151 lines
4.6 KiB
Rust
151 lines
4.6 KiB
Rust
#![cfg(feature = "image")]
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use crate::render::{Canvas, Pixel};
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use crate::types::Color;
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use image::{ImageBuffer, Luma, LumaA, Pixel as ImagePixel, Primitive, Rgb, Rgba};
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macro_rules! impl_pixel_for_image_pixel {
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($p:ident<$s:ident>: $c:pat => $d:expr) => {
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impl<$s: Primitive + 'static> Pixel for $p<$s> {
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type Image = ImageBuffer<Self, Vec<S>>;
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type Canvas = (Self, Self::Image);
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fn default_color(color: Color) -> Self {
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match color.select($s::zero(), $s::max_value()) {
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$c => $p($d),
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}
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}
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}
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};
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}
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impl_pixel_for_image_pixel! { Luma<S>: p => [p] }
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impl_pixel_for_image_pixel! { LumaA<S>: p => [p, S::max_value()] }
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impl_pixel_for_image_pixel! { Rgb<S>: p => [p, p, p] }
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impl_pixel_for_image_pixel! { Rgba<S>: p => [p, p, p, S::max_value()] }
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impl<P: ImagePixel + 'static> Canvas for (P, ImageBuffer<P, Vec<P::Subpixel>>) {
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type Pixel = P;
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type Image = ImageBuffer<P, Vec<P::Subpixel>>;
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fn new(width: u32, height: u32, dark_pixel: P, light_pixel: P) -> Self {
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(dark_pixel, ImageBuffer::from_pixel(width, height, light_pixel))
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}
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fn draw_dark_pixel(&mut self, x: u32, y: u32) {
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self.1.put_pixel(x, y, self.0);
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}
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fn into_image(self) -> ImageBuffer<P, Vec<P::Subpixel>> {
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self.1
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}
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}
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#[cfg(test)]
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mod render_tests {
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use crate::render::Renderer;
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use crate::types::Color;
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use image::{Luma, Rgba};
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#[test]
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fn test_render_luma8_unsized() {
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let image = Renderer::<Luma<u8>>::new(
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&[
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Color::Light,
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Color::Dark,
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Color::Dark,
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//
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Color::Dark,
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Color::Light,
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Color::Light,
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//
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Color::Light,
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Color::Dark,
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Color::Light,
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],
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3,
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1,
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)
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.module_dimensions(1, 1)
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.build();
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#[rustfmt::skip]
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let expected = [
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255, 255, 255, 255, 255,
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255, 255, 0, 0, 255,
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255, 0, 255, 255, 255,
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255, 255, 0, 255, 255,
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255, 255, 255, 255, 255,
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];
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assert_eq!(image.into_raw(), expected);
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}
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#[test]
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fn test_render_rgba_unsized() {
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let image = Renderer::<Rgba<u8>>::new(&[Color::Light, Color::Dark, Color::Dark, Color::Dark], 2, 1)
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.module_dimensions(1, 1)
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.build();
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#[rustfmt::skip]
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let expected: &[u8] = &[
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255,255,255,255, 255,255,255,255, 255,255,255,255, 255,255,255,255,
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255,255,255,255, 255,255,255,255, 0, 0, 0,255, 255,255,255,255,
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255,255,255,255, 0, 0, 0,255, 0, 0, 0,255, 255,255,255,255,
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255,255,255,255, 255,255,255,255, 255,255,255,255, 255,255,255,255,
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];
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assert_eq!(image.into_raw(), expected);
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}
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#[test]
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fn test_render_resized_min() {
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let image = Renderer::<Luma<u8>>::new(&[Color::Dark, Color::Light, Color::Light, Color::Dark], 2, 1)
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.min_dimensions(10, 10)
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.build();
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#[rustfmt::skip]
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let expected: &[u8] = &[
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255,255,255, 255,255,255, 255,255,255, 255,255,255,
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255,255,255, 255,255,255, 255,255,255, 255,255,255,
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255,255,255, 255,255,255, 255,255,255, 255,255,255,
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255,255,255, 0, 0, 0, 255,255,255, 255,255,255,
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255,255,255, 0, 0, 0, 255,255,255, 255,255,255,
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255,255,255, 0, 0, 0, 255,255,255, 255,255,255,
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255,255,255, 255,255,255, 0, 0, 0, 255,255,255,
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255,255,255, 255,255,255, 0, 0, 0, 255,255,255,
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255,255,255, 255,255,255, 0, 0, 0, 255,255,255,
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255,255,255, 255,255,255, 255,255,255, 255,255,255,
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255,255,255, 255,255,255, 255,255,255, 255,255,255,
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255,255,255, 255,255,255, 255,255,255, 255,255,255,
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];
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assert_eq!(image.dimensions(), (12, 12));
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assert_eq!(image.into_raw(), expected);
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}
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#[test]
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fn test_render_resized_max() {
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let image = Renderer::<Luma<u8>>::new(&[Color::Dark, Color::Light, Color::Light, Color::Dark], 2, 1)
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.max_dimensions(10, 5)
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.build();
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#[rustfmt::skip]
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let expected: &[u8] = &[
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255,255, 255,255, 255,255, 255,255,
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255,255, 0, 0, 255,255, 255,255,
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255,255, 255,255, 0, 0, 255,255,
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255,255, 255,255, 255,255, 255,255,
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];
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assert_eq!(image.dimensions(), (8, 4));
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assert_eq!(image.into_raw(), expected);
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}
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}
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