Improve ergonomics of the canvas font interface, and use the right fonts in the
NanoVG demo.
This commit is contained in:
parent
f823cb9474
commit
ae97ccea5a
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@ -286,6 +286,7 @@ name = "canvas_nanovg"
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version = "0.1.0"
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dependencies = [
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"arrayvec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"font-kit 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"gl 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"image 0.23.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"pathfinder_canvas 0.1.0",
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@ -21,8 +21,7 @@ use pathfinder_geometry::transform2d::Transform2F;
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use pathfinder_geometry::vector::Vector2F;
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use pathfinder_renderer::paint::PaintId;
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use pathfinder_text::{SceneExt, TextRenderMode};
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use skribo::{FontCollection, FontFamily, Layout, TextStyle};
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use std::iter;
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use skribo::{FontCollection, FontFamily, FontRef, Layout, TextStyle};
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use std::sync::Arc;
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impl CanvasRenderingContext2D {
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@ -95,39 +94,16 @@ impl CanvasRenderingContext2D {
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// Text styles
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#[inline]
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pub fn set_font_collection(&mut self, font_collection: Arc<FontCollection>) {
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pub fn font(&self) -> Arc<FontCollection> {
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self.current_state.font_collection.clone()
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}
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#[inline]
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pub fn set_font<FC>(&mut self, font_collection: FC) where FC: IntoFontCollection {
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let font_collection = font_collection.into_font_collection(&self.font_context);
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self.current_state.font_collection = font_collection;
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}
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#[inline]
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pub fn set_font_families<I>(&mut self, font_families: I) where I: Iterator<Item = FontFamily> {
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let mut font_collection = FontCollection::new();
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for font_family in font_families {
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font_collection.add_family(font_family);
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}
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self.current_state.font_collection = Arc::new(font_collection);
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}
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/// A convenience method to set a single font family.
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#[inline]
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pub fn set_font_family(&mut self, font_family: FontFamily) {
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self.set_font_families(iter::once(font_family))
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}
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/// A convenience method to set a single font family consisting of a single font.
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#[inline]
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pub fn set_font(&mut self, font: Font) {
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self.set_font_family(FontFamily::new_from_font(font))
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}
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/// A convenience method to set a single font family consisting of a font
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/// described by a PostScript name.
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#[inline]
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pub fn set_font_by_postscript_name(&mut self, postscript_name: &str) {
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let font = self.font_context.font_source.select_by_postscript_name(postscript_name);
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self.set_font(font.expect("Didn't find the font!").load().unwrap());
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}
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#[inline]
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pub fn font_size(&self) -> f32 {
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self.current_state.font_size
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@ -263,3 +239,99 @@ impl LayoutExt for Layout {
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0.0
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}
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}
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/// Various things that can be conveniently converted into font collections for use with
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/// `CanvasRenderingContext2D::set_font()`.
