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/*
* Pure Data Packet system implementation. : methods for the 16 bit image packet
* Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org>
*
* 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.
*
*/
/* image packet method implementation */
#include "pdp.h"
#include "pdp_forth.h"
// (p0, p1) -> (p0 (operator) p1)
t_pdp_word_error pdp_word_image_pp(t_pdp_stack *s, void *process_routine)
{
int chanmask = -1;
int packet1 = -1;
int packet2 = -1;
/* handle stack underflow */
if (s->elements < 2) return e_underflow;
/* get the packets from the stack */
pdp_stack_pop_packet(s, &packet1);
pdp_stack_pop_packet(s, &packet2);
/* ensure the destination packet is writable */
pdp_packet_replace_with_writable(&packet1);
/* process */
pdp_imageproc_dispatch_2buf(process_routine, 0, chanmask, packet1, packet2);
/* push result on stack */
pdp_stack_push_packet(s, packet1);
/* release the second packet */
pdp_packet_mark_unused(packet2);
return e_ok;
}
t_pdp_word_error pdp_word_image_add(t_pdp_stack *s) {return pdp_word_image_pp(s, pdp_imageproc_add_process);}
t_pdp_word_error pdp_word_image_mul(t_pdp_stack *s) {return pdp_word_image_pp(s, pdp_imageproc_mul_process);}
/* enter a (float packet packet) -> (packet) routine */
#define ENTER_FPP_P(f, p0, p1) \
void *x; \
int p0; \
int p1; \
float f; \
if (s->elements < (3)) return e_underflow; \
pdp_stack_pop_float(s, &(f)); \
pdp_stack_pop_packet(s, &(p0)); \
pdp_stack_pop_packet(s, &(p1)); \
pdp_packet_replace_with_writable(&(p0));
/* leave a (float packet packet) -> (packet) routine */
#define LEAVE_FPP_P(p0, p1) \
pdp_stack_push_packet(s, p0); \
pdp_packet_mark_unused(p1); \
return e_ok;
// (f, p0, p1) -> ((1-f)*p0 + f*p1)
t_pdp_word_error pdp_word_image_mix(t_pdp_stack *s)
{
ENTER_FPP_P(mix, p0, p1);
/* process */
x = pdp_imageproc_mix_new();
pdp_imageproc_mix_setleftgain(x, 1.0f - mix);
pdp_imageproc_mix_setrightgain(x, mix);
pdp_imageproc_dispatch_2buf(&pdp_imageproc_mix_process, x, -1, p0, p1);
pdp_imageproc_mix_delete(x);
LEAVE_FPP_P(p0, p1);
}
// (f, p0) -> (f*p0)
t_pdp_word_error pdp_word_image_gain(t_pdp_stack *s)
{
void *gaindata;
int chanmask = -1;
int packet = -1;
float gain = 0.5f;
/* handle stack underflow */
if (s->elements < 2) return e_underflow;
/* get the packets from the stack */
pdp_stack_pop_float(s, &gain);
pdp_stack_pop_packet(s, &packet);
/* ensure the destination packet is writable */
pdp_packet_replace_with_writable(&packet);
/* process */
gaindata = pdp_imageproc_gain_new();
pdp_imageproc_gain_setgain(gaindata, gain);
pdp_imageproc_dispatch_1buf(&pdp_imageproc_gain_process, gaindata, chanmask, packet);
pdp_imageproc_mix_delete(gaindata);
/* push result on stack */
pdp_stack_push_packet(s, packet);
return e_ok;
}
// (f, p0) -> (f*p0)
t_pdp_word_error pdp_word_image_chanmask(t_pdp_stack *s)
{
unsigned int chanmask = 0;
int packet = -1;
/* handle stack underflow */
if (s->elements < 2) return e_underflow;
/* get the packets from the stack */
pdp_stack_pop_int(s, &chanmask);
pdp_stack_pop_packet(s, &packet);
/* ensure the destination packet is writable */
pdp_packet_replace_with_writable(&packet);
/* set channel mask */
pdp_packet_image_set_chanmask(packet, chanmask);
/* push result on stack */
pdp_stack_push_packet(s, packet);
return e_ok;
}
static void _add_image_primitive(char *name, int in, int out, int type_index, void *w)
{
pdp_forthdict_add_primitive(pdp_gensym(name), w, in, out, type_index, pdp_gensym("image/*/*"));
}
void pdp_image_words_setup(t_pdp_class *c)
{
/* add image specific words */
_add_image_primitive ("add", 2, 1, 0, pdp_word_image_add);
_add_image_primitive ("mix", 3, 1, 1, pdp_word_image_mix);
_add_image_primitive ("scale", 2, 1, 1, pdp_word_image_gain);
_add_image_primitive ("mul", 2, 1, 0, pdp_word_image_mul);
_add_image_primitive ("chanmask", 2, 1, 1, pdp_word_image_chanmask);
/* add some type oblivious words */
pdp_forthdict_compile_word(pdp_gensym("add3"), "(add dup add)", 2, 1, -1, 0);
pdp_forthdict_compile_word(pdp_gensym("mixtest"), "(0.8 2 mov mix)", 2, 1, -1, 0);
/* define a processor:
def = pdp_forth_compile_def("(inlist, outlist, setup, process)");
*/
}
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