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#include "JSystem/JSystem.h" // IWYU pragma: keep
#include "JSystem/J3DGraphBase/J3DShapeDraw.h"
#include "JSystem/JKernel/JKRHeap.h"
#include <cstring>
#include <stdint.h>
#include <dolphin/gx.h>
u32 J3DShapeDraw::countVertex(u32 stride) {
u32 count = 0;
u8* dlStart = (u8*)getDisplayList();
for (u8* dl = dlStart; (dl - dlStart) < getDisplayListSize();) {
u8 cmd = *(u8*)dl;
dl++;
if (cmd != GX_TRIANGLEFAN && cmd != GX_TRIANGLESTRIP)
break;
int vtxNum = *((u16*)(dl));
dl += 2;
count += vtxNum;
dl = (u8*)dl + stride * vtxNum;
}
return count;
}
void J3DShapeDraw::addTexMtxIndexInDL(u32 stride, u32 attrOffs, u32 valueBase) {
u32 byteNum = countVertex(stride);
u32 oldSize = mDisplayListSize;
u32 newSize = ALIGN_NEXT(oldSize + byteNum, 0x20);
u8* newDLStart = new (0x20) u8[newSize];
u8* oldDLStart = (u8*)mDisplayList;
u8* oldDL = oldDLStart;
u8* newDL = newDLStart;
for (; (oldDL - oldDLStart) < mDisplayListSize;) {
// Copy command
u8 cmd = *(u8*)oldDL;
oldDL++;
*newDL++ = cmd;
if (cmd != GX_TRIANGLEFAN && cmd != GX_TRIANGLESTRIP)
break;
// Copy count
int vtxNum = *(u16*)oldDL;
oldDL += 2;
*(u16*)newDL = vtxNum;
newDL += 2;
for (int i = 0; i < vtxNum; i++) {
u8* oldDLVtx = &oldDL[stride * i];
u8 pnmtxidx = *oldDLVtx;
memcpy(newDL, oldDLVtx, (int)attrOffs);
newDL += attrOffs;
*newDL++ = valueBase + pnmtxidx;
memcpy(newDL, oldDLVtx + attrOffs, stride - attrOffs);
newDL += (stride - attrOffs);
}
oldDL = (u8*)oldDL + stride * vtxNum;
}
u32 realSize = ALIGN_NEXT((uintptr_t)newDL - (uintptr_t)newDLStart, 0x20);
for (; (newDL - newDLStart) < newSize; newDL++)
*newDL = 0;
mDisplayListSize = realSize;
mDisplayList = newDLStart;
DCStoreRange(newDLStart, mDisplayListSize);
}
J3DShapeDraw::J3DShapeDraw(const u8* displayList, u32 displayListSize) {
mDisplayList = (void*)displayList;
mDisplayListSize = displayListSize;
}
void J3DShapeDraw::draw() const {
GXCallDisplayList(mDisplayList, mDisplayListSize);
}
J3DShapeDraw::~J3DShapeDraw() {}
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