Implement animations

Squashed all the stuff:

init

Update README.md

options

performance

Animation no longer jumps if started in the middle of an animation

Doubled default transition length

Minor bugfix, preformance

Track x and y separately to aviod jumping in mid-animation repositioning

Added video to readme

docs

docs

fixed graphical glitch with non-transparent windows

now animates window scaling too (but only if the window grows)

added options for size transitions

and actually respect the new options..

and actually respect the new options..

added center-spawn option

added center-spawn-screen option

fixed center spawn

added no-scale-down

goofed

remember old windows

remember old windows

docs

fixed shadow

fixed shadow

fixed shadow

fixed shadow

lost no-scale-down due to revert

lost spawn-center due to revert

Fixed #2

fix missing window borders

src/config.h

@@ -87,6 +87,24 @@ typedef struct options {
 	bool glx_no_stencil;
 	/// Whether to avoid rebinding pixmap on window damage.
 	bool glx_no_rebind_pixmap;
+	/// Length of window transitions
+	int transition_length;
+	/// For smoothing on the x-coordinate of window animations
+	float transition_pow_x;
+	/// For smoothing on the y-coordinate of window animations
+	float transition_pow_y;
+	/// For smoothing on the width of window animations
+	float transition_pow_w;
+	/// For smoothing on the height of window animations
+	float transition_pow_h;
+	/// Wether to animate on window size change
+	bool size_transition;
+	/// Wether to scale new windows in from the center of the screen
+	bool spawn_center_screen;
+	/// Wether to scale new windows in from their center
+	bool spawn_center;
+	/// Does not animate downscaling
+	bool no_scale_down;
 	/// Custom fragment shader for painting windows, as a string.
 	char *glx_fshader_win_str;
 	/// Whether to detect rounded corners.