Add example rendering to minifb

Cargo.toml

@@ -18,6 +18,9 @@ png = "0.14.0"
 typed-arena = "1.4.1"
 sw-composite = "0.5.10"
 
+[dev-dependencies]
+minifb = "0.11"
+
 [features]
 default = ["text"]
 text = ["font-kit"]

examples/minifb.rs

@@ -0,0 +1,155 @@
+extern crate raqote;
+
+use raqote::*;
+use sw_composite::{Gradient, GradientStop};
+use minifb::{Window, WindowOptions, Key};
+
+use font_kit::family_name::FamilyName;
+use font_kit::properties::Properties;
+use font_kit::source::SystemSource;
+
+fn main() {
+    let mut window = match Window::new("raqote via minifb",
+            400, 400,
+            WindowOptions {
+                resize: false,   // NOTE: minifb appears to have issues with resizing
+                ..WindowOptions::default()
+            }) {
+        Ok(win) => win,
+        Err(err) => {
+            println!("Unable to create window {}", err);
+            return;
+        }
+    };
+
+    let mut size = (0, 0);
+    println!("Opened window with size {}×{}", size.0, size.1);
+    let mut dt = DrawTarget::new(0, 0);
+
+    while window.is_open() && !window.is_key_down(Key::Escape) {
+        let new_size = window.get_size();
+        if new_size != size {
+            size = new_size;
+            println!("Rendering at {}×{}", size.0, size.1);
+            dt = DrawTarget::new(size.0 as i32, size.1 as i32);
+            render(&mut dt);
+        }
+
+        if size.0 * size.1 > 0 {
+            window.update_with_buffer(dt.get_data()).unwrap();
+        } else {
+            window.update();
+        }
+    }
+}
+
+fn render(dt: &mut DrawTarget) {
+    let mut pb = PathBuilder::new();
+    pb.move_to(340., 190.);
+    pb.arc(160., 190., 180., 0., 2. * 3.14159);
+    pb.close();
+    let path = pb.finish();
+    dt.push_clip(&path);
+
+    let mut pb = PathBuilder::new();
+    pb.move_to(0., 0.);
+    pb.line_to(200., 0.);
+    pb.line_to(200., 300.);
+    pb.line_to(0., 300.);
+    pb.close();
+    let path = pb.finish();
+    dt.fill(
+        &path,
+        &Source::Solid(SolidSource {
+            r: 0x80,
+            g: 0x80,
+            b: 0,
+            a: 0x80,
+        }),
+        &DrawOptions::new(),
+    );
+
+    let mut pb = PathBuilder::new();
+    pb.move_to(50., 50.);
+    pb.line_to(100., 70.);
+    pb.line_to(110., 150.);
+    pb.line_to(40., 180.);
+    pb.close();
+
+    let mut pb = PathBuilder::new();
+    pb.move_to(100., 10.);
+    pb.quad_to(150., 40., 200., 10.);
+    pb.quad_to(120., 100., 80., 200.);
+    pb.quad_to(150., 180., 200., 200.);
+    pb.close();
+
+    pb.move_to(100., 10.);
+    pb.cubic_to(150., 40., 175., 0., 200., 10.);
+    pb.quad_to(120., 100., 80., 200.);
+    pb.quad_to(150., 180., 200., 200.);
+    pb.close();
+
+    let path = pb.finish();
+
+    let gradient = Source::RadialGradient(
+        Gradient {
+            stops: vec![
+                GradientStop {
+                    position: 0.2,
+                    color: 0xff00ff00,
+                },
+                GradientStop {
+                    position: 0.8,
+                    color: 0xffffffff,
+                },
+                GradientStop {
+                    position: 1.,
+                    color: 0xffff00ff,
+                },
+            ],
+        },
+        Spread::Pad,
+        Transform::create_translation(-150., -150.),
+    );
+    dt.fill(&path, &gradient, &DrawOptions::new());
+
+    let mut pb = PathBuilder::new();
+    pb.move_to(200., 200.);
+    pb.line_to(300., 300.);
+    pb.line_to(200., 300.);
+
+    let path = pb.finish();
+    dt.stroke(
+        &path,
+        &gradient,
+        &StrokeStyle {
+            cap: LineCap::Butt,
+            join: LineJoin::Bevel,
+            width: 10.,
+            miter_limit: 2.,
+            dash_array: vec![10., 5.],
+            dash_offset: 3.,
+        },
+        &DrawOptions::new(),
+    );
+
+    let font = SystemSource::new()
+        .select_best_match(&[FamilyName::SansSerif], &Properties::new())
+        .unwrap()
+        .load()
+        .unwrap();
+
+    dt.draw_text(
+        &font,
+        24.,
+        "Hello",
+        Point::new(100., 250.),
+        &Source::Solid(SolidSource {
+            r: 0,
+            g: 0,
+            b: 0xff,
+            a: 0xff,
+        }),
+        &DrawOptions::new(),
+    );
+}