Add stretch to resize options

client/src/cli.rs

@@ -212,6 +212,8 @@ pub enum ResizeStrategy {
     Crop,
     /// Resize the image to fit inside the screen, preserving the original aspect ratio
     Fit,
+    /// Resize the image to fit inside the screen, without preserving the original aspect ratio
+    Stretch,
 }
 
 #[derive(Parser)]

client/src/imgproc.rs

@@ -205,6 +205,7 @@ pub fn compress_frames(
         ResizeStrategy::No => img_pad(&first_img, dim, color)?,
         ResizeStrategy::Crop => img_resize_crop(&first_img, dim, filter)?,
         ResizeStrategy::Fit => img_resize_fit(&first_img, dim, filter, color)?,
+        ResizeStrategy::Stretch => img_resize_stretch(&first_img, dim, filter)?,
     };
 
     let mut canvas: Option<Box<[u8]>> = None;
@@ -217,6 +218,7 @@ pub fn compress_frames(
             ResizeStrategy::No => img_pad(&img, dim, color)?,
             ResizeStrategy::Crop => img_resize_crop(&img, dim, filter)?,
             ResizeStrategy::Fit => img_resize_fit(&img, dim, filter, color)?,
+            ResizeStrategy::Stretch => img_resize_stretch(&img, dim, filter)?,
         };
 
         if let Some(canvas) = canvas.as_ref() {
@@ -382,6 +384,45 @@ pub fn img_resize_fit(
     }
 }
 
+pub fn img_resize_stretch(
+    img: &Image,
+    dimensions: (u32, u32),
+    filter: FilterType,
+) -> Result<Box<[u8]>, String> {
+    let (width, height) = dimensions;
+    let resized_img = if (img.width, img.height) != (width, height) {
+        let pixel_type = if img.format.channels() == 3 {
+            PixelType::U8x3
+        } else {
+            PixelType::U8x4
+        };
+
+        let src = match fast_image_resize::images::ImageRef::new(
+            img.width,
+            img.height,
+            img.bytes.as_ref(),
+            pixel_type,
+        ) {
+            Ok(i) => i,
+            Err(e) => return Err(e.to_string()),
+        };
+
+        let mut dst = fast_image_resize::images::Image::new(width, height, pixel_type);
+        let mut resizer = Resizer::new();
+        let options = ResizeOptions::new().resize_alg(ResizeAlg::Convolution(filter));
+
+        if let Err(e) = resizer.resize(&src, &mut dst, Some(&options)) {
+            return Err(e.to_string());
+        }
+
+        dst.into_vec().into_boxed_slice()
+    } else {
+        img.bytes.clone()
+    };
+
+    Ok(resized_img)
+}
+
 pub fn img_resize_crop(
     img: &Image,
     dimensions: (u32, u32),

client/src/main.rs

@@ -184,6 +184,9 @@ fn make_img_request(
                     ResizeStrategy::Fit => {
                         img_resize_fit(&img_raw, dim, make_filter(&img.filter), &img.fill_color)?
                     }
+                    ResizeStrategy::Stretch => {
+                        img_resize_stretch(&img_raw, dim, make_filter(&img.filter))?
+                    }
                 };
 
                 img_req_builder.push(

doc/swww-img.1.scd

@@ -40,9 +40,10 @@ swww-img
 	Whether to resize the image and the method by which to resize it.
 
 	Possible values:
-		- _no_:   Do not resize the image
-		- _crop_: Resize the image to fill the whole screen, cropping out parts that don't fit
-		- _fit_:  Resize the image to fit inside the screen, preserving the original aspect ratio
+		- _no_:       Do not resize the image
+		- _crop_:     Resize the image to fill the whole screen, cropping out parts that don't fit
+		- _fit_:      Resize the image to fit inside the screen, preserving the original aspect ratio
+		- _stretch_:  Resize the image to fit inside the screen, without preserving the original aspect ratio
 
 	Default is _crop_.