X-Git-Url: https://git.draconx.ca/gitweb/liblbx.git/blobdiff_plain/fba9c8ad290c71471cdb8b52d1c5f0e4eb1fb83e..c123302699919b0f34de9bc5d9019c2c1f14b7a1:/src/lbximg.c
diff --git a/src/lbximg.c b/src/lbximg.c
index 0770049..f997506 100644
--- a/src/lbximg.c
+++ b/src/lbximg.c
@@ -1,16 +1,85 @@
-#define _GNU_SOURCE
+/*
+ * 2ooM: The Master of Orion II Reverse Engineering Project
+ * Simple command-line tool to convert an LBX image to other formats.
+ * Copyright © 2006-2011, 2013-2014, 2021 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 .
+ */
+#include
#include
#include
+#include
#include
+#include
+#include
+#include
#include
+#include
+#include "help.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"
+
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+
+/* Global flags */
+static int verbose = 0;
+static char *outname = "out";
+static int usepalette = 1;
+
+#include "imgopts.h"
+static const char sopts[] = SOPT_STRING;
+static const struct option lopts[] = { LOPTS_INITIALIZER, {0} };
+
+static void print_usage(FILE *f)
+{
+ const char *progname = tool_invocation();
+
+ fprintf(f, "Usage: %s [options] [-i|-d] [frame ...]\n", progname);
+ if (f != stdout)
+ fprintf(f, "Try %s --help for more information.\n", progname);
+}
+
+static void print_help(void)
+{
+ const struct option *opt;
+
+ print_usage(stdout);
+
+ putchar('\n');
+ puts("Options:");
+ for (opt = lopts; opt->name; opt++) {
+ struct lopt_help help;
+ int w;
+
+ if (!lopt_get_help(opt, &help))
+ continue;
+
+ help_print_option(opt, help.arg, help.desc, 20);
+ }
+ putchar('\n');
+
+ puts("For more information, see the lbximg(1) man page.");
+ putchar('\n');
+
+ printf("Report bugs to <%s>.\n", PACKAGE_BUGREPORT);
+}
enum {
MODE_NONE,
@@ -18,26 +87,385 @@ enum {
MODE_IDENT,
};
+static const struct img_format {
+ img_output_func *output;
+ char name[4];
+ bool enabled;
+} formats[] = {
+#if HAVE_LIBPNG
+ { img_output_png, "png", 1 },
+#endif
+ { img_output_pam, "pam", 1 },
+ { img_output_ppm, "ppm", 1 },
+ { img_output_pbm, "pbm", 1 },
+};
+
+static int lookup_format(const char *fmt)
+{
+ for (size_t i = 0; i < sizeof formats / sizeof formats[0]; i++) {
+ assert(!formats[i].name[sizeof formats[i].name - 1]);
+
+ if (!fmt && formats[i].enabled)
+ return i;
+
+ if (strcmp(formats[i].name, fmt))
+ continue;
+
+ if (!formats[i].enabled) {
+ tool_err(-1, "%s support disabled at build time", fmt);
+ return -1;
+ }
+
+ return i;
+ }
+
+ tool_err(-1, "unknown format %s", fmt);
+ return -1;
+}
+
+bool img_is_masked(unsigned char *mask, unsigned width, unsigned height)
+{
+ unsigned long npixels = (unsigned long) width * height;
+ unsigned long mask_sz = npixels / CHAR_BIT + (npixels % CHAR_BIT != 0);
+
+ for (unsigned long i = 0; i < mask_sz; i++) {
+ if (i+1 < mask_sz) {
+ if (mask[i] != (unsigned char)-1)
+ return true;
+ } else {
+ unsigned char test = (1u << npixels % CHAR_BIT) - 1;
+
+ if ((mask[i] & test) != test)
+ return true;
+ }
+ }
+
+ return false;
+}
+
+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;
+}
+
+static int output(unsigned int frameno, const struct img_format *fmt,
+ unsigned char *pixels, unsigned char *pixel_mask,
+ unsigned int width, unsigned int height,
+ struct lbx_colour *palette)
+{
+ char name[strlen(outname) + sizeof ".65535.png"];
+ FILE *of;
+ int rc;
+
+ assert(fmt->output != NULL);
+ assert(frameno < 65536);
+ snprintf(name, sizeof name, "%s.%03d.%s", outname, frameno, fmt->name);
+
+ of = fopen(name, "wb");
+ if (!of) {
+ tool_err(0, "failed to open %s", name);
+ return -1;
+ }
+
+ rc = fmt->output(of, name, width, height, pixels, pixel_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)
