path: root/Source/Plugins/Plugin_VideoOGL/Src/GLUtil.cpp

// Copyright (C) 2003 Dolphin Project.

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/

#include "Globals.h"
#include "VideoConfig.h"
#include "IniFile.h"
#include "svnrev.h"
#include "Setup.h"

#include "Render.h"

#if defined(_WIN32)
#include "OS/Win32.h"
#else
struct RECT
{
	int left, top;
	int right, bottom;
};
#endif

#include "GLUtil.h"

// Handles OpenGL and the window

// Window dimensions.
static int s_backbuffer_width;
static int s_backbuffer_height;

#ifndef _WIN32
GLWindow GLWin;
#endif

#if defined(_WIN32)
static HDC hDC = NULL;       // Private GDI Device Context
static HGLRC hRC = NULL;       // Permanent Rendering Context
extern HINSTANCE g_hInstance;
#endif

void OpenGL_SwapBuffers()
{
#if defined(USE_WX) && USE_WX
	GLWin.glCanvas->SwapBuffers();
#elif defined(HAVE_COCOA) && HAVE_COCOA
	cocoaGLSwap(GLWin.cocoaCtx,GLWin.cocoaWin);
#elif defined(_WIN32)
	SwapBuffers(hDC);
#elif defined(HAVE_X11) && HAVE_X11
	glXSwapBuffers(GLWin.dpy, GLWin.win);
#endif
}

u32 OpenGL_GetBackbufferWidth() 
{
	return s_backbuffer_width;
}

u32 OpenGL_GetBackbufferHeight() 
{
	return s_backbuffer_height;
}

void OpenGL_SetWindowText(const char *text)
{
#if defined(USE_WX) && USE_WX
	GLWin.frame->SetTitle(wxString::FromAscii(text));
#elif defined(HAVE_COCOA) && HAVE_COCOA
	cocoaGLSetTitle(GLWin.cocoaWin, text);
#elif defined(_WIN32)
	// TODO convert text to unicode and change SetWindowTextA to SetWindowText
	SetWindowTextA(EmuWindow::GetWnd(), text);
#elif defined(HAVE_X11) && HAVE_X11 // GLX
	// Tell X to ask the window manager to set the window title. (X
	// itself doesn't provide window title functionality.)
	XStoreName(GLWin.dpy, GLWin.win, text);
#endif
}

// Draw messages on top of the screen
unsigned int Callback_PeekMessages()
{
#ifdef _WIN32
	// TODO: peekmessage
	MSG msg;
	while (PeekMessage(&msg, 0, 0, 0, PM_REMOVE))
	{
		if (msg.message == WM_QUIT)
			return FALSE;
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return TRUE;
#else
	return FALSE;
#endif
}

// Show the current FPS
void UpdateFPSDisplay(const char *text)
{
	char temp[512];
	sprintf(temp, "%s: GL: %s", SVN_REV_STR, text);
	OpenGL_SetWindowText(temp);
}

#if defined(HAVE_X11) && HAVE_X11
THREAD_RETURN XEventThread(void *pArg);

void X11_EWMH_Fullscreen(int action)
{
	_assert_(action == _NET_WM_STATE_REMOVE || action == _NET_WM_STATE_ADD
			|| action == _NET_WM_STATE_TOGGLE);

	// Init X event structure for _NET_WM_STATE_FULLSCREEN client message
	XEvent event;
	event.xclient.type = ClientMessage;
	event.xclient.message_type = XInternAtom(GLWin.dpy, "_NET_WM_STATE", False);
	event.xclient.window = GLWin.win;
	event.xclient.format = 32;
	event.xclient.data.l[0] = action;
	event.xclient.data.l[1] = XInternAtom(GLWin.dpy, "_NET_WM_STATE_FULLSCREEN", False);

	// Send the event
	if (!XSendEvent(GLWin.dpy, DefaultRootWindow(GLWin.dpy), False,
				SubstructureRedirectMask | SubstructureNotifyMask, &event))
		ERROR_LOG(VIDEO, "Failed to switch fullscreen/windowed mode.\n");
}

void CreateXWindow (void)
{
	Atom wmProtocols[3];
	Window parent;

