1 files changed, 81 insertions, 0 deletions
diff --git a/font.c b/font.c
new file mode 100644
index 0000000..99301b5
--- /dev/null
+++ b/font.c
@@ -0,0 +1,81 @@
+/*
+ * (C)opyright MMIV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
+ * See LICENSE file for license details.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <locale.h>
+
+unsigned int
+textwidth_l(BlitzFont *font, char *text, unsigned int len)
+{
+	if(font->set) {
+		XRectangle r;
+		XmbTextExtents(font->set, text, len, nil, &r);
+		return r.width;
+	}
+	return XTextWidth(font->xfont, text, len);
+}
+
+unsigned int
+textwidth(BlitzFont *font, char *text)
+{
+	return blitz_textwidth_l(font, text, strlen(text));
+}
+
+void
+loadfont(Blitz *blitz, BlitzFont *font)
+{
+	char *fontname = font->fontstr;
+	char **missing = nil, *def = "?";
+	int n;
+
+	setlocale(LC_ALL, "");
+	if(font->set)
+		XFreeFontSet(blitz->dpy, font->set);
+	font->set = XCreateFontSet(blitz->dpy, fontname, &missing, &n, &def);
+	if(missing) {
+		while(n--)
+			fprintf(stderr, "liblitz: missing fontset: %s\n", missing[n]);
+		XFreeStringList(missing);
+		if(font->set) {
+			XFreeFontSet(blitz->dpy, font->set);
+			font->set = nil;
+		}
+	}
+	if(font->set) {
+		XFontSetExtents *font_extents;
+		XFontStruct **xfonts;
+		char **font_names;
+		unsigned int i;
+
+		font->ascent = font->descent = 0;
+		font_extents = XExtentsOfFontSet(font->set);
+		n = XFontsOfFontSet(font->set, &xfonts, &font_names);
+		for(i = 0, font->ascent = 0, font->descent = 0; i < n; i++) {
+			if(font->ascent < (*xfonts)->ascent)
+				font->ascent = (*xfonts)->ascent;
+			if(font->descent < (*xfonts)->descent)
+				font->descent = (*xfonts)->descent;
+			xfonts++;
+		}
+	}
+	else {
+		if(font->xfont)
+			XFreeFont(blitz->dpy, font->xfont);
+		font->xfont = nil;
+		font->xfont = XLoadQueryFont(blitz->dpy, fontname);
+		if (!font->xfont) {
+			fontname = "fixed";
+			font->xfont = XLoadQueryFont(blitz->dpy, fontname);
+		}
+		if (!font->xfont) {
+			fprintf(stderr, "%s", "liblitz: error, cannot load 'fixed' font\n");
+			exit(1);
+		}
+		font->ascent = font->xfont->ascent;
+		font->descent = font->xfont->descent;
+	}
+}