// license:BSD-3-Clause // copyright-holders:Zsolt Vasvari /*************************************************************************** video.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/hanaawas.h" /*************************************************************************** Convert the color PROMs into a more useable format. ***************************************************************************/ void hanaawas_state::hanaawas_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; // character lookup table. The 1bpp tiles really only use colors 0-0x0f and the 3bpp ones 0x10-0x1f for (int i = 0; i < 0x100; i++) { int const swapped_i = bitswap<8>(i, 2,7,6,5,4,3,1,0); uint8_t const ctabentry = color_prom[swapped_i] & 0x0f; palette.set_pen_indirect(i, ctabentry); } } WRITE8_MEMBER(hanaawas_state::hanaawas_videoram_w) { m_videoram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(hanaawas_state::hanaawas_colorram_w) { m_colorram[offset] = data; /* dirty both current and next offsets */ m_bg_tilemap->mark_tile_dirty(offset); m_bg_tilemap->mark_tile_dirty((offset + (flip_screen() ? -1 : 1)) & 0x03ff); } WRITE8_MEMBER(hanaawas_state::hanaawas_portB_w) { /* bit 7 is flip screen */ if (flip_screen() != (~data & 0x80)) { flip_screen_set(~data & 0x80); machine().tilemap().mark_all_dirty(); } } TILE_GET_INFO_MEMBER(hanaawas_state::get_bg_tile_info) { /* the color is determined by the current color byte, but the bank is via the previous one!!! */ int offset = (tile_index + (flip_screen() ? 1 : -1)) & 0x3ff; int attr = m_colorram[offset]; int gfxbank = (attr & 0x40) >> 6; int code = m_videoram[tile_index] + ((attr & 0x20) << 3); int color = m_colorram[tile_index] & 0x1f; SET_TILE_INFO_MEMBER(gfxbank, code, color, 0); } void hanaawas_state::video_start() { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(hanaawas_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); } uint32_t hanaawas_state::screen_update_hanaawas(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); return 0; }