mirror of
https://github.com/slint-ui/slint.git
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1394 lines
50 KiB
Rust
1394 lines
50 KiB
Rust
/* LICENSE BEGIN
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This file is part of the SixtyFPS Project -- https://sixtyfps.io
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Copyright (c) 2020 Olivier Goffart <olivier.goffart@sixtyfps.io>
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Copyright (c) 2020 Simon Hausmann <simon.hausmann@sixtyfps.io>
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SPDX-License-Identifier: GPL-3.0-only
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This file is also available under commercial licensing terms.
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Please contact info@sixtyfps.io for more information.
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LICENSE END */
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use std::{
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cell::RefCell,
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collections::HashMap,
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rc::{Rc, Weak},
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};
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use sixtyfps_corelib::graphics::{
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Color, FontMetrics, FontRequest, Point, Rect, RenderingCache, Resource, Size,
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};
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use sixtyfps_corelib::item_rendering::{CachedRenderingData, ItemRenderer};
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use sixtyfps_corelib::items::{
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ImageFit, Item, TextHorizontalAlignment, TextOverflow, TextVerticalAlignment, TextWrap,
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};
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use sixtyfps_corelib::properties::Property;
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use sixtyfps_corelib::window::ComponentWindow;
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use sixtyfps_corelib::SharedString;
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mod graphics_window;
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use graphics_window::*;
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pub(crate) mod eventloop;
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mod svg;
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type CanvasRc = Rc<RefCell<femtovg::Canvas<femtovg::renderer::OpenGl>>>;
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pub const DEFAULT_FONT_SIZE: f32 = 12.;
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pub const DEFAULT_FONT_WEIGHT: i32 = 400; // CSS normal
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enum ImageData {
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GPUSide {
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id: femtovg::ImageId,
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canvas: CanvasRc,
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/// If present, this boolean property indicates whether the image has been uploaded yet or
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/// if that operation is still pending. If not present, then the image *is* available. This is
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/// used for remote HTML image loading and the property will be used to correctly track dependencies
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/// to graphics items that query for the size.
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upload_pending: Option<core::pin::Pin<Box<Property<bool>>>>,
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},
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CPUSide {
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decoded_image: image::DynamicImage,
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},
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}
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impl Drop for ImageData {
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fn drop(&mut self) {
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match self {
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ImageData::GPUSide { id, canvas, .. } => {
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canvas.borrow_mut().delete_image(*id);
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}
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ImageData::CPUSide { .. } => {}
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}
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}
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}
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struct CachedImage(RefCell<ImageData>);
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impl CachedImage {
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fn new_on_cpu(decoded_image: image::DynamicImage) -> Self {
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Self(RefCell::new(ImageData::CPUSide { decoded_image }))
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}
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fn new_on_gpu(
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canvas: &CanvasRc,
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image_id: femtovg::ImageId,
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upload_pending_notifier: Option<core::pin::Pin<Box<Property<bool>>>>,
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) -> Self {
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Self(RefCell::new(ImageData::GPUSide {
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id: image_id,
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canvas: canvas.clone(),
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upload_pending: upload_pending_notifier,
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}))
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}
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// Upload the image to the GPU? if that hasn't happened yet. This function could take just a canvas
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// as parameter, but since an upload requires a current context, this is "enforced" by taking
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// a renderer instead (which implies a current context).
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fn ensure_uploaded_to_gpu(&self, current_renderer: &GLItemRenderer) -> femtovg::ImageId {
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use std::convert::TryFrom;
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let canvas = ¤t_renderer.shared_data.canvas;
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let img = &mut *self.0.borrow_mut();
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if let ImageData::CPUSide { decoded_image } = img {
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let image_id = match femtovg::ImageSource::try_from(&*decoded_image) {
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Ok(image_source) => {
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canvas.borrow_mut().create_image(image_source, femtovg::ImageFlags::empty())
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}
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Err(_) => {
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let converted = image::DynamicImage::ImageRgba8(decoded_image.to_rgba8());
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let image_source = femtovg::ImageSource::try_from(&converted).unwrap();
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canvas.borrow_mut().create_image(image_source, femtovg::ImageFlags::empty())
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}
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}
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.unwrap();
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*img = ImageData::GPUSide { id: image_id, canvas: canvas.clone(), upload_pending: None }
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};
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match &img {
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ImageData::GPUSide { id, .. } => *id,
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_ => unreachable!(),
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}
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}
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fn size(&self) -> Size {
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use image::GenericImageView;
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match &*self.0.borrow() {
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ImageData::GPUSide { id, canvas, upload_pending } => {
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if upload_pending
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.as_ref()
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.map_or(false, |pending_property| pending_property.as_ref().get())
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{
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Ok((1., 1.))
