fix: row of black pixels when total rows after resize is odd

img/img.go

@@ -26,8 +26,22 @@ func Decode(filepath string) (image.Image, error) {
 	return img, nil
 }
 
-// Resize resizes an image to the specified width and height.
+// Resizes an image to the specified width and height.
 // If either width or height is 0, the aspect ratio is maintained.
+// If the output of the resize has an uneven height, a final resize is done to make it even.
+// This prevents a line of black pixels from appearing at the bottom of the image when rendered.
 func Resize(image image.Image, width, height int) image.Image {
-	return resize.Resize(uint(width), uint(height), image, resize.Lanczos3)
+	image = resize.Resize(uint(width), uint(height), image, resize.Lanczos3)
+
+	// check if the height is even and resize again if it is not
+	if image.Bounds().Dy()%2 != 0 {
+		image = resize.Resize(
+			uint(image.Bounds().Dx()),
+			uint(image.Bounds().Dy()+1),
+			image,
+			resize.Lanczos3,
+		)
+	}
+
+	return image
 }