X-Git-Url: https://git.draconx.ca/gitweb/liblbx.git/blobdiff_plain/e1720d76904b883a5a4e820c631afe816ffd2701..53490041359e79f228709707af34ea9c60750dcb:/src/lbximg.c

diff --git a/src/lbximg.c b/src/lbximg.c
index d528290..ca618ca 100644
--- a/src/lbximg.c
+++ b/src/lbximg.c
@@ -1,26 +1,55 @@
-#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 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 <stdbool.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 "error.h"
 #include "lbx.h"
 
+#include "imgoutput.h"
+
 /* Global flags */
 static int verbose = 0;
 static char *outname = "out";
 static int usepalette = 1;
 
-static const char *progname;
-#define errmsg(fmt, ...) (\
-	fprintf(stderr, "%s: " fmt, progname, __VA_ARGS__)\
-)
+static void printusage(void)
+{
+	puts("usage: lbximg [-i|-d] [-v] [-p palette_file] [-O override_file]"
+	                  " [-f path]");
+	puts("              [-F format] [frameno ...]");
+}
+
+static void printhelp(void)
+{
+	printusage();
+	puts("For now, see the man page for detailed help.");
+}
 
 enum {
 	MODE_NONE,
@@ -28,20 +57,68 @@ enum {
 	MODE_IDENT,
 };
 
-int parserange(struct lbx_imginfo *info, char *str, unsigned char *bits)
+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 x, y;
+
+	for (x = y = 0; y < height; ++x < width || (x = 0, y++)) {
+		if (mask[y][x] == 0)
+			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 >= info->nframes) {
-		errmsg("frame %lu out of range.\n", start);
+	if (start >= frames) {
+		tool_err(-1, "frame %lu out of range.", start);
 		return -1;
 	}
 
 	if (endptr == str) {
-		errmsg("invalid frame range: %s.\n", str);
+		tool_err(-1, "invalid frame range: %s.", str);
 		return -1;
 	}
 
@@ -51,21 +128,21 @@ int parserange(struct lbx_imginfo *info, char *str, unsigned char *bits)
 		break;
 	case '-':
 		end = strtoul(endptr+1, &endptr, 0);
-		if (end >= info->nframes) {
-			errmsg("frame %lu out of range.\n", end);
+		if (end >= frames) {
+			tool_err(-1, "frame %lu out of range.", end);
 			return -1;
 		}
 
 		if (endptr == str)
-			end = info->nframes - 1;
+			end = frames - 1;
 		break;
 	default:
-		errmsg("invalid frame range: %s.\n", str);
+		tool_err(-1, "invalid frame range: %s.", str);
 		return -1;
 	}
 
 	if (end < start) {
-		errmsg("invalid frame range: %s.\n", str);
+		tool_err(-1, "invalid frame range: %s.", str);
 		return -1;
 	}
 
@@ -76,96 +153,108 @@ int parserange(struct lbx_imginfo *info, char *str, unsigned char *bits)
 	return 0;
 }
 
-int outpng(unsigned int frameno, unsigned char **framedata,
-           unsigned int width,   unsigned int height,
+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])
 {
 	char name[strlen(outname) + sizeof ".65535.png"];
 	FILE *of;
+	int rc;
 
-	png_structp png;
-	png_infop   info;
-
+	assert(fmt->output != NULL);
 	assert(frameno < 65536);
-	snprintf(name, sizeof name, "%s.%03d.png", outname, frameno);
-	
+	snprintf(name, sizeof name, "%s.%03d.%s", outname, frameno, fmt->name);
+
 	of = fopen(name, "wb");
 	if (!of) {
-		errmsg("failed to open %s: %s.\n", name, strerror(errno));
+		tool_err(0, "failed to open %s", name);
 		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;
+	rc = fmt->output(of, name, width, height, framedata, mask, palette);
+	if (rc < 0) {
+		fclose(of);
+		return -1;
 	}
 
-	if (setjmp(png_jmpbuf(png))) {
-		png_destroy_write_struct(&png, &info);
-		goto err;
+	if (fclose(of) == EOF) {
+		tool_err(0, "error writing %s", name);
+		return -1;
 	}
-
 		
