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-rw-r--r--src/mame/video/badlands.c147
1 files changed, 147 insertions, 0 deletions
diff --git a/src/mame/video/badlands.c b/src/mame/video/badlands.c
new file mode 100644
index 00000000000..0920d05c388
--- /dev/null
+++ b/src/mame/video/badlands.c
@@ -0,0 +1,147 @@
+/***************************************************************************
+
+ Atari Bad Lands hardware
+
+***************************************************************************/
+
+#include "driver.h"
+#include "machine/atarigen.h"
+#include "includes/badlands.h"
+
+
+
+/*************************************
+ *
+ * Local variables
+ *
+ *************************************/
+
+static UINT8 playfield_tile_bank;
+
+
+
+/*************************************
+ *
+ * Tilemap callbacks
+ *
+ *************************************/
+
+static TILE_GET_INFO( get_playfield_tile_info )
+{
+ UINT16 data = atarigen_playfield[tile_index];
+ int code = (data & 0x1fff) + ((data & 0x1000) ? (playfield_tile_bank << 12) : 0);
+ int color = (data >> 13) & 0x07;
+ SET_TILE_INFO(0, code, color, 0);
+}
+
+
+
+/*************************************
+ *
+ * Generic video system start
+ *
+ *************************************/
+
+VIDEO_START( badlands )
+{
+ static const struct atarimo_desc modesc =
+ {
+ 1, /* index to which gfx system */
+ 1, /* number of motion object banks */
+ 0, /* are the entries linked? */
+ 1, /* 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? */
+ 0, /* pixels per SLIP entry (0 for no-slip) */
+ 0, /* pixel offset for SLIPs */
+ 0, /* maximum number of links to visit/scanline (0=all) */
+
+ 0x80, /* base palette entry */
+ 0x80, /* maximum number of colors */
+ 0, /* transparent pen index */
+
+ {{ 0x1f }}, /* mask for the link */
+ {{ 0 }}, /* mask for the graphics bank */
+ {{ 0x0fff,0,0,0 }}, /* mask for the code index */
+ {{ 0 }}, /* mask for the upper code index */
+ {{ 0,0,0,0x0007 }}, /* mask for the color */
+ {{ 0,0,0,0xff80 }}, /* mask for the X position */
+ {{ 0,0xff80,0,0 }}, /* mask for the Y position */
+ {{ 0 }}, /* mask for the width, in tiles*/
+ {{ 0,0x000f,0,0 }}, /* mask for the height, in tiles */
+ {{ 0 }}, /* mask for the horizontal flip */
+ {{ 0 }}, /* mask for the vertical flip */
+ {{ 0,0,0,0x0008 }}, /* 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" */
+ 0 /* callback routine for special entries */
+ };
+
+ /* initialize the playfield */
+ atarigen_playfield_tilemap = tilemap_create(get_playfield_tile_info, tilemap_scan_rows, TILEMAP_TYPE_PEN, 8,8, 64,32);
+
+ /* initialize the motion objects */
+ atarimo_init(machine, 0, &modesc);
+}
+
+
+
+/*************************************
+ *
+ * Playfield bank write handler
+ *
+ *************************************/
+
+WRITE16_HANDLER( badlands_pf_bank_w )
+{
+ if (ACCESSING_LSB)
+ if (playfield_tile_bank != (data & 1))
+ {
+ video_screen_update_partial(0, video_screen_get_vpos(0));
+ playfield_tile_bank = data & 1;
+ tilemap_mark_all_tiles_dirty(atarigen_playfield_tilemap);
+ }
+}
+
+
+
+/*************************************
+ *
+ * Main refresh
+ *
+ *************************************/
+
+VIDEO_UPDATE( badlands )
+{
+ struct atarimo_rect_list rectlist;
+ mame_bitmap *mobitmap;
+ int x, y, r;
+
+ /* draw the playfield */
+ tilemap_draw(bitmap, cliprect, atarigen_playfield_tilemap, 0, 0);
+
+ /* 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;
+ for (x = rectlist.rect->min_x; x <= rectlist.rect->max_x; x++)
+ if (mo[x])
+ {
+ /* not yet verified
+ */
+ if ((mo[x] & ATARIMO_PRIORITY_MASK) || !(pf[x] & 8))
+ pf[x] = mo[x] & ATARIMO_DATA_MASK;
+
+ /* erase behind ourselves */
+ mo[x] = 0;
+ }
+ }
+ return 0;
+}