mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-28 12:41:05 +00:00
98 lines
3.2 KiB
C
98 lines
3.2 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) {
|
|
GstGLFilter *filter = GST_GL_FILTER (effects);
|
|
gst_gl_display_set_error (filter->display,
|
|
"Failed to initialize squeeze shader, %s", error->message);
|
|
g_error_free (error);
|
|
error = NULL;
|
|
gst_gl_shader_use (NULL);
|
|
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
|
|
GST_GL_DISPLAY_ERR_MSG (GST_GL_FILTER (effects)->display), (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
|
|
if (!gst_gl_shader_compile_and_check (shader,
|
|
squeeze_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
|
|
gst_gl_display_set_error (GST_GL_FILTER (effects)->display,
|
|
"Failed to initialize squeeze shader");
|
|
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
|
|
GST_GL_DISPLAY_ERR_MSG (GST_GL_FILTER (effects)->display), (NULL));
|
|
return;
|
|
}
|
|
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);
|
|
}
|