/**************************************************************************************** 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(); 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(); 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(); 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(); 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(); 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(); 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(); 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; }