// license:BSD-3-Clause // copyright-holders:Ernesto Corvi /*************************************************************************** video.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/kchamp.h" void kchamp_state::kchamp_palette(palette_device &palette) const { uint8_t const *const color_prom = memregion("proms")->base(); for (int i = 0; i < palette.entries(); i++) { int const red = color_prom[i]; int const green = color_prom[palette.entries() + i]; int const blue = color_prom[2 * palette.entries() + i]; palette.set_pen_color(i, pal4bit(red), pal4bit(green), pal4bit(blue)); } } WRITE8_MEMBER(kchamp_state::kchamp_videoram_w) { m_videoram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(kchamp_state::kchamp_colorram_w) { m_colorram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE_LINE_MEMBER(kchamp_state::flipscreen_w) { flip_screen_set(state); } TILE_GET_INFO_MEMBER(kchamp_state::get_bg_tile_info) { int code = m_videoram[tile_index] + ((m_colorram[tile_index] & 7) << 8); int color = (m_colorram[tile_index] >> 3) & 0x1f; SET_TILE_INFO_MEMBER(0, code, color, 0); } void kchamp_state::video_start() { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(kchamp_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); } /* Sprites ------- Offset Encoding 0 YYYYYYYY 1 TTTTTTTT 2 FGGTCCCC 3 XXXXXXXX */ void kchamp_state::kchamp_draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) { uint8_t *spriteram = 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()) { sx = 240 - sx; sy = 240 - sy; flipx = !flipx; flipy = !flipy; } m_gfxdecode->gfx(bank)->transpen(bitmap,cliprect, code, color, flipx, flipy, sx, sy, 0); } } void kchamp_state::kchampvs_draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) { uint8_t *spriteram = 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()) { sx = 240 - sx; sy = 240 - sy; flipx = !flipx; flipy = !flipy; } m_gfxdecode->gfx(bank)->transpen(bitmap,cliprect, code, color, flipx, flipy, sx, sy, 0); } } uint32_t kchamp_state::screen_update_kchamp(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); kchamp_draw_sprites(bitmap, cliprect); return 0; } uint32_t kchamp_state::screen_update_kchampvs(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); kchampvs_draw_sprites(bitmap, cliprect); return 0; }