Add area documentation to Texture::load_from_image

Author: crumblingstatue

src/graphics/texture.rs

@@ -127,7 +127,12 @@ impl Texture {
     /// Load texture from an image
     ///
     /// # Arguments
-    /// * image - Image to upload to the texture
+    ///
+    /// - `image`: Image to upload to the texture
+    /// - `area`: Can be used to load only a sub-rectangle of the whole image.
+    ///           If you want the entire image then use a default `IntRect`.
+    ///           If the area rectangle crosses the bounds of the image,
+    ///           it is adjusted to fit the image size.
     pub fn load_from_image(&mut self, image: &Image, area: IntRect) -> SfResult<()> {
         unsafe { ffi::sfTexture_loadFromImage(self, image.raw(), area).into_sf_result() }
     }