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add Image::text for packed

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bendn 2023-12-08 09:46:56 +07:00
parent d86a78b235
commit 405da83bac
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GPG key ID: 0D9D3A2A3B2A93D6
2 changed files with 43 additions and 31 deletions
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72
src/drawing/text.rs
View file

@ -7,16 +7,13 @@ use crate::{
use fontdue::{layout::TextStyle, Font};
use umath::{generic_float::Constructors, FF32};
impl Image<&mut [u32], 1> {
pub(crate) fn text_u32(
&mut self,
x: u32,
y: u32,
size: f32,
font: &Font,
text: &str,
color: [u8; 4],
) {
/// note: `N` may != channels
pub trait Text<const N: usize> {
fn text(&mut self, x: u32, y: u32, size: f32, font: &Font, text: &str, color: [u8; N]);
}
impl<T: AsMut<[u32]> + AsRef<[u32]>> Text<4> for Image<T, 1> {
fn text(&mut self, x: u32, y: u32, size: f32, font: &Font, text: &str, color: [u8; 4]) {
let mut lay =
fontdue::layout::Layout::new(fontdue::layout::CoordinateSystem::PositiveYDown);
lay.append(&[font], &TextStyle::new(text, size, 0));
@ -36,10 +33,9 @@ impl Image<&mut [u32], 1> {
// SAFETY: the rasterizer kinda promises that metrics width and height are in bounds
let fill = unsafe { float(*bitmap.get_unchecked(j * metrics.width + i)) };
// SAFETY: we clampin
let bg: [u8; 4] =
unsafe { Pack::unpack(*self.buffer.get_unchecked(self.at(x, y))) };
let bg: [u8; 4] = unsafe { Pack::unpack(self.pixel(x, y)[0]) };
// SAFETY: see above
*unsafe { self.buffer.get_unchecked_mut(self.at(x, y)) } =
*(&mut unsafe { self.pixel_mut(x, y) }[0]) =
// SAFETY: fill is 0..=1
Pack::pack(unsafe { &bg.wam(color, FF32::one() - fill, fill) });
}
@ -48,23 +44,8 @@ impl Image<&mut [u32], 1> {
}
}
impl<const N: usize, T: AsMut<[u8]> + AsRef<[u8]>> Image<T, N> {
/// Draw text.
///
/// ```
/// # use fimg::Image;
/// let font = fontdue::Font::from_bytes(
/// &include_bytes!("../../data/CascadiaCode.ttf")[..],
/// fontdue::FontSettings {
/// scale: 200.0,
/// ..Default::default()
/// },
/// ).unwrap();
/// let mut i: Image<_, 4> = Image::alloc(750, 250).boxed();
/// i.text(50, 10, 200.0, &font, "hello", [0, 0, 0, 255]);
/// # assert_eq!(&**i.buffer(), include_bytes!("../../tdata/text.imgbuf"));
/// ```
pub fn text(&mut self, x: u32, y: u32, size: f32, font: &Font, text: &str, color: [u8; N]) {
impl<const N: usize, T: AsMut<[u8]> + AsRef<[u8]>> Text<N> for Image<T, N> {
fn text(&mut self, x: u32, y: u32, size: f32, font: &Font, text: &str, color: [u8; N]) {
let mut lay =
fontdue::layout::Layout::new(fontdue::layout::CoordinateSystem::PositiveYDown);
lay.append(&[font], &TextStyle::new(text, size, 0));
@ -92,3 +73,34 @@ impl<const N: usize, T: AsMut<[u8]> + AsRef<[u8]>> Image<T, N> {
}
}
}
impl<const N: usize, T> Image<T, N> {
/// Draw text.
///
/// ```
/// # use fimg::Image;
/// let font = fontdue::Font::from_bytes(
/// &include_bytes!("../../data/CascadiaCode.ttf")[..],
/// fontdue::FontSettings {
/// scale: 200.0,
/// ..Default::default()
/// },
/// ).unwrap();
/// let mut i: Image<_, 4> = Image::alloc(750, 250).boxed();
/// i.text(50, 10, 200.0, &font, "hello", [0, 0, 0, 255]);
/// # assert_eq!(&**i.buffer(), include_bytes!("../../tdata/text.imgbuf"));
/// ```
pub fn text<const P: usize>(
&mut self,
x: u32,
y: u32,
size: f32,
font: &Font,
text: &str,
color: [u8; P],
) where
Image<T, N>: Text<P>,
{
Text::text(self, x, y, size, font, text, color)
}
}

2
src/show.rs
View file

@ -34,7 +34,7 @@ mod real {
.map(|(x, y)| (x.min(i.width()), y.min(i.height())))
{
// SAFETY: ctor
unsafe { Image::new(buf.width, buf.height, &mut *buf.buffer) }.text_u32(
unsafe { Image::new(buf.width, buf.height, &mut *buf.buffer) }.text(
5,
i.height() - 20,
12.0,