// license:BSD-3-Clause
// copyright-holders:David Haywood, Phil Stroffolino, Carlos A. Lozano
/***************************************************************************
Armed Formation video emulation
***************************************************************************/
#include "emu.h"
#include "includes/armedf.h"
/***************************************************************************
Callbacks for the TileMap code
***************************************************************************/
TILEMAP_MAPPER_MEMBER(armedf_state::armedf_scan_type1)
{ /* col: 0..63; row: 0..31 */
/* armed formation */
return col * 32 + row;
}
TILEMAP_MAPPER_MEMBER(armedf_state::armedf_scan_type2)
{ /* col: 0..63; row: 0..31 */
return 32 * (31 - row) + (col & 0x1f) + 0x800 * (col / 32);
}
TILEMAP_MAPPER_MEMBER(armedf_state::armedf_scan_type3)
{ /* col: 0..63; row: 0..31 */
/* legion & legiono */
return (col & 0x1f) * 32 + row + 0x800 * (col / 32);
}
TILE_GET_INFO_MEMBER(armedf_state::get_nb1414m4_tx_tile_info)
{
u8 tile_number = m_text_videoram[tile_index] & 0xff;
u8 attributes;
/* TODO: Armed F doesn't seem to use the NB1414M4! */
//if (m_scroll_type == 1)
// attributes = m_text_videoram[tile_index + 0x800] & 0xff;
//else
{
attributes = m_text_videoram[tile_index + 0x400] & 0xff;
// TODO: skip drawing the NB1414M4 params, how the HW actually handles this?
if (tile_index < 0x12)
tile_number = attributes = 0x00;
}
/* bit 3 controls priority, (0) nb1414m4 has priority over all the other video layers */
tileinfo.category = (attributes & 0x8) >> 3;
SET_TILE_INFO_MEMBER(0,
tile_number + 256 * (attributes & 0x3),
attributes >> 4,
0);
}
TILE_GET_INFO_MEMBER(armedf_state::get_armedf_tx_tile_info)
{
u8 tile_number = m_text_videoram[tile_index] & 0xff;
u8 attributes;
/* TODO: Armed F doesn't seem to use the NB1414M4! */
//if (m_scroll_type == 1)
attributes = m_text_videoram[tile_index + 0x800] & 0xff;
//else
//{
// attributes = m_text_videoram[tile_index + 0x400] & 0xff;
//
// if (tile_index < 0x12) /* don't draw the NB1414M4 params! TODO: could be a better fix */
// tile_number = attributes = 0x00;
//}
/* bit 3 controls priority, (0) nb1414m4 has priority over all the other video layers */
tileinfo.category = (attributes & 0x8) >> 3;
SET_TILE_INFO_MEMBER(0,
tile_number + 256 * (attributes & 0x3),
attributes >> 4,
0);
}
TILE_GET_INFO_MEMBER(armedf_state::get_fg_tile_info)
{
const u16 data = m_fg_videoram[tile_index];
SET_TILE_INFO_MEMBER(1,
data&0x7ff,
data>>11,
0);
}
TILE_GET_INFO_MEMBER(armedf_state::get_bg_tile_info)
{
const u16 data = m_bg_videoram[tile_index];
SET_TILE_INFO_MEMBER(2,
data & 0x3ff,
data >> 11,
0);
}
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
VIDEO_START_MEMBER(armedf_state,terraf)
{
m_sprite_offy = (m_scroll_type & 2 ) ? 0 : 128; /* legion, legiono, crazy climber 2 */
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(armedf_state::get_bg_tile_info)), TILEMAP_SCAN_COLS, 16, 16, 64, 32);
m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(armedf_state::get_fg_tile_info)), TILEMAP_SCAN_COLS, 16, 16, 64, 32);
m_tx_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(armedf_state::get_nb1414m4_tx_tile_info)),
(m_scroll_type == 2) ? tilemap_mapper_delegate(*this, FUNC(armedf_state::armedf_scan_type3)) : tilemap_mapper_delegate(*this, FUNC(armedf_state::armedf_scan_type2)), 8, 8, 64, 32);
m_bg_tilemap->set_transparent_pen(0xf);
