/*

SDL - Simple DirectMedia Layer

Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Library General Public

License as published by the Free Software Foundation; either

version 2 of the License, or (at your option) any later version.

This library 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

Library General Public License for more details.

You should have received a copy of the GNU Library General Public

License along with this library; if not, write to the Free

Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

Sam Lantinga

slouken@libsdl.org

*/

#ifdef SAVE_RCSID

static char rcsid =

"@(#) $Id$";

#endif

/* X11 based SDL video driver implementation.

Note: This implementation does not currently need X11 thread locking,

since the event thread uses a separate X connection and any

additional locking necessary is handled internally. However,

if full locking is neccessary, take a look at XInitThreads().

*/

#include <stdlib.h>

#include <stdio.h>

#include <unistd.h>

#include <string.h>

#include <sys/ioctl.h>

#ifdef MTRR_SUPPORT

#include <asm/mtrr.h>

#include <sys/fcntl.h>

#endif

#ifdef HAVE_ALLOCA_H

#include <alloca.h>

#endif

#ifdef HAVE_ALLOCA

#define ALLOCA(n) ((void*)alloca(n))

#define FREEA(p)

#else

#define ALLOCA(n) malloc(n)

#define FREEA(p) free(p)

#endif

#include "SDL.h"

#include "SDL_error.h"

#include "SDL_timer.h"

#include "SDL_thread.h"

#include "SDL_video.h"

#include "SDL_mouse.h"

#include "SDL_endian.h"

#include "SDL_sysvideo.h"

#include "SDL_pixels_c.h"

#include "SDL_events_c.h"

#include "SDL_x11video.h"

#include "SDL_x11wm_c.h"

#include "SDL_x11mouse_c.h"

#include "SDL_x11events_c.h"

#include "SDL_x11modes_c.h"

#include "SDL_x11image_c.h"

#include "SDL_x11yuv_c.h"

#include "SDL_x11gl_c.h"

#include "SDL_x11gamma_c.h"

#include "blank_cursor.h"

/* Initialization/Query functions */

static int X11_VideoInit(_THIS, SDL_PixelFormat *vformat);

static SDL_Surface *X11_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);

static int X11_ToggleFullScreen(_THIS, int on);

static void X11_UpdateMouse(_THIS);

static int X11_SetColors(_THIS, int firstcolor, int ncolors,

SDL_Color *colors);

static int X11_SetGammaRamp(_THIS, Uint16 *ramp);

static void X11_VideoQuit(_THIS);

/* X11 driver bootstrap functions */

static int X11_Available(void)

{

Display *display;

display = XOpenDisplay(NULL);

if ( display != NULL ) {

XCloseDisplay(display);

}

return(display != NULL);

}

static void X11_DeleteDevice(SDL_VideoDevice *device)

{

if ( device ) {

if ( device->hidden ) {

free(device->hidden);

}

if ( device->gl_data ) {

free(device->gl_data);

}

free(device);

}

}

static SDL_VideoDevice *X11_CreateDevice(int devindex)

{

SDL_VideoDevice *device;

/* Initialize all variables that we clean on shutdown */

device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));

if ( device ) {

memset(device, 0, (sizeof *device));

device->hidden = (struct SDL_PrivateVideoData *)

malloc((sizeof *device->hidden));

device->gl_data = (struct SDL_PrivateGLData *)

malloc((sizeof *device->gl_data));

}

if ( (device == NULL) || (device->hidden == NULL) ||

(device->gl_data == NULL) ) {

SDL_OutOfMemory();

X11_DeleteDevice(device);

return(0);

}

memset(device->hidden, 0, (sizeof *device->hidden));

memset(device->gl_data, 0, (sizeof *device->gl_data));

/* Set the driver flags */

device->handles_any_size = 1;

/* Set the function pointers */

device->VideoInit = X11_VideoInit;

device->ListModes = X11_ListModes;

device->SetVideoMode = X11_SetVideoMode;

device->ToggleFullScreen = X11_ToggleFullScreen;

device->UpdateMouse = X11_UpdateMouse;

#ifdef XFREE86_XV

device->CreateYUVOverlay = X11_CreateYUVOverlay;