-	png_set_IHDR(png, info, width, height, 8,
-	             usepalette ? PNG_COLOR_TYPE_PALETTE : PNG_COLOR_TYPE_GRAY,
-	             PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,
-	             PNG_FILTER_TYPE_DEFAULT);
+	if (verbose)
+		printf("wrote %s\n", name);
 
-	if (usepalette)
-		png_set_PLTE(png, info, (png_colorp)palette, 256);
-	png_set_rows(png, info, framedata);
+	return 0;
+}
 
-	png_init_io(png, of);
-	png_write_png(png, info, PNG_TRANSFORM_IDENTITY, NULL);
+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;
 
-	png_destroy_write_struct(&png, &info);
-	fclose(of);
+	if (!overimg) {
+		tool_err(-1, "failed to open override image: %s", lbx_errmsg());
+		return -1;
+	}
+	lbx_img_getinfo(overimg, &info);
 
-	if (verbose)
-		printf("wrote %s\n", name);
+	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;
-err:
-	fclose(of);
-	remove(name);
-	return -1;
 }
 
-static int loadpalette(LBX_IMG *img, struct lbx_imginfo *info,
-                       FILE *palf, struct lbx_colour palette[static 256])
+static int loadpalette(struct lbx_image *img, struct lbx_imginfo *info,
+                       FILE *palf, FILE *override,
+                       struct lbx_colour palette[static 256])
 {
 	int i;
 
-	for (i = 0; i < 256; i++)
-		palette[i] = (struct lbx_colour){0xff, 0x00, 0xff};
+	/* For sanity. */
+	if (!palf && !info->palettesz && !override) {
+		tool_err(-1, "no palette available.");
+		return -1;
+	}
 
-	if (palf) {
-		if (lbximg_loadpalette(palf, palette) == -1) {
-			errmsg("error reading palette: %s\n", lbx_strerror());
-			return -1;
-		}
-	} else if (!info->haspalette) {
-		errmsg("no palette available.\n", 0);
+	/* Default the palette to a wonderful pink. */
+	for (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;
+	}
+
+	/* 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;
 	}
 
-	if (lbximg_getpalette(img, palette) == -1) {
-		errmsg("error reading embedded palette: %s\n", lbx_strerror());
+	/* 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)
+static int
+decode(struct lbx_image *img, FILE *palf, FILE *override, int fmt, char **argv)
 {
 	unsigned char *framebits;
 	struct lbx_colour palette[256];
@@ -173,9 +262,11 @@ int decode(LBX_IMG *img, FILE *palf, FILE *override, char **argv)
 	int extracted = 0;
 	unsigned int i;
 
-	lbximg_getinfo(img, &info);
+	assert(fmt >= 0 && fmt < sizeof formats / sizeof formats[0]);
+
+	lbx_img_getinfo(img, &info);
 
-	framebits = malloc(info.nframes / CHAR_BIT + 1);
+	framebits = calloc(1, img->frames / CHAR_BIT + 1);
 	if (!framebits) {
 		return EXIT_FAILURE;
 	}
@@ -183,67 +274,47 @@ int decode(LBX_IMG *img, FILE *palf, FILE *override, char **argv)
 	/* Figure out what images we're extracting. */
 	if (!argv[0]) {
 		/* extract all images by default. */
-		memset(framebits, -1, info.nframes / CHAR_BIT + 1);
+		memset(framebits, -1, img->frames / CHAR_BIT + 1);
 	} else {
 		for (i = 0; argv[i]; i++) {
-			parserange(&info, argv[i], framebits);
+			parserange(img->frames, argv[i], framebits);
 		}
 	}
 
-	if (usepalette && loadpalette(img, &info, palf, palette) == -1) {
-		goto err;
-	}
-
-	if (override) {
-		LBX_IMG *overimg = lbximg_fopen(override);
-		struct lbx_imginfo info;
-
-		if (!overimg) {
-			errmsg("failed to open override image: %s\n",
-			       lbx_strerror());
+	if (usepalette) {
+		if (loadpalette(img, &info, palf, override, palette) == -1) {
 			goto err;
 		}
-		lbximg_getinfo(overimg, &info);
-
-		if (!info.haspalette) {
-			errmsg("override image has no palette.\n", 0);
-			lbximg_close(overimg);
-			goto err;
-		}
-
-		if (lbximg_getpalette(overimg, palette) == -1) {
-			errmsg("error reading override palette: %s\n",
-			       lbx_strerror());
-			lbximg_close(overimg);
-			goto err;
-		}
-
-		lbximg_close(overimg);
 	}
 
