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| author | Filippo Argiolas <filippo.argiolas@gmail.com> | 2010-08-05 12:29:16 +0200 |
|---|---|---|
| committer | Sebastian Dröge <sebastian.droege@collabora.co.uk> | 2010-08-09 19:25:53 +0200 |
| commit | 1652a3ef5710a18d77a3c28498f5d6f84c2aee05 (patch) | |
| tree | 0454d4a2fbeefaf212b802162da79b71d041687a /gst/geometrictransform | |
| parent | 27134c6e389e6c8ea426888deb4f0ce0558e386c (diff) | |
| download | gstreamer-plugins-bad-1652a3ef5710a18d77a3c28498f5d6f84c2aee05.tar.gz | |
geometrictransform: make bulge "radius" customizable
https://bugzilla.gnome.org/show_bug.cgi?id=625908
Diffstat (limited to 'gst/geometrictransform')
| -rw-r--r-- | gst/geometrictransform/gstbulge.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/gst/geometrictransform/gstbulge.c b/gst/geometrictransform/gstbulge.c index 13476e664..453e33b0f 100644 --- a/gst/geometrictransform/gstbulge.c +++ b/gst/geometrictransform/gstbulge.c @@ -95,16 +95,15 @@ bulge_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x, norm_x = 2.0 * (x / width - cgt->x_center); norm_y = 2.0 * (y / height - cgt->y_center); - 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)); /* maps r to r^2 in the step region */ /* interpolating from negative values limits the amount of zoom at * the center so the first edge could be used as intensity * parameter */ - /* the second edge is the bulge radius, see gststretch.c for - * comments about its customizability */ - norm_x *= smoothstep (-0.15, 0.6, r); - norm_y *= smoothstep (-0.15, 0.6, r); + norm_x *= smoothstep (-0.15, cgt->radius, r); + norm_y *= smoothstep (-0.15, cgt->radius, r); /* unnormalize */ *in_x = (0.5 * norm_x + cgt->x_center) * width; |