+{
+ struct lbx_image *img;
+ int rc, ret = 0;
+
+ img = lbx_img_open(f, &lbx_default_fops, NULL);
+ if (!img) {
+ tool_err(-1, "failed to open override image: %s", lbx_errmsg());
+ return -1;
+ }
+
+ rc = lbx_img_getpalette(img, palette);
+ if (rc < 0) {
+ tool_err(-1, "error reading override palette: %s", lbx_errmsg());
+ ret = -1;
+ } else if (rc == 0) {
+ tool_err(-1, "override image has no palette.");
+ ret = -1;
+ }
+
+ lbx_img_close(img);
+ return ret;
+}
+
+static int loadpalette(struct lbx_image *img, FILE *palf, FILE *override,
+ struct lbx_colour *palette)
+{
+ int rc, ret = -1;
+
+ /* Default the palette to a wonderful pink. */
+ for (unsigned i = 0; i < 256; i++) {
+ palette[i] = (struct lbx_colour){0x3f, 0x00, 0x3f};
+ }
+
+ /* Read the external palette, if any. */
+ if (palf) {
+ rc = lbx_img_loadpalette(palf, &lbx_default_fops, palette);
+ if (rc < 0) {
+ tool_err(-1, "error reading external palette: %s", lbx_errmsg());
+ return -1;
+ }
+
+ ret = 0;
+ }
+
+ /* Read the embedded palette */
+ rc = lbx_img_getpalette(img, palette);
+ if (rc < 0) {
+ tool_err(-1, "error reading embedded palette: %s", lbx_errmsg());
+ return -1;
+ } else if (rc > 0) {
+ ret = 0;
+ }
+
+ /* Read the override palette, if any. */
+ if (override) {
+ rc = loadoverride(override, palette);
+ if (rc < 0)
+ return -1;
+ ret = 0;
+ }
+
+ /* If we literally have no palette data at all, may as well fail. */
+ if (ret < 0)
+ tool_err(-1, "no palette available.");
+ return ret;
+}
+
+/* Return true iff a divides b. */
+static bool divides(unsigned a, unsigned b)
+{
+ if (b == 0)
+ return true;
+ if (a == 0)
+ return false;
+
+ return b % a == 0;
+}
+
+/* Set n bits starting from offset in the bitmap. */
+static void
+set_bits(unsigned char *bitmap, unsigned long offset, unsigned long n)
+{
+ if (offset % CHAR_BIT) {
+ bitmap[offset/CHAR_BIT] |= (n >= CHAR_BIT ? -1u : (1u << n) - 1)
+ << offset%CHAR_BIT;
+
+ n -= MIN(n, CHAR_BIT - offset%CHAR_BIT);
+ offset += CHAR_BIT - offset%CHAR_BIT;
+ }
+
+ if (n > CHAR_BIT) {
+ memset(&bitmap[offset/CHAR_BIT], -1, n/CHAR_BIT);
+
+ offset += n - n%CHAR_BIT;
+ n %= CHAR_BIT;
+ }
+
+ if (n) {
+ bitmap[offset/CHAR_BIT] |= (1u << n) - 1;
+ }
+}
+
+static int decode_frame(struct lbx_image *img, unsigned n,
+ unsigned char *pixels, unsigned char *pixel_mask)
+{
+ unsigned x, y;
+ long rc;
+
+ rc = lbx_img_seek(img, n);
+ if (rc < 0) {
+ tool_err(-1, "frame %u: invalid frame: %s\n", n, lbx_errmsg());
+ return -1;
+ }
+
+ while ((rc = lbx_img_read_row_header(img, &x, &y)) != 0) {
+ unsigned long offset;
+
+ if (rc < 0) {
+ tool_err(-1, "frame %u: invalid row: %s", n, lbx_errmsg());
+ return -1;
+ }
+
+ offset = (unsigned long) y * img->width + x;
+ rc = lbx_img_read_row_data(img, pixels+offset);
+ if (rc < 0) {
+ tool_err(-1, "frame %u: error reading row: %s\n", n, lbx_errmsg());
+ return -1;
+ }
+
+ set_bits(pixel_mask, offset, rc);
+ }
+
+ return 0;
+}
+
+static int
+decode(struct lbx_image *img, FILE *palf, FILE *override, int fmt, char **argv)
+{
+ unsigned char *pixels = NULL, *pixel_mask = NULL, *framebits = NULL;
+ struct lbx_colour palette[256];
+ int rc, ret = EXIT_FAILURE;
+ int extracted = 0;
+ unsigned int i;
+ size_t npixels, mask_sz;
+
+ assert(fmt >= 0 && fmt < sizeof formats / sizeof formats[0]);
+
+ npixels = img->width;
+ if (img->height && npixels >= (size_t)-1 / img->height) {
+ tool_err(-1, "image too large");
+ goto err;
+ }
+ npixels *= img->height;
+
+ /* Ensure there is at least 1 byte to allocate */
+ if (npixels == 0)
+ npixels = 1;
+
+ framebits = calloc(1, img->frames / CHAR_BIT + 1);
