73 lines
2.4 KiB
Rust
73 lines
2.4 KiB
Rust
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use pathfinder_renderer::{scene::Scene};
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use pathfinder_geometry::{outline::Outline, color::ColorF, segment::{Segment, SegmentKind}, basic::{vector::Vector2F, rect::RectF}};
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use std::io::Write;
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mod pdf;
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use pdf::Pdf;
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pub struct PdfBuilder {
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pdf: Pdf
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}
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impl PdfBuilder {
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pub fn new() -> PdfBuilder {
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PdfBuilder {
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pdf: Pdf::new()
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}
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}
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pub fn add_scene(&mut self, scene: &Scene) {
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let view_box = scene.view_box();
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self.pdf.add_page(view_box.size());
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let height = view_box.size().y();
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let tr = |v: Vector2F| -> Vector2F {
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let r = v - view_box.origin();
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Vector2F::new(r.x(), height - r.y())
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};
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for (paint, outline) in scene.paths() {
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self.pdf.set_fill_color(paint.color);
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for contour in outline.contours() {
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for (segment_index, segment) in contour.iter().enumerate() {
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if segment_index == 0 {
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self.pdf.move_to(tr(segment.baseline.from()));
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}
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match segment.kind {
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SegmentKind::None => {}
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SegmentKind::Line => self.pdf.line_to(tr(segment.baseline.to())),
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SegmentKind::Quadratic => {
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let current = segment.baseline.from();
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let c = segment.ctrl.from();
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let p = segment.baseline.to();
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let c1 = Vector2F::splat(2./3.) * c + Vector2F::splat(1./3.) * current;
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let c2 = Vector2F::splat(2./3.) * c + Vector2F::splat(1./3.) * p;
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self.pdf.cubic_to(c1, c2, p);
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}
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SegmentKind::Cubic => self.pdf.cubic_to(tr(segment.ctrl.from()), tr(segment.ctrl.to()), tr(segment.baseline.to()))
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}
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}
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if contour.is_closed() {
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self.pdf.close();
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}
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}
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// closes implicitly
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self.pdf.fill();
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}
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}
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pub fn write<W: Write>(mut self, out: W) {
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self.pdf.write_to(out);
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}
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}
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pub fn make_pdf<W: Write>(mut writer: W, scene: &Scene) {
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let mut pdf = PdfBuilder::new();
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pdf.add_scene(scene);
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pdf.write(writer);
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}
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