gstreamer/gst/gl/effects/gstgleffectxray.c

353 lines
11 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>
#include <gstgleffectscurves.h>
#include <gstgleffectlumatocurve.h>
static gboolean kernel_ready = FALSE;
static float gauss_kernel[7];
static void
gst_gl_effects_xray_step_one (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
gst_gl_effects_luma_to_curve (effects, xray_curve, GST_GL_EFFECTS_CURVE_XRAY,
width, height, texture);
}
static void
gst_gl_effects_xray_step_two (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "xray1");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "xray1", shader);
}
if (!kernel_ready) {
fill_gaussian_kernel (gauss_kernel, 7, 1.5);
kernel_ready = TRUE;
}
if (!gst_gl_shader_compile_and_check (shader,
hconv7_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_display_set_error (GST_GL_FILTER (effects)->display,
"Failed to initialize hconv7 shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
(GST_GL_DISPLAY_ERR_MSG (GST_GL_FILTER (effects)->display)), (NULL));
return;
}
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE1);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (shader, "tex", 1);
gst_gl_shader_set_uniform_1fv (shader, "kernel", 9, gauss_kernel);
gst_gl_effects_draw_texture (effects, texture);
}
static void
gst_gl_effects_xray_step_three (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "xray2");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "xray2", shader);
}
if (!gst_gl_shader_compile_and_check (shader,
vconv7_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_display_set_error (GST_GL_FILTER (effects)->display,
"Failed to initialize vconv7 shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
(GST_GL_DISPLAY_ERR_MSG (GST_GL_FILTER (effects)->display)), (NULL));
return;
}
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE1);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (shader, "tex", 1);
gst_gl_shader_set_uniform_1fv (shader, "kernel", 9, gauss_kernel);
gst_gl_effects_draw_texture (effects, texture);
}
/* multipass separable sobel */
static void
gst_gl_effects_xray_desaturate (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "xray_desat");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "xray_desat", shader);
}
if (!gst_gl_shader_compile_and_check (shader,
desaturate_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_display_set_error (GST_GL_FILTER (effects)->display,
"Failed to initialize desaturate shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
(GST_GL_DISPLAY_ERR_MSG (GST_GL_FILTER (effects)->display)), (NULL));
return;
}
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE1);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (shader, "tex", 1);
gst_gl_effects_draw_texture (effects, texture);
}
static void
gst_gl_effects_xray_sobel_hconv (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "xray_sob_hconv");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "xray_sob_hconv", shader);
}
if (!gst_gl_shader_compile_and_check (shader,
sep_sobel_hconv3_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_display_set_error (GST_GL_FILTER (effects)->display,
"Failed to initialize sobel hvonc3 shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
(GST_GL_DISPLAY_ERR_MSG (GST_GL_FILTER (effects)->display)), (NULL));
return;
}
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE1);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (shader, "tex", 1);
gst_gl_effects_draw_texture (effects, texture);
}
static void
gst_gl_effects_xray_sobel_vconv (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "xray_sob_vconv");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "xray_sob_vconv", shader);
}
if (!gst_gl_shader_compile_and_check (shader,
sep_sobel_vconv3_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_display_set_error (GST_GL_FILTER (effects)->display,
"Failed to initialize sobel vconv3 shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
(GST_GL_DISPLAY_ERR_MSG (GST_GL_FILTER (effects)->display)), (NULL));
return;
}
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE1);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (shader, "tex", 1);
gst_gl_effects_draw_texture (effects, texture);
}
static void
gst_gl_effects_xray_sobel_length (gint width, gint height, guint texture,
gpointer data)
{
GstGLEffects *effects = GST_GL_EFFECTS (data);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "xray_sob_len");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "xray_sob_len", shader);
}
if (!gst_gl_shader_compile_and_check (shader,
sep_sobel_length_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_display_set_error (GST_GL_FILTER (effects)->display,
"Failed to initialize seobel length shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
(GST_GL_DISPLAY_ERR_MSG (GST_GL_FILTER (effects)->display)), (NULL));
return;
}
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE1);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (shader, "tex", 1);
gst_gl_shader_set_uniform_1i (shader, "invert", TRUE);
gst_gl_effects_draw_texture (effects, texture);
}
/* end of sobel passes */
void
gst_gl_effects_xray_step_five (gint width, gint height, guint texture,
gpointer stuff)
{
GstGLEffects *effects = GST_GL_EFFECTS (stuff);
GstGLShader *shader;
shader = g_hash_table_lookup (effects->shaderstable, "xray4");
if (!shader) {
shader = gst_gl_shader_new ();
g_hash_table_insert (effects->shaderstable, "xray4", shader);
}
if (!gst_gl_shader_compile_and_check (shader,
multiply_fragment_source, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_display_set_error (GST_GL_FILTER (effects)->display,
"Failed to initialize multiply shader");
GST_ELEMENT_ERROR (effects, RESOURCE, NOT_FOUND,
(GST_GL_DISPLAY_ERR_MSG (GST_GL_FILTER (effects)->display)), (NULL));
return;
}
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gst_gl_shader_use (shader);
glActiveTexture (GL_TEXTURE2);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, effects->midtexture[2]);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1i (shader, "base", 2);
glActiveTexture (GL_TEXTURE1);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
gst_gl_shader_set_uniform_1f (shader, "alpha", (gfloat) 0.5f);
gst_gl_shader_set_uniform_1i (shader, "blend", 1);
gst_gl_effects_draw_texture (effects, texture);
}
void
gst_gl_effects_xray (GstGLEffects * effects)
{
GstGLFilter *filter = GST_GL_FILTER (effects);
/* map luma to xray curve */
gst_gl_filter_render_to_target (filter, effects->intexture,
effects->midtexture[0], gst_gl_effects_xray_step_one, effects);
/* horizontal blur */
gst_gl_filter_render_to_target (filter, effects->midtexture[0],
effects->midtexture[1], gst_gl_effects_xray_step_two, effects);
/* vertical blur */
gst_gl_filter_render_to_target (filter, effects->midtexture[1],
effects->midtexture[2], gst_gl_effects_xray_step_three, effects);
/* detect edges with Sobel */
/* the old version used edges from the blurred texture, this uses
* the ones from original texture, still not sure what I like
* more. This one gives better edges obviously but behaves badly
* with noise */
/* desaturate */
gst_gl_filter_render_to_target (filter, effects->intexture,
effects->midtexture[3], gst_gl_effects_xray_desaturate, effects);
/* horizonal convolution */
gst_gl_filter_render_to_target (filter, effects->midtexture[3],
effects->midtexture[4], gst_gl_effects_xray_sobel_hconv, effects);
/* vertical convolution */
gst_gl_filter_render_to_target (filter, effects->midtexture[4],
effects->midtexture[3], gst_gl_effects_xray_sobel_vconv, effects);
/* gradient length */
gst_gl_filter_render_to_target (filter, effects->midtexture[3],
effects->midtexture[4], gst_gl_effects_xray_sobel_length, effects);
/* multiply edges with the blurred image */
gst_gl_filter_render_to_target (filter, effects->midtexture[4],
effects->outtexture, gst_gl_effects_xray_step_five, effects);
}