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/* Copyright ©2008-2010 Kris Maglione <maglione.k at Gmail>
* See LICENSE file for license details.
*/
#define _X11_VISIBLE
#include "dat.h"
#include <X11/extensions/Xrender.h>
#include <X11/extensions/Xinerama.h>
#include "fns.h"
#if RANDR_MAJOR < 1
# error XRandR versions less than 1.0 are not supported
#endif
static void randr_screenchange(XRRScreenChangeNotifyEvent*);
static bool randr_event_p(XEvent *e);
static void randr_init(void);
static void render_init(void);
static void xinerama_init(void);
typedef void (*EvHandler)(XEvent*);
static EvHandler randr_handlers[RRNumberEvents];
bool have_RandR;
bool have_render;
bool have_xinerama;
int randr_eventbase;
static void
handle(XEvent *e, EvHandler h[], int base) {
if(h[e->type-base])
h[e->type-base](e);
}
void
xext_init(void) {
randr_init();
render_init();
xinerama_init();
}
void
xext_event(XEvent *e) {
if(randr_event_p(e))
handle(e, randr_handlers, randr_eventbase);
}
static void
randr_init(void) {
int errorbase, major, minor;
have_RandR = XRRQueryExtension(display, &randr_eventbase, &errorbase);
if(have_RandR)
if(XRRQueryVersion(display, &major, &minor) && major < 1)
have_RandR = false;
if(have_RandR)
XRRSelectInput(display, scr.root.xid, RRScreenChangeNotifyMask);
}
static bool
randr_event_p(XEvent *e) {
return have_RandR
&& (uint)e->type - randr_eventbase < RRNumberEvents;
}
static void
randr_screenchange(XRRScreenChangeNotifyEvent *ev) {
XRRUpdateConfiguration((XEvent*)ev);
if(ev->rotation*90 % 180)
scr.rect = Rect(0, 0, ev->width, ev->height);
else
scr.rect = Rect(0, 0, ev->height, ev->width);
init_screens();
}
static EvHandler randr_handlers[] = {
[RRScreenChangeNotify] = (EvHandler)randr_screenchange,
};
/* Ripped most graciously from ecore_x. XRender documentation
* is sparse.
*/
static void
render_init(void) {
XVisualInfo *vip;
XVisualInfo vi;
int base, i, n;
have_render = XRenderQueryExtension(display, &base, &base);
if(!have_render)
return;
vi.class = TrueColor;
vi.depth = 32;
vi.screen = scr.screen;
vip = XGetVisualInfo(display, VisualClassMask
| VisualDepthMask
| VisualScreenMask,
&vi, &n);
for(i=0; i < n; i++)
if(render_argb_p(vip[i].visual)) {
render_visual = vip[i].visual;
scr.visual32 = render_visual;
break;
}
XFree(vip);
}
bool
render_argb_p(Visual *v) {
XRenderPictFormat *f;
if(!have_render)
return false;
f = XRenderFindVisualFormat(display, v);
return f
&& f->type == PictTypeDirect
&& f->direct.alphaMask;
}
static void
xinerama_init(void) {
int base;
have_xinerama = XineramaQueryExtension(display, &base, &base);
}
static bool
xinerama_active(void) {
return have_xinerama && XineramaIsActive(display);
}
Rectangle*
xinerama_screens(int *np) {
static Rectangle *rects;
XineramaScreenInfo *res;
int i, n;
if(!xinerama_active()) {
*np = 1;
return &scr.rect;
}
free(rects);
res = XineramaQueryScreens(display, &n);
rects = emalloc(n * sizeof *rects);
for(i=0; i < n; i++) {
rects[i].min.x = res[i].x_org;
rects[i].min.y = res[i].y_org;
rects[i].max.x = res[i].x_org + res[i].width;
rects[i].max.y = res[i].y_org + res[i].height;
}
XFree(res);
*np = n;
return rects;
}
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