-#define _GNU_SOURCE
+/*
+ * 2ooM: The Master of Orion II Reverse Engineering Project
+ * Simple command-line tool to convert an LBX image to a set of PNGs.
+ * Copyright © 2006-2011, 2013 Nick Bowler
+ *
+ * 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 <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <limits.h>
+#include <assert.h>
#include <getopt.h>
+#include <errno.h>
+#include "tools.h"
#include "image.h"
+#include "error.h"
#include "lbx.h"
-static const char *progname;
-#define errmsg(fmt, ...) (\
- fprintf(stderr, "%s: " fmt, progname, __VA_ARGS__)\
-)
+#include "imgoutput.h"
+
+/* Global flags */
+static int verbose = 0;
+static char *outname = "out";
+static int usepalette = 1;
+
+static void printusage(void)
+{
+ puts("usage: lbximg [-i|-d] [-v] [-p palette_file] [-O override_file]"
+ " [-f path]");
+ puts(" [frameno ...]");
+}
+
+static void printhelp(void)
+{
+ printusage();
+ puts("For now, see the man page for detailed help.");
+}
enum {
MODE_NONE,
MODE_IDENT,
};
+int parserange(unsigned frames, char *str, unsigned char *bits)
+{
+ unsigned long start, end;
+ unsigned int i;
+ char *endptr;
+
+ start = strtoul(str, &endptr, 0);
+ if (start >= frames) {
+ tool_err(-1, "frame %lu out of range.", start);
+ return -1;
+ }
+
+ if (endptr == str) {
+ tool_err(-1, "invalid frame range: %s.", str);
+ return -1;
+ }
+
+ switch (*endptr) {
+ case '\0':
+ end = start;
+ break;
+ case '-':
+ end = strtoul(endptr+1, &endptr, 0);
+ if (end >= frames) {
+ tool_err(-1, "frame %lu out of range.", end);
+ return -1;
+ }
+
+ if (endptr == str)
+ end = frames - 1;
+ break;
+ default:
+ tool_err(-1, "invalid frame range: %s.", str);
+ return -1;
+ }
+
+ if (end < start) {
+ tool_err(-1, "invalid frame range: %s.", str);
+ return -1;
+ }
+
+ for (i = start; i <= end; i++) {
+ bits[i / CHAR_BIT] |= 1 << (i % CHAR_BIT);
+ }
+
+ return 0;
+}
+
+int outpng(unsigned int frameno,
+ unsigned char **framedata, unsigned char **mask,
+ unsigned int width, unsigned int height,
+ struct lbx_colour palette[static 256])
+{
+ char name[strlen(outname) + sizeof ".65535.png"];
+ FILE *of;
+ int rc;
+
+ assert(frameno < 65536);
+ snprintf(name, sizeof name, "%s.%03d.png", outname, frameno);
+
+ of = fopen(name, "wb");
+ if (!of) {
+ tool_err(0, "failed to open %s", name);
+ return -1;
+ }
+
+ rc = img_output_png(of, name, width, height, framedata, mask, palette);
+ if (rc < 0) {
+ fclose(of);
+ return -1;
+ }
+
+ if (fclose(of) == EOF) {
+ tool_err(0, "error writing %s", name);
+ return -1;
+ }
+
+ if (verbose)
+ printf("wrote %s\n", name);
+
+ return 0;
+}
+
+static int loadoverride(FILE *f, struct lbx_colour palette[static 256])
+{
+ struct lbx_image *overimg = lbx_img_open(f, &lbx_default_fops, NULL);
+ struct lbx_imginfo info;
+
+ if (!overimg) {
+ tool_err(-1, "failed to open override image: %s", lbx_errmsg());
+ return -1;
+ }
