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Use display refresh rate for animations #122

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5 changes: 4 additions & 1 deletion config.mk
Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,9 @@ X11LIB = /usr/X11R6/lib
XINERAMALIBS = -lXinerama
XINERAMAFLAGS = -DXINERAMA

# XRandR
XRANDRLIBS = -lXrandr

# freetype
FREETYPELIBS = -lfontconfig -lXft
FREETYPEINC = /usr/include/freetype2
Expand All @@ -23,7 +26,7 @@ FREETYPEINC = /usr/include/freetype2

# includes and libs
INCS = -I${X11INC} -I${FREETYPEINC}
LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS} ${FREETYPELIBS} -lm
LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS} ${XRANDRLIBS} ${FREETYPELIBS} -lm

# flags
CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_POSIX_C_SOURCE=200809L -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
Expand Down
11 changes: 10 additions & 1 deletion instantwm.c
Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@
#include <X11/X.h>
#include <X11/Xlib.h>
#include <X11/Xresource.h>
#include <X11/extensions/Xrandr.h>
#include <errno.h>
#include <locale.h>
#include <math.h>
Expand Down Expand Up @@ -448,11 +449,19 @@ void animateclient(Client *c, int x, int y, int w, int h, int frames,
width = w ? w : c->w;
height = h ? h : c->h;

XRRScreenConfiguration *conf = XRRGetScreenInfo(dpy, RootWindow(dpy, 0));
short refresh_rate = XRRConfigCurrentRate(conf);

// scale the framerate properly for !=60Hz displays
frames = frames * (refresh_rate / 60);
double usecs = (1 / (double)refresh_rate) * 1000000;

// halve frames if enough events are queried
frames = frames / 1 + (XEventsQueued(dpy, QueuedAlready) > 50);

// No animation if even more events are queried
if (!frames || XEventsQueued(dpy, QueuedAlready) > 100) {
usecs = 0;
if (resetpos)
resize(c, c->x, c->y, width, height, 0);
else
Expand Down Expand Up @@ -487,7 +496,7 @@ void animateclient(Client *c, int x, int y, int w, int h, int frames,
oldy + easeOutCubic(((double)time / frames)) * (y - oldy),
width, height, 1);
time++;
usleep(15000);
usleep(usecs);
}
}
}
Expand Down