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} else {
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canvas
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.borrow()
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.image_info(*id)
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.map(|info| (info.width() as f32, info.height() as f32))
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}
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}
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ImageData::CPUSide { decoded_image: data } => {
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let (width, height) = data.dimensions();
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Ok((width as f32, height as f32))
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}
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}
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.map(|(width, height)| euclid::size2(width, height))
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.unwrap_or_default()
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}
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#[cfg(target_arch = "wasm32")]
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fn notify_loaded(&self) {
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if let ImageData::GPUSide { upload_pending, .. } = &*self.0.borrow() {
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upload_pending.as_ref().map(|pending_property| {
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pending_property.as_ref().set(false);
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});
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}
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}
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}
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#[derive(PartialEq, Eq, Hash, Debug)]
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enum ImageCacheKey {
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Path(String),
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EmbeddedData(by_address::ByAddress<&'static [u8]>),
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}
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#[derive(Clone)]
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enum ItemGraphicsCacheEntry {
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Image(Rc<CachedImage>),
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}
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impl ItemGraphicsCacheEntry {
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fn as_image(&self) -> &Rc<CachedImage> {
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match self {
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ItemGraphicsCacheEntry::Image(image) => image,
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//_ => panic!("internal error. image requested for non-image gpu data"),
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}
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}
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}
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struct FontCache(HashMap<FontCacheKey, femtovg::FontId>);
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impl Default for FontCache {
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fn default() -> Self {
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Self(HashMap::new())
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}
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}
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mod fonts;
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pub use fonts::register_application_font_from_memory;
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use fonts::*;
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impl FontCache {
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fn load_single_font(&mut self, canvas: &CanvasRc, request: &FontRequest) -> femtovg::FontId {
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self.0
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.entry(FontCacheKey { family: request.family.clone(), weight: request.weight.unwrap() })
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.or_insert_with(|| {
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try_load_app_font(canvas, &request)
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.unwrap_or_else(|| load_system_font(canvas, &request))
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})
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.clone()
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}
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fn font(&mut self, canvas: &CanvasRc, mut request: FontRequest, scale_factor: f32) -> GLFont {
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request.pixel_size = request.pixel_size.or(Some(DEFAULT_FONT_SIZE * scale_factor));
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request.weight = request.weight.or(Some(DEFAULT_FONT_WEIGHT));
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let primary_font = self.load_single_font(canvas, &request);
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let fallbacks = font_fallbacks_for_request(&request);
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let fonts = core::iter::once(primary_font)
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.chain(
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fallbacks
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.iter()
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.map(|fallback_request| self.load_single_font(canvas, &fallback_request)),
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)
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.collect::<Vec<_>>();
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GLFont { fonts, canvas: canvas.clone(), pixel_size: request.pixel_size.unwrap() }
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}
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}
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// glutin's WindowedContext tries to enforce being current or not. Since we need the WindowedContext's window() function
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// in the GL renderer regardless whether we're current or not, we wrap the two states back into one type.
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#[cfg(not(target_arch = "wasm32"))]
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enum WindowedContextWrapper {
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NotCurrent(glutin::WindowedContext<glutin::NotCurrent>),
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Current(glutin::WindowedContext<glutin::PossiblyCurrent>),
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}
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#[cfg(not(target_arch = "wasm32"))]
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impl WindowedContextWrapper {
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fn window(&self) -> &winit::window::Window {
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match self {
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Self::NotCurrent(context) => context.window(),
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Self::Current(context) => context.window(),
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}
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}
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fn make_current(self) -> Self {
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match self {
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Self::NotCurrent(not_current_ctx) => {
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let current_ctx = unsafe { not_current_ctx.make_current().unwrap() };
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Self::Current(current_ctx)
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}
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this @ Self::Current(_) => this,
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}
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}
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fn make_not_current(self) -> Self {
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match self {
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this @ Self::NotCurrent(_) => this,
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Self::Current(current_ctx_rc) => {
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Self::NotCurrent(unsafe { current_ctx_rc.make_not_current().unwrap() })
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}
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}
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}
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fn swap_buffers(&mut self) {
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match self {
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WindowedContextWrapper::NotCurrent(_) => {}
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WindowedContextWrapper::Current(current_ctx) => {
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current_ctx.swap_buffers().unwrap();
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}
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}
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}
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}
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struct GLRendererData {
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canvas: CanvasRc,
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#[cfg(target_arch = "wasm32")]
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window: Rc<winit::window::Window>,
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#[cfg(not(target_arch = "wasm32"))]
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windowed_context: RefCell<Option<WindowedContextWrapper>>,
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#[cfg(target_arch = "wasm32")]
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event_loop_proxy: Rc<winit::event_loop::EventLoopProxy<eventloop::CustomEvent>>,
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item_graphics_cache: RefCell<RenderingCache<Option<ItemGraphicsCacheEntry>>>,
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// Cache used to avoid repeatedly decoding images from disk. The weak references are
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// drained after flushing the renderer commands to the screen.
