49 lines
1.5 KiB
Rust
49 lines
1.5 KiB
Rust
use fpga_lib_macros::include_font_plate;
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pub const VGA_ADDRESS: *mut Color = 0x80000000 as *mut Color;
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pub const WIDTH: usize = 320;
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pub const HEIGHT: usize = 240;
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#[repr(transparent)]
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pub struct Color(pub(crate) u8);
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impl Color {
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pub const fn from_rgb(r: u8, g: u8, b: u8) -> Self {
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Self(((r >> 6) << 6) | ((g >> 5) << 3) | (b >> 5))
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}
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}
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pub const WHITE: Color = Color::from_rgb(255, 255, 255);
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pub const GRAY: Color = Color::from_rgb(128, 128, 128);
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pub const LIGHT_GRAY: Color = Color::from_rgb(128, 64, 64);
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pub const BLACK: Color = Color::from_rgb(0, 0, 0);
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pub const RED: Color = Color::from_rgb(255, 0, 0);
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pub const GREEN: Color = Color::from_rgb(0, 255, 0);
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pub const BLUE: Color = Color::from_rgb(0, 0, 255);
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pub struct VGA {}
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impl VGA {
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/// # Safety
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/// `x` must be less than `WIDTH` and `y` must be less than `HEIGHT`
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pub unsafe fn write_pixel_unsafe(x: u16, y: u16, color: Color) {
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unsafe { *VGA_ADDRESS.add(x as usize + y as usize * WIDTH) = color }
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}
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pub unsafe fn draw_char(x: u16, y: u16, c: char) {
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let c = c as u8 - b' ';
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for i in 0..FONT_HEIGHT {
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for j in 0..FONT_WIDTH {
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}
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}
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}
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}
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pub const FONT_WIDTH: usize = 6;
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pub const FONT_HEIGHT: usize = 13;
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pub const FONTPLATE_WIDTH: usize = 32 * FONT_WIDTH;
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pub const FONTPLATE_HEIGHT: usize = 3 * FONT_HEIGHT;
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pub const FONTPLATE_SIZE: usize = FONTPLATE_WIDTH * FONTPLATE_HEIGHT / 8;
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pub const FONTPLATE: [u8; FONTPLATE_SIZE] = include_font_plate! {"fontplate.png"};
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