// license:BSD-3-Clause // copyright-holders:Zsolt Vasvari /*************************************************************************** video.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/marineb.h" void marineb_state::marineb_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; // 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) & 0x01; bit1 = BIT(color_prom[i + palette.entries()], 0); bit2 = BIT(color_prom[i + palette.entries()], 1); int const g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; // blue component bit0 = 0; bit1 = BIT(color_prom[i + palette.entries()], 2); bit2 = BIT(color_prom[i + palette.entries()], 3); int const b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; palette.set_pen_color(i, rgb_t(r, g, b)); } } /*************************************************************************** Callbacks for the TileMap code ***************************************************************************/ TILE_GET_INFO_MEMBER(marineb_state::get_tile_info) { uint8_t code = m_videoram[tile_index]; uint8_t col = m_colorram[tile_index]; SET_TILE_INFO_MEMBER(0, code | ((col & 0xc0) << 2), (col & 0x0f) | (m_palette_bank << 4), TILE_FLIPXY((col >> 4) & 0x03)); } /************************************* * * Video system start * *************************************/ void marineb_state::video_start() { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(marineb_state::get_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); m_bg_tilemap->set_scroll_cols(32); save_item(NAME(m_palette_bank)); save_item(NAME(m_column_scroll)); save_item(NAME(m_flipscreen_x)); save_item(NAME(m_flipscreen_y)); } /************************************* * * Memory handlers * *************************************/ WRITE8_MEMBER(marineb_state::marineb_videoram_w) { m_videoram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(marineb_state::marineb_colorram_w) { m_colorram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(marineb_state::marineb_column_scroll_w) { m_column_scroll = data; } WRITE8_MEMBER(marineb_state::marineb_palette_bank_0_w) { uint8_t old = m_palette_bank; m_palette_bank = (m_palette_bank & 0x02) | (data & 0x01); if (old != m_palette_bank) { m_bg_tilemap->mark_all_dirty(); } } WRITE8_MEMBER(marineb_state::marineb_palette_bank_1_w) { uint8_t old = m_palette_bank; m_palette_bank = (m_palette_bank & 0x01) | ((data & 0x01) << 1); if (old != m_palette_bank) { m_bg_tilemap->mark_all_dirty(); } } WRITE_LINE_MEMBER(marineb_state::flipscreen_x_w) { m_flipscreen_x = state; m_bg_tilemap->set_flip((m_flipscreen_x ? TILEMAP_FLIPX : 0) | (m_flipscreen_y ? TILEMAP_FLIPY : 0)); } WRITE_LINE_MEMBER(marineb_state::flipscreen_y_w) { m_flipscreen_y = state; m_bg_tilemap->set_flip((m_flipscreen_x ? TILEMAP_FLIPX : 0) | (m_flipscreen_y ? TILEMAP_FLIPY : 0)); } /************************************* * * Video update * *************************************/ void marineb_state::set_tilemap_scrolly( int cols ) { int col; for (col = 0; col < cols; col++) m_bg_tilemap->set_scrolly(col, m_column_scroll); for (; col < 32; col++) m_bg_tilemap->set_scrolly(col, 0); } uint32_t marineb_state::screen_update_marineb(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { int offs; set_tilemap_scrolly(24); m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); /* draw the sprites */ for (offs = 0x0f; offs >= 0; offs--) { int gfx, sx, sy, code, col, flipx, flipy, offs2; if ((offs == 0) || (offs == 2)) continue; /* no sprites here */ if (offs < 8) offs2 = 0x0018 + offs; else offs2 = 0x03d8 - 8 + offs; code = m_videoram[offs2]; sx = m_videoram[offs2 + 0x20]; sy = m_colorram[offs2]; col = (m_colorram[offs2 + 0x20] & 0x0f) + 16 * m_palette_bank; flipx = code & 0x02; flipy = !