sdl_x11modes.c

Simple DirectMedia Layer - Simple DirectMedia Layer 是一个跨平台的多媒体库设计用来提供快速图形framebuffer和音频驱动。应用MPEG为软件

/*
    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
    [e-mail]
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id: SDL_x11modes.c,v 1.14 2002/09/30 00:35:25 slouken Exp $";
#endif

/* Utilities for getting and setting the X display mode */

#include <stdlib.h>
#include <string.h>

#include "SDL_timer.h"
#include "SDL_error.h"
#include "SDL_events.h"
#include "SDL_events_c.h"
#include "SDL_x11video.h"
#include "SDL_x11wm_c.h"
#include "SDL_x11modes_c.h"
#include "SDL_x11image_c.h"

#ifdef HAVE_XINERAMA
#include <XFree86/extensions/Xinerama.h>
#endif 

#define MAX(a, b)        (a > b ? a : b)

#ifdef XFREE86_VM
Bool SDL_NAME(XF86VidModeGetModeInfo)(Display *dpy, int scr, SDL_NAME(XF86VidModeModeInfo) *info)
{
    SDL_NAME(XF86VidModeModeLine) *l = (SDL_NAME(XF86VidModeModeLine)*)((char*)info + sizeof info->dotclock);
    return SDL_NAME(XF86VidModeGetModeLine)(dpy, scr, &info->dotclock, l);
}
#endif /* XFREE86_VM */

#ifdef XFREE86_VM
static void save_mode(_THIS)
{
    memset(&saved_mode, 0, sizeof(saved_mode));
    SDL_NAME(XF86VidModeGetModeInfo)(SDL_Display,SDL_Screen,&saved_mode);
    SDL_NAME(XF86VidModeGetViewPort)(SDL_Display,SDL_Screen,&saved_view.x,&saved_view.y);
}
#endif

#ifdef XFREE86_VM
static void restore_mode(_THIS)
{
    SDL_NAME(XF86VidModeModeLine) mode;
    int unused;

    if ( SDL_NAME(XF86VidModeGetModeLine)(SDL_Display, SDL_Screen, &unused, &mode) ) {
        if ( (saved_mode.hdisplay != mode.hdisplay) ||
             (saved_mode.vdisplay != mode.vdisplay) ) {
            SDL_NAME(XF86VidModeSwitchToMode)(SDL_Display, SDL_Screen, &saved_mode);
        }
    }
    if ( (saved_view.x != 0) || (saved_view.y != 0) ) {
        SDL_NAME(XF86VidModeSetViewPort)(SDL_Display, SDL_Screen, saved_view.x, saved_view.y);
    }
}
#endif

#ifdef XFREE86_VM
static int cmpmodes(const void *va, const void *vb)
{
    const SDL_NAME(XF86VidModeModeInfo) *a = *(const SDL_NAME(XF86VidModeModeInfo)**)va;
    const SDL_NAME(XF86VidModeModeInfo) *b = *(const SDL_NAME(XF86VidModeModeInfo)**)vb;
    if(a->hdisplay > b->hdisplay)
        return -1;
    return b->vdisplay - a->vdisplay;
}
#endif

static void get_real_resolution(_THIS, int* w, int* h);

static void set_best_resolution(_THIS, int width, int height)
{
#ifdef XFREE86_VM
    if ( use_vidmode ) {
        SDL_NAME(XF86VidModeModeLine) mode;
        SDL_NAME(XF86VidModeModeInfo) **modes;
        int i;
        int nmodes;

        if ( SDL_NAME(XF86VidModeGetModeLine)(SDL_Display, SDL_Screen, &i, &mode) &&
             SDL_NAME(XF86VidModeGetAllModeLines)(SDL_Display,SDL_Screen,&nmodes,&modes)){
            qsort(modes, nmodes, sizeof *modes, cmpmodes);
#ifdef XFREE86_DEBUG
            printf("Available modes:\n");
            for ( i = 0; i < nmodes; ++i ) {
                printf("Mode %d: %dx%d\n", i,
                        modes[i]->hdisplay, modes[i]->vdisplay);
            }
#endif
            for ( i = nmodes-1; i > 0 ; --i ) {
                if ( (modes[i]->hdisplay >= width) &&
                     (modes[i]->vdisplay >= height) )
                    break;
            }
            if ( (modes[i]->hdisplay != mode.hdisplay) ||
                 (modes[i]->vdisplay != mode.vdisplay) ) {
                SDL_NAME(XF86VidModeSwitchToMode)(SDL_Display, SDL_Screen, modes[i]);
            }
            XFree(modes);
        }
    }
#endif /* XFREE86_VM */

