1 /*
2 * GStreamer
3 * Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@gmail.com>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20 #ifdef HAVE_CONFIG_H
21 #include "config.h"
22 #endif
23
24 #include "../gstgleffects.h"
25 #include "gstgleffectscurves.h"
26
27 static void
gst_gl_effects_rgb_to_curve(GstGLEffects * effects,const GstGLEffectsCurve * curve,gint curve_index,GstGLMemory * in_tex,GstGLMemory * out_tex)28 gst_gl_effects_rgb_to_curve (GstGLEffects * effects,
29 const GstGLEffectsCurve * curve, gint curve_index, GstGLMemory * in_tex,
30 GstGLMemory * out_tex)
31 {
32 GstGLContext *context = GST_GL_BASE_FILTER (effects)->context;
33 GstGLFilter *filter = GST_GL_FILTER (effects);
34 const GstGLFuncs *gl = context->gl_vtable;
35 GstGLShader *shader;
36
37 shader = gst_gl_effects_get_fragment_shader (effects, "rgb_to_curve",
38 rgb_to_curve_fragment_source_gles2);
39
40 if (!shader)
41 return;
42
43 #if GST_GL_HAVE_OPENGL
44 if (USING_OPENGL (context)) {
45 gl->MatrixMode (GL_PROJECTION);
46 gl->LoadIdentity ();
47 }
48 #endif
49
50 if (effects->curve[curve_index] == 0) {
51 /* this parameters are needed to have a right, predictable, mapping */
52 gl->GenTextures (1, &effects->curve[curve_index]);
53
54 gl->BindTexture (GL_TEXTURE_2D, effects->curve[curve_index]);
55 gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
56 gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
57 gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
58 gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
59
60 gl->TexImage2D (GL_TEXTURE_2D, 0, GL_RGB,
61 curve->width, 1, 0, GL_RGB, GL_UNSIGNED_BYTE, curve->pixel_data);
62 }
63
64 gst_gl_shader_use (shader);
65 gl->ActiveTexture (GL_TEXTURE2);
66 gl->BindTexture (GL_TEXTURE_2D, effects->curve[curve_index]);
67
68 gst_gl_shader_set_uniform_1i (shader, "curve", 2);
69
70 gst_gl_filter_render_to_target_with_shader (filter, in_tex, out_tex, shader);
71 }
72
73 void
gst_gl_effects_xpro(GstGLEffects * effects)74 gst_gl_effects_xpro (GstGLEffects * effects)
75 {
76 gst_gl_effects_rgb_to_curve (effects, &xpro_curve, GST_GL_EFFECTS_CURVE_XPRO,
77 effects->intexture, effects->outtexture);
78 }
79