diff options
Diffstat (limited to 'src/mame/video/batman.c')
-rw-r--r-- | src/mame/video/batman.c | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/src/mame/video/batman.c b/src/mame/video/batman.c new file mode 100644 index 00000000000..0ad8499ccff --- /dev/null +++ b/src/mame/video/batman.c @@ -0,0 +1,311 @@ +/*************************************************************************** + + Atari Batman hardware + +****************************************************************************/ + +#include "driver.h" +#include "machine/atarigen.h" +#include "batman.h" +#include "thunderj.h" + + + +/************************************* + * + * Globals + * + *************************************/ + +UINT8 batman_alpha_tile_bank; + + + +/************************************* + * + * Tilemap callbacks + * + *************************************/ + +static TILE_GET_INFO( get_alpha_tile_info ) +{ + UINT16 data = atarigen_alpha[tile_index]; + int code = ((data & 0x400) ? (batman_alpha_tile_bank * 0x400) : 0) + (data & 0x3ff); + int color = (data >> 11) & 0x0f; + int opaque = data & 0x8000; + SET_TILE_INFO(2, code, color, opaque ? TILE_FORCE_LAYER0 : 0); +} + + +static TILE_GET_INFO( get_playfield_tile_info ) +{ + UINT16 data1 = atarigen_playfield[tile_index]; + UINT16 data2 = atarigen_playfield_upper[tile_index] & 0xff; + int code = data1 & 0x7fff; + int color = 0x10 + (data2 & 0x0f); + SET_TILE_INFO(0, code, color, (data1 >> 15) & 1); + tileinfo->category = (data2 >> 4) & 3; +} + + +static TILE_GET_INFO( get_playfield2_tile_info ) +{ + UINT16 data1 = atarigen_playfield2[tile_index]; + UINT16 data2 = atarigen_playfield_upper[tile_index] >> 8; + int code = data1 & 0x7fff; + int color = data2 & 0x0f; + SET_TILE_INFO(0, code, color, (data1 >> 15) & 1); + tileinfo->category = (data2 >> 4) & 3; +} + + + +/************************************* + * + * Video system start + * + *************************************/ + +VIDEO_START( batman ) +{ + static const struct atarimo_desc modesc = + { + 1, /* index to which gfx system */ + 1, /* number of motion object banks */ + 1, /* are the entries linked? */ + 0, /* are the entries split? */ + 1, /* 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 */ + + {{ 0x03ff,0,0,0 }}, /* mask for the link */ + {{ 0 }}, /* mask for the graphics bank */ + {{ 0,0x7fff,0,0 }}, /* mask for the code index */ + {{ 0 }}, /* mask for the upper 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 */ + {{ 0,0,0x0070,0 }}, /* 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" */ + NULL /* callback routine for special entries */ + }; + + /* initialize the playfield */ + atarigen_playfield_tilemap = tilemap_create(get_playfield_tile_info, tilemap_scan_cols, TILEMAP_TYPE_PEN, 8,8, 64,64); + + /* initialize the second playfield */ + atarigen_playfield2_tilemap = tilemap_create(get_playfield2_tile_info, tilemap_scan_cols, TILEMAP_TYPE_PEN, 8,8, 64,64); + tilemap_set_transparent_pen(atarigen_playfield2_tilemap, 0); + + /* initialize the motion objects */ + atarimo_init(machine, 0, &modesc); + + /* initialize the alphanumerics */ + atarigen_alpha_tilemap = tilemap_create(get_alpha_tile_info, tilemap_scan_rows, TILEMAP_TYPE_PEN, 8,8, 64,32); + tilemap_set_transparent_pen(atarigen_alpha_tilemap, 0); +} + + + +/************************************* + * + * Periodic scanline updater + * + *************************************/ + +void batman_scanline_update(running_machine *machine, int scrnum, int scanline) +{ + /* update the scanline parameters */ + if (scanline <= machine->screen[scrnum].visarea.max_y && atarivc_state.rowscroll_enable) + { + UINT16 *base = &atarigen_alpha[scanline / 8 * 64 + 48]; + int scan, i; + + for (scan = 0; scan < 8; scan++, scanline++) + for (i = 0; i < 2; i++) + { + int data = *base++; + switch (data & 15) + { + case 9: + video_screen_update_partial(0, scanline - 1); + atarivc_state.mo_xscroll = (data >> 7) & 0x1ff; + atarimo_set_xscroll(0, atarivc_state.mo_xscroll); + break; + + case 10: + video_screen_update_partial(0, scanline - 1); + atarivc_state.pf1_xscroll_raw = (data >> 7) & 0x1ff; + atarivc_update_pf_xscrolls(); + tilemap_set_scrollx(atarigen_playfield_tilemap, 0, atarivc_state.pf0_xscroll); + tilemap_set_scrollx(atarigen_playfield2_tilemap, 0, atarivc_state.pf1_xscroll); + break; + + case 11: + video_screen_update_partial(0, scanline - 