Added missing documentation to the source code in the Playdate bindings target.

Sources/PlaydateKit/Graphics/Structures/Bitmap.Data.swift

@@ -2,10 +2,17 @@ extension Graphics.Bitmap {
     /// The bitmap's dimensions, row stride, and raw pixel/mask storage.
     /// The pointers are owned by the bitmap.
     public struct Data {
+        /// The bitmap's width, in pixels.
         public let width: Int
+        /// The bitmap's height, in pixels.
         public let height: Int
+        /// The stride of one row of pixel data, in bytes.
         public let rowBytes: Int
+        /// The bitmap's mask data, or `nil` if it has no mask. One bit per
+        /// pixel; rows are `rowBytes` wide.
         public let mask: UnsafeMutablePointer<UInt8>?
+        /// The bitmap's pixel data. One bit per pixel; rows are `rowBytes`
+        /// wide.
         public let data: UnsafeMutablePointer<UInt8>?
     }
 }

Sources/PlaydateKit/Graphics/Structures/Graphics.Rect.swift

@@ -9,6 +9,8 @@ extension Graphics {
         public var top: Int
         public var bottom: Int
 
+        /// Creates a rect from its edges. `right` and `bottom` are not
+        /// inclusive.
         public init(left: Int, right: Int, top: Int, bottom: Int) {
             self.left = left
             self.right = right
@@ -16,6 +18,7 @@ extension Graphics {
             self.bottom = bottom
         }
 
+        /// Creates a rect from an origin and size.
         public init(x: Int, y: Int, width: Int, height: Int) {
             self.init(left: x, right: x + width, top: y, bottom: y + height)
         }
@@ -30,6 +33,7 @@ extension Graphics {
                     top: Int32(top), bottom: Int32(bottom))
         }
 
+        /// Returns the rect offset by (dx, dy).
         public func translated(dx: Int, dy: Int) -> Rect {
             Rect(left: left + dx, right: right + dx, top: top + dy, bottom: bottom + dy)
         }

Sources/PlaydateKit/Graphics/Structures/Pattern.swift

@@ -1,9 +1,12 @@
 extension Graphics {
     /// An 8×8 two-color pattern: 8 rows of image data followed by 8 rows of mask.
     public struct Pattern: Sendable {
+        /// The pattern's 8 rows of image data followed by 8 rows of mask,
+        /// one byte per row.
         public var bytes: (UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8,
                            UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8)
 
+        /// Creates a pattern from 8 rows of image data and 8 rows of mask.
         public init(bytes: (UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8,
                             UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8)) {
             self.bytes = bytes