This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_x11modes.c
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/*
Simple DirectMedia Layer
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Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "SDL_config.h"
#if SDL_VIDEO_DRIVER_X11
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#include "SDL_hints.h"
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#include "SDL_x11video.h"
/*#define X11MODES_DEBUG*/
static int
get_visualinfo(Display * display, int screen, XVisualInfo * vinfo)
{
const char *visual_id = SDL_getenv("SDL_VIDEO_X11_VISUALID");
int depth;
/* Look for an exact visual, if requested */
if (visual_id) {
XVisualInfo *vi, template;
int nvis;
SDL_zero(template);
template.visualid = SDL_strtol(visual_id, NULL, 0);
vi = XGetVisualInfo(display, VisualIDMask, &template, &nvis);
if (vi) {
*vinfo = *vi;
XFree(vi);
return 0;
}
}
depth = DefaultDepth(display, screen);
if ((X11_UseDirectColorVisuals() &&
XMatchVisualInfo(display, screen, depth, DirectColor, vinfo)) ||
XMatchVisualInfo(display, screen, depth, TrueColor, vinfo) ||
XMatchVisualInfo(display, screen, depth, PseudoColor, vinfo) ||
XMatchVisualInfo(display, screen, depth, StaticColor, vinfo)) {
return 0;
}
return -1;
}
int
X11_GetVisualInfoFromVisual(Display * display, Visual * visual, XVisualInfo * vinfo)
{
XVisualInfo *vi;
int nvis;
vinfo->visualid = XVisualIDFromVisual(visual);
vi = XGetVisualInfo(display, VisualIDMask, vinfo, &nvis);
if (vi) {
*vinfo = *vi;
XFree(vi);
return 0;
}
return -1;
}
Uint32
X11_GetPixelFormatFromVisualInfo(Display * display, XVisualInfo * vinfo)
{
if (vinfo->class == DirectColor || vinfo->class == TrueColor) {
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
Rmask = vinfo->visual->red_mask;
Gmask = vinfo->visual->green_mask;
Bmask = vinfo->visual->blue_mask;
if (vinfo->depth == 32) {
Amask = (0xFFFFFFFF & ~(Rmask | Gmask | Bmask));
} else {
Amask = 0;
}
bpp = vinfo->depth;
if (bpp == 24) {
int i, n;
XPixmapFormatValues *p = XListPixmapFormats(display, &n);
if (p) {
for (i = 0; i < n; ++i) {
if (p[i].depth == 24) {
bpp = p[i].bits_per_pixel;
break;
}
}
XFree(p);
}
}
return SDL_MasksToPixelFormatEnum(bpp, Rmask, Gmask, Bmask, Amask);
}
if (vinfo->class == PseudoColor || vinfo->class == StaticColor) {
switch (vinfo->depth) {
case 8:
return SDL_PIXELTYPE_INDEX8;
case 4:
if (BitmapBitOrder(display) == LSBFirst) {
return SDL_PIXELFORMAT_INDEX4LSB;
} else {
return SDL_PIXELFORMAT_INDEX4MSB;
}
break;
case 1:
if (BitmapBitOrder(display) == LSBFirst) {
return SDL_PIXELFORMAT_INDEX1LSB;
} else {
return SDL_PIXELFORMAT_INDEX1MSB;
}
break;
}
}
return SDL_PIXELFORMAT_UNKNOWN;
}
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#if SDL_VIDEO_DRIVER_X11_XINERAMA
static SDL_bool CheckXinerama(Display * display, int *major, int *minor);
#endif
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int
X11_InitModes(_THIS)
{
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
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int screen, screencount;
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#if SDL_VIDEO_DRIVER_X11_XINERAMA
int xinerama_major, xinerama_minor;
XineramaScreenInfo * xinerama = NULL;
/* Query Xinerama extention
* NOTE: This works with Nvidia Twinview correctly, but you need version 302.17 (released on June 2012)
* or newer of the Nvidia binary drivers
*/
if (CheckXinerama(data->display, &xinerama_major, &xinerama_minor)) {
xinerama = XineramaQueryScreens(data->display, &screencount);
}
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if (!xinerama) {
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screencount = ScreenCount(data->display);
}
#else