1); + atarivc_state.pf0_xscroll_raw = (data >> 7) & 0x1ff; + atarivc_update_pf_xscrolls(); + tilemap_set_scrollx(atarigen_playfield_tilemap, 0, atarivc_state.pf0_xscroll); + break; + + case 13: + video_screen_update_partial(0, scanline - 1); + atarivc_state.mo_yscroll = (data >> 7) & 0x1ff; + atarimo_set_yscroll(0, atarivc_state.mo_yscroll); + break; + + case 14: + video_screen_update_partial(0, scanline - 1); + atarivc_state.pf1_yscroll = (data >> 7) & 0x1ff; + tilemap_set_scrolly(atarigen_playfield2_tilemap, 0, atarivc_state.pf1_yscroll); + break; + + case 15: + video_screen_update_partial(0, scanline - 1); + atarivc_state.pf0_yscroll = (data >> 7) & 0x1ff; + tilemap_set_scrolly(atarigen_playfield_tilemap, 0, atarivc_state.pf0_yscroll); + break; + } + } + } +} + + + +/************************************* + * + * Main refresh + * + *************************************/ + +VIDEO_UPDATE( batman ) +{ + struct atarimo_rect_list rectlist; + mame_bitmap *mobitmap; + int x, y, r; + + /* draw the playfield */ + fillbitmap(priority_bitmap, 0, cliprect); + tilemap_draw(bitmap, cliprect, atarigen_playfield_tilemap, 0, 0x00); + tilemap_draw(bitmap, cliprect, atarigen_playfield_tilemap, 1, 0x01); + tilemap_draw(bitmap, cliprect, atarigen_playfield_tilemap, 2, 0x02); + tilemap_draw(bitmap, cliprect, atarigen_playfield_tilemap, 3, 0x03); + tilemap_draw(bitmap, cliprect, atarigen_playfield2_tilemap, 0, 0x80); + tilemap_draw(bitmap, cliprect, atarigen_playfield2_tilemap, 1, 0x84); + tilemap_draw(bitmap, cliprect, atarigen_playfield2_tilemap, 2, 0x88); + tilemap_draw(bitmap, cliprect, atarigen_playfield2_tilemap, 3, 0x8c); + + /* draw and merge the MO */ + mobitmap = atarimo_render(machine, 0, cliprect, &rectlist); + for (r = 0; r < rectlist.numrects; r++, rectlist.rect++) + for (y = rectlist.rect->min_y; y <= rectlist.rect->max_y; y++) + { + UINT16 *mo = (UINT16 *)mobitmap->base + mobitmap->rowpixels * y; + UINT16 *pf = (UINT16 *)bitmap->base + bitmap->rowpixels * y; + UINT8 *pri = (UINT8 *)priority_bitmap->base + priority_bitmap->rowpixels * y; + for (x = rectlist.rect->min_x; x <= rectlist.rect->max_x; x++) + if (mo[x]) + { + /* verified on real hardware: + + for all MO colors, MO priority 0: + obscured by low fg playfield pens priority 1-3 + obscured by high fg playfield pens priority 3 only + obscured by bg playfield priority 3 only + + for all MO colors, MO priority 1: + obscured by low fg playfield pens priority 2-3 + obscured by high fg playfield pens priority 3 only + obscured by bg playfield priority 3 only + + for all MO colors, MO priority 2-3: + obscured by low fg playfield pens priority 3 only + obscured by high fg playfield pens priority 3 only + obscured by bg playfield priority 3 only + */ + int mopriority = mo[x] >> ATARIMO_PRIORITY_SHIFT; + + /* upper bit of MO priority signals special rendering and doesn't draw anything */ + if (mopriority & 4) + continue; + + /* foreground playfield case */ + if (pri[x] & 0x80) + { + int pfpriority = (pri[x] >> 2) & 3; + + /* playfield priority 3 always wins */ + if (pfpriority == 3) + ; + + /* priority is consistent for upper pens in playfield */ + else if (pf[x] & 0x08) + pf[x] = mo[x] & ATARIMO_DATA_MASK; + + /* otherwise, we need to compare */ + else if (mopriority >= pfpriority) + pf[x] = mo[x] & ATARIMO_DATA_MASK; + } + + /* background playfield case */ + else + { + int pfpriority = pri[x] & 3; + + /* playfield priority 3 always wins */ + if (pfpriority == 3) + ; + + /* otherwise, MOs get shown */ + else + pf[x] = mo[x] & ATARIMO_DATA_MASK; + } + + /* don't erase yet -- we need to make another pass later */ + } + } + + /* add the alpha on top */ + tilemap_draw(bitmap, cliprect, atarigen_alpha_tilemap, 0, 0); + + /* now go back and process the upper bit of MO priority */ + rectlist.rect -= rectlist.numrects; + for (r = 0; r < rectlist.numrects; r++, rectlist.rect++) + for (y = rectlist.rect->min_y; y <= rectlist.rect->max_y; y++) + { + UINT16 *mo = (UINT16 *)mobitmap->base + mobitmap->rowpixels * y; + UINT16 *pf = (UINT16 *)bitmap->base + bitmap->rowpixels * y; + for (x = rectlist.rect->min_x; x <= rectlist.rect->max_x; x++) + if (mo[x]) + { + int mopriority = mo[x] >> ATARIMO_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) + thunderj_mark_high_palette(bitmap, pf, mo, x, y); + } + + /* erase behind ourselves */ + mo[x] = 0; + } + } + return 0; +} |