#if defined(HAVE_GTK2) && HAVE_GTK2 && defined(wxGTK)
	wxMutexGuiEnter();
#endif
#if defined(HAVE_XRANDR) && HAVE_XRANDR
	if (GLWin.fs && !GLWin.renderToMain)
		XRRSetScreenConfig(GLWin.dpy, GLWin.screenConfig, RootWindow(GLWin.dpy, GLWin.screen),
				GLWin.fullSize, GLWin.screenRotation, CurrentTime);
#endif
#if defined(HAVE_GTK2) && HAVE_GTK2 && defined(wxGTK)
	if (GLWin.renderToMain)
	{
		GLWin.panel->GetSize((int *)&GLWin.width, (int *)&GLWin.height);
		GLWin.panel->GetPosition(&GLWin.x, &GLWin.y);
		parent = GDK_WINDOW_XID(GTK_WIDGET(GLWin.panel->GetHandle())->window);
		GLWin.panel->SetFocus();
	}
	else
#endif
	{
		GLWin.x = 0;
		GLWin.y = 0;
		GLWin.width = GLWin.winWidth;
		GLWin.height = GLWin.winHeight;
		parent = RootWindow(GLWin.dpy, GLWin.vi->screen);
	}

	// Control window size and picture scaling
	s_backbuffer_width = GLWin.width;
	s_backbuffer_height = GLWin.height;

	// create the window
	GLWin.win = XCreateWindow(GLWin.dpy, parent,
			GLWin.x, GLWin.y, GLWin.width, GLWin.height, 0, GLWin.vi->depth, InputOutput, GLWin.vi->visual,
			CWBorderPixel | CWBackPixel | CWColormap | CWEventMask, &GLWin.attr);
	wmProtocols[0] = XInternAtom(GLWin.dpy, "WM_DELETE_WINDOW", True);
	wmProtocols[1] = XInternAtom(GLWin.dpy, "_NET_WM_STATE", False);
	wmProtocols[2] = XInternAtom(GLWin.dpy, "_NET_WM_STATE_FULLSCREEN", False);
	XSetWMProtocols(GLWin.dpy, GLWin.win, wmProtocols, 3);
	XSetStandardProperties(GLWin.dpy, GLWin.win, "GPU", "GPU", None, NULL, 0, NULL);
	XMapRaised(GLWin.dpy, GLWin.win);
	XSync(GLWin.dpy, True);
#if defined(HAVE_GTK2) && HAVE_GTK2 && defined(wxGTK)
	wxMutexGuiLeave();
#endif

	if (g_Config.bHideCursor)
	{
		// make a blank cursor
		Pixmap Blank;
		XColor DummyColor;
		char ZeroData[1] = {0};
		Blank = XCreateBitmapFromData (GLWin.dpy, GLWin.win, ZeroData, 1, 1);
		GLWin.blankCursor = XCreatePixmapCursor(GLWin.dpy, Blank, Blank, &DummyColor, &DummyColor, 0, 0);
		XFreePixmap (GLWin.dpy, Blank);
	}

	GLWin.xEventThread = new Common::Thread(XEventThread, NULL);
}

void DestroyXWindow(void)
{
	if( GLWin.ctx )
	{
		if( !glXMakeCurrent(GLWin.dpy, None, NULL))
		{
			printf("Could not release drawing context.\n");
		}
	}
	/* switch back to original desktop resolution if we were in fullscreen */
	if( GLWin.fs )
	{
#if defined(HAVE_XRANDR) && HAVE_XRANDR
		XRRSetScreenConfig(GLWin.dpy, GLWin.screenConfig, RootWindow(GLWin.dpy, GLWin.screen),
				GLWin.deskSize, GLWin.screenRotation, CurrentTime);
#if defined(HAVE_GTK2) && HAVE_GTK2 && defined(wxGTK)
		if (!GLWin.renderToMain)
#endif
			X11_EWMH_Fullscreen(_NET_WM_STATE_REMOVE); 
#endif
	}
	XUndefineCursor(GLWin.dpy, GLWin.win);
	XUnmapWindow(GLWin.dpy, GLWin.win);
	GLWin.win = 0;
}

void ToggleFullscreenMode (void)
{
	GLWin.fs = !GLWin.fs;
#if defined(HAVE_XRANDR) && HAVE_XRANDR
	if (GLWin.fs)
		XRRSetScreenConfig(GLWin.dpy, GLWin.screenConfig, RootWindow(GLWin.dpy, GLWin.screen),
				GLWin.fullSize, GLWin.screenRotation, CurrentTime);
	else
		XRRSetScreenConfig(GLWin.dpy, GLWin.screenConfig, RootWindow(GLWin.dpy, GLWin.screen),
				GLWin.deskSize, GLWin.screenRotation, CurrentTime);
#endif
#if defined(HAVE_GTK2) && HAVE_GTK2 && defined(wxGTK)
	if (!GLWin.renderToMain)
#endif
	{
		X11_EWMH_Fullscreen(_NET_WM_STATE_TOGGLE); 
		XRaiseWindow(GLWin.dpy, GLWin.win);
		XSetInputFocus(GLWin.dpy, GLWin.win, RevertToPointerRoot, CurrentTime);
	}
	XSync(GLWin.dpy, False);
}

