mirror of
https://github.com/italicsjenga/vello.git
synced 2025-01-10 12:41:30 +11:00
Switch to swash
Use swash instead of ttf-parser. We can definitely do higher-level use of the swash crate, but this leaves the integration pretty much as-is.
This commit is contained in:
Raph Levien
parent
660d7b8e91
commit
9cab8b8131
34
Cargo.lock
generated
34
Cargo.lock
generated
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@ -1,5 +1,7 @@
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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version = 3
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[[package]]
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name = "ab_glyph_rasterizer"
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version = "0.1.4"
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@ -795,7 +797,7 @@ version = "0.6.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9f923fb806c46266c02ab4a5b239735c144bdeda724a50ed058e5226f594cde3"
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dependencies = [
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"ttf-parser 0.6.2",
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"ttf-parser",
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]
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[[package]]
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@ -855,7 +857,7 @@ dependencies = [
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"rand",
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"raw-window-handle",
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"roxmltree",
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"ttf-parser 0.12.0",
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"swash",
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"winit",
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]
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@ -1102,6 +1104,16 @@ version = "0.9.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "6446ced80d6c486436db5c078dde11a9f73d42b57fb273121e160b84f63d894c"
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[[package]]
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name = "swash"
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version = "0.1.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "a1bdb2004b76b5f5f3afe722d70b1aea160d2362cb7e40716a7106197ee7f82d"
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dependencies = [
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"yazi",
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"zeno",
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]
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[[package]]
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name = "syn"
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version = "1.0.48"
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@ -1157,12 +1169,6 @@ version = "0.6.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "3e5d7cd7ab3e47dda6e56542f4bbf3824c15234958c6e1bd6aaa347e93499fdc"
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[[package]]
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name = "ttf-parser"
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version = "0.12.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "85e00391c1f3d171490a3f8bd79999b0002ae38d3da0d6a3a306c754b053d71b"
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[[package]]
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name = "unic-bidi"
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version = "0.9.0"
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@ -1459,3 +1465,15 @@ name = "xmlparser"
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version = "0.13.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "114ba2b24d2167ef6d67d7d04c8cc86522b87f490025f39f0303b7db5bf5e3d8"
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[[package]]
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name = "yazi"
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version = "0.1.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c03b3e19c937b5b9bd8e52b1c88f30cce5c0d33d676cf174866175bb794ff658"
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[[package]]
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name = "zeno"
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version = "0.2.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c110ba09c9b3a43edd4803d570df0da2414fed6e822e22b976a4e3ef50860701"
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@ -32,7 +32,7 @@ rand = "0.7.3"
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roxmltree = "0.13"
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winit = "0.23"
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clap = "2.33"
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ttf-parser = "0.12"
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swash = "0.1.4"
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[target.'cfg(target_os = "android")'.dependencies]
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ndk = "0.3"
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@ -100,8 +100,7 @@ impl GfxState {
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) -> Result<GfxState, Error> {
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unsafe {
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let device = instance.device(surface)?;
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let mut swapchain =
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instance.swapchain(width, height, &device, surface.unwrap())?;
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let mut swapchain = instance.swapchain(width, height, &device, surface.unwrap())?;
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let session = Session::new(device);
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let mut current_frame = 0;
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let present_semaphores = (0..NUM_FRAMES)
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@ -1,6 +1,8 @@
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use std::ops::RangeBounds;
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use ttf_parser::{Face, GlyphId, OutlineBuilder};
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use swash::scale::ScaleContext;
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use swash::zeno::{Vector, Verb};
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use swash::{FontRef, GlyphId};
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use piet::kurbo::{Point, Rect, Size};
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use piet::{
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@ -18,7 +20,9 @@ const FONT_DATA: &[u8] = include_bytes!("../third-party/Roboto-Regular.ttf");
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#[derive(Clone)]
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pub struct Font {
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face: Face<'static>,
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// Storing the font_ref is ok for static font data, but the better way to do
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// this is to store the CacheKey.
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font_ref: FontRef<'static>,
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}
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#[derive(Clone)]
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@ -48,8 +52,6 @@ struct Glyph {
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#[derive(Default)]
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pub struct PathEncoder {
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start_pt: [f32; 2],
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cur_pt: [f32; 2],
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elements: Vec<Element>,
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}
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@ -112,14 +114,79 @@ impl TextLayout for PietGpuTextLayout {
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impl Font {
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pub fn new() -> Font {
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let face = Face::from_slice(FONT_DATA, 0).expect("error parsing font");
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Font { face }
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let font_ref = FontRef::from_index(FONT_DATA, 0).expect("error parsing font");
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Font { font_ref }
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}
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fn make_path(&self, glyph_id: GlyphId) -> PathEncoder {
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/*
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let mut encoder = PathEncoder::default();
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self.face.outline_glyph(glyph_id, &mut encoder);
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encoder
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*/
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// Should the scale context be in the font? In the RenderCtx?
