Convert bdf files to stdout.

.gitignore

@@ -1,6 +1,7 @@
 # gitignore(5) file
 *.[oa]
 *~
+*.swp
 
 # generated files
 bdf2c

bdf2c.1

@@ -7,18 +7,29 @@ bdf2c \- converts bdf font files into C include files
 .SH SYNOPSIS
 .B bdf2c
 .I [-?|-h]
+.I [-b file]
 .I [-c]
 .I [-C file]
-.I [-b]
 
 .SH DESCRIPTION
 
+bdf2c creates C source and C header file from bdf font files.  Which can be
+used to embed fonts into the executable.
+
 
 .SH OPTIONS
 .TP
 .B -?|-h
-Show help options.
+Show short help and exit.
 .TP
+.B -c
+Create C header file on stdout.
+.TP
+.B -C file
+Creates C header file 'file'.
+.TP
+.B -b file
+Read and convert bdf font 'file'.
 
 .SH AUTHOR
 Johns (2009) <johns98@gmx.net>.

bdf2c.c

@@ -20,10 +20,20 @@
 ///	$Id$
 //////////////////////////////////////////////////////////////////////////////
 
+///
+///	@mainpage
+///		bdf2c - converts bdf font files into C include files.
+///
+///		The Bitmap Distribution Format (BDF) is a file format for
+///		storing bitmap fonts. The content is presented as a text file
+///		that is intended to be human and computer readable.
+///
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <string.h>
+#include <limits.h>
 #include <errno.h>
 
 #define VERSION "1"
@@ -37,7 +47,18 @@ void CreateFontHeaderFile(FILE * out)
 {
     register int i;
 
-    fprintf(out, "// (c) 2009 Johns, License: AGPLv3\n");
+    fprintf(out, "// (c) 2009 Johns, License: AGPLv3\n\n");
+    fprintf(out, "\t/// bitmap font structure\n"
+    	"struct bitmap_font {\n"
+    	"\tunsigned char Width;\t\t///< max. character width\n"
+    	"\tunsigned char Height;\t\t///< character height\n"
+    	"\tunsigned short Chars;\t\t///< number of characters in font\n"
+    	"\tunsigned char *Widths;\t\t///< width of each character\n"
+    	"\tunsigned short *Index;\t\t///< encoding to character index\n"
+    	"\tunsigned char *Bitmap;\t\t///< bitmap of each character\n"
+	"};\n\n");
+
+    fprintf(out, "\t/// @{ defines to have human readable font files\n");
     for (i = 0; i < 256; ++i) {
 	fprintf(out, "#define %c%c%c%c%c%c%c%c 0x%02X\n",
 	    (i & 0x80) ? 'X' : '_', (i & 0x40) ? 'X' : '_',
@@ -45,10 +66,74 @@ void CreateFontHeaderFile(FILE * out)
 	    (i & 0x08) ? 'X' : '_', (i & 0x04) ? 'X' : '_',
 	    (i & 0x02) ? 'X' : '_', (i & 0x01) ? 'X' : '_', i);
     }
+    fprintf(out, "\t/// @}\n");
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
+//
+//	Print header for c file.
+//
+void Header(FILE * out, const char *name)
+{
+    fprintf(out,
+	"// Created from bdf2c Version %s, (c) 2009 by Johns\n"
+	"//\tLicense AGPLv3: GNU Affero General Public License version 3\n"
+	"\n#include \"font.h\"\n\n", VERSION);
+
+    fprintf(out,
+	"\t/// character bitmap for each encoding\n"
+	"static const unsigned char __%s_bitmap__[] = {\n", name);
+}
+
+//
+//	Print width table for c file
+//
+void WidthTable(FILE * out, const char *name, const unsigned *width_table,
+    int chars)
+{
+    fprintf(out, "};\n\n");
+
+    fprintf(out,
+	"\t/// character width for each encoding\n"
+	"static const unsigned char __%s_widths__[] = {\n", name);
+    while (chars--) {
+	printf("\t%u,\n", *width_table++);
+    }
+}
+
+//
+//	Print encoding table for c file
+//
+void EncodingTable(FILE * out, const char *name,
+    const unsigned *encoding_table, int chars)
+{
+    fprintf(out, "};\n\n");
+
+    fprintf(out,
+	"\t/// character encoding for each index entry\n"
+	"static const unsigned short __%s_index__[] = {\n", name);
+    while (chars--) {
+	printf("\t%u,\n", *encoding_table++);
+    }
+}
+
+//
+//	Print footer for c file.
+//
+void Footer(FILE * out, const char *name, int width, int height, int chars)
+{
+    fprintf(out, "};\n\n");
+    fprintf(out, "\t/// bitmap font structure\n"
+    	"struct bitmap_font %s = {\n", name);
+    fprintf(out, "\t.Width %d, .Height %d,\n", width, height);
+    fprintf(out, "\t.Chars %d,\n", chars);
+    fprintf(out, "\t.Widths __%s_widths__,\n", name);
+    fprintf(out, "\t.Index __%s_index__,\n", name);
+    fprintf(out, "\t.Bitmap __%s_bitmap__,\n", name);
+    fprintf(out, "};\n\n");
+}
+
 //
 //	Read BDF font file.
 //
@@ -56,7 +141,28 @@ void ReadBdf(FILE * bdf)
 {
     char linebuf[1024];
     char *s;
+    char *p;
+    int fontboundingbox_width;
+    int fontboundingbox_height;
+    int chars;
+    int i;
+    int n;
+    int scanline;
+    char charname[1024];
+    int encoding;
+    int bbx;
+    int bby;
+    int bbw;
+    int bbh;
+    int width;
+    unsigned *width_table;
+    unsigned *encoding_table;
+    const char *name;
 
