// license:BSD-3-Clause // copyright-holders:Zsolt Vasvari /*************************************************************************** video.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/funkybee.h" PALETTE_INIT_MEMBER(funkybee_state, funkybee) { const uint8_t *color_prom = memregion("proms")->base(); 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_pen_color(i, rgb_t(r,g,b)); color_prom++; } } WRITE8_MEMBER(funkybee_state::funkybee_videoram_w) { m_videoram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(funkybee_state::funkybee_colorram_w) { m_colorram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE_LINE_MEMBER(funkybee_state::gfx_bank_w) { m_gfx_bank = state; machine().tilemap().mark_all_dirty(); } WRITE8_MEMBER(funkybee_state::funkybee_scroll_w) { m_bg_tilemap->set_scrollx(0, flip_screen() ? -data : data); } WRITE_LINE_MEMBER(funkybee_state::flipscreen_w) { flip_screen_set(state); } TILE_GET_INFO_MEMBER(funkybee_state::get_bg_tile_info) { int code = m_videoram[tile_index] + ((m_colorram[tile_index] & 0x80) << 1); int color = m_colorram[tile_index] & 0x03; SET_TILE_INFO_MEMBER(m_gfx_bank, code, color, 0); } TILEMAP_MAPPER_MEMBER(funkybee_state::funkybee_tilemap_scan) { /* logical (col,row) -> memory offset */ return 256 * row + col; } void funkybee_state::video_start() { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(funkybee_state::get_bg_tile_info),this), tilemap_mapper_delegate(FUNC(funkybee_state::funkybee_tilemap_scan),this), 8, 8, 32, 32); } void funkybee_state::draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) { int offs; for (offs = 0x0f; offs >= 0; offs--) { int offs2 = offs + 0x1e00; int attr = m_videoram[offs2]; int code = (attr >> 2) | ((attr & 2) << 5); int color = m_colorram[offs2 + 0x10]; int flipx = 0; int flipy = attr & 0x01; int sx = m_videoram[offs2 + 0x10]; int sy = 224 - m_colorram[offs2]; if (flip_screen()) { sy += 32; flipx = !flipx; } m_gfxdecode->gfx(2 + m_gfx_bank)->transpen(bitmap,cliprect, code, color, flipx, flipy, sx, sy, 0); } } void funkybee_state::draw_columns( bitmap_ind16 &bitmap, const rectangle &cliprect ) { int offs; for (offs = 0x1f; offs >= 0; offs--) { int const flip = flip_screen(); int code = m_videoram[0x1c00 + offs]; int color = m_colorram[0x1f10] & 0x03; int sx = flip ? m_videoram[0x1f1f] : m_videoram[0x1f10]; int sy = offs * 8; if (flip) sy = 248 - sy; m_gfxdecode->gfx(m_gfx_bank)->transpen(bitmap,cliprect, code, color, flip, flip, sx, sy,0); code = m_videoram[0x1d00 + offs]; color = m_colorram[0x1f11] & 0x03; sx = flip ? m_videoram[0x1f1e] : m_videoram[0x1f11]; sy = offs * 8; if (flip) sy = 248 - sy; m_gfxdecode->gfx(m_gfx_bank)->transpen(bitmap,cliprect, code, color, flip, flip, sx, sy,0); } } uint32_t funkybee_state::screen_update_funkybee(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); draw_sprites(bitmap, cliprect); draw_columns(bitmap, cliprect); return 0; }