+ lbx_img_getinfo(overimg, &info);
+
+ if (!info.palettesz) {
+ tool_err(-1, "override image has no palette.");
+ lbx_img_close(overimg);
+ return -1;
+ }
+
+ if (lbx_img_getpalette(overimg, palette) == -1) {
+ tool_err(-1, "error reading override palette: %s", lbx_errmsg());
+ lbx_img_close(overimg);
+ return -1;
+ }
+
+ lbx_img_close(overimg);
+ return 0;
+}
+
+static int loadpalette(struct lbx_image *img, struct lbx_imginfo *info,
+ FILE *palf, FILE *override,
+ struct lbx_colour palette[static 256])
+{
+ int i;
+
+ /* For sanity. */
+ if (!palf && !info->palettesz && !override) {
+ tool_err(-1, "no palette available.");
+ return -1;
+ }
+
+ /* Default the palette to a wonderful pink. */
+ for (i = 0; i < 256; i++) {
+ palette[i] = (struct lbx_colour){0xff, 0x00, 0xff};
+ }
+
+ /* Read the external palette, if any. */
+ if (palf && lbx_img_loadpalette(palf, &lbx_default_fops, palette) != 0) {
+ tool_err(-1, "error reading external palette: %s", lbx_errmsg());
+ return -1;
+ }
+
+ /* Read the embedded palette, if any. */
+ if (info->palettesz && lbx_img_getpalette(img, palette) == -1) {
+ tool_err(-1, "error reading embedded palette: %s", lbx_errmsg());
+ return -1;
+ }
+
+ /* Read the override palette, if any. */
+ if (override && loadoverride(override, palette) == -1) {
+ return -1;
+ }
+
+ return 0;
+}
+
+int decode(struct lbx_image *img, FILE *palf, FILE *override, char **argv)
+{
+ unsigned char *framebits;
+ struct lbx_colour palette[256];
+ struct lbx_imginfo info;
+ int extracted = 0;
+ unsigned int i;
+
+ lbx_img_getinfo(img, &info);
+
+ framebits = calloc(1, img->frames / CHAR_BIT + 1);
+ if (!framebits) {
+ return EXIT_FAILURE;
+ }
+
+ /* Figure out what images we're extracting. */
+ if (!argv[0]) {
+ /* extract all images by default. */
+ memset(framebits, -1, img->frames / CHAR_BIT + 1);
+ } else {
+ for (i = 0; argv[i]; i++) {
+ parserange(img->frames, argv[i], framebits);
+ }
+ }
+
+ if (usepalette) {
+ if (loadpalette(img, &info, palf, override, palette) == -1) {
+ goto err;
+ }
+ }
+
+ /* Extract the images, in order. */
+ for (i = 0; i < img->frames; i++) {
+ unsigned char **data;
+ unsigned char **mask;
+
+ if (!(framebits[i / CHAR_BIT] & (1 << (i % CHAR_BIT))))
+ continue;
+
+ data = lbx_img_getframe(img, i);
+ if (!data) {
+ tool_err(-1, "error in frame %u: %s", i, lbx_errmsg());
+ continue;
+ }
+
+ mask = lbx_img_getmask(img);
+
+ if (!outpng(i, data, mask, img->width, img->height,
+ usepalette ? palette : NULL)) {
+ extracted = 1;
+ }
+ }
+
+ if (!extracted) {
+ tool_err(-1, "no frames extracted.");
+ goto err;
+ }
+
+ free(framebits);
+ return EXIT_SUCCESS;
+err:
+ free(framebits);
+ return EXIT_FAILURE;
+}
+
int main(int argc, char **argv)
{
- int mode = MODE_NONE, verbose = 0;
- FILE *inf = stdin, *palf = NULL;
- const char *name = "stdin";
- LBX_IMG *img;
- int opt;
+ int mode = MODE_NONE, opt, rc = EXIT_FAILURE;
