From 9fe4d4ea9c054e539ab679ed2e9c076c35beb69d Mon Sep 17 00:00:00 2001
From: etobi <git@e-tobi.net>
Date: Tue, 3 Sep 2013 09:48:45 +0200
Subject: Imported Upstream version 1.1.1+rev1355

---
 util/alevt/bdf2xbm.c | 212 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 212 insertions(+)
 create mode 100644 util/alevt/bdf2xbm.c

(limited to 'util/alevt/bdf2xbm.c')

diff --git a/util/alevt/bdf2xbm.c b/util/alevt/bdf2xbm.c
new file mode 100644
index 0000000..74d238e
--- /dev/null
+++ b/util/alevt/bdf2xbm.c
@@ -0,0 +1,212 @@
+/*
+    Simple program to convert a bdf-font to a bitmap.
+    The characters are arranged in a 32x8 matrix.
+    usage: bdf2xbm [identifier] <bdf >xbm
+    Copyright 1998,1999 by E. Toernig (froese@gmx.de)
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <stdarg.h>
+
+#define not !
+#define streq(a,b) (strcmp((a),(b)) == 0)
+
+int lineno;
+char *word[64];
+int nword;
+
+char *font = "font%dx%d";
+int w, h, bpl;
+unsigned char *bmap;
+
+
+static void error(char *fmt, ...)
+{
+    va_list args;
+
+    va_start(args, fmt);
+    fprintf(stderr, "bdf2xbm");
+    if (lineno)
+	fprintf(stderr, ":%d", lineno);
+    fprintf(stderr, ": ");
+    vfprintf(stderr, fmt, args);
+    fputc('\n', stderr);
+    exit(1);
+}
+
+
+static int nextline()
+{
+    static char buf[256];
+    char *p;
+    int i;
+
+    do
+    {
+	nword = 0;
+	if (fgets(buf, sizeof(buf), stdin) == 0)
+	    return nword;
+	lineno++;
+	
+	p = buf;
+	for (;;)
+	{
+	    while (isspace(*p))
+		p++;
+	    if (*p == 0)
+		break;
+	    word[nword++] = p;
+	    while (*p && not isspace(*p))
+		*p = toupper(*p), p++;
+	    if (*p == 0)
+		break;
+	    *p++ = 0;
+	}
+    } while (nword == 0);
+
+    for (i = nword; i < 64; ++i)
+	word[i] = "";
+    return nword;
+}
+
+
+static inline void setbit(int ch, int x, int y)
+{
+
+    int yo = ch / 32 * h + y;
+    int xo = ch % 32 * w + x;
+
+    bmap[yo * bpl + xo / 8] |= 1 << (xo % 8);
+}
+
+
+static void dobitmap(int ch, int x, int y)
+{
+    int i, j;
+
+    for (i = 0; i < y; ++i)
+    {
+	nextline();
+	if (nword > 1 || strlen(word[0]) != (x + 7) / 8 * 2)
+	    error("bad BITMAP");
+	for (j = 0; j < x; ++j)
+	{
+	    int c = word[0][j / 4];
+	    if (c >= '0' && c <= '9')
+		c -= '0';
+	    else if (c >= 'A' && c <= 'F')
+		c -= 'A' - 10;
+	    else
+		error("bad hexchar in BITMAP");
+	    if (c & (8 >> (j % 4)))
+		setbit(ch, j, i);
+	}
+    }
+}
+
+
+static void dochar()
+{
+    int ch = -1, x = -1,  y = -1;
+
+    while (nextline())
+    {
+	if (streq(word[0], "ENDCHAR"))
+	    return;
+	else if (streq(word[0], "ENCODING") && nword == 2)
+	{
+	    ch = atoi(word[1]);
+	    if (ch < 0 || ch > 255)
+		error("bad character code %d", ch);
+	}
+	else if (streq(word[0], "BBX") && nword == 5)
+	{
+	    x = atoi(word[1]), y = atoi(word[2]);
+	    if (x < 1 || x > 64 || y < 1 || y > 64)
+		error("bad BBX (%dx%d)", x, y);
+	}
+	else if (streq(word[0], "BITMAP"))
+	{
+	    if (x < 0)
+		error("missing BBX");
+	    if (ch < 0)
+		error("missing ENDCODING");
+	    dobitmap(ch, x, y);
+	}
+    }
+    error("unexpected EOF (missing ENDCHAR)");
+}
+
+
+static void dofile()
+{
+    lineno = 0;
+    w = h = 0;
+    bmap = 0;
+
+    nextline();
+    if (nword != 2 || not streq(word[0], "STARTFONT"))
+	error("not a bdf-file");
+
+    while (nextline())
+    {
+	if (streq(word[0], "ENDFONT"))
+	    return;
+	else if (streq(word[0], "FONTBOUNDINGBOX") && nword == 5)
+	{
+	    if (bmap)
+		error("multiple FONTBOUNDINGBOXes!?!");
+	    w = atoi(word[1]), h = atoi(word[2]);
+	    if (w < 1 || w > 64 || h < 1 || h > 64)
+		error("bad bounding box %dx%d\n", w, h);
+	    bpl = (w*32+7)/8; // rounding is unnecessary
+	    bmap = calloc(1, bpl * h*8);
+	    if (bmap == 0)
+		error("out of memory");
+	}
+	else if (streq(word[0], "STARTCHAR"))
+	{
+	    if (not bmap)
+		error("no FONTBOUNDINGBOX");
+	    dochar();
+	}
+    }
+    error("unexpected EOF (missing ENDFONT)");
+}
+
+
+static void writexbm()
+{
+    char buf[256];
+    int i, j;
+    unsigned char *p = bmap;
+
+    if (not bmap)
+	return;
+
+    sprintf(buf, font, w, h);
+
+    printf("#define %s_width %d\n", buf, 32 * w);
+    printf("#define %s_height %d\n", buf, 8 * h);
+    printf("static unsigned char %s_bits[] = {\n", buf);
+    for (i = 0; i < 16 * h * w / 8; ++i)
+    {
+	for (j = 0; j < 16; ++j)
+	    printf("0x%02x,", *p++);
+	printf("\n");
+    }
+    printf("};\n");
+}
+
+
+int main(int argc, char **argv)
+{
+    if (argc > 1)
+	font = argv[1];
+    dofile();
+    writexbm();
+    exit(0);
+}
-- 
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