                                /* XiG */
#ifdef HAVE_XIGXME
#ifdef XIG_DEBUG
    fprintf(stderr, "XME: set_best_resolution(): w = %d, h = %d\n",
            width, height);
#endif
    if ( SDL_modelist ) {
        int i;

        for ( i=0; SDL_modelist[i]; ++i ) {
            if ( (SDL_modelist[i]->w >= width) &&
                 (SDL_modelist[i]->h >= height) ) {
                break;
            }
        }
        
        if ( SDL_modelist[i] ) { /* found one, lets try it */
            int w, h;        

            /* check current mode so we can avoid uneccessary mode changes */
            get_real_resolution(this, &w, &h);

            if ( (SDL_modelist[i]->w != w) || (SDL_modelist[i]->h != h) ) {
# ifdef XIG_DEBUG
                fprintf(stderr, "XME: set_best_resolution: "
                        "XiGMiscChangeResolution: %d %d\n",
                        SDL_modelist[s]->w, SDL_modelist[s]->h);
# endif
                XiGMiscChangeResolution(SDL_Display, 
                                        SDL_Screen,
                                        0, /* view */
                                        SDL_modelist[i]->w, 
                                        SDL_modelist[i]->h, 
                                        0);
                XSync(SDL_Display, False);
            }
        }
    }
#endif /* HAVE_XIGXME */

}

static void get_real_resolution(_THIS, int* w, int* h)
{
#ifdef XFREE86_VM
    if ( use_vidmode ) {
        SDL_NAME(XF86VidModeModeLine) mode;
        int unused;

        if ( SDL_NAME(XF86VidModeGetModeLine)(SDL_Display, SDL_Screen, &unused, &mode) ) {
            *w = mode.hdisplay;
            *h = mode.vdisplay;
            return;
        }
    }
#endif

#ifdef HAVE_XIGXME
    if ( use_xme ) {
        int ractive;
        XiGMiscResolutionInfo *modelist;

        XiGMiscQueryResolutions(SDL_Display, SDL_Screen,
                                0, /* view */
                                &ractive, &modelist);
        *w = modelist[ractive].width;
        *h = modelist[ractive].height;
#ifdef XIG_DEBUG
        fprintf(stderr, "XME: get_real_resolution: w = %d h = %d\n", *w, *h);
#endif
        XFree(modelist);
        return;
    }
#endif /* XIG_XME */

    *w = DisplayWidth(SDL_Display, SDL_Screen);
    *h = DisplayHeight(SDL_Display, SDL_Screen);
}

/* Called after mapping a window - waits until the window is mapped */
void X11_WaitMapped(_THIS, Window win)
{
    XEvent event;
    do {
        XMaskEvent(SDL_Display, StructureNotifyMask, &event);
    } while ( (event.type != MapNotify) || (event.xmap.event != win) );
}

/* Called after unmapping a window - waits until the window is unmapped */
void X11_WaitUnmapped(_THIS, Window win)
{
    XEvent event;
    do {
        XMaskEvent(SDL_Display, StructureNotifyMask, &event);
    } while ( (event.type != UnmapNotify) || (event.xunmap.event != win) );
}

static void move_cursor_to(_THIS, int x, int y)
{
    XWarpPointer(SDL_Display, None, SDL_Root, 0, 0, 0, 0, x, y);
}

static int add_visual(_THIS, int depth, int class)
{
    XVisualInfo vi;
    if(XMatchVisualInfo(SDL_Display, SDL_Screen, depth, class, &vi)) {
        int n = this->hidden->nvisuals;
        this->hidden->visuals[n].depth = vi.depth;
        this->hidden->visuals[n].visual = vi.visual;
        this->hidden->nvisuals++;
    }
    return(this->hidden->nvisuals);
}
static int add_visual_byid(_THIS, const char *visual_id)
{
    XVisualInfo *vi, template;
    int nvis;

    if ( visual_id ) {
        memset(&template, 0, (sizeof template));
        template.visualid = strtol(visual_id, NULL, 0);
        vi = XGetVisualInfo(SDL_Display, VisualIDMask, &template, &nvis);
        if ( vi ) {
            int n = this->hidden->nvisuals;
            this->hidden->visuals[n].depth = vi->depth;
            this->hidden->visuals[n].visual = vi->visual;
            this->hidden->nvisuals++;
            XFree(vi);
        }
    }
    return(this->hidden->nvisuals);
}

/* Global for the error handler */
int vm_event, vm_error = -1;

int X11_GetVideoModes(_THIS)
{
#ifdef XFREE86_VM
    int buggy_X11;
    int vm_major, vm_minor;
    int nmodes;
    SDL_NAME(XF86VidModeModeInfo) **modes;
#endif
#ifdef HAVE_XIGXME
    int xme_major, xme_minor;
    int ractive, nummodes;
    XiGMiscResolutionInfo *modelist;
#endif
    int i, n;
    int screen_w;
    int screen_h;

    vm_error = -1;
    use_vidmode = 0;
    screen_w = DisplayWidth(SDL_Display, SDL_Screen);
    screen_h = DisplayHeight(SDL_Display, SDL_Screen);