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image_cache: RefCell<HashMap<ImageCacheKey, Weak<CachedImage>>>,
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loaded_fonts: RefCell<FontCache>,
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}
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impl GLRendererData {
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#[cfg(target_arch = "wasm32")]
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fn load_html_image(&self, url: &str) -> Rc<CachedImage> {
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let image_id = self
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.canvas
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.borrow_mut()
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.create_image_empty(1, 1, femtovg::PixelFormat::Rgba8, femtovg::ImageFlags::empty())
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.unwrap();
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let cached_image = Rc::new(CachedImage::new_on_gpu(
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&self.canvas,
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image_id,
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Some(Box::pin(/*upload pending*/ Property::new(true))),
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));
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let html_image = web_sys::HtmlImageElement::new().unwrap();
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html_image.set_cross_origin(Some("anonymous"));
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html_image.set_onload(Some(
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&wasm_bindgen::closure::Closure::once_into_js({
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let canvas_weak = Rc::downgrade(&self.canvas);
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let html_image = html_image.clone();
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let image_id = image_id.clone();
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let window_weak = Rc::downgrade(&self.window);
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let cached_image_weak = Rc::downgrade(&cached_image);
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let event_loop_proxy_weak = Rc::downgrade(&self.event_loop_proxy);
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move || {
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let (canvas, window, event_loop_proxy, cached_image) = match (
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canvas_weak.upgrade(),
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window_weak.upgrade(),
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event_loop_proxy_weak.upgrade(),
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cached_image_weak.upgrade(),
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) {
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(
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Some(canvas),
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Some(window),
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Some(event_loop_proxy),
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Some(cached_image),
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) => (canvas, window, event_loop_proxy, cached_image),
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_ => return,
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};
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canvas
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.borrow_mut()
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.realloc_image(
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image_id,
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html_image.width() as usize,
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html_image.height() as usize,
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femtovg::PixelFormat::Rgba8,
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femtovg::ImageFlags::empty(),
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)
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.unwrap();
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canvas.borrow_mut().update_image(image_id, &html_image.into(), 0, 0).unwrap();
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cached_image.notify_loaded();
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// As you can paint on a HTML canvas at any point in time, request_redraw()
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// on a winit window only queues an additional internal event, that'll be
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// be dispatched as the next event. We are however not in an event loop
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// call, so we also need to wake up the event loop.
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window.request_redraw();
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event_loop_proxy.send_event(crate::eventloop::CustomEvent::WakeUpAndPoll).ok();
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}
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})
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.into(),
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));
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html_image.set_src(&url);
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cached_image
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}
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// Look up the given image cache key in the image cache and upgrade the weak reference to a strong one if found,
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// otherwise a new image is created/loaded from the given callback.
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fn lookup_image_in_cache_or_create(
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&self,
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cache_key: ImageCacheKey,
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image_create_fn: impl Fn() -> Rc<CachedImage>,
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) -> Rc<CachedImage> {
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match self.image_cache.borrow_mut().entry(cache_key) {
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std::collections::hash_map::Entry::Occupied(mut existing_entry) => {
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existing_entry.get().upgrade().unwrap_or_else(|| {
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let new_image = image_create_fn();
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existing_entry.insert(Rc::downgrade(&new_image));
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new_image
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})
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}
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std::collections::hash_map::Entry::Vacant(vacant_entry) => {
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let new_image = image_create_fn();
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vacant_entry.insert(Rc::downgrade(&new_image));
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new_image
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}
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}
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}
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// Try to load the image the given resource points to
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fn load_image_resource(&self, resource: Resource) -> Option<ItemGraphicsCacheEntry> {
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Some(ItemGraphicsCacheEntry::Image(match resource {
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Resource::None => return None,
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Resource::AbsoluteFilePath(path) => {
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self.lookup_image_in_cache_or_create(ImageCacheKey::Path(path.to_string()), || {
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#[cfg(not(target_arch = "wasm32"))]
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{
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#[cfg(feature = "svg")]
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if path.ends_with(".svg") {
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return Rc::new(CachedImage::new_on_cpu(
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svg::load_from_path(std::path::Path::new(&path.as_str())).unwrap(),
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));
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}
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Rc::new(CachedImage::new_on_cpu(
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image::open(std::path::Path::new(&path.as_str())).unwrap(),
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))
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}
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#[cfg(target_arch = "wasm32")]
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self.load_html_image(&path)
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})
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}
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Resource::EmbeddedData(data) => self.lookup_image_in_cache_or_create(
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ImageCacheKey::EmbeddedData(by_address::ByAddress(data.as_slice())),
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|| {
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#[cfg(feature = "svg")]
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if data.starts_with(b"<svg") {
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return Rc::new(CachedImage::new_on_cpu(
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svg::load_from_data(data.as_slice()).unwrap(),
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));
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}
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Rc::new(CachedImage::new_on_cpu(
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image::load_from_memory(data.as_slice()).unwrap(),
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))
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},
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),
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Resource::EmbeddedRgbaImage { .. } => todo!(),
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}))
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}
|
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|
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// Load the image from the specified Resource property (via getter fn), unless it was cached in the item's rendering
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// cache.