#endif

device->SetColors = X11_SetColors;

device->UpdateRects = NULL;

device->VideoQuit = X11_VideoQuit;

device->AllocHWSurface = X11_AllocHWSurface;

device->CheckHWBlit = NULL;

device->FillHWRect = NULL;

device->SetHWColorKey = NULL;

device->SetHWAlpha = NULL;

device->LockHWSurface = X11_LockHWSurface;

device->UnlockHWSurface = X11_UnlockHWSurface;

device->FlipHWSurface = X11_FlipHWSurface;

device->FreeHWSurface = X11_FreeHWSurface;

device->SetGamma = X11_SetVidModeGamma;

device->GetGamma = X11_GetVidModeGamma;

device->SetGammaRamp = X11_SetGammaRamp;

device->GetGammaRamp = NULL;

#ifdef HAVE_OPENGL

device->GL_LoadLibrary = X11_GL_LoadLibrary;

device->GL_GetProcAddress = X11_GL_GetProcAddress;

device->GL_GetAttribute = X11_GL_GetAttribute;

device->GL_MakeCurrent = X11_GL_MakeCurrent;

device->GL_SwapBuffers = X11_GL_SwapBuffers;

#endif

device->SetCaption = X11_SetCaption;

device->SetIcon = X11_SetIcon;

device->IconifyWindow = X11_IconifyWindow;

device->GrabInput = X11_GrabInput;

device->GetWMInfo = X11_GetWMInfo;

device->FreeWMCursor = X11_FreeWMCursor;

device->CreateWMCursor = X11_CreateWMCursor;

device->ShowWMCursor = X11_ShowWMCursor;

device->WarpWMCursor = X11_WarpWMCursor;

device->CheckMouseMode = X11_CheckMouseMode;

device->InitOSKeymap = X11_InitOSKeymap;

device->PumpEvents = X11_PumpEvents;

device->free = X11_DeleteDevice;

return device;

}

VideoBootStrap X11_bootstrap = {

"x11", "X Window System",

X11_Available, X11_CreateDevice

};

/* Shared memory information */

extern int XShmQueryExtension(Display *dpy); /* Not in X11 headers */

/* Normal X11 error handler routine */

static int (*X_handler)(Display *, XErrorEvent *) = NULL;

static int x_errhandler(Display *d, XErrorEvent *e)

{

#ifdef XFREE86_VM

extern int vm_error;

#endif

#ifdef XFREE86_DGAMOUSE

extern int dga_error;

#endif

#ifdef XFREE86_VM

/* VidMode errors are non-fatal. :) */

/* Are the errors offset by one from the error base?

e.g. the error base is 143, the code is 148, and the

actual error is XF86VidModeExtensionDisabled (4) ?

*/

if ( (vm_error >= 0) &&

(((e->error_code == BadRequest)&&(e->request_code == vm_error)) ||

((e->error_code > vm_error) &&

(e->error_code <= (vm_error+XF86VidModeNumberErrors)))) ) {

#ifdef XFREE86_DEBUG

{ char errmsg[1024];

XGetErrorText(d, e->error_code, errmsg, sizeof(errmsg));

printf("VidMode error: %s\n", errmsg);

}

#endif

return(0);

}

#endif /* XFREE86_VM */

#ifdef XFREE86_DGAMOUSE

/* DGA errors can be non-fatal. :) */

if ( (dga_error >= 0) &&

((e->error_code > dga_error) &&

(e->error_code <= (dga_error+XF86DGANumberErrors))) ) {

#ifdef XFREE86_DEBUG

{ char errmsg[1024];

XGetErrorText(d, e->error_code, errmsg, sizeof(errmsg));

printf("DGA error: %s\n", errmsg);

}

#endif

return(0);

}

#endif /* XFREE86_DGAMOUSE */

return(X_handler(d,e));

}

/* X11 I/O error handler routine */

static int (*XIO_handler)(Display *) = NULL;

static int xio_errhandler(Display *d)

{

/* Ack! Lost X11 connection! */

/* We will crash if we try to clean up our display */

if ( current_video->hidden->Ximage ) {

SDL_VideoSurface->pixels = NULL;

}

current_video->hidden->X11_Display = NULL;