screencount = ScreenCount(data->display);
#endif
for (screen = 0; screen < screencount; ++screen) {
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XVisualInfo vinfo;
SDL_VideoDisplay display;
SDL_DisplayData *displaydata;
SDL_DisplayMode mode;
XPixmapFormatValues *pixmapFormats;
int i, n;
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#if SDL_VIDEO_DRIVER_X11_XINERAMA
if (xinerama) {
if (get_visualinfo(data->display, 0, &vinfo) < 0) {
continue;
}
}
else {
if (get_visualinfo(data->display, screen, &vinfo) < 0) {
continue;
}
}
#else
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if (get_visualinfo(data->display, screen, &vinfo) < 0) {
continue;
}
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mode.format = X11_GetPixelFormatFromVisualInfo(data->display, &vinfo);
if (SDL_ISPIXELFORMAT_INDEXED(mode.format)) {
/* We don't support palettized modes now */
continue;
}
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#if SDL_VIDEO_DRIVER_X11_XINERAMA
if (xinerama) {
mode.w = xinerama[screen].width;
mode.h = xinerama[screen].height;
}
else {
mode.w = DisplayWidth(data->display, screen);
mode.h = DisplayHeight(data->display, screen);
}
#else
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mode.w = DisplayWidth(data->display, screen);
mode.h = DisplayHeight(data->display, screen);
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mode.refresh_rate = 0;
mode.driverdata = NULL;
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displaydata = (SDL_DisplayData *) SDL_calloc(1, sizeof(*displaydata));
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if (!displaydata) {
continue;
}
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#if SDL_VIDEO_DRIVER_X11_XINERAMA
/* Most of SDL's calls to X11 are unwaware of Xinerama, and to X11 standard calls, when Xinerama is active,
* there's only one screen available. So we force the screen number to zero and
* let Xinerama specific code handle specific functionality using displaydata->xinerama_info
*/
if (xinerama) {
displaydata->screen = 0;
displaydata->use_xinerama = xinerama_major * 100 + xinerama_minor;
displaydata->xinerama_info = xinerama[screen];
}
else displaydata->screen = screen;
#else
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displaydata->screen = screen;
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displaydata->visual = vinfo.visual;
displaydata->depth = vinfo.depth;
displaydata->scanline_pad = SDL_BYTESPERPIXEL(mode.format) * 8;
pixmapFormats = XListPixmapFormats(data->display, &n);
if (pixmapFormats) {
for (i = 0; i < n; ++i) {
if (pixmapFormats[i].depth == displaydata->depth) {
displaydata->scanline_pad = pixmapFormats[i].scanline_pad;
break;
}
}
XFree(pixmapFormats);
}
SDL_zero(display);
display.desktop_mode = mode;
display.current_mode = mode;
display.driverdata = displaydata;
SDL_AddVideoDisplay(&display);
}
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#if SDL_VIDEO_DRIVER_X11_XINERAMA
if (xinerama) XFree(xinerama);
#endif
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if (_this->num_displays == 0) {
SDL_SetError("No available displays");
return -1;
}
return 0;
}
/* Global for the error handler */
int vm_event, vm_error = -1;
#if SDL_VIDEO_DRIVER_X11_XINERAMA
static SDL_bool
CheckXinerama(Display * display, int *major, int *minor)
{
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int event_base = 0;
int error_base = 0;
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const char *env;
/* Default the extension not available */
*major = *minor = 0;
/* Allow environment override */
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env = SDL_GetHint(SDL_HINT_VIDEO_X11_XINERAMA);