#ifdef XFREE86_VM
    /* Metro-X 4.3.0 and earlier has a broken implementation of
       XF86VidModeGetAllModeLines() - it hangs the client.
     */
    buggy_X11 = 0;
    if ( strcmp(ServerVendor(SDL_Display), "Metro Link Incorporated") == 0 ) {
        FILE *metro_fp;

        metro_fp = fopen("/usr/X11R6/lib/X11/Metro/.version", "r");
        if ( metro_fp != NULL ) {
            int major, minor, patch, version;
            major = 0; minor = 0; patch = 0;
            fscanf(metro_fp, "%d.%d.%d", &major, &minor, &patch);
            version = major*100+minor*10+patch;
            if ( version < 431 ) {
                buggy_X11 = 1;
            }
            fclose(metro_fp);
        }
    }
#if defined(__alpha__) || defined(__powerpc__)
    /* The alpha and PPC XFree86 servers are also buggy */
    buggy_X11 = 1;
#endif
    /* Enumerate the available fullscreen modes */
    if ( ! buggy_X11 ) {
        if ( SDL_NAME(XF86VidModeQueryExtension)(SDL_Display, &vm_event, &vm_error) &&
              SDL_NAME(XF86VidModeQueryVersion)(SDL_Display, &vm_major, &vm_minor) ) {
#ifdef BROKEN_XFREE86_4001
#ifdef X_XF86VidModeGetDotClocks  /* Compiled under XFree86 4.0 */
                /* Earlier X servers hang when doing vidmode */
                if ( vm_major < 2 ) {
#ifdef XFREE86_DEBUG
                    printf("Compiled under XFree86 4.0, server is XFree86 3.X\n");
#endif
                    buggy_X11 = 1;
                }
#else
                /* XFree86 3.X code works with XFree86 4.0 servers */;
#endif /* XFree86 4.0 */
#endif /* XFree86 4.02 and newer are fixed wrt backwards compatibility */
        } else {
            buggy_X11 = 1;
        }
    }
    if ( ! buggy_X11 &&
         SDL_NAME(XF86VidModeGetAllModeLines)(SDL_Display, SDL_Screen,&nmodes,&modes) ) {

        qsort(modes, nmodes, sizeof *modes, cmpmodes);
        SDL_modelist = (SDL_Rect **)malloc((nmodes+2)*sizeof(SDL_Rect *));
        if ( SDL_modelist ) {
            n = 0;
            for ( i=0; i<nmodes; ++i ) {
                int w, h;

                /* Check to see if we should add the screen size (Xinerama) */
                w = modes[i]->hdisplay;
                h = modes[i]->vdisplay;
                if ( (screen_w * screen_h) >= (w * h) ) {
                    if ( (screen_w != w) || (screen_h != h) ) {
                        SDL_modelist[n] = (SDL_Rect *)malloc(sizeof(SDL_Rect));
                        if ( SDL_modelist[n] ) {
                            SDL_modelist[n]->x = 0;
                            SDL_modelist[n]->y = 0;
                            SDL_modelist[n]->w = screen_w;
                            SDL_modelist[n]->h = screen_h;
                            ++n;
                        }
                    }
                    screen_w = 0;
                    screen_h = 0;
                }

                /* Add the size from the video mode list */
                SDL_modelist[n] = (SDL_Rect *)malloc(sizeof(SDL_Rect));
                if ( SDL_modelist[n] == NULL ) {
                    break;
                }
                SDL_modelist[n]->x = 0;
                SDL_modelist[n]->y = 0;
                SDL_modelist[n]->w = w;
                SDL_modelist[n]->h = h;
                ++n;
            }
            SDL_modelist[n] = NULL;
        }
        XFree(modes);

        use_vidmode = vm_major * 100 + vm_minor;
        save_mode(this);
    }
#endif /* XFREE86_VM */

                                /* XiG */
#ifdef HAVE_XIGXME
    /* first lets make sure we have the extension, and it's at least v2.0 */
    if (XiGMiscQueryVersion(SDL_Display, &xme_major, &xme_minor)) {
#ifdef XIG_DEBUG
        fprintf(stderr, "XME: XiGMiscQueryVersion: V%d.%d\n",
                xme_major, xme_minor);
#endif
        /* work around a XiGMisc bogosity in our version of libXext */
        if (xme_major == 0 && xme_major == 0) {
            /* Ideally libxme would spit this out, but the problem is that
               the right Query func will never be called if using the bogus
               libXext version.
             */
            fprintf(stderr, 
"XME: If you are using Xi Graphics CDE and a Summit server, you need to\n"
"XME: get the libXext update from our ftp site before fullscreen switching\n"
"XME: will work.  Fullscreen switching is only supported on Summit Servers\n");
          }
    } else {