/* Continue with the standard X11 error handler */

return(XIO_handler(d));

}

/* Create auxiliary (toplevel) windows with the current visual */

static void create_aux_windows(_THIS)

{

XSetWindowAttributes xattr;

XWMHints *hints;

XTextProperty titleprop, iconprop;

int def_vis = (SDL_Visual == DefaultVisual(SDL_Display, SDL_Screen));

/* Don't create any extra windows if we are being managed */

if ( SDL_windowid ) {

FSwindow = 0;

WMwindow = strtol(SDL_windowid, NULL, 0);

return;

}

if(FSwindow)

XDestroyWindow(SDL_Display, FSwindow);

xattr.override_redirect = True;

xattr.background_pixel = def_vis ? BlackPixel(SDL_Display, SDL_Screen) : 0;

xattr.border_pixel = 0;

xattr.colormap = SDL_XColorMap;

FSwindow = XCreateWindow(SDL_Display, SDL_Root, 0, 0, 32, 32, 0,

this->hidden->depth, InputOutput, SDL_Visual,

CWOverrideRedirect | CWBackPixel | CWBorderPixel

| CWColormap,

&xattr);

XSelectInput(SDL_Display, FSwindow, StructureNotifyMask);

/* Tell KDE to keep the fullscreen window on top */

{

XEvent ev;

long mask;

memset(&ev, 0, sizeof(ev));

ev.xclient.type = ClientMessage;

ev.xclient.window = SDL_Root;

ev.xclient.message_type = XInternAtom(SDL_Display,

"KWM_KEEP_ON_TOP", False);

ev.xclient.format = 32;

ev.xclient.data.l[0] = FSwindow;

ev.xclient.data.l[1] = CurrentTime;

mask = SubstructureRedirectMask;

XSendEvent(SDL_Display, SDL_Root, False, mask, &ev);

}

hints = NULL;

titleprop.value = iconprop.value = NULL;

if(WMwindow) {

/* All window attributes must survive the recreation */

hints = XGetWMHints(SDL_Display, WMwindow);

XGetWMName(SDL_Display, WMwindow, &titleprop);

XGetWMIconName(SDL_Display, WMwindow, &iconprop);

XDestroyWindow(SDL_Display, WMwindow);

}

/* Create the window for windowed management */

/* (reusing the xattr structure above) */

WMwindow = XCreateWindow(SDL_Display, SDL_Root, 0, 0, 32, 32, 0,

this->hidden->depth, InputOutput, SDL_Visual,

CWBackPixel | CWBorderPixel | CWColormap,

&xattr);

/* Set the input hints so we get keyboard input */

if(!hints) {

hints = XAllocWMHints();

hints->input = True;

hints->flags = InputHint;

}

XSetWMHints(SDL_Display, WMwindow, hints);

XFree(hints);

if(titleprop.value) {

XSetWMName(SDL_Display, WMwindow, &titleprop);

XFree(titleprop.value);

}

if(iconprop.value) {

XSetWMIconName(SDL_Display, WMwindow, &iconprop);

XFree(iconprop.value);

}

XSelectInput(SDL_Display, WMwindow,

FocusChangeMask | KeyPressMask | KeyReleaseMask

| PropertyChangeMask | StructureNotifyMask | KeymapStateMask);

/* Set the class hints so we can get an icon (AfterStep) */

{

XClassHint *classhints;

classhints = XAllocClassHint();

if(classhints != NULL) {

classhints->res_name = "SDL_App";

classhints->res_class = "SDL_App";

XSetClassHint(SDL_Display, WMwindow, classhints);

XFree(classhints);

}

}

/* Allow the window to be deleted by the window manager */

WM_DELETE_WINDOW = XInternAtom(SDL_Display, "WM_DELETE_WINDOW", False);

XSetWMProtocols(SDL_Display, WMwindow, &WM_DELETE_WINDOW, 1);

}

static int X11_VideoInit(_THIS, SDL_PixelFormat *vformat)

{

char *display;

int i;

/* Open the X11 display */

display = NULL; /* Get it from DISPLAY environment variable */

if ( (strncmp(XDisplayName(display), ":", 1) == 0) ||

(strncmp(XDisplayName(display), "unix:", 5) == 0) ) {

local_X11 = 1;

} else {

local_X11 = 0;

}

SDL_Display = XOpenDisplay(display);

if ( SDL_Display == NULL ) {

SDL_SetError("Couldn't open X11 display");

return(-1);

}

#ifdef X11_DEBUG

XSynchronize(SDL_Display, True);

#endif

/* Create an alternate X display for graphics updates -- allows us

to do graphics updates in a separate thread from event handling.

