summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/video/funybubl.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/mame/video/funybubl.c')
-rw-r--r--src/mame/video/funybubl.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/src/mame/video/funybubl.c b/src/mame/video/funybubl.c
new file mode 100644
index 00000000000..e6f6b3d4344
--- /dev/null
+++ b/src/mame/video/funybubl.c
@@ -0,0 +1,116 @@
+/* Funny Bubble Video hardware
+
+todo - convert to tilemap
+
+ */
+
+
+#include "driver.h"
+
+UINT8* funybubl_banked_videoram;
+UINT8 *funybubl_paletteram;
+
+
+WRITE8_HANDLER ( funybubl_paldatawrite )
+{
+ int colchanged ;
+
+ UINT32 coldat;
+
+ funybubl_paletteram[offset] = data;
+
+ colchanged = offset >> 2;
+
+ coldat = funybubl_paletteram[colchanged*4] | (funybubl_paletteram[colchanged*4+1] << 8) | (funybubl_paletteram[colchanged*4+2] << 16) | (funybubl_paletteram[colchanged*4+3] << 24);
+
+ palette_set_color_rgb(Machine,colchanged,pal6bit(coldat >> 12),pal6bit(coldat >> 0),pal6bit(coldat >> 6));
+}
+
+
+VIDEO_START(funybubl)
+{
+}
+
+static void draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect )
+{
+
+
+ UINT8 *source = &funybubl_banked_videoram[0x2000-0x20];
+ UINT8 *finish = source - 0x1000;
+
+
+ while( source>finish )
+ {
+ int xpos, ypos, tile;
+
+ /* the sprites are in the sprite list twice
+ the first format (in comments) appears to be a buffer, if you use
+ this list you get garbage sprites in 2 player mode
+ the second format (used) seems correct
+
+ */
+/*
+ ypos = 0xff-source[1+0x10];
+ xpos = source[2+0x10];
+ tile = source[0+0x10] | ( (source[3+0x10] & 0x0f) <<8);
+ if (source[3+0x10] & 0x80) tile += 0x1000;
+ if (source[3+0x10] & 0x20) xpos += 0x100;
+ // bits 0x40 (not used?) and 0x10 (just set during transition period of x co-ord 0xff and 0x00) ...
+ xpos -= 8;
+ ypos -= 14;
+
+*/
+ ypos = source[2];
+ xpos = source[3];
+ tile = source[0] | ( (source[1] & 0x0f) <<8);
+ if (source[1] & 0x80) tile += 0x1000;
+ if (source[1] & 0x20) { if (xpos < 0xe0) xpos += 0x100; }
+ // bits 0x40 and 0x10 not used?...
+
+ drawgfx(bitmap,machine->gfx[1],tile,0,0,0,xpos,ypos,cliprect,TRANSPARENCY_PEN,255);
+
+ source -= 0x20;
+ }
+
+}
+
+
+VIDEO_UPDATE(funybubl)
+{
+ int x,y, offs;
+
+ offs = 0;
+
+ fillbitmap(bitmap, get_black_pen(machine), cliprect);
+
+
+ /* tilemap .. convert it .. banking makes it slightly more annoying but still easy */
+ for (y = 0; y < 32; y++)
+ {
+ for (x = 0; x< 64; x++)
+ {
+ int data;
+
+ data = funybubl_banked_videoram[offs] | (funybubl_banked_videoram[offs+1] << 8);
+ drawgfx(bitmap,machine->gfx[0],data&0x7fff,(data&0x8000)?2:1,0,0,x*8,y*8,cliprect,TRANSPARENCY_PEN,0);
+ offs+=2;
+ }
+ }
+
+ draw_sprites(machine,bitmap,cliprect);
+
+/*
+ if ( input_code_pressed_once(KEYCODE_W) )
+ {
+ FILE *fp;
+
+ fp=fopen("funnybubsprites", "w+b");
+ if (fp)
+ {
+ fwrite(&funybubl_banked_videoram[0x1000], 0x1000, 1, fp);
+ fclose(fp);
+ }
+ }
+*/
+ return 0;
+}