Additional obj-c methods for darwin Foundation

Added support for NSBitmapImageRep class.
Added ability to set contents to a CALayer.
I needed these to support a port of Handmade Hero, but they are of general use.

core/sys/darwin/Foundation/NSBitmapImageRep.odin

@@ -0,0 +1,50 @@
+package objc_Foundation
+
+import "base:intrinsics"
+
+@(objc_class="NSBitmapImageRep")
+BitmapImageRep :: struct { using _: Object }
+
+@(objc_type=BitmapImageRep, objc_name="alloc", objc_is_class_method=true)
+BitmapImageRep_alloc :: proc "c" () -> ^BitmapImageRep {
+        return msgSend(^BitmapImageRep, BitmapImageRep, "alloc")
+}
+
+@(objc_type=BitmapImageRep, objc_name="initWithBitmapDataPlanes")
+BitmapImageRep_initWithBitmapDataPlanes :: proc "c" (
+        self: ^BitmapImageRep, 
+        bitmapDataPlanes: ^^u8,
+        pixelsWide: Integer, 
+        pixelsHigh: Integer,
+        bitsPerSample: Integer,
+        samplesPerPixel: Integer,
+        hasAlpha: bool, 
+        isPlanar: bool,
+        colorSpaceName: ^String,
+        bytesPerRow: Integer,
+        bitsPerPixel: Integer) -> ^BitmapImageRep {
+
+	return msgSend(^BitmapImageRep, 
+                self, 
+                "initWithBitmapDataPlanes:pixelsWide:pixelsHigh:bitsPerSample:samplesPerPixel:hasAlpha:isPlanar:colorSpaceName:bytesPerRow:bitsPerPixel:",
+                bitmapDataPlanes,
+                pixelsWide, 
+                pixelsHigh,
+                bitsPerSample,
+                samplesPerPixel,
+                hasAlpha,
+                isPlanar, 
+                colorSpaceName,
+                bytesPerRow,
+                bitsPerPixel)
+}
+
+@(objc_type=BitmapImageRep, objc_name="bitmapData")
+BitmapImageRep_bitmapData :: proc "c" (self: ^BitmapImageRep) -> rawptr {
+        return msgSend(rawptr, self, "bitmapData") 
+}
+
+@(objc_type=BitmapImageRep, objc_name="CGImage")
+BitmapImageRep_CGImage :: proc "c" (self: ^BitmapImageRep) -> rawptr {
+        return msgSend(rawptr, self, "CGImage") 
+}

core/sys/darwin/Foundation/NSWindow.odin

@@ -568,6 +568,14 @@ window_delegate_register_and_alloc :: proc(template: WindowDelegateTemplate, cla
 @(objc_class="CALayer")
 Layer :: struct { using _: Object }
 
+@(objc_type=Layer, objc_name="contents")
+Layer_contents :: proc "c" (self: ^Layer) -> rawptr {
+	return msgSend(rawptr, self, "contents")
+}
+@(objc_type=Layer, objc_name="setContents")
+Layer_setContents :: proc "c" (self: ^Layer, contents: rawptr) {
+	msgSend(nil, self, "setContents:", contents)
+}
 @(objc_type=Layer, objc_name="contentsScale")
 Layer_contentsScale :: proc "c" (self: ^Layer) -> Float {
 	return msgSend(Float, self, "contentsScale")