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use super::{Buffer, Rect, Drawable, Pixel, Pixels, Coord, Style}; pub struct Canvas<'a, S: Style> { buffer: &'a mut Buffer<S>, pub frame: Rect, } impl<'a, S: Style> Canvas<'a, S> { pub fn new(buffer: &'a mut Buffer<S>, frame: Rect) -> Self { Self { buffer, frame, } } } impl<'a, S: Style> Drawable<S> for Canvas<'a, S> { fn fill(&mut self, text: char, style: S) { self.buffer.rect(self.frame, text, style); } fn rect(&mut self, rect: Rect, text: char, style: S) { let text: String = (0..rect.width).map(|_| text).collect(); for y in 0..rect.height { self.buffer.string(self.frame.x + rect.x, self.frame.y + rect.y + y, text.clone(), style); } } fn string(&mut self, x: u16, y: u16, text: String, style: S) { let mut current_x = x; let mut current_y = y; for c in text.chars() { self.pixel( current_x, current_y, Pixel { text: Some(c), style, }, ); current_x += 1; if current_x >= self.frame.width { current_x = 0; current_y += 1; } } } fn pixels(&mut self, x: u16, y: u16, pixels: &Pixels<S>) { let mut current_x = x; let mut current_y = y; for p in pixels.iter(){ self.pixel( current_x, current_y, *p ); current_x += 1; if current_x >= self.frame.width { current_x = 0; current_y += 1; } } } fn pixel(&mut self, x: u16, y: u16, pixel: Pixel<S>) { self.buffer.pixel(self.frame.x + x, self.frame.y + y, pixel); } fn pixel_at_index(&mut self, index: usize, pixel: Pixel<S>) { let index = Coord::from_index(index, self.frame.width).as_index(self.buffer.width); self.buffer.pixel_at_index(index, pixel); } }