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if (env && !SDL_atoi(env)) {
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#ifdef X11MODES_DEBUG
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printf("Xinerama disabled due to hint\n");
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return SDL_FALSE;
}
if (!SDL_X11_HAVE_XINERAMA) {
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#ifdef X11MODES_DEBUG
printf("Xinerama support not available\n");
#endif
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return SDL_FALSE;
}
/* Query the extension version */
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if (!XineramaQueryExtension(display, &event_base, &error_base) ||
!XineramaQueryVersion(display, major, minor) ||
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!XineramaIsActive(display)) {
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#ifdef X11MODES_DEBUG
printf("Xinerama not active on the display\n");
#endif
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return SDL_FALSE;
}
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#ifdef X11MODES_DEBUG
printf("Xinerama available!\n");
#endif
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return SDL_TRUE;
}
#endif /* SDL_VIDEO_DRIVER_X11_XINERAMA */
#if SDL_VIDEO_DRIVER_X11_XRANDR
static SDL_bool
CheckXRandR(Display * display, int *major, int *minor)
{
const char *env;
/* Default the extension not available */
*major = *minor = 0;
/* Allow environment override */
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env = SDL_GetHint(SDL_HINT_VIDEO_X11_XRANDR);
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if (env && !SDL_atoi(env)) {
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#ifdef X11MODES_DEBUG
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printf("XRandR disabled due to hint\n");
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return SDL_FALSE;
}
if (!SDL_X11_HAVE_XRANDR) {
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#ifdef X11MODES_DEBUG
printf("XRandR support not available\n");
#endif
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return SDL_FALSE;
}
/* Query the extension version */
if (!XRRQueryVersion(display, major, minor)) {
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#ifdef X11MODES_DEBUG
printf("XRandR not active on the display\n");
#endif
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return SDL_FALSE;
}
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#ifdef X11MODES_DEBUG
printf("XRandR available!\n");
#endif
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return SDL_TRUE;
}
#endif /* SDL_VIDEO_DRIVER_X11_XRANDR */
#if SDL_VIDEO_DRIVER_X11_XVIDMODE
static SDL_bool
CheckVidMode(Display * display, int *major, int *minor)
{
const char *env;
/* Default the extension not available */
*major = *minor = 0;
/* Allow environment override */
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env = SDL_GetHint(SDL_HINT_VIDEO_X11_XVIDMODE);
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if (env && !SDL_atoi(env)) {
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#ifdef X11MODES_DEBUG
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printf("XVidMode disabled due to hint\n");
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return SDL_FALSE;
}
if (!SDL_X11_HAVE_XVIDMODE) {
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#ifdef X11MODES_DEBUG
printf("XVidMode support not available\n");
#endif
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return SDL_FALSE;
}
/* Query the extension version */
vm_error = -1;
if (!XF86VidModeQueryExtension(display, &vm_event, &vm_error)
|| !XF86VidModeQueryVersion(display, major, minor)) {
