sdl_x11modes.c

SDL库 在进行视频显示程序spcaview安装时必须的库文件

    /* Query the extension version */
    if ( !SDL_NAME(XineramaQueryExtension)(SDL_Display, major, minor) ||
         !SDL_NAME(XineramaIsActive)(SDL_Display) ) {
        return 0;
    }
    return 1;
}
#endif /* SDL_VIDEO_DRIVER_X11_XINERAMA */

#if SDL_VIDEO_DRIVER_X11_XRANDR
static int CheckXRandR(_THIS, int *major, int *minor)
{
    const char *env;

    /* Default the extension not available */
    *major = *minor = 0;

    /* Allow environment override */
    env = getenv("SDL_VIDEO_X11_XRANDR");
    if ( env && !SDL_atoi(env) ) {
        return 0;
    }

    /* This defaults off now, due to KDE window maximize problems */
    if ( !env ) {
        return 0;
    }

    if ( !SDL_X11_HAVE_XRANDR ) {
        return 0;
    }

    /* Query the extension version */
    if ( !XRRQueryVersion(SDL_Display, major, minor) ) {
        return 0;
    }
    return 1;
}
#endif /* SDL_VIDEO_DRIVER_X11_XRANDR */

#if SDL_VIDEO_DRIVER_X11_VIDMODE
static int CheckVidMode(_THIS, int *major, int *minor)
{
    const char *env;

    /* Default the extension not available */
    *major = *minor = 0;

    /* Allow environment override */
    env = getenv("SDL_VIDEO_X11_VIDMODE");
    if ( env && !SDL_atoi(env) ) {
        return 0;
    }
    
    /* Metro-X 4.3.0 and earlier has a broken implementation of
       XF86VidModeGetAllModeLines() - it hangs the client.
     */
    if ( SDL_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);
            fclose(metro_fp);
            version = major*100+minor*10+patch;
            if ( version < 431 ) {
                return 0;
            }
        }
    }

    /* Query the extension version */
    vm_error = -1;
    if ( !SDL_NAME(XF86VidModeQueryExtension)(SDL_Display, &vm_event, &vm_error) ||
         !SDL_NAME(XF86VidModeQueryVersion)(SDL_Display, major, minor) ) {
        return 0;
    }
    return 1;
}
#endif /* SDL_VIDEO_DRIVER_X11_VIDMODE */

#if SDL_VIDEO_DRIVER_X11_XME
static int CheckXME(_THIS, int *major, int *minor)
{
    const char *env;

    /* Default the extension not available */
    *major = *minor = 0;

    /* Allow environment override */
    env = getenv("SDL_VIDEO_X11_VIDMODE");
    if ( env && !SDL_atoi(env) ) {
        return 0;
    }
    
    /* Query the extension version */
    if ( !XiGMiscQueryVersion(SDL_Display, major, minor) ) {
        return 0;
    }
    return 1;
}
#endif /* SDL_VIDEO_DRIVER_X11_XME */

int X11_GetVideoModes(_THIS)
{
#if SDL_VIDEO_DRIVER_X11_XINERAMA
    int xinerama_major, xinerama_minor;
#endif
#if SDL_VIDEO_DRIVER_X11_XRANDR
    int xrandr_major, xrandr_minor;
    int nsizes;
    XRRScreenSize *sizes;
#endif
#if SDL_VIDEO_DRIVER_X11_VIDMODE
    int vm_major, vm_minor;
    int nmodes;
    SDL_NAME(XF86VidModeModeInfo) **modes;
#endif
#if SDL_VIDEO_DRIVER_X11_XME
    int xme_major, xme_minor;
    int ractive, nummodes;
    XiGMiscResolutionInfo *modelist;
#endif
    int i, n;
    int screen_w;
    int screen_h;

    use_xinerama = 0;
    use_xrandr = 0;
    use_vidmode = 0;
    use_xme = 0;
    screen_w = DisplayWidth(SDL_Display, SDL_Screen);
    screen_h = DisplayHeight(SDL_Display, SDL_Screen);

