/*************************************************************************** video.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/funkybee.h" PALETTE_INIT( funkybee ) { int i; /* first, the character/sprite palette */ for (i = 0; i < 32; i++) { int bit0, bit1, bit2, r, g, b; /* red component */ bit0 = (*color_prom >> 0) & 0x01; bit1 = (*color_prom >> 1) & 0x01; bit2 = (*color_prom >> 2) & 0x01; r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; /* green component */ bit0 = (*color_prom >> 3) & 0x01; bit1 = (*color_prom >> 4) & 0x01; bit2 = (*color_prom >> 5) & 0x01; g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; /* blue component */ bit0 = 0; bit1 = (*color_prom >> 6) & 0x01; bit2 = (*color_prom >> 7) & 0x01; b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; palette_set_color(machine, i, MAKE_RGB(r,g,b)); color_prom++; } } WRITE8_HANDLER( funkybee_videoram_w ) { funkybee_state *state = space->machine().driver_data(); state->m_videoram[offset] = data; tilemap_mark_tile_dirty(state->m_bg_tilemap, offset); } WRITE8_HANDLER( funkybee_colorram_w ) { funkybee_state *state = space->machine().driver_data(); state->m_colorram[offset] = data; tilemap_mark_tile_dirty(state->m_bg_tilemap, offset); } WRITE8_HANDLER( funkybee_gfx_bank_w ) { funkybee_state *state = space->machine().driver_data(); if (state->m_gfx_bank != (data & 0x01)) { state->m_gfx_bank = data & 0x01; tilemap_mark_all_tiles_dirty_all(space->machine()); } } WRITE8_HANDLER( funkybee_scroll_w ) { funkybee_state *state = space->machine().driver_data(); tilemap_set_scrollx(state->m_bg_tilemap, 0, flip_screen_get(space->machine()) ? -data : data); } WRITE8_HANDLER( funkybee_flipscreen_w ) { flip_screen_set(space->machine(), data & 0x01); } static TILE_GET_INFO( get_bg_tile_info ) { funkybee_state *state = machine.driver_data(); int code = state->m_videoram[tile_index] + ((state->m_colorram[tile_index] & 0x80) << 1); int color = state->m_colorram[tile_index] & 0x03; SET_TILE_INFO(state->m_gfx_bank, code, color, 0); } static TILEMAP_MAPPER( funkybee_tilemap_scan ) { /* logical (col,row) -> memory offset */ return 256 * row + col; } VIDEO_START( funkybee ) { funkybee_state *state = machine.driver_data(); state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info, funkybee_tilemap_scan, 8, 8, 32, 32); } static void draw_sprites( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect ) { funkybee_state *state = machine.driver_data(); int offs; for (offs = 0x0f; offs >= 0; offs--) { int offs2 = offs + 0x1e00; int attr = state->m_videoram[offs2]; int code = (attr >> 2) | ((attr & 2) << 5); int color = state->m_colorram[offs2 + 0x10]; int flipx = 0; int flipy = attr & 0x01; int sx = state->m_videoram[offs2 + 0x10]; int sy = 224 - state->m_colorram[offs2]; if (flip_screen_get(machine)) { sy += 32; flipx = !flipx; } drawgfx_transpen(bitmap,cliprect, machine.gfx[2 + state->m_gfx_bank], code, color, flipx, flipy, sx, sy, 0); } } static void draw_columns( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect ) { funkybee_state *state = machine.driver_data(); int offs; for (offs = 0x1f; offs >= 0; offs--) { int const flip = flip_screen_get(machine); int code = state->m_videoram[0x1c00 + offs]; int color = state->m_colorram[0x1f10] & 0x03; int sx = flip ? state->m_videoram[0x1f1f] : state->m_videoram[0x1f10]; int sy = offs * 8; if (flip) sy = 248 - sy; drawgfx_transpen(bitmap,cliprect,machine.gfx[state->m_gfx_bank], code, color, flip, flip, sx, sy,0); code = state->m_videoram[0x1d00 + offs]; color = state->m_colorram[0x1f11] & 0x03; sx = flip ? state->m_videoram[0x1f1e] : state->m_videoram[0x1f11]; sy = offs * 8; if (flip) sy = 248 - sy; drawgfx_transpen(bitmap,cliprect,machine.gfx[state->m_gfx_bank], code, color, flip, flip, sx, sy,0); } } SCREEN_UPDATE( funkybee ) { funkybee_state *state = screen->machine().driver_data(); tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0); draw_sprites(screen->machine(), bitmap, cliprect); draw_columns(screen->machine(), bitmap, cliprect); return 0; }