184 lines
6.1 KiB
Rust
184 lines
6.1 KiB
Rust
/* Character cells are 8x8 */
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pub const CHARSIZE_X: u32 = 8;
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pub const CHARSIZE_Y: u32 = 8;
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pub struct Size2d {
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pub x: u32,
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pub y: u32,
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}
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pub struct Color(pub u32);
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impl Color {
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pub fn rgb(r: u8, g: u8, b: u8) -> Color {
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Color(u32::from(b) << 16 | u32::from(g) << 8 | u32::from(r))
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}
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pub fn black() -> Color {
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Color::rgb(0, 0, 0)
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}
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pub fn white() -> Color {
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Color::rgb(255, 255, 255)
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}
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pub fn red() -> Color {
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Color::rgb(255, 0, 0)
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}
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pub fn green() -> Color {
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Color::rgb(0, 255, 0)
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}
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pub fn blue() -> Color {
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Color::rgb(0, 0, 255)
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}
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}
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#[derive(PartialEq)]
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pub enum PixelOrder {
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BGR,
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RGB,
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}
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pub struct Display {
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base: u32,
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size: u32,
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depth: u32,
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pitch: u32,
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max_x: u32,
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max_y: u32,
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pub width: u32,
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height: u32,
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order: PixelOrder,
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}
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// https://github.com/david-griffith/rust-bitmap/blob/master/src/lib.rs
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#[rustfmt::skip]
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static CHAR_ARRAY: [u64; 95] = [
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0x0000_0000_0000_0000, // space
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0x183c_3c18_1800_1800, 0x3636_0000_0000_0000, 0x3636_7f36_7f36_3600, // ! " #
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0x0c3e_031e_301f_0c00, 0x0063_3318_0c66_6300, 0x1c36_1c6e_3b33_6e00, // $ % &
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0x0606_0300_0000_0000, 0x180c_0606_060c_1800, 0x060c_1818_180c_0600, // ' ( )
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0x0066_3cff_3c66_0000, 0x000c_0c3f_0c0c_0000, 0x0000_0000_000c_0c06, // * + ,
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0x0000_003f_0000_0000, 0x0000_0000_000c_0c00, 0x6030_180c_0603_0100, // - . /
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0x3e63_737b_6f67_3e00, 0x0c0e_0c0c_0c0c_3f00, 0x1e33_301c_0633_3f00, // 0 1 2
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0x1e33_301c_3033_1e00, 0x383c_3633_7f30_7800, 0x3f03_1f30_3033_1e00, // 3 4 5
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0x1c06_031f_3333_1e00, 0x3f33_3018_0c0c_0c00, 0x1e33_331e_3333_1e00, // 6 7 8
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0x1e33_333e_3018_0e00, 0x000c_0c00_000c_0c00, 0x000c_0c00_000c_0c06, // 9 : ;
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0x180c_0603_060c_1800, 0x0000_3f00_003f_0000, 0x060c_1830_180c_0600, // < = >
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0x1e33_3018_0c00_0c00, 0x3e63_7b7b_7b03_1e00, 0x0c1e_3333_3f33_3300, // ? @ A
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0x3f66_663e_6666_3f00, 0x3c66_0303_0366_3c00, 0x1f36_6666_6636_1f00, // B C D
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0x7f46_161e_1646_7f00, 0x7f46_161e_1606_0f00, 0x3c66_0303_7366_7c00, // E F G
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0x3333_333f_3333_3300, 0x1e0c_0c0c_0c0c_1e00, 0x7830_3030_3333_1e00, // H I J
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0x6766_361e_3666_6700, 0x0f06_0606_4666_7f00, 0x6377_7f7f_6b63_6300, // K L M
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0x6367_6f7b_7363_6300, 0x1c36_6363_6336_1c00, 0x3f66_663e_0606_0f00, // N O P
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0x1e33_3333_3b1e_3800, 0x3f66_663e_3666_6700, 0x1e33_070e_3833_1e00, // Q R S
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0x3f2d_0c0c_0c0c_1e00, 0x3333_3333_3333_3f00, 0x3333_3333_331e_0c00, // T U V
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0x6363_636b_7f77_6300, 0x6363_361c_1c36_6300, 0x3333_331e_0c0c_1e00, // W X Y
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0x7f63_3118_4c66_7f00, 0x1e06_0606_0606_1e00, 0x0306_0c18_3060_4000, // Z [ \
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0x1e18_1818_1818_1e00, 0x081c_3663_0000_0000, 0x0000_0000_0000_00ff, // ] ^ _
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0x0c0c_1800_0000_0000, 0x0000_1e30_3e33_6e00, 0x0706_063e_6666_3b00, // ` a b
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0x0000_1e33_0333_1e00, 0x3830_303e_3333_6e00, 0x0000_1e33_3f03_1e00, // c d e
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0x1c36_060f_0606_0f00, 0x0000_6e33_333e_301f, 0x0706_366e_6666_6700, // f g h
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0x0c00_0e0c_0c0c_1e00, 0x3000_3030_3033_331e, 0x0706_6636_1e36_6700, // i j k
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0x0e0c_0c0c_0c0c_1e00, 0x0000_337f_7f6b_6300, 0x0000_1f33_3333_3300, // l m n
