From 8c51bd1aefa3153bdc54d2d6be182d62f4afef3d Mon Sep 17 00:00:00 2001
From: Eemeli Lehtonen <eemeli.o.lehtonen@utu.fi>
Date: Mon, 9 Jan 2023 21:51:27 +0200
Subject: [PATCH] unifont downloader
---
build.rs | 35 +++++++++++++++++++-
src/arch/x86_64/limine/framebuffer.rs | 6 ++--
src/arch/x86_64/limine/term.rs | 2 +-
src/main.rs | 3 ++
src/qemu.rs | 10 +++---
src/video/font.rs | 46 ++++++++++++++++++++++++---
src/video/framebuffer.rs | 27 +++++++++++++---
7 files changed, 111 insertions(+), 18 deletions(-)
diff --git a/build.rs b/build.rs
index b53fae9..14da3e8 100644
--- a/build.rs
+++ b/build.rs
@@ -1,4 +1,12 @@
-use std::{env::var, error::Error};
+use std::{
+ env::var,
+ error::Error,
+ fs::{self, File, OpenOptions},
+ io::Read,
+ io::Write,
+ path::PathBuf,
+ process::Command,
+};
//
@@ -35,5 +43,30 @@ fn main() -> Result<(), Box<dyn Error>> {
panic!();
};
+ let unifont_path = "target/hyperion/unifont.bmp";
+ let read_unifont = || {
+ let mut file = OpenOptions::new()
+ .read(true)
+ .create(false)
+ .write(false)
+ .open(unifont_path)?;
+
+ let mut buf = Vec::new();
+ file.read_to_end(buf)?;
+ Ok::<_, Box<dyn Error>>(buf)
+ };
+
+ let unifont = if let Ok(file) = read_unifont() {
+ file
+ } else {
+ Command::new("wget")
+ .arg("http://unifoundry.com/pub/unifont/unifont-15.0.01/unifont-15.0.01.bmp")
+ .args(["-O", unifont_path])
+ .spawn()
+ .unwrap();
+
+ read_unifont().unwrap()
+ };
+
Ok(())
}
diff --git a/src/arch/x86_64/limine/framebuffer.rs b/src/arch/x86_64/limine/framebuffer.rs
index 70df236..8b53040 100644
--- a/src/arch/x86_64/limine/framebuffer.rs
+++ b/src/arch/x86_64/limine/framebuffer.rs
@@ -2,9 +2,9 @@ use crate::{
println,
video::framebuffer::{Framebuffer, FBO},
};
-use core::{ops::Deref, slice};
-use limine::{LimineFramebuffer, LimineFramebufferRequest, LimineFramebufferResponse};
-use spin::{Lazy, Mutex, MutexGuard};
+use core::slice;
+use limine::LimineFramebufferRequest;
+use spin::Mutex;
//
diff --git a/src/arch/x86_64/limine/term.rs b/src/arch/x86_64/limine/term.rs
index 97446b7..7840026 100644
--- a/src/arch/x86_64/limine/term.rs
+++ b/src/arch/x86_64/limine/term.rs
@@ -19,7 +19,7 @@ unsafe impl Send for Writer {}
impl Write for Writer {
fn write_str(&mut self, s: &str) -> fmt::Result {
- let mut write = self.0.write().ok_or(fmt::Error)?;
+ let write = self.0.write().ok_or(fmt::Error)?;
for term in self.0.terminals() {
write(term, s);
diff --git a/src/main.rs b/src/main.rs
index 4d81da6..420484f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -53,6 +53,8 @@ fn kernel_main() -> ! {
fbo.fill(40, 40, 40, 40, Color::RED);
fbo.fill(50, 50, 60, 40, Color::GREEN);
fbo.fill(5, 15, 80, 20, Color::BLUE);
+
+ fbo.put_bytes(100, 100, b"ABABABAB\0", Color::WHITE, Color::BLACK);
}
#[cfg(test)]
@@ -61,6 +63,7 @@ fn kernel_main() -> ! {
arch::done();
}
+#[allow(unused)]
fn stack_overflow(n: usize) {
if n == 0 {
return;
diff --git a/src/qemu.rs b/src/qemu.rs
index cb30c3a..f65d38d 100644
--- a/src/qemu.rs
+++ b/src/qemu.rs
