Added support for text rotation modes to textmode interface

1 files changed, 19 insertions, 8 deletions

diff --git a/source/textmode.c b/source/textmode.c
index aa6de44..0de43f6 100644
--- a/source/textmode.c
+++ b/source/textmode.c
@@ -54,15 +54,26 @@ static inline void Plot_Text(int x, int y, int c)
 
 static inline void Plot_RS(int x, int y, int c)
 {
-    int xw;
-    int yw;
+    uint16 ch;
+    int odd;
+    uint16 *off;
 
-    xw = x/32;
-    yw = y/32;
-    x %= 32;
-    y %= 32;
+    odd = x&1;
 
-    *(text + x + y*32 + (xw+yw) * 1024) = c;
+    off = text + x/2 + y*mapw/2;
+
+    ch = *off;
+
+    if (odd)
+    {
+    	ch = (c<<8) | (ch&0xff);
+    }
+    else
+    {
+    	ch = c | (ch&0xff00);
+    }
+
+    *off = ch;
 }
 
 
@@ -97,7 +108,7 @@ void TM_Init(uint16 *vram, int map_width, int map_height, int map_is_rotation)
 
     is_rot = map_is_rotation;
 
-    draw_string = map_is_rotation ? Text_Put : RS_Put;
+    draw_string = map_is_rotation ? RS_Put : Text_Put;
 
     TM_Cls();
 }