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+version = "0.1.0"

+edition = "2024"

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+fimg = "0.4.45"

+implicit-fn = "0.1.0"

+swash = "0.2.5"

+#[derive(Clone, Copy, Debug, Default)]

+pub struct Style {

+ pub bg: [u8; 3],

+ pub color: [u8; 3],

+ // one of [Style::BOLD]..

+ pub flags: u8,

+}

+use std::default::Default::default;

+use std::fmt::Debug;

+impl Style {

+ pub const BOLD: u8 = 1;

+ pub const DIM: u8 = 1 << 1;

+ pub const ITALIC: u8 = 1 << 2;

+ pub const UNDERLINE: u8 = 1 << 3;

+ pub const STRIKETHROUGH: u8 = 1 << 4;

+}

+#[derive(Clone, Copy, Default)]

+pub struct Cell {

+ pub style: Style,

+ pub letter: Option<char>,

+}

+impl Debug for Cell {

+ fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {

+ write!(f, "{}", self.letter.unwrap_or(' '))

+ }

+}

+impl Cell {

+ pub fn basic(c: char) -> Self {

+ Self {

+ letter: Some(c),

+ ..default()

+ }

+ }

+}

+#![allow(incomplete_features)]

+#![feature(

+ super_let,

+ debug_closure_helpers,

+ const_trait_impl,

+ anonymous_lifetime_in_impl_trait,

+ deref_patterns,

+ generic_const_exprs,

+ guard_patterns,

+ impl_trait_in_bindings,

+ if_let_guard,

+ import_trait_associated_functions

+)]

+use std::iter::zip;

+mod cell;

+use atools::Join;

+use swash::FontRef;

+use swash::scale::{Render, ScaleContext, Source};

+use swash::shape::ShapeContext;

+use swash::shape::cluster::Glyph;

+use swash::text::cluster::{CharCluster, Parser, Token};

+use swash::text::{Codepoint, Script};

+use swash::zeno::Format;

+

+pub struct Fonts<'a, 'b, 'c, 'd> {

+ regular: FontRef<'a>,

+ bold: FontRef<'b>,

+ italic: FontRef<'c>,

+ bold_italic: FontRef<'d>,

+}

+impl<'a, 'b, 'c, 'd> Fonts<'a, 'b, 'c, 'd> {

+ pub fn new(

+ regular: impl Into<FontRef<'a>>,

+ bold: impl Into<FontRef<'b>>,

+ italic: impl Into<FontRef<'c>>,

+ bold_italic: impl Into<FontRef<'d>>,

+ ) -> Self {

+ Self {

+ regular: regular.into(),

+ bold: bold.into(),

+ italic: italic.into(),

+ bold_italic: bold_italic.into(),

+ }

+ }

+}

+#[implicit_fn::implicit_fn]

+pub unsafe fn render(

+ cells: &[Cell],

+ (w, h): (usize, usize),

+ ppem: f32,

+ bgcolor: [u8; 3],

+ fonts: Fonts,

+) -> Image<Box<[u8]>, 3> {

+ let m = fonts.regular.metrics(&[]);

+ let sz = ppem * (m.max_width / m.units_per_em as f32);

+ let mut i = Image::build(w as _, h as _).fill(bgcolor);

+ if w < 60 || h < 60 {

+ return i;

+ }

+

+ for (col, k) in cells.chunks_exact(w as _).zip(0..) {

+ for (&cell, j) in zip(col, 0..) {

+ if cell.style.bg != bgcolor {

+ let cell = Image::<_, 4>::build(sz.ceil() as u32, (ppem * 1.25).ceil() as u32)

+ .fill(cell.style.bg.join(255));

+ unsafe {

+ i.as_mut().overlay_at(

+ &cell,

+ 4 + (j as f32 * sz) as u32,

+ (k as f32 * (ppem * 1.25)) as u32 - 20,

+ )

+ };

+ }

+ }

+ }

+ let mut characters: Vec<Glyph> = vec![Glyph::default(); w];

+

+ for (col, k) in cells.chunks_exact(w as _).zip(0..) {

+ let tokenized = col.iter().enumerate().map(|(i, cell)| {

+ let ch = cell.letter.unwrap_or(' ');

+ (

+ Token {

+ ch,

+ offset: i as u32,

+ len: ch.len_utf8() as u8,

+ info: ch.properties().into(),

+ data: i as u32,

+ },

+ cell.style.flags,

+ )