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pub trait IntoFontCollection {
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fn into_font_collection(self, font_context: &CanvasFontContext) -> Arc<FontCollection>;
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}
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impl IntoFontCollection for Arc<FontCollection> {
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#[inline]
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fn into_font_collection(self, _: &CanvasFontContext) -> Arc<FontCollection> {
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self
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}
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}
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impl IntoFontCollection for FontFamily {
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#[inline]
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fn into_font_collection(self, _: &CanvasFontContext) -> Arc<FontCollection> {
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let mut font_collection = FontCollection::new();
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font_collection.add_family(self);
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Arc::new(font_collection)
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}
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}
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impl IntoFontCollection for Vec<FontFamily> {
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#[inline]
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fn into_font_collection(self, _: &CanvasFontContext) -> Arc<FontCollection> {
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let mut font_collection = FontCollection::new();
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for family in self {
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font_collection.add_family(family);
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}
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Arc::new(font_collection)
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}
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}
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impl IntoFontCollection for Handle {
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#[inline]
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fn into_font_collection(self, context: &CanvasFontContext) -> Arc<FontCollection> {
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self.load().expect("Failed to load the font!").into_font_collection(context)
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}
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}
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impl<'a> IntoFontCollection for &'a [Handle] {
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#[inline]
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fn into_font_collection(self, _: &CanvasFontContext) -> Arc<FontCollection> {
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let mut font_collection = FontCollection::new();
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for handle in self {
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let font = handle.load().expect("Failed to load the font!");
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font_collection.add_family(FontFamily::new_from_font(font));
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}
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Arc::new(font_collection)
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}
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}
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impl IntoFontCollection for Font {
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#[inline]
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fn into_font_collection(self, context: &CanvasFontContext) -> Arc<FontCollection> {
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FontFamily::new_from_font(self).into_font_collection(context)
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}
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}
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impl<'a> IntoFontCollection for &'a [Font] {
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#[inline]
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fn into_font_collection(self, context: &CanvasFontContext) -> Arc<FontCollection> {
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let mut family = FontFamily::new();
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for font in self {
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family.add_font(FontRef::new((*font).clone()))
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}
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family.into_font_collection(context)
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}
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}
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impl<'a> IntoFontCollection for &'a str {
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#[inline]
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fn into_font_collection(self, context: &CanvasFontContext) -> Arc<FontCollection> {
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context.font_source
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.select_by_postscript_name(self)
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.expect("Couldn't find a font with that PostScript name!")
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.into_font_collection(context)
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}
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}
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impl<'a, 'b> IntoFontCollection for &'a [&'b str] {
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#[inline]
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fn into_font_collection(self, context: &CanvasFontContext) -> Arc<FontCollection> {
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let mut font_collection = FontCollection::new();
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for postscript_name in self {
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let font = context.font_source
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.select_by_postscript_name(postscript_name)
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.expect("Failed to find a font with that PostScript name!")
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.load()
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.expect("Failed to load the font!");
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font_collection.add_family(FontFamily::new_from_font(font));
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}
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Arc::new(font_collection)
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}
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}
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@ -6,6 +6,7 @@ edition = "2018"
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[dependencies]
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arrayvec = "0.5"
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font-kit = "0.5"
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gl = "0.14"
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sdl2 = "0.33"
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sdl2-sys = "0.33"
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@ -9,6 +9,8 @@
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// except according to those terms.
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use arrayvec::ArrayVec;
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use font_kit::handle::Handle;
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use font_kit::sources::mem::MemSource;
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use image;
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use pathfinder_canvas::{CanvasFontContext, CanvasRenderingContext2D, LineJoin, Path2D};
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use pathfinder_canvas::{TextAlign, TextBaseline};
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@ -37,6 +39,7 @@ use sdl2::event::Event;
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use sdl2::keyboard::Keycode;
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use sdl2::video::GLProfile;
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use std::f32::consts::PI;
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use std::sync::Arc;
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use std::time::Instant;
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// TODO(pcwalton): See if we can reduce the amount of code by using the canvas shadow feature.
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@ -50,7 +53,7 @@ const WINDOW_HEIGHT: i32 = 768;
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static PARAGRAPH_TEXT: &'static str = "This is a longer chunk of text.
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I would have used lorem ipsum, but she was busy jumping over the lazy dog with the fox and all \
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the men who came to the aid of the party.";
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the men who came to the aid of the party. 🎉";
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fn render_demo(canvas: &mut CanvasRenderingContext2D,
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mouse_position: Vector2F,
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@ -205,6 +208,7 @@ fn draw_paragraph(canvas: &mut CanvasRenderingContext2D, rect: RectF) {
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canvas.save();
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canvas.set_font(&["Roboto-Regular", "NotoEmoji"][..]);
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canvas.set_font_size(18.0);
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let mut cursor = rect.origin();
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@ -553,7 +557,7 @@ fn draw_window(canvas: &mut CanvasRenderingContext2D, title: &str, rect: RectF)
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canvas.set_stroke_style(ColorU::new(0, 0, 0, 32));
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canvas.stroke_path(path);
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// TODO(pcwalton): Bold text.
