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/*
* Pure Data Packet module.
* Copyright (c) by Tom Schouten <tom@zwizwa.be>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/* change binary opengl state variables. all defaults (flag = 0) should be set
in the render context init.
right outlet has the thing enabled (or disabled, depending on toggle)
left outlet has the thing disabled (better: it should push it)
simple version: does not permit reentry (yet) */
#include <GL/gl.h>
#include "pdp_opengl.h"
#include "pdp_3dp_base.h"
typedef struct pdp_3d_state_struct
{
t_pdp_3dp_base x_base;
GLboolean x_flag;
GLboolean x_prev_flag;
GLenum x_thing;
void (*x_setup)(void);
} t_pdp_3d_state;
static void _setflag(GLenum thing, GLboolean flag)
{
if (flag) glEnable(thing);
else glDisable(thing);
}
static void pdp_3d_state_process_right(t_pdp_3d_state *x)
{
int p;
if (-1 != (p = pdp_3dp_base_get_context_packet(x))){
/* store previous flag */
pdp_packet_3Dcontext_set_rendering_context(p);
glGetBooleanv(x->x_thing, &x->x_prev_flag);
_setflag(x->x_thing, x->x_flag);
if (x->x_setup) x->x_setup();
}
}
static void pdp_3d_state_process_left(t_pdp_3d_state *x)
{
int p;
/* allways run left method (reset) */
if (-1 != (p = pdp_3dp_base_get_context_packet(x))){
pdp_packet_3Dcontext_set_rendering_context(p);
_setflag(x->x_thing, x->x_prev_flag);
}
}
static void pdp_3d_state_flag(t_pdp_3d_state *x, t_floatarg f)
{
x->x_flag = (f == 0.0f) ? GL_FALSE : GL_TRUE;
}
static void _blend(void) {glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);}
static void _blend_add(void) {glBlendFunc(GL_SRC_ALPHA, GL_ONE);}
t_class *pdp_3d_state_class;
void pdp_3d_state_free(t_pdp_3d_state *x){pdp_3dp_base_free(x);}
void *pdp_3d_state_new(t_symbol *s, t_floatarg f)
{
t_pdp_3d_state *x = (t_pdp_3d_state *)pd_new(pdp_3d_state_class);
/* super init */
pdp_3dp_base_init(x);
pdp_3d_state_flag(x,f);
if (s == gensym("blend_mix")) {x->x_setup = _blend; x->x_thing = GL_BLEND;}
else if (s == gensym("blend_add")) {x->x_setup = _blend_add; x->x_thing = GL_BLEND;}
else if (s == gensym("depth_test")) {x->x_setup = 0; x->x_thing = GL_DEPTH_TEST;}
/* unknown command: do nothing */
else {
post ("3dp_state: unknown flag %s", s->s_name);
pd_free((void *)x);
return 0;
}
/* create additional inlet */
pdp_base_add_gen_inlet(x, gensym("float"), gensym("flag"));
/* create dpd outlets */
pdp_3dp_base_add_outlet(x, (t_pdp_method)pdp_3d_state_process_left, 0);
pdp_3dp_base_add_outlet(x, (t_pdp_method)pdp_3d_state_process_right, 0);
return (void *)x;
}
#ifdef __cplusplus
extern "C"
{
#endif
void pdp_3d_state_setup(void)
{
pdp_3d_state_class = class_new(gensym("3dp_toggle"), (t_newmethod)pdp_3d_state_new,
(t_method)pdp_3d_state_free, sizeof(t_pdp_3d_state), 0, A_SYMBOL, A_DEFFLOAT, A_NULL);
pdp_3dp_base_setup(pdp_3d_state_class);
class_addmethod(pdp_3d_state_class, (t_method)pdp_3d_state_flag, gensym("flag"), A_FLOAT, A_NULL);
}
#ifdef __cplusplus
}
#endif
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