-#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 (C) 2006-2008 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 <png.h>
+
+#include "tools.h"
#include "image.h"
#include "lbx.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.");
+}
+
static const char *progname;
#define errmsg(fmt, ...) (\
fprintf(stderr, "%s: " fmt, progname, __VA_ARGS__)\
MODE_IDENT,
};
+int parserange(struct lbx_imginfo *info, char *str, unsigned char *bits)
+{
+ unsigned long start, end;
+ unsigned int i;
+ char *endptr;
+
+ start = strtoul(str, &endptr, 0);
+ if (start >= info->nframes) {
+ errmsg("frame %lu out of range.\n", start);
+ return -1;
+ }
+
+ if (endptr == str) {
+ errmsg("invalid frame range: %s.\n", str);
+ return -1;
+ }
+
+ switch (*endptr) {
+ case '\0':
+ end = start;
+ break;
+ case '-':
+ end = strtoul(endptr+1, &endptr, 0);
+ if (end >= info->nframes) {
+ errmsg("frame %lu out of range.\n", end);
+ return -1;
+ }
+
+ if (endptr == str)
+ end = info->nframes - 1;
+ break;
+ default:
+ errmsg("invalid frame range: %s.\n", str);
+ return -1;
+ }
+
+ if (end < start) {
+ errmsg("invalid frame range: %s.\n", str);
+ return -1;
+ }
+
+ for (i = start; i <= end; i++) {
+ bits[i / CHAR_BIT] |= 1 << (i % CHAR_BIT);
+ }
+
+ return 0;
+}
+
+static int ismasked(unsigned char **mask, unsigned width, unsigned height)
+{
+ unsigned y, x;
+ for (y = 0; y < height; y++) {
+ for (x = 0; x < width; x++) {
+ if (mask[y][x] == 0) return 1;
+ }
+ }
+
+ 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"];
+ unsigned char *row;
+ unsigned int x, y;
+ FILE *of;
+
+ png_structp png;
+ png_infop info;
+
+ assert(frameno < 65536);
+ snprintf(name, sizeof name, "%s.%03d.png", outname, frameno);
+
+ row = malloc(4 * width);
+ if (!row) {
+ errmsg("failed to allocate row buffer: %s\n", strerror(errno));
+ return -1;
+ }
+
+ of = fopen(name, "wb");
+ if (!of) {
+ errmsg("failed to open %s: %s.\n", name, strerror(errno));
+ free(row);
+ return -1;
+ }
+
+ png = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+ if (!png) {
+ errmsg("failed to init libpng.\n", 0);
+ goto err;
+ }
+
+ info = png_create_info_struct(png);
+ if (!info) {
+ errmsg("failed to init libpng.\n", 0);
+ png_destroy_write_struct(&png, NULL);
+ goto err;
+ }
+
+ if (setjmp(png_jmpbuf(png))) {
+ free(row);
+ png_destroy_write_struct(&png, &info);
+ goto err;
+ }
+
+ png_init_io(png, of);
+
+ if (!ismasked(mask, width, height)) {
+ /*
+ * This case is easy; we can just feed the palette and pixel
+ * data to libpng and let it do its magic.
+ */
+
+ png_color png_palette[256];
+ for (unsigned i = 0; i < 256; i++) {
+ png_palette[i].red = palette[i].red;
+ png_palette[i].green = palette[i].green;
+ png_palette[i].blue = palette[i].blue;
+ }
+
+ png_set_IHDR(png, info, width, height, 8,
+ PNG_COLOR_TYPE_PALETTE, PNG_INTERLACE_NONE,
+ PNG_COMPRESSION_TYPE_DEFAULT,
+ PNG_FILTER_TYPE_DEFAULT);
+
+ png_set_PLTE(png, info, png_palette, 256);
+ png_set_rows(png, info, framedata);
+ png_write_png(png, info, PNG_TRANSFORM_IDENTITY, NULL);
+ } else {
+ /*
+ * Unfortunately, LBX doesn't translate nicely to PNG here.
+ * LBX has a 256 colour palette _plus_ transparency.
+ * We'll form an RGBA PNG to deal with this.
