// license:BSD-3-Clause // copyright-holders:Brad Oliver /*************************************************************************** video/jack.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/jack.h" WRITE8_MEMBER(jack_state::jack_videoram_w) { m_videoram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(jack_state::jack_colorram_w) { m_colorram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } READ8_MEMBER(jack_state::jack_flipscreen_r) { flip_screen_set(offset); return 0; } WRITE8_MEMBER(jack_state::jack_flipscreen_w) { flip_screen_set(offset); } /**************************************************************************/ TILE_GET_INFO_MEMBER(jack_state::get_bg_tile_info) { int code = m_videoram[tile_index] + ((m_colorram[tile_index] & 0x18) << 5); int color = m_colorram[tile_index] & 0x07; // striv: m_colorram[tile_index] & 0x80 ??? SET_TILE_INFO_MEMBER(0, code, color, 0); } TILEMAP_MAPPER_MEMBER(jack_state::tilemap_scan_cols_flipy) { /* logical (col,row) -> memory offset */ return (col * num_rows) + (num_rows - 1 - row); } void jack_state::video_start() { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(jack_state::get_bg_tile_info)), tilemap_mapper_delegate(*this, FUNC(jack_state::tilemap_scan_cols_flipy)), 8, 8, 32, 32); } /**************************************************************************/ void jack_state::jack_draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) { uint8_t *spriteram = m_spriteram; int offs; for (offs = m_spriteram.bytes() - 4; offs >= 0; offs -= 4) { int sy = spriteram[offs]; int sx = spriteram[offs + 1]; int code = spriteram[offs + 2] | ((spriteram[offs + 3] & 0x08) << 5); int color = spriteram[offs + 3] & 0x07; int flipx = (spriteram[offs + 3] & 0x80) >> 7; int flipy = (spriteram[offs + 3] & 0x40) >> 6; if (flip_screen()) { sx = 248 - sx; sy = 248 - sy; flipx = !flipx; flipy = !flipy; } m_gfxdecode->gfx(0)->transpen(bitmap,cliprect, code, color, flipx,flipy, sx,sy,0); } } uint32_t jack_state::screen_update_jack(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); jack_draw_sprites(bitmap, cliprect); return 0; } uint32_t jack_state::screen_update_striv(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { // no sprites m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); return 0; } /*************************************************************************** Joinem has a bit different video hardware with proms based palette, 3bpp gfx and different banking / colors bits ***************************************************************************/ WRITE8_MEMBER(jack_state::joinem_scroll_w) { switch (offset & 3) { // byte 0: column scroll case 0: m_bg_tilemap->set_scrolly(offset >> 2, -data); break; // byte 1/2/3: no effect? default: break; } m_scrollram[offset] = data; } /**************************************************************************/ void jack_state::joinem_palette(palette_device &palette) const { uint8_t const *const color_prom = memregion("proms")->base(); for (int i = 0; i < palette.entries(); i++) { int bit0, bit1, bit2; bit0 = (color_prom[i] >> 0) & 0x01; bit1 = (color_prom[i] >> 1) & 0x01; bit2 = (color_prom[i] >> 2) & 0x01; int const 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; int const g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; bit0 = 0; bit1 = (color_prom[i] >> 6) & 0x01; bit2 = (color_prom[i] >> 7) & 0x01; int const b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; palette.set_pen_color(i, rgb_t(r, g, b)); } } TILE_GET_INFO_MEMBER(jack_state::joinem_get_bg_tile_info) { int code = m_videoram[tile_index] + ((m_colorram[tile_index] & 0x03) << 8); int color = (m_colorram[tile_index] & 0x38) >> 3 | m_joinem_palette_bank; SET_TILE_INFO_MEMBER(0, code, color, 0); } VIDEO_START_MEMBER(jack_state,joinem) { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(jack_state::joinem_get_bg_tile_info)), tilemap_mapper_delegate(*this, FUNC(jack_state::tilemap_scan_cols_flipy)), 8, 8, 32, 32); m_bg_tilemap->set_scroll_cols(32); } /**************************************************************************/ void jack_state::joinem_draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) { uint8_t *spriteram = m_spriteram; int offs; for (offs = m_spriteram.bytes() - 4; offs >= 0; offs -= 4) { int sy = spriteram[offs]; int sx = spriteram[offs + 1]; int code = spriteram[offs + 2] | ((spriteram[offs + 3] & 0x03) << 8); int color = (spriteram[offs + 3] & 0x38) >> 3 | m_joinem_palette_bank; int flipx = (spriteram[offs + 3] & 0x80) >> 7; int flipy = (spriteram[offs + 3] & 0x40) >> 6; if (flip_screen()) { sx = 248 - sx; sy = 248 - sy; flipx = !flipx; flipy = !flipy; } m_gfxdecode->gfx(0)->transpen(bitmap,cliprect, code, color, flipx,flipy, sx,sy,0); } } uint32_t jack_state::screen_update_joinem(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); joinem_draw_sprites(bitmap, cliprect); return 0; }