGUI::USize(CEGUI::UDim(0.5, 0), CEGUI::UDim(0.5, 0)));
    fw->setText("OpenGL ES 1 Test");

    CEGUI::System::getSingleton().getDefaultGUIContext().setRootWindow(root);

    // Main looop
    bool running = true;
    while (running)
    {
        while (XPending(dpy))
        {
            XNextEvent(dpy, &evt);

            switch (evt.type)
            {
            case KeyPress:
            {
                int kspkcr;
                KeySym* ks = XGetKeyboardMapping(dpy, evt.xkey.keycode, 1, &kspkcr);

                if (ks[0] == XK_Escape)
                    running = false;

                break;
            }

            case MotionNotify:
                CEGUI::System::getSingleton().getDefaultGUIContext().injectMousePosition(evt.xmotion.x, evt.xmotion.y);
                break;

            case ButtonPress:
            {
//.........这里部分代码省略.........

static int angle_init(struct MPGLContext *ctx, int flags)
{
    struct priv *p = ctx->priv;
    struct vo *vo = ctx->vo;

    if (!vo_w32_init(vo))
        goto fail;

    HDC dc = GetDC(vo_w32_hwnd(vo));
    if (!dc) {
        MP_FATAL(vo, "Couldn't get DC\n");
        goto fail;
    }

    PFNEGLGETPLATFORMDISPLAYEXTPROC eglGetPlatformDisplayEXT =
        (PFNEGLGETPLATFORMDISPLAYEXTPROC)eglGetProcAddress("eglGetPlatformDisplayEXT");
    if (!eglGetPlatformDisplayEXT) {
        MP_FATAL(vo, "Missing EGL_EXT_platform_base\n");
        goto fail;
    }

    EGLint d3d_types[] = {EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE,
                          EGL_PLATFORM_ANGLE_TYPE_D3D9_ANGLE};
    for (int i = 0; i < MP_ARRAY_SIZE(d3d_types); i++) {
        EGLint display_attributes[] = {
            EGL_PLATFORM_ANGLE_TYPE_ANGLE,
                d3d_types[i],
            EGL_PLATFORM_ANGLE_DEVICE_TYPE_ANGLE,
                EGL_PLATFORM_ANGLE_DEVICE_TYPE_HARDWARE_ANGLE,
            EGL_NONE,
        };

        p->egl_display = eglGetPlatformDisplayEXT(EGL_PLATFORM_ANGLE_ANGLE, dc,
            display_attributes);
        if (p->egl_display != EGL_NO_DISPLAY)
            break;
    }
    if (p->egl_display == EGL_NO_DISPLAY) {
        MP_FATAL(vo, "Couldn't get display\n");
        goto fail;
    }

    if (!eglInitialize(p->egl_display, NULL, NULL)) {
        MP_FATAL(vo, "Couldn't initialize EGL\n");
        goto fail;
    }

    eglBindAPI(EGL_OPENGL_ES_API);
    if (eglGetError() != EGL_SUCCESS) {
        MP_FATAL(vo, "Couldn't bind GLES API\n");
        goto fail;
    }

    EGLConfig config = select_fb_config_egl(ctx);
    if (!config)
        goto fail;

    p->egl_surface = eglCreateWindowSurface(p->egl_display, config,
                                            vo_w32_hwnd(vo), NULL);
    if (p->egl_surface == EGL_NO_SURFACE) {
        MP_FATAL(ctx->vo, "Could not create EGL surface!\n");
        goto fail;
    }

    if (!create_context_egl(ctx, config, 3) &&
        !create_context_egl(ctx, config, 2))
    {
        MP_FATAL(ctx->vo, "Could not create EGL context!\n");
        goto fail;
    }

    mpgl_load_functions(ctx->gl, get_proc_address, NULL, vo->log);

    return 0;

fail:
    angle_uninit(ctx);
    return -1;
}

//.........这里部分代码省略.........
         width  = new_width;
         height = new_height;
      }
   }
#endif

