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
|
/*
* GStreamer
* Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@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"
#define USING_OPENGL(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_OPENGL)
#define USING_OPENGL3(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_OPENGL3)
#define USING_GLES(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_GLES)
#define USING_GLES2(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_GLES2)
#define USING_GLES3(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_GLES3)
static void
gst_gl_effects_mirror_callback (gint width, gint height, guint texture,
gpointer data)
{
GstGLShader *shader;
GstGLFilter *filter = GST_GL_FILTER (data);
GstGLEffects *effects = GST_GL_EFFECTS (filter);
GstGLContext *context = filter->context;
GstGLFuncs *gl = context->gl_vtable;
shader = g_hash_table_lookup (effects->shaderstable, "mirror0");
if (!shader) {
shader = gst_gl_shader_new (context);
g_hash_table_insert (effects->shaderstable, "mirror0", shader);
#if GST_GL_HAVE_GLES2
if (USING_GLES2 (context)) {
if (shader) {
GError *error = NULL;
gst_gl_shader_set_vertex_source (shader, vertex_shader_source);
gst_gl_shader_set_fragment_source (shader,
mirror_fragment_source_gles2);
gst_gl_shader_compile (shader, &error);
if (error) {
gst_gl_context_set_error (context,
"Failed to initialize mirror shader, %s", error->message);
g_error_free (error);
error = NULL;
gst_gl_shader_use (NULL);
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
("%s", gst_gl_context_get_error ()), (NULL));
} else {
effects->draw_attr_position_loc =
gst_gl_shader_get_attribute_location (shader, "a_position");
effects->draw_attr_texture_loc =
gst_gl_shader_get_attribute_location (shader, "a_texCoord");
}
}
}
#endif
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (context)) {
if (!gst_gl_shader_compile_and_check (shader,
mirror_fragment_source_opengl, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_context_set_error (context,
"Failed to initialize mirror shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
("%s", gst_gl_context_get_error ()), (NULL));
return;
}
}
#endif
}
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (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);
gst_gl_shader_set_uniform_1i (shader, "tex", 0);
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (filter->context)) {
gst_gl_shader_set_uniform_1f (shader, "width", (gfloat) width / 2.0f);
gst_gl_shader_set_uniform_1f (shader, "height", (gfloat) height / 2.0f);
}
#endif
gst_gl_effects_draw_texture (effects, texture, width, height);
}
void
gst_gl_effects_mirror (GstGLEffects * effects)
{
GstGLFilter *filter = GST_GL_FILTER (effects);
gst_gl_filter_render_to_target (filter, TRUE, effects->intexture,
effects->outtexture, gst_gl_effects_mirror_callback, effects);
}
|
