Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-05-10 08:12:13 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

ygv608.cpp: small changes

Browse Source
This commit is contained in:
Agiri 2017-12-30 22:39:48 +09:00
parent 5563422a6c
commit d301a89fb2
1 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
src/mame/video/ygv608.cpp
View File

@ -1032,20 +1032,21 @@ inline void ygv608_device::draw_layer_roz(screen_device &screen, bitmap_ind16 &b
void ygv608_device::ygv608_draw_mosaic(bitmap_ind16 &bitmap, const rectangle &cliprect, int n) void ygv608_device::ygv608_draw_mosaic(bitmap_ind16 &bitmap, const rectangle &cliprect, int n)
{ {
int x, y, x0, y0; int x, y, mask;
if (n <= 0) if (n <= 0)
{ {
return; return;
} }
// mask to drop the lowest n-bits
mask = ~((1 << n) - 1);
for (y = cliprect.min_y; y <= cliprect.max_y; y++) for (y = cliprect.min_y; y <= cliprect.max_y; y++)
{ {
for (x = cliprect.min_x; x <= cliprect.max_x; x++) for (x = cliprect.min_x; x <= cliprect.max_x; x++)
{ {
x0 = (x >> n) << n; bitmap.pix16(y, x) = bitmap.pix16(y & mask, x & mask);
y0 = (y >> n) << n;
bitmap.pix16(y, x) = bitmap.pix16(y0, x0);
} }
} }
} }