   RARCH_LOG("[X/EGL]: X = %d, Y = %d, W = %u, H = %u.\n",
         x_off, y_off, width, height);

   g_win = XCreateWindow(g_dpy, RootWindow(g_dpy, vi->screen),
         x_off, y_off, width, height, 0,
         vi->depth, InputOutput, vi->visual, 
         CWBorderPixel | CWColormap | CWEventMask | (true_full ? CWOverrideRedirect : 0), &swa);
   XSetWindowBackground(g_dpy, g_win, 0);

   g_egl_ctx = eglCreateContext(g_egl_dpy, g_egl_config, EGL_NO_CONTEXT,
         attr != egl_attribs ? egl_attribs : NULL);

   RARCH_LOG("[X/EGL]: Created context: %p.\n", (void*)g_egl_ctx);

   if (g_egl_ctx == EGL_NO_CONTEXT)
      goto error;

   if (g_use_hw_ctx)
   {
      g_egl_hw_ctx = eglCreateContext(g_egl_dpy, g_egl_config, g_egl_ctx,
            attr != egl_attribs ? egl_attribs : NULL);
      RARCH_LOG("[X/EGL]: Created shared context: %p.\n", (void*)g_egl_hw_ctx);

      if (g_egl_hw_ctx == EGL_NO_CONTEXT)
         goto error;
   }

   g_egl_surf = eglCreateWindowSurface(g_egl_dpy, g_egl_config, (EGLNativeWindowType)g_win, NULL);
   if (!g_egl_surf)
      goto error;

   if (!eglMakeCurrent(g_egl_dpy, g_egl_surf, g_egl_surf, g_egl_ctx))
      goto error;

   RARCH_LOG("[X/EGL]: Current context: %p.\n", (void*)eglGetCurrentContext());

   x11_set_window_attr(g_dpy, g_win);

   if (fullscreen)
      x11_show_mouse(g_dpy, g_win, false);

   if (true_full)
   {
      RARCH_LOG("[X/EGL]: Using true fullscreen.\n");
      XMapRaised(g_dpy, g_win);
   }
   else if (fullscreen) 
   {
      /* We attempted true fullscreen, but failed.
       * Attempt using windowed fullscreen. */
      XMapRaised(g_dpy, g_win);
      RARCH_LOG("[X/EGL]: Using windowed fullscreen.\n");

      /* We have to move the window to the screen we 
       * want to go fullscreen on first.
       * x_off and y_off usually get ignored in XCreateWindow().
       */
      x11_move_window(g_dpy, g_win, x_off, y_off, width, height);
      x11_windowed_fullscreen(g_dpy, g_win);
   }

static void init_ogl( void  )
{
  int32_t success;

   static EGL_DISPMANX_WINDOW_T nativewindow;

   DISPMANX_ELEMENT_HANDLE_T dispman_element;
   DISPMANX_DISPLAY_HANDLE_T dispman_display;
   DISPMANX_UPDATE_HANDLE_T dispman_update;
   VC_RECT_T dst_rect;
   VC_RECT_T src_rect;
   EGLBoolean result;
   
   // Change this to get without alpha to save some resources.
   static const EGLint attribute_list[] =
   {
      EGL_RED_SIZE, 8,
      EGL_GREEN_SIZE, 8,
      EGL_BLUE_SIZE, 8,
      EGL_ALPHA_SIZE, 0, // was 8
      EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
      EGL_NONE
   };

   static const EGLint context_attributes[] =
   {
     EGL_CONTEXT_CLIENT_VERSION, 2,
     EGL_NONE
   };
   
   EGLConfig config;
   EGLint num_config;

   bcm_host_init();
   
   // get an EGL display connection
   display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
   assert( display!=EGL_NO_DISPLAY );

   // initialize the EGL display connection
   result = eglInitialize( display, NULL, NULL);
   assert(EGL_FALSE != result);

   // get an appropriate EGL frame buffer configuration
   result = eglChooseConfig( display, attribute_list, &config, 1, &num_config);
   assert(EGL_FALSE != result);

   // get an appropriate EGL frame buffer configuration
   result = eglBindAPI(EGL_OPENGL_ES_API);
   assert(EGL_FALSE != result);
   
