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cave graphics fix (nw)

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This commit is contained in:
Olivier Galibert 2018-02-24 21:09:24 +01:00
parent 0aad1f7e18
commit 94322a95f8
2 changed files with 19 additions and 2 deletions
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20
src/mame/drivers/cave.cpp
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@ -2947,6 +2947,22 @@ void cave_state::unpack_sprites(int chip)
} }
/* 4 bits -> 8 bits. Even and odd pixels are not swapped */
void cave_state::ddp_unpack_sprites(int chip)
{
const uint32_t len = m_spriteregion[chip]->bytes();
uint8_t *rgn = m_spriteregion[chip]->base();
uint8_t *src = rgn + len / 2 - 1;
uint8_t *dst = rgn + len - 1;
while(dst > src)
{
uint8_t data = *src--;
*dst-- = data & 0xf; *dst-- = data >> 4;
}
}
/* 2 pages of 4 bits -> 8 bits */ /* 2 pages of 4 bits -> 8 bits */
void cave_state::esprade_unpack_sprites(int chip) void cave_state::esprade_unpack_sprites(int chip)
{ {
@ -5155,7 +5171,7 @@ DRIVER_INIT_MEMBER(cave_state,ddonpach)
{ {
init_cave(); init_cave();
unpack_sprites(0); ddp_unpack_sprites(0);
m_spritetype[0] = 1; // "different" sprites (no zooming?) m_spritetype[0] = 1; // "different" sprites (no zooming?)
m_time_vblank_irq = 90; m_time_vblank_irq = 90;
} }
@ -5164,7 +5180,7 @@ DRIVER_INIT_MEMBER(cave_state,donpachi)
{ {
init_cave(); init_cave();
unpack_sprites(0); ddp_unpack_sprites(0);
m_spritetype[0] = 1; // "different" sprites (no zooming?) m_spritetype[0] = 1; // "different" sprites (no zooming?)
m_time_vblank_irq = 90; m_time_vblank_irq = 90;
} }

1
src/mame/includes/cave.h
View File

@ -258,6 +258,7 @@ public:
DECLARE_WRITE_LINE_MEMBER(sound_irq_gen); DECLARE_WRITE_LINE_MEMBER(sound_irq_gen);
void update_irq_state(); void update_irq_state();
void unpack_sprites(int chip); void unpack_sprites(int chip);
void ddp_unpack_sprites(int chip);
void esprade_unpack_sprites(int chip); void esprade_unpack_sprites(int chip);
void sailormn_unpack_tiles(int chip); void sailormn_unpack_tiles(int chip);