Vertical mirroring support for sprites

diff --git a/GBVideo.cc b/GBVideo.cc
index b9d7076fe349a9554987640a597d329e762bdaab..ec24a202d60fc827f48031e54a0030085ec38681 100644 (file)
--- a/GBVideo.cc
+++ b/GBVideo.cc
@@ -392,7 +392,6 @@ void GBVideo::draw()
 
                        //logger.trace("LY=",LY," sprites=",v.size());
                        // draw sprites
-                       u16 tile_data_addr = 0x0000;
                        int cur_x = 0;
                        for (u32 i=0; i<v.size() && i<10 ; i++)
                        {
@@ -401,7 +400,8 @@ void GBVideo::draw()
                                int sprite_y = LY - (v[i].y - 16);
                                bool mirror_x = check_bit(v[i].flags, 5);
                                bool mirror_y = check_bit(v[i].flags, 6);
-                               int mx, my;
+
+                               if (mirror_y) sprite_y = 15-sprite_y;
 
                                int current_tile_index = v[i].tile;
                                        logger.trace("sprite #", i, 
@@ -427,7 +427,7 @@ void GBVideo::draw()
                                u8 current_row_high = VRAM[current_tile_addr+2*sprite_y+1];
                                for (int x=sprite_x; x < 8; x++)
                                {
-                                       mx = !mirror_x? 7-x : x;
+                                       int mx = mirror_x? x : 7-x;
                                        u8 color = ((current_row_high >> mx)&1) << 1 | 
                                                                ((current_row_low >> mx)&1);