   // create an EGL rendering context
   context = eglCreateContext( display, config, EGL_NO_CONTEXT, context_attributes );
   assert( context != EGL_NO_CONTEXT );

   // create an EGL window surface
   success = graphics_get_display_size(0 /* LCD */, &screenWidth, &screenHeight);
   assert( success >= 0 );

   printf( "Screen size: %d x %d pixels\n", screenWidth, screenHeight );
   
   dst_rect.x = 0;
   dst_rect.y = 0;
   dst_rect.width = screenWidth;
   dst_rect.height = screenHeight;
      
   src_rect.x = 0;
   src_rect.y = 0;
   src_rect.width = screenWidth << 16;
   src_rect.height = screenHeight << 16;

   dispman_display = vc_dispmanx_display_open( 0 /* LCD */);
   dispman_update = vc_dispmanx_update_start( 0 );
         
   dispman_element = vc_dispmanx_element_add ( dispman_update, dispman_display,
      0/*layer*/, &dst_rect, 0/*src*/,
      &src_rect, DISPMANX_PROTECTION_NONE, 0 /*alpha*/, 0/*clamp*/, 0/*transform*/);
      
   nativewindow.element = dispman_element;
   nativewindow.width = screenWidth;
   nativewindow.height = screenHeight;
   vc_dispmanx_update_submit_sync( dispman_update );
      
   surface = eglCreateWindowSurface(  display, config, &nativewindow, NULL );
   assert(surface != EGL_NO_SURFACE);

   // connect the context to the surface
   result = eglMakeCurrent( display, surface, surface, context);
   assert(EGL_FALSE != result);

}

//.........这里部分代码省略.........

    EGLNativeWindowType eglWindow = 0;
    EGLDisplay eglDisplay = EGL_NO_DISPLAY;
    EGLSurface eglSurface = EGL_NO_SURFACE;
    EGLContext eglContext = EGL_NO_CONTEXT;

    EGLBoolean ret = eglBindAPI(EGL_OPENGL_ES_API);
    if (EGL_TRUE != ret)
        g_print("eglBindAPI() failed. [0x%x]\n", eglGetError());

    eglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
    if (EGL_NO_DISPLAY == eglDisplay)
        g_print("eglGetDisplay() failed. [0x%x]\n", eglGetError());

    EGLint major = 2;
    EGLint minor = 0;
    if (EGL_FALSE == eglInitialize(eglDisplay, &major, &minor) || EGL_SUCCESS != eglGetError())
        g_print("eglInitialize() failed. [0x%x]\n", eglGetError());

    g_print("EGL Version   :%s\n", eglQueryString(eglDisplay, EGL_VERSION));
    g_print("EGL Vendor    :%s\n", eglQueryString(eglDisplay, EGL_VENDOR));
    g_print("EGL Extensions:%s\n", eglQueryString(eglDisplay, EGL_EXTENSIONS));

    // Here, the application chooses the configuration it desires. In this
    // sample, we have a very simplified selection process, where we pick
    // the first EGLConfig that matches our criteria
    EGLint     eglNumConfigs = 0;
    EGLConfig  eglConfig;
    eglGetConfigs(eglDisplay, NULL, 0, &eglNumConfigs);
    g_print("eglNumConfigs = %i\n", eglNumConfigs);

    /*
    int i = 0;
    for (i = 0; i<eglNumConfigs; ++i) {
        EGLint samples = 0;
        //if (EGL_FALSE == eglGetConfigAttrib(eglDisplay, eglConfig[i], EGL_SAMPLES, &samples))
        //    printf("eglGetConfigAttrib in loop for an EGL_SAMPLES fail at i = %i\n", i);
        if (EGL_FALSE == eglGetConfigAttrib(eglDisplay, eglConfig[i], EGL_SAMPLE_BUFFERS, &samples))
            printf("eglGetConfigAttrib in loop for an  EGL_SAMPLE_BUFFERS fail at i = %i\n", i);

        if (samples > 0)
            printf("sample found: %i\n", samples);

