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pacland.cpp: Changed to approach real hardware behavior (#3998)

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* Update pacland.h

* Update pacland.cpp
This commit is contained in:
kunikuni 2018-09-14 20:57:35 +09:00 committed by hap
parent c56e8d8b83
commit 213ea7c969
2 changed files with 23 additions and 27 deletions
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3
src/mame/includes/pacland.h
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@ -40,8 +40,7 @@ public:
tilemap_t *m_bg_tilemap;
tilemap_t *m_fg_tilemap;
bitmap_ind16 m_fg_bitmap;
bitmap_ind16 m_sprite1_bitmap;
bitmap_ind16 m_sprite2_bitmap;
bitmap_ind16 m_sprite_bitmap;
std::unique_ptr<uint32_t[]> m_transmask[3];
uint16_t m_scroll0;
uint16_t m_scroll1;

47
src/mame/video/pacland.cpp
View File

@ -122,7 +122,7 @@ PALETTE_INIT_MEMBER(pacland_state, pacland)
int palentry;
/* start with no transparency */
m_transmask[0][i] = m_transmask[1][i] = m_transmask[2][i] = 0;
m_transmask[0][i] = m_transmask[1][i] = m_transmask[2][i] = 0;
/* iterate over all palette entries except the last one */
for (palentry = 0; palentry < 0x100; palentry++)
@ -189,8 +189,7 @@ TILE_GET_INFO_MEMBER(pacland_state::get_fg_tile_info)
void pacland_state::video_start()
{
m_screen->register_screen_bitmap(m_sprite1_bitmap);
m_screen->register_screen_bitmap(m_sprite2_bitmap);
m_screen->register_screen_bitmap(m_sprite_bitmap);
m_screen->register_screen_bitmap(m_fg_bitmap);
m_fg_bitmap.fill(0xffff);
@ -380,32 +379,30 @@ uint32_t pacland_state::screen_update(screen_device &screen, bitmap_ind16 &bitma
draw_fg(screen, bitmap, cliprect, 0);
/* draw sprites with regular transparency */
m_sprite1_bitmap.fill(0, cliprect);
draw_sprites(screen, m_sprite1_bitmap, cliprect, flip, 1);
copybitmap_trans(bitmap, m_sprite1_bitmap, 0, 0, 0, 0, cliprect, 0);
draw_sprites(screen, bitmap, cliprect, flip, 1);
/* draw sprite pixels in a temporary bitmap with colortable values >= 0xf0 */
m_sprite_bitmap.fill(0, cliprect);
draw_sprites(screen, m_sprite_bitmap, cliprect, flip, 2);
for (int y = cliprect.min_y; y <= cliprect.max_y; y++)
{
uint16_t *spr = &m_sprite_bitmap.pix16(y);
uint16_t *bmp = &bitmap.pix16(y);
for (int x = cliprect.min_x; x <= cliprect.max_x; x++)
{
/* clear to 0 if "m_sprite_bitmap" and "bitmap" are different,
because not redraw pixels that are not visible in "bitmap"
in this way, keep sprite-sprite priorities intact */
if (spr[x] != 0 && spr[x] != bmp[x])
spr[x] = 0;
}
}
/* draw high priority fg tiles */
draw_fg(screen, bitmap, cliprect, 1);
/* draw sprite pixels with colortable values >= 0xf0, which have priority over all fg tiles */
m_sprite2_bitmap.fill(0, cliprect);
draw_sprites(screen, m_sprite2_bitmap, cliprect, flip, 2);
for (int y = cliprect.min_y; y <= cliprect.max_y; y++)
{
uint16_t *src1 = &m_sprite1_bitmap.pix16(y);
uint16_t *src2 = &m_sprite2_bitmap.pix16(y);
uint16_t *dst = &bitmap.pix16(y);
for (int x = cliprect.min_x; x <= cliprect.max_x; x++)
{
/* only copy if "m_sprite1_bitmap" and "m_sprite2_bitmap" are same value,
because not redraw pixels that are not visible in "m_sprite1_bitmap" */
uint16_t pix1 = src1[x];
uint16_t pix2 = src2[x];
if (pix2 != 0 && dst[x] < 0x800 && pix1 == pix2)
dst[x] = pix2;
}
}
/* draw sprite pixels with colortable values >= 0xf0, which have priority over everything */
copybitmap_trans(bitmap, m_sprite_bitmap, 0, 0, 0, 0, cliprect, 0);
return 0;
}