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#ifdef X11MODES_DEBUG
printf("XVidMode not active on the display\n");
#endif
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return SDL_FALSE;
}
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#ifdef X11MODES_DEBUG
printf("XVidMode available!\n");
#endif
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return SDL_TRUE;
}
static
Bool XF86VidModeGetModeInfo(Display * dpy, int scr,
XF86VidModeModeInfo* info)
{
Bool retval;
int dotclock;
XF86VidModeModeLine l;
SDL_zerop(info);
SDL_zero(l);
retval = XF86VidModeGetModeLine(dpy, scr, &dotclock, &l);
info->dotclock = dotclock;
info->hdisplay = l.hdisplay;
info->hsyncstart = l.hsyncstart;
info->hsyncend = l.hsyncend;
info->htotal = l.htotal;
info->hskew = l.hskew;
info->vdisplay = l.vdisplay;
info->vsyncstart = l.vsyncstart;
info->vsyncend = l.vsyncend;
info->vtotal = l.vtotal;
info->flags = l.flags;
info->privsize = l.privsize;
info->private = l.private;
return retval;
}
static int
calculate_rate(XF86VidModeModeInfo * info)
{
return (info->htotal
&& info->vtotal) ? (1000 * info->dotclock / (info->htotal *
info->vtotal)) : 0;
}
static void
save_mode(Display * display, SDL_DisplayData * data)
{
XF86VidModeGetModeInfo(display, data->screen,
&data->saved_mode);
XF86VidModeGetViewPort(display, data->screen,
&data->saved_view.x,
&data->saved_view.y);
}
/*
static void
restore_mode(Display * display, SDL_DisplayData * data)
{
XF86VidModeModeInfo mode;
if (XF86VidModeGetModeInfo(display, data->screen, &mode)) {
if (SDL_memcmp(&mode, &data->saved_mode, sizeof(mode)) != 0) {
XF86VidModeSwitchToMode(display, data->screen, &data->saved_mode);
}
}
if ((data->saved_view.x != 0) || (data->saved_view.y != 0)) {
XF86VidModeSetViewPort(display, data->screen,
data->saved_view.x,
data->saved_view.y);
}
}
*/
#endif /* SDL_VIDEO_DRIVER_X11_XVIDMODE */
void
X11_GetDisplayModes(_THIS, SDL_VideoDisplay * sdl_display)
{
Display *display = ((SDL_VideoData *) _this->driverdata)->display;
SDL_DisplayData *data = (SDL_DisplayData *) sdl_display->driverdata;
#if SDL_VIDEO_DRIVER_X11_XRANDR
int xrandr_major, xrandr_minor;
int nsizes, nrates;
XRRScreenSize *sizes;
short *rates;
#endif
#if SDL_VIDEO_DRIVER_X11_XVIDMODE
int vm_major, vm_minor;
int nmodes;
XF86VidModeModeInfo ** modes;
#endif
int screen_w;
int screen_h;
SDL_DisplayMode mode;
/* Unfortunately X11 requires the window to be created with the correct
* visual and depth ahead of time, but the SDL API allows you to create
* a window before setting the fullscreen display mode. This means that
* we have to use the same format for all windows and all display modes.
* (or support recreating the window with a new visual behind the scenes)
*/
mode.format = sdl_display->current_mode.format;
mode.driverdata = NULL;
screen_w = DisplayWidth(display, data->screen);
screen_h = DisplayHeight(display, data->screen);
#if SDL_VIDEO_DRIVER_X11_XINERAMA
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if (data->use_xinerama) {
/* Add the full (both screens combined) xinerama mode only on the display that starts at 0,0 */
if (!data->xinerama_info.x_org && !data->xinerama_info.y_org &&
(screen_w > data->xinerama_info.width || screen_h > data->xinerama_info.height)) {
mode.w = screen_w;
mode.h = screen_h;
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mode.refresh_rate = 0;
SDL_AddDisplayMode(sdl_display, &mode);
}
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/* Add the head xinerama mode */
mode.w = data->xinerama_info.width;
mode.h = data->xinerama_info.height;
mode.refresh_rate = 0;
SDL_AddDisplayMode(sdl_display, &mode);
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}
#endif /* SDL_VIDEO_DRIVER_X11_XINERAMA */
#if SDL_VIDEO_DRIVER_X11_XRANDR
