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a72b2f5849
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
84 lines
3 KiB
C
84 lines
3 KiB
C
/*
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* GStreamer
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* Copyright (C) 2010 Filippo Argiolas <filippo.argiolas@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Alternatively, the contents of this file may be used under the
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* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
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* which case the following provisions apply instead of the ones
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* mentioned above:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_BULGE_H__
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#define __GST_BULGE_H__
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#include <gst/gst.h>
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#include "gstcirclegeometrictransform.h"
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G_BEGIN_DECLS
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/* #defines don't like whitespacey bits */
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#define GST_TYPE_BULGE \
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(gst_bulge_get_type())
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#define GST_BULGE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BULGE,GstBulge))
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#define GST_BULGE_CAST(obj) \
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((GstBulge *)(obj))
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#define GST_BULGE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BULGE,GstBulgeClass))
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#define GST_IS_BULGE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BULGE))
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#define GST_IS_BULGE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BULGE))
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typedef struct _GstBulge GstBulge;
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typedef struct _GstBulgeClass GstBulgeClass;
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struct _GstBulge
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{
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GstCircleGeometricTransform element;
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gdouble zoom;
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};
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struct _GstBulgeClass
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{
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GstCircleGeometricTransformClass parent_class;
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};
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GType gst_bulge_get_type (void);
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gboolean gst_bulge_plugin_init (GstPlugin * plugin);
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G_END_DECLS
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#endif /* __GST_BULGE_H__ */
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