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11 lines
3.3 KiB
Markdown
11 lines
3.3 KiB
Markdown
# libSceSystemGesture technical debt
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### Silent stubs
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- [System gesture recognizers](../../../core/libs/prx/libSceSystemGesture/Export.cpp) (libSceSystemGesture) - `sceSystemGestureGetTouchEvents`, `GetTouchEventsCount`, `GetTouchEventByIndex`, `GetTouchEventByEventID` and the recognizer append, remove, reset and update calls report that no recognizer ever matches, so a title receives primitive touch events but no tap, drag, hold, pinch, rotation or flick event. Handle and pointer arguments are still checked across all query entry points. Error codes follow the 0x80D1 values main already uses in this file; KytyPS5 uses 0x8089 (INVALID_ARGUMENT 0x80890001, INVALID_HANDLE 0x80890006), and which one the console returns is not verified. `sceSystemGestureGetTouchRecognizerInformation` returns the gesture type and rectangle given to `sceSystemGestureCreateTouchRecognizer` or `UpdateTouchRecognizerRectangle`, stored in the title's recognizer buffer in a layout private to this file, and always reports `updated_time` 0 because no recognizer is ever updated with input. It throws for a recognizer that was not created by `sceSystemGestureCreateTouchRecognizer` or has no rectangle, since the console's result in those cases is not known
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### Unknown function info
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- [Primitive touch events](../../../core/libs/prx/libSceSystemGesture/Export.cpp) (libSceSystemGesture) - `sceSystemGestureUpdatePrimitiveTouchRecognizer` reads the pad reports the title passes in, `{int32 padHandle, int32 reportNumber, const ScePadData* padDataBuffer, 8 reserved bytes}`, as [fpPS4](https://github.com/red-prig/fpPS4/blob/585d06fa7c04698c41272b95a696a14c4180e13e/src/ps4_libscesystemgesture.pas) records `SceSystemGestureTouchPadData`; `padHandle` is not checked and a report of a pad other than the one the title opened is not told apart. The touch states 0 inactive, 1 begin, 2 active and 3 end are the Vita ones in [RPCS3](https://github.com/RPCS3/rpcs3/blob/38c444cfa1dbe152daa63b1703c12172078cd056/rpcs3/Emu/PSP2/Modules/sceSystemGesture.h), whose recognizer, rectangle and primitive event layouts are the ones main already uses, and no public source states the PS5 values. A primitive keeps the touch id the pad reports, its positions are the pad's touchpad coordinates unscaled, `delta_time` and `elapsed_time` come from the reports' own `timestamp`, and `is_updated` is 1 for a primitive whose state or position changed in the update; the console's units, scaling and `is_updated` rule are unverified. An ended touch stays readable as one `end` event until the next report sampled drops it. A null `pInputData`, a null `padDataBuffer` or a `reportNumber` of 0 or less leaves the events unchanged and returns success, an event buffer shorter than the event count reports as many events as it holds, and `sceSystemGestureGetPrimitiveTouchEventByPrimitiveID` throws for an id that no tracked touch has; what the console answers in those cases is not known
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- [sceSystemGestureDebugGetVersion](../../../core/libs/prx/libSceSystemGesture/Export.cpp) (libSceSystemGesture) - its name and NID are in the [PS5 3.20 export inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceSystemGesture.c), but no credible prototype was found. It is declared without parameters solely to resolve known imports; this is not an ABI claim
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