    }
    eglGetConfigs(eglDisplay, configs, num_config[0], num_config))
    */

    // Here specify the attributes of the desired configuration.
    // Below, we select an EGLConfig with at least 8 bits per color
    // component compatible with on-screen windows
    const EGLint eglConfigList[] = {
        EGL_SURFACE_TYPE,    EGL_WINDOW_BIT,
        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,

        EGL_RED_SIZE,        8,
        EGL_GREEN_SIZE,      8,
        EGL_BLUE_SIZE,       8,

        EGL_NONE
    };

    if (EGL_FALSE == eglChooseConfig(eglDisplay, eglConfigList, &eglConfig, 1, &eglNumConfigs))
        g_print("eglChooseConfig() failed. [0x%x]\n", eglGetError());
    if (0 == eglNumConfigs)
        g_print("eglChooseConfig() eglNumConfigs no matching config [0x%x]\n", eglGetError());

	eglWindow = (EGLNativeWindowType) gtk_widget_get_window(engine->window);
    if (FALSE == eglWindow) {
        g_print("ERROR: EGLNativeWindowType is NULL (can't draw)\n");
        g_assert(0);
    }
    g_print("DEBUG: eglDisplay  =0X%X\n", (guint)eglDisplay);
    g_print("DEBUG: eglConfig   =0X%X\n", (guint)eglConfig);
    g_print("DEBUG: eglWindowXID=0X%X\n", (guint)GDK_WINDOW_XID(eglWindow));

    eglSurface = eglCreateWindowSurface(eglDisplay, eglConfig, GDK_WINDOW_XID(gtk_widget_get_window(engine->window)), NULL);
    if (EGL_NO_SURFACE == eglSurface || EGL_SUCCESS != eglGetError())
        g_print("eglCreateWindowSurface() failed. EGL_NO_SURFACE [0x%x]\n", eglGetError());

    // Then we can create the context and set it current:
    EGLint eglContextList[] = {
        EGL_CONTEXT_CLIENT_VERSION, 2,
        EGL_NONE
    };
    eglContext = eglCreateContext(eglDisplay, eglConfig, EGL_NO_CONTEXT, eglContextList);
    if (EGL_NO_CONTEXT == eglContext || EGL_SUCCESS != eglGetError())
        g_print("eglCreateContext() failed. [0x%x]\n", eglGetError());

    if (EGL_FALSE == eglMakeCurrent(eglDisplay, eglSurface, eglSurface, eglContext))
        g_print("Unable to eglMakeCurrent()\n");

    engine->eglDisplay = eglDisplay;
    engine->eglContext = eglContext;
    engine->eglSurface = eglSurface;
    engine->eglWindow  = eglWindow;

    g_print("s52egl:_egl_init(): end ..\n");

    return 1;
}

    void EGLRuntime::initializeEGL(OpenGLESVersion requestedAPIVersion)
    {
        Platform* platform = Platform::getInstance();

        EGLBoolean success = EGL_FALSE;

#if defined(_WIN32)
        /* Win32 */
        display = eglGetDisplay(platform->deviceContext);
#elif defined(__arm__)
        /* Linux on ARM */
        display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
#else
        /* Desktop Linux */
        platform->display = XOpenDisplay(NULL);
        display = eglGetDisplay(platform->display);
#endif

        if(display == EGL_NO_DISPLAY)
        {
            EGLint error = eglGetError();
            LOGE("eglGetError(): %i (0x%.4x)\n", (int)error, (int)error);
            LOGE("No EGL Display available at %s:%i\n", __FILE__, __LINE__);
            exit(1);
        }

        /* Initialize EGL. */
        success = eglInitialize(display, NULL, NULL);
        if(success != EGL_TRUE)
        {
            EGLint error = eglGetError();
            LOGE("eglGetError(): %i (0x%.4x)\n", (int)error, (int)error);
            LOGE("Failed to initialize EGL at %s:%i\n", __FILE__, __LINE__);
            exit(1);
        }