#if SDL_VIDEO_DRIVER_X11_XINERAMA
    /* Query Xinerama extention */
    if ( CheckXinerama(this, &xinerama_major, &xinerama_minor) ) {
        /* Find out which screen is the desired one */
        int desired = 0;
        int screens;
        int w, h;
        SDL_NAME(XineramaScreenInfo) *xinerama;

        const char *variable = SDL_getenv("SDL_VIDEO_FULLSCREEN_HEAD");
        if ( variable ) {
                desired = SDL_atoi(variable);
        }
#ifdef X11MODES_DEBUG
        printf("X11 detected Xinerama:\n");
#endif
        xinerama = SDL_NAME(XineramaQueryScreens)(SDL_Display, &screens);
        for ( i = 0; i < screens; i++ ) {
#ifdef X11MODES_DEBUG
            printf("xinerama %d: %dx%d+%d+%d\n",
                xinerama[i].screen_number,
                xinerama[i].width, xinerama[i].height,
                xinerama[i].x_org, xinerama[i].y_org);
#endif
            if ( xinerama[i].screen_number == desired ) {
                use_xinerama = 1;
                xinerama_info = xinerama[i];
            }
        }
        XFree(xinerama);

        if ( use_xinerama ) {
            SDL_modelist = (SDL_Rect **)SDL_malloc(3*sizeof(SDL_Rect *));
            if ( !SDL_modelist ) {
                SDL_OutOfMemory();
                return -1;
            }

            /* Add the full xinerama mode */
            n = 0;
            w = xinerama_info.width;
            h = xinerama_info.height;
            if ( screen_w > w || screen_h > h) {
                SDL_modelist[n] = (SDL_Rect *)SDL_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;
                }
            }

            /* Add the head xinerama mode */
            SDL_modelist[n] = (SDL_Rect *)SDL_malloc(sizeof(SDL_Rect));
            if ( SDL_modelist[n] ) {
                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;
        }
    }
#endif /* SDL_VIDEO_DRIVER_X11_XINERAMA */

#if SDL_VIDEO_DRIVER_X11_XRANDR
    /* XRandR */
    /* require at least XRandR v1.0 (arbitrary) */
    if ( CheckXRandR(this, &xrandr_major, &xrandr_minor) && (xrandr_major >= 1) )
    {
#ifdef X11MODES_DEBUG
        fprintf(stderr, "XRANDR: XRRQueryVersion: V%d.%d\n",
                xrandr_major, xrandr_minor);
#endif

        /* save the screen configuration since we must reference it
           each time we toggle modes.
        */
        screen_config = XRRGetScreenInfo(SDL_Display, SDL_Root);

        /* retrieve the list of resolution */
        sizes = XRRConfigSizes(screen_config, &nsizes);
        if (nsizes > 0) {
            if ( SDL_modelist ) {
                for ( i = 0; SDL_modelist[i]; ++i ) {
                    SDL_free(SDL_modelist[i]);
                }
                SDL_free(SDL_modelist);
            }
            SDL_modelist = (SDL_Rect **)malloc((nsizes+1)*sizeof(SDL_Rect *));
            if ( !SDL_modelist ) {
                SDL_OutOfMemory();
                return -1;
            }
            for ( i=0; i < nsizes; i++ ) {
                if ((SDL_modelist[i] =
                     (SDL_Rect *)malloc(sizeof(SDL_Rect))) == NULL)
                    break;
#ifdef X11MODES_DEBUG
                fprintf(stderr, "XRANDR: mode = %4d, w = %4d, h = %4d\n",
                        i, sizes[i].width, sizes[i].height);
#endif

                SDL_modelist[i]->x = 0;
                SDL_modelist[i]->y = 0;
                SDL_modelist[i]->w = sizes[i].width;
                SDL_modelist[i]->h = sizes[i].height;

