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