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video/upd7220.cpp: bump scissor cutout for graphic layer when interlace mode is on

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* fix microbx2 regression
This commit is contained in:
angelosa 2024-11-02 22:35:49 +01:00
parent 5c4f07ffb9
commit e46068ba88
1 changed files with 5 additions and 3 deletions
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8
src/devices/video/upd7220.cpp
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@ -1812,7 +1812,7 @@ void upd7220_device::update_graphics(bitmap_rgb32 &bitmap, const rectangle &clip
int im, wd;
int y = 0, tsy = 0, bsy = 0;
int mixed = ((m_mode & UPD7220_MODE_DISPLAY_MASK) == UPD7220_MODE_DISPLAY_MIXED) ? 1 : 0;
uint8_t interlace = ((m_mode & UPD7220_MODE_INTERLACE_MASK) == UPD7220_MODE_INTERLACE_ON) ? 0 : 1;
uint8_t interlace = ((m_mode & UPD7220_MODE_INTERLACE_MASK) == UPD7220_MODE_INTERLACE_ON) ? 1 : 0;
uint8_t zoom = m_disp + 1;
for(int area = 0; area < 4; area++)
@ -1835,7 +1835,7 @@ void upd7220_device::update_graphics(bitmap_rgb32 &bitmap, const rectangle &clip
if (len == 0)
len = 0x400;
if(!interlace)
if(interlace)
len <<= 1;
for(y = 0; y < len; y++)
@ -1848,7 +1848,9 @@ void upd7220_device::update_graphics(bitmap_rgb32 &bitmap, const rectangle &clip
for(int z = 0; z <= m_disp; ++z)
{
int yval = (y*zoom)+z + (bsy + m_vbp);
if(yval <= cliprect.bottom() && (yval - m_vbp) < m_al)
// pc9801:duel sets up bitmap layer with height 384 vs. 400 of text layer
// so we scissor here, interlace wants it bumped x2 (microbx2)
if(yval <= cliprect.bottom() && (yval - m_vbp) < m_al << interlace)
draw_graphics_line(bitmap, addr, yval, wd, mixed);
}
}