Thread-safe X11 doesn't seem to exist.

*/

GFX_Display = XOpenDisplay(display);

if ( GFX_Display == NULL ) {

SDL_SetError("Couldn't open X11 display");

return(-1);

}

/* Set the normal X error handler */

X_handler = XSetErrorHandler(x_errhandler);

/* Set the error handler if we lose the X display */

XIO_handler = XSetIOErrorHandler(xio_errhandler);

/* use default screen (from $DISPLAY) */

SDL_Screen = DefaultScreen(SDL_Display);

use_mitshm = 0;

#ifndef NO_SHARED_MEMORY

/* Check for MIT shared memory extension */

if ( local_X11 ) {

use_mitshm = XShmQueryExtension(SDL_Display);

}

#endif /* NO_SHARED_MEMORY */

/* Get the available video modes */

if(X11_GetVideoModes(this) < 0)

return -1;

/* Determine the default screen depth:

Use the default visual (or at least one with the same depth) */

SDL_DisplayColormap = DefaultColormap(SDL_Display, SDL_Screen);

for(i = 0; i < this->hidden->nvisuals; i++)

if(this->hidden->visuals[i].depth == DefaultDepth(SDL_Display,

SDL_Screen))

break;

if(i == this->hidden->nvisuals) {

/* default visual was useless, take the deepest one instead */

i = 0;

}

SDL_Visual = this->hidden->visuals[i].visual;

if ( SDL_Visual == DefaultVisual(SDL_Display, SDL_Screen) ) {

SDL_XColorMap = SDL_DisplayColormap;

} else {

SDL_XColorMap = XCreateColormap(SDL_Display, SDL_Root,

SDL_Visual, AllocNone);

}

this->hidden->depth = this->hidden->visuals[i].depth;

vformat->BitsPerPixel = this->hidden->visuals[i].bpp;

if ( vformat->BitsPerPixel > 8 ) {

vformat->Rmask = SDL_Visual->red_mask;

vformat->Gmask = SDL_Visual->green_mask;

vformat->Bmask = SDL_Visual->blue_mask;

}

X11_SaveVidModeGamma(this);

/* See if we have been passed a window to use */

SDL_windowid = getenv("SDL_WINDOWID");

/* Create the fullscreen and managed windows */

create_aux_windows(this);

/* Create the blank cursor */

SDL_BlankCursor = this->CreateWMCursor(this, blank_cdata, blank_cmask,

BLANK_CWIDTH, BLANK_CHEIGHT,

BLANK_CHOTX, BLANK_CHOTY);

/* Fill in some window manager capabilities */

this->info.wm_available = 1;

/* We're done! */

XFlush(SDL_Display);

return(0);

}

static void X11_DestroyWindow(_THIS, SDL_Surface *screen)

{

/* Clean up OpenGL */

if ( screen ) {

screen->flags &= ~(SDL_OPENGL|SDL_OPENGLBLIT);

}

X11_GL_Shutdown(this);

if ( ! SDL_windowid ) {

/* Hide the managed window */

if ( WMwindow ) {

XUnmapWindow(SDL_Display, WMwindow);

}

if ( screen && (screen->flags & SDL_FULLSCREEN) ) {

screen->flags &= ~SDL_FULLSCREEN;

X11_LeaveFullScreen(this);

}

/* Destroy the output window */

if ( SDL_Window ) {

XDestroyWindow(SDL_Display, SDL_Window);

}

/* Free the colormap entries */

if ( SDL_XPixels ) {

int numcolors;

unsigned long pixel;

numcolors = SDL_Visual->map_entries;

for ( pixel=0; pixel<numcolors; ++pixel ) {

while ( SDL_XPixels[pixel] > 0 ) {

XFreeColors(GFX_Display,

SDL_DisplayColormap,&pixel,1,0);