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0x0000_1e33_3333_1e00, 0x0000_3b66_663e_060f, 0x0000_6e33_333e_3078, // o p q
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0x0000_3b6e_6606_0f00, 0x0000_3e03_1e30_1f00, 0x080c_3e0c_0c2c_1800, // r s t
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0x0000_3333_3333_6e00, 0x0000_3333_331e_0c00, 0x0000_636b_7f7f_3600, // u v w
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0x0000_6336_1c36_6300, 0x0000_3333_333e_301f, 0x0000_3f19_0c26_3f00, // x y z
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0x380c_0c07_0c0c_3800, 0x1818_1800_1818_1800, 0x070c_0c38_0c0c_0700, // { | }
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0x6e3b_0000_0000_0000, // ~
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];
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impl Display {
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pub fn new(
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base: u32,
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size: u32,
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depth: u32,
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pitch: u32,
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max_x: u32,
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max_y: u32,
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width: u32,
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height: u32,
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order: PixelOrder,
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) -> Self {
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Display {
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base,
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size,
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depth,
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pitch,
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max_x,
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max_y,
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width,
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height,
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order,
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}
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}
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#[inline]
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fn color_component(&self, chan: u16) -> u32 {
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u32::from(if self.order == PixelOrder::BGR {
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2 - chan
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} else {
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chan
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})
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}
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#[inline]
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fn write_pixel_component(&self, x: u32, y: u32, chan: u16, c: u32) {
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unsafe {
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*(self.base as *mut u8).offset(
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(y * self.pitch + x * (self.depth >> 3) + self.color_component(chan)) as isize,
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) = c as u8;
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}
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}
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/// Set a pixel value on display at given coordinates.
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#[inline]
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pub fn putpixel(&mut self, x: u32, y: u32, color: u32) {
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self.write_pixel_component(x, y, 0, color & 0xff);
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self.write_pixel_component(x, y, 1, (color >> 8) & 0xff);
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self.write_pixel_component(x, y, 2, (color >> 16) & 0xff);
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}
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pub fn rect(&mut self, x1: u32, y1: u32, x2: u32, y2: u32, color: Color) {
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for y in y1..y2 {
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for x in x1..x2 {
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self.putpixel(x, y, color.0);
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}
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}
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}
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pub fn clear(&mut self, color: Color) {
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self.rect(0, 0, self.width, self.height, color)
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}
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pub fn draw_text(&mut self, x: u32, y: u32, text: &str, color: Color) {
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for i in 0..8 {
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// Take an 8 bit slice from each array value.
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for (char_off, my_char) in text.as_bytes().iter().enumerate() {
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let off = (char_off * 8) as u32;
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if (*my_char as isize - 0x20 > 95) || (*my_char as isize - 0x20 < 0) {
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return; // Err("Character not in font.");
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}
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let mut myval = CHAR_ARRAY[*my_char as usize - 0x20];
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myval = myval.swap_bytes();
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// do initial shr.
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myval >>= i * 8;
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for mycount in 0..8 {
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if myval & 1 == 1 {
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self.putpixel(x + off + mycount, y + i, color.0);
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}
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myval >>= 1;
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if myval == 0 {
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break;
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}
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}
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}
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}
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}
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}
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