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canvas.set_font("Roboto-Bold");
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canvas.set_font_size(15.0);
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canvas.set_text_align(TextAlign::Center);
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canvas.set_text_baseline(TextBaseline::Middle);
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@ -578,6 +582,7 @@ fn draw_search_box(canvas: &mut CanvasRenderingContext2D, text: &str, rect: Rect
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ColorU::new(0, 0, 0, 16),
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ColorU::new(0, 0, 0, 92));
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canvas.set_font("Roboto-Bold");
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canvas.set_font_size(17.0);
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canvas.set_fill_style(ColorU::new(255, 255, 255, 64));
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canvas.set_text_align(TextAlign::Left);
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@ -599,6 +604,7 @@ fn draw_dropdown(canvas: &mut CanvasRenderingContext2D, text: &str, rect: RectF)
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canvas.stroke_path(create_rounded_rect_path(rect.contract(vec2f(0.5, 0.5)),
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CORNER_RADIUS - 0.5));
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canvas.set_font("Roboto-Regular");
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canvas.set_font_size(17.0);
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canvas.set_fill_style(ColorU::new(255, 255, 255, 160));
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canvas.set_text_align(TextAlign::Left);
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@ -607,6 +613,7 @@ fn draw_dropdown(canvas: &mut CanvasRenderingContext2D, text: &str, rect: RectF)
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}
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fn draw_label(canvas: &mut CanvasRenderingContext2D, text: &str, rect: RectF) {
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canvas.set_font("Roboto-Regular");
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canvas.set_font_size(15.0);
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canvas.set_fill_style(ColorU::new(255, 255, 255, 128));
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canvas.set_text_align(TextAlign::Left);
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@ -635,6 +642,7 @@ fn draw_edit_box(canvas: &mut CanvasRenderingContext2D, rect: RectF) {
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fn draw_text_edit_box(canvas: &mut CanvasRenderingContext2D, text: &str, rect: RectF) {
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draw_edit_box(canvas, rect);
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canvas.set_font("Roboto-Regular");
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canvas.set_font_size(17.0);
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canvas.set_fill_style(ColorU::new(255, 255, 255, 64));
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canvas.set_text_align(TextAlign::Left);
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@ -648,6 +656,7 @@ fn draw_numeric_edit_box(canvas: &mut CanvasRenderingContext2D,
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rect: RectF) {
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draw_edit_box(canvas, rect);
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canvas.set_font("Roboto-Regular");
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canvas.set_font_size(15.0);
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let unit_width = canvas.measure_text(unit).width;
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@ -667,6 +676,7 @@ fn draw_numeric_edit_box(canvas: &mut CanvasRenderingContext2D,
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fn draw_check_box(canvas: &mut CanvasRenderingContext2D, text: &str, rect: RectF) {
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const CORNER_RADIUS: f32 = 3.0;
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canvas.set_font("Roboto-Regular");
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canvas.set_font_size(15.0);
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canvas.set_fill_style(ColorU::new(255, 255, 255, 160));
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canvas.set_text_align(TextAlign::Left);
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@ -706,8 +716,8 @@ fn draw_button(canvas: &mut CanvasRenderingContext2D, text: &str, rect: RectF, c
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canvas.stroke_path(create_rounded_rect_path(rect.contract(vec2f(0.5, 0.5)),
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CORNER_RADIUS - 0.5));
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// TODO(pcwalton): Bold font.
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// TODO(pcwalton): Icon.
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canvas.set_font("Roboto-Bold");
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canvas.set_font_size(17.0);
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let text_width = canvas.measure_text(text).width;
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let icon_width = 0.0;
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@ -1103,6 +1113,11 @@ fn main() {
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// Load demo data.
