// 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. ***************************************************************************/ PALETTE_INIT_MEMBER(hanaawas_state, hanaawas) { const uint8_t *color_prom = memregion("proms")->base(); int i; /* create a lookup table for the palette */ for (i = 0; i < 0x10; i++) { int bit0, bit1, bit2; int r, g, b; /* red component */ bit0 = (color_prom[i] >> 0) & 0x01; bit1 = (color_prom[i] >> 1) & 0x01; bit2 = (color_prom[i] >> 2) & 0x01; r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; /* green component */ bit0 = (color_prom[i] >> 3) & 0x01; bit1 = (color_prom[i] >> 4) & 0x01; bit2 = (color_prom[i] >> 5) & 0x01; g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; /* blue component */ bit0 = 0; bit1 = (color_prom[i] >> 6) & 0x01; bit2 = (color_prom[i] >> 7) & 0x01; 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 (i = 0; i < 0x100; i++) { int swapped_i = bitswap<8>(i,2,7,6,5,4,3,1,0); uint8_t 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(FUNC(hanaawas_state::get_bg_tile_info),this), 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; }