Working example

sdl3/sdl3_rect.odin

@@ -0,0 +1,61 @@
+package sdl3
+
+import "core:c"
+
+Point  :: distinct [2]c.int
+FPoint :: distinct [2]f32
+
+Rect :: struct {
+	x, y: c.int,
+	w, h: c.int,
+}
+
+FRect :: struct {
+	x, y: f32,
+	w, h: f32,
+}
+
+RectToFRect :: #force_inline proc "c" (rect: Rect, frect: ^FRect) {
+	frect.x = f32(rect.x)
+	frect.y = f32(rect.y)
+	frect.w = f32(rect.w)
+	frect.h = f32(rect.h)
+}
+
+
+@(require_results)
+PointInRect :: proc "c" (p: Point, r: Rect) -> bool {
+	return ( (p.x >= r.x) && (p.x < (r.x + r.w)) &&
+	        (p.y >= r.y) && (p.y < (r.y + r.h)) )
+}
+
+@(require_results)
+PointInRectFloat :: proc "c" (p: FPoint, r: FRect) -> bool {
+	return ( (p.x >= r.x) && (p.x <= (r.x + r.w)) &&
+	        (p.y >= r.y) && (p.y <= (r.y + r.h)) )
+}
+
+@(require_results)
+RectEmpty :: proc "c" (r: Rect) -> bool {
+	return r.w <= 0 || r.h <= 0
+}
+
+
+@(require_results)
+RectEqual :: proc "c" (a, b: Rect) -> bool {
+	return a == b
+}
+
+@(default_calling_convention="c", link_prefix="SDL_", require_results)
+foreign lib {
+	HasRectIntersection             :: proc(#by_ptr A, B: Rect)                                                   -> bool ---
+	GetRectIntersection             :: proc(#by_ptr A, B: Rect, result: ^Rect)                                    -> bool ---
+	GetRectUnion                    :: proc(#by_ptr A, B: Rect, result: ^Rect)                                    -> bool ---
+	GetRectEnclosingPoints          :: proc(points: [^]Point, count: c.int, #by_ptr clip: Rect, result: ^Rect)    -> bool ---
+	GetRectAndLineIntersection      :: proc(#by_ptr rect: Rect, X1, Y1, X2, Y2: ^c.int)                           -> bool ---
+	HasRectIntersectionFloat        :: proc(#by_ptr A, B: FRect)                                                  -> bool ---
+	GetRectIntersectionFloat        :: proc(#by_ptr A, B: FRect, result: ^FRect)                                  -> bool ---
+	GetRectUnionFloat               :: proc(#by_ptr A, B: FRect, result: ^FRect)                                  -> bool ---
+	GetRectEnclosingPointsFloat     :: proc(points: [^]FPoint, count: c.int, #by_ptr clip: FRect, result: ^FRect) -> bool ---
+	GetRectAndLineIntersectionFloat :: proc(#by_ptr rect: FRect, X1, Y1, X2, Y2: ^f32)                            -> bool ---
+}