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Merge pull request rust-windowing#205 from s3bk/ps_export
Unify exports into the export crate.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,173 @@ | ||
| use pathfinder_renderer::scene::Scene; | ||
| use pathfinder_geometry::vector::Vector2F; | ||
| use pathfinder_content::segment::SegmentKind; | ||
| use std::io::{self, Write}; | ||
| use std::fmt; | ||
|
|
||
| mod pdf; | ||
| use pdf::Pdf; | ||
|
|
||
| pub enum FileFormat { | ||
| /// Scalable Vector Graphics | ||
| SVG, | ||
|
|
||
| /// Portable Document Format | ||
| PDF, | ||
|
|
||
| /// PostScript | ||
| PS, | ||
| } | ||
|
|
||
| pub trait Export { | ||
| fn export<W: Write>(&self, writer: &mut W, format: FileFormat) -> io::Result<()>; | ||
| } | ||
| impl Export for Scene { | ||
| fn export<W: Write>(&self, writer: &mut W, format: FileFormat) -> io::Result<()> { | ||
| match format { | ||
| FileFormat::SVG => export_svg(self, writer), | ||
| FileFormat::PDF => export_pdf(self, writer), | ||
| FileFormat::PS => export_ps(self, writer) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fn export_svg<W: Write>(scene: &Scene, writer: &mut W) -> io::Result<()> { | ||
| let view_box = scene.view_box(); | ||
| writeln!( | ||
| writer, | ||
| "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"{} {} {} {}\">", | ||
| view_box.origin().x(), | ||
| view_box.origin().y(), | ||
| view_box.size().x(), | ||
| view_box.size().y() | ||
| )?; | ||
| for (paint, outline, name) in scene.paths() { | ||
| write!(writer, " <path")?; | ||
| if !name.is_empty() { | ||
| write!(writer, " id=\"{}\"", name)?; | ||
| } | ||
| writeln!( | ||
| writer, | ||
| " fill=\"{:?}\" d=\"{:?}\" />", | ||
| paint.color, outline | ||
| )?; | ||
| } | ||
| writeln!(writer, "</svg>")?; | ||
| Ok(()) | ||
| } | ||
|
|
||
| fn export_pdf<W: Write>(scene: &Scene, writer: &mut W) -> io::Result<()> { | ||
| let mut pdf = Pdf::new(); | ||
| let view_box = scene.view_box(); | ||
| pdf.add_page(view_box.size()); | ||
|
|
||
| let height = view_box.size().y(); | ||
| let tr = |v: Vector2F| -> Vector2F { | ||
| let r = v - view_box.origin(); | ||
| Vector2F::new(r.x(), height - r.y()) | ||
| }; | ||
|
|
||
| for (paint, outline, _) in scene.paths() { | ||
| pdf.set_fill_color(paint.color); | ||
|
|
||
| for contour in outline.contours() { | ||
| for (segment_index, segment) in contour.iter().enumerate() { | ||
| if segment_index == 0 { | ||
| pdf.move_to(tr(segment.baseline.from())); | ||
| } | ||
|
|
||
| match segment.kind { | ||
| SegmentKind::None => {} | ||
| SegmentKind::Line => pdf.line_to(tr(segment.baseline.to())), | ||
| SegmentKind::Quadratic => { | ||
| let current = segment.baseline.from(); | ||
| let c = segment.ctrl.from(); | ||
| let p = segment.baseline.to(); | ||
| let c1 = Vector2F::splat(2./3.) * c + Vector2F::splat(1./3.) * current; | ||
| let c2 = Vector2F::splat(2./3.) * c + Vector2F::splat(1./3.) * p; | ||
| pdf.cubic_to(c1, c2, p); | ||
| } | ||
| SegmentKind::Cubic => pdf.cubic_to(tr(segment.ctrl.from()), tr(segment.ctrl.to()), tr(segment.baseline.to())) | ||
| } | ||
| } | ||
|
|
||
| if contour.is_closed() { | ||
| pdf.close(); | ||
| } | ||
| } | ||
|
|
||
| // closes implicitly | ||
| pdf.fill(); | ||
| } | ||
| pdf.write_to(writer) | ||
| } | ||
|
|
||
| fn export_ps<W: Write>(scene: &Scene, writer: &mut W) -> io::Result<()> { | ||
| struct P(Vector2F); | ||
| impl fmt::Display for P { | ||
| fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { | ||
| write!(f, "{} {}", self.0.x(), self.0.y()) | ||
| } | ||
| } | ||
|
|
||
| let view_box = scene.view_box(); | ||
| writeln!(writer, "%!PS-Adobe-3.0 EPSF-3.0")?; | ||
| writeln!(writer, "%%BoundingBox: {:.0} {:.0}", | ||
| P(view_box.origin()), | ||
| P(view_box.size()), | ||
| )?; | ||
| writeln!(writer, "%%HiResBoundingBox: {} {}", | ||
| P(view_box.origin()), | ||
| P(view_box.size()), | ||
| )?; | ||
| writeln!(writer, "0 {} translate", view_box.size().y())?; | ||
| writeln!(writer, "1 -1 scale")?; | ||
|
|
||
| for (paint, outline, name) in scene.paths() { | ||
| if !name.is_empty() { | ||
| writeln!(writer, "newpath % {}", name)?; | ||
| } else { | ||
| writeln!(writer, "newpath")?; | ||
| } | ||
| let color = paint.color.to_f32(); | ||
| for contour in outline.contours() { | ||
| for (segment_index, segment) in contour.iter().enumerate() { | ||
| if segment_index == 0 { | ||
| writeln!(writer, "{} moveto", P(segment.baseline.from()))?; | ||
| } | ||
|
|
||
| match segment.kind { | ||
| SegmentKind::None => {} | ||
| SegmentKind::Line => { | ||
| writeln!(writer, "{} lineto", P(segment.baseline.to()))?; | ||
| } | ||
| SegmentKind::Quadratic => { | ||
| let current = segment.baseline.from(); | ||
| let c = segment.ctrl.from(); | ||
| let p = segment.baseline.to(); | ||
| let c1 = Vector2F::splat(2. / 3.) * c + Vector2F::splat(1. / 3.) * current; | ||
| let c2 = Vector2F::splat(2. / 3.) * c + Vector2F::splat(1. / 3.) * p; | ||
| writeln!(writer, "{} {} {} curveto", P(c1), P(c2), P(p))?; | ||
| } | ||
| SegmentKind::Cubic => { | ||
| writeln!(writer, "{} {} {} curveto", | ||
| P(segment.ctrl.from()), | ||
| P(segment.ctrl.to()), | ||
| P(segment.baseline.to()) | ||
| )?; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if contour.is_closed() { | ||
| writeln!(writer, "closepath")?; | ||
| } | ||
| } | ||
| writeln!(writer, "{} {} {} setrgbcolor", color.r(), color.g(), color.b())?; | ||
| writeln!(writer, "fill")?; | ||
| } | ||
| writeln!(writer, "showpage")?; | ||
| Ok(()) | ||
| } | ||
|
|
||
|
|
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