mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2025-02-03 04:52:28 +00:00
Code Issues 1 Projects Releases Wiki Activity

geometrictransform: make tunnel "radius" customizable

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=625908
This commit is contained in:
Filippo Argiolas 2010-08-05 12:43:15 +02:00 committed by Sebastian Dröge
parent 1652a3ef57
commit 7be30c3daf
1 changed files with 5 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
gst/geometrictransform/gsttunnel.c
View file

@ -96,14 +96,13 @@ tunnel_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x,
norm_x = 2.0 * (x - cgt->x_center * width) / MAX (width, height); norm_x = 2.0 * (x - cgt->x_center * width) / MAX (width, height);
norm_y = 2.0 * (y - cgt->y_center * height) / MAX (width, height); norm_y = 2.0 * (y - cgt->y_center * height) / MAX (width, height);
r = sqrt (norm_x * norm_x + norm_y * norm_y); /* calculate radius, normalize to 1 for future convenience */
r = sqrt (0.5 * (norm_x * norm_x + norm_y * norm_y));
/* do nothing if r < 0.5 */ /* do nothing if r < radius */
/* zoom otherwise */ /* zoom otherwise */
/* the second edge is the tunnel radius, see gststretch.c for norm_x *= CLAMP (r, 0.0, cgt->radius) / r;
* comments about its customizability */ norm_y *= CLAMP (r, 0.0, cgt->radius) / r;
norm_x *= CLAMP (r, 0.0, 0.5) / r;
norm_y *= CLAMP (r, 0.0, 0.5) / r;
/* unnormalize */ /* unnormalize */
*in_x = 0.5 * (norm_x) * MAX (width, height) + cgt->x_center * width; *in_x = 0.5 * (norm_x) * MAX (width, height) + cgt->x_center * width;