(code & 0x01); if (offs < 4) { /* big sprite */ gfx = 2; code = (code >> 4) | ((code & 0x0c) << 2); } else { /* small sprite */ gfx = 1; code >>= 2; } if (!m_flipscreen_y) { sy = 256 - m_gfxdecode->gfx(gfx)->width() - sy; flipy = !flipy; } if (m_flipscreen_x) { sx++; } m_gfxdecode->gfx(gfx)->transpen(bitmap,cliprect, code, col, flipx,flipy, sx,sy,0); } return 0; } uint32_t marineb_state::screen_update_changes(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { int offs, sx, sy, code, col, flipx, flipy; set_tilemap_scrolly(26); m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); /* draw the small sprites */ for (offs = 0x05; offs >= 0; offs--) { int offs2; offs2 = 0x001a + offs; code = m_videoram[offs2]; sx = m_videoram[offs2 + 0x20]; sy = m_colorram[offs2]; col = (m_colorram[offs2 + 0x20] & 0x0f) + 16 * m_palette_bank; flipx = code & 0x02; flipy = !(code & 0x01); if (!m_flipscreen_y) { sy = 256 - m_gfxdecode->gfx(1)->width() - sy; flipy = !flipy; } if (m_flipscreen_x) { sx++; } m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code >> 2, col, flipx,flipy, sx,sy,0); } /* draw the big sprite */ code = m_videoram[0x3df]; sx = m_videoram[0x3ff]; sy = m_colorram[0x3df]; col = m_colorram[0x3ff]; flipx = code & 0x02; flipy = !(code & 0x01); if (!m_flipscreen_y) { sy = 256 - m_gfxdecode->gfx(2)->width() - sy; flipy = !flipy; } if (m_flipscreen_x) { sx++; } code >>= 4; m_gfxdecode->gfx(2)->transpen(bitmap,cliprect, code, col, flipx,flipy, sx,sy,0); /* draw again for wrap around */ m_gfxdecode->gfx(2)->transpen(bitmap,cliprect, code, col, flipx,flipy, sx-256,sy,0); return 0; } uint32_t marineb_state::screen_update_springer(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { int offs; set_tilemap_scrolly(0); m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); /* draw the sprites */ for (offs = 0x0f; offs >= 0; offs--) { int gfx, sx, sy, code, col, flipx, flipy, offs2; if ((offs == 0) || (offs == 2)) continue; /* no sprites here */ offs2 = 0x0010 + offs; code = m_videoram[offs2]; sx = 240 - m_videoram[offs2 + 0x20]; sy = m_colorram[offs2]; col = (m_colorram[offs2 + 0x20] & 0x0f) + 16 * m_palette_bank; flipx = !(code & 0x02); flipy = !(code & 0x01); if (offs < 4) { /* big sprite */ sx -= 0x10; gfx = 2; code = (code >> 4) | ((code & 0x0c) << 2); } else { /* small sprite */ gfx = 1; code >>= 2; } if (!m_flipscreen_y) { sy = 256 - m_gfxdecode->gfx(gfx)->width() - sy; flipy = !flipy; } if (!m_flipscreen_x) { sx--; } m_gfxdecode->gfx(gfx)->transpen(bitmap,cliprect, code, col, flipx,flipy, sx,sy,0); } return 0; } uint32_t marineb_state::screen_update_hoccer(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { int offs; set_tilemap_scrolly(0); m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); /* draw the sprites */ for (offs = 0x07; offs >= 0; offs--) { int sx, sy, code, col, flipx, flipy, offs2; offs2 = 0x0018 + offs; code = m_spriteram[offs2]; sx = m_spriteram[offs2 + 0x20]; sy = m_colorram[offs2]; col = m_colorram[offs2 + 0x20]; flipx = code & 0x02; flipy = !(code & 0x01); if (!m_flipscreen_y) { sy = 256 - m_gfxdecode->gfx(1)->width() - sy; flipy = !flipy; } if (m_flipscreen_x) { sx = 256 - m_gfxdecode->gfx(1)->width() - sx; flipx = !flipx; } m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code >> 2, col, flipx,flipy, sx,sy,0); } return 0; } uint32_t marineb_state::screen_update_hopprobo(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { int offs; set_tilemap_scrolly(0); m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); /* draw the sprites */ for (offs = 0x0f; offs >= 0; offs--) { int gfx, sx, sy, code, col, flipx, flipy, offs2; if ((offs == 0) || (offs == 2)) continue; /* no sprites here */ offs2 = 0x0010 + offs; code = m_videoram[offs2]; sx = m_videoram[offs2 + 0x20]; sy = m_colorram[offs2]; col = (m_colorram[offs2 + 0x20] & 0x0f) + 16 * m_palette_bank; flipx = code & 0x02; flipy = !(code & 0x01); if (offs < 4) { /* big sprite */ gfx = 2; code = (code >> 4) | ((code & 0x0c) << 2); } else { /* small sprite */ gfx = 1; code >>= 2; } if (!m_flipscreen_y) { sy = 256 - m_gfxdecode->gfx(gfx)->width() - sy; flipy = !flipy; } if (!m_flipscreen_x) { sx--; } m_gfxdecode->gfx(gfx)->transpen(bitmap,cliprect, code, col, flipx,flipy, sx,sy,0); } return 0; }