--SDL_XPixels[pixel];

}

}

free(SDL_XPixels);

SDL_XPixels = NULL;

}

/* Free the graphics context */

if ( SDL_GC ) {

XFreeGC(SDL_Display, SDL_GC);

SDL_GC = 0;

}

}

}

static void X11_SetSizeHints(_THIS, int w, int h, Uint32 flags)

{

XSizeHints *hints;

hints = XAllocSizeHints();

if ( hints ) {

if ( flags & SDL_RESIZABLE ) {

hints->min_width = 32;

hints->min_height = 32;

hints->max_height = 4096;

hints->max_width = 4096;

} else {

hints->min_width = hints->max_width = w;

hints->min_height = hints->max_height = h;

}

hints->flags = PMaxSize | PMinSize;

if ( flags & SDL_FULLSCREEN ) {

hints->x = 0;

hints->y = 0;

hints->flags |= USPosition;

} else

/* Center it, if desired */

if ( getenv("SDL_VIDEO_CENTERED") ) {

int display_w, display_h;

display_w = DisplayWidth(SDL_Display, SDL_Screen);

display_h = DisplayHeight(SDL_Display, SDL_Screen);

hints->x = (display_w - w)/2;

hints->y = (display_h - h)/2;

hints->flags |= USPosition;

XMoveWindow(SDL_Display, WMwindow, hints->x, hints->y);

/* Flush the resize event so we don't catch it later */

XSync(SDL_Display, True);

}

XSetWMNormalHints(SDL_Display, WMwindow, hints);

XFree(hints);

}

/* Respect the window caption style */

if ( flags & SDL_NOFRAME ) {

SDL_bool set;

Atom WM_HINTS;

/* We haven't modified the window manager hints yet */

set = SDL_FALSE;

/* First try to set MWM hints */

WM_HINTS = XInternAtom(SDL_Display, "_MOTIF_WM_HINTS", True);

if ( WM_HINTS != None ) {

/* Hints used by Motif compliant window managers */

struct {

unsigned long flags;

unsigned long functions;

unsigned long decorations;

long input_mode;

unsigned long status;

} MWMHints = { (1L << 1), 0, 0, 0, 0 };

XChangeProperty(SDL_Display, WMwindow,

WM_HINTS, WM_HINTS, 32,

PropModeReplace,

(unsigned char *)&MWMHints,

sizeof(MWMHints)/sizeof(long));

set = SDL_TRUE;

}

/* Now try to set KWM hints */

WM_HINTS = XInternAtom(SDL_Display, "KWM_WIN_DECORATION", True);

if ( WM_HINTS != None ) {

long KWMHints = 0;

XChangeProperty(SDL_Display, WMwindow,

WM_HINTS, WM_HINTS, 32,

PropModeReplace,

(unsigned char *)&KWMHints,

sizeof(KWMHints)/sizeof(long));

set = SDL_TRUE;

}

/* Now try to set GNOME hints */

WM_HINTS = XInternAtom(SDL_Display, "_WIN_HINTS", True);

if ( WM_HINTS != None ) {

long GNOMEHints = 0;

XChangeProperty(SDL_Display, WMwindow,

WM_HINTS, WM_HINTS, 32,

PropModeReplace,

(unsigned char *)&GNOMEHints,

sizeof(GNOMEHints)/sizeof(long));

set = SDL_TRUE;

}

/* Finally set the transient hints if necessary */

if ( ! set ) {

XSetTransientForHint(SDL_Display, WMwindow, SDL_Root);

}

} else {

SDL_bool set;

Atom WM_HINTS;

/* We haven't modified the window manager hints yet */

set = SDL_FALSE;

/* First try to unset MWM hints */

WM_HINTS = XInternAtom(SDL_Display, "_MOTIF_WM_HINTS", True);

if ( WM_HINTS != None ) {

XDeleteProperty(SDL_Display, WMwindow, WM_HINTS);

set = SDL_TRUE;

}

/* Now try to unset KWM hints */

WM_HINTS = XInternAtom(SDL_Display, "KWM_WIN_DECORATION", True);

if ( WM_HINTS != None ) {

XDeleteProperty(SDL_Display, WMwindow, WM_HINTS);

set = SDL_TRUE;

