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mermaid: limit the size of the masking effect

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This commit is contained in:
Olivier Galibert 2021-06-08 10:14:51 +02:00
parent 682321434f
commit f06d9e8c71
1 changed files with 4 additions and 1 deletions
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5
src/mame/video/mermaid.cpp
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@ -256,12 +256,15 @@ uint32_t mermaid_state::screen_update_mermaid(screen_device &screen, bitmap_ind1
draw_sprites(bitmap, cliprect);
m_bg_tilemap->draw(screen, m_helper_mask, cliprect, 0, 0);
int max_x = cliprect.max_x;
if (max_x >= 26*8)
max_x = 26*8-1;
for (int y = cliprect.min_y; y <= cliprect.max_y; y++)
{
const u16 *s = &m_helper_mask.pix(y, cliprect.min_x);
u16 *p = &bitmap.pix(y, cliprect.min_x);
bool on = false;
for (int x = cliprect.min_x; x <= cliprect.max_x; x++)
for (int x = cliprect.min_x; x <= max_x; x++)
{
if (*s++ & 1)
on = !on;