/*

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

/* I'm becoming more and more convinced that the application should never use XRandR,

* and it's the window manager's responsibility to track and manage display modes for

* fullscreen windows. Right now XRandR is completely broken with respect to window

* manager behavior on every window manager that I can find. For example, on Unity 3D

* if you show a fullscreen window while the resolution is changing (within ~250 ms)

* your window will retain the fullscreen state hint but be decorated and windowed.

*/

#define XRANDR_DISABLED_BY_DEFAULT

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;

}

/* 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 */

return SDL_FALSE;

}

if (!SDL_X11_HAVE_XINERAMA) {

#ifdef X11MODES_DEBUG

printf("Xinerama support not available\n");

#endif

return SDL_FALSE;

}

/* Query the extension version */

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

!XineramaQueryVersion(display, major, minor) ||

#ifdef X11MODES_DEBUG

printf("Xinerama not active on the display\n");

#endif

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 */

#ifdef XRANDR_DISABLED_BY_DEFAULT

if (!env || !SDL_atoi(env)) {

#ifdef X11MODES_DEBUG

printf("XRandR disabled by default due to window manager issues\n");

#endif

return SDL_FALSE;

}

#else

return SDL_FALSE;

}

if (!SDL_X11_HAVE_XRANDR) {

#ifdef X11MODES_DEBUG

printf("XRandR support not available\n");

#endif

return SDL_FALSE;

}

/* Query the extension version */

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

#ifdef X11MODES_DEBUG

printf("XRandR not active on the display\n");

#endif

return SDL_FALSE;

}

return SDL_TRUE;

}

#define XRANDR_ROTATION_LEFT (1 << 1)

#define XRANDR_ROTATION_RIGHT (1 << 3)

static int

CalculateXRandRRefreshRate(const XRRModeInfo *info)

}

static SDL_bool

SetXRandRModeInfo(Display *display, XRRScreenResources *res, XRROutputInfo *output_info,

RRMode modeID, SDL_DisplayMode *mode)

{

int i;

for (i = 0; i < res->nmode; ++i) {

if (res->modes[i].id == modeID) {

XRRCrtcInfo *crtc;

Rotation rotation = 0;

const XRRModeInfo *info = &res->modes[i];

crtc = XRRGetCrtcInfo(display, res, output_info->crtc);

if (crtc) {

rotation = crtc->rotation;

XRRFreeCrtcInfo(crtc);

}

if (rotation & (XRANDR_ROTATION_LEFT|XRANDR_ROTATION_RIGHT)) {

mode->w = info->height;

mode->h = info->width;

} else {

mode->w = info->width;

mode->h = info->height;

}

mode->refresh_rate = CalculateXRandRRefreshRate(info);

((SDL_DisplayModeData*)mode->driverdata)->xrandr_mode = modeID;

#ifdef X11MODES_DEBUG

printf("XRandR mode %d: %dx%d@%dHz\n", modeID, mode->w, mode->h, mode->refresh_rate);

#endif

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 */

return SDL_FALSE;

}

if (!SDL_X11_HAVE_XVIDMODE) {

#ifdef X11MODES_DEBUG

printf("XVidMode support not available\n");

#endif

return SDL_FALSE;

}

/* Query the extension version */

vm_error = -1;

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

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

#ifdef X11MODES_DEBUG

printf("XVidMode not active on the display\n");

#endif

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

{

return (info->htotal

&& info->vtotal) ? (1000 * info->dotclock / (info->htotal *

info->vtotal)) : 0;

}

SDL_bool

SetXVidModeModeInfo(const XF86VidModeModeInfo *info, SDL_DisplayMode *mode)

mode->w = info->hdisplay;

mode->h = info->vdisplay;

mode->refresh_rate = CalculateXVidModeRefreshRate(info);

((SDL_DisplayModeData*)mode->driverdata)->vm_mode = *info;

return SDL_TRUE;

int

X11_InitModes(_THIS)

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

int screen, screencount;

#if SDL_VIDEO_DRIVER_X11_XINERAMA

int xinerama_major, xinerama_minor;

int use_xinerama = 0;

XineramaScreenInfo *xinerama = NULL;

#endif

#if SDL_VIDEO_DRIVER_X11_XRANDR

int xrandr_major, xrandr_minor;

int use_xrandr = 0;

XRRScreenResources *res = NULL;

#endif

#if SDL_VIDEO_DRIVER_X11_XVIDMODE

int vm_major, vm_minor;

int use_vidmode = 0;

#endif

#if SDL_VIDEO_DRIVER_X11_XINERAMA

/* 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) {

use_xinerama = xinerama_major * 100 + xinerama_minor;

}

}

if (!xinerama) {

screencount = ScreenCount(data->display);

