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I still don't know where it is, but I know where it's not (nw)

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smf- 2018-01-27 17:52:50 +00:00
parent df32deeb6a
commit 663e08afd9
1 changed files with 18 additions and 12 deletions
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30
src/mame/video/popeye.cpp
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@ -451,16 +451,19 @@ uint32_t popeye_state::screen_update_tnx1(screen_device &screen, bitmap_ind16 &b
sy ^= 0x1ff;
sy -= 0x200 - (2 * m_background_pos[1]);
if (sy < 0)
sy = 0; // TODO: find out exactly where the data is fetched from
for (int x = cliprect.min_x; x <= cliprect.max_x; x++)
{
// TODO: confirm the memory layout
int sx = x + (2 * (m_background_pos[0] | ((m_background_pos[2] & 1) << 8))) + 0x70;
int shift = (sx & 0x200) / 0x80;
if (sy < 0)
bitmap.pix16(y, x) = m_bitmapram[0x3f] & 0xf; // TODO: find out exactly where the data is fetched from
else
{
// TODO: confirm the memory layout
int sx = x + (2 * (m_background_pos[0] | ((m_background_pos[2] & 1) << 8))) + 0x70;
int shift = (sx & 0x200) / 0x80;
bitmap.pix16(y, x) = (m_bitmapram[((sx / 8) & 0x3f) + ((sy / 8) * 0x40)] >> shift) & 0xf;
bitmap.pix16(y, x) = (m_bitmapram[((sx / 8) & 0x3f) + ((sy / 8) * 0x40)] >> shift) & 0xf;
}
}
}
@ -483,16 +486,19 @@ uint32_t popeye_state::screen_update_tpp1(screen_device &screen, bitmap_ind16 &b
sy ^= 0x1ff;
sy -= 0x200 - (2 * m_background_pos[1]);
if (sy < 0)
sy = 0; // TODO: find out exactly where the data is fetched from
for (int x = cliprect.min_x; x <= cliprect.max_x; x++)
{
// TODO: confirm the memory layout
int sx = x + (2 * m_background_pos[0]) + 0x70;
int shift = (sy & 4);
if (sy < 0)
bitmap.pix16(y, x) = m_bitmapram[0x3f] & 0xf; // TODO: find out exactly where the data is fetched from
else
{
// TODO: confirm the memory layout
int sx = x + (2 * m_background_pos[0]) + 0x70;
int shift = (sy & 4);
bitmap.pix16(y, x) = (m_bitmapram[((sx / 8) & 0x3f) + ((sy / 8) * 0x40)] >> shift) & 0xf;
bitmap.pix16(y, x) = (m_bitmapram[((sx / 8) & 0x3f) + ((sy / 8) * 0x40)] >> shift) & 0xf;
}
}
}