/***************************************************************************
video.c
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "emu.h"
#include "includes/marineb.h"
PALETTE_INIT( marineb )
{
int i;
for (i = 0; i < machine.total_colors(); i++)
{
int bit0, bit1, bit2, r, g, b;
/* red component */
bit0 = (color_prom[i] >> 0) & 0x01;
bit1 = (color_prom[i] >> 1) & 0x01;
bit2 = (color_prom[i] >> 2) & 0x01;
r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* green component */
bit0 = (color_prom[i] >> 3) & 0x01;
bit1 = (color_prom[i + machine.total_colors()] >> 0) & 0x01;
bit2 = (color_prom[i + machine.total_colors()] >> 1) & 0x01;
g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* blue component */
bit0 = 0;
bit1 = (color_prom[i + machine.total_colors()] >> 2) & 0x01;
bit2 = (color_prom[i + machine.total_colors()] >> 3) & 0x01;
b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
palette_set_color(machine, i, MAKE_RGB(r,g,b));
}
}
/***************************************************************************
Callbacks for the TileMap code
***************************************************************************/
static TILE_GET_INFO( get_tile_info )
{
marineb_state *state = machine.driver_data<marineb_state>();
UINT8 code = state->m_videoram[tile_index];
UINT8 col = state->m_colorram[tile_index];
SET_TILE_INFO(0,
code | ((col & 0xc0) << 2),
(col & 0x0f) | (state->m_palette_bank << 4),
TILE_FLIPXY((col >> 4) & 0x03));
}
/*************************************
*
* Video system start
*
*************************************/
VIDEO_START( marineb )
{
marineb_state *state = machine.driver_data<marineb_state>();
state->m_bg_tilemap = tilemap_create(machine, get_tile_info, tilemap_scan_rows, 8, 8, 32, 32);
tilemap_set_scroll_cols(state->m_bg_tilemap, 32);
state->save_item(NAME(state->m_palette_bank));
state->save_item(NAME(state->m_column_scroll));
state->save_item(NAME(state->m_flipscreen_x));
state->save_item(NAME(state->m_flipscreen_y));
}
/*************************************
*
* Memory handlers
*
*************************************/
WRITE8_HANDLER( marineb_videoram_w )
{
marineb_state *state = space->machine().driver_data<marineb_state>();
state->m_videoram[offset] = data;
tilemap_mark_tile_dirty(state->m_bg_tilemap, offset);
}
WRITE8_HANDLER( marineb_colorram_w )
{
marineb_state *state = space->machine().driver_data<marineb_state>();
state->m_colorram[offset] = data;
tilemap_mark_tile_dirty(state->m_bg_tilemap, offset);
}
WRITE8_HANDLER( marineb_column_scroll_w )
{
marineb_state *state = space->machine().driver_data<marineb_state>();
state->m_column_scroll = data;
}
WRITE8_HANDLER( marineb_palette_bank_0_w )
{
marineb_state *state = space->machine().driver_data<marineb_state>();
UINT8 old = state->m_palette_bank;
state->m_palette_bank = (state->m_palette_bank & 0x02) | (data & 0x01);
if (old != state->m_palette_bank)
{
tilemap_mark_all_tiles_dirty(state->m_bg_tilemap);
}
}
WRITE8_HANDLER( marineb_palette_bank_1_w )
{
marineb_state *state = space->machine().driver_data<marineb_state>();
UINT8 old = state->m_palette_bank;
state->m_palette_bank = (state->m_palette_bank & 0x01) | ((data & 0x01) << 1);
if (old != state->m_palette_bank)
