4f7630b750
Trying to read a third paint order off the running game turned up two bugs in the capture harness, both of which fail in ways that look like the game misbehaving rather than the script being wrong. 1. `--audio` is not a cvar in this tree, and eight boot scripts passed it. Xenia calls ShowSimpleMessageBox from ParseLaunchArguments, BEFORE logging is initialised, so the symptom is a 10x10 window, no log, no guest memory and a dialog that blocks on XIfEvent forever - i.e. a hang deep in the emulator. run-canary`s own header documents this exact trap; the scripts predate it. Removed from all eight. 2. `vgamepad` no longer exists - the uinput pad was replaced by the --hid=file driver and pad.py - but skip_intro.sh still called it. The script runs without `set -e`, so the call failed silently and the title branch pressed nothing while still exiting 0. A caller was told "TITLE -> A" with the game sitting on the title screen. It now presses through pad.py and exits 6 if that fails. The first bug is fixed and verified: the boot now reaches the title screen with PRESS (A) BUTTON. The second is fixed but does NOT unblock the title - see the next commit.
106 lines
3.7 KiB
Python
Executable File
106 lines
3.7 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Dump the PAINT ORDER of every live UI screen object, off a running Canary.
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A screen object (vtable `0x820b30b4`) holds its elements at `+0x08` as
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`{ptr, count, capacity}` over 48-byte records in **declaration** order, and a
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second list at `+0x30` — pointers to the same records, in the order the screen
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is **painted**. `docs/re/structures/ui-screen-runtime.md` establishes both.
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This walks every resident screen object and prints, per object, the permutation
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and each element's pivot, which is what identifies the build in the file (a
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declaration entry's pivot is exactly half the decoded sprite).
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screen_children.py [/dev/shm/xenia_memory_XXX]
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Point `$GMEM_FILE` at a snapshot to work offline:
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cp --sparse=always /dev/shm/xenia_memory_* /tmp/snap.bin
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"""
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import os
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import struct
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import sys
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sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
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import gmem
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VTABLE = 0x820B30B4
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ELEMENTS_AT = 0x08 # {ptr, count, capacity} -> 48-byte element records
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CHILDREN_AT = 0x30 # {ptr, count, capacity} -> pointers into those records
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RECORD = 48
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def main():
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path = gmem.mem_path()
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size = os.path.getsize(path)
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with open(path, "rb") as f:
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def rd(va, n):
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f.seek(gmem.va_to_off(va))
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return f.read(n)
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def u32(va):
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return struct.unpack(">I", rd(va, 4))[0]
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def f32(va):
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return struct.unpack(">f", rd(va, 4))[0]
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# every object whose word 0 is the screen vtable
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objs = []
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pat = struct.pack(">I", VTABLE)
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CHUNK = 1 << 24
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for start, end in gmem.extents(f.fileno(), size):
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pos = start
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while pos < end:
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f.seek(pos)
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buf = f.read(min(CHUNK, end - pos))
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if not buf:
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break
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i = buf.find(pat)
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while i != -1:
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va = gmem.primary_va(pos + i)
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if va is not None:
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objs.append(va)
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i = buf.find(pat, i + 1)
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pos += len(buf)
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print(f"{len(objs)} object(s) with vtable {VTABLE:#010x}")
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for obj in objs:
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try:
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eptr, ecount = u32(obj + ELEMENTS_AT), u32(obj + ELEMENTS_AT + 4)
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cptr, ccount = u32(obj + CHILDREN_AT), u32(obj + CHILDREN_AT + 4)
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except ValueError:
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continue
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if not (0 < ecount <= 4096) or eptr == 0:
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continue
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# element record pointer -> declaration index
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index_of, pivots = {}, []
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ok = True
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for i in range(ecount):
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rec = eptr + i * RECORD
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try:
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index_of[u32(rec)] = i
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pivots.append((f32(rec + 0x10), f32(rec + 0x14)))
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except ValueError:
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ok = False
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break
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if not ok:
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continue
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print(f"\n== object {obj:#010x}: {ecount} elements, {ccount} children")
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print(" pivots: " + " ".join(f"{i}:({x:g},{y:g})" for i, (x, y) in enumerate(pivots)))
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if not (0 < ccount <= 4096) or cptr == 0:
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print(" (no child array)")
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continue
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order, unknown = [], 0
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for i in range(ccount):
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p = u32(cptr + i * 4)
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if p in index_of:
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order.append(index_of[p])
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else:
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order.append(None)
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unknown += 1
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print(f" paint order: {order}")
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if unknown:
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print(f" ({unknown} child pointer(s) did not match an element record)")
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if __name__ == "__main__":
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main()
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