mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-25 03:01:03 +00:00
110 lines
3.5 KiB
C
110 lines
3.5 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., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "../gstgleffects.h"
|
|
#include "gstgleffectscurves.h"
|
|
|
|
static void
|
|
gst_gl_effects_rgb_to_curve (GstGLEffects * effects,
|
|
const GstGLEffectsCurve * curve,
|
|
gint curve_index, gint width, gint height, GLuint texture)
|
|
{
|
|
GstGLShader *shader;
|
|
GstGLFilter *filter = GST_GL_FILTER (effects);
|
|
GstGLContext *context = filter->context;
|
|
GstGLFuncs *gl = context->gl_vtable;
|
|
|
|
shader = g_hash_table_lookup (effects->shaderstable, "rgbmap0");
|
|
|
|
if (!shader) {
|
|
shader = gst_gl_shader_new (context);
|
|
g_hash_table_insert (effects->shaderstable, (gchar *) "rgbmap0", shader);
|
|
}
|
|
|
|
if (!gst_gl_shader_compile_and_check (shader,
|
|
rgb_to_curve_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
|
|
gst_gl_context_set_error (context,
|
|
"Failed to initialize rgb to curve shader");
|
|
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
|
|
("%s", gst_gl_context_get_error ()), (NULL));
|
|
return;
|
|
}
|
|
|
|
gl->MatrixMode (GL_PROJECTION);
|
|
gl->LoadIdentity ();
|
|
|
|
gst_gl_shader_use (shader);
|
|
|
|
if (effects->curve[curve_index] == 0) {
|
|
/* this parameters are needed to have a right, predictable, mapping */
|
|
gl->GenTextures (1, &effects->curve[curve_index]);
|
|
gl->Enable (GL_TEXTURE_1D);
|
|
gl->BindTexture (GL_TEXTURE_1D, effects->curve[curve_index]);
|
|
gl->TexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
|
|
gl->TexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
|
|
gl->TexParameteri (GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP);
|
|
gl->TexParameteri (GL_TEXTURE_1D, GL_TEXTURE_WRAP_T, GL_CLAMP);
|
|
|
|
gl->TexImage1D (GL_TEXTURE_1D, 0, curve->bytes_per_pixel,
|
|
curve->width, 0, GL_RGB, GL_UNSIGNED_BYTE, curve->pixel_data);
|
|
|
|
gl->Disable (GL_TEXTURE_1D);
|
|
}
|
|
|
|
gl->ActiveTexture (GL_TEXTURE0);
|
|
gl->Enable (GL_TEXTURE_2D);
|
|
gl->BindTexture (GL_TEXTURE_2D, texture);
|
|
|
|
gst_gl_shader_set_uniform_1i (shader, "tex", 0);
|
|
|
|
gl->Disable (GL_TEXTURE_2D);
|
|
|
|
gl->ActiveTexture (GL_TEXTURE1);
|
|
gl->Enable (GL_TEXTURE_1D);
|
|
gl->BindTexture (GL_TEXTURE_1D, effects->curve[curve_index]);
|
|
|
|
gst_gl_shader_set_uniform_1i (shader, "curve", 1);
|
|
|
|
gl->Disable (GL_TEXTURE_1D);
|
|
|
|
gst_gl_filter_draw_texture (filter, texture, width, height);
|
|
}
|
|
|
|
static void
|
|
gst_gl_effects_xpro_callback (gint width, gint height, guint texture,
|
|
gpointer data)
|
|
{
|
|
GstGLEffects *effects = GST_GL_EFFECTS (data);
|
|
|
|
gst_gl_effects_rgb_to_curve (effects, &xpro_curve, GST_GL_EFFECTS_CURVE_XPRO,
|
|
width, height, texture);
|
|
}
|
|
|
|
void
|
|
gst_gl_effects_xpro (GstGLEffects * effects)
|
|
{
|
|
GstGLFilter *filter = GST_GL_FILTER (effects);
|
|
|
|
gst_gl_filter_render_to_target (filter, TRUE, effects->intexture,
|
|
effects->outtexture, gst_gl_effects_xpro_callback, effects);
|
|
}
|