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/*
FLAM3 - cosmic recursive fractal flames
Copyright (C) 1992-2009 Spotworks LLC
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <jpeglib.h>
#include <string.h>
#include "config.h"
#include "img.h"
#include "flam3.h"
#include "private.h"
void
write_jpeg(FILE *file, unsigned char *image, int width, int height, flam3_img_comments *fpc) {
struct jpeg_compress_struct info;
struct jpeg_error_mgr jerr;
size_t i;
char *nick = getenv("nick");
char *url = getenv("url");
char *id = getenv("id");
char *ai; /* For argi */
int jpegcom_enable = argi("enable_jpeg_comments",1);
char nick_string[64], url_string[128], id_string[128];
char bv_string[64],ni_string[64],rt_string[64];
char genome_string[65536], ver_string[64];
/* Create the mandatory comment strings */
snprintf(genome_string,65536,"flam3_genome: %s",fpc->genome);
snprintf(bv_string,64,"flam3_error_rate: %s",fpc->badvals);
snprintf(ni_string,64,"flam3_samples: %s",fpc->numiters);
snprintf(rt_string,64,"flam3_time: %s",fpc->rtime);
snprintf(ver_string,64,"flam3_version: %s",flam3_version());
info.err = jpeg_std_error(&jerr);
jpeg_create_compress(&info);
jpeg_stdio_dest(&info, file);
info.in_color_space = JCS_RGB;
info.input_components = 3;
info.image_width = width;
info.image_height = height;
jpeg_set_defaults(&info);
if (getenv("jpeg")) {
int quality = atoi(getenv("jpeg"));
jpeg_set_quality(&info, quality, TRUE);
}
jpeg_start_compress(&info, TRUE);
/* Write comments to jpeg */
if (jpegcom_enable==1) {
jpeg_write_marker(&info, JPEG_COM, (unsigned char *)ver_string, (int)strlen(ver_string));
if (0 != nick) {
snprintf(nick_string,64,"flam3_nickname: %s",nick);
jpeg_write_marker(&info, JPEG_COM, (unsigned char *)nick_string, (int)strlen(nick_string));
}
if (0 != url) {
snprintf(url_string,128,"flam3_url: %s",url);
jpeg_write_marker(&info, JPEG_COM, (unsigned char *)url_string, (int)strlen(url_string));
}
if (0 != id) {
snprintf(id_string,128,"flam3_id: %s",id);
jpeg_write_marker(&info, JPEG_COM, (unsigned char *)id_string, (int)strlen(id_string));
}
jpeg_write_marker(&info, JPEG_COM, (unsigned char *)bv_string, (int)strlen(bv_string));
jpeg_write_marker(&info, JPEG_COM, (unsigned char *)ni_string, (int)strlen(ni_string));
jpeg_write_marker(&info, JPEG_COM, (unsigned char *)rt_string, (int)strlen(rt_string));
jpeg_write_marker(&info, JPEG_COM, (unsigned char *)genome_string, (int)strlen(genome_string));
}
for (i = 0; i < height; i++) {
JSAMPROW row_pointer[1];
row_pointer[0] = (unsigned char *) image + (3 * width * i);
jpeg_write_scanlines(&info, row_pointer, 1);
}
jpeg_finish_compress(&info);
jpeg_destroy_compress(&info);
}
unsigned char *read_jpeg(FILE *ifp, int *width, int *height) {
struct jpeg_decompress_struct cinfo;
struct jpeg_error_mgr jerr;
int num_scanlines;
unsigned char *p, *q, *t;
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_decompress(&cinfo);
jpeg_stdio_src(&cinfo, ifp);
(void) jpeg_read_header(&cinfo, TRUE);
(void) jpeg_start_decompress(&cinfo);
/* or image_width? */
*width = cinfo.output_width;
*height = cinfo.output_height;
if (3 != cinfo.output_components) {
printf("can only read RGB JPEG files, not %d components.\n",
cinfo.output_components);
return 0;
}
p = q = malloc(4 * *width * *height);
t = malloc(3 * *width);
while (cinfo.output_scanline < cinfo.output_height) {
unsigned char *s = t;
int i;
num_scanlines = jpeg_read_scanlines(&cinfo, &t, 1);
for (i = 0; i < *width; i++) {
p[0] = s[0];
p[1] = s[1];
p[2] = s[2];
p[3] = 255;
s += 3;
p += 4;
}
}
(void) jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);
free(t);
return q;
}
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