altos/draw: Add damage tracking

[fw/altos] / src / draw / ao_draw_int.h

diff --git a/src/draw/ao_draw_int.h b/src/draw/ao_draw_int.h
index f353526d338be7558909cce1f2ec416eba7283f3..cd7be34eb5e8b427e5d9c4c10b9965e726161337 100644 (file)
--- a/src/draw/ao_draw_int.h
+++ b/src/draw/ao_draw_int.h
@@ -94,6 +94,18 @@ ao_bits_mask(int16_t x, int16_t w) {
                }                               \
        } while (0)
 
+static inline int16_t
+ao_min16(int16_t a, int16_t b)
+{
+       return a < b ? a : b;
+}
+
+static inline int16_t
+ao_max16(int16_t a, int16_t b)
+{
+       return a > b ? a : b;
+}
+
 static inline uint32_t
 ao_do_mask_rrop(uint32_t dst, uint32_t and, uint32_t xor, uint32_t mask) {
        return (dst & (and | ~mask)) ^ (xor & mask);
@@ -104,6 +116,16 @@ ao_do_rrop(uint32_t dst, uint32_t and, uint32_t xor) {
        return (dst & and) ^ xor;
 }
 
+static inline void
+ao_damage(struct ao_bitmap     *dst,
+         int16_t               x1,
+         int16_t               y1,
+         int16_t               x2,
+         int16_t               y2)
+{
+       ao_box_union(&dst->damage, x1, y1, x2, y2);
+}
+
 void
 ao_blt(uint32_t                *src_line,
        int16_t         src_stride,