/* XRandR */
/* require at least XRandR v1.0 (arbitrary) */
if (CheckXRandR(display, &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.
*/
data->screen_config =
XRRGetScreenInfo(display, RootWindow(display, data->screen));
/* retrieve the list of resolution */
sizes = XRRConfigSizes(data->screen_config, &nsizes);
if (nsizes > 0) {
int i, j;
for (i = 0; i < nsizes; i++) {
mode.w = sizes[i].width;
mode.h = sizes[i].height;
rates = XRRConfigRates(data->screen_config, i, &nrates);
for (j = 0; j < nrates; ++j) {
mode.refresh_rate = rates[j];
#ifdef X11MODES_DEBUG
fprintf(stderr,
"XRANDR: mode = %4d[%d], w = %4d, h = %4d, rate = %4d\n",
i, j, mode.w, mode.h, mode.refresh_rate);
#endif
SDL_AddDisplayMode(sdl_display, &mode);
}
}
data->use_xrandr = xrandr_major * 100 + xrandr_minor;
data->saved_size =
XRRConfigCurrentConfiguration(data->screen_config,
&data->saved_rotation);
data->saved_rate = XRRConfigCurrentRate(data->screen_config);
}
}
#endif /* SDL_VIDEO_DRIVER_X11_XRANDR */
#if SDL_VIDEO_DRIVER_X11_XVIDMODE
/* XVidMode */
if (!data->use_xrandr &&
#if SDL_VIDEO_DRIVER_X11_XINERAMA
(!data->use_xinerama || data->xinerama_info.screen_number == 0) &&
#endif
CheckVidMode(display, &vm_major, &vm_minor) &&
XF86VidModeGetAllModeLines(display, data->screen, &nmodes, &modes)) {
int i;
#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,
calculate_rate(modes[i]));
}
#endif
for (i = 0; i < nmodes; ++i) {
mode.w = modes[i]->hdisplay;
mode.h = modes[i]->vdisplay;
mode.refresh_rate = calculate_rate(modes[i]);
SDL_AddDisplayMode(sdl_display, &mode);
}
XFree(modes);
data->use_vidmode = vm_major * 100 + vm_minor;
save_mode(display, data);
}
#endif /* SDL_VIDEO_DRIVER_X11_XVIDMODE */
if (!data->use_xrandr && !data->use_vidmode) {
mode.w = screen_w;
mode.h = screen_h;
mode.refresh_rate = 0;
SDL_AddDisplayMode(sdl_display, &mode);
}
#ifdef X11MODES_DEBUG
if (data->use_xinerama) {
printf("Xinerama is enabled\n");
}
if (data->use_xrandr) {
printf("XRandR is enabled\n");
}
if (data->use_vidmode) {
printf("VidMode is enabled\n");
}
#endif /* X11MODES_DEBUG */
}
static void
get_real_resolution(Display * display, SDL_DisplayData * data, int *w, int *h,
int *rate)
{
#if SDL_VIDEO_DRIVER_X11_XRANDR
if (data->use_xrandr) {
int nsizes;
XRRScreenSize *sizes;
sizes = XRRConfigSizes(data->screen_config, &nsizes);
if (nsizes > 0) {
int cur_size;
Rotation cur_rotation;
cur_size =
XRRConfigCurrentConfiguration(data->screen_config,
&cur_rotation);
*w = sizes[cur_size].width;
*h = sizes[cur_size].height;
*rate = XRRConfigCurrentRate(data->screen_config);
#ifdef X11MODES_DEBUG
fprintf(stderr,
"XRANDR: get_real_resolution: w = %d, h = %d, rate = %d\n",
*w, *h, *rate);
#endif
return;
}
}
#endif /* SDL_VIDEO_DRIVER_X11_XRANDR */
#if SDL_VIDEO_DRIVER_X11_XVIDMODE
if (data->use_vidmode) {
XF86VidModeModeInfo mode;
if (XF86VidModeGetModeInfo(display, data->screen, &mode)) {
*w = mode.hdisplay;
*h = mode.vdisplay;
*rate = calculate_rate(&mode);
return;
}
}
#endif /* SDL_VIDEO_DRIVER_X11_XVIDMODE */
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#if SDL_VIDEO_DRIVER_X11_XINERAMA
if (data->use_xinerama) {
*w = data->xinerama_info.width;
*h = data->xinerama_info.height;
*rate = 0;
return;
}
#endif /* SDL_VIDEO_DRIVER_X11_XINERAMA */
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*w = DisplayWidth(display, data->screen);
*h = DisplayHeight(display, data->screen);
*rate = 0;
}
static void
set_best_resolution(Display * display, SDL_DisplayData * data, int w, int h,
int rate)
{
int real_w, real_h, real_rate;
/* check current mode so we can avoid uneccessary mode changes */
get_real_resolution(display, data, &real_w, &real_h, &real_rate);