        /* Depending on app-requested EGL attributes, tweak the attributes we pass to EGL. */
        if(requestedAPIVersion == OPENGLES1)
        {
            configAttributes[15] = EGL_OPENGL_ES_BIT;
            contextAttributes[1] = 1;
        }
        else if(requestedAPIVersion == OPENGLES2)
        {
            configAttributes[15] = EGL_OPENGL_ES2_BIT;
            contextAttributes[1] = 2;
        }
        /*
         * Despite the fact an OpenGL ES 3.0 config is required, we request configs using the OpenGL_ES2_BIT.
         * At the time of writing there is no OpenGL_ES3_BIT, and so platforms return
         * OpenGL ES 3.0 configs with the OpenGL_ES2_BIT set.
         * We request a context with EGL_CONTEXT_CLIENT_VERSION of 3 (OpenGL ES 3.0) which will ensure that
         * OpenGL ES 3.0 features are supported.
         */
        else if (requestedAPIVersion == OPENGLES3)
        {
            configAttributes[15] = EGL_OPENGL_ES2_BIT;
            contextAttributes[1] = 3;
        }

        /*
         * Find a matching config and store it in our static variable.
         * On ARM devices perform a strict match to ensure we get the best performance.
         * On desktop devices perform a loose match to ensure greatest compatability.
         */
#if defined(__arm__)
        config = findConfig(true);
#else
        config = findConfig(false);
#endif

#if defined(__linux__) && !defined(__arm__)
        ((DesktopLinuxPlatform*)(platform))->createX11Window();
#endif

        /* Create a surface. */
        surface = eglCreateWindowSurface(display, config, (EGLNativeWindowType)(platform->window), windowAttributes);
        if(surface == EGL_NO_SURFACE)
        {
            EGLint error = eglGetError();
            LOGE("eglGetError(): %i (0x%.4x)\n", (int)error, (int)error);
            LOGE("Failed to create EGL surface at %s:%i\n", __FILE__, __LINE__);
            exit(1);
        }

        /* Unconditionally bind to OpenGL ES API as we exit this function, since it's the default. */
        eglBindAPI(EGL_OPENGL_ES_API);

        context = eglCreateContext(display, config, EGL_NO_CONTEXT, contextAttributes);
        if(context == EGL_NO_CONTEXT)
        {
            EGLint error = eglGetError();
            LOGE("eglGetError(): %i (0x%.4x)\n", (int)error, (int)error);
            LOGE("Failed to create EGL context at %s:%i\n", __FILE__, __LINE__);
            exit(1);
        }
    }

static bool gfx_ctx_set_video_mode(
      unsigned width, unsigned height,
      bool fullscreen)
{
   if (g_inited)
      return false;

   int ret = 0;
   struct drm_fb *fb = NULL;

   struct sigaction sa = {{0}};
   sa.sa_handler = sighandler;
   sa.sa_flags   = SA_RESTART;
   sigemptyset(&sa.sa_mask);
   sigaction(SIGINT, &sa, NULL);
   sigaction(SIGTERM, &sa, NULL);

#define EGL_ATTRIBS_BASE \
   EGL_SURFACE_TYPE,    EGL_WINDOW_BIT, \
   EGL_RED_SIZE,        0, \
   EGL_GREEN_SIZE,      0, \
   EGL_BLUE_SIZE,       0, \
   EGL_DEPTH_SIZE,      0, \
   EGL_STENCIL_SIZE,    0

   static const EGLint egl_attribs_gl[] = {
      EGL_ATTRIBS_BASE,
      EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
      EGL_NONE,
   };

   static const EGLint egl_attribs_gles[] = {
      EGL_ATTRIBS_BASE,
      EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
      EGL_NONE,
   };

   static const EGLint egl_attribs_vg[] = {
      EGL_ATTRIBS_BASE,
      EGL_RENDERABLE_TYPE, EGL_OPENVG_BIT,
      EGL_NONE,
   };

   // GLES 2.0. Don't use for any other API.
   static const EGLint gles_context_attribs[] = {
      EGL_CONTEXT_CLIENT_VERSION, 2,
      EGL_NONE
   };

   const EGLint *attrib_ptr;
   switch (g_api)
   {
      case GFX_CTX_OPENGL_API:
         attrib_ptr = egl_attribs_gl;
         break;
      case GFX_CTX_OPENGL_ES_API:
         attrib_ptr = egl_attribs_gles;
         break;
      case GFX_CTX_OPENVG_API:
         attrib_ptr = egl_attribs_vg;
         break;
      default:
         attrib_ptr = NULL;
   }

   g_egl_dpy = eglGetDisplay((EGLNativeDisplayType)g_gbm_dev);
   if (!g_egl_dpy)
   {
      RARCH_ERR("[KMS/EGL]: Couldn't get EGL display.\n");
      goto error;
   }

