94 lines
2 KiB
C
94 lines
2 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdarg.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
|
|
#include <cammy/image.h>
|
|
#include <cammy/photo.h>
|
|
|
|
#include "pnglite.h"
|
|
#include "png.h"
|
|
#include "commands.h"
|
|
|
|
static cammy_tile_palette palette = {
|
|
.colors = {
|
|
{ 0, 0, 0 },
|
|
{ 85, 85, 85 },
|
|
{ 171, 171, 171 },
|
|
{ 255, 255, 255 }
|
|
}
|
|
};
|
|
|
|
static void usage(int argc, char **argv, const char *message, ...) {
|
|
if (message) {
|
|
va_list args;
|
|
|
|
va_start(args, message);
|
|
vfprintf(stderr, message, args);
|
|
va_end(args);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
|
|
fprintf(stderr, "usage: %1$s dither input.png output.png\n", argv[0]);
|
|
|
|
exit(1);
|
|
}
|
|
|
|
int cammy_dither(int argc, char **argv) {
|
|
uint8_t *bufin, *bufout;
|
|
size_t width, height;
|
|
int depth;
|
|
|
|
if (argc < 3) {
|
|
usage(argc, argv, "No PNG input file provided");
|
|
} else if (argc < 4) {
|
|
usage(argc, argv, "No PNG output filename provided");
|
|
}
|
|
|
|
if ((bufin = cammy_png_load(argv[2], &width,
|
|
&height,
|
|
&depth)) == NULL) {
|
|
fprintf(stderr, "%s: %s: %s\n",
|
|
argv[0], "cammy_png_load()", strerror(errno));
|
|
|
|
goto error_png_load;
|
|
}
|
|
|
|
if ((bufout = malloc(width * height * 3)) == NULL) {
|
|
fprintf(stderr, "%s: %s: %s\n",
|
|
argv[0], "malloc()", strerror(errno));
|
|
|
|
goto error_malloc_bufout;
|
|
}
|
|
|
|
cammy_image_dither(bufout, bufin, width, height, depth, &palette);
|
|
|
|
if (cammy_png_save(argv[3], bufout,
|
|
width,
|
|
height, 8, PNG_TRUECOLOR) < 0) {
|
|
fprintf(stderr, "%s: %s: %s: %s\n",
|
|
argv[0], "cammy_png_save()", argv[3], strerror(errno));
|
|
|
|
goto error_png_save;
|
|
}
|
|
|
|
free(bufout);
|
|
|
|
free(bufin);
|
|
|
|
return 0;
|
|
|
|
error_png_save:
|
|
free(bufout);
|
|
|
|
error_malloc_bufout:
|
|
free(bufin);
|
|
|
|
error_png_load:
|
|
return 1;
|
|
}
|