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jb: option to draw debug graphics to show touch interactions (#797)

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## Link to GitHub Issue or related Pull Request, if one exists
related to #697 

## Description of change
Add a new option that paints touch targets and touch points for jubeat;
gets enabled if there is a touch screen connected. This is to help
explain / debug issues when users have their touch screen issues, which
is usually due to misalignment.

Fix the touch targets being off by 1 pixel (center gap is 1px wider in
both directions).

Also, simplify the `improved` algorithm to simulate a finger and trigger
nearest-neighbor for the AC dimensions. In terms of touch performance
this is near identical to what we had before, but it allows us to draw a
nice debug overlay instead of just grids.

## Testing
Tested portrait and landscape versions of jb.
This commit is contained in:
bicarus
2026-07-13 00:31:05 -07:00
committed by GitHub
parent d7c144646f
commit c255e3a1db
10 changed files with 616 additions and 307 deletions
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src/spice2x/launcher/launcher.cpp
+14
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@@ -1314,10 +1314,24 @@ int main_implementation(int argc, char *argv[]) {
games::jb::TOUCH_ALGORITHM = games::jb::JubeatTouchAlgorithm::AcAccurate;
} else if (options[launcher::Options::JubeatTouchAlgo].value_text() == "legacy") {
games::jb::TOUCH_ALGORITHM = games::jb::JubeatTouchAlgorithm::Legacy;
} else if (options[launcher::Options::JubeatTouchAlgo].value_text() == "plus") {
games::jb::TOUCH_ALGORITHM = games::jb::JubeatTouchAlgorithm::Plus;
} else {
games::jb::TOUCH_ALGORITHM = games::jb::JubeatTouchAlgorithm::Improved;
}
}
if (options[launcher::Options::JubeatTouchDebug].is_active()) {
auto mode = options[launcher::Options::JubeatTouchDebug].value_text();
if (mode == "none") {
games::jb::TOUCH_DEBUG_OVERLAY = games::jb::JubeatTouchDebugMode::JbTouchDebugNone;
} else if (mode == "box") {
games::jb::TOUCH_DEBUG_OVERLAY = games::jb::JubeatTouchDebugMode::JbTouchDebugBox;
} else if (mode == "all") {
games::jb::TOUCH_DEBUG_OVERLAY = games::jb::JubeatTouchDebugMode::JbTouchDebugAll;
} else {
games::jb::TOUCH_DEBUG_OVERLAY = games::jb::JubeatTouchDebugMode::JbTouchDebugAuto;
}
}
// reflec beat touch emulation
if (options[launcher::Options::spice2x_RBTouchScale].is_active()) {