THREAD_RETURN XEventThread(void *pArg)
{
	bool bPaused = False;
	while (GLWin.win)
	{
		XEvent event;
		KeySym key;
		for (int num_events = XPending(GLWin.dpy); num_events > 0; num_events--) {
			XNextEvent(GLWin.dpy, &event);
			switch(event.type) {
				case KeyPress:
					key = XLookupKeysym((XKeyEvent*)&event, 0);
					switch (key)
					{
						case XK_F1: case XK_F2: case XK_F3: case XK_F4: case XK_F5: case XK_F6:
						case XK_F7: case XK_F8: case XK_F9: case XK_F11: case XK_F12:
							g_VideoInitialize.pKeyPress(key - 0xff4e,
									event.xkey.state & ShiftMask,
									event.xkey.state & ControlMask);
							break;
						case XK_Escape:
							if (GLWin.fs && !bPaused)
							{
								printf("toggling fullscreen\n");
								ToggleFullscreenMode();
							}
							g_VideoInitialize.pKeyPress(0x1c, False, False);
							break;
						case XK_Return:
							if (event.xkey.state & Mod1Mask)
								ToggleFullscreenMode();
							break;
						case XK_3:
							OSDChoice = 1;
							// Toggle native resolution
							if (!(g_Config.bNativeResolution || g_Config.b2xResolution))
								g_Config.bNativeResolution = true;
							else if (g_Config.bNativeResolution && Renderer::AllowCustom())
							{ g_Config.bNativeResolution = false; if (Renderer::Allow2x()) {g_Config.b2xResolution = true;} }
							else if (Renderer::AllowCustom())
								g_Config.b2xResolution = false;
							break;
						case XK_4:
							OSDChoice = 2;
							// Toggle aspect ratio
							g_Config.iAspectRatio = (g_Config.iAspectRatio + 1) & 3;
							break;
						case XK_5:
							OSDChoice = 3;
							// Toggle EFB copy
							if (g_Config.bEFBCopyDisable || g_Config.bCopyEFBToTexture)
							{
								g_Config.bEFBCopyDisable = !g_Config.bEFBCopyDisable;
								g_Config.bCopyEFBToTexture = false;
							}
							else
							{
								g_Config.bCopyEFBToTexture = !g_Config.bCopyEFBToTexture;
							}
							break;
						case XK_6:
							OSDChoice = 4;
							g_Config.bDisableFog = !g_Config.bDisableFog;
							break;
						case XK_7:
							OSDChoice = 5;
							g_Config.bDisableLighting = !g_Config.bDisableLighting;
							break;
						default:
							break;
					}
					break;
				case FocusIn:
					if (g_Config.bHideCursor && !bPaused && !GLWin.renderToMain)
						XDefineCursor(GLWin.dpy, GLWin.win, GLWin.blankCursor);
					break;
				case FocusOut:
					if (g_Config.bHideCursor && !bPaused && !GLWin.renderToMain)
						XUndefineCursor(GLWin.dpy, GLWin.win);
					break;
				case ConfigureNotify:
					Window winDummy;
					unsigned int borderDummy;
					XGetGeometry(GLWin.dpy, GLWin.win, &winDummy, &GLWin.x, &GLWin.y,
							&GLWin.width, &GLWin.height, &borderDummy, &GLWin.depth);
					s_backbuffer_width = GLWin.width;
					s_backbuffer_height = GLWin.height;
					// Save windowed mode size for return from fullscreen
					if (!GLWin.fs)
					{
						GLWin.winWidth = GLWin.width;
						GLWin.winHeight = GLWin.height;
					}
					break;
				case ClientMessage:
					if ((ulong) event.xclient.data.l[0] == XInternAtom(GLWin.dpy, "WM_DELETE_WINDOW", False))
						g_VideoInitialize.pKeyPress(0x1b, False, False);
					if ((ulong) event.xclient.data.l[0] == XInternAtom(GLWin.dpy, "TOGGLE_FULLSCREEN", False))
						ToggleFullscreenMode();
					if (g_Config.bHideCursor && 
							(ulong) event.xclient.data.l[0] == XInternAtom(GLWin.dpy, "PAUSE", False))
					{
						bPaused = True;
						XUndefineCursor(GLWin.dpy, GLWin.win);
					}
					if (g_Config.bHideCursor && 
							(ulong) event.xclient.data.l[0] == XInternAtom(GLWin.dpy, "RESUME", False))
					{
						bPaused = False;
						XDefineCursor(GLWin.dpy, GLWin.win, GLWin.blankCursor);
					}
#if defined(HAVE_GTK2) && HAVE_GTK2 && defined(wxGTK)
					if (GLWin.renderToMain &&
							(ulong) event.xclient.data.l[0] == XInternAtom(GLWin.dpy, "RESIZE", False))
					{
						GLWin.panel->GetSize((int *)&GLWin.width, (int *)&GLWin.height);
						GLWin.panel->GetPosition(&GLWin.x, &GLWin.y);
						XMoveResizeWindow(GLWin.dpy, GLWin.win, GLWin.x, GLWin.y, GLWin.width, GLWin.height);
					}
					if (GLWin.renderToMain &&
							(ulong) event.xclient.data.l[0] == XInternAtom(GLWin.dpy, "FOCUSIN", False))
					{
						GLWin.panel->SetFocus();
						if (g_Config.bHideCursor)
							XDefineCursor(GLWin.dpy, GLWin.win, GLWin.blankCursor);
					}
					if (GLWin.renderToMain && g_Config.bHideCursor &&
							(ulong) event.xclient.data.l[0] == XInternAtom(GLWin.dpy, "FOCUSOUT", False))
						XUndefineCursor(GLWin.dpy, GLWin.win);
#endif
					break;
				default:
					break;
			}
		}
		Common::SleepCurrentThread(20);
	}
	return 0;
}
#endif