+    name = "font";
+    fontboundingbox_width = 0;
+    fontboundingbox_height = 0;
+    chars = 0;
     for (;;) {
 	if (!fgets(linebuf, sizeof(linebuf), bdf)) {	// EOF
 	    break;
@@ -64,8 +170,126 @@ void ReadBdf(FILE * bdf)
 	if (!(s = strtok(linebuf, " \t\n\r"))) {	// empty line
 	    break;
 	}
-	printf("token:%s\n", s);
+	// printf("token:%s\n", s);
+	if (!strcasecmp(s, "FONTBOUNDINGBOX")) {
+	    p = strtok(NULL, " \t\n\r");
+	    fontboundingbox_width = atoi(p);
+	    p = strtok(NULL, " \t\n\r");
+	    fontboundingbox_height = atoi(p);
+	} else if (!strcasecmp(s, "CHARS")) {
+	    p = strtok(NULL, " \t\n\r");
+	    chars = atoi(p);
+	    break;
+	}
     }
+    /*
+    printf("%d * %dx%d\n", chars, fontboundingbox_width,
+	fontboundingbox_height);
+    */
+
+    if (chars <= 0) {
+	fprintf(stderr, "Need to know the number of characters\n");
+	exit(-1);
+    }
+    width_table = malloc(chars * sizeof(*width_table));
+    if (!width_table) {
+	fprintf(stderr, "Out of memory\n");
+	exit(-1);
+    }
+    encoding_table = malloc(chars * sizeof(*encoding_table));
+    if (!encoding_table) {
+	fprintf(stderr, "Out of memory\n");
+	exit(-1);
+    }
+
+    Header(stdout, name);
+
+    scanline = -1;
+    n = 0;
+    encoding = -1;
+    bbx = 0;
+    bby = 0;
+    bbw = 0;
+    bbh = 0;
+    width = INT_MIN;
+    strcpy(charname, "unknown character");
+    for (;;) {
+	if (!fgets(linebuf, sizeof(linebuf), bdf)) {	// EOF
+	    break;
+	}
+	if (!(s = strtok(linebuf, " \t\n\r"))) {	// empty line
+	    break;
+	}
+	// printf("token:%s\n", s);
+	if (!strcasecmp(s, "STARTCHAR")) {
+	    p = strtok(NULL, " \t\n\r");
+	    strcpy(charname, p);
+	} else if (!strcasecmp(s, "ENCODING")) {
+	    p = strtok(NULL, " \t\n\r");
+	    encoding = atoi(p);
+	} else if (!strcasecmp(s, "DWIDTH")) {
+	    p = strtok(NULL, " \t\n\r");
+	    width = atoi(p);
+	} else if (!strcasecmp(s, "BBX")) {
+	    p = strtok(NULL, " \t\n\r");
+	    bbw = atoi(p);
+	    p = strtok(NULL, " \t\n\r");
+	    bbh = atoi(p);
+	    p = strtok(NULL, " \t\n\r");
+	    bbx = atoi(p);
+	    p = strtok(NULL, " \t\n\r");
+	    bby = atoi(p);
+	} else if (!strcasecmp(s, "BITMAP")) {
