"""Where does the production build store 0x1a texels? Watch DRAM writes during
one texture's header+bulk upload -> the storage base per handle."""
import sys, os, struct, collections
HERE=os.path.dirname(os.path.abspath(__file__))
sys.path.insert(0,HERE); sys.path.insert(0,os.path.dirname(HERE))
sys.path.insert(0,r'C:\VWE\TeslaRel410\dpl3-revive\patha')
import emu860, emu_main, emu860c
from driver import boot, CpuShim
from vrboard import A
ANAME={int(a):a.name for a in A}
emu860.Mem.log=lambda self,*a,**k:None
data=open(r'C:/VWE/TeslaRel410/emulator/render-bridge/captures/netdeath-20260708.fifodump','rb').read()
recs=[]; off=0
while True:
    i=data.find(b'VPXM',off)
    if i<0: break
    ln=struct.unpack_from('<I',data,i+4)[0]; body=data[i+8:i+8+ln]; off=i+8+ln
    if len(body)>=4:
        a=struct.unpack_from('<I',body,0)[0]
        if a<0x100: recs.append((a,body[4:]))
# first 0x1a header (cmd 55, handle 0xc)
tex_start=None
for i,(a,p) in enumerate(recs):
    if a==0x1a and len(p)==32:
        tex_start=i; hdr=[struct.unpack_from('<I',p,4*k)[0] for k in range(8)]; break
print("texture upload @cmd %d handle=%#x u=%d v=%d"%(tex_start,hdr[0],hdr[2],hdr[3]))
r=boot(fw='vrend410', queue=recs); shim=CpuShim()
while r.qi < tex_start:
    reason,_=emu860c.run(500_000_000)
    if reason==3: continue
    pc=emu860c.getstate()['pc']; h=r.hooks.get(pc)
    if h is None: break
    if h: h(shim)
emu860c.watch_add(0x08000000,0x0c000000); emu860c.watch_drain()
# run through the whole texture (header + 64 rows)
stop=tex_start+66
while r.qi < stop:
    reason,_=emu860c.run(200_000_000)
    if reason==3: continue
    pc=emu860c.getstate()['pc']; h=r.hooks.get(pc)
    if h is None: break
    if h: h(shim)
raw=emu860c.watch_drain()
vals=struct.unpack('<%dI'%(len(raw)//4),raw)
addrs=vals[0::2]; wvals=vals[1::2]
pages=collections.Counter(a>>12 for a in addrs)
print("write pages during upload:")
for pg,n in pages.most_common(8):
    lo=min(a for a in addrs if a>>12==pg); hi=max(a for a in addrs if a>>12==pg)
    print("  %#x000 : %d writes  span %#x..%#x"%(pg,n,lo,hi))
# find contiguous run matching texel pattern (0x00BBGGRR grayscale)
top=pages.most_common(1)[0][0]
run=[(addrs[k],wvals[k]) for k in range(len(addrs)) if addrs[k]>>12==top][:6]
print("sample @page %#x000:"%top)
for a,v in run: print("   %#010x <- %08x"%(a,v))