• Fix text alignment rendering duplicately (#28)
• Fix TextLayouts with varying fonts not registering properly (#29)
• Fix paletted images panicking when attempting to encode as GIFs

v0.10.1 (2023-10-14)

• Fix encoding image sequences not respecting delay and disposal method
• Fix tests/doctests

v0.10 (2023-10-12)

Major encoder/decoder interface changes

v0.10 introduces a major overhaul to the Encoder/Decoder interfaces.

• Added support for lazy encoding of image sequences.
  • The Encoder trait has been overhauled
    • New associated type <_ as Encoder>::Config for configuring specific encoders
    • Encoding logic between static images and image sequences are now unified: main encoding logic will occur in
      Encoder::add_frame
    • Shortcut associated methods Encoder::encode_static and Encoder::encode_sequence have been added
    • Encoders now take metadata, which can be an &Image, &Frame, or EncoderMetadata
      • You can derive an EncoderMetadata from an Image or Frame with the From/Into trait
        (i.e. EncoderMetadata::from(&image))
    • See below to see how you can lazily encode a stream of frames into a GIF
• Removed DynamicFrameIterator
  • Replaced with Box<dyn FrameIterator<_>>
  • The new SingleFrameIterator struct allows for iterating over a single static image
• ImageFormat struct is now moved into a private standalone format module.
  • This is breaking if you were importing ril::image::ImageFormat (use ril::ImageFormat instead)

Example: Lazily encoding a GIF

use std::fs::File;
use std::time::Duration;
use ril::encodings::gif::GifEncoder; // import the encoder for your desired format
use ril::prelude::*;

fn main() -> ril::Result<()> {
    let mut dest = File::create("output.gif")?;
    // Create a new 256x256 RGB image with a black background
    let black_image = Image::new(256, 256, Rgb::black());
    // Create a new 256x256 RGB image with a white background
    let white_image = Image::new(256, 256, Rgb::white());
    // Prepare the encoder, using one of our images as metadata
    // note: the image ONLY serves as metadata (e.g. dimensions, bit depth, etc.),
    //       it is not encoded into the GIF itself when calling `Encoder::new`
    // note: you will see what `into_handle` does later 
    let mut encoder = GifEncoder::new(&mut dest, &image)?;
  
    // Lazily encode 10 frames into the GIF
    for i in 0..10 {
        // Create a new frame with a delay of 1 second
        let frame = if i % 2 == 0 { black_image.clone() } else { white_image.clone() };
        let frame = Frame::from_image(frame).with_delay(Duration::from_secs(1));
        // Add the frame to the encoder
        encoder.add_frame(&frame)?;
    }
    
    // Finish the encoding process
    encoder.finish()
}

Other breaking changes

• Image generic type P does not have a default anymore
  • In other words: struct Image<P: Pixel = Dynamic> is now struct Image<P: Pixel>
  • This means when you create a new image, you will need to specify the pixel type:
    • Image::<Rgb>::new(256, 256, Rgb::black())
    • Image::<Dynamic>::open("image.png")?
  • You can add a type alias type DynamicImage = Image<Dynamic>; if you want to keep the old behavior
• LinearGradientInterpolation renamed to GradientInterpolation
• LinearGradientBlendMode renamed to GradientBlendMode
• Removes Pixel::inverted in favor of std::ops::Not
  • Instead of pixel.inverted(), you can now do !pixel
    • image.inverted() is removed and replaced with !image
  • This is not the same as the old Pixel::inverted as it will also invert alpha
  • Adds various implementations for Image<Rgba>:
    • Image::<Rgba>::split_rgb_and_alpha splits the image into (Image<Rgb>, Image<L>)
    • Image::<Rgba>::from_rgb_and_alpha creates an RGBA image from (Image<Rgb>, Image<L>)
    • Image::<Rgba>::map_rgb_pixels maps only the R@claGB pixels of the image
      • Allows for image.map_rgb_pixels(|p| !p) for the previous behavior
    • Image::<Rgba>::map_alpha_pixels maps only the alpha pixels of the image
• Fill/IntoFill structs are now moved into a standalone fill module.
• Differentiate text anchor and text alignment
  • TextLayout::{centered, with_horizontal_anchor, with_vertical_anchor} will now change the text anchor but
    not the alignment the text
  • Adds TextAlign enum for text alignment (left, center, right)
  • Adds TextLayout::with_align to specify text alignment
  • This is a breaking change behavior-wise
    • For example, if you have .centered() in your code, you will need to change it to
      .with_align(TextAlign::Center).centered() to produce the same results.
• Error::IOError renamed to Error::IoError

Other changes

• Implement std::error::Error for Error
• Add radial gradients via RadialGradient
  • This adds GradientPosition and RadialGradientCover enums
• Add conic gradients via ConicGradient
• Add Rectangle::at method, which creates a rectangle at specified coordinates.
• Add Rectangle::square to create a rectangle with equal side lengths
• Document Fill/IntoFill structs
• Add ImageFill fill struct for image-clipped fills.
  • IntoFill is implemented for &Image.
• Add ResizeAlgorithm::Tile which repeats copies of the image to fill the target dimensions

