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fix transparency issue in metroid fusion

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This commit is contained in:
Daryl Borth 2019-01-15 21:19:42 -07:00
parent 09bdc46135
commit b0cbed213c
1 changed files with 20 additions and 38 deletions
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58
source/vba/gba/Mode0.cpp
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@ -324,45 +324,27 @@ void mode0RenderLineNoWindow()
} else {
// semi-transparent OBJ
u32 back = backdrop;
u8 top2 = 0x20;
u8 top2 = 0x20;
//--DCN
// This is pretty much the exact same result:
// line1[x] < (back & 0xFF000000)
//
// (u8)(line0[x]>>24) < (u8)(back >> 24)
//
// The only difference is that the first is stored in a u32,
// and the second is stored in a u8
//*
u8 li0 = (u8)(line0[x]>>24);
u8 li1 = (u8)(line1[x]>>24);
u8 li2 = (u8)(line2[x]>>24);
u8 li3 = (u8)(line3[x]>>24);
u8 r = (li1 < li0) ? (li1) : (li0);
if(li2 < r) {
r = (li3 < li2) ? (li3) : (li2);
}else if(li3 < r){
r = (li3);
}
if(r < (u8)(color >> 24)) {
if(r == li0){
back = line0[x];
top2 = 0x01;
}else if(r == li1){
back = line1[x];
top2 = 0x02;
}else if(r == li2){
back = line2[x];
top2 = 0x04;
}else if(r == li3){
back = line3[x];
top2 = 0x08;
}
}
if(line0[x] < back) {
back = line0[x];
top2 = 0x01;
}
if(line1[x] < (back & 0xFF000000)) {
back = line1[x];
top2 = 0x02;
}
if(line2[x] < (back & 0xFF000000)) {
back = line2[x];
top2 = 0x04;
}
if(line3[x] < (back & 0xFF000000)) {
back = line3[x];
top2 = 0x08;
}
if(top2 & (BLDMOD>>8))
color = gfxAlphaBlend(color, back,