   EGLint major, minor;
   if (!eglInitialize(g_egl_dpy, &major, &minor))
      goto error;

   EGLint n;
   if (!eglChooseConfig(g_egl_dpy, attrib_ptr, &g_config, 1, &n) || n != 1)
      goto error;

   g_egl_ctx = eglCreateContext(g_egl_dpy, g_config, EGL_NO_CONTEXT, (g_api == GFX_CTX_OPENGL_ES_API) ? gles_context_attribs : NULL);
   if (!g_egl_ctx)
      goto error;

   g_egl_surf = eglCreateWindowSurface(g_egl_dpy, g_config, (EGLNativeWindowType)g_gbm_surface, NULL);
   if (!g_egl_surf)
      goto error;

   if (!eglMakeCurrent(g_egl_dpy, g_egl_surf, g_egl_surf, g_egl_ctx))
      goto error;

   glClear(GL_COLOR_BUFFER_BIT);
   eglSwapBuffers(g_egl_dpy, g_egl_surf);

   g_bo = gbm_surface_lock_front_buffer(g_gbm_surface);
   fb = drm_fb_get_from_bo(g_bo);

   ret = drmModeSetCrtc(g_drm_fd, g_crtc_id, fb->fb_id, 0, 0, &g_connector_id, 1, g_drm_mode);
   if (ret < 0)
      goto error;
//.........这里部分代码省略.........

	// Init the device
	void Device::InitWindow(int width, int height)
	{
		this->width = width;
		this->height = height;

		Logger::Info("Device", "Init Windows (%d - %d)", width, height);

#ifdef WIN32

		windowHandler = CreateWin("OpenGLES Window", (int) (width * WINDOW_SCALE),  (int) (height * WINDOW_SCALE));

		EGLint attribList[] =
		{
			EGL_RED_SIZE,       5,
			EGL_GREEN_SIZE,     6,
			EGL_BLUE_SIZE,      5,
			EGL_ALPHA_SIZE,     EGL_DONT_CARE,
			EGL_DEPTH_SIZE,     8,
			EGL_STENCIL_SIZE,   EGL_DONT_CARE,
			EGL_SAMPLE_BUFFERS, 0,
			EGL_NONE
		};

		EGLint numConfigs;
		EGLint majorVersion;
		EGLint minorVersion;	
		EGLConfig config;
		EGLint contextAttribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE, EGL_NONE };

		// Get Display
		display = eglGetDisplay(GetDC(windowHandler));

		if ( display == EGL_NO_DISPLAY )
		{
			Logger::Error("OpenGLESDevice", "Couldn't Get Display");
			return;
		}

		// Initialize EGL
		if ( !eglInitialize(display, &majorVersion, &minorVersion) )
		{
			Logger::Error("OpenGLESDevice", "Couldn't Initialize Display");
			return;
		}

		// Get configs
		if ( !eglGetConfigs(display, NULL, 0, &numConfigs) )
		{
			Logger::Error("OpenGLESDevice", "Couldn't Get Config");
			return;
		}

		// Choose config
		if ( !eglChooseConfig(display, attribList, &config, 1, &numConfigs) )
		{
			Logger::Error("OpenGLESDevice", "Couldn't Choose Config");
			return;
		}

		// Create a surface
		surface = eglCreateWindowSurface(display, config, (EGLNativeWindowType) windowHandler, NULL);
		if ( surface == EGL_NO_SURFACE )
		{
			Logger::Error("OpenGLESDevice", "Couldn't Create Window Surface");
			return;
		}

		// Create a GL context
		context = eglCreateContext(display, config, EGL_NO_CONTEXT, contextAttribs );

		if ( context == EGL_NO_CONTEXT )
		{
			Logger::Error("OpenGLESDevice", "Couldn't Get Context");
			return;
		}   

