1 /*
2 * GStreamer
3 * Copyright (C) 2008-2010 Filippo Argiolas <filippo.argiolas@gmail.com>
4 * Copyright (C) 2015 Michał Dębski <debski.mi.zd@gmail.com>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22 #ifdef HAVE_CONFIG_H
23 #include "config.h"
24 #endif
25
26 #include "../gstgleffects.h"
27
28 void
gst_gl_effects_sobel(GstGLEffects * effects)29 gst_gl_effects_sobel (GstGLEffects * effects)
30 {
31 GstGLFilter *filter = GST_GL_FILTER (effects);
32 GstGLShader *shader;
33
34 shader = gst_gl_effects_get_fragment_shader (effects, "desat0",
35 desaturate_fragment_source_gles2);
36 gst_gl_filter_render_to_target_with_shader (filter, effects->intexture,
37 effects->midtexture[0], shader);
38
39 shader = gst_gl_effects_get_fragment_shader (effects, "hconv0",
40 sep_sobel_hconv3_fragment_source_gles2);
41 gst_gl_shader_use (shader);
42 gst_gl_shader_set_uniform_1f (shader, "height",
43 GST_VIDEO_INFO_HEIGHT (&filter->out_info));
44 gst_gl_filter_render_to_target_with_shader (filter, effects->midtexture[0],
45 effects->midtexture[1], shader);
46
47 shader = gst_gl_effects_get_fragment_shader (effects, "vconv0",
48 sep_sobel_vconv3_fragment_source_gles2);
49 gst_gl_shader_use (shader);
50 gst_gl_shader_set_uniform_1f (shader, "width",
51 GST_VIDEO_INFO_WIDTH (&filter->out_info));
52 gst_gl_filter_render_to_target_with_shader (filter, effects->midtexture[1],
53 effects->midtexture[0], shader);
54
55 shader = gst_gl_effects_get_fragment_shader (effects, "len0",
56 sep_sobel_length_fragment_source_gles2);
57 gst_gl_shader_use (shader);
58 gst_gl_shader_set_uniform_1i (shader, "invert", effects->invert);
59 gst_gl_filter_render_to_target_with_shader (filter, effects->midtexture[0],
60 effects->outtexture, shader);
61 }
62