gstreamer/gst/gl/effects/gstgleffectsqueeze.c
Julien Isorce e002f92e6d [408/906] gleffects: start to make it compatible with OpenGL ES 2.0
For now only identity, mirror and squeeze effects are available.
Maybe some factorization is needed about compilation shader
before to put the other effects since only a copy/past is needed,
at least until effect number 9: heat.
The effects from 10:sepia to 15:glow require more work.
2014-03-15 18:36:38 +01:00

90 lines
2.7 KiB
C

/*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <gstgleffects.h>
static void
gst_gl_effects_squeeze_callback (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "squeeze0");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "squeeze0", shader);
#ifdef OPENGL_ES2
if (shader) {
GError *error = NULL;
gst_gl_shader_set_vertex_source (shader, vertex_shader_source);
gst_gl_shader_set_fragment_source (shader, squeeze_fragment_source);
gst_gl_shader_compile (shader, &error);
if (error) {
GST_ERROR ("%s", error->message);
g_error_free (error);
error = NULL;
gst_gl_shader_use (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
}
#ifndef OPENGL_ES2
g_return_if_fail (gst_gl_shader_compile_and_check (shader,
squeeze_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE));
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
#endif
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE0);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
gst_gl_shader_set_uniform_1i (shader, "tex", 0);
#ifndef OPENGL_ES2
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);
}
void
gst_gl_effects_squeeze (GstGLEffects * effects)
{
GstGLFilter *filter = GST_GL_FILTER (effects);
gst_gl_filter_render_to_target (filter, effects->intexture,
effects->outtexture, gst_gl_effects_squeeze_callback, effects);
}