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Create a 5x8 bitmap font

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This commit is contained in:
Savanni D'Gerinel 2025-03-08 01:23:06 -05:00
parent 9175b9d4cc
commit 596de6525f
3 changed files with 196 additions and 2 deletions
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180
pico-st7789/src/font/bits_5_8.rs Normal file
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@ -0,0 +1,180 @@
use alloc::collections::btree_map::BTreeMap;
use crate::canvas::{Canvas, RGB};
use super::{Font, Glyph};
pub struct BitmapGlyph([u8; 8]);
pub struct BitmapFont(BTreeMap<char, BitmapGlyph>);
impl BitmapFont {
pub fn new() -> Self {
let mut font = BTreeMap::new();
font.insert(' ', BitmapGlyph([
0b10101,
0b01010,
0b10101,
0b01010,
0b10101,
0b01010,
0b10101,
0b01010,
]));
font.insert(
'/',
BitmapGlyph([
0b00001,
0b00010,
0b00010,
0b00100,
0b00100,
0b01000,
0b01000,
0b10000,
]),
);
font.insert(
'0',
BitmapGlyph([
0b01110,
0b10001,
0b10001,
0b10101,
0b10101,
0b10001,
0b10001,
0b01110,
]),
);
font.insert(
'1',
BitmapGlyph([
0b00001, 0b00011, 0b00101, 0b00001, 0b00001, 0b00001, 0b00001, 0b00001,
]),
);
font.insert(
'2',
BitmapGlyph([
0b01110, 0b10001, 0b00001, 0b00001, 0b00010, 0b00100, 0b01000, 0b11111,
]),
);
font.insert(
'3',
BitmapGlyph([
0b01110, 0b10001, 0b00001, 0b01110, 0b00001, 0b00001, 0b10001, 0b01110,
]),
);
font.insert(
'4',
BitmapGlyph([
0b10001,
0b10001,
0b10001,
0b11111,
0b00001,
0b00001,
0b00001,
0b00001,
]),
);
font.insert(
'5',
BitmapGlyph([
0b11111,
0b10000,
0b10000,
0b11111,
0b00001,
0b00001,
0b10001,
0b01110,
]),
);
font.insert(
'6',
BitmapGlyph([
0b01110,
0b10001,
0b10000,
0b10000,
0b11110,
0b10001,
0b10001,
0b01110,
]),
);
font.insert(
'7',
BitmapGlyph([
0b11111,
0b00001,
0b00001,
0b00010,
0b00110,
0b00100,
0b01000,
0b01000,
]),
);
font.insert(
'8',
BitmapGlyph([
0b01110,
0b10001,
0b10001,
0b01110,
0b01110,
0b10001,
0b10001,
0b01110,
]),
);
font.insert(
'9',
BitmapGlyph([
0b01110,
0b10001,
0b10001,
0b10001,
0b01111,
0b00001,
0b00001,
0b01110,
]),
);
Self(font)
}
}
impl Font<BitmapGlyph> for BitmapFont {
fn glyph(&self, c: char) -> &BitmapGlyph {
self.0.get(&c).unwrap_or(self.0.get(&' ').unwrap())
}
}
impl Glyph for BitmapGlyph {
fn draw(&self, canvas: &mut impl Canvas, x: usize, y: usize, color: &RGB) {
for row in 0..8 {
if self.0[row] & (1 << 4) > 0 {
canvas.set_pixel(x, y + row, color);
}
if self.0[row] & (1 << 3) > 0 {
canvas.set_pixel(x + 1, y + row, color);
}
if self.0[row] & (1 << 2) > 0 {
canvas.set_pixel(x + 2, y + row, color);
}
if self.0[row] & (1 << 1) > 0 {
canvas.set_pixel(x + 3, y + row, color);
}
if self.0[row] & 1 > 0 {
canvas.set_pixel(x + 4, y + row, color);
}
}
}
fn extents(&self) -> (usize, usize) {
(5, 8)
}
}

3
pico-st7789/src/font/mod.rs
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@ -1,5 +1,8 @@
use crate::canvas::{Canvas, RGB};
mod bits_5_8;
pub use bits_5_8::BitmapFont;
mod seven_segment;
pub use seven_segment::SevenSegmentFont;

15
pico-st7789/src/main.rs
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@ -17,7 +17,7 @@ mod canvas;
use canvas::{Canvas, RGB, print};
mod font;
use font::{Font, Glyph, SevenSegmentFont, SixteenSegmentFont};
use font::{BitmapFont, Font, Glyph, SevenSegmentFont, SixteenSegmentFont};
mod st7789;
use st7789::{ST7789Display, SETUP_PROGRAM};
@ -59,12 +59,13 @@ impl Canvas for FrameBuf {
unsafe fn main() -> ! {
{
use core::mem::MaybeUninit;
const HEAP_SIZE: usize = 1024;
const HEAP_SIZE: usize = 64 * 1024;
static mut HEAP_MEM: [MaybeUninit<u8>; HEAP_SIZE] = [MaybeUninit::uninit(); HEAP_SIZE];
unsafe { HEAP.init(HEAP_MEM.as_ptr() as usize, HEAP_SIZE) }
}
let font_sixteen = SixteenSegmentFont::new();
let font_bitmap = BitmapFont::new();
// rp_pico::pac::Peripherals is a reference to physical hardware defined on the Pico.
let mut peripherals = pac::Peripherals::take().unwrap();
@ -157,6 +158,16 @@ unsafe fn main() -> ! {
print(&mut canvas, &font_sixteen, 1, 81, "`abcdefghijklmno", &RGB{ r: 63, g: 63, b: 63 });
print(&mut canvas, &font_sixteen, 1, 101, "pqrstuvwxyz{|}", &RGB{ r: 63, g: 63, b: 63 });
print(&mut canvas, &font_bitmap, 1, 121, " !\"#$%&'<>*+,-./", &RGB{ r: 63, g: 63, b: 63 });
print(&mut canvas, &font_bitmap, 1, 141, "0123456789| = ?", &RGB{ r: 63, g: 63, b: 63 });
/*
print(&mut canvas, &font_bitmap, 1, 161, "@ABCDEFGHIJKLMNO", &RGB{ r: 63, g: 63, b: 63 });
print(&mut canvas, &font_bitmap, 1, 181, "PQRSTUVWXYZ[\\]^_", &RGB{ r: 63, g: 63, b: 63 });
print(&mut canvas, &font_bitmap, 1, 201, "`abcdefghijklmno", &RGB{ r: 63, g: 63, b: 63 });
print(&mut canvas, &font_bitmap, 1, 221, "pqrstuvwxyz{|}", &RGB{ r: 63, g: 63, b: 63 });
*/
// canvas.square(10, 70, 160, 310, &white);
{