}

/* Now try to unset GNOME hints */

WM_HINTS = XInternAtom(SDL_Display, "_WIN_HINTS", True);

if ( WM_HINTS != None ) {

XDeleteProperty(SDL_Display, WMwindow, WM_HINTS);

set = SDL_TRUE;

}

/* Finally unset the transient hints if necessary */

if ( ! set ) {

/* NOTE: Does this work? */

XSetTransientForHint(SDL_Display, WMwindow, None);

}

}

}

static int X11_CreateWindow(_THIS, SDL_Surface *screen,

int w, int h, int bpp, Uint32 flags)

{

int i, depth;

Visual *vis;

int vis_change;

/* If a window is already present, destroy it and start fresh */

if ( SDL_Window ) {

X11_DestroyWindow(this, screen);

}

/* See if we have been given a window id */

if ( SDL_windowid ) {

SDL_Window = strtol(SDL_windowid, NULL, 0);

} else {

SDL_Window = 0;

}

/* find out which visual we are going to use */

if ( flags & SDL_OPENGL ) {

XVisualInfo *vi;

vi = X11_GL_GetVisual(this);

if( !vi ) {

return -1;

}

vis = vi->visual;

depth = vi->depth;

} else if ( SDL_windowid ) {

XWindowAttributes a;

XGetWindowAttributes(SDL_Display, SDL_Window, &a);

vis = a.visual;

depth = a.depth;

} else {

for ( i = 0; i < this->hidden->nvisuals; i++ ) {

if ( this->hidden->visuals[i].bpp == bpp )

break;

}

if ( i == this->hidden->nvisuals ) {

SDL_SetError("No matching visual for requested depth");

return -1; /* should never happen */

}

vis = this->hidden->visuals[i].visual;

depth = this->hidden->visuals[i].depth;

}

#ifdef X11_DEBUG

printf("Choosing %s visual at %d bpp - %d colormap entries\n", vis->class == PseudoColor ? "PseudoColor" : (vis->class == TrueColor ? "TrueColor" : (vis->class == DirectColor ? "DirectColor" : "Unknown")), depth, vis->map_entries);

#endif

vis_change = (vis != SDL_Visual);

SDL_Visual = vis;

this->hidden->depth = depth;

/* Allocate the new pixel format for this video mode */

if ( ! SDL_ReallocFormat(screen, bpp,

vis->red_mask, vis->green_mask, vis->blue_mask, 0) )

return -1;

/* Create the appropriate colormap */

if ( SDL_XColorMap != SDL_DisplayColormap ) {

XFreeColormap(SDL_Display, SDL_XColorMap);

}

if ( SDL_Visual->class == PseudoColor ) {

int ncolors;

/* Allocate the pixel flags */

ncolors = SDL_Visual->map_entries;

SDL_XPixels = malloc(ncolors * sizeof(int));

if(SDL_XPixels == NULL) {

SDL_OutOfMemory();

return -1;

}

memset(SDL_XPixels, 0, ncolors * sizeof(*SDL_XPixels));

/* always allocate a private colormap on non-default visuals */

if ( SDL_Visual != DefaultVisual(SDL_Display, SDL_Screen) ) {

flags |= SDL_HWPALETTE;

}

if ( flags & SDL_HWPALETTE ) {

screen->flags |= SDL_HWPALETTE;

SDL_XColorMap = XCreateColormap(SDL_Display, SDL_Root,

SDL_Visual, AllocAll);

} else {

SDL_XColorMap = SDL_DisplayColormap;

}

} else if ( SDL_Visual->class == DirectColor ) {

/* Create a colormap which we can manipulate for gamma */

SDL_XColorMap = XCreateColormap(SDL_Display, SDL_Root,

SDL_Visual, AllocAll);

XSync(SDL_Display, False);

/* Initialize the colormap to the identity mapping */

SDL_GetGammaRamp(0, 0, 0);

this->screen = screen;

X11_SetGammaRamp(this, this->gamma);

this->screen = NULL;

} else {

/* Create a read-only colormap for our window */

SDL_XColorMap = XCreateColormap(SDL_Display, SDL_Root,

SDL_Visual, AllocNone);

