// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** Atari Rampart hardware ****************************************************************************/ #include "emu.h" #include "machine/atarigen.h" #include "video/atarimo.h" #include "includes/rampart.h" /************************************* * * Video system start * *************************************/ const atari_motion_objects_config rampart_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 */ {{ 0x00ff,0,0,0 }}, /* mask for the link */ {{ 0,0x7fff,0,0 }}, /* mask for the code index */ {{ 0,0,0x000f,0 }}, /* mask for the color */ {{ 0,0,0xff80,0 }}, /* mask for the X position */ {{ 0,0,0,0xff80 }}, /* mask for the Y position */ {{ 0,0,0,0x0070 }}, /* mask for the width, in tiles*/ {{ 0,0,0,0x0007 }}, /* mask for the height, in tiles */ {{ 0,0x8000,0,0 }}, /* mask for the horizontal flip */ {{ 0 }}, /* mask for the vertical flip */ {{ 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 rampart_state::video_start() { /* set the intial scroll offset */ m_mob->set_xscroll(-12); } /************************************* * * Main refresh * *************************************/ uint32_t rampart_state::screen_update_rampart(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { // start drawing m_mob->draw_async(cliprect); /* draw the playfield */ rampart_bitmap_render(bitmap, cliprect); // 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->min_y; y <= rect->max_y; y++) { uint16_t *mo = &mobitmap.pix16(y); uint16_t *pf = &bitmap.pix16(y); for (int x = rect->min_x; x <= rect->max_x; x++) if (mo[x] != 0xffff) { /* the PCB supports more complex priorities, but the PAL is not stuffed, so we get the default */ pf[x] = mo[x]; } } return 0; } /************************************* * * Bitmap rendering * *************************************/ void rampart_state::rampart_bitmap_render(bitmap_ind16 &bitmap, const rectangle &cliprect) { /* update any dirty scanlines */ for (int y = cliprect.min_y; y <= cliprect.max_y; y++) { const uint16_t *src = &m_bitmap[256 * y]; uint16_t *dst = &bitmap.pix16(y); /* regenerate the line */ for (int x = cliprect.min_x & ~1; x <= cliprect.max_x; x += 2) { int bits = src[(x - 8) / 2]; dst[x + 0] = bits >> 8; dst[x + 1] = bits & 0xff; } } }