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fix cell scroll drawing
[picodrive.git]
/
pico
/
draw.c
diff --git
a/pico/draw.c
b/pico/draw.c
index
6408f20
..
bb051b6
100644
(file)
--- a/
pico/draw.c
+++ b/
pico/draw.c
@@
-261,7
+261,11
@@
static void DrawStripVSRam(struct TileStrip *ts, int plane_sh, int cellskip)
// Draw tiles across screen:
\r
tilex=(-ts->hscroll)>>3;
\r
dx=((ts->hscroll-1)&7)+1;
\r
// Draw tiles across screen:
\r
tilex=(-ts->hscroll)>>3;
\r
dx=((ts->hscroll-1)&7)+1;
\r
- if(dx != 8) cell--; // have hscroll, start with negative cell
\r
+ if (ts->hscroll & 0x0f) {
\r
+ int adj = ((ts->hscroll ^ dx) >> 3) & 1;
\r
+ cell -= adj + 1;
\r
+ ts->cells -= adj;
\r
+ }
\r
cell+=cellskip;
\r
tilex+=cellskip;
\r
dx+=cellskip<<3;
\r
cell+=cellskip;
\r
tilex+=cellskip;
\r
dx+=cellskip<<3;
\r