From: kub <derkub@gmail.com>
Date: Wed, 7 Oct 2020 18:08:22 +0000 (+0200)
Subject: vdp rendering, fix fast-forward graphics
X-Git-Tag: v2.00~679
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3031ff347ae7d46223b8f5141c86dacbc9d64b81;p=picodrive.git

vdp rendering, fix fast-forward graphics
---

diff --git a/pico/draw.c b/pico/draw.c
index 582e35ba..abffdfd7 100644
--- a/pico/draw.c
+++ b/pico/draw.c
@@ -1794,6 +1794,7 @@ PICO_INTERNAL void PicoFrameStart(void)
   int offs = 8, lines = 224;
   int dirty = ((Pico.est.rendstatus & PDRAW_SONIC_MODE) || Pico.m.dirtyPal);
   int sprep = Pico.est.rendstatus & (PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES);
+  int skipped = Pico.est.rendstatus & PDRAW_SKIP_FRAME;
 
   // prepare to do this frame
   Pico.est.rendstatus = 0;
@@ -1813,7 +1814,9 @@ PICO_INTERNAL void PicoFrameStart(void)
       lines, (Pico.video.reg[12] & 1) ? 0 : 1);
     rendstatus_old = Pico.est.rendstatus;
   }
-  if (sprep)
+  if (PicoIn.skipFrame) // preserve this until something is rendered at last
+    Pico.est.rendstatus |= PDRAW_SKIP_FRAME;
+  if (sprep | skipped)
     Pico.est.rendstatus |= PDRAW_PARSE_SPRITES;
 
   Pico.est.HighCol = HighColBase + offs * HighColIncrement;
diff --git a/pico/pico.h b/pico/pico.h
index 3c800f6a..d04ff503 100644
--- a/pico/pico.h
+++ b/pico/pico.h
@@ -208,6 +208,7 @@ void PicoDoHighPal555(int sh, int line, struct PicoEState *est);
 #define PDRAW_SHHI_DONE     (1<<7) // layer sh/hi already processed
 #define PDRAW_32_COLS       (1<<8) // 32 column mode
 #define PDRAW_BORDER_32     (1<<9) // center H32 in buffer (32 px border)
+#define PDRAW_SKIP_FRAME   (1<<10) // frame is skipped
 extern int rendstatus_old;
 extern int rendlines;