From c3d9923b13168be5b9f0cb1beec34fdc7c5cfe1e Mon Sep 17 00:00:00 2001
From: glenda <glenda@r51>
Date: Sat, 22 Nov 2025 05:49:00 +0000
Subject: [PATCH] load ufx

---
 ufx2font.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 82 insertions(+), 3 deletions(-)

diff --git a/ufx2font.c b/ufx2font.c
index f4e454ab9d4511eef5ad7ecd4f44b8bf2a66e8fb..b92c2a3364e5ae20ac1fddcf641a49c48e9464d1 100644
--- a/ufx2font.c
+++ b/ufx2font.c
@@ -4,7 +4,7 @@
 
 
 /* entry has 1 byte in widtab + 8 bytes per tile */
-#define ufxlen(n) (1 + ((n)*(n)*8))
+#define ufxlen(n) ((n)*(n)*8)
 
 
 enum{
@@ -36,13 +36,21 @@ struct MapFile{
 };
 
 
-uint fwidth, nglyphs;
+struct GlyphInfo{
+	uchar top, bottom, left, width;
+};
+
+
+uint fwidth, nglyphs, glyphlen;
 
 uchar setconv, donaive, doholes;
 struct MapFile *mapfiles, *lastmf;
 
 uchar wasmferr, wasreaderr;
 
+uchar *gbitmaps;
+struct GlyphInfo *ginfo;
+
 
 void
 bioerr(char *s)
@@ -277,6 +285,71 @@ printmapfile(struct MapFile *mf)
 }
 
 
+void
+sniffdims(char *file)
+{
+	uint len;
+	Dir *d;
+	char c;
+
+	len = strlen(file);
+
+	if(fwidth < 1){
+		c = file[len-1];
+		file[len-1] = '\0';
+		if('1' <= c && c <= '8' && strcmp(file+len-4, ".uf") != 0){
+			fwidth = c - '0';
+		}
+	}
+	if(fwidth < 1)
+		sysfatal("can't determine glyph width");
+	
+	glyphlen = ufxlen(fwidth);	
+
+	d = dirstat(file);
+	if(d == nil)
+		sysfatal("%r");
+
+	if(nglyphs > 0){
+		if(d->length % (1+glyphlen) != 0)
+			sysfatal("can't determine file dimensions");
+		nglyphs = d->length / (1+glyphlen);
+	}else if(nglyphs * (1+glyphlen) > d->length)
+		sysfatal("file too short");
+}
+void
+loadufx(char *infile)
+{
+	Biobuf *b;
+	uint i, len;
+	int n;
+
+	len = nglyphs * glyphlen;
+	gbitmaps = malloc(len);
+	ginfo = malloc(nglyphs * sizeof(struct GlyphInfo));
+	b = Bopen(infile, OREAD);
+	
+	for(i = 0; i < nglyphs; i++){
+		n = Bgetc(b);
+		if(n < 0)
+			sysfatal("%r");
+		ginfo[i].width = n;
+	}
+
+	if(Bread(b, gbitmaps, len) == len)
+		sysfatal("%r");
+
+	Bterm(b);
+}
+void
+parseglyphs(void)
+{
+	uint i;
+
+	sysfatal("TODO");
+}
+
+
 void
 usage(void)
 {
@@ -296,6 +369,8 @@ main(int argc, char **argv)
 		break;
 	case 'x':
 		fwidth = atoi(EARGF(usage()));
+		if(1 > fwidth || fwidth > 8)
+			sysfatal("-x: width must be in range 1-8");
 		break;
 	case 'n':
 		setconv = 1;
@@ -324,9 +399,11 @@ main(int argc, char **argv)
 
 	if(argc != 2)
 		usage();
+	infile = argv[0];
+	outdir = argv[1];
 
 
-	// TODO: calculate length etc etc
+	sniffdims(infile);
 
 	for(mf = mapfiles; mf != nil; mf = mf->next)
 		parsemapfile(mf);
@@ -334,4 +411,6 @@ main(int argc, char **argv)
 		exits("mapfile");
 	for(mf = mapfiles; mf != nil; mf = mf->next)
 		printmapfile(mf);
+
+	loadufx(infile);
 }