/****************************************************************************************
Competition Golf Final Round
video hardware emulation
****************************************************************************************/
#include "emu.h"
#include "includes/compgolf.h"
PALETTE_INIT( compgolf )
{
int i;
for (i = 0; i < machine.total_colors(); i++)
{
int bit0,bit1,bit2,r,g,b;
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;
bit0 = (color_prom[i] >> 3) & 0x01;
bit1 = (color_prom[i] >> 4) & 0x01;
bit2 = (color_prom[i] >> 5) & 0x01;
g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
bit0 = 0;
bit1 = (color_prom[i] >> 6) & 0x01;
bit2 = (color_prom[i] >> 7) & 0x01;
b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
palette_set_color(machine, i, MAKE_RGB(r,g,b));
}
}
WRITE8_HANDLER( compgolf_video_w )
{
compgolf_state *state = space->machine().driver_data<compgolf_state>();
state->m_videoram[offset] = data;
tilemap_mark_tile_dirty(state->m_text_tilemap, offset / 2);
}
WRITE8_HANDLER( compgolf_back_w )
{
compgolf_state *state = space->machine().driver_data<compgolf_state>();
state->m_bg_ram[offset] = data;
tilemap_mark_tile_dirty(state->m_bg_tilemap, offset / 2);
}
static TILE_GET_INFO( get_text_info )
{
compgolf_state *state = machine.driver_data<compgolf_state>();
tile_index <<= 1;
SET_TILE_INFO(2, state->m_videoram[tile_index + 1] | (state->m_videoram[tile_index] << 8), state->m_videoram[tile_index] >> 2, 0);
}
static TILEMAP_MAPPER( back_scan )
{
/* logical (col,row) -> memory offset */
return (col & 0x0f) + ((row & 0x0f) << 4) + ((col & 0x10) << 4) + ((row & 0x10) << 5);
}
static TILE_GET_INFO( get_back_info )
{
compgolf_state *state = machine.driver_data<compgolf_state>();
int attr = state->m_bg_ram[tile_index * 2];
int code = state->m_bg_ram[tile_index * 2 + 1] + ((attr & 1) << 8);
int color = (attr & 0x3e) >> 1;
SET_TILE_INFO(1, code, color, 0);
}
VIDEO_START( compgolf )
{
compgolf_state *state = machine.driver_data<compgolf_state>();
state->m_bg_tilemap = tilemap_create(machine, get_back_info, back_scan, 16, 16, 32, 32);
state->m_text_tilemap = tilemap_create(machine, get_text_info, tilemap_scan_rows, 8, 8, 32, 32);
tilemap_set_transparent_pen(state->m_text_tilemap, 0);
}
/*
preliminary sprite list:
0 1 2 3
xx------ xxxxxxxx -------- -------- sprite code
---x---- -------- -------- -------- Double Height
----x--- -------- -------- -------- Color,all of it?
-------- -------- xxxxxxxx -------- Y pos
-------- -------- -------- xxxxxxxx X pos
-----x-- -------- -------- -------- Flip X
-------- -------- -------- -------- Flip Y(used?)
*/
static void draw_sprites( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect )
{
compgolf_state *state = machine.driver_data<compgolf_state>();
int offs, fx, fy, x, y, color, sprite;
for (offs = 0; offs < 0x60; offs += 4)
{
sprite = state->m_spriteram[offs + 1] + (((state->m_spriteram[offs] & 0xc0) >> 6) * 0x100);
x = 240 - state->m_spriteram[offs + 3];
y = state->m_spriteram[offs + 2];
color = (state->m_spriteram[offs] & 8)>>3;
fx = state->m_spriteram[offs] & 4;
fy = 0; /* ? */
drawgfx_transpen(bitmap,cliprect,machine.gfx[0],
sprite,
color,fx,fy,x,y,0);
/* Double Height */
if(state->m_spriteram[offs] & 0x10)
{
drawgfx_transpen(bitmap,cliprect,machine.gfx[0],
sprite + 1,
color, fx, fy, x, y + 16, 0);
}
}
}
SCREEN_UPDATE( compgolf )
{
compgolf_state *state = screen->machine().driver_data<compgolf_state>();
int scrollx = state->m_scrollx_hi + state->m_scrollx_lo;
int scrolly = state->m_scrolly_hi + state->m_scrolly_lo;
tilemap_set_scrollx(state->m_bg_tilemap, 0, scrollx);
tilemap_set_scrolly(state->m_bg_tilemap, 0, scrolly);
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
tilemap_draw(bitmap, cliprect, state->m_text_tilemap, 0, 0);
draw_sprites(screen->machine(), bitmap, cliprect);
return 0;
}