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/*
* 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 = GST_GL_BASE_FILTER (filter)->context;
GstGLFuncs *gl = context->gl_vtable;
shader = gst_gl_effects_get_fragment_shader (effects, "rgb_to_curve",
rgb_to_curve_fragment_source_gles2);
if (!shader)
return;
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (context)) {
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
}
#endif
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]);
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (context)) {
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, GL_RGB,
curve->width, 0, GL_RGB, GL_UNSIGNED_BYTE, curve->pixel_data);
}
#endif
if (USING_GLES2 (context) || USING_OPENGL3 (context)) {
gl->BindTexture (GL_TEXTURE_2D, effects->curve[curve_index]);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
gl->TexImage2D (GL_TEXTURE_2D, 0, GL_RGB,
curve->width, 1, 0, GL_RGB, GL_UNSIGNED_BYTE, curve->pixel_data);
}
}
gl->ActiveTexture (GL_TEXTURE0);
gl->BindTexture (GL_TEXTURE_2D, texture);
gst_gl_shader_set_uniform_1i (shader, "tex", 0);
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (context)) {
gl->ActiveTexture (GL_TEXTURE1);
gl->BindTexture (GL_TEXTURE_1D, effects->curve[curve_index]);
gst_gl_shader_set_uniform_1i (shader, "curve", 1);
}
#endif
if (USING_GLES2 (context) || USING_OPENGL3 (context)) {
gl->ActiveTexture (GL_TEXTURE1);
gl->BindTexture (GL_TEXTURE_2D, effects->curve[curve_index]);
gst_gl_shader_set_uniform_1i (shader, "curve", 1);
}
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);
}
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