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GPU: Fix incorrect handling of check mask bit

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Fixes boxes in Silent Hill in Software Renderer.
This commit is contained in:
Connor McLaughlin
2020-03-06 00:29:35 +10:00
parent d46d681179
commit f9a298f1b7
3 changed files with 14 additions and 6 deletions
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14
src/core/gpu.h
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@ -390,9 +390,17 @@ protected:
return ((bits & MASK) == MASK);
}
// During transfer/render operations, if ((dst_pixel & mask_and) == mask_and) { pixel = src_pixel | mask_or }
u16 GetMaskAND() const { return check_mask_before_draw ? 0x8000 : 0x0000; }
u16 GetMaskOR() const { return set_mask_while_drawing ? 0x8000 : 0x0000; }
// During transfer/render operations, if ((dst_pixel & mask_and) == 0) { pixel = src_pixel | mask_or }
u16 GetMaskAND() const
{
// return check_mask_before_draw ? 0x8000 : 0x0000;
return Truncate16((bits << 3) & 0x8000);
}
u16 GetMaskOR() const
{
// return set_mask_while_drawing ? 0x8000 : 0x0000;
return Truncate16((bits << 4) & 0x8000);
}
} m_GPUSTAT = {};
struct DrawMode