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let resources = FilesystemResourceLoader::locate();
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let font_data = vec![
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Handle::from_memory(Arc::new(resources.slurp("fonts/Roboto-Regular.ttf").unwrap()), 0),
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Handle::from_memory(Arc::new(resources.slurp("fonts/Roboto-Bold.ttf").unwrap()), 0),
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Handle::from_memory(Arc::new(resources.slurp("fonts/NotoEmoji-Regular.ttf").unwrap()), 0),
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];
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let demo_data = DemoData::load(&resources);
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// Create a Pathfinder renderer.
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@ -1113,11 +1128,14 @@ fn main() {
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background_color: Some(ColorF::new(0.3, 0.3, 0.32, 1.0)),
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});
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// Initialize state.
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// Initialize font state.
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let font_source = Arc::new(MemSource::from_fonts(font_data.into_iter()).unwrap());
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let font_context = CanvasFontContext::new(font_source.clone());
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// Initialize general state.
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let mut event_pump = sdl_context.event_pump().unwrap();
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let mut mouse_position = Vector2F::zero();
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let start_time = Instant::now();
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let font_context = CanvasFontContext::from_system_source();
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// Enter the main loop.
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loop {
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@ -11,7 +11,7 @@
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use font_kit::handle::Handle;
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use pathfinder_canvas::{CanvasFontContext, CanvasRenderingContext2D, TextAlign};
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use pathfinder_color::ColorF;
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use pathfinder_geometry::vector::{Vector2F, Vector2I, vec2f, vec2i};
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use pathfinder_geometry::vector::{vec2f, vec2i};
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use pathfinder_gl::{GLDevice, GLVersion};
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use pathfinder_renderer::concurrent::rayon::RayonExecutor;
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use pathfinder_renderer::concurrent::scene_proxy::SceneProxy;
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@ -64,7 +64,7 @@ fn main() {
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let mut canvas = CanvasRenderingContext2D::new(font_context, window_size.to_f32());
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// Draw the text.
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canvas.set_font_by_postscript_name("Overpass-Regular");
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canvas.set_font("Overpass-Regular");
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canvas.set_font_size(32.0);
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canvas.fill_text("Hello Pathfinder!", vec2f(32.0, 48.0));
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canvas.set_text_align(TextAlign::Right);
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@ -0,0 +1,202 @@
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Apache License
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Version 2.0, January 2004
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http://www.apache.org/licenses/
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TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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||||
as of the date such litigation is filed.
|
||||
|
||||
4. Redistribution. You may reproduce and distribute copies of the
|
||||
Work or Derivative Works thereof in any medium, with or without
|
||||
modifications, and in Source or Object form, provided that You
|
||||
meet the following conditions:
|
||||
|
||||
(a) You must give any other recipients of the Work or
|
||||
Derivative Works a copy of this License; and
|
||||
|
||||
(b) You must cause any modified files to carry prominent notices
|
||||
stating that You changed the files; and
|
||||
|
||||
(c) You must retain, in the Source form of any Derivative Works
|
||||
that You distribute, all copyright, patent, trademark, and
|
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attribution notices from the Source form of the Work,
|
||||
excluding those notices that do not pertain to any part of
|
||||
the Derivative Works; and
|
||||
|
||||
(d) If the Work includes a "NOTICE" text file as part of its
|
||||
distribution, then any Derivative Works that You distribute must
|
||||
include a readable copy of the attribution notices contained
|
||||
within such NOTICE file, excluding those notices that do not
|
||||
pertain to any part of the Derivative Works, in at least one
|
||||
of the following places: within a NOTICE text file distributed
|
||||
as part of the Derivative Works; within the Source form or
|
||||
documentation, if provided along with the Derivative Works; or,
|
||||
within a display generated by the Derivative Works, if and
|
||||
wherever such third-party notices normally appear. The contents
|
||||
of the NOTICE file are for informational purposes only and
|
||||
do not modify the License. You may add Your own attribution
|
||||
notices within Derivative Works that You distribute, alongside
|
||||
or as an addendum to the NOTICE text from the Work, provided
|
||||
that such additional attribution notices cannot be construed
|
||||
as modifying the License.
