X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Fgame_em%2Fdisplay.h;h=f6a82af453c8a13991d8dd0b85a5331b8fa2cb8f;hb=3e71d06e9a97be7bb8c50c76717d08e5c46e0cc8;hp=70728a7e3ff84593b4e19e394d4e0856c4658f42;hpb=86e1890b2d87dd7710b320e2b306c7291d41e2a5;p=rocksndiamonds.git

diff --git a/src/game_em/display.h b/src/game_em/display.h
index 70728a7e..f6a82af4 100644
--- a/src/game_em/display.h
+++ b/src/game_em/display.h
@@ -41,8 +41,23 @@
 #define SXSIZE			(SCR_FIELDX * TILEX)
 #define SYSIZE			(SCR_FIELDY * TILEY)
 
-#define DISPLAY_TIME(x)		(((x) * 8 + 49) / 50)
+#if 1
+#define FRAMES_PER_SECOND	50
+
+#define ROUNDED_DIVIDE(x, y)	(((x) + (y) - 1) / (y))
+
+#define SECONDS_TO_FRAMES(x)	((x) * FRAMES_PER_SECOND)
+#define FRAMES_TO_SECONDS(x)	((x) / FRAMES_PER_SECOND)
+
+#define SECONDS_TO_CYCLES(x)	ROUNDED_DIVIDE((x) * FRAMES_PER_SECOND, 8)
+#define CYCLES_TO_SECONDS(x)	ROUNDED_DIVIDE((x) * 8, FRAMES_PER_SECOND)
 
+#define DISPLAY_TIME(x)		ROUNDED_DIVIDE(x, FRAMES_PER_SECOND)
+
+#else
+
+#define DISPLAY_TIME(x)		(((x) * 8 + 49) / 50)
+#endif
 
 extern Bitmap *screenBitmap;
 extern Bitmap *scoreBitmap;