gstreamer/gst/geometrictransform/gstbulge.h
Filippo Argiolas a72b2f5849 geometrictransform: add a "zoom" parameter to bulge filter
Rework bulge mapping function to give more predictable results.
Now the bulge is done dividing by a scale factor that smoothsteps from
"zoom" at the center to 1.0 at "radius".

https://bugzilla.gnome.org/show_bug.cgi?id=625908
2010-08-09 19:25:54 +02:00

84 lines
3 KiB
C

/*
* GStreamer
* Copyright (C) 2010 Filippo Argiolas <filippo.argiolas@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Alternatively, the contents of this file may be used under the
* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
* which case the following provisions apply instead of the ones
* mentioned above:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_BULGE_H__
#define __GST_BULGE_H__
#include <gst/gst.h>
#include "gstcirclegeometrictransform.h"
G_BEGIN_DECLS
/* #defines don't like whitespacey bits */
#define GST_TYPE_BULGE \
(gst_bulge_get_type())
#define GST_BULGE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BULGE,GstBulge))
#define GST_BULGE_CAST(obj) \
((GstBulge *)(obj))
#define GST_BULGE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BULGE,GstBulgeClass))
#define GST_IS_BULGE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BULGE))
#define GST_IS_BULGE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BULGE))
typedef struct _GstBulge GstBulge;
typedef struct _GstBulgeClass GstBulgeClass;
struct _GstBulge
{
GstCircleGeometricTransform element;
gdouble zoom;
};
struct _GstBulgeClass
{
GstCircleGeometricTransformClass parent_class;
};
GType gst_bulge_get_type (void);
gboolean gst_bulge_plugin_init (GstPlugin * plugin);
G_END_DECLS
#endif /* __GST_BULGE_H__ */