            }
            /* sort the mode list descending as SDL expects */
            SDL_qsort(SDL_modelist, nsizes, sizeof *SDL_modelist, cmpmodelist);
            SDL_modelist[i] = NULL; /* terminator */

            use_xrandr = xrandr_major * 100 + xrandr_minor;
            saved_size_id = XRRConfigCurrentConfiguration(screen_config, &saved_rotation);
        }
    }
#endif /* SDL_VIDEO_DRIVER_X11_XRANDR */

#if SDL_VIDEO_DRIVER_X11_VIDMODE
    /* XVidMode */
    if ( !use_xrandr &&
#if SDL_VIDEO_DRIVER_X11_XINERAMA
         (!use_xinerama || xinerama_info.screen_number == 0) &&
#endif
         CheckVidMode(this, &vm_major, &vm_minor) &&
         SDL_NAME(XF86VidModeGetAllModeLines)(SDL_Display, SDL_Screen,&nmodes,&modes) )
    {
#ifdef X11MODES_DEBUG
        printf("VidMode modes: (unsorted)\n");
        for ( i = 0; i < nmodes; ++i ) {
            printf("Mode %d: %d x %d @ %d\n", i,
                    modes[i]->hdisplay, modes[i]->vdisplay,
                    (modes[i]->htotal && modes[i]->vtotal) ? (1000 * modes[i]->dotclock / (modes[i]->htotal * modes[i]->vtotal)) : 0 );
        }
#endif
        if ( SDL_modelist ) {
            for ( i = 0; SDL_modelist[i]; ++i ) {
                SDL_free(SDL_modelist[i]);
            }
            SDL_free(SDL_modelist);
        }
        SDL_modelist = (SDL_Rect **)SDL_malloc((nmodes+2)*sizeof(SDL_Rect *));
        if ( !SDL_modelist ) {
            SDL_OutOfMemory();
            return -1;
        }
        SDL_qsort(modes, nmodes, sizeof *modes, cmpmodes);
        n = 0;
        for ( i=0; i<nmodes; ++i ) {
            int w, h;

            /* Eliminate duplicate modes with different refresh rates */
            if ( i > 0 &&
                 modes[i]->hdisplay == modes[i-1]->hdisplay &&
                 modes[i]->vdisplay == modes[i-1]->vdisplay ) {
                    continue;
            }

            /* 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 *)SDL_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 *)SDL_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 /* SDL_VIDEO_DRIVER_X11_VIDMODE */

#if SDL_VIDEO_DRIVER_X11_XME
    /* XiG */
    modelist = NULL;
    /* first lets make sure we have the extension, and it's at least v2.0 */
    if ( CheckXME(this, &xme_major, &xme_minor) && xme_major >= 2 &&
         (nummodes = XiGMiscQueryResolutions(SDL_Display, SDL_Screen,
                                             0, /* view */
                                             &ractive, &modelist)) > 1 )
    {                                /* then we actually have some */
        int j;

        /* We get the list already sorted in descending order.
           We'll copy it in reverse order so SDL is happy */
#ifdef X11MODES_DEBUG
        fprintf(stderr, "XME: nummodes = %d, active mode = %d\n",
                nummodes, ractive);
#endif
        if ( SDL_modelist ) {
            for ( i = 0; SDL_modelist[i]; ++i ) {
                SDL_free(SDL_modelist[i]);
            }
            SDL_free(SDL_modelist);
        }
        SDL_modelist = (SDL_Rect **)SDL_malloc((nummodes+1)*sizeof(SDL_Rect *));
        if ( !SDL_modelist ) {
            SDL_OutOfMemory();
            return -1;
        }
        for ( i=0, j=nummodes-1; j>=0; i++, j-- ) {
            if ((SDL_modelist[i] = 
                 (SDL_Rect *)SDL_malloc(sizeof(SDL_Rect))) == NULL)
              break;
#ifdef X11MODES_DEBUG
            fprintf(stderr, "XME: mode = %4d, w = %4d, h = %4d\n",
                   i, modelist[i].width, modelist[i].height);
#endif