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// license:BSD-3-Clause
// copyright-holders:Phil Stroffolino
/* video/namconb1.c */
#include "emu.h"
#include "includes/namconb1.h"
#include <algorithm>
/* nth_word32 is a general-purpose utility function, which allows us to
* read from 32-bit aligned memory as if it were an array of 16 bit words.
*/
static inline u16
nth_word32(const u32 *source, int which)
{
source += which / 2;
if (which & 1)
{
return (*source) & 0xffff;
}
else
{
return (*source) >> 16;
}
}
/* nth_byte32 is a general-purpose utility function, which allows us to
* read from 32-bit aligned memory as if it were an array of bytes.
*/
static inline u8
nth_byte32(const u32 *pSource, int which)
{
u32 data = pSource[which / 4];
switch (which & 3)
{
case 0: return data >> 24;
case 1: return (data >> 16) & 0xff;
case 2: return (data >> 8) & 0xff;
default: return data & 0xff;
}
} /* nth_byte32 */
void namconb1_state::NB1TilemapCB(u16 code, int *tile, int *mask)
{
*tile = code;
*mask = code;
} /* NB1TilemapCB */
void namconb1_state::NB2TilemapCB_machbrkr(u16 code, int *tile, int *mask)
{
/* 00010203 04050607 00010203 04050607 (normal) */
/* 00010718 191a1b07 00010708 090a0b07 (alt bank) */
int bank = nth_byte32(m_tilebank32, (code >> 13) + 8);
int mangle = (code & 0x1fff) | (bank << 13);
*tile = mangle;
*mask = mangle;
} /* NB2TilemapCB_machbrkr */
void namconb1_state::NB2TilemapCB_outfxies(u16 code, int *tile, int *mask)
{
/* the pixmap index is mangled, the transparency bitmask index is not */
*tile = bitswap<16>(code, 15, 14, 13, 12, 11, 10, 9, 6, 7, 8, 5, 4, 3, 2, 1, 0);
*mask = code;
} /* NB2TilemapCB_outfxies */
void namconb1_state::NB2RozCB_machbrkr(u16 code, int *tile, int *mask, int which)
{
int bank = nth_byte32(&m_rozbank32[which * 8 / 4], (code >> 11) & 0x7);
int mangle = (code & 0x7ff) | (bank << 11);
*tile = mangle;
*mask = mangle;
} /* NB2RozCB_machbrkr */
void namconb1_state::NB2RozCB_outfxies(u16 code, int *tile, int *mask, int which)
{
/* the pixmap index is mangled, the transparency bitmask index is not */
int bank = nth_byte32(&m_rozbank32[which * 8 / 4], (code >> 11) & 0x7);
int mangle = (code & 0x7ff) | (bank << 11);
*mask = mangle;
mangle = bitswap<19>(mangle & 0x7ffff, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 4, 5, 6, 3, 2, 1, 0);
*tile = mangle;
} /* NB2RozCB_outfxies */
void namconb1_state::video_update_common(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int pri;
if (m_c169roz)
{
for (pri = 0; pri < 16; pri++)
{
m_c169roz->draw(screen, bitmap, cliprect, pri);
if ((pri & 1) == 0)
{
m_c123tmap->draw(screen, bitmap, cliprect, pri / 2);
}
m_c355spr->draw(screen, bitmap, cliprect, pri);
}
}
else
{
for (pri = 0; pri < 8; pri++)
{
m_c123tmap->draw(screen, bitmap, cliprect, pri);
m_c355spr->draw(screen, bitmap, cliprect, pri);
}
}
} /* video_update_common */
WRITE_LINE_MEMBER(namconb1_state::screen_vblank)
{
m_c355spr->vblank(state);
if (state)
{
const u32 size = m_spritebank32.bytes() / 4;
std::copy_n(&m_spritebank32[0], size, &m_spritebank32_delayed[0]);
}
}
/************************************************************************************************/
u32 namconb1_state::screen_update_namconb1(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
/* compute window for custom screen blanking */
rectangle clip;
//004a 016a 0021 0101 0144 0020 (nebulas ray)
clip.min_x = int16_t(m_c116->get_reg(0)) - 0x4a;
clip.max_x = int16_t(m_c116->get_reg(1)) - 0x4a - 1;
clip.min_y = int16_t(m_c116->get_reg(2)) - 0x21;
clip.max_y = int16_t(m_c116->get_reg(3)) - 0x21 - 1;
/* intersect with master clip rectangle */
clip &= cliprect;
bitmap.fill(m_c116->black_pen(), cliprect);
video_update_common(screen, bitmap, clip);
return 0;
}
int namconb1_state::NB1objcode2tile(int code)
{
int bank = nth_word32(m_spritebank32_delayed.get(), code >> 11);
return (code & 0x7ff) | (bank << 11);
}
void namconb1_state::video_start()
{
const u32 size = m_spritebank32.bytes() / 4;
m_spritebank32_delayed = make_unique_clear<u32[]>(size);
save_item(NAME(m_tilemap_tile_bank));
save_pointer(NAME(m_spritebank32_delayed), size);
} /* namconb1 */
/****************************************************************************************************/
void namconb1_state::rozbank32_w(offs_t offset, u32 data, u32 mem_mask)
{
u32 old_data = m_rozbank32[offset];
COMBINE_DATA(&m_rozbank32[offset]);
if (m_rozbank32[offset] != old_data)
m_c169roz->mark_all_dirty();
}
u32 namconb1_state::screen_update_namconb2(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
/* compute window for custom screen blanking */
rectangle clip;
//004a016a 00210101 01440020
clip.min_x = m_c116->get_reg(0) - 0x4b;
clip.max_x = m_c116->get_reg(1) - 0x4b - 1;
clip.min_y = m_c116->get_reg(2) - 0x21;
clip.max_y = m_c116->get_reg(3) - 0x21 - 1;
/* intersect with master clip rectangle */
clip &= cliprect;
bitmap.fill(m_c116->black_pen(), cliprect);
if (memcmp(m_tilemap_tile_bank, m_tilebank32, sizeof(m_tilemap_tile_bank)) != 0)
{
m_c123tmap->mark_all_dirty();
memcpy(m_tilemap_tile_bank, m_tilebank32, sizeof(m_tilemap_tile_bank));
}
video_update_common(screen, bitmap, clip);
return 0;
}
int namconb1_state::NB2objcode2tile_machbrkr(int code)
{
int bank = nth_byte32(m_spritebank32_delayed.get(), (code >> 11) & 0xf);
code &= 0x7ff;
code |= bitswap<6>(bank & 0x5f, 6, 4, 3, 2, 1, 0) << 11;
return code;
} /* NB2objcode2tile_machbrkr */
int namconb1_state::NB2objcode2tile_outfxies(int code)
{
int bank = nth_byte32(m_spritebank32_delayed.get(), (code >> 11) & 0xf);
code &= 0x7ff;
code |= bitswap<6>(bank & 0x5f, 6, 4, 3, 1, 2, 0) << 11;
return code;
} /* NB2objcode2tile_outfxies */
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