}

/* Recreate the auxiliary windows, if needed (required for GL) */

if ( vis_change )

create_aux_windows(this);

if(screen->flags & SDL_HWPALETTE) {

/* Since the full-screen window might have got a nonzero background

colour (0 is white on some displays), we should reset the

background to 0 here since that is what the user expects

with a private colormap */

XSetWindowBackground(SDL_Display, FSwindow, 0);

XClearWindow(SDL_Display, FSwindow);

}

/* resize the (possibly new) window manager window */

if( !SDL_windowid ) {

X11_SetSizeHints(this, w, h, flags);

current_w = w;

current_h = h;

XResizeWindow(SDL_Display, WMwindow, w, h);

}

/* Create (or use) the X11 display window */

if ( !SDL_windowid ) {

if ( flags & SDL_OPENGL ) {

if ( X11_GL_CreateWindow(this, w, h) < 0 ) {

return(-1);

}

} else {

XSetWindowAttributes swa;

swa.background_pixel = 0;

swa.border_pixel = 0;

swa.colormap = SDL_XColorMap;

SDL_Window = XCreateWindow(SDL_Display, WMwindow,

0, 0, w, h, 0, depth,

InputOutput, SDL_Visual,

CWBackPixel | CWBorderPixel

| CWColormap, &swa);

}

/* Only manage our input if we own the window */

XSelectInput(SDL_Display, SDL_Window,

( EnterWindowMask | LeaveWindowMask

| ButtonPressMask | ButtonReleaseMask

| PointerMotionMask | ExposureMask ));

}

/* Create the graphics context here, once we have a window */

if ( flags & SDL_OPENGL ) {

if ( X11_GL_CreateContext(this) < 0 ) {

return(-1);

} else {

screen->flags |= SDL_OPENGL;

}

} else {

XGCValues gcv;

gcv.graphics_exposures = False;

SDL_GC = XCreateGC(SDL_Display, SDL_Window,

GCGraphicsExposures, &gcv);

if ( ! SDL_GC ) {

SDL_SetError("Couldn't create graphics context");

return(-1);

}

}

/* Set our colormaps when not setting a GL mode */

if ( ! (flags & SDL_OPENGL) ) {

XSetWindowColormap(SDL_Display, SDL_Window, SDL_XColorMap);

if( !SDL_windowid ) {

XSetWindowColormap(SDL_Display, FSwindow, SDL_XColorMap);

XSetWindowColormap(SDL_Display, WMwindow, SDL_XColorMap);

}

}

#if 0 /* This is an experiment - are the graphics faster now? - nope. */

if ( getenv("SDL_VIDEO_X11_BACKINGSTORE") )

#endif

/* Cache the window in the server, when possible */

{

Screen *xscreen;

XSetWindowAttributes a;

xscreen = ScreenOfDisplay(SDL_Display, SDL_Screen);

a.backing_store = DoesBackingStore(xscreen);

if ( a.backing_store != NotUseful ) {

XChangeWindowAttributes(SDL_Display, SDL_Window,

CWBackingStore, &a);

}

}

/* Update the internal keyboard state */

X11_SetKeyboardState(SDL_Display, NULL);

/* Map them both and go fullscreen, if requested */

if ( ! SDL_windowid ) {

XMapWindow(SDL_Display, SDL_Window);

XMapWindow(SDL_Display, WMwindow);

X11_WaitMapped(this, WMwindow);

if ( flags & SDL_FULLSCREEN ) {

screen->flags |= SDL_FULLSCREEN;

X11_EnterFullScreen(this);

} else {

screen->flags &= ~SDL_FULLSCREEN;

}

}

return(0);

}

static int X11_ResizeWindow(_THIS,

SDL_Surface *screen, int w, int h, Uint32 flags)

{

if ( ! SDL_windowid ) {

/* Resize the window manager window */

X11_SetSizeHints(this, w, h, flags);

current_w = w;

current_h = h;

XResizeWindow(SDL_Display, WMwindow, w, h);

/* Resize the fullscreen and display windows */

if ( flags & SDL_FULLSCREEN ) {

if ( screen->flags & SDL_FULLSCREEN ) {

X11_ResizeFullScreen(this);

