// license:BSD-3-Clause // copyright-holders:Takahiro Nogi /*************************************************************************** video.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/mrjong.h" /*************************************************************************** Convert the color PROMs. (from video/pengo.c) ***************************************************************************/ void mrjong_state::mrjong_palette(palette_device &palette) const { uint8_t const *color_prom = memregion("proms")->base(); // create a lookup table for the palette for (int i = 0; i < 0x10; i++) { int bit0, bit1, bit2; // red component bit0 = BIT(color_prom[i], 0); bit1 = BIT(color_prom[i], 1); bit2 = BIT(color_prom[i], 2); int const r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; // green component bit0 = BIT(color_prom[i], 3); bit1 = BIT(color_prom[i], 4); bit2 = BIT(color_prom[i], 5); int const g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; // blue component bit0 = 0; bit1 = BIT(color_prom[i], 6); bit2 = BIT(color_prom[i], 7); int const b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; palette.set_indirect_color(i, rgb_t(r, g, b)); } // color_prom now points to the beginning of the lookup table color_prom += 0x20; // characters/sprites for (int i = 0; i < 0x80; i++) { uint8_t const ctabentry = color_prom[i] & 0x0f; palette.set_pen_indirect(i, ctabentry); } } /*************************************************************************** Display control parameter. ***************************************************************************/ WRITE8_MEMBER(mrjong_state::mrjong_videoram_w) { m_videoram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(mrjong_state::mrjong_colorram_w) { m_colorram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(mrjong_state::mrjong_flipscreen_w) { if (flip_screen() != BIT(data, 2)) { flip_screen_set(BIT(data, 2)); machine().tilemap().mark_all_dirty(); } } TILE_GET_INFO_MEMBER(mrjong_state::get_bg_tile_info) { int code = m_videoram[tile_index] | ((m_colorram[tile_index] & 0x20) << 3); int color = m_colorram[tile_index] & 0x1f; int flags = ((m_colorram[tile_index] & 0x40) ? TILE_FLIPX : 0) | ((m_colorram[tile_index] & 0x80) ? TILE_FLIPY : 0); SET_TILE_INFO_MEMBER(0, code, color, flags); } void mrjong_state::video_start() { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(mrjong_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS_FLIP_XY, 8, 8, 32, 32); } /* Note: First 0x40 entries in the videoram are actually spriteram */ void mrjong_state::draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) { int offs; for (offs = (0x40 - 4); offs >= 0; offs -= 4) { int sprt; int color; int sx, sy; int flipx, flipy; sprt = (((m_videoram[offs + 1] >> 2) & 0x3f) | ((m_videoram[offs + 3] & 0x20) << 1)); flipx = (m_videoram[offs + 1] & 0x01) >> 0; flipy = (m_videoram[offs + 1] & 0x02) >> 1; color = (m_videoram[offs + 3] & 0x1f); sx = 224 - m_videoram[offs + 2]; sy = m_videoram[offs + 0]; if (flip_screen()) { sx = 208 - sx; sy = 240 - sy; flipx = !flipx; flipy = !flipy; } m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, sprt, color, flipx, flipy, sx, sy, 0); } } uint32_t mrjong_state::screen_update_mrjong(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); draw_sprites(bitmap, cliprect); return 0; }