#else

screencount = ScreenCount(data->display);

#endif /* SDL_VIDEO_DRIVER_X11_XINERAMA */

#if SDL_VIDEO_DRIVER_X11_XRANDR

/* require at least XRandR v1.2 */

if (CheckXRandR(data->display, &xrandr_major, &xrandr_minor) &&

(xrandr_major >= 2 || (xrandr_major == 1 && xrandr_minor >= 2))) {

use_xrandr = xrandr_major * 100 + xrandr_minor;

}

#endif /* SDL_VIDEO_DRIVER_X11_XRANDR */

#if SDL_VIDEO_DRIVER_X11_XVIDMODE

if (CheckVidMode(data->display, &vm_major, &vm_minor)) {

use_vidmode = vm_major * 100 + vm_minor;

}

#endif /* SDL_VIDEO_DRIVER_X11_XVIDMODE */

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

XVisualInfo vinfo;

SDL_VideoDisplay display;

SDL_DisplayData *displaydata;

SDL_DisplayMode mode;

SDL_DisplayModeData *modedata;

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;

}

#endif

displaydata = (SDL_DisplayData *) SDL_calloc(1, sizeof(*displaydata));

if (!displaydata) {

continue;

}

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

if (SDL_ISPIXELFORMAT_INDEXED(mode.format)) {

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

SDL_free(displaydata);

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);

#endif

mode.refresh_rate = 0;

modedata = (SDL_DisplayModeData *) SDL_calloc(1, sizeof(SDL_DisplayModeData));

if (!modedata) {

SDL_free(displaydata);

continue;

}

mode.driverdata = modedata;

#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 (use_xinerama) {

displaydata->screen = 0;

displaydata->use_xinerama = use_xinerama;

displaydata->xinerama_info = xinerama[screen];

displaydata->xinerama_screen = screen;

}

else displaydata->screen = screen;

#else

displaydata->screen = screen;

#endif

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);

}

#if SDL_VIDEO_DRIVER_X11_XINERAMA

if (use_xinerama) {

displaydata->x = xinerama[screen].x_org;

displaydata->y = xinerama[screen].y_org;

}

else

#endif

{

displaydata->x = 0;

displaydata->y = 0;

}

#if SDL_VIDEO_DRIVER_X11_XRANDR

if (use_xrandr) {

res = XRRGetScreenResources(data->display, RootWindow(data->display, displaydata->screen));

}

if (res) {

XRROutputInfo *output_info;

XRRCrtcInfo *crtc;

int output;

for (output = 0; output < res->noutput; output++) {

output_info = XRRGetOutputInfo(data->display, res, res->outputs[output]);

if (!output_info || !output_info->crtc ||

output_info->connection == RR_Disconnected) {

XRRFreeOutputInfo(output_info);

continue;

}

/* Is this the output that corresponds to the current screen?

We're checking the crtc position, but that may not be a valid test

in all cases. Anybody want to give this some love?

*/

crtc = XRRGetCrtcInfo(data->display, res, output_info->crtc);

if (!crtc || crtc->x != displaydata->x || crtc->y != displaydata->y) {

XRRFreeOutputInfo(output_info);

XRRFreeCrtcInfo(crtc);

continue;

}

displaydata->use_xrandr = use_xrandr;

displaydata->xrandr_output = res->outputs[output];

SetXRandRModeInfo(data->display, res, output_info, crtc->mode, &mode);

XRRFreeOutputInfo(output_info);

XRRFreeCrtcInfo(crtc);

break;

}

#ifdef X11MODES_DEBUG

if (output == res->noutput) {

printf("Couldn't find XRandR CRTC at %d,%d\n", displaydata->x, displaydata->y);

}

#endif

XRRFreeScreenResources(res);

}

#endif /* SDL_VIDEO_DRIVER_X11_XRANDR */

#if SDL_VIDEO_DRIVER_X11_XVIDMODE

if (!displaydata->use_xrandr &&

#if SDL_VIDEO_DRIVER_X11_XINERAMA

(!displaydata->use_xinerama || displaydata->xinerama_info.screen_number == 0) &&

#endif

use_vidmode) {

displaydata->use_vidmode = use_vidmode;

XF86VidModeGetModeInfo(data->display, screen, &modedata->vm_mode);

}

#endif /* SDL_VIDEO_DRIVER_X11_XVIDMODE */

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;

}

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_XVIDMODE

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

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;

modedata = (SDL_DisplayModeData *) SDL_calloc(1, sizeof(SDL_DisplayModeData));

if (modedata) {

*modedata = *(SDL_DisplayModeData *)sdl_display->desktop_mode.driverdata;

}

mode.driverdata = modedata;

SDL_AddDisplayMode(sdl_display, &mode);