+ if (!framebits) {
+ tool_err(0, "failed to allocate memory");
+ goto err;
+ }
+
+ pixels = calloc(img->width, img->height);
+ if (!pixels) {
+ tool_err(0, "failed to allocate memory");
+ goto err;
+ }
+
+ mask_sz = npixels / CHAR_BIT + (npixels % CHAR_BIT != 0);
+ pixel_mask = malloc(mask_sz);
+ if (!pixel_mask) {
+ tool_err(0, "failed to allocate memory");
+ goto err;
+ }
+
+ /* 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, palf, override, palette) == -1) {
+ ret = EXIT_FAILURE;
+ goto err;
+ }
+ }
+
+ /* Extract the images, in order. */
+ ret = EXIT_SUCCESS;
+ for (i = 0; i < img->frames; i++) {
+ if (divides(img->chunk, i))
+ memset(pixel_mask, 0, mask_sz);
+
+ rc = decode_frame(img, i, pixels, pixel_mask);
+ if (rc < 0) {
+ ret = EXIT_FAILURE;
+ goto err;
+ }
+
+ if (framebits[i / CHAR_BIT] & (1u << (i % CHAR_BIT))) {
+ rc = output(i, &formats[fmt], pixels, pixel_mask,
+ img->width, img->height,
+ usepalette ? palette : NULL);
+
+ if (rc == 0) {
+ extracted = 1;
+ }
+ }
+ }
+
+ if (!extracted) {
+ tool_err(-1, "no frames extracted.");
+ ret = EXIT_FAILURE;
+ }
+err:
+ free(pixels);
+ free(pixel_mask);
+ free(framebits);
+ return ret;
+}
+
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;
-
- static const char *sopts = "idvf:p:";
- 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' },
-
- { 0 }
- };
-
- progname = "lbximg"; /* argv[0]; */
+ int mode = MODE_NONE, fmt, opt, rc = EXIT_FAILURE;
+ struct lbx_pipe_state stdin_handle = { .f = stdin };
+ const char *file = NULL, *fmtstring = NULL;
+ const char *ext_palette = NULL, *ovr_palette = NULL;
+ FILE *palf = NULL, *overf = NULL;
+ struct lbx_image *img;
+
+ tool_init("lbximg", argc, argv);
while ((opt = getopt_long(argc, argv, sopts, lopts, NULL)) != -1) {
switch(opt) {
case 'i':
@@ -49,57 +477,97 @@ int main(int argc, char **argv)
case 'v':
verbose = 1;
break;
+ case 'F':
+ fmtstring = optarg;
+ 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);
- return EXIT_FAILURE;
- }
+ ext_palette = optarg;
break;
+ case 'O':
+ ovr_palette = optarg;
+ break;
+ case LOPT_OUTPUT_PREFIX:
+ outname = optarg;
+ break;
+ case 'V':
+ tool_version();
+ return EXIT_SUCCESS;
+ case 'H':
+ print_help();
+ return EXIT_SUCCESS;
default:
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);
+ fmt = lookup_format(fmtstring);
+ if (fmt < 0)
+ return EXIT_FAILURE;
+
+ 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 (ext_palette && !(palf = fopen(ext_palette, "rb"))) {
+ tool_err(0, "failed to open %s", optarg);
+ return EXIT_FAILURE;
+ }
+
+ if (ovr_palette && !(overf = fopen(ovr_palette, "rb"))) {
+ tool_err(0, "failed to open %s", optarg);
return EXIT_FAILURE;
}
if (verbose || mode == MODE_IDENT) {
- struct lbx_imginfo info;
- lbximg_getinfo(img, &info);
+ int palette_count;
- printf("%s is %ux%u LBX image, %u frames\n",
- name, info.width, info.height, info.nframes);
+ if (!file)
+ file = "stdin";
+
+ palette_count = lbx_img_getpalette(img, NULL);
+ if (palette_count < 0) {
+ tool_err(-1, "error reading image: %s", lbx_errmsg());
+ return EXIT_FAILURE;
+ }
+
+ printf("%s is %hux%hu LBX image, %hhu frame(s)%s%s%s\n",
+ file, img->width, img->height, img->frames,
+ palette_count ? ", embedded palette" : "",
+ img->chunk ? ", chunked" : "",
+ img->leadin+1 < img->frames ? ", loops" : "");
}
switch (mode) {
+ case MODE_IDENT:
+ rc = 0;
+ break;
case MODE_DECODE:
- errmsg("decode function not yet implemented.\n", 0);
+ rc = decode(img, palf, overf, fmt, &argv[optind]);
break;
}
- lbximg_close(img);
- return EXIT_SUCCESS;
+ lbx_img_close(img);
+ if (palf)
+ fclose(palf);
+ if (overf)
+ fclose(overf);
+ return rc;
}