/*
* 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 Nick Bowler
+ * 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
#include <stdbool.h>
#include <string.h>
#include <limits.h>
+#include <stdint.h>
#include <assert.h>
#include <getopt.h>
#include <errno.h>
+#include "help.h"
+
#include "tools.h"
#include "image.h"
#include "error.h"
#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;
-enum {
- OPT_PREFIX = UCHAR_MAX+1,
-};
+#include "imgopts.h"
+static const char sopts[] = SOPT_STRING;
+static const struct option lopts[] = { LOPTS_INITIALIZER, {0} };
-static void printusage(void)
+static void print_usage(FILE *f)
{
- puts("usage: lbximg [-i|-d] [-v] [-p palette_file] [-O override_file]"
- " [-f path]");
- puts(" [-F format] [frameno ...]");
+ 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 printhelp(void)
+static void print_help(void)
{
- printusage();
- puts("For now, see the man page for detailed help.");
+ 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 {
return -1;
}
-bool img_is_masked(unsigned char **mask, unsigned width, unsigned height)
+bool img_is_masked(unsigned char *mask, unsigned width, unsigned height)
{
- unsigned x, y;
-
- for (x = y = 0; y < height; ++x < width || (x = 0, y++)) {
- if (mask[y][x] == 0)
- return true;
+ 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;
return 0;
}
-int output(unsigned int frameno, const struct img_format *fmt,
- unsigned char **framedata, unsigned char **mask,
- unsigned int width, unsigned int height,
- struct lbx_colour palette[static 256])
+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;
return -1;
}
- rc = fmt->output(of, name, width, height, framedata, mask, palette);
+ rc = fmt->output(of, name, width, height, pixels, pixel_mask, palette);
if (rc < 0) {
fclose(of);
return -1;
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])
+static int loadoverride(FILE *f, struct lbx_colour *palette)
{
- struct lbx_image *overimg = lbx_img_open(f, &lbx_default_fops, NULL);
- struct lbx_imginfo info;
+ struct lbx_image *img;
+ int rc, ret = 0;
- if (!overimg) {
+ img = lbx_img_open(f, &lbx_default_fops, NULL);
+ if (!img) {
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) {
+ rc = lbx_img_getpalette(img, palette);
+ if (rc < 0) {
tool_err(-1, "error reading override palette: %s", lbx_errmsg());
- lbx_img_close(overimg);
- return -1;
+ ret = -1;
+ } else if (rc == 0) {
+ tool_err(-1, "override image has no palette.");
+ ret = -1;
}
- lbx_img_close(overimg);
- return 0;
+ lbx_img_close(img);
+ return ret;
}
-static int loadpalette(struct lbx_image *img, struct lbx_imginfo *info,
- FILE *palf, FILE *override,
- struct lbx_colour palette[static 256])
+static int loadpalette(struct lbx_image *img, FILE *palf, FILE *override,
+ struct lbx_colour *palette)
{
- int i;
-
- /* For sanity. */
- if (!palf && !info->palettesz && !override) {
- tool_err(-1, "no palette available.");
- return -1;
- }
+ int rc, ret = -1;
/* Default the palette to a wonderful pink. */
- for (i = 0; i < 256; i++) {
+ for (unsigned i = 0; i < 256; i++) {
palette[i] = (struct lbx_colour){0x3f, 0x00, 0x3f};
}
/* 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;
+ 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, if any. */
- if (info->palettesz && lbx_img_getpalette(img, palette) == -1) {
+ /* 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 && loadoverride(override, palette) == -1) {
+ 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 *framebits;
+ unsigned char *pixels = NULL, *pixel_mask = NULL, *framebits = NULL;
struct lbx_colour palette[256];
- struct lbx_imginfo info;
- int ret = EXIT_SUCCESS;
+ 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]);
- lbx_img_getinfo(img, &info);
+ 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) {
- return EXIT_FAILURE;
+ 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 (usepalette) {
- if (loadpalette(img, &info, palf, override, palette) == -1) {
+ 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++) {
- unsigned char **data;
- unsigned char **mask;
+ if (divides(img->chunk, i))
+ memset(pixel_mask, 0, mask_sz);
- 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());
+ rc = decode_frame(img, i, pixels, pixel_mask);
+ if (rc < 0) {
ret = EXIT_FAILURE;
- continue;
+ goto err;
}
- mask = lbx_img_getmask(img);
+ 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 (!output(i, &formats[fmt], data, mask,
- img->width, img->height,
- usepalette ? palette : NULL)) {
- extracted = 1;
+ if (rc == 0) {
+ extracted = 1;
+ }
}
}
ret = EXIT_FAILURE;
}
err:
+ free(pixels);
+ free(pixel_mask);
free(framebits);
return ret;
}
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;
- static const char sopts[] = "idnvF:f:p:O:VH";
- static const struct option lopts[] = {
- { "identify", 0, NULL, 'i' },
- { "decode", 0, NULL, 'd' },
- { "verbose", 0, NULL, 'v' },
- { "file", 1, NULL, 'f' },
- { "format", 1, NULL, 'F' },
- { "palette", 1, NULL, 'p' },
- { "override", 1, NULL, 'O' },
- { "no-palette", 0, NULL, 'n' },
-
- { "output-prefix", 1, NULL, OPT_PREFIX },
-
- { "version", 0, NULL, 'V' },
- { "usage", 0, NULL, 'U' },
- { "help", 0, NULL, 'H' },
-
- { 0 }
- };
-
tool_init("lbximg", argc, argv);
while ((opt = getopt_long(argc, argv, sopts, lopts, NULL)) != -1) {
switch(opt) {
usepalette = 0;
break;
case 'p':
- palf = fopen(optarg, "rb");
- if (!palf) {
- tool_err(0, "failed to open %s", optarg);
- return EXIT_FAILURE;
- }
+ ext_palette = optarg;
break;
case 'O':
- overf = fopen(optarg, "rb");
- if (!overf) {
- tool_err(0, "failed to open %s", optarg);
- return EXIT_FAILURE;
- }
+ ovr_palette = optarg;
break;
- case OPT_PREFIX:
+ case LOPT_OUTPUT_PREFIX:
outname = optarg;
break;
case 'V':
tool_version();
return EXIT_SUCCESS;
- case 'U':
- printusage();
- return EXIT_SUCCESS;
case 'H':
- printhelp();
+ print_help();
return EXIT_SUCCESS;
default:
return EXIT_FAILURE;
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;
+ int palette_count;
if (!file)
file = "stdin";
- lbx_img_getinfo(img, &info);
+ 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,
- info.palettesz ? ", embedded palette" : "",
- img->chunk ? ", chunked" : "",
- info.looping ? ", loops" : "");
+ palette_count ? ", embedded palette" : "",
+ img->chunk ? ", chunked" : "",
+ img->leadin+1 < img->frames ? ", loops" : "");
}
switch (mode) {
}
lbx_img_close(img);
+ if (palf)
+ fclose(palf);
+ if (overf)
+ fclose(overf);
return rc;
}
projects / liblbx.git / blobdiff