}

}

#endif /* SDL_VIDEO_DRIVER_X11_XINERAMA */

#if SDL_VIDEO_DRIVER_X11_XRANDR

if (data->use_xrandr) {

XRRScreenResources *res;

res = XRRGetScreenResources (display, RootWindow(display, data->screen));

if (res) {

SDL_DisplayModeData *modedata;

XRROutputInfo *output_info;

int i;

output_info = XRRGetOutputInfo(display, res, data->xrandr_output);

if (output_info && output_info->connection != RR_Disconnected) {

for (i = 0; i < output_info->nmode; ++i) {

modedata = (SDL_DisplayModeData *) SDL_calloc(1, sizeof(SDL_DisplayModeData));

if (!modedata) {

continue;

}

mode.driverdata = modedata;

if (SetXRandRModeInfo(display, res, output_info, output_info->modes[i], &mode)) {

SDL_AddDisplayMode(sdl_display, &mode);

} else {

SDL_free(modedata);

}

}

}

XRRFreeOutputInfo(output_info);

XRRFreeScreenResources(res);

}

#endif /* SDL_VIDEO_DRIVER_X11_XRANDR */

#if SDL_VIDEO_DRIVER_X11_XVIDMODE

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,

}

#endif

for (i = 0; i < nmodes; ++i) {

modedata = (SDL_DisplayModeData *) SDL_calloc(1, sizeof(SDL_DisplayModeData));

if (!modedata) {

continue;

}

mode.driverdata = modedata;

if (SetXVidModeModeInfo(modes[i], &mode)) {

SDL_AddDisplayMode(sdl_display, &mode);

} else {

SDL_free(modedata);

}

}

XFree(modes);

}

#endif /* SDL_VIDEO_DRIVER_X11_XVIDMODE */

if (!data->use_xrandr && !data->use_vidmode) {

/* Add the desktop mode */

mode = sdl_display->desktop_mode;

modedata = (SDL_DisplayModeData *) SDL_calloc(1, sizeof(SDL_DisplayModeData));

if (modedata) {

*modedata = *(SDL_DisplayModeData *)sdl_display->desktop_mode.driverdata;

}

mode.driverdata = modedata;

SDL_AddDisplayMode(sdl_display, &mode);

}

}

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;

SDL_DisplayModeData *modedata = (SDL_DisplayModeData *)mode->driverdata;

#if SDL_VIDEO_DRIVER_X11_XRANDR

if (data->use_xrandr) {

XRRScreenResources *res;

XRROutputInfo *output_info;

XRRCrtcInfo *crtc;

Status status;

res = XRRGetScreenResources (display, RootWindow(display, data->screen));

if (!res) {

SDL_SetError("Couldn't get XRandR screen resources");

return -1;

}

output_info = XRRGetOutputInfo(display, res, data->xrandr_output);

if (!output_info || output_info->connection == RR_Disconnected) {

SDL_SetError("Couldn't get XRandR output info");

XRRFreeScreenResources(res);

return -1;

}

crtc = XRRGetCrtcInfo(display, res, output_info->crtc);

if (!crtc) {

SDL_SetError("Couldn't get XRandR crtc info");

XRRFreeOutputInfo(output_info);

XRRFreeScreenResources(res);

return -1;

}

status = XRRSetCrtcConfig (display, res, output_info->crtc, CurrentTime,

crtc->x, crtc->y, modedata->xrandr_mode, crtc->rotation,

&data->xrandr_output, 1);

XRRFreeCrtcInfo(crtc);

XRRFreeOutputInfo(output_info);

XRRFreeScreenResources(res);

if (status != Success) {

SDL_SetError("XRRSetCrtcConfig failed");

return -1;

}

}

#endif /* SDL_VIDEO_DRIVER_X11_XRANDR */

#if SDL_VIDEO_DRIVER_X11_XVIDMODE

if (data->use_vidmode) {

}

#endif /* SDL_VIDEO_DRIVER_X11_XVIDMODE */

return 0;

}

void

X11_QuitModes(_THIS)

{

}

int

X11_GetDisplayBounds(_THIS, SDL_VideoDisplay * sdl_display, SDL_Rect * rect)

{

rect->x = data->x;

rect->y = data->y;

rect->w = sdl_display->current_mode.w;

rect->h = sdl_display->current_mode.h;

#if SDL_VIDEO_DRIVER_X11_XINERAMA

int screencount;

XineramaScreenInfo *xinerama = XineramaQueryScreens(display, &screencount);

if (xinerama) {

rect->x = xinerama[data->xinerama_screen].x_org;

rect->y = xinerama[data->xinerama_screen].y_org;

}

}

#endif /* SDL_VIDEO_DRIVER_X11 */

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