altos/draw: Add a reasonable API for drawing, add lines.

[fw/altos] / src / drivers / ao_vga.h

diff --git a/src/drivers/ao_vga.h b/src/drivers/ao_vga.h
index caec8f481c802a36522c2c9a71c9dc9b692b2266..31b3a4f7491399f1f486fdd1248b72c905465270 100644 (file)
--- a/src/drivers/ao_vga.h
+++ b/src/drivers/ao_vga.h
@@ -23,11 +23,22 @@ ao_vga_init(void);
 void
 ao_vga_enable(int active);
 
+/* Active frame buffer */
 #define AO_VGA_WIDTH           320
 #define AO_VGA_HEIGHT          240
-#define AO_VGA_PAD             64
-#define AO_VGA_STRIDE          ((AO_VGA_WIDTH + AO_VGA_PAD) >> AO_SHIFT)
 
-extern uint32_t        ao_vga_fb[AO_VGA_STRIDE * AO_VGA_HEIGHT];
+/* Pad on the right so that there are zeros on the output after the line */
+#define AO_VGA_HPAD            64
+
+/* Pad above so there's a scanline of zeros before the screen starts */
+#define AO_VGA_VPAD            1
+
+#define AO_VGA_STRIDE          ((AO_VGA_WIDTH + AO_VGA_HPAD) >> AO_SHIFT)
+
+extern uint32_t        ao_vga_fb_all[AO_VGA_STRIDE * (AO_VGA_HEIGHT + AO_VGA_VPAD)];
+
+#define ao_vga_fb              (ao_vga_fb_all + AO_VGA_STRIDE)
+
+extern const struct ao_bitmap ao_vga_bitmap;
 
 #endif /* _AO_VGA_H_ */