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Add line height and character spacing to the Text node (#2016)

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Keavon Chambers 2024-10-01 12:28:27 -07:00 • committed by GitHub
parent 904cf09c79
commit 2d86fb24ab
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GPG key ID: B5690EEEBB952194
10 changed files with 127 additions and 34 deletions
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30
node-graph/gcore/src/text/to_path.rs
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@ -53,9 +53,9 @@ impl OutlineBuilder for Builder {
}
}
fn font_properties(buzz_face: &rustybuzz::Face, font_size: f64) -> (f64, f64, UnicodeBuffer) {
fn font_properties(buzz_face: &rustybuzz::Face, font_size: f64, line_height_ratio: f64) -> (f64, f64, UnicodeBuffer) {
let scale = (buzz_face.units_per_em() as f64).recip() * font_size;
let line_height = font_size;
let line_height = font_size * line_height_ratio;
let buffer = UnicodeBuffer::new();
(scale, line_height, buffer)
}
@ -68,10 +68,10 @@ fn push_str(buffer: &mut UnicodeBuffer, word: &str, trailing_space: bool) {
}
}
fn wrap_word(line_width: Option<f64>, glyph_buffer: &GlyphBuffer, scale: f64, x_pos: f64) -> bool {
fn wrap_word(line_width: Option<f64>, glyph_buffer: &GlyphBuffer, font_size: f64, character_spacing: f64, x_pos: f64) -> bool {
if let Some(line_width) = line_width {
let word_length: i32 = glyph_buffer.glyph_positions().iter().map(|pos| pos.x_advance).sum();
let scaled_word_length = word_length as f64 * scale;
let word_length: f64 = glyph_buffer.glyph_positions().iter().map(|pos| pos.x_advance as f64 * character_spacing).sum();
let scaled_word_length = word_length * font_size;
if scaled_word_length + x_pos > line_width {
return true;
@ -80,14 +80,14 @@ fn wrap_word(line_width: Option<f64>, glyph_buffer: &GlyphBuffer, scale: f64, x_
false
}
pub fn to_path(str: &str, buzz_face: Option<rustybuzz::Face>, font_size: f64, line_width: Option<f64>) -> Vec<Subpath<PointId>> {
pub fn to_path(str: &str, buzz_face: Option<rustybuzz::Face>, font_size: f64, line_height_ratio: f64, character_spacing: f64, line_width: Option<f64>) -> Vec<Subpath<PointId>> {
let buzz_face = match buzz_face {
Some(face) => face,
// Show blank layer if font has not loaded
None => return vec![],
};
let (scale, line_height, mut buffer) = font_properties(&buzz_face, font_size);
let (scale, line_height, mut buffer) = font_properties(&buzz_face, font_size, line_height_ratio);
let mut builder = Builder {
current_subpath: Subpath::new(Vec::new(), false),
@ -105,13 +105,13 @@ pub fn to_path(str: &str, buzz_face: Option<rustybuzz::Face>, font_size: f64, li
push_str(&mut buffer, word, index != length - 1);
let glyph_buffer = rustybuzz::shape(&buzz_face, &[], buffer);
if wrap_word(line_width, &glyph_buffer, scale, builder.pos.x) {
if wrap_word(line_width, &glyph_buffer, scale, character_spacing, builder.pos.x) {
builder.pos = DVec2::new(0., builder.pos.y + line_height);
}
for (glyph_position, glyph_info) in glyph_buffer.glyph_positions().iter().zip(glyph_buffer.glyph_infos()) {
if let Some(line_width) = line_width {
if builder.pos.x + (glyph_position.x_advance as f64 * builder.scale) >= line_width {
if builder.pos.x + (glyph_position.x_advance as f64 * builder.scale * character_spacing) >= line_width {
builder.pos = DVec2::new(0., builder.pos.y + line_height);
}
}
@ -121,7 +121,7 @@ pub fn to_path(str: &str, buzz_face: Option<rustybuzz::Face>, font_size: f64, li
builder.other_subpaths.push(core::mem::replace(&mut builder.current_subpath, Subpath::new(Vec::new(), false)));
}
builder.pos += DVec2::new(glyph_position.x_advance as f64, glyph_position.y_advance as f64) * builder.scale;
builder.pos += DVec2::new(glyph_position.x_advance as f64 * character_spacing, glyph_position.y_advance as f64) * builder.scale;
}
buffer = glyph_buffer.clear();
@ -131,14 +131,14 @@ pub fn to_path(str: &str, buzz_face: Option<rustybuzz::Face>, font_size: f64, li
builder.other_subpaths
}
pub fn bounding_box(str: &str, buzz_face: Option<rustybuzz::Face>, font_size: f64, line_width: Option<f64>) -> DVec2 {
pub fn bounding_box(str: &str, buzz_face: Option<rustybuzz::Face>, font_size: f64, line_height_ratio: f64, character_spacing: f64, line_width: Option<f64>) -> DVec2 {
let buzz_face = match buzz_face {
Some(face) => face,
// Show blank layer if font has not loaded
None => return DVec2::ZERO,
};
let (scale, line_height, mut buffer) = font_properties(&buzz_face, font_size);
let (scale, line_height, mut buffer) = font_properties(&buzz_face, font_size, line_height_ratio);
let mut pos = DVec2::ZERO;
let mut bounds = DVec2::ZERO;
@ -150,17 +150,17 @@ pub fn bounding_box(str: &str, buzz_face: Option<rustybuzz::Face>, font_size: f6
let glyph_buffer = rustybuzz::shape(&buzz_face, &[], buffer);
if wrap_word(line_width, &glyph_buffer, scale, pos.x) {
if wrap_word(line_width, &glyph_buffer, scale, character_spacing, pos.x) {
pos = DVec2::new(0., pos.y + line_height);
}
for glyph_position in glyph_buffer.glyph_positions() {
if let Some(line_width) = line_width {
if pos.x + (glyph_position.x_advance as f64 * scale) >= line_width {
if pos.x + (glyph_position.x_advance as f64 * scale * character_spacing) >= line_width {
pos = DVec2::new(0., pos.y + line_height);
}
}
pos += DVec2::new(glyph_position.x_advance as f64, glyph_position.y_advance as f64) * scale;
pos += DVec2::new(glyph_position.x_advance as f64 * character_spacing, glyph_position.y_advance as f64) * scale;
}
bounds = bounds.max(pos + DVec2::new(0., line_height));