|
||||
|
||||
You may add Your own copyright statement to Your modifications and
|
||||
may provide additional or different license terms and conditions
|
||||
for use, reproduction, or distribution of Your modifications, or
|
||||
for any such Derivative Works as a whole, provided Your use,
|
||||
reproduction, and distribution of the Work otherwise complies with
|
||||
the conditions stated in this License.
|
||||
|
||||
5. Submission of Contributions. Unless You explicitly state otherwise,
|
||||
any Contribution intentionally submitted for inclusion in the Work
|
||||
by You to the Licensor shall be under the terms and conditions of
|
||||
this License, without any additional terms or conditions.
|
||||
Notwithstanding the above, nothing herein shall supersede or modify
|
||||
the terms of any separate license agreement you may have executed
|
||||
with Licensor regarding such Contributions.
|
||||
|
||||
6. Trademarks. This License does not grant permission to use the trade
|
||||
names, trademarks, service marks, or product names of the Licensor,
|
||||
except as required for reasonable and customary use in describing the
|
||||
origin of the Work and reproducing the content of the NOTICE file.
|
||||
|
||||
7. Disclaimer of Warranty. Unless required by applicable law or
|
||||
agreed to in writing, Licensor provides the Work (and each
|
||||
Contributor provides its Contributions) on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
||||
implied, including, without limitation, any warranties or conditions
|
||||
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
|
||||
PARTICULAR PURPOSE. You are solely responsible for determining the
|
||||
appropriateness of using or redistributing the Work and assume any
|
||||
risks associated with Your exercise of permissions under this License.
|
||||
|
||||
8. Limitation of Liability. In no event and under no legal theory,
|
||||
whether in tort (including negligence), contract, or otherwise,
|
||||
unless required by applicable law (such as deliberate and grossly
|
||||
negligent acts) or agreed to in writing, shall any Contributor be
|
||||
liable to You for damages, including any direct, indirect, special,
|
||||
incidental, or consequential damages of any character arising as a
|
||||
result of this License or out of the use or inability to use the
|
||||
Work (including but not limited to damages for loss of goodwill,
|
||||
work stoppage, computer failure or malfunction, or any and all
|
||||
other commercial damages or losses), even if such Contributor
|
||||
has been advised of the possibility of such damages.
|
||||
|
||||
9. Accepting Warranty or Additional Liability. While redistributing
|
||||
the Work or Derivative Works thereof, You may choose to offer,
|
||||
and charge a fee for, acceptance of support, warranty, indemnity,
|
||||
or other liability obligations and/or rights consistent with this
|
||||
License. However, in accepting such obligations, You may act only
|
||||
on Your own behalf and on Your sole responsibility, not on behalf
|
||||
of any other Contributor, and only if You agree to indemnify,
|
||||
defend, and hold each Contributor harmless for any liability
|
||||
incurred by, or claims asserted against, such Contributor by reason
|
||||
of your accepting any such warranty or additional liability.
|
||||
|
||||
END OF TERMS AND CONDITIONS
|
||||
|
||||
APPENDIX: How to apply the Apache License to your work.
|
||||
|
||||
To apply the Apache License to your work, attach the following
|
||||
boilerplate notice, with the fields enclosed by brackets "[]"
|
||||
replaced with your own identifying information. (Don't include
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||||
the brackets!) The text should be enclosed in the appropriate
|
||||
comment syntax for the file format. We also recommend that a
|
||||
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|
||||
same "printed page" as the copyright notice for easier
|
||||
identification within third-party archives.
|
||||
|
||||
Copyright [yyyy] [name of copyright owner]
|
||||
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
You may obtain a copy of the License at
|
||||
|
||||
http://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
Unless required by applicable law or agreed to in writing, software
|
||||
distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
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