// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** Atari Vindicators hardware ****************************************************************************/ #include "emu.h" #include "includes/vindictr.h" /************************************* * * Tilemap callbacks * *************************************/ TILE_GET_INFO_MEMBER(vindictr_state::get_alpha_tile_info) { uint16_t data = m_alpha_tilemap->basemem_read(tile_index); int code = data & 0x3ff; int color = ((data >> 10) & 0x0f) | ((data >> 9) & 0x20); int opaque = data & 0x8000; SET_TILE_INFO_MEMBER(1, code, color, opaque ? TILE_FORCE_LAYER0 : 0); } TILE_GET_INFO_MEMBER(vindictr_state::get_playfield_tile_info) { uint16_t data = m_playfield_tilemap->basemem_read(tile_index); int code = (m_playfield_tile_bank * 0x1000) + (data & 0xfff); int color = 0x10 + 2 * ((data >> 12) & 7); SET_TILE_INFO_MEMBER(0, code, color, (data >> 15) & 1); } /************************************* * * Video system start * *************************************/ const atari_motion_objects_config vindictr_state::s_mob_config = { 0, /* index to which gfx system */ 1, /* number of motion object banks */ 1, /* are the entries linked? */ 0, /* are the entries split? */ 0, /* render in reverse order? */ 0, /* render in swapped X/Y order? */ 0, /* does the neighbor bit affect the next object? */ 8, /* pixels per SLIP entry (0 for no-slip) */ 0, /* pixel offset for SLIPs */ 0, /* maximum number of links to visit/scanline (0=all) */ 0x100, /* base palette entry */ 0x100, /* maximum number of colors */ 0, /* transparent pen index */ {{ 0,0,0,0x03ff }}, /* mask for the link */ {{ 0x7fff,0,0,0 }}, /* mask for the code index */ {{ 0,0x000f,0,0 }}, /* mask for the color */ {{ 0,0xff80,0,0 }}, /* mask for the X position */ {{ 0,0,0xff80,0 }}, /* mask for the Y position */ {{ 0,0,0x0038,0 }}, /* mask for the width, in tiles*/ {{ 0,0,0x0007,0 }}, /* mask for the height, in tiles */ {{ 0,0,0x0040,0 }}, /* mask for the horizontal flip */ {{ 0 }}, /* mask for the vertical flip */ {{ 0,0x0070,0,0 }}, /* mask for the priority */ {{ 0 }}, /* mask for the neighbor */ {{ 0 }}, /* mask for absolute coordinates */ {{ 0 }}, /* mask for the special value */ 0 /* resulting value to indicate "special" */ }; void vindictr_state::video_start() { /* save states */ save_item(NAME(m_playfield_tile_bank)); save_item(NAME(m_playfield_xscroll)); save_item(NAME(m_playfield_yscroll)); } /************************************* * * Palette RAM control * *************************************/ WRITE16_MEMBER( vindictr_state::vindictr_paletteram_w ) { static const int ztable[16] = { 0x0, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf, 0x10, 0x11 }; int c; /* first blend the data */ COMBINE_DATA(&m_paletteram[offset]); data = m_paletteram[offset]; /* now generate colors at all 16 intensities */ for (c = 0; c < 8; c++) { int i = ztable[((data >> 12) + (c * 2)) & 15]; int r = ((data >> 8) & 15) * i; int g = ((data >> 4) & 15) * i; int b = ((data >> 0) & 15) * i; m_palette->set_pen_color(offset + c*2048,rgb_t(r,g,b)); } } /************************************* * * Periodic scanline updater * *************************************/ void vindictr_state::scanline_update(screen_device &screen, int scanline) { int x; /* keep in range */ int offset = ((scanline - 8) / 8) * 64 + 42; if (offset < 0) offset += 0x7c0; else if (offset >= 0x7c0) return; /* update