1 files changed, 71 insertions, 0 deletions
diff --git a/src/pong/ao_pong_text.c b/src/pong/ao_pong_text.c
new file mode 100644
index 00000000..429b5e42
--- /dev/null
+++ b/src/pong/ao_pong_text.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright © 2016 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include "ao.h"
+#include "ao_draw.h"
+#include "ao_draw_int.h"
+#include "ao_pong_text.h"
+
+static const uint16_t numbers[] = {
+#include "ao_pong_font.h"
+};
+
+#define GLYPH_WIDTH	16
+#define GLYPH_SPACING	20
+#define GLYPH_HEIGHT	24
+#define GLYPH_ASCENT	24
+
+const struct ao_font ao_pong_font = {
+	.width = GLYPH_SPACING,
+	.height = GLYPH_HEIGHT,
+	.ascent = GLYPH_ASCENT,
+	.descent = GLYPH_HEIGHT - GLYPH_ASCENT,
+};
+
+void
+ao_pong_text(const struct ao_bitmap	*dst,
+	     int16_t			x,
+	     int16_t			y,
+	     char			*string)
+{
+	static uint32_t	src[GLYPH_HEIGHT];
+	char		c;
+	int		h;
+
+       	struct ao_bitmap	src_bitmap = {
+		.base = src,
+		.stride = 1,
+		.width = GLYPH_WIDTH,
+		.height = GLYPH_HEIGHT
+	};
+
+	y -= GLYPH_ASCENT;
+
+	while ((c = *string++)) {
+		if (c == ' ') {
+			ao_rect(dst, x, y, GLYPH_WIDTH, GLYPH_HEIGHT, 0, AO_COPY);
+		} else {
+			const uint16_t	*n = &numbers[(c - '0') * GLYPH_HEIGHT];
+
+			for (h = 0; h < GLYPH_HEIGHT; h++)
+				src[h] = n[h];
+
+			ao_copy(dst,
+				x, y, GLYPH_WIDTH, GLYPH_HEIGHT,
+				&src_bitmap,
+				0, 0, AO_COPY);
+		}
+		x += GLYPH_SPACING;
+	}
+}