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use crate::colors::{Palette, PaletteColor};
use crate::coords::Coord;
use crate::easel::{Easel, Orientation, Tool};
use image::imageops::ColorMap;
use image::imageops::FilterType;
use image::DynamicImage;
use image::GenericImageView;
use image::Rgba;
use std::error::Error;
pub struct ImageDrawer<'a> {
easel: &'a mut Easel,
palette: Palette,
current_color: PaletteColor,
easel_size: Coord,
current_pos: Coord,
image_size: Coord,
offset: Coord,
}
pub fn size_to_easel(image: &DynamicImage, easel: &Easel) -> DynamicImage {
let (size_x, size_y) = image.dimensions();
let (ul_corner, br_corner) = if size_x > size_y {
easel.easel_coords.landscape_bounds
} else {
easel.easel_coords.portrait_bounds
};
let x_bounds = br_corner.x - ul_corner.x;
let y_bounds = br_corner.y - ul_corner.y;
image.resize(x_bounds as u32, y_bounds as u32, FilterType::Lanczos3)
}
impl<'a> ImageDrawer<'a> {
pub fn new(easel: &'a mut Easel, size_x: u32, size_y: u32) -> ImageDrawer<'a> {
easel.change_brush_size(0);
easel.change_tool(Tool::Paintbrush);
if (size_x > size_y && easel.orientation == Orientation::Portrait)
|| (size_y > size_x && easel.orientation == Orientation::Landscape)
{
easel.change_orientation();
}
let current_color = easel.current_color;
let (ulcorner, lrcorner) = easel.get_bounds();
let easel_x = lrcorner.x - ulcorner.x - 1;
let easel_y = lrcorner.y - ulcorner.y - 1;
let easel_size = Coord::new(easel_x, easel_y);
let size_x = size_x as i32;
let size_y = size_y as i32;
let image_size = Coord::new(size_x, size_y);
let offset_x = (easel_x - size_x + 1) / 2;
let offset_y = (easel_y - size_y) / 2;
let offset = Coord::new(offset_x, offset_y);
let start_x = offset_x;
let start_y = offset_y;
let current_pos = Coord::new(start_x, start_y);
ImageDrawer {
easel,
palette: Palette::new(),
current_color,
easel_size,
image_size,
current_pos,
offset,
}
}
pub fn draw_top_border(&mut self) -> Result<(), Box<dyn Error>> {
for iy in 0..self.offset.y {
self.easel.draw_line(
Coord::new(0, iy),
Coord::new(self.easel_size.x, iy),
&PaletteColor::White,
)?;
}
self.current_color = self.easel.current_color;
Ok(())
}
pub fn handle_pixel(
&mut self,
rgba: &mut Rgba<u8>,
x: u32,
y: u32,
) -> Result<(), Box<dyn Error>> {
let mut in_coord = Coord::new(x as i32, y as i32);
in_coord = in_coord + &self.offset;
let closest_color = self.palette.colormap[self.palette.index_of(rgba)];
if in_coord.y > self.current_pos.y {
self.easel.draw_line(
self.current_pos,
Coord::new(self.image_size.x + self.offset.x, self.current_pos.y),
&self.current_color,
)?;
self.current_pos = in_coord;
self.current_color = closest_color;
}
if closest_color != self.current_color {
self.easel.draw_line(
self.current_pos,
in_coord - &Coord::new(1, 0),
&self.current_color,
)?;
self.current_pos = in_coord;
self.current_color = closest_color;
}
Ok(())
}
pub fn cleanup_image(&mut self) -> Result<(), Box<dyn Error>> {
let left_edge = self.offset.x - 1;
if left_edge > 0 {
self.easel.draw_line(
Coord::new(left_edge, 0),
Coord::new(left_edge, self.image_size.y),
&PaletteColor::White,
)?;
for ix in self.offset.y..self.image_size.y + self.offset.y {
self.easel.draw_line(
Coord::new(0, ix),
Coord::new(left_edge, ix),
&PaletteColor::White,
)?;
}
}
let right_edge = self.image_size.x + self.offset.x + 1;
if right_edge < self.easel_size.x {
self.easel.draw_line(
Coord::new(right_edge, 0),
Coord::new(right_edge, self.image_size.y),
&PaletteColor::White,
)?;
for ix in self.offset.y..self.image_size.y + self.offset.y {
self.easel.draw_line(
Coord::new(right_edge, ix),
Coord::new(self.easel_size.x, ix),
&PaletteColor::White,
)?;
}
}
if self.current_pos.y < self.easel_size.y {
for iy in self.current_pos.y..self.easel_size.y {
self.easel.draw_line(
Coord::new(0, iy),
Coord::new(self.easel_size.x, iy),
&PaletteColor::White,
)?;
}
}
Ok(())
}
}