the current parameters */ for (x = 42; x < 64; x++) { uint16_t data = m_alpha_tilemap->basemem_read(offset++); switch ((data >> 9) & 7) { case 2: /* /PFB */ if (m_playfield_tile_bank != (data & 7)) { screen.update_partial(scanline - 1); m_playfield_tile_bank = data & 7; m_playfield_tilemap->mark_all_dirty(); } break; case 3: /* /PFHSLD */ if (m_playfield_xscroll != (data & 0x1ff)) { screen.update_partial(scanline - 1); m_playfield_tilemap->set_scrollx(0, data); m_playfield_xscroll = data & 0x1ff; } break; case 4: /* /MOHS */ if (m_mob->xscroll() != (data & 0x1ff)) { screen.update_partial(scanline - 1); m_mob->set_xscroll(data & 0x1ff); } break; case 5: /* /PFSPC */ break; case 6: /* /VIRQ */ scanline_int_write_line(1); break; case 7: /* /PFVS */ { /* a new vscroll latches the offset into a counter; we must adjust for this */ int offset = scanline; const rectangle &visible_area = screen.visible_area(); if (offset > visible_area.bottom()) offset -= visible_area.bottom() + 1; if (m_playfield_yscroll != ((data - offset) & 0x1ff)) { screen.update_partial(scanline - 1); m_playfield_tilemap->set_scrolly(0, data - offset); m_mob->set_yscroll((data - offset) & 0x1ff); } break; } } } } /************************************* * * Main refresh * *************************************/ uint32_t vindictr_state::screen_update_vindictr(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { // start drawing m_mob->draw_async(cliprect); /* draw the playfield */ m_playfield_tilemap->draw(screen, bitmap, cliprect, 0, 0); // draw and merge the MO bitmap_ind16 &mobitmap = m_mob->bitmap(); for (const sparse_dirty_rect *rect = m_mob->first_dirty_rect(cliprect); rect != nullptr; rect = rect->next()) for (int y = rect->top(); y <= rect->bottom(); y++) { uint16_t *mo = &mobitmap.pix16(y); uint16_t *pf = &bitmap.pix16(y); for (int x = rect->left(); x <= rect->right(); x++) if (mo[x] != 0xffff) { /* partially verified via schematics (there are a lot of PALs involved!): SHADE = PAL(MPR1-0, LB7-0, PFX6-5, PFX3-2, PF/M) if (SHADE) CRA |= 0x100 MOG3-1 = ~MAT3-1 if MAT6==1 and MSD3==1 */ int mopriority = mo[x] >> atari_motion_objects_device::PRIORITY_SHIFT; /* upper bit of MO priority signals special rendering and doesn't draw anything */ if (mopriority & 4) continue; /* MO pen 1 doesn't draw, but it sets the SHADE flag and bumps the palette offset */ if ((mo[x] & 0x0f) == 1) { if ((mo[x] & 0xf0) != 0) pf[x] |= 0x100; } else pf[x] = mo[x] & atari_motion_objects_device::DATA_MASK; /* don't erase yet -- we need to make another pass later */ } } /* add the alpha on top */ m_alpha_tilemap->draw(screen, bitmap, cliprect, 0, 0); /* now go back and process the upper bit of MO priority */ for (const sparse_dirty_rect *rect = m_mob->first_dirty_rect(cliprect); rect != nullptr; rect = rect->next()) for (int y = rect->top(); y <= rect->bottom(); y++) { uint16_t *mo = &mobitmap.pix16(y); uint16_t *pf = &bitmap.pix16(y); for (int x = rect->left(); x <= rect->right(); x++) if (mo[x] != 0xffff) { int mopriority = mo[x] >> atari_motion_objects_device::PRIORITY_SHIFT; /* upper bit of MO priority might mean palette kludges */ if (mopriority & 4) { /* if bit 2 is set, start setting high palette bits */ if (mo[x] & 2) m_mob->apply_stain(bitmap, pf, mo, x, y); /* if the upper bit of pen data is set, we adjust the final intensity */ if (mo[x] & 8) pf[x] |= (~mo[x] & 0xe0) << 6; } } } return 0; }