26 lines
892 B
C
26 lines
892 B
C
#include "global.h"
|
|
|
|
void guS2DInitBg(uObjBg* bg) {
|
|
size_t size;
|
|
s32 tmem = (bg->b.imageFmt == G_IM_FMT_CI) ? 0x100 : 0x200;
|
|
u16 shift = (6 - bg->b.imageSiz);
|
|
|
|
if (bg->b.imageLoad == G_BGLT_LOADBLOCK) {
|
|
bg->b.tmemW = bg->b.imageW >> shift;
|
|
bg->b.tmemH = (tmem / bg->b.tmemW) * 4;
|
|
bg->b.tmemSizeW = bg->b.tmemW * 2;
|
|
bg->b.tmemSize = bg->b.tmemH * bg->b.tmemSizeW;
|
|
bg->b.tmemLoadSH = (bg->b.tmemSize >> 1) - 1;
|
|
bg->b.tmemLoadTH = (0x7FF / bg->b.tmemW) + 1;
|
|
} else { // G_BGLT_LOADTILE
|
|
bg->b.tmemW = (bg->b.frameW >> shift) + 3;
|
|
bg->b.tmemH = (tmem / bg->b.tmemW) * 4;
|
|
bg->b.tmemSizeW = (bg->b.imageW >> shift) * 2;
|
|
|
|
size = bg->b.tmemH * bg->b.tmemSizeW;
|
|
bg->b.tmemSize = (size >> 16);
|
|
bg->b.tmemLoadSH = (size >> 0) & 0xFFFF;
|
|
bg->b.tmemLoadTH = bg->b.tmemH - 1;
|
|
}
|
|
}
|