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Add per-backend input debug visualization + round-trip view

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Makes it possible to isolate an input->tool problem from a tool->game one in the
Controllers panel (under Debug details):
- which backend fed each slot is already shown via the per-pad source tag
  ("XInput #0" / "Steam Input") in the Incoming section;
- a new "Round-trip" table shows, per slot, the state we forwarded (the active
  backend's pad) next to what the game actually read back, highlighting matches.

For the round-trip, the XInput hook now echoes the state it returns to the game into
the status (protocol v9->v10: per-slot read_state in HookStatus).

Verified: hook_selftest (x64 + x86) asserts the hook records the game-read state;
full build x64 + x86 clean; ctest x64 9/9, x86 3/3.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
BlackMark
2026-06-21 05:15:07 +02:00
parent 056a478e19
commit 327ba1f394
8 changed files with 57 additions and 10 deletions
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31
host/src/controllers_panel.cpp
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@@ -182,6 +182,37 @@ void ControllersPanel::draw(const InputSource& input, const HookStatusView& stat
ImGui::EndTable();
}
// Round-trip view: what we forwarded (the active backend's pad, tagged per slot in
// the Incoming section above) vs what the game actually read back through the hook.
// A mismatch isolates a tool->game forwarding problem from an input->tool one.
if (debug_details)
{
ImGui::SeparatorText("Round-trip (forwarded vs game read)");
if (ImGui::BeginTable("roundtrip", 3, ImGuiTableFlags_Borders | ImGuiTableFlags_SizingStretchProp))
{
ImGui::TableSetupColumn("Slot");
ImGui::TableSetupColumn("Forwarded btn / LX,LY");
ImGui::TableSetupColumn("Game read btn / LX,LY");
ImGui::TableHeadersRow();
const auto& fwd = input.pads();
for (int i = 0; i < static_cast<int>(kMaxPads); ++i)
{
const CoopPadState& f = fwd[i].state;
const CoopPadState& r = status.read_state[i];
ImGui::TableNextRow();
ImGui::TableNextColumn();
ImGui::Text("%d", i);
ImGui::TableNextColumn();
ImGui::Text("0x%04X %d,%d", f.buttons, f.thumb_lx, f.thumb_ly);
ImGui::TableNextColumn();
const bool match = f.buttons == r.buttons && f.thumb_lx == r.thumb_lx && f.thumb_ly == r.thumb_ly;
ImGui::TextColored(match ? kGreen : kGrey, "0x%04X %d,%d", r.buttons, r.thumb_lx, r.thumb_ly);
}
ImGui::EndTable();
}
ImGui::TextDisabled("Slot tags in 'Incoming' above show which backend (XInput / Steam) fed each slot.");
}
ImGui::End();
}