Two hot-path optimizations for the device's Cortex-M7 (and debug simulator
builds):
- The ten sub-API pointers are cached once in Playdate.initialize(with:);
wrapper accessors now return UnsafePointer and call sites read a single
field through it, instead of unwrapping the optional API struct and
copying a whole sub-API struct of function pointers on every call.
Nested sub-APIs (sound classes, effects, video, tilemap, http/tcp)
derive from the cached pointers with one field load.
- String -> C conversions (withPlaydateCString, and a new withPlaydateUTF8
used by the text drawing/measuring APIs) use withUnsafeTemporaryAllocation
instead of building a ContiguousArray, so logging and drawText in the
update loop no longer heap-allocate per call. Verified within the
Embedded Swift subset by the device cross-compile.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Wraps all ten subsystems of the Playdate SDK 3.1.1 C API (system, display,
graphics, sprites, sound, file, JSON, Lua, scoreboards, network) in
idiomatic Swift: namespaced APIs, wrapper types with ownership semantics,
closures for callbacks, and typed throws. Written within the Embedded Swift
subset so the same code can target the device.
The SDK headers are resolved through a "playdate" pkg-config module
(Scripts/install-pkgconfig.sh), so the package works as a normal SwiftPM
dependency without unsafe build flags.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
javier
