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mindset: Fix transparent blit [O. Galibert]

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This commit is contained in:
Olivier Galibert 2019-08-21 13:28:35 +02:00
parent 37d1ac2d83
commit 5c0308fc9b
1 changed files with 17 additions and 8 deletions
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25
src/mame/drivers/mindset.cpp
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@ -426,6 +426,8 @@ void mindset_state::dispreg_w(u16 data)
}
}
u16 vram2[0x8000];
u32 mindset_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
// Temporary gross hack
@ -437,6 +439,13 @@ u32 mindset_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, co
int pixels_per_byte_order = (m_dispctrl & 0x0600) >> 9;
bool large_pixels = m_dispctrl & 0x0100;
if (machine().input().code_pressed(KEYCODE_O)) {
for(int i=0; i<0x8000; i++)
vram2[i] = m_maincpu->space(AS_PROGRAM).read_word(0x26470+2*i);
bank = vram2;
}
bitmap.fill(m_palette[m_borderidx]);
int dx = ((m_screenpos >> 8) & 15) * (751 - 640) / 15;
@ -801,25 +810,25 @@ void mindset_state::blit(u16 packet_seg, u16 packet_adr)
u16 tmask;
switch((mode >> 11) & 3) {
case 0:
tmask = dst;
tmask = src;
break;
case 1:
tmask = (dst >> 1) | dst;
tmask = (src >> 1) | src;
tmask = (tmask & 0x5555) * 0x3;
break;
case 2:
tmask = (dst >> 2) | dst;
tmask = (dst >> 1) | dst;
tmask = (src >> 2) | src;
tmask = (tmask >> 1) | tmask;
tmask = (tmask & 0x1111) * 0xf;
break;
case 3:
tmask = (dst >> 4) | dst;
tmask = (dst >> 2) | dst;
tmask = (dst >> 1) | dst;
tmask = (src >> 4) | src;
tmask = (tmask >> 2) | tmask;
tmask = (tmask >> 1) | tmask;
tmask = (tmask & 0x0101) * 0xff;
break;
}
cmask &= ~tmask;
cmask &= tmask;
}
res = (dst & ~cmask) | (res & cmask);