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Fix overplane

This commit is contained in:
Guy Perfect 2024-10-26 15:04:27 -05:00
parent 67bcb6d508
commit da001e02cd
1 changed files with 7 additions and 6 deletions
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9
core/vip.c
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@ -72,7 +72,7 @@ typedef struct {
int32_t bottom, top; /* Window bounds */
int32_t gx, gp, gy; /* World screen position */
int32_t mx, mp, my; /* Background scroll */
int32_t over; /* Overplane flag */
uint8_t *over; /* Overplane character */
uint32_t params; /* Line parameters address */
int32_t scx, scy; /* Background dimensions */
int32_t w, h; /* Window size */
@ -682,7 +682,8 @@ static int vipParseWorld(VB*sim,uint8_t*world,uint16_t bits,WorldAttribs*attr){
attr->bg = (uint8_t *) BG_TEMPLATES[bits >> 8 & 15];
attr->gx = SignExtend(busReadBuffer(world + 2, VB_U16), 10);
attr->gp = SignExtend(busReadBuffer(world + 4, VB_U16), 10);
attr->over = bits >> 7 & 1;
attr->over = (bits & 0x0080) == 0 ? NULL :
&sim->vip.ram[0x00020000 | busReadBuffer(world + 10, VB_U16) << 1];
attr->scx = bits >> 10 & 3;
attr->scy = bits >> 8 & 3;
attr->bgw = (1 << attr->scx) - 1;
@ -886,10 +887,10 @@ static void vipDrawWorld(VB *sim, uint8_t *world, uint16_t bits) {
bx < 0 || bx > wttr.bgw ||
by < 0 || by > wttr.bgh
) {
if (wttr.over)
continue; /* TODO: Research overplane */
if (wttr.over == NULL) {
bx &= wttr.bgw;
by &= wttr.bgh;
} else cell = wttr.over;
}
/* Locate the cell in the BG map */