// Create rendering window.
//		Call browser: Core.cpp:EmuThread() > main.cpp:Video_Initialize()
bool OpenGL_Create(SVideoInitialize &_VideoInitialize, int _iwidth, int _iheight)
{
#if !defined(HAVE_X11) || !HAVE_X11
	// Check for fullscreen mode
	int _twidth,  _theight;
	if (g_Config.bFullscreen)
	{
		if (strlen(g_Config.cFSResolution) > 1)
		{
			sscanf(g_Config.cFSResolution, "%dx%d", &_twidth, &_theight);
		}
		else // No full screen reso set, fall back to default reso
		{
			_twidth = _iwidth;
			_theight = _iheight;
		}
	}
	else // Going Windowed
	{
		if (strlen(g_Config.cInternalRes) > 1)
		{
			sscanf(g_Config.cInternalRes, "%dx%d", &_twidth, &_theight);
		}
		else // No Window resolution set, fall back to default
		{
			_twidth = _iwidth;
			_theight = _iheight;
		}
	}

	// Control window size and picture scaling
	s_backbuffer_width = _twidth;
	s_backbuffer_height = _theight;
#endif

	g_VideoInitialize.pPeekMessages = &Callback_PeekMessages;
	g_VideoInitialize.pUpdateFPSDisplay = &UpdateFPSDisplay;

#if defined(USE_WX) && USE_WX
	int args[] = {WX_GL_RGBA, WX_GL_DOUBLEBUFFER, WX_GL_DEPTH_SIZE, 16, 0};

	wxSize size(_iwidth, _iheight);
	if (!g_Config.RenderToMainframe ||
			g_VideoInitialize.pWindowHandle == NULL) {
		GLWin.frame = new wxFrame((wxWindow *)NULL,
				-1, _("Dolphin"), wxPoint(50,50), size);
	} else {
		GLWin.frame = new wxFrame((wxWindow *)g_VideoInitialize.pWindowHandle,
				-1, _("Dolphin"), wxPoint(50,50), size);
	}

	GLWin.glCanvas = new wxGLCanvas(GLWin.frame, wxID_ANY, args,
			wxPoint(0,0), size, wxSUNKEN_BORDER);
	GLWin.glCtxt = new wxGLContext(GLWin.glCanvas);
	GLWin.frame->Show(TRUE);
	GLWin.glCanvas->Show(TRUE);

	GLWin.glCanvas->SetCurrent(*GLWin.glCtxt);

#elif defined(HAVE_COCOA) && HAVE_COCOA
	GLWin.width = s_backbuffer_width;
	GLWin.height = s_backbuffer_height;
	GLWin.cocoaWin = cocoaGLCreateWindow(GLWin.width, GLWin.height);
	GLWin.cocoaCtx = cocoaGLInit(g_Config.iMultisampleMode);