{
tilemap_mark_all_tiles_dirty(state->m_bg_tilemap);
}
}
WRITE8_HANDLER( marineb_flipscreen_x_w )
{
marineb_state *state = space->machine().driver_data<marineb_state>();
state->m_flipscreen_x = data ^ state->m_marineb_active_low_flipscreen;
tilemap_set_flip(state->m_bg_tilemap, (state->m_flipscreen_x ? TILEMAP_FLIPX : 0) | (state->m_flipscreen_y ? TILEMAP_FLIPY : 0));
}
WRITE8_HANDLER( marineb_flipscreen_y_w )
{
marineb_state *state = space->machine().driver_data<marineb_state>();
state->m_flipscreen_y = data ^ state->m_marineb_active_low_flipscreen;
tilemap_set_flip(state->m_bg_tilemap, (state->m_flipscreen_x ? TILEMAP_FLIPX : 0) | (state->m_flipscreen_y ? TILEMAP_FLIPY : 0));
}
/*************************************
*
* Video update
*
*************************************/
static void set_tilemap_scrolly( running_machine &machine, int cols )
{
marineb_state *state = machine.driver_data<marineb_state>();
int col;
for (col = 0; col < cols; col++)
tilemap_set_scrolly(state->m_bg_tilemap, col, state->m_column_scroll);
for (; col < 32; col++)
tilemap_set_scrolly(state->m_bg_tilemap, col, 0);
}
SCREEN_UPDATE( marineb )
{
marineb_state *state = screen->machine().driver_data<marineb_state>();
int offs;
set_tilemap_scrolly(screen->machine(), 24);
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
/* draw the sprites */
for (offs = 0x0f; offs >= 0; offs--)
{
int gfx, sx, sy, code, col, flipx, flipy, offs2;
if ((offs == 0) || (offs == 2))
continue; /* no sprites here */
if (offs < 8)
offs2 = 0x0018 + offs;
else
offs2 = 0x03d8 - 8 + offs;
code = state->m_videoram[offs2];
sx = state->m_videoram[offs2 + 0x20];
sy = state->m_colorram[offs2];
col = (state->m_colorram[offs2 + 0x20] & 0x0f) + 16 * state->m_palette_bank;
flipx = code & 0x02;
flipy = !(code & 0x01);
if (offs < 4)
{
/* big sprite */
gfx = 2;
code = (code >> 4) | ((code & 0x0c) << 2);
}
else
{
/* small sprite */
gfx = 1;
code >>= 2;
}
if (!state->m_flipscreen_y)
{
sy = 256 - screen->machine().gfx[gfx]->width - sy;
flipy = !flipy;
}
if (state->m_flipscreen_x)
{
sx++;
}
drawgfx_transpen(bitmap,cliprect,screen->machine().gfx[gfx],
code,
col,
flipx,flipy,
sx,sy,0);
}
return 0;
}
SCREEN_UPDATE( changes )
{
marineb_state *state = screen->machine().driver_data<marineb_state>();
int offs, sx, sy, code, col, flipx, flipy;
set_tilemap_scrolly(screen->machine(), 26);
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
/* draw the small sprites */
for (offs = 0x05; offs >= 0; offs--)
{
int offs2;
offs2 = 0x001a + offs;
code = state->m_videoram[offs2];
sx = state->m_videoram[offs2 + 0x20];
sy = state->m_colorram[offs2];
col = (state->m_colorram[offs2 + 0x20] & 0x0f) + 16 * state->m_palette_bank;
flipx = code & 0x02;
flipy = !(code & 0x01);
if (!state->m_flipscreen_y)
{
sy = 256 - screen->machine().gfx[1]->width - sy;
flipy = !flipy;
}
if (state->m_flipscreen_x)
{
sx++;
}
drawgfx_transpen(bitmap,cliprect,screen->machine().gfx[1],
code >> 2,
col,
flipx,flipy,
sx,sy,0);
}
/* draw the big sprite */
code = state->m_videoram[0x3df];
sx = state->m_videoram[0x3ff];
sy = state->m_colorram[0x3df];
col = state->m_colorram[0x3ff];
flipx = code & 0x02;
flipy = !(code & 0x01);
if (!state->m_flipscreen_y)
{
