add experimental filter/convolution module

Author: jay3332

CHANGELOG.md

@@ -43,6 +43,9 @@ Versions prior to v0.7 are not tagged/released on GitHub.
 - Add `TextLayout::with_capacity`
 - Add `TextLayout::at(x, y)` as a shortcut to `TextLayout::new().with_position(x, y)`
 - Add `{Linear, Radial, Conic}Gradient::with_colors` and `{Linear, Radial, Conic}Gradient::with_colors_and_positions`
+- Implement `FromIterator<P>` and `FromIterator<(P, f64)>` for `LinearGradient`, `RadialGradient`, and `ConicGradient`
+  - This allows you to create a gradient from an iterator of colors or an iterator of `(color, position)` pairs
+- Add `Image::from_fill`
 
 ## v0.10.3 (2024-09-23)
 - Fix GIF encoding issues as produced in [#38](https://github.com/jay3332/ril/issues/38)

Cargo.toml

@@ -43,6 +43,9 @@ image = "^0"
 imageproc = "^0.23"
 rusttype = "^0.9"
 
+[profile.test]
+inherits = "release"
+
 [[bench]]
 path = "benches/invert.rs"
 name = "invert"

src/encode.rs

@@ -446,14 +446,12 @@ impl<C: Default, P: Pixel> DerefMut for EncoderMetadataWithConfig<C, P> {
 /// ```no_run
 /// use std::fs::File;
 /// use std::time::Duration;
+/// use ril::colors::{RED, BLUE};
 /// use ril::encodings::png::PngEncoder;
 /// use ril::prelude::*;
 ///
 /// const HALF_SECOND: Duration = Duration::from_millis(500);
 ///
-/// const RED: Rgb = Rgb::new(255, 0, 0);
-/// const BLUE: Rgb = Rgb::new(0, 0, 255);
-///
 /// fn main() -> ril::Result<()> {
 ///     let mut writer = File::create("output.png")?;
 ///     // Prepare metadata. The PNG encoder requires we anticipate the frame count prior to encoding:

src/fill.rs

@@ -1,5 +1,5 @@
 //! Includes the [`Fill`] and [`IntoFill`] traits and primitive fill types such as [`SolidFill`].
-//! 
+//!
 //! You should almost never need use a fill type directly since methods that take fills usually
 //! allow anything that implements [`IntoFill`], which includes things such as [`Pixel`]s for solid
 //! fills, [`gradient`][crate::gradient] types, and even [`Image`]s for image fills.
@@ -79,7 +79,7 @@ impl<P: Pixel> SolidFill<P> {
         Self(color)
     }
 
-    /// Returns a the color (represented as a [`Pixel`]) of the fill.
+    /// Returns the color (represented as a [`Pixel`]) of the fill.
     #[must_use]
     pub const fn color(&self) -> P {
         self.0