#elif defined(_WIN32)
	g_VideoInitialize.pWindowHandle = (void*)EmuWindow::Create((HWND)g_VideoInitialize.pWindowHandle, g_hInstance, _T("Please wait..."));
	if (g_VideoInitialize.pWindowHandle == NULL)
	{
		g_VideoInitialize.pSysMessage("failed to create window");
		return false;
	}

	if (g_Config.bFullscreen)
	{
		DEVMODE dmScreenSettings;
		memset(&dmScreenSettings,0,sizeof(dmScreenSettings));
		dmScreenSettings.dmSize			= sizeof(dmScreenSettings);
		dmScreenSettings.dmPelsWidth    = s_backbuffer_width;
		dmScreenSettings.dmPelsHeight   = s_backbuffer_height;
		dmScreenSettings.dmBitsPerPel   = 32;
		dmScreenSettings.dmFields = DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT;

		// Try To Set Selected Mode And Get Results.  NOTE: CDS_FULLSCREEN Gets Rid Of Start Bar.
		if (ChangeDisplaySettings(&dmScreenSettings, CDS_FULLSCREEN) != DISP_CHANGE_SUCCESSFUL)
		{
			if (MessageBox(NULL, _T("The Requested Fullscreen Mode Is Not Supported By\nYour Video Card. Use Windowed Mode Instead?"), _T("NeHe GL"),MB_YESNO|MB_ICONEXCLAMATION)==IDYES)
				EmuWindow::ToggleFullscreen(EmuWindow::GetWnd());
			else
				return false;
		}
		else
		{
			// SetWindowPos to the upper-left corner of the screen
			SetWindowPos(EmuWindow::GetWnd(), HWND_TOP, 0, 0, _twidth, _theight, SWP_NOREPOSITION | SWP_NOZORDER);
		}
	}
	else
	{
		// Change to default resolution
		ChangeDisplaySettings(NULL, 0);
	}

	// Show the window
	EmuWindow::Show();

	PIXELFORMATDESCRIPTOR pfd =              // pfd Tells Windows How We Want Things To Be
	{
		sizeof(PIXELFORMATDESCRIPTOR),              // Size Of This Pixel Format Descriptor
		1,                                          // Version Number
		PFD_DRAW_TO_WINDOW |                        // Format Must Support Window
			PFD_SUPPORT_OPENGL |                        // Format Must Support OpenGL
			PFD_DOUBLEBUFFER,                           // Must Support Double Buffering
		PFD_TYPE_RGBA,                              // Request An RGBA Format
		32,                                         // Select Our Color Depth
		0, 0, 0, 0, 0, 0,                           // Color Bits Ignored
		0,                                          // 8bit Alpha Buffer
		0,                                          // Shift Bit Ignored
		0,                                          // No Accumulation Buffer
		0, 0, 0, 0,                                 // Accumulation Bits Ignored
		24,                                         // 24Bit Z-Buffer (Depth Buffer)  
		8,                                          // 8bit Stencil Buffer
		0,                                          // No Auxiliary Buffer
		PFD_MAIN_PLANE,                             // Main Drawing Layer
		0,                                          // Reserved
		0, 0, 0                                     // Layer Masks Ignored
	};

	GLuint      PixelFormat;            // Holds The Results After Searching For A Match

	if (!(hDC=GetDC(EmuWindow::GetWnd()))) {
		PanicAlert("(1) Can't create an OpenGL Device context. Fail.");
		return false;
	}
	if (!(PixelFormat = ChoosePixelFormat(hDC,&pfd))) {
		PanicAlert("(2) Can't find a suitable PixelFormat.");
		return false;
	}
	if (!SetPixelFormat(hDC, PixelFormat, &pfd)) {
		PanicAlert("(3) Can't set the PixelFormat.");
		return false;
	}
	if (!(hRC = wglCreateContext(hDC))) {
		PanicAlert("(4) Can't create an OpenGL rendering context.");
		return false;
	}
	// --------------------------------------

#elif defined(HAVE_X11) && HAVE_X11
	int glxMajorVersion, glxMinorVersion;
	int vidModeMajorVersion, vidModeMinorVersion;

	// attributes for a single buffered visual in RGBA format with at least
	// 8 bits per color and a 24 bit depth buffer
	int attrListSgl[] = {GLX_RGBA, GLX_RED_SIZE, 8,
		GLX_GREEN_SIZE, 8,
		GLX_BLUE_SIZE, 8,
		GLX_DEPTH_SIZE, 24,
		None};

