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7fd0af8b63
Despite the blur being an abstract float, in reality in femtovg as well
as Skia it's a pixel radius. Commit
1a8a295e38 removed the scaling to physical
pixels, which was wrong. This restores it and along with it the same
appearance as before.
86 lines
2.7 KiB
Rust
86 lines
2.7 KiB
Rust
// Copyright © SixtyFPS GmbH <info@slint-ui.com>
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// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-commercial
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use std::{cell::RefCell, collections::BTreeMap};
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use i_slint_core::{items::ItemRc, Color};
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#[derive(Clone, PartialEq, Debug, Default)]
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pub struct BoxShadowOptions {
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pub width: f32,
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pub height: f32,
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pub color: Color,
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pub blur: f32,
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pub radius: f32,
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}
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impl Eq for BoxShadowOptions {}
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impl Ord for BoxShadowOptions {
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fn cmp(&self, other: &Self) -> std::cmp::Ordering {
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if (other.width, other.height, other.color, other.blur, other.radius)
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< (self.width, self.height, self.color, self.blur, self.radius)
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{
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std::cmp::Ordering::Less
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} else if (self.width, self.height, self.color, self.blur, self.radius)
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< (other.width, other.height, other.color, other.blur, other.radius)
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{
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std::cmp::Ordering::Greater
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} else {
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std::cmp::Ordering::Equal
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}
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}
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}
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impl PartialOrd for BoxShadowOptions {
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fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
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Some(self.cmp(other))
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}
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}
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impl BoxShadowOptions {
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fn new(
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box_shadow: std::pin::Pin<&i_slint_core::items::BoxShadow>,
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scale_factor: f32,
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) -> Option<Self> {
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let color = box_shadow.color();
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if color.alpha() == 0 {
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return None;
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}
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Some(Self {
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width: box_shadow.width() * scale_factor,
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height: box_shadow.height() * scale_factor,
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color,
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blur: box_shadow.blur() * scale_factor, // This effectively becomes the blur radius, so scale to physical pixels
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radius: box_shadow.border_radius() * scale_factor,
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})
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}
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}
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pub struct BoxShadowCache<ImageType>(RefCell<BTreeMap<BoxShadowOptions, ImageType>>);
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impl<ImageType> Default for BoxShadowCache<ImageType> {
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fn default() -> Self {
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Self(Default::default())
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}
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}
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impl<ImageType: Clone> BoxShadowCache<ImageType> {
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pub fn get_box_shadow(
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&self,
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item_rc: &ItemRc,
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item_cache: &i_slint_core::item_rendering::ItemCache<Option<ImageType>>,
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box_shadow: std::pin::Pin<&i_slint_core::items::BoxShadow>,
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scale_factor: f32,
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shadow_render_fn: impl FnOnce(&BoxShadowOptions) -> ImageType,
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) -> Option<ImageType> {
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item_cache.get_or_update_cache_entry(item_rc, || {
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let shadow_options = BoxShadowOptions::new(box_shadow, scale_factor)?;
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self.0
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.borrow_mut()
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.entry(shadow_options.clone())
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.or_insert_with(|| shadow_render_fn(&shadow_options))
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.clone()
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.into()
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})
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}
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}
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