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xexex.cpp : Implement blend enable flag (#6374)

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* xexex.cpp : Implement blend enable flag

* xexex.cpp : Add notes
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cam900 2020-03-02 12:07:19 +09:00 committed by GitHub
parent 198f9b2806
commit e116b72bc9
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 15 additions and 3 deletions
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18
src/mame/video/xexex.cpp
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@ -25,6 +25,14 @@ K053246_CB_MEMBER(xexex_state::sprite_callback)
K056832_CB_MEMBER(xexex_state::tile_callback)
{
/*
Color format
xxxx ---- Color
---- -x-- Alpha blend enable
---- --x- Used, Unknown
Everything else : unknown
*/
*priority = *color & 1; // alpha flag
*color = m_layer_colorbase[layer] | (*color >> 2 & 0x0f);
}
@ -85,7 +93,11 @@ uint32_t xexex_state::screen_update_xexex(screen_device &screen, bitmap_rgb32 &b
}
else if (!m_cur_alpha || layer[plane] != 1)
{
m_k056832->tilemap_draw(screen, bitmap, cliprect, layer[plane], 0, 1 << plane);
m_k056832->tilemap_draw(screen, bitmap, cliprect, layer[plane], TILEMAP_DRAW_ALL_CATEGORIES, 1 << plane);
}
else
{
m_k056832->tilemap_draw(screen, bitmap, cliprect, layer[plane], TILEMAP_DRAW_CATEGORY(0), 1 << plane);
}
}
@ -97,10 +109,10 @@ uint32_t xexex_state::screen_update_xexex(screen_device &screen, bitmap_rgb32 &b
if (alpha > 0)
{
m_k056832->tilemap_draw(screen, bitmap, cliprect, 1, TILEMAP_DRAW_ALPHA(alpha), 0);
m_k056832->tilemap_draw(screen, bitmap, cliprect, 1, TILEMAP_DRAW_ALPHA(alpha) | TILEMAP_DRAW_CATEGORY(1), 0);
}
}
m_k056832->tilemap_draw(screen, bitmap, cliprect, 0, 0, 0);
m_k056832->tilemap_draw(screen, bitmap, cliprect, 0, TILEMAP_DRAW_ALL_CATEGORIES, 0);
return 0;
}