	// attributes for a double buffered visual in RGBA format with at least
	// 8 bits per color and a 24 bit depth buffer
	int attrListDbl[] = {GLX_RGBA, GLX_DOUBLEBUFFER,
		GLX_RED_SIZE, 8,
		GLX_GREEN_SIZE, 8,
		GLX_BLUE_SIZE, 8,
		GLX_DEPTH_SIZE, 24,
		GLX_SAMPLE_BUFFERS_ARB, g_Config.iMultisampleMode, GLX_SAMPLES_ARB, 1, None };


	GLWin.dpy = XOpenDisplay(0);
#if defined(HAVE_GTK2) && HAVE_GTK2 && defined(wxGTK)
	GLWin.panel = (wxPanel *)g_VideoInitialize.pPanel;
#endif
	g_VideoInitialize.pWindowHandle = (Display *)GLWin.dpy;
	GLWin.screen = DefaultScreen(GLWin.dpy);

	// Fullscreen option.
	GLWin.fs = g_Config.bFullscreen; //Set to setting in Options
	// Render to main option.
#if defined(HAVE_GTK2) && HAVE_GTK2 && defined(wxGTK)
	GLWin.renderToMain = g_Config.RenderToMainframe;
#else
	GLWin.renderToMain = False;
#endif

	/* get an appropriate visual */
	GLWin.vi = glXChooseVisual(GLWin.dpy, GLWin.screen, attrListDbl);
	if (GLWin.vi == NULL) {
		GLWin.vi = glXChooseVisual(GLWin.dpy, GLWin.screen, attrListSgl);
		GLWin.doubleBuffered = False;
		ERROR_LOG(VIDEO, "Only Singlebuffered Visual!");
	}
	else {
		GLWin.doubleBuffered = True;
		NOTICE_LOG(VIDEO, "Got Doublebuffered Visual!");
	}

	glXQueryVersion(GLWin.dpy, &glxMajorVersion, &glxMinorVersion);
	NOTICE_LOG(VIDEO, "glX-Version %d.%d", glxMajorVersion, glxMinorVersion);
	// Create a GLX context.
	GLWin.ctx = glXCreateContext(GLWin.dpy, GLWin.vi, 0, GL_TRUE);
	if(!GLWin.ctx)
	{
		PanicAlert("Couldn't Create GLX context.Quit");
		exit(0); // TODO: Don't bring down entire Emu
	}
	// Create a color map and set the event masks
	GLWin.attr.colormap = XCreateColormap(GLWin.dpy,
			RootWindow(GLWin.dpy, GLWin.vi->screen), GLWin.vi->visual, AllocNone);
	GLWin.attr.event_mask = ExposureMask | KeyPressMask | KeyReleaseMask |
		StructureNotifyMask | ResizeRedirectMask;
	GLWin.attr.background_pixel = BlackPixel(GLWin.dpy, GLWin.screen);
	GLWin.attr.border_pixel = 0;
	XkbSetDetectableAutoRepeat(GLWin.dpy, True, NULL);

	// Get the resolution setings for both fullscreen and windowed modes
	if (strlen(g_Config.cFSResolution) > 1)
		sscanf(g_Config.cFSResolution, "%dx%d", &GLWin.fullWidth, &GLWin.fullHeight);
	else // No full screen reso set, fall back to desktop resolution
	{
		GLWin.fullWidth = DisplayWidth(GLWin.dpy, GLWin.screen);
		GLWin.fullHeight = DisplayHeight(GLWin.dpy, GLWin.screen);
	}
	if (strlen(g_Config.cInternalRes) > 1)
		sscanf(g_Config.cInternalRes, "%dx%d", &GLWin.winWidth, &GLWin.winHeight);
	else // No Window resolution set, fall back to default
	{
		GLWin.winWidth = _iwidth;
		GLWin.winHeight = _iheight;
	}

#if defined(HAVE_XRANDR) && HAVE_XRANDR
	XRRQueryVersion(GLWin.dpy, &vidModeMajorVersion, &vidModeMinorVersion);
	XRRScreenSize *sizes;
	int numSizes;

	NOTICE_LOG(VIDEO, "XRRExtension-Version %d.%d", vidModeMajorVersion, vidModeMinorVersion);

	GLWin.screenConfig = XRRGetScreenInfo(GLWin.dpy, RootWindow(GLWin.dpy, GLWin.screen));

	/* save desktop resolution */
	GLWin.deskSize = XRRConfigCurrentConfiguration(GLWin.screenConfig, &GLWin.screenRotation);
	/* Set the desktop resolution as the default */
	GLWin.fullSize = -1;