@@ -1,7 +1,4 @@
-use core::{
- fmt::{Arguments, Write},
- sync::atomic::AtomicUsize,
-};
+use core::fmt::{Arguments, Write};
use spin::{Lazy, Mutex};
use uart_16550::SerialPort;
@@ -16,6 +13,9 @@ pub fn _print(args: Arguments) {
}
/// Unlocks the COM1 writer IF it is locked by this exact thread
+///
+/// SAFETY: this is unsafe unless called from the same thread, this is intended for double fault
+/// handling
pub unsafe fn unlock() {
// TODO: SMP
// if COM1_LOCKER.load(Ordering::SeqCst) != crate::THREAD {
@@ -27,7 +27,7 @@ pub unsafe fn unlock() {
//
-static COM1_LOCKER: AtomicUsize = AtomicUsize::new(0);
+// static COM1_LOCKER: AtomicUsize = AtomicUsize::new(0);
static COM1: Lazy<Mutex<SerialPort>> = Lazy::new(|| {
let mut port = unsafe { SerialPort::new(0x3f8) };
port.init();
diff --git a/src/video/font.rs b/src/video/font.rs
index 9d16b72..25a6137 100644
--- a/src/video/font.rs
+++ b/src/video/font.rs
@@ -3,14 +3,13 @@
// bitmap: [u8; 16],
// }
+#[allow(clippy::unusual_byte_groupings)]
pub static FONT: [[u8; 16]; 256] = {
- let mut font = [[0u8; 16]; 256];
-
- font[b'a' as usize] = [
+ let default = [
0b_11111111,
0b_11111111,
0b_11000011,
- 0b_11000011,
+ 0b_11000011, //
0b_11000011,
0b_11000011,
0b_11000011,
@@ -25,5 +24,44 @@ pub static FONT: [[u8; 16]; 256] = {
0b_11111111,
];
+ let mut font = [default; 256];
+
+ font[b'A' as usize] = [
+ 0b_00000000,
+ 0b_00000000,
+ 0b_00000000, //
+ 0b_01111110,
+ 0b_11111111,
+ 0b_11100111,
+ 0b_11000011,
+ 0b_11111111,
+ 0b_11111111,
+ 0b_11000011,
+ 0b_11000011,
+ 0b_11000011,
+ 0b_11000011,
+ 0b_00000000, //
+ 0b_00000000,
+ 0b_00000000,
+ ];
+ font[b'B' as usize] = [
+ 0b_00000000,
+ 0b_00000000,
+ 0b_00000000, //
+ 0b_11111110,
+ 0b_11111111,
+ 0b_11000111,
+ 0b_11000111,
+ 0b_11111110,
+ 0b_11111110,
+ 0b_11000111,
+ 0b_11000111,
+ 0b_11111111,
+ 0b_11111110,
+ 0b_00000000, //
+ 0b_00000000,
+ 0b_00000000,
+ ];
+
font
};
diff --git a/src/video/framebuffer.rs b/src/video/framebuffer.rs
index 1f96c5c..e26a9cb 100644
--- a/src/video/framebuffer.rs
+++ b/src/video/framebuffer.rs
@@ -1,7 +1,5 @@
-use core::{
- fmt,
- ops::{Deref, DerefMut},
-};
+use super::font::FONT;
+use core::fmt;
use spin::{Mutex, Once};
//
@@ -40,10 +38,31 @@ impl Framebuffer {
}
}
}
+
+ pub fn put_byte(&mut self, x: usize, y: usize, ch: u8, fg: Color, bg: Color) {
+ let map = FONT[ch as usize];
+
+ for (yd, row) in map.into_iter().enumerate() {
+ for xd in 0..8 {
+ self.set(
+ x + xd,
+ y + yd,
+ if (row & 1 << (7 - xd)) != 0 { fg } else { bg },
+ );
+ }
+ }
+ }
+
+ pub fn put_bytes(&mut self, x: usize, y: usize, s: &[u8], fg: Color, bg: Color) {
+ for (offs, ch) in s.iter().enumerate() {
+ self.put_byte(x + 12 * offs, y, *ch, fg, bg)
+ }
+ }
}
impl Color {
pub const WHITE: Color = Color::new(0xff, 0xff, 0xff);
+ pub const BLACK: Color = Color::new(0x00, 0x00, 0x00);
pub const RED: Color = Color::new(0xff, 0x00, 0x00);
pub const GREEN: Color = Color::new(0x00, 0xff, 0x00);
--
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