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if (w == real_w && h == real_h && (!rate || !real_rate || rate == real_rate)) {
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return;
}
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#if SDL_VIDEO_DRIVER_X11_XRANDR
if (data->use_xrandr) {
#ifdef X11MODES_DEBUG
fprintf(stderr, "XRANDR: set_best_resolution(): w = %d, h = %d\n",
w, h);
#endif
int i, nsizes, nrates;
int best;
int best_rate;
XRRScreenSize *sizes;
short *rates;
/* find the smallest resolution that is at least as big as the user requested */
best = -1;
sizes = XRRConfigSizes(data->screen_config, &nsizes);
for (i = 0; i < nsizes; ++i) {
if (sizes[i].width < w || sizes[i].height < h) {
continue;
}
if (sizes[i].width == w && sizes[i].height == h) {
best = i;
break;
}
if (best == -1 ||
(sizes[i].width < sizes[best].width) ||
(sizes[i].width == sizes[best].width
&& sizes[i].height < sizes[best].height)) {
best = i;
}
}
if (best >= 0) {
best_rate = 0;
rates = XRRConfigRates(data->screen_config, best, &nrates);
for (i = 0; i < nrates; ++i) {
if (rates[i] == rate) {
best_rate = rate;
break;
}
if (!rate) {
/* Higher is better, right? */
if (rates[i] > best_rate) {
best_rate = rates[i];
}
} else {
if (SDL_abs(rates[i] - rate) < SDL_abs(best_rate - rate)) {
best_rate = rates[i];
}
}
}
XRRSetScreenConfigAndRate(display, data->screen_config,
RootWindow(display, data->screen), best,
data->saved_rotation, best_rate,
CurrentTime);
}
return;
}
#endif /* SDL_VIDEO_DRIVER_X11_XRANDR */
#if SDL_VIDEO_DRIVER_X11_XVIDMODE
if (data->use_vidmode) {
XF86VidModeModeInfo ** modes;
int i, nmodes;
int best;
if (XF86VidModeGetAllModeLines(display, data->screen, &nmodes, &modes)) {
best = -1;
for (i = 0; i < nmodes; ++i) {
if (modes[i]->hdisplay < w || modes[i]->vdisplay < h) {
continue;
}
if (best == -1 ||
(modes[i]->hdisplay < modes[best]->hdisplay) ||
(modes[i]->hdisplay == modes[best]->hdisplay
&& modes[i]->vdisplay < modes[best]->vdisplay)) {
best = i;
continue;
}
if ((modes[i]->hdisplay == modes[best]->hdisplay) &&
(modes[i]->vdisplay == modes[best]->vdisplay)) {
if (!rate) {
/* Higher is better, right? */
if (calculate_rate(modes[i]) >
calculate_rate(modes[best])) {
best = i;
}
} else {
if (SDL_abs(calculate_rate(modes[i]) - rate) <
SDL_abs(calculate_rate(modes[best]) - rate)) {
best = i;
}
}
}
}
if (best >= 0) {
#ifdef X11MODES_DEBUG
printf("Best Mode %d: %d x %d @ %d\n", best,
modes[best]->hdisplay, modes[best]->vdisplay,
calculate_rate(modes[best]));
#endif
XF86VidModeSwitchToMode(display, data->screen, modes[best]);
}
XFree(modes);
}
return;
}
#endif /* SDL_VIDEO_DRIVER_X11_XVIDMODE */
}
int
X11_SetDisplayMode(_THIS, SDL_VideoDisplay * sdl_display, SDL_DisplayMode * mode)
{
Display *display = ((SDL_VideoData *) _this->driverdata)->display;
SDL_DisplayData *data = (SDL_DisplayData *) sdl_display->driverdata;
set_best_resolution(display, data, mode->w, mode->h, mode->refresh_rate);
return 0;
}
void
X11_QuitModes(_THIS)
{
}
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int
X11_GetDisplayBounds(_THIS, SDL_VideoDisplay * sdl_display, SDL_Rect * rect)
{
SDL_DisplayData *data = (SDL_DisplayData *) sdl_display->driverdata;
#if SDL_VIDEO_DRIVER_X11_XINERAMA
if (data && data->use_xinerama) {
rect->x = data->xinerama_info.x_org;
rect->y = data->xinerama_info.y_org;
rect->w = data->xinerama_info.width;
rect->h = data->xinerama_info.height;
return 0;
}
#endif
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rect->x = 0;
rect->y = 0;
rect->w = sdl_display->current_mode.w;
rect->h = sdl_display->current_mode.h;
return 0;
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#endif /* SDL_VIDEO_DRIVER_X11 */
/* vi: set ts=4 sw=4 expandtab: */