	/* Find the index of the fullscreen resolution from config */
	sizes = XRRConfigSizes(GLWin.screenConfig, &numSizes);
	if (numSizes > 0 && sizes != NULL) {
		for (int i = 0; i < numSizes; i++) {
			if ((sizes[i].width == GLWin.fullWidth) && (sizes[i].height == GLWin.fullHeight)) {
				GLWin.fullSize = i;
			}
		}
		NOTICE_LOG(VIDEO, "Fullscreen Resolution %dx%d", sizes[GLWin.fullSize].width, sizes[GLWin.fullSize].height);
	}
	else {
		ERROR_LOG(VIDEO, "Failed to obtain fullscreen sizes.\n"
				"Using current desktop resolution for fullscreen.\n");
		GLWin.fullWidth = DisplayWidth(GLWin.dpy, GLWin.screen);
		GLWin.fullHeight = DisplayHeight(GLWin.dpy, GLWin.screen);
	}
#else
	GLWin.fullWidth = DisplayWidth(GLWin.dpy, GLWin.screen);
	GLWin.fullHeight = DisplayHeight(GLWin.dpy, GLWin.screen);
#endif

#if defined(HAVE_GTK2) && HAVE_GTK2 && defined(wxGTK)
	if (GLWin.renderToMain)
		g_VideoInitialize.pKeyPress(0, False, False);
#endif

	CreateXWindow();
	g_VideoInitialize.pXWindow = (Window *) &GLWin.win;

#endif
	return true;
}

bool OpenGL_MakeCurrent()
{
#if defined(USE_WX) && USE_WX
	GLWin.glCanvas->SetCurrent(*GLWin.glCtxt);
#elif defined(HAVE_COCOA) && HAVE_COCOA
	cocoaGLMakeCurrent(GLWin.cocoaCtx,GLWin.cocoaWin);
#elif defined(_WIN32)
	if (!wglMakeCurrent(hDC,hRC)) {
		PanicAlert("(5) Can't Activate The GL Rendering Context.");
		return false;
	}
#elif defined(HAVE_X11) && HAVE_X11
	Window winDummy;
	unsigned int borderDummy;
	// connect the glx-context to the window
	glXMakeCurrent(GLWin.dpy, GLWin.win, GLWin.ctx);
	XGetGeometry(GLWin.dpy, GLWin.win, &winDummy, &GLWin.x, &GLWin.y,
			&GLWin.width, &GLWin.height, &borderDummy, &GLWin.depth);
	NOTICE_LOG(VIDEO, "GLWin Depth %d", GLWin.depth)
		if (glXIsDirect(GLWin.dpy, GLWin.ctx)) {
			NOTICE_LOG(VIDEO, "detected direct rendering");
		} else {
			ERROR_LOG(VIDEO, "no Direct Rendering possible!");
		}

	if (GLWin.fs)
	{
#if defined(HAVE_GTK2) && HAVE_GTK2 && defined(wxGTK)
		if (GLWin.renderToMain)
		{
			GLWin.fs = False;
			g_VideoInitialize.pKeyPress(0x1d, False, False);
		}
		else
#endif
			X11_EWMH_Fullscreen(_NET_WM_STATE_ADD);
	}

	// Hide the cursor now
	if (g_Config.bHideCursor)
		XDefineCursor (GLWin.dpy, GLWin.win, GLWin.blankCursor);

	// better for pad plugin key input (thc)
	XSelectInput(GLWin.dpy, GLWin.win, ExposureMask | KeyPressMask | KeyReleaseMask |
			StructureNotifyMask | EnterWindowMask | LeaveWindowMask | FocusChangeMask );
#endif
	return true;
}


// Update window width, size and etc. Called from Render.cpp
void OpenGL_Update()
{
#if defined(USE_WX) && USE_WX
	RECT rcWindow = {0};
	rcWindow.right = GLWin.width;
	rcWindow.bottom = GLWin.height;

	// TODO fill in

#elif defined(HAVE_COCOA) && HAVE_COCOA
	RECT rcWindow = {0};
	rcWindow.right = GLWin.width;
	rcWindow.bottom = GLWin.height;

#elif defined(_WIN32)
	RECT rcWindow;
	if (!EmuWindow::GetParentWnd())
	{
		// We are not rendering to a child window - use client size.
		GetClientRect(EmuWindow::GetWnd(), &rcWindow);
	}
	else
	{
		// We are rendering to a child window - use parent size.
		GetWindowRect(EmuWindow::GetParentWnd(), &rcWindow);
	}

	// ---------------------------------------------------------------------------------------
	// Get the new window width and height
	// ------------------
	// See below for documentation
	// ------------------
	int width = rcWindow.right - rcWindow.left;
	int height = rcWindow.bottom - rcWindow.top;