 	/* Extract the images, in order. */
-	for (i = 0; i < info.nframes; i++) {
-		unsigned char **framedata;
+	for (i = 0; i < img->frames; i++) {
+		unsigned char **data;
+		unsigned char **mask;
 
 		if (!(framebits[i / CHAR_BIT] & (1 << (i % CHAR_BIT))))
 			continue;
 
-		framedata = lbximg_getframe(img, i);
-		if (!framedata) {
-			errmsg("error in frame %u: %s\n", i, lbx_strerror());
+		data = lbx_img_getframe(img, i);
+		if (!data) {
+			tool_err(-1, "error in frame %u: %s", i, lbx_errmsg());
 			continue;
 		}
 
-		if (!outpng(i, framedata, info.width, info.height, palette)) {
+		mask = lbx_img_getmask(img);
+
+		if (!output(i, &formats[fmt], data, mask,
+		            img->width, img->height,
+			    usepalette ? palette : NULL)) {
 			extracted = 1;
 		}
 	}
 
 	if (!extracted) {
-		errmsg("no frames extracted.\n", 0);
+		tool_err(-1, "no frames extracted.");
 		goto err;
 	}
-	
+
 	free(framebits);
 	return EXIT_SUCCESS;
 err:
@@ -253,27 +324,32 @@ err:
 
 int main(int argc, char **argv)
 {
-	int mode = MODE_NONE;
-	FILE *inf = stdin, *palf = NULL, *overf = NULL;
-	const char *name = "stdin";
-	LBX_IMG *img;
-	int opt;
+	int mode = MODE_NONE, fmt, opt, rc = EXIT_FAILURE;
+	struct lbx_pipe_state stdin_handle = { .f = stdin };
+	const char *file = NULL, *fmtstring = NULL;
+	FILE *palf = NULL, *overf = NULL;
+	struct lbx_image *img;
 
-	static const char *sopts = "idvf:p:O:";
+	static const char sopts[] = "idnvF:f:p:O:VH";
 	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' },
-		{ "override", 1, NULL, 'p' },
+		{ "ident",      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' },
 
-		{ "nopalette", 0, &usepalette, 0 },
+		{ "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':
@@ -285,23 +361,19 @@ 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);
+				tool_err(0, "failed to open %s", optarg);
 				return EXIT_FAILURE;
 			}
 
@@ -309,46 +381,63 @@ int main(int argc, char **argv)
 		case 'O':
 			overf = fopen(optarg, "rb");
 			if (!overf) {
-				errmsg("failed to open %s: %m\n", optarg);
+				tool_err(0, "failed to open %s", optarg);
 				return EXIT_FAILURE;
 			}
 			break;
-		case '?':
-		case ':':
+		case 'V':
+			tool_version();
+			return EXIT_SUCCESS;
+		case 'U':
+			printusage();
+			return EXIT_SUCCESS;
+		case 'H':
+			printhelp();
+			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 (verbose || mode == MODE_IDENT) {
 		struct lbx_imginfo info;
-		lbximg_getinfo(img, &info);
 
-		printf("%s is %ux%u LBX image, %u frame(s)%s%s\n",
-		       name, info.width, info.height, info.nframes,
-		       info.haspalette ? ", embedded palette" : "",
-		       info.looping    ? ", loops" : "");
+		if (!file)
+			file = "stdin";
+
+		lbx_img_getinfo(img, &info);
+		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" : "");
 	}
 
 	switch (mode) {
 	case MODE_DECODE:
-		if (decode(img, palf, overf, &argv[optind])) {
-			lbximg_close(img);
-			return EXIT_FAILURE;
-		}
+		rc = decode(img, palf, overf, fmt, &argv[optind]);
 		break;
 	}
 
-	lbximg_close(img);
-	return EXIT_SUCCESS;
+	lbx_img_close(img);
+	return rc;
 }