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-rw-r--r--src/mame/video/klax.c133
1 files changed, 133 insertions, 0 deletions
diff --git a/src/mame/video/klax.c b/src/mame/video/klax.c
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+++ b/src/mame/video/klax.c
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+/***************************************************************************
+
+ Atari Klax hardware
+
+****************************************************************************/
+
+#include "driver.h"
+#include "machine/atarigen.h"
+#include "klax.h"
+
+
+
+/*************************************
+ *
+ * Tilemap callbacks
+ *
+ *************************************/
+
+static TILE_GET_INFO( get_playfield_tile_info )
+{
+ UINT16 data1 = atarigen_playfield[tile_index];
+ UINT16 data2 = atarigen_playfield_upper[tile_index] >> 8;
+ int code = data1 & 0x1fff;
+ int color = data2 & 0x0f;
+ SET_TILE_INFO(0, code, color, (data1 >> 15) & 1);
+}
+
+
+
+/*************************************
+ *
+ * Video system start
+ *
+ *************************************/
+
+VIDEO_START( klax )
+{
+ 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? */
+ 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) */
+
+ 0x000, /* base palette entry */
+ 0x100, /* maximum number of colors */
+ 0, /* transparent pen index */
+
+ {{ 0x00ff,0,0,0 }}, /* mask for the link */
+ {{ 0 }}, /* mask for the graphics bank */
+ {{ 0,0x0fff,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 */
+ {{ 0,0,0,0x0008 }}, /* 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" */
+ 0 /* 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, 64,32);
+
+ /* initialize the motion objects */
+ atarimo_init(machine, 0, &modesc);
+}
+
+
+
+/*************************************
+ *
+ * Latch write handler
+ *
+ *************************************/
+
+WRITE16_HANDLER( klax_latch_w )
+{
+}
+
+
+
+/*************************************
+ *
+ * Main refresh
+ *
+ *************************************/
+
+VIDEO_UPDATE( klax )
+{
+ 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])
+ {
+ /* verified from schematics:
+
+ PFPRI if (PFS7-4 == 0 || LBPIX3-0 == 0)
+ */
+ if ((pf[x] & 0xf0) != 0xf0)
+ pf[x] = mo[x];
+
+ /* erase behind ourselves */
+ mo[x] = 0;
+ }
+ }
+ return 0;
+}