/*************************************************************************** video.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/kchamp.h" PALETTE_INIT( kchamp ) { int i, red, green, blue; for (i = 0; i < machine.total_colors(); i++) { red = color_prom[i]; green = color_prom[machine.total_colors() + i]; blue = color_prom[2 * machine.total_colors() + i]; palette_set_color_rgb(machine, i, pal4bit(red), pal4bit(green), pal4bit(blue)); } } WRITE8_HANDLER( kchamp_videoram_w ) { kchamp_state *state = space->machine().driver_data(); state->m_videoram[offset] = data; tilemap_mark_tile_dirty(state->m_bg_tilemap, offset); } WRITE8_HANDLER( kchamp_colorram_w ) { kchamp_state *state = space->machine().driver_data(); state->m_colorram[offset] = data; tilemap_mark_tile_dirty(state->m_bg_tilemap, offset); } WRITE8_HANDLER( kchamp_flipscreen_w ) { flip_screen_set(space->machine(), data & 0x01); } static TILE_GET_INFO( get_bg_tile_info ) { kchamp_state *state = machine.driver_data(); int code = state->m_videoram[tile_index] + ((state->m_colorram[tile_index] & 7) << 8); int color = (state->m_colorram[tile_index] >> 3) & 0x1f; SET_TILE_INFO(0, code, color, 0); } VIDEO_START( kchamp ) { kchamp_state *state = machine.driver_data(); state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info, tilemap_scan_rows, 8, 8, 32, 32); } /* Sprites ------- Offset Encoding 0 YYYYYYYY 1 TTTTTTTT 2 FGGTCCCC 3 XXXXXXXX */ static void kchamp_draw_sprites( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect ) { kchamp_state *state = machine.driver_data(); UINT8 *spriteram = state->m_spriteram; int offs; for (offs = 0; offs < 0x100; offs += 4) { int attr = spriteram[offs + 2]; int bank = 1 + ((attr & 0x60) >> 5); int code = spriteram[offs + 1] + ((attr & 0x10) << 4); int color = attr & 0x0f; int flipx = 0; int flipy = attr & 0x80; int sx = spriteram[offs + 3] - 8; int sy = 247 - spriteram[offs]; if (flip_screen_get(machine)) { sx = 240 - sx; sy = 240 - sy; flipx = !flipx; flipy = !flipy; } drawgfx_transpen(bitmap, cliprect, machine.gfx[bank], code, color, flipx, flipy, sx, sy, 0); } } static void kchampvs_draw_sprites( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect ) { kchamp_state *state = machine.driver_data(); UINT8 *spriteram = state->m_spriteram; int offs; for (offs = 0; offs < 0x100; offs += 4) { int attr = spriteram[offs + 2]; int bank = 1 + ((attr & 0x60) >> 5); int code = spriteram[offs + 1] + ((attr & 0x10) << 4); int color = attr & 0x0f; int flipx = 0; int flipy = attr & 0x80; int sx = spriteram[offs + 3]; int sy = 240 - spriteram[offs]; if (flip_screen_get(machine)) { sx = 240 - sx; sy = 240 - sy; flipx = !flipx; flipy = !flipy; } drawgfx_transpen(bitmap, cliprect, machine.gfx[bank], code, color, flipx, flipy, sx, sy, 0); } } SCREEN_UPDATE( kchamp ) { kchamp_state *state = screen->machine().driver_data(); tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0); kchamp_draw_sprites(screen->machine(), bitmap, cliprect); return 0; } SCREEN_UPDATE( kchampvs ) { kchamp_state *state = screen->machine().driver_data(); tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0); kchampvs_draw_sprites(screen->machine(), bitmap, cliprect); return 0; }