// license:BSD-3-Clause // copyright-holders:Quench /* Toaplan Sprite Controller 'SCU' used by video/twincobr.cpp (including wardner) and rallybik in toaplan1.cpp */ #include "emu.h" #include "toaplan_scu.h" #include "screen.h" DEFINE_DEVICE_TYPE(TOAPLAN_SCU, toaplan_scu_device, "toaplan_scu", "Toaplan SCU") const gfx_layout toaplan_scu_device::spritelayout = { 16,16, /* 16*16 sprites */ RGN_FRAC(1,4), 4, /* 4 bits per pixel */ { RGN_FRAC(0,4), RGN_FRAC(1,4), RGN_FRAC(2,4), RGN_FRAC(3,4) }, { STEP16(0, 1) }, { STEP16(0, 16) }, 16*16 }; GFXDECODE_MEMBER( toaplan_scu_device::gfxinfo ) GFXDECODE_DEVICE( DEVICE_SELF, 0, spritelayout, 0, 64 ) GFXDECODE_END toaplan_scu_device::toaplan_scu_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : device_t(mconfig, TOAPLAN_SCU, tag, owner, clock) , device_gfx_interface(mconfig, *this, gfxinfo) , device_video_interface(mconfig, *this) , m_pri_cb(*this) { } void toaplan_scu_device::device_start() { m_pri_cb.resolve(); } void toaplan_scu_device::device_reset() { } /*************************************************************************** Sprite Handlers ***************************************************************************/ template void toaplan_scu_device::draw_sprites_common(BitmapClass &bitmap, const rectangle &cliprect, u16* spriteram, u32 bytes) { for (int offs = (bytes / 2) - 4; offs >= 0; offs -= 4) { const u16 attribute = spriteram[offs + 1]; const int priority = (attribute & 0x0c00) >> 10; // are 0 priority really skipped, or can they still mask? if (!priority) continue; const int sy = spriteram[offs + 3] >> 7; if (sy != 0x0100) /* sx = 0x01a0 or 0x0040*/ { const u32 sprite = spriteram[offs] & 0x7ff; u32 color = attribute & 0x3f; u32 pri_mask = 0; // priority mask if (!m_pri_cb.isnull()) m_pri_cb(priority, pri_mask); int sx = spriteram[offs + 2] >> 7; const int flipx = attribute & 0x100; if (flipx) sx -= m_xoffs_flipped; const int flipy = attribute & 0x200; gfx(0)->prio_transpen(bitmap, cliprect, sprite, color, flipx, flipy, sx - m_xoffs, sy - 16, screen().priority(), pri_mask, 0); } } } void toaplan_scu_device::draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect, u16* spriteram, u32 bytes) { draw_sprites_common(bitmap, cliprect, spriteram, bytes); } void toaplan_scu_device::draw_sprites(bitmap_rgb32 &bitmap, const rectangle &cliprect, u16* spriteram, u32 bytes) { draw_sprites_common(bitmap, cliprect, spriteram, bytes); }