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popobear - sprite<->sprite priority handling (used to keep character line in order)

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This commit is contained in:
David Haywood 2013-03-13 21:19:04 +00:00
parent 6621b43d9f
commit ee1c2e5fed
1 changed files with 46 additions and 33 deletions
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79
src/mame/drivers/popobear.c
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@ -238,50 +238,63 @@ void popobear_state::draw_sprites(bitmap_ind16 &bitmap,const rectangle &cliprect
/*
???? ---- ---- ---- unused?
---- xxxx ---- ---- priority?
---- xxxx ---- ---- priority (against other sprites! used to keep the line of characters following you in order)
---- ---- x--- ---- Y direction
---- ---- -x-- ---- X direction
---- ---- --xx ---- size (height & width)
---- ---- ---- xx-- color bank
---- ---- ---- --xx ??
---- ---- ---- --x- NOT set on the enemy character / characters in your line
---- ---- ---- ---x set on opposite to above?
*/
/* 0x106 = 8 x 8 */
/* 0x*29 = 32 x 32 */
for(i = 0x800-8;i >= 0; i-=8)
for (int drawpri = 0xf;drawpri>=0x0;drawpri--)
{
int y = vram[i+0x7f800+2]|(vram[i+0x7f800+3]<<8);
int x = vram[i+0x7f800+4]|(vram[i+0x7f800+5]<<8);
int spr_num = vram[i+0x7f800+6]|(vram[i+0x7f800+7]<<8);
int param = vram[i+0x7f800+0]|(vram[i+0x7f800+1]<<8);
int width = 8 << ((param & 0x30)>>4);
int height = width; // sprites are always square?
int color_bank = ((param & 0xc)<<4);
int x_dir = param & 0x40;
int y_dir = param & 0x80;
if (x&0x8000) x-= 0x10000;
if (y&0x8000) y-= 0x10000;
if(param == 0)
continue;
spr_num <<= 3;
for(int yi=0;yi<height;yi++)
/* 0x106 = 8 x 8 */
/* 0x*29 = 32 x 32 */
for(i = 0x800-8;i >= 0; i-=8)
{
int y_draw = (y_dir) ? y+(height - yi) : y+yi;
int y = vram[i+0x7f800+2]|(vram[i+0x7f800+3]<<8);
int x = vram[i+0x7f800+4]|(vram[i+0x7f800+5]<<8);
int spr_num = vram[i+0x7f800+6]|(vram[i+0x7f800+7]<<8);
int param = vram[i+0x7f800+0]|(vram[i+0x7f800+1]<<8);
int pri = (param & 0x0f00)>>8;
// we do this because it's sprite<->sprite priority,
if (pri!=drawpri)
continue;
for(int xi=0;xi<width;xi++)
int width = 8 << ((param & 0x30)>>4);
int height = width; // sprites are always square?
int color_bank = ((param & 0xc)<<4);
int x_dir = param & 0x40;
int y_dir = param & 0x80;
if (x&0x8000) x-= 0x10000;
if (y&0x8000) y-= 0x10000;
if (param&0xf000) color_bank = (machine().rand() & 0x3);
if(param == 0)
continue;
spr_num <<= 3;
for(int yi=0;yi<height;yi++)
{
UINT8 pix = (vram[spr_num^1] & 0xff);
int x_draw = (x_dir) ? x+(width - xi) : x+xi;
int y_draw = (y_dir) ? y+((height-1) - yi) : y+yi;
if(cliprect.contains(x_draw, y_draw) && pix)
bitmap.pix16(y_draw, x_draw) = machine().pens[pix+0x100+color_bank];
for(int xi=0;xi<width;xi++)
{
UINT8 pix = (vram[spr_num^1] & 0xff);
int x_draw = (x_dir) ? x+((width-1) - xi) : x+xi;
spr_num++;
if(cliprect.contains(x_draw, y_draw) && pix)
bitmap.pix16(y_draw, x_draw) = machine().pens[pix+0x100+color_bank];
spr_num++;
}
}
}
}