diff options
Diffstat (limited to 'src/image.rs')
| -rw-r--r-- | src/image.rs | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/src/image.rs b/src/image.rs index 66ca858..0ce41d9 100644 --- a/src/image.rs +++ b/src/image.rs @@ -36,11 +36,43 @@ impl Image { self.height } - pub fn rect(&mut self, x: u32, y: u32, width: u32, height: u32) { - todo!() + pub fn rect(&mut self, x: u32, y: u32, width: u32, height: u32, clr: Color) { + let x_start = x as usize; + let x_end = (x + width) as usize; + + for idx in x_start..x_end { + for idy in y as usize..y as usize + height as usize { + let data_idx = idx + idy * self.width as usize; + self.data[data_idx] = clr.into(); + } + } + } + + /// Primitive, naive line drawing funciton. lerps the points together and + /// draws a rect of the specified width at that location. + pub fn line(&mut self, x1: u32, y1: u32, x2: u32, y2: u32, width: u32, clr: Color) { + let start_x = x1.min(x2) as f32; + let start_y = y1.min(y2) as f32; + let end_x = x1.max(x2) as f32; + let end_y = y1.max(y2) as f32; + + tracing::trace!("start_x = {start_x} / end_x = {end_x}"); + tracing::trace!("start_y = {start_y} / end_y = {end_y}"); + + let dx = end_x - start_x; + let dy = end_y - start_y; + let long = dx.max(dy); + + for idx in 0..long as usize { + let x = start_x + dx * (idx as f32 / long); + let y = start_y + dy * (idx as f32 / long); + + self.rect(x as u32, y as u32, width, width, clr); + } } } +#[derive(Copy, Clone, Debug)] pub struct Color { pub r: u8, pub g: u8, |