		// Make the context current
		if ( !eglMakeCurrent(display, surface, surface, context) )
		{
			Logger::Error("OpenGLESDevice", "Couldn't Make Current Display");
			return;
		}
#endif // if WIN32

		graphics = new Graphics(width, height);
	}

	bool AndroidWindow::CreateGLContext(unsigned int major, unsigned int minor)
	{
		EGLConfig config;
		EGLint eglMajor;
		EGLint eglMinor;
		EGLint contextAttribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE };

		if (!eglInitialize(mDisplay, &eglMajor, &eglMinor))
		{
			LogError("Unable to initialize EGL", 0);
			return false;
		}

		EGLint numConfigs = 0;
		EGLint attribList[] =
		{
			EGL_RED_SIZE,       8,
			EGL_GREEN_SIZE,     8,
			EGL_BLUE_SIZE,      8,
			EGL_ALPHA_SIZE,     (mParameters.ColorBits == 32) ? 8 : EGL_DONT_CARE,
			EGL_DEPTH_SIZE,     (mParameters.DepthBits > 0) ? mParameters.DepthBits : EGL_DONT_CARE,
			EGL_STENCIL_SIZE,   (mParameters.StencilBits > 0) ? mParameters.StencilBits : EGL_DONT_CARE,
			EGL_SAMPLE_BUFFERS, (mParameters.MSAA > 0) ? mParameters.MSAA : 0,
			EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
			EGL_NONE
		};

		if (!eglChooseConfig(mDisplay, attribList, &config, 1, &numConfigs))
		{
			LogError("Unable to choose EGL Config", 0);
			return false;
		}

		if (numConfigs < 1)
		{
			LogError("No valid EGL config found", 0);
			return false;
		}

		EGLint format = 0;

		eglGetConfigAttrib(mDisplay, config, EGL_NATIVE_VISUAL_ID, &format);
		ANativeWindow_setBuffersGeometry(mNativeWindow, 0, 0, format);

		mSurface = eglCreateWindowSurface(mDisplay, config,
			mNativeWindow, NULL);

		if (mSurface == EGL_NO_SURFACE)
		{
			LogError("Unable to create EGL window surface", 0);
			return false;
		}

		mContext = eglCreateContext(mDisplay, config,
			EGL_NO_CONTEXT, contextAttribs);

		if (mContext == EGL_NO_CONTEXT)
		{
			LogError("Unable to create EGL context", 0);
			return false;
		}

		if (!eglMakeCurrent(mDisplay, mSurface, mSurface, mContext))
		{
			LogError("Unable to make EGL context current", 0);
			return false;
		}

		return true;
	}

static bool gfx_ctx_emscripten_init(void *data)
{
    EGLint width, height, num_config;
    static const EGLint attribute_list[] =
    {
        EGL_RED_SIZE, 8,
        EGL_GREEN_SIZE, 8,
        EGL_BLUE_SIZE, 8,
        EGL_ALPHA_SIZE, 8,
        EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
        EGL_NONE
    };
    static const EGLint context_attributes[] =
    {
        EGL_CONTEXT_CLIENT_VERSION, 2,
        EGL_NONE
    };

    (void)data;

    RARCH_LOG("[EMSCRIPTEN/EGL]: Initializing...\n");

    if (g_inited)
    {
        RARCH_LOG("[EMSCRIPTEN/EGL]: Attempted to re-initialize driver.\n");
        return true;
    }

    /* Get an EGL display connection. */
    g_egl_dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
    if (!g_egl_dpy)
        goto error;

    /* Initialize the EGL display connection. */
    if (!eglInitialize(g_egl_dpy, NULL, NULL))
        goto error;

    /* Get an appropriate EGL frame buffer configuration. */
    if (!eglChooseConfig(g_egl_dpy, attribute_list, &g_egl_config, 1, &num_config))
        goto error;

    /* Create an EGL rendering context. */
    g_egl_ctx = eglCreateContext(g_egl_dpy, g_egl_config, EGL_NO_CONTEXT, context_attributes);
    if (!g_egl_ctx)
        goto error;