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let mut scale_context = ScaleContext::new();
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let mut scaler = scale_context.builder(self.font_ref).size(2048.).build();
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let mut encoder = PathEncoder::default();
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if let Some(outline) = scaler.scale_outline(glyph_id) {
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let verbs = outline.verbs();
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let points = outline.points();
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let elements = &mut encoder.elements;
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let mut i = 0;
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let mut start_pt = [0.0f32; 2];
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let mut last_pt = [0.0f32; 2];
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for verb in verbs {
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match verb {
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Verb::MoveTo => {
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start_pt = convert_swash_point(points[i]);
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last_pt = start_pt;
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i += 1;
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}
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Verb::LineTo => {
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let p1 = convert_swash_point(points[i]);
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elements.push(Element::Line(LineSeg {
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p0: last_pt,
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p1,
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}));
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last_pt = p1;
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i += 1;
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}
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Verb::QuadTo => {
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let p1 = convert_swash_point(points[i]);
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let p2 = convert_swash_point(points[i + 1]);
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elements.push(Element::Quad(QuadSeg {
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p0: last_pt,
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p1,
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p2,
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}));
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last_pt = p2;
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i += 2;
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}
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Verb::CurveTo => {
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let p1 = convert_swash_point(points[i]);
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let p2 = convert_swash_point(points[i + 1]);
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let p3 = convert_swash_point(points[i + 2]);
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elements.push(Element::Cubic(CubicSeg {
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p0: last_pt,
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p1,
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p2,
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p3,
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}));
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last_pt = p3;
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i += 3;
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}
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Verb::Close => {
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if start_pt != last_pt {
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elements.push(Element::Line(LineSeg {
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p0: last_pt,
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p1: start_pt,
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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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encoder
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}
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}
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@ -129,24 +196,23 @@ impl PietGpuTextLayout {
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let mut x = 0.0;
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let y = 0.0;
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for c in text.chars() {
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if let Some(glyph_id) = font.face.glyph_index(c) {
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let glyph_id = font.font_ref.charmap().map(c);
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let glyph = Glyph { glyph_id, x, y };
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glyphs.push(glyph);
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if let Some(adv) = font.face.glyph_hor_advance(glyph_id) {
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x += adv as f32;
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}
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}
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let adv = font.font_ref.glyph_metrics(&[]).advance_width(glyph_id);
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x += adv;
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}
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PietGpuTextLayout {
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glyphs,
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font: font.clone(),
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size: size,
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size,
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}
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}
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pub(crate) fn draw_text(&self, ctx: &mut PietGpuRenderContext, pos: Point) {
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const DEFAULT_UPEM: u16 = 1024;
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let scale = self.size as f32 / self.font.face.units_per_em().unwrap_or(DEFAULT_UPEM) as f32;
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// Should we use ppem from font, or let swash scale?
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const DEFAULT_UPEM: u16 = 2048;
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let scale = self.size as f32 / DEFAULT_UPEM as f32;
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let mut inv_transform = None;
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// TODO: handle y offsets also
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let mut last_x = 0.0;
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}
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}
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impl OutlineBuilder for PathEncoder {
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fn move_to(&mut self, x: f32, y: f32) {
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self.start_pt = [x, y];
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self.cur_pt = [x, y];
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}
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fn line_to(&mut self, x: f32, y: f32) {
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let p1 = [x, y];
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let seg = LineSeg {
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p0: self.cur_pt,
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p1: p1,
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};
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self.cur_pt = p1;
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self.elements.push(Element::Line(seg));
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}
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fn quad_to(&mut self, x1: f32, y1: f32, x: f32, y: f32) {
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let p1 = [x1, y1];
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let p2 = [x, y];
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let seg = QuadSeg {
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p0: self.cur_pt,
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p1: p1,
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p2: p2,
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};
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self.cur_pt = p2;
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self.elements.push(Element::Quad(seg));
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}
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fn curve_to(&mut self, x1: f32, y1: f32, x2: f32, y2: f32, x: f32, y: f32) {
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let p1 = [x1, y1];
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let p2 = [x2, y2];
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let p3 = [x, y];
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let seg = CubicSeg {
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p0: self.cur_pt,
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p1: p1,
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p2: p2,
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p3: p3,
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};
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self.cur_pt = p3;
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self.elements.push(Element::Cubic(seg));
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}
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fn close(&mut self) {
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if self.cur_pt != self.start_pt {
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let seg = LineSeg {
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p0: self.cur_pt,
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p1: self.start_pt,
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};
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self.elements.push(Element::Line(seg));
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}
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}
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}
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impl PathEncoder {
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pub(crate) fn elements(&self) -> &[Element] {
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&self.elements
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}
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}
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fn convert_swash_point(v: Vector) -> [f32; 2] {
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[v.x, v.y]
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}
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