1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/*
* GStreamer
* Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@gmail.com>
* Copyright (C) 2015 Michał Dębski <debski.mi.zd@gmail.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "../gstgleffects.h"
static float *
gst_gl_effects_blur_kernel (void)
{
/* gaussian kernel (well, actually vector), size 9, standard
* deviation 3.0 */
/* FIXME: make this a runtime property */
static gfloat *kernel = NULL;
if (G_UNLIKELY (NULL == kernel)) {
/* 3x3 matrix */
kernel = g_malloc (sizeof (gfloat) * 9);
fill_gaussian_kernel (kernel, 7, 3.f);
}
return kernel;
}
static void
gst_gl_effects_blur_callback_hconv (gint width, gint height, guint texture,
gpointer data)
{
GstGLShader *shader = NULL;
GstGLEffects *effects = GST_GL_EFFECTS (data);
if (NULL != (shader = gst_gl_effects_get_fragment_shader (effects, "hconv0",
hconv7_fragment_source_gles2, hconv7_fragment_source_opengl))) {
GstGLFilter *filter = GST_GL_FILTER (effects);
GstGLFuncs *gl = GST_GL_BASE_FILTER (filter)->context->gl_vtable;
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (GST_GL_BASE_FILTER (filter)->context)) {
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
}
#endif
gst_gl_shader_use (shader);
gl->ActiveTexture (GL_TEXTURE0);
gl->Enable (GL_TEXTURE_2D);
gl->BindTexture (GL_TEXTURE_2D, texture);
gl->Disable (GL_TEXTURE_2D);
gst_gl_shader_set_uniform_1i (shader, "tex", 0);
gst_gl_shader_set_uniform_1f (shader, "gauss_width", width);
gst_gl_shader_set_uniform_1fv (shader, "kernel", 7,
gst_gl_effects_blur_kernel ());
gst_gl_filter_draw_texture (filter, texture, width, height);
}
}
static void
gst_gl_effects_blur_callback_vconv (gint width, gint height, guint texture,
gpointer data)
{
GstGLShader *shader = NULL;
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLFilter *filter = GST_GL_FILTER (effects);
if (NULL != (shader = gst_gl_effects_get_fragment_shader (effects, "vconv0",
vconv7_fragment_source_gles2, vconv7_fragment_source_opengl))) {
GstGLFuncs *gl = GST_GL_BASE_FILTER (filter)->context->gl_vtable;
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (GST_GL_BASE_FILTER (filter)->context)) {
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
}
#endif
gst_gl_shader_use (shader);
gl->ActiveTexture (GL_TEXTURE0);
gl->Enable (GL_TEXTURE_2D);
gl->BindTexture (GL_TEXTURE_2D, texture);
gl->Disable (GL_TEXTURE_2D);
gst_gl_shader_set_uniform_1i (shader, "tex", 0);
gst_gl_shader_set_uniform_1f (shader, "gauss_height", height);
gst_gl_shader_set_uniform_1fv (shader, "kernel", 7,
gst_gl_effects_blur_kernel ());
gst_gl_filter_draw_texture (filter, texture, width, height);
}
}
void
gst_gl_effects_blur (GstGLEffects * effects)
{
GstGLFilter *filter = GST_GL_FILTER (effects);
gst_gl_filter_render_to_target (filter, TRUE, effects->intexture,
effects->midtexture[0], gst_gl_effects_blur_callback_hconv, effects);
gst_gl_filter_render_to_target (filter, FALSE, effects->midtexture[0],
effects->outtexture, gst_gl_effects_blur_callback_vconv, effects);
}
|