    /* create an EGL window surface. */
    g_egl_surf = eglCreateWindowSurface(g_egl_dpy, g_egl_config, 0, NULL);
    if (!g_egl_surf)
        goto error;

    /* Connect the context to the surface. */
    if (!eglMakeCurrent(g_egl_dpy, g_egl_surf, g_egl_surf, g_egl_ctx))
        goto error;

    eglQuerySurface(g_egl_dpy, g_egl_surf, EGL_WIDTH, &width);
    eglQuerySurface(g_egl_dpy, g_egl_surf, EGL_HEIGHT, &height);
    g_fb_width = width;
    g_fb_height = height;
    RARCH_LOG("[EMSCRIPTEN/EGL]: Dimensions: %ux%u\n", width, height);

    return true;

error:
    gfx_ctx_emscripten_destroy(data);
    return false;
}

bool CompoGraphicsContext::init( void *surfacePtr )
{
  JNIEnv *env;
  JavaVM *vm = CompoBridge->getVM(); 
  
  CompoScopedJNI(vm, &env);
  
  ANativeWindow *window = 
    ANativeWindow_fromSurface(env, (jobject) surfacePtr);
  
  LOGI("-- Initializing OpenGL Context --");

  if ((mDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY)) == EGL_NO_DISPLAY)
  {
    LOGE("eglGetDisplay returned error %d", eglGetError());
    return false;
  }
  else {
    LOGI("eglGetDisplay SUCCEDED [0x%X]", (unsigned) mDisplay);
  }
  
  const EGLint attributes [] = {
    EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
    EGL_BLUE_SIZE, 8,
    EGL_GREEN_SIZE, 8,
    EGL_RED_SIZE, 8,
    EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
    EGL_DEPTH_SIZE, 16,
    EGL_NONE
  };

  if (!eglInitialize(mDisplay, 0, 0)) {
    LOGE("eglInitialze returned error %d", eglGetError());
    return false;
  }
  
  EGLint numConfigs;
  EGLint format;
  if (!eglChooseConfig(mDisplay, attributes, &mConfig, 1, &numConfigs)) {
    LOGE("eglChooseConfig() returned error %d", eglGetError());
    this->destroy();
    return false;
  } 
  
  if (!eglGetConfigAttrib(mDisplay, mConfig, EGL_NATIVE_VISUAL_ID, &format))
  {
    LOGE("eglGetConfigAttrib returned error %d", eglGetError());
    this->destroy();
    return false;
  }
  
  ANativeWindow_setBuffersGeometry(window, 0, 0, format);

  if ((mSurface = eglCreateWindowSurface(mDisplay, mConfig, window, 0))
      == EGL_NO_SURFACE) 
  { 
    LOGE("eglCreateWindowSurface returned error %d", eglGetError()); 
    this->destroy();
    return false;
  }
  EGLint contextAttributes [] = {
    EGL_CONTEXT_CLIENT_VERSION, 2,
    EGL_NONE
  }; 

  if ((mContext = eglCreateContext(mDisplay, mConfig, 0, contextAttributes))
     == EGL_NO_CONTEXT)
  {
    LOGE("eglCreateContext returned error %d", eglGetError());
    this->destroy();
    return false;
  }
  else
  {
    LOGI("eglCreateContext create [0x%X]", (unsigned) mContext);
  }

  if (!eglMakeCurrent(mDisplay, mSurface, mSurface, mContext)) {
    LOGE("eglMakeCurrent() returned error %d", eglGetError());
    this->destroy();
    return false;
  }
  
  EGLint width, height;
  if (!eglQuerySurface(mDisplay, mSurface, EGL_WIDTH, &width) ||
      !eglQuerySurface(mDisplay, mSurface, EGL_HEIGHT, &height)) {
    LOGE("eglQuerySurface() returned error %d", eglGetError());
    this->destroy();
    return false;
  }
  else {
    mWidth = width;
    mHeight = height;
    LOGI("Surface Initialized %dx%d", width, height);
  }

  glDisable(GL_DITHER);
  glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
  glClearDepthf(1.0f);
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//.........这里部分代码省略.........