/*

Simple DirectMedia Layer

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

#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;

}

#if SDL_VIDEO_DRIVER_X11_XINERAMA

static SDL_bool CheckXinerama(Display * display, int *major, int *minor);

#endif

int

X11_InitModes(_THIS)

{

SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;

#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);

if (!xinerama) screencount = ScreenCount(data->display);

}

else {

screencount = ScreenCount(data->display);

}

#else

screencount = ScreenCount(data->display);

#endif

for (screen = 0; screen < screencount; ++screen) {

XVisualInfo vinfo;

SDL_VideoDisplay display;

SDL_DisplayData *displaydata;

SDL_DisplayMode mode;

XPixmapFormatValues *pixmapFormats;

int i, n;

#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

if (get_visualinfo(data->display, screen, &vinfo) < 0) {

continue;

}

mode.format = X11_GetPixelFormatFromVisualInfo(data->display, &vinfo);

if (SDL_ISPIXELFORMAT_INDEXED(mode.format)) {

/* We don't support palettized modes now */

continue;

}

#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

mode.w = DisplayWidth(data->display, screen);

mode.h = DisplayHeight(data->display, screen);

mode.refresh_rate = 0;

mode.driverdata = NULL;

displaydata = (SDL_DisplayData *) SDL_malloc(sizeof(*displaydata));

if (!displaydata) {

continue;

}

#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

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);

}

#if SDL_VIDEO_DRIVER_X11_XINERAMA

if (xinerama) XFree(xinerama);

#endif

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)

{

int event_base = 0;

int error_base = 0;

const char *env;

/* Default the extension not available */

*major = *minor = 0;

/* Allow environment override */

env = getenv("SDL_VIDEO_X11_XINERAMA");

if (env && !SDL_atoi(env)) {

return SDL_FALSE;

}

if (!SDL_X11_HAVE_XINERAMA) {

return SDL_FALSE;

}

/* Query the extension version */

if (!XineramaQueryExtension(display, &event_base, &error_base) ||

!XineramaQueryVersion(display, major, minor) ||

!XineramaIsActive(display)) {

return SDL_FALSE;

}

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 */

env = getenv("SDL_VIDEO_X11_XRANDR");

if (env && !SDL_atoi(env)) {

return SDL_FALSE;

}

if (!SDL_X11_HAVE_XRANDR) {

return SDL_FALSE;

}

/* Query the extension version */

if (!XRRQueryVersion(display, major, minor)) {

return SDL_FALSE;

}

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 */

env = getenv("SDL_VIDEO_X11_XVIDMODE");

if (env && !SDL_atoi(env)) {

return SDL_FALSE;

}

if (!SDL_X11_HAVE_XVIDMODE) {

return SDL_FALSE;

}

/* Query the extension version */

vm_error = -1;

if (!XF86VidModeQueryExtension(display, &vm_event, &vm_error)

|| !XF86VidModeQueryVersion(display, major, minor)) {

return SDL_FALSE;

}

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;

data->use_xrandr = 0;

data->use_vidmode = 0;

screen_w = DisplayWidth(display, data->screen);

screen_h = DisplayHeight(display, data->screen);

#if SDL_VIDEO_DRIVER_X11_XINERAMA

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;

mode.refresh_rate = 0;

SDL_AddDisplayMode(sdl_display, &mode);

}

/* 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);

}

#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_XINERAMA

if (data->use_xinerama) {

*w = data->xinerama_info.width;

*h = data->xinerama_info.height;

*rate = 0;

return;

}

#endif /* SDL_VIDEO_DRIVER_X11_XINERAMA */

#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 */

*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);

#if SDL_VIDEO_DRIVER_X11_XINERAMA

if (w == real_w && h == real_h && (data->use_xinerama || !rate || rate == real_rate)) {

return;

}

#else

if (w == real_w && h == real_h && (!rate || rate == real_rate)) {

return;

}

#endif

#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)

{

}

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

if (_this->windows) {

rect->x = 0;

rect->y = 0;

rect->w = _this->windows->w;

rect->h = _this->windows->h;

return 0;

}

return -1;

}

#endif /* SDL_VIDEO_DRIVER_X11 */

/* vi: set ts=4 sw=4 expandtab: */