+ */
+
+ png_set_IHDR(png, info, width, height, 8,
+ PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE,
+ PNG_COMPRESSION_TYPE_DEFAULT,
+ PNG_FILTER_TYPE_DEFAULT);
+
+ png_write_info(png, info);
+
+ for (y = 0; y < height; y++) {
+ for (x = 0; x < width; x++) {
+ row[4*x+0] = palette[framedata[y][x]].red;
+ row[4*x+1] = palette[framedata[y][x]].green;
+ row[4*x+2] = palette[framedata[y][x]].blue;
+ row[4*x+3] = (mask[y][x]) ? -1 : 0;
+ }
+
+ png_write_row(png, row);
+ }
+
+ png_write_end(png, NULL);
+ }
+
+ png_destroy_write_struct(&png, &info);
+ fclose(of);
+
+ if (verbose)
+ printf("wrote %s\n", name);
+
+ return 0;
+
+err:
+ fclose(of);
+ remove(name);
+ free(row);
+ return -1;
+}
+
+static int loadoverride(FILE *f, struct lbx_colour palette[static 256])
+{
+ LBX_IMG *overimg = lbximg_fopen(f);
+ struct lbx_imginfo info;
+
+ if (!overimg) {
+ errmsg("failed to open override image: %s\n", lbx_strerror());
+ return -1;
+ }
+ lbximg_getinfo(overimg, &info);
+
+ if (!info.palettesz) {
+ errmsg("override image has no palette.\n", 0);
+ lbximg_close(overimg);
+ return -1;
+ }
+
+ if (lbximg_getpalette(overimg, palette) == -1) {
+ errmsg("error reading override palette: %s\n", lbx_strerror());
+ lbximg_close(overimg);
+ return -1;
+ }
+
+ lbximg_close(overimg);
+ return 0;
+}
+
+static int loadpalette(LBX_IMG *img, struct lbx_imginfo *info,
+ FILE *palf, FILE *override,
+ struct lbx_colour palette[static 256])
+{
+ int i;
+
+ /* In no-palette mode, use palette indices for colour. */
+ if (!usepalette) {
+ for (i = 0; i < 256; i++) {
+ palette[i] = (struct lbx_colour){i,i,i};
+ }
+
+ return 0;
+ }
+
+ /* For sanity. */
+ if (!palf && !info->palettesz && !override) {
+ errmsg("no palette available.\n", 0);
+ 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 && lbximg_loadpalette(palf, &lbx_default_fops, palette) != 0) {
+ errmsg("error reading external palette: %s\n", lbx_strerror());
+ return -1;
+ }
+
+ /* Read the embedded palette, if any. */
+ if (info->palettesz && lbximg_getpalette(img, palette) == -1) {
+ errmsg("error reading embedded palette: %s\n", lbx_strerror());
+ return -1;
+ }
+
+ /* Read the override palette, if any. */
+ if (override && loadoverride(override, palette) == -1) {
+ return -1;
+ }
+
+ return 0;
+}
+
+int decode(LBX_IMG *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;
+
+ lbximg_getinfo(img, &info);
+
+ framebits = malloc(info.nframes / 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, info.nframes / CHAR_BIT + 1);
+ } else {
+ for (i = 0; argv[i]; i++) {
+ parserange(&info, argv[i], framebits);
+ }
+ }
+
+ if (loadpalette(img, &info, palf, override, palette) == -1) {
+ goto err;
+ }
+
+ /* Extract the images, in order. */
+ for (i = 0; i < info.nframes; i++) {
+ unsigned char **data;
+ unsigned char **mask;
+
+ if (!(framebits[i / CHAR_BIT] & (1 << (i % CHAR_BIT))))
+ continue;
+
+ data = lbximg_getframe(img, i);
+ if (!data) {
+ errmsg("error in frame %u: %s\n", i, lbx_strerror());
+ continue;
+ }
+
+ mask = lbximg_getmask(img);
+
+ if (!outpng(i, data, mask, info.width, info.height, palette)) {
+ extracted = 1;
+ }
+ }
+
+ if (!extracted) {
+ errmsg("no frames extracted.\n", 0);
+ 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;
+ int mode = MODE_NONE, opt, rc = EXIT_FAILURE;
+ struct lbx_pipe_state state = { .f = stdin };
+ FILE *palf = NULL, *overf = NULL;
const char *name = "stdin";
LBX_IMG *img;
- int opt;
- static const char *sopts = "idvf:p:";
+ static const char *sopts = "idvf: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' },
+
+ { "nopalette", 0, &usepalette, 0 },
{ 0 }
};
verbose = 1;
break;
case 'f':
- if (strcmp(optarg, "-") == 0)
- break;
-
name = strrchr(optarg, '/');
name = name ? name+1 : optarg;
- inf = fopen(optarg, "rb");
- if (!inf) {
+ if (!freopen(optarg, "rb", state.f)) {
errmsg("failed to open %s: %m\n", optarg);
return EXIT_FAILURE;
}
}
break;
- default:
+ case 'O':
+ overf = fopen(optarg, "rb");
+ if (!overf) {
+ errmsg("failed to open %s: %m\n", optarg);
+ return EXIT_FAILURE;
+ }
+ break;
+ case 'V':
+ puts(VERSION_BOILERPLATE("lbximg"));
+ return EXIT_SUCCESS;
+ case 'U':
+ printusage();
+ return EXIT_SUCCESS;
+ case 'H':
+ printhelp();
+ return EXIT_SUCCESS;
+ case '?':
+ case ':':
return EXIT_FAILURE;
}
}
return EXIT_FAILURE;
}
- img = lbximg_fopen(inf);
+ if (fseek(state.f, 0, SEEK_CUR) == 0)
+ img = lbximg_open(state.f, &lbx_default_fops, NULL);
+ else
+ img = lbximg_open(&state, &lbx_pipe_fops, NULL);
+
if (!img) {
errmsg("failed to open image: %s.\n", lbx_strerror());
return EXIT_FAILURE;
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);
+ printf("%s is %ux%u LBX image, %u frame(s)%s%s\n",
+ name, info.width, info.height, info.nframes,
+ info.palettesz ? ", embedded palette" : "",
+ info.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;
+ return rc;
}
projects / liblbx.git / blobdiff