63 lines
2 KiB
Rust
63 lines
2 KiB
Rust
use core::marker::PhantomData;
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use super::FontLineIndex;
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pub struct FontLayoutGlyph<'a, T: 'a> {
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pub start: usize,
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pub end: usize,
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pub x: f32,
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pub w: f32,
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#[cfg(feature = "ab_glyph")]
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pub inner: Option<ab_glyph::OutlinedGlyph>,
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#[cfg(feature = "rusttype")]
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pub inner: rusttype::PositionedGlyph<'a>,
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#[cfg(feature = "swash")]
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pub inner: (i32, i32, Option<swash::scale::image::Image>),
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pub phantom: PhantomData<&'a T>,
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}
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pub struct FontLayoutLine<'a> {
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pub line_i: FontLineIndex,
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pub glyphs: Vec<FontLayoutGlyph<'a, ()>>,
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}
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impl<'a> FontLayoutLine<'a> {
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pub fn draw<F: FnMut(i32, i32, u8)>(&self, mut f: F) {
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for glyph in self.glyphs.iter() {
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#[cfg(feature = "ab_glyph")]
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if let Some(ref outline) = glyph.inner {
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let bb = outline.px_bounds();
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let x = bb.min.x as i32;
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let y = bb.min.y as i32;
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outline.draw(|off_x, off_y, v| {
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f(x + off_x as i32, y + off_y as i32, (v * 255.0) as u8);
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});
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}
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#[cfg(feature = "rusttype")]
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if let Some(bb) = glyph.inner.pixel_bounding_box() {
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let x = bb.min.x;
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let y = bb.min.y;
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glyph.inner.draw(|off_x, off_y, v| {
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f(x + off_x as i32, y + off_y as i32, (v * 255.0) as u8);
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});
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}
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#[cfg(feature = "swash")]
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if let Some(ref image) = glyph.inner.2 {
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assert_eq!(image.content, swash::scale::image::Content::Mask);
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let x = glyph.inner.0 + image.placement.left;
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let y = glyph.inner.1 - image.placement.top;
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let mut i = 0;
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for off_y in 0..image.placement.height as i32 {
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for off_x in 0..image.placement.width as i32 {
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f(x + off_x, y + off_y, image.data[i]);
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i += 1;
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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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