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True match sub_08080278 #669

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merged 2 commits into from
Dec 27, 2023
Merged

True match sub_08080278 #669

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b48d5fc
True match sub_08080278
tonyjih Dec 27, 2023
a42263c
Fix warning
tonyjih Dec 27, 2023
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85 changes: 32 additions & 53 deletions src/scroll.c
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Original file line number Diff line number Diff line change
Expand Up @@ -419,64 +419,43 @@ void sub_080801BC(RoomControls* controls) {
}

u32 sub_08080278(void) {
u32 width;
u32 height;
u32 tilePos;
u16* bottomMapDataPtr;
u16* topMapDataPtr;
u32 result;
u16* bottomMapDataClonePtr;
u16* topMapDataClonePtr;
u32 indexX;
FORCE_REGISTER(u32 indexY, r10);
int iVar10;
u16* ptr1;
u32 tmp;
u16* ptr1 = (u16*)gUnk_02022830;
u16* mapBottomData = gMapBottom.mapData;
u16* mapTopData = gMapTop.mapData;
u16* mapBottomDataClone = gMapBottom.mapDataClone;
u16* mapTopDataClone = gMapTop.mapDataClone;
u32 width = gRoomControls.width >> 4;
u32 height = (gRoomControls.height >> 4) << 6;

ptr1 = (u16*)gUnk_02022830;
width = gRoomControls.width >> 4;
height = (gRoomControls.height >> 4) << 6;
result = 0;
indexY = 0;
if (result < height) {
iVar10 = 0;
do {
indexX = 0;
if (indexX < width) {
topMapDataPtr = (u16*)((int)gMapTop.mapData + iVar10);
topMapDataClonePtr = (u16*)((int)gMapTop.mapDataClone + iVar10);
bottomMapDataPtr = (u16*)((int)gMapBottom.mapData + iVar10);
bottomMapDataClonePtr = (u16*)((int)gMapBottom.mapDataClone + iVar10);
while (indexX < width) {
tilePos = indexY + indexX;
if ((bottomMapDataClonePtr[0] != bottomMapDataPtr[0]) && (bottomMapDataPtr[0] < 0x4000)) {
ptr1[0] = tilePos | 0x4000;
ptr1[1] = bottomMapDataPtr[0];
ptr1 += 2;
result++;
if (result >= 0x600) {
return result;
}
u32 result;
u32 y, x;

for (result = 0, y = 0; y < height; y += 0x40) {
for (x = 0; x < width; x++) {
u32 tilePos = y + x;
if (mapBottomDataClone[tilePos] != mapBottomData[tilePos]) {
if (mapBottomData[tilePos] < 0x4000) {
ptr1[0] = tilePos | 0x4000;
ptr1[1] = mapBottomData[tilePos];
ptr1 += 2;
result++;
if (result >= 0x600) {
return result;
}
if ((topMapDataClonePtr[0] != topMapDataPtr[0]) && (topMapDataPtr[0] < 0x4000)) {
ptr1[0] = tilePos | 0x8000;
ptr1[1] = topMapDataPtr[0];
ptr1 += 2;
result++;
if (result >= 0x800) {
return result;
}
}
}
if (mapTopDataClone[tilePos] != mapTopData[tilePos]) {
if (mapTopData[tilePos] < 0x4000) {
ptr1[0] = tilePos | 0x8000;
ptr1[1] = mapTopData[tilePos];
ptr1 += 2;
result++;
if (result >= 0x800) {
return result;
}
topMapDataPtr++;
topMapDataClonePtr++;
bottomMapDataPtr++;
bottomMapDataClonePtr++;
indexX++;
}
}
iVar10 += 0x80;
indexY += 0x40;
} while (indexY < height);
}
}
return result;
}
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