} else {

screen->flags |= SDL_FULLSCREEN;

X11_EnterFullScreen(this);

}

} else {

if ( screen->flags & SDL_FULLSCREEN ) {

screen->flags &= ~SDL_FULLSCREEN;

X11_LeaveFullScreen(this);

}

}

XResizeWindow(SDL_Display, SDL_Window, w, h);

}

return(0);

}

SDL_Surface *X11_SetVideoMode(_THIS, SDL_Surface *current,

int width, int height, int bpp, Uint32 flags)

{

Uint32 saved_flags;

/* Lock the event thread, in multi-threading environments */

SDL_Lock_EventThread();

/* Check the combination of flags we were passed */

if ( flags & SDL_FULLSCREEN ) {

/* Clear fullscreen flag if not supported */

if ( SDL_windowid ) {

flags &= ~SDL_FULLSCREEN;

}

}

/* Flush any delayed updates */

XSync(GFX_Display, False);

/* Set up the X11 window */

saved_flags = current->flags;

if (SDL_Window && (saved_flags&SDL_OPENGL) == (flags&SDL_OPENGL)

&& bpp == current->format->BitsPerPixel) {

if (X11_ResizeWindow(this, current, width, height, flags) < 0) {

current = NULL;

goto done;

}

} else {

if (X11_CreateWindow(this,current,width,height,bpp,flags) < 0) {

current = NULL;

goto done;

}

}

/* Set up the new mode framebuffer */

if ( ((current->w != width) || (current->h != height)) ||

((saved_flags&SDL_OPENGL) != (flags&SDL_OPENGL)) ) {

current->w = width;

current->h = height;

current->pitch = SDL_CalculatePitch(current);

X11_ResizeImage(this, current, flags);

}

current->flags |= (flags&(SDL_RESIZABLE|SDL_NOFRAME));

done:

/* Release the event thread */

XSync(SDL_Display, False);

SDL_Unlock_EventThread();

/* We're done! */

return(current);

}

static int X11_ToggleFullScreen(_THIS, int on)

{

Uint32 event_thread;

/* Don't switch if we don't own the window */

if ( SDL_windowid ) {

return(0);

}

/* Don't lock if we are the event thread */

event_thread = SDL_EventThreadID();

if ( event_thread && (SDL_ThreadID() == event_thread) ) {

event_thread = 0;

}

if ( event_thread ) {

SDL_Lock_EventThread();

}

if ( on ) {

this->screen->flags |= SDL_FULLSCREEN;

X11_EnterFullScreen(this);

} else {

this->screen->flags &= ~SDL_FULLSCREEN;

X11_LeaveFullScreen(this);

}

X11_RefreshDisplay(this);

if ( event_thread ) {

SDL_Unlock_EventThread();

}

SDL_ResetKeyboard();

return(1);

}

/* Update the current mouse state and position */

static void X11_UpdateMouse(_THIS)

{

Window u1; int u2;

Window current_win;

int x, y;

unsigned int mask;

/* Lock the event thread, in multi-threading environments */

SDL_Lock_EventThread();

if ( XQueryPointer(SDL_Display, SDL_Window, &u1, &current_win,

&u2, &u2, &x, &y, &mask) ) {

if ( (x >= 0) && (x < SDL_VideoSurface->w) &&

(y >= 0) && (y < SDL_VideoSurface->h) ) {

SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS);

SDL_PrivateMouseMotion(0, 0, x, y);

} else {

SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS);

}

}

SDL_Unlock_EventThread();

}

/* simple colour distance metric. Supposed to be better than a plain

Euclidian distance anyway. */

#define COLOUR_FACTOR 3

#define LIGHT_FACTOR 1

#define COLOUR_DIST(r1, g1, b1, r2, g2, b2) \

(COLOUR_FACTOR * (abs(r1 - r2) + abs(g1 - g2) + abs(b1 - b2)) \

+ LIGHT_FACTOR * abs(r1 + g1 + b1 - (r2 + g2 + b2)))

static void allocate_nearest(_THIS, SDL_Color *colors,

SDL_Color *want, int nwant)

{

/*

* There is no way to know which ones to choose from, so we retrieve