+ struct lbx_pipe_state stdin_handle = { .f = stdin };
+ FILE *palf = NULL, *overf = NULL;
+ const char *file = NULL;
+ struct lbx_image *img;
- static const char *sopts = "idvf:p:";
+ static const char *sopts = "idnvf:p:O:V";
static const struct option lopts[] = {
- { "info", 0, NULL, 'i' },
- { "decode", 0, NULL, 'd' },
- { "verbose", 0, NULL, 'v' },
- { "file", 1, NULL, 'f' },
- { "palette", 1, NULL, 'p' },
+ { "ident", 0, NULL, 'i' },
+ { "decode", 0, NULL, 'd' },
+ { "verbose", 0, NULL, 'v' },
+ { "file", 1, NULL, 'f' },
+ { "palette", 1, NULL, 'p' },
+ { "override", 1, NULL, 'p' },
+
+ { "version", 0, NULL, 'V' },
+ { "usage", 0, NULL, 'U' },
+ { "help", 0, NULL, 'H' },
+
+ { "no-palette", 0, NULL, 'n' },
{ 0 }
};
- progname = "lbximg"; /* argv[0]; */
+ tool_init("lbximg", argc, argv);
while ((opt = getopt_long(argc, argv, sopts, lopts, NULL)) != -1) {
switch(opt) {
case 'i':
verbose = 1;
break;
case 'f':
- if (strcmp(optarg, "-") == 0)
- break;
-
- name = strrchr(optarg, '/');
- name = name ? name+1 : optarg;
-
- inf = fopen(optarg, "rb");
- if (!inf) {
- errmsg("failed to open %s: %m\n", optarg);
- return EXIT_FAILURE;
- }
+ file = optarg;
+ break;
+ case 'n':
+ usepalette = 0;
break;
case 'p':
palf = fopen(optarg, "rb");
if (!palf) {
- errmsg("failed to open %s: %m\n", optarg);
+ tool_err(0, "failed to open %s", optarg);
return EXIT_FAILURE;
}
break;
- default:
+ case 'O':
+ overf = fopen(optarg, "rb");
+ if (!overf) {
+ tool_err(0, "failed to open %s", optarg);
+ return EXIT_FAILURE;
+ }
+ break;
+ case 'V':
+ tool_version();
+ return EXIT_SUCCESS;
+ case 'U':
+ printusage();
+ return EXIT_SUCCESS;
+ case 'H':
+ printhelp();
+ return EXIT_SUCCESS;
+ case '?':
+ case ':':
return EXIT_FAILURE;
}
}
if (mode == MODE_NONE) {
- errmsg("you must specify a mode.\n", 0);
+ tool_err(-1, "you must specify a mode.");
return EXIT_FAILURE;
}
- img = lbximg_fopen(inf);
+ if (file)
+ img = lbx_img_fopen(file);
+ else
+ img = lbx_img_open(&stdin_handle, &lbx_pipe_fops, NULL);
+
if (!img) {
- errmsg("failed to open image: %s.\n", lbx_strerror());
+ tool_err(-1, "failed to open image: %s.", lbx_errmsg());
return EXIT_FAILURE;
}
if (verbose || mode == MODE_IDENT) {
struct lbx_imginfo info;
- lbximg_getinfo(img, &info);
- printf("%s is %ux%u LBX image, %u frames\n",
- name, info.width, info.height, info.nframes);
+ if (!file)
+ file = "stdin";
+
+ lbx_img_getinfo(img, &info);
+ printf("%s is %ux%u LBX image, %u frame(s)%s%s\n",
+ file, img->width, img->height, img->frames,
+ info.palettesz ? ", embedded palette" : "",
+ img->chunk ? ", chunked" : "",
+ info.looping ? ", loops" : "");
}
switch (mode) {
case MODE_DECODE:
- errmsg("decode function not yet implemented.\n", 0);
+ rc = decode(img, palf, overf, &argv[optind]);
break;
}
- lbximg_close(img);
- return EXIT_SUCCESS;
+ lbx_img_close(img);
+ return rc;
}
projects / liblbx.git / blobdiff