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104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
/*
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* GStreamer
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* Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <gstgleffects.h>
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#include <gstgleffectscurves.h>
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static void
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gst_gl_effects_rgb_to_curve (GstGLEffects * effects,
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GstGLEffectsCurve curve,
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gint curve_index, gint width, gint height, GLuint texture)
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{
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GstGLShader *shader;
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shader = g_hash_table_lookup (effects->shaderstable, "rgbmap0");
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if (!shader) {
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shader = gst_gl_shader_new ();
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g_hash_table_insert (effects->shaderstable, "rgbmap0", shader);
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}
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if (!gst_gl_shader_compile_and_check (shader,
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rgb_to_curve_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
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gst_gl_display_set_error (GST_GL_FILTER (effects)->display,
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"Failed to initialize rgb to curve shader");
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GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
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GST_GL_DISPLAY_ERR_MSG (GST_GL_FILTER (effects)->display), (NULL));
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return;
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}
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glMatrixMode (GL_PROJECTION);
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glLoadIdentity ();
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gst_gl_shader_use (shader);
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if (effects->curve[curve_index] == 0) {
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/* this parameters are needed to have a right, predictable, mapping */
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glGenTextures (1, &effects->curve[curve_index]);
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glEnable (GL_TEXTURE_1D);
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glBindTexture (GL_TEXTURE_1D, effects->curve[curve_index]);
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glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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glTexImage1D (GL_TEXTURE_1D, 0, curve.bytes_per_pixel,
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curve.width, 0, GL_RGB, GL_UNSIGNED_BYTE, curve.pixel_data);
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glDisable (GL_TEXTURE_1D);
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}
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glActiveTexture (GL_TEXTURE0);
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glEnable (GL_TEXTURE_RECTANGLE_ARB);
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glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
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gst_gl_shader_set_uniform_1i (shader, "tex", 0);
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glDisable (GL_TEXTURE_RECTANGLE_ARB);
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glActiveTexture (GL_TEXTURE1);
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glEnable (GL_TEXTURE_1D);
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glBindTexture (GL_TEXTURE_1D, effects->curve[curve_index]);
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gst_gl_shader_set_uniform_1i (shader, "curve", 1);
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glDisable (GL_TEXTURE_1D);
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gst_gl_effects_draw_texture (effects, texture);
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}
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static void
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gst_gl_effects_xpro_callback (gint width, gint height, guint texture,
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gpointer data)
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{
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GstGLEffects *effects = GST_GL_EFFECTS (data);
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gst_gl_effects_rgb_to_curve (effects, xpro_curve, GST_GL_EFFECTS_CURVE_XPRO,
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width, height, texture);
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}
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void
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gst_gl_effects_xpro (GstGLEffects * effects)
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{
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GstGLFilter *filter = GST_GL_FILTER (effects);
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gst_gl_filter_render_to_target (filter, effects->intexture,
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effects->outtexture, gst_gl_effects_xpro_callback, effects);
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}
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