+ });

+

+ macro_rules! input {

+ ($rule:expr, $font:expr) => {

+ let mut scx = ShapeContext::new();

+ let mut shaper = scx

+ .builder($font)

+ .size(ppem)

+ .script(Script::Latin)

+ .features([

+ ("ss19", 1),

+ ("ss01", 1),

+ ("ss20", 1),

+ ("liga", 1),

+ ("rlig", 1),

+ ])

+ .build();

+

+ let mut cluster = CharCluster::new();

+

+ let mut parser =

+ Parser::new(Script::Latin, tokenized.clone().filter($rule).map(|x| x.0));

+ while parser.next(&mut cluster) {

+ cluster.map(|ch| $font.charmap().map(ch));

+ shaper.add_cluster(&cluster);

+ }

+ shaper.shape_with(|x| {

+ x.glyphs.into_iter().for_each(|x| {

+ characters[x.data as usize] = *x;

+ })

+ });

+ };

+ }

+ input!(|x| x.1 & Style::ITALIC == 0, fonts.regular);

+ input!(|x| x.1 & Style::ITALIC != 0, fonts.bold_italic); // bifont is an instance of ifont

+

+ for (&cell, glyph) in characters.iter().map(|x| (&col[x.data as usize], x)) {

+ let j = glyph.data as usize;

+ let mut color = cell.style.color;

+ if (cell.style.flags & Style::DIM) != 0 {

+ color = color.map(|x| x / 2);

+ }

+ if (cell.style.flags & Style::UNDERLINE) != 0 {

+ unsafe {

+ i.as_mut().overlay_at(

+ &Image::<_, 4>::build(sz.ceil() as u32, 2).fill(color.join(255)),

+ 4 + (j as f32 * sz) as u32,

+ (k as f32 * (ppem * 1.25)) as u32 + 5,

+ )

+ };

+ }

+ if (cell.style.flags & Style::STRIKETHROUGH) != 0 {

+ unsafe {

+ i.as_mut().overlay_at(

+ &Image::<_, 4>::build(sz.ceil() as u32, 2).fill(color.join(255)),

+ 4 + (j as f32 * sz) as u32,

+ (k as f32 * (ppem * 1.25)) as u32 - 5,

+ )

+ };

+ }

+ if let Some(_) = cell.letter {

+ let f = match cell.style.flags {

+ f if f & (Style::BOLD | Style::ITALIC) != 0 => fonts.bold_italic,

+ f if f & Style::BOLD != 0 => fonts.bold,

+ f if f & Style::ITALIC != 0 => fonts.italic,

+ _ => fonts.regular,

+ };

+ let id = glyph.id;

+ let mut scbd = ScaleContext::new();

+ let mut scbd = scbd.builder(f);

+ scbd = scbd.size(ppem);

+

+ let x = Render::new(&[Source::Outline])

+ .format(Format::Alpha)

+ .render(&mut scbd.build(), id)

+ .unwrap();

+ unsafe {

+ if x.placement.width == 0 {

+ continue;

+ }

+ let item = Image::<_, 1>::build(x.placement.width, x.placement.height)

+ .buf_unchecked(x.data);

+ i.as_mut().blend_alpha_and_color_at(

+ &item.as_ref(),

+ color,

+ 4 + ((j as f32 * sz + glyph.x) + x.placement.left as f32).round() as u32,

+ ((k as f32 * (ppem * 1.25)) as u32).saturating_sub(x.placement.top as u32),

+ );

+ }

+ }

+ }

+ }

+

+ // if x.view_o == Some(x.cells.row) || x.view_o.is_none() {

+ // let cell =

+ // Image::<_, 4>::build(3, (ppem * 1.25).ceil() as u32).fill([0xFF, 0xCC, 0x66, 255]);

+ // unsafe {

+ // i.as_mut().overlay_at(

+ // &cell,

+ // 4 + ((x.cursor.0 - 1) as f32 * sz) as u32,

+ // (x.cursor.1 as f32 * (ppem * 1.25)) as u32 - 20,

+ // )

+ // };

+ // }

+ i

+}

+

+pub fn dims(font: &FontRef, ppem: f32) -> (f32, f32) {

+ let m = font.metrics(&[]);

+ (ppem * (m.max_width / m.units_per_em as f32), ppem * 1.25)

+}

+use crate::cell::{Cell, Style};

+use fimg::{Image, OverlayAt};