[uae] Re: SDL speedup
- From: blynel@xxxxxxxxxx
- To: uae@xxxxxxxxxxxxx
- Date: Sat, 13 Nov 2004 00:21:28 +0100
...and of course there was an error - aaargh!
Sorry guys!
Here is the correct patch
--- sdlgfx.c 2004-10-26 07:42:20.000000000 +0200
+++ sdlgfx.c.new 2004-11-13 00:12:29.968616112 +0100
@@ -131,22 +131,39 @@
/* Not implemented for SDL output */
}
+static int pending_flush = 0;
+static int ystart_p, ystop_p;
+
void flush_block (int ystart, int ystop)
{
DEBUG_LOG ("Function: flush_block %d %d\n", ystart, ystop);
- SDL_UnlockSurface (prSDLScreen);
- SDL_UpdateRect (prSDLScreen, 0, ystart, current_width, ystop - ystart + 1);
- SDL_LockSurface (prSDLScreen);
+ if (pending_flush) {
+ if (ystart <= ystop_p + 2) {
+ /* merge with pending flush */
+ ystop_p = ystop;
+ } else {
+ /* do previous pending flush and make this flush pending */
+ SDL_UpdateRect (prSDLScreen, 0, ystart_p, current_width, ystop_p -
ystart_p + 1);
+ ystart_p = ystart;
+ ystop_p = ystop;
+ }
+ } else {
+ /* make this flush pending */
+ ystart_p = ystart;
+ ystop_p = ystop;
+ pending_flush = 1;
+ }
}
void flush_screen (int ystart, int ystop)
{
DEBUG_LOG ("Function: flush_screen\n");
-#if 0
- SDL_UpdateRect(prSDLScreen, 0, 0, current_width, current_height);
-#endif
+ if (pending_flush) {
+ SDL_UpdateRect (prSDLScreen, 0, ystart_p, current_width, ystop_p -
ystart_p + 1);
+ pending_flush = 0;
+ }
}
void flush_clear_screen (void)
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