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fix: tiny-skia quad handle case where border_radius < border_width / 2.0

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This commit is contained in:
Ashley Wulber 2023-05-11 19:21:36 -04:00
parent 5ee26cc8ec
commit 102c78abd8
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GPG key ID: 5216D4F46A90A820
1 changed files with 83 additions and 7 deletions
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90
tiny_skia/src/backend.rs
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@ -1,3 +1,5 @@
use tiny_skia::{Mask, Pixmap, PixmapPaint};
use crate::core::text;
use crate::core::{Background, Color, Font, Point, Rectangle, Size, Vector};
use crate::graphics::backend;
@ -212,17 +214,29 @@ impl Backend {
height: bounds.height - border_width,
};
// Make sure the border radius is correct
let mut border_radius = *border_radius;
for radius in &mut border_radius {
*radius = radius
.min(path_bounds.width / 2.0)
.min(path_bounds.height / 2.0);
let mut border_radius_gt_half_border_width =
[true, true, true, true];
for (i, radius) in &mut border_radius.iter_mut().enumerate() {
*radius = if *radius == 0.0 {
// Path should handle this fine
0.0
} else if *radius > border_width / 2.0 {
*radius - border_width / 2.0
} else {
border_radius_gt_half_border_width[i] = false;
0.0
}
.min(path_bounds.width / 2.0)
.min(path_bounds.height / 2.0);
}
let border_radius_path =
rounded_rectangle(path_bounds, border_radius);
// Stroking a path works well in this case.
if border_radius_gt_half_border_width.iter().all(|b| *b) {
let border_radius_path =
rounded_rectangle(path_bounds, border_radius);
if border_width > 0.0 {
pixels.stroke_path(
&border_radius_path,
&tiny_skia::Paint {
@ -239,6 +253,68 @@ impl Backend {
transform,
clip_mask,
);
} else {
// Draw corners that have to small border radii as having no border radius,
// but mask them with the rounded rectangle with the correct border radius.
let mut temp_pixmap =
Pixmap::new(bounds.width as u32, bounds.height as u32)
.unwrap();
let mut quad_mask =
Mask::new(bounds.width as u32, bounds.height as u32)
.unwrap();
let zero_bounds = Rectangle {
x: 0.0,
y: 0.0,
width: bounds.width,
height: bounds.height,
};
let path =
rounded_rectangle(zero_bounds, fill_border_radius);
quad_mask.fill_path(
&path,
tiny_skia::FillRule::EvenOdd,
true,
transform,
);
let path_bounds = Rectangle {
x: border_width / 2.0,
y: border_width / 2.0,
width: bounds.width - border_width,
height: bounds.height - border_width,
};
let border_radius_path =
rounded_rectangle(path_bounds, border_radius);
temp_pixmap.stroke_path(
&border_radius_path,
&tiny_skia::Paint {
shader: tiny_skia::Shader::SolidColor(into_color(
*border_color,
)),
anti_alias: true,
..tiny_skia::Paint::default()
},
&tiny_skia::Stroke {
width: border_width,
..tiny_skia::Stroke::default()
},
transform,
Some(&quad_mask),
);
pixels.draw_pixmap(
bounds.x as i32,
bounds.y as i32,
temp_pixmap.as_ref(),
&PixmapPaint::default(),
transform,
clip_mask,
);
}
}
Primitive::Text {