+	    fprintf(stdout, "// %3d $%02x '%s'\n", encoding, encoding,
+		charname);
+	    fprintf(stdout, "//\twidth %d, bbx %d, bby %d, bbw %d, bbh %d\n",
+		width, bbx, bby, bbw, bbh);
+
+	    if (n == chars) {
+		fprintf(stderr, "Too many bitmaps for characters\n");
+		exit(-1);
+	    }
+	    width_table[n] = width;
+	    encoding_table[n] = encoding;
+	    ++n;
+	    scanline = 0;
+	} else if (!strcasecmp(s, "ENDCHAR")) {
+	    scanline = -1;
+	} else {
+	    if (scanline >= 0) {
+		p = s;
+		fprintf(stdout, "\t");
+		while (*p) {
+		    if (*p <= '9') {
+			i = *p - '0';
+		    } else if (*p <= 'F') {
+			i = *p - 'A' + 10;
+		    } else {
+			i = *p - 'a' + 10;
+		    }
+		    fprintf(stdout, "%c%c%c%c", (i & 0x08) ? 'X' : '_',
+			(i & 0x04) ? 'X' : '_', (i & 0x02) ? 'X' : '_',
+			(i & 0x01) ? 'X' : '_');
+		    ++p;
+		    if (~(p - s) & 1) {
+			fprintf(stdout, ",");
+		    }
+		}
+		if ((p - s) & 1) {	// fill last nibble
+		    fprintf(stdout, "____,");
+		}
+		fprintf(stdout, "\n");
+		++scanline;
+	    }
+	}
+    }
+
+    // Output width table for proportional font.
+    WidthTable(stdout, name, width_table, chars);
+    // Output encoding table for utf-8 support
+    EncodingTable(stdout, name, encoding_table, chars);
+
+    Footer(stdout, name, fontboundingbox_width, fontboundingbox_height, chars);
 }
 
 //////////////////////////////////////////////////////////////////////////////
@@ -85,8 +309,9 @@ void PrintVersion(void)
 //
 void PrintUsage(void)
 {
-    printf("Usage: bdf2c [OPTIONs]\n" "\t-c\tCreate font header on stdout\n"
+    printf("Usage: bdf2c [OPTIONs]\n"
 	"\t-b\tRead bdf file from stdin\n"
+    	"\t-c\tCreate font header on stdout\n"
 	"\t-C file\tCreate font header file\n");
     printf("\tOnly idiots print usage on stderr\n");
 }

readme.txt

@@ -11,3 +11,15 @@ Usage:
 
 	Create font.h, which contains #defines for fonts.
 
+	./bdf2c -b < font.bdf > font.c
+
+	Create font.c which contains the converted bdf font.
+
+The C file contains:
+
+	Bitmap data for the characters.
+	Character width table for proportional font
+	Character codes table for utf-8 font
+
+TODO:
+	Proportional fonts (f.e. generated from ttf2bdf) aren't yet supported.