1 files changed, 119 insertions, 0 deletions
diff --git a/src/draw/ao_draw.h b/src/draw/ao_draw.h
new file mode 100644
index 00000000..92150fc1
--- /dev/null
+++ b/src/draw/ao_draw.h
@@ -0,0 +1,119 @@
+/*
+ * 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.
+ */
+
+#ifndef _AO_DRAW_H_
+#define _AO_DRAW_H_
+
+struct ao_bitmap {
+	uint32_t	*base;
+	int16_t		stride;	/* in units */
+	int16_t		width;	/* in pixels */
+	int16_t		height;	/* in pixels */
+};
+
+struct ao_pattern {
+	uint8_t		pattern[8];
+};
+
+void
+ao_copy(const struct ao_bitmap	*dst,
+	int16_t			dst_x,
+	int16_t			dst_y,
+	int16_t			width,
+	int16_t			height,
+	const struct ao_bitmap	*src,
+	int16_t			src_x,
+	int16_t			src_y,
+	uint8_t			rop);
+
+void
+ao_rect(const struct ao_bitmap	*dst,
+	int16_t			x,
+	int16_t			y,
+	int16_t			width,
+	int16_t			height,
+	uint32_t		fill,
+	uint8_t			rop);
+
+void
+ao_pattern(const struct ao_bitmap	*dst,
+	   int16_t			x,
+	   int16_t			y,
+	   int16_t			width,
+	   int16_t			height,
+	   const struct ao_pattern	*pattern,
+	   int16_t			pat_x,
+	   int16_t			pat_y,
+	   uint8_t			rop);
+
+void
+ao_line(const struct ao_bitmap	*dst,
+	int16_t			x1,
+	int16_t			y1,
+	int16_t			x2,
+	int16_t			y2,
+	uint32_t		fill,
+	uint8_t			rop);
+
+void
+ao_text(const struct ao_bitmap	*dst,
+	int16_t			x,
+	int16_t			y,
+	char			*string,
+	uint32_t		fill,
+	uint8_t			rop);
+
+struct ao_font {
+	int	width;
+	int	height;
+	int	ascent;
+	int	descent;
+};
+
+extern const struct ao_font ao_font;
+
+#define AO_SHIFT	5
+#define AO_UNIT		(1 << AO_SHIFT)
+#define AO_MASK		(AO_UNIT - 1)
+#define AO_ALLONES	((uint32_t) -1)
+
+/*
+ *	    dst
+ *	   0   1
+ *
+ *	0  a   b
+ *  src
+ *	1  c   d
+ *
+ *	ROP = abcd
+ */
+
+#define AO_CLEAR         0x0	/* 0 */
+#define AO_AND           0x1	/* src AND dst */
+#define AO_AND_REVERSE   0x2	/* src AND NOT dst */
+#define AO_COPY          0x3	/* src */
+#define AO_AND_INVERTED  0x4	/* NOT src AND dst */
+#define AO_NOOP          0x5	/* dst */
+#define AO_XOR           0x6	/* src XOR dst */
+#define AO_OR            0x7	/* src OR dst */
+#define AO_NOR           0x8	/* NOT src AND NOT dst */
+#define AO_EQUIV         0x9	/* NOT src XOR dst */
+#define AO_INVERT        0xa	/* NOT dst */
+#define AO_OR_REVERSE    0xb	/* src OR NOT dst */
+#define AO_COPY_INVERTED 0xc	/* NOT src */
+#define AO_OR_INVERTED   0xd	/* NOT src OR dst */
+#define AO_NAND          0xe	/* NOT src OR NOT dst */
+#define AO_SET           0xf	/* 1 */
+
+#endif /* _AO_DRAW_H_ */