Performance improvements

• Not (invert/negation) for Rgb is much more efficient in release mode

Bug fixes

• Fix Line panicking with reversed vertices
  • This error was most commonly encountered with rendering Polygon with borders or antialiasing
• Fix compile-time errors when enabling jpeg feature without enabling the gif feature
• Fix memory leaks when encoding/decoding WebP images

Deprecated methods

• Rectangle::new deprecated in favor of Rectangle::at. Additionally, identical behavior can be found with
  <Rectangle as Default>::default.

v0.9 (2022-12-13)

Breaking changes

• Pixel::force_into_rgb[a] method is now replaced with Pixel::as_rgb[a], which also takes self by reference instead
  of by value.
• All provided Draw objects (but not the Draw trait itself) are now generic over F: IntoFill instead of P: Pixel
  • The trait IntoFill is explained below
  • There should be no change in usage because for any P: Pixel, P is implemented for IntoFill
  • If you are extracting the fill color from a Draw object, you will need to access the .color() method on
    the SolidColor struct. It is a const fn.
  • The Draw trait is still generic over P: Pixel, no changes there

Other changes

• ColorType::is_dynamic is now a const fn
• Add ColorType::has_alpha for whether the color type has an alpha channel
• Add new Fill trait, used to represent a fill color (or gradient, see below) for a Draw object. This replaces the
  simple Pixel trait previously used for this purpose.
  • Add new IntoFill trait, which provides a way to convert anything to a Fill object
    • Associated type <_ as IntoFill>::Pixel is the pixel type of the fill.
    • Associated type <_ as IntoFill>::Fill is the actual fill type.
    • IntoFill is implemented for all P: Pixel and turns into draw::SolidColor<P>
    • IntoFill is implemented for LinearGradient (see below) and turns into gradient::LinearGradientFill<P>
• Add support for gradients
  • Enabled with the gradient feature, which is enabled by default
  • New LinearGradient struct, which represents a linear gradient
    • LinearGradientBlendMode and LinearGradientInterpolation enums are re-exports from the colorgrad crate,
      which is used to configure the gradient's blending mode and interpolation.
• Add Polygon::regular method, which creates a regular polygon with the given amount of sides, center, and radius
  • This uses the Polygon::regular_rotated method, which is the same method, but you are able to specify the rotation
    of the polygon in radians.

Linear gradient example

use ril::prelude::*;

fn main() -> ril::Result<()> {
    // Create a new 256x256 RGB image with a black background
    let mut image = Image::new(256, 256, Rgb::black());
    // Create the `LinearGradient` object
    let gradient = LinearGradient::new()
        // The gradient will be rotated 45 degrees
        .with_angle_degrees(45.0)
        // The first stop is at 0.0, and is red
        .with_color(Rgb::new(255, 0, 0))
        // The second stop is at 0.5, and is white
        .with_color(Rgb::new(255, 255, 255))
        // We can also specify color stop positions manually:
        // .with_color_at(0.5, Rgb::new(255, 255, 255)) 
        // ...  
        // The third stop is at 1.0, and is green
        .with_color(Rgb::new(0, 255, 0));
    
    // Fill a hexagon with the gradient and draw it to the image
    image.draw(&Polygon::regular(6, image.center(), 64).with_fill(gradient));
    // Save the image to a PNG file
    image.save_inferred("gradient_output.png")
}

Output

Full Changelog: v0.8...v0.9

v0.8 (2022-11-30)

Breaking changes

• Paste draw struct now stores images and masks by reference instead of by value. This is to prevent
  unnecessary cloning of large images and/or masks.
  • Paste now has two generic lifetime arguments: Paste<'img, 'mask, _>.
  • This also means that Image::paste, Image::paste_with_mask, and Image::with methods now take images and masks
    by reference instead of by value too.

Other changes

• Add support for drawing lines and polygons using Line and Polygon draw entities
  • Drawing a line or polygon with rounded vertices and a non-centered border position results in undesired output as
    of now.
• Add new static feature. When enabled, this will statically link any native dependencies
• Add non-zero width/height assertions to image constructors

Bug fixes

• Fix GIF decoding bug for images with a global palette
• Fix conversion using Pixel::from_arbitrary_palette with dynamic pixels

Full Changelog: v0.7...v0.8

v0.7 (2022-11-22)

Breaking changes

• ImageSequence::first_frame now returns Option<&Frame> instead of &Frame.
  • Also introduces new first_frame_mut and first_frame[_mut]_unchecked methods.

Other changes

• Add crate-level support for image quantization
  • The new quantize feature enables the color_quant dependency for more complex quantization algorithms
    This is enabled by default, mainly because color_quant appears to not pull any additional dependencies
  • Quantizer struct can handle direct quantization of raw pixel data
  • Image::quantize is a higher-level method that can quantize an image into a paletted image
  • Implement From<Image<Rgb[a]>> for Image<PalettedRgb[a]> which utlizes quantization
• Fix decoding bug for JPEG images with L pixels