m_fg_tilemap->set_transparent_pen(0xf);
m_tx_tilemap->set_transparent_pen(0xf);
if (m_scroll_type != 1)
m_tx_tilemap->set_scrollx(0, -128);
}
VIDEO_START_MEMBER(armedf_state,armedf)
{
m_sprite_offy = (m_scroll_type & 2 ) ? 0 : 128; /* legion, legiono, crazy climber 2 */
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(armedf_state::get_bg_tile_info)), TILEMAP_SCAN_COLS, 16, 16, 64, 32);
m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(armedf_state::get_fg_tile_info)), TILEMAP_SCAN_COLS, 16, 16, 64, 32);
m_tx_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(armedf_state::get_armedf_tx_tile_info)), tilemap_mapper_delegate(*this, FUNC(armedf_state::armedf_scan_type1)), 8, 8, 64, 32);
m_bg_tilemap->set_transparent_pen(0xf);
m_fg_tilemap->set_transparent_pen(0xf);
m_tx_tilemap->set_transparent_pen(0xf);
if (m_scroll_type != 1)
m_tx_tilemap->set_scrollx(0, -128);
}
/***************************************************************************
Memory handlers
***************************************************************************/
u8 armedf_state::text_videoram_r(offs_t offset)
{
return m_text_videoram[offset];
}
void armedf_state::text_videoram_w(offs_t offset, u8 data)
{
m_text_videoram[offset] = data;
m_tx_tilemap->mark_tile_dirty(offset & 0x7ff);
}
void armedf_state::fg_videoram_w(offs_t offset, u16 data, u16 mem_mask)
{
COMBINE_DATA(&m_fg_videoram[offset]);
m_fg_tilemap->mark_tile_dirty(offset);
}
void armedf_state::bg_videoram_w(offs_t offset, u16 data, u16 mem_mask)
{
COMBINE_DATA(&m_bg_videoram[offset]);
m_bg_tilemap->mark_tile_dirty(offset);
}
void armedf_state::terrafb_fg_scrolly_w(u8 data)
{
m_fg_scrolly = (data & 0xff) | (m_fg_scrolly & 0x300);
m_waiting_msb = 1;
}
void armedf_state::terrafb_fg_scrollx_w(u8 data)
{
if (m_waiting_msb)
{
m_scroll_msb = data;
m_fg_scrollx = (m_fg_scrollx & 0xff) | (((m_scroll_msb >> 4) & 3) << 8);
m_fg_scrolly = (m_fg_scrolly & 0xff) | (((m_scroll_msb >> 0) & 3) << 8);
//popmessage("%04X %04X %04X",data,m_fg_scrollx,m_fg_scrolly);
}
else
m_fg_scrollx = (data & 0xff) | (m_fg_scrollx & 0x300);
}
void armedf_state::terrafb_fg_scroll_msb_arm_w(u8 data)
{
m_waiting_msb = 0;
}
void armedf_state::fg_scrollx_w(offs_t offset, u16 data, u16 mem_mask)
{
COMBINE_DATA(&m_fg_scrollx);
}
void armedf_state::fg_scrolly_w(offs_t offset, u16 data, u16 mem_mask)
{
COMBINE_DATA(&m_fg_scrolly);
}
void armedf_state::bg_scrollx_w(offs_t offset, u16 data, u16 mem_mask)
{
COMBINE_DATA(&m_bg_scrollx);
m_bg_tilemap->set_scrollx(0, m_bg_scrollx);
}
void armedf_state::bg_scrolly_w(offs_t offset, u16 data, u16 mem_mask)
{
COMBINE_DATA(&m_bg_scrolly);
m_bg_tilemap->set_scrolly(0, m_bg_scrolly);
}
/***************************************************************************
Display refresh
***************************************************************************/
/* custom code to handle color cycling effect, handled by m_spr_pal_clut */
void armedf_state::armedf_drawgfx(bitmap_ind16 &dest_bmp,const rectangle &clip,gfx_element *gfx,
u32 code,u32 color, u32 clut,int flipx,int flipy,int offsx,int offsy,
bitmap_ind8 &primap, u32 pmask, int transparent_color)
{
// high bit of the mask is implicitly on
pmask |= 1 << 31;
const pen_t *pal = &m_palette->pen(gfx->colorbase() + gfx->granularity() * (color % gfx->colors()));
const u8 *source_base = gfx->get_data(code % gfx->elements());
int x_index_base, y_index, sx, sy, ex, ey;