	// If we are rendering to a child window
	if (EmuWindow::GetParentWnd() != 0)
		::MoveWindow(EmuWindow::GetWnd(), 0, 0, width, height, FALSE);

	s_backbuffer_width = width;
	s_backbuffer_height = height;

#elif defined(HAVE_X11) && HAVE_X11
#endif
}


// Close plugin
void OpenGL_Shutdown()
{
#if defined(USE_WX) && USE_WX
	delete GLWin.glCanvas;
	delete GLWin.frame;
#elif defined(HAVE_COCOA) && HAVE_COCOA
	cocoaGLDeleteWindow(GLWin.cocoaWin);
	cocoaGLDelete(GLWin.cocoaCtx);

#elif defined(_WIN32)
	if (hRC)                                            // Do We Have A Rendering Context?
	{
		if (!wglMakeCurrent(NULL,NULL))                 // Are We Able To Release The DC And RC Contexts?
		{
			// [F|RES]: if this fails i dont see the message box and
			// cant get out of the modal state so i disable it.
			// This function fails only if i render to main window
			// MessageBox(NULL,"Release Of DC And RC Failed.", "SHUTDOWN ERROR", MB_OK | MB_ICONINFORMATION);
		}

		if (!wglDeleteContext(hRC))                     // Are We Able To Delete The RC?
		{
			ERROR_LOG(VIDEO, "Release Rendering Context Failed.");
		}
		hRC = NULL;                                       // Set RC To NULL
	}

	if (hDC && !ReleaseDC(EmuWindow::GetWnd(), hDC))      // Are We Able To Release The DC
	{
		ERROR_LOG(VIDEO, "Release Device Context Failed.");
		hDC = NULL;                                       // Set DC To NULL
	}
#elif defined(HAVE_X11) && HAVE_X11
	DestroyXWindow();
	if (GLWin.xEventThread)
		GLWin.xEventThread->WaitForDeath();
	GLWin.xEventThread = NULL;
#if defined(HAVE_XRANDR) && HAVE_XRANDR
	if (GLWin.fullSize >= 0)
		XRRFreeScreenConfigInfo(GLWin.screenConfig);
#endif
	if (g_Config.bHideCursor)
		XFreeCursor(GLWin.dpy, GLWin.blankCursor);
	if (GLWin.ctx)
	{
		glXDestroyContext(GLWin.dpy, GLWin.ctx);
		XFreeColormap(GLWin.dpy, GLWin.attr.colormap);
		XCloseDisplay(GLWin.dpy);
		GLWin.ctx = NULL;
	}
#endif
}

GLuint OpenGL_ReportGLError(const char *function, const char *file, int line)
{
	GLint err = glGetError();
	if (err != GL_NO_ERROR)
	{
		ERROR_LOG(VIDEO, "%s:%d: (%s) OpenGL error 0x%x - %s\n", file, line, function, err, gluErrorString(err));
	}
	return err;
}

void OpenGL_ReportARBProgramError()
{
	const GLubyte* pstr = glGetString(GL_PROGRAM_ERROR_STRING_ARB);
	if (pstr != NULL && pstr[0] != 0)
	{
		GLint loc = 0;
		glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &loc);
		ERROR_LOG(VIDEO, "program error at %d: ", loc);
		ERROR_LOG(VIDEO, (char*)pstr);
		ERROR_LOG(VIDEO, "");
	}
}

bool OpenGL_ReportFBOError(const char *function, const char *file, int line)
{
	unsigned int fbo_status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
	if (fbo_status != GL_FRAMEBUFFER_COMPLETE_EXT)
	{
		const char *error = "-";
		switch (fbo_status)
		{
			case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT:          error = "INCOMPLETE_ATTACHMENT_EXT"; break;
			case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT:  error = "INCOMPLETE_MISSING_ATTACHMENT_EXT"; break;
			case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT:          error = "INCOMPLETE_DIMENSIONS_EXT"; break;
			case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT:             error = "INCOMPLETE_FORMATS_EXT"; break;
			case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT:         error = "INCOMPLETE_DRAW_BUFFER_EXT"; break;
			case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT:         error = "INCOMPLETE_READ_BUFFER_EXT"; break;
			case GL_FRAMEBUFFER_UNSUPPORTED_EXT:                    error = "UNSUPPORTED_EXT"; break;
		}
		ERROR_LOG(VIDEO, "%s:%d: (%s) OpenGL FBO error - %s\n", file, line, function, error);
		return false;
	}
	return true;
}