Add Rect::origin and update Rect::new to specify the origin location of rectangles.

changelog.md

@@ -2,6 +2,7 @@ In this file will be listed the changes, especially the breaking ones that one s
 when upgrading from a version of rust-sdl2 to another.
 
 ### Next
+[PR #1493](https://github.com/Rust-SDL2/rust-sdl2/pull/1493) Add `Rect::origin` and specifies origin location in `Rect::new`.
 
 [PR #1472](https://github.com/Rust-SDL2/rust-sdl2/pull/1472) Add `Canvas::render_geometry`, `Canvas::render_geometry_raw` and an example that uses them both. Both these bindings use `SDL_RenderGeometryRaw`.
 

src/sdl2/rect.rs

@@ -12,7 +12,7 @@ use std::ptr;
 
 /// The maximal integer value that can be used for rectangles.
 ///
-/// This value is smaller than strictly needed, but is useful in ensuring that
+/// This value is smaller than is strictly needed, but is useful in ensuring that
 /// rect sizes will never have to be truncated when clamping.
 pub fn max_int_value() -> u32 {
     i32::MAX as u32 / 2
@@ -115,7 +115,7 @@ impl Hash for Rect {
 }
 
 impl Rect {
-    /// Creates a new rectangle from the given values.
+    /// Creates a new rectangle from the given values with an origin in the Upper Left.
     ///
     /// The width and height are clamped to ensure that the right and bottom
     /// sides of the rectangle does not exceed i32::MAX (the value
@@ -236,7 +236,17 @@ impl Rect {
     pub fn bottom(&self) -> i32 {
         self.raw.y + self.raw.h
     }
-
+
+    /// Returns the origin of the rectangle (Top Left)
+    ///
+    /// ```
+    /// use sdl2::rect::Rect;
+    /// assert_eq!(Rect::new(5, 5, 10, 10).origin(), (5,5));
+    /// ```
+    pub fn origin(&self) -> (i32, i32) {
+        (self.left(), self.top())
+    }
+
     /// Shifts this rectangle to the left by `offset`.
     ///
     /// # Example