Initial import.

src/libdraw/getdefont.c

@@ -0,0 +1,60 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+
+Subfont*
+getdefont(Display *d)
+{
+	char *hdr, *p;
+	int n;
+	Fontchar *fc;
+	Subfont *f;
+	int ld;
+	Rectangle r;
+	Image *i;
+
+	/*
+	 * make sure data is word-aligned.  this is true with Plan 9 compilers
+	 * but not in general.  the byte order is right because the data is
+	 * declared as char*, not ulong*.
+	 */
+	p = (char*)defontdata;
+	n = (ulong)p & 3;
+	if(n != 0){
+		memmove(p+(4-n), p, sizeofdefont-n);
+		p += 4-n;
+	}
+	ld = atoi(p+0*12);
+	r.min.x = atoi(p+1*12);
+	r.min.y = atoi(p+2*12);
+	r.max.x = atoi(p+3*12);
+	r.max.y = atoi(p+4*12);
+
+	i = allocimage(d, r, drawld2chan[ld], 0, 0);
+	if(i == 0)
+		return 0;
+
+	p += 5*12;
+	n = loadimage(i, r, (uchar*)p, (defontdata+sizeofdefont)-(uchar*)p);
+	if(n < 0){
+		freeimage(i);
+		return 0;
+	}
+
+	hdr = p+n;
+	n = atoi(hdr);
+	p = hdr+3*12;
+	fc = malloc(sizeof(Fontchar)*(n+1));
+	if(fc == 0){
+		freeimage(i);
+		return 0;
+	}
+	_unpackinfo(fc, (uchar*)p, n);
+	f = allocsubfont("*default*", n, atoi(hdr+12), atoi(hdr+24), fc, i);
+	if(f == 0){
+		freeimage(i);
+		free(fc);
+		return 0;
+	}
+	return f;
+}