sy = 256 - screen->machine().gfx[2]->width - sy;
flipy = !flipy;
}
if (state->m_flipscreen_x)
{
sx++;
}
code >>= 4;
drawgfx_transpen(bitmap,cliprect,screen->machine().gfx[2],
code,
col,
flipx,flipy,
sx,sy,0);
/* draw again for wrap around */
drawgfx_transpen(bitmap,cliprect,screen->machine().gfx[2],
code,
col,
flipx,flipy,
sx-256,sy,0);
return 0;
}
SCREEN_UPDATE( springer )
{
marineb_state *state = screen->machine().driver_data<marineb_state>();
int offs;
set_tilemap_scrolly(screen->machine(), 0);
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
/* draw the sprites */
for (offs = 0x0f; offs >= 0; offs--)
{
int gfx, sx, sy, code, col, flipx, flipy, offs2;
if ((offs == 0) || (offs == 2))
continue; /* no sprites here */
offs2 = 0x0010 + offs;
code = state->m_videoram[offs2];
sx = 240 - state->m_videoram[offs2 + 0x20];
sy = state->m_colorram[offs2];
col = (state->m_colorram[offs2 + 0x20] & 0x0f) + 16 * state->m_palette_bank;
flipx = !(code & 0x02);
flipy = !(code & 0x01);
if (offs < 4)
{
/* big sprite */
sx -= 0x10;
gfx = 2;
code = (code >> 4) | ((code & 0x0c) << 2);
}
else
{
/* small sprite */
gfx = 1;
code >>= 2;
}
if (!state->m_flipscreen_y)
{
sy = 256 - screen->machine().gfx[gfx]->width - sy;
flipy = !flipy;
}
if (!state->m_flipscreen_x)
{
sx--;
}
drawgfx_transpen(bitmap,cliprect,screen->machine().gfx[gfx],
code,
col,
flipx,flipy,
sx,sy,0);
}
return 0;
}
SCREEN_UPDATE( hoccer )
{
marineb_state *state = screen->machine().driver_data<marineb_state>();
int offs;
set_tilemap_scrolly(screen->machine(), 0);
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
/* draw the sprites */
for (offs = 0x07; offs >= 0; offs--)
{
int sx, sy, code, col, flipx, flipy, offs2;
offs2 = 0x0018 + offs;
code = state->m_spriteram[offs2];
sx = state->m_spriteram[offs2 + 0x20];
sy = state->m_colorram[offs2];
col = state->m_colorram[offs2 + 0x20];
flipx = code & 0x02;
flipy = !(code & 0x01);
if (!state->m_flipscreen_y)
{
sy = 256 - screen->machine().gfx[1]->width - sy;
flipy = !flipy;
}
if (state->m_flipscreen_x)
{
sx = 256 - screen->machine().gfx[1]->width - sx;
flipx = !flipx;
}
drawgfx_transpen(bitmap,cliprect,screen->machine().gfx[1],
code >> 2,
col,
flipx,flipy,
sx,sy,0);
}
return 0;
}
SCREEN_UPDATE( hopprobo )
{
marineb_state *state = screen->machine().driver_data<marineb_state>();
int offs;
set_tilemap_scrolly(screen->machine(), 0);
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
/* draw the sprites */
for (offs = 0x0f; offs >= 0; offs--)
{
int gfx, sx, sy, code, col, flipx, flipy, offs2;
if ((offs == 0) || (offs == 2))
continue; /* no sprites here */
offs2 = 0x0010 + offs;
code = state->m_videoram[offs2];
sx = state->m_videoram[offs2 + 0x20];
sy = state->m_colorram[offs2];
col = (state->m_colorram[offs2 + 0x20] & 0x0f) + 16 * state->m_palette_bank;
flipx = code & 0x02;
flipy = !(code & 0x01);
if (offs < 4)
{
/* big sprite */
gfx = 2;
code = (code >> 4) | ((code & 0x0c) << 2);
}
else
{
/* small sprite */
gfx = 1;
code >>= 2;
}
if (!state->m_flipscreen_y)
{
sy = 256 - screen->machine().gfx[gfx]->width - sy;
flipy = !flipy;
}
if (!state->m_flipscreen_x)
{
sx--;
}
drawgfx_transpen(bitmap,cliprect,screen->machine().gfx[gfx],
code,
col,
flipx,flipy,
sx,sy,0);
}
return 0;
}