nullndvoid
d53661b9a0
I will start working on stack traces tonight and tomorrow. We need to be able to 'unwind' by finding calling functions.
62 lines
1.7 KiB
Rust
62 lines
1.7 KiB
Rust
use super::{
|
|
application::{frame::Frame, render::RenderError},
|
|
maths::geometry::Vec2,
|
|
};
|
|
use crate::arch::x86_64::drivers::framebuffer::colour::Colour;
|
|
use crate::resources::font::Font;
|
|
|
|
pub struct Writer<'a> {
|
|
font: &'a Font,
|
|
}
|
|
|
|
impl<'a> Writer<'a> {
|
|
pub const fn new(font: &'a Font) -> Self {
|
|
Self { font }
|
|
}
|
|
|
|
pub const fn set_font(&mut self, font: &'a Font) {
|
|
self.font = font;
|
|
}
|
|
|
|
pub const fn font_size(&self) -> Vec2<usize> {
|
|
Vec2::new(self.font.width(), self.font.height())
|
|
}
|
|
|
|
pub fn render_glyph(
|
|
&self,
|
|
frame: &mut Frame,
|
|
pos: Vec2<usize>,
|
|
c: u8,
|
|
scale: usize,
|
|
) -> Result<(), RenderError> {
|
|
// get a reference to the character glyph from the font.
|
|
let data: &[u8] = self.font.glyph_for(c as u16);
|
|
|
|
if pos.x() + self.font.width() * scale > frame.dimensions().x()
|
|
|| pos.y() + self.font.height() * scale > frame.dimensions().y()
|
|
{
|
|
return Err(RenderError::Generic);
|
|
}
|
|
|
|
for (row, line) in data.iter().enumerate().take(self.font.height()) {
|
|
for col in 0..self.font.width() {
|
|
let pixel_x: usize = pos.x() + col * scale;
|
|
let pixel_y: usize = pos.y() + row * scale;
|
|
|
|
if line & (0x80 >> col) != 0 {
|
|
for i in 0..scale {
|
|
for j in 0..scale {
|
|
frame.write_pixel(
|
|
pixel_x + i,
|
|
pixel_y + j,
|
|
Colour::White,
|
|
)?;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
}
|