int xinc, yinc;
xinc = flipx ? -1 : 1;
yinc = flipy ? -1 : 1;
x_index_base = flipx ? gfx->width()-1 : 0;
y_index = flipy ? gfx->height()-1 : 0;
/* start coordinates */
sx = offsx;
sy = offsy;
/* end coordinates */
ex = sx + gfx->width();
ey = sy + gfx->height();
if (sx < clip.min_x)
{ /* clip left */
int pixels = clip.min_x-sx;
sx += pixels;
x_index_base += xinc*pixels;
}
if (sy < clip.min_y)
{ /* clip top */
int pixels = clip.min_y-sy;
sy += pixels;
y_index += yinc*pixels;
}
/* NS 980211 - fixed incorrect clipping */
if (ex > clip.max_x+1)
{ /* clip right */
ex = clip.max_x+1;
}
if (ey > clip.max_y+1)
{ /* clip bottom */
ey = clip.max_y+1;
}
if (ex > sx)
{ /* skip if inner loop doesn't draw anything */
int x, y;
{
for (y = sy; y < ey; y++)
{
const u8 *source = source_base + y_index*gfx->rowbytes();
u16 *dest = &dest_bmp.pix16(y);
u8 *destpri = &primap.pix8(y);
int x_index = x_index_base;
for (x = sx; x < ex; x++)
{
int c = (source[x_index] & ~0xf) | ((m_spr_pal_clut[clut*0x10+(source[x_index] & 0xf)]) & 0xf);
if (c != transparent_color)
{
if (((1 << (destpri[x] & 0x1f)) & pmask) == 0)
dest[x] = pal[c];
destpri[x] = 0x1f;
}
x_index += xinc;
}
y_index += yinc;
}
}
}
}
void armedf_state::draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect, bitmap_ind8 &primap )
{
u16 *buffered_spriteram = m_spriteram->buffer();
for (int offs = (m_spriteram->bytes() / 2) - 4; offs >= 0; offs -= 4)
{
u32 pmask = 0;
int code = buffered_spriteram[offs + 1]; /* ??YX?TTTTTTTTTTT */
int flipx = code & 0x2000;
int flipy = code & 0x1000;
int color = (buffered_spriteram[offs + 2] >> 8) & 0x1f;
int clut = (buffered_spriteram[offs + 2]) & 0x7f;
int sx = buffered_spriteram[offs + 3];
int sy = m_sprite_offy + 240 - (buffered_spriteram[offs + 0] & 0x1ff);
int pri = ((buffered_spriteram[offs + 0] & 0x3000) >> 12);
if (pri == 3) // mimic previous driver behavior, correct?
continue;
if (pri >= 1)
pmask |= GFX_PMASK_4;
if (pri >= 2)
pmask |= GFX_PMASK_2;
/*
if (pri >= 3)
pmask |= GFX_PMASK_1;
*/
if (flip_screen())
{
sx = 320 - sx + 176; /* don't ask where 176 comes from, just tried it out */
sy = 240 - sy + 1; /* don't ask where 1 comes from, just tried it out */
flipx = !flipx; /* the values seem to result in pixel-correct placement */
flipy = !flipy; /* in all the games supported by this driver */
}
armedf_drawgfx(bitmap,cliprect,m_gfxdecode->gfx(3),
code & 0xfff,
color,clut,
flipx,flipy,
sx,sy,primap,pmask,15);
}
}
u32 armedf_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int sprite_enable = m_vreg & 0x200;
m_bg_tilemap->enable(m_vreg & 0x800);
m_fg_tilemap->enable(m_vreg & 0x400);
m_tx_tilemap->enable(m_vreg & 0x100);
switch (m_scroll_type)
{
case 0: /* terra force, kozure ookami */
case 2: /* legion */
case 3: /* crazy climber 2 */
m_fg_tilemap->set_scrollx(0, (m_fg_scrollx & 0x3ff));
m_fg_tilemap->set_scrolly(0, (m_fg_scrolly & 0x3ff));
break;
case 1: /* armed formation */
m_fg_tilemap->set_scrollx(0, m_fg_scrollx);
m_fg_tilemap->set_scrolly(0, m_fg_scrolly);
break;
}
screen.priority().fill(0, cliprect);
bitmap.fill(0xff, cliprect);
m_tx_tilemap->draw(screen, bitmap, cliprect, TILEMAP_DRAW_CATEGORY(1), 1);
m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 1);
m_fg_tilemap->draw(screen, bitmap, cliprect, 0, 2);
m_tx_tilemap->draw(screen, bitmap, cliprect, TILEMAP_DRAW_CATEGORY(0), 4);
if (sprite_enable)
draw_sprites(bitmap, cliprect, screen.priority());
return 0;
}