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fn load_cached_item_image(
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&self,
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item_cache: &CachedRenderingData,
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source_property_getter: impl FnOnce() -> Resource,
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) -> Option<Rc<CachedImage>> {
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let mut cache = self.item_graphics_cache.borrow_mut();
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item_cache
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.ensure_up_to_date(&mut cache, || self.load_image_resource(source_property_getter()))
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.map(|gpu_resource| {
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let image = gpu_resource.as_image();
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image.clone()
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})
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}
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}
|
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|
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pub struct GLRenderer {
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shared_data: Rc<GLRendererData>,
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}
|
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|
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impl GLRenderer {
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pub(crate) fn new(
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event_loop: &dyn crate::eventloop::EventLoopInterface,
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window_builder: winit::window::WindowBuilder,
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#[cfg(target_arch = "wasm32")] canvas_id: &str,
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) -> GLRenderer {
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#[cfg(not(target_arch = "wasm32"))]
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let (windowed_context, renderer) = {
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let windowed_context = glutin::ContextBuilder::new()
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.with_vsync(true)
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.build_windowed(window_builder, event_loop.event_loop_target())
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.unwrap();
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let windowed_context = unsafe { windowed_context.make_current().unwrap() };
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let renderer = femtovg::renderer::OpenGl::new(|symbol| {
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windowed_context.get_proc_address(symbol) as *const _
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})
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.unwrap();
|
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|
|
#[cfg(target_os = "macos")]
|
|
{
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|
use cocoa::appkit::NSView;
|
|
use winit::platform::macos::WindowExtMacOS;
|
|
let ns_view = windowed_context.window().ns_view();
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|
let view_id: cocoa::base::id = ns_view as *const _ as *mut _;
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unsafe {
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NSView::setLayerContentsPlacement(view_id, cocoa::appkit::NSViewLayerContentsPlacement::NSViewLayerContentsPlacementTopLeft)
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|
}
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|
}
|
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|
|
(windowed_context, renderer)
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|
};
|
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|
|
#[cfg(target_arch = "wasm32")]
|
|
let event_loop_proxy = Rc::new(event_loop.event_loop_proxy().clone());
|
|
|
|
#[cfg(target_arch = "wasm32")]
|
|
let (window, renderer) = {
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|
use wasm_bindgen::JsCast;
|
|
|
|
let canvas = web_sys::window()
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.unwrap()
|
|
.document()
|
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.unwrap()
|
|
.get_element_by_id(canvas_id)
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.unwrap()
|
|
.dyn_into::<web_sys::HtmlCanvasElement>()
|
|
.unwrap();
|
|
|
|
use winit::platform::web::WindowBuilderExtWebSys;
|
|
use winit::platform::web::WindowExtWebSys;
|
|
|
|
let existing_canvas_size = winit::dpi::LogicalSize::new(
|
|
canvas.client_width() as u32,
|
|
canvas.client_height() as u32,
|
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);
|
|
|
|
let window = Rc::new(
|
|
window_builder
|
|
.with_canvas(Some(canvas))
|
|
.build(&event_loop.event_loop_target())
|
|
.unwrap(),
|
|
);
|
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|
|
// Try to maintain the existing size of the canvas element. A window created with winit
|
|
// on the web will always have 1024x768 as size otherwise.
|
|
|
|
let resize_canvas = {
|
|
let event_loop_proxy = event_loop_proxy.clone();
|
|
let canvas = web_sys::window()
|
|
.unwrap()
|
|
.document()
|
|
.unwrap()
|
|
.get_element_by_id(canvas_id)
|
|
.unwrap()
|
|
.dyn_into::<web_sys::HtmlCanvasElement>()
|
|
.unwrap();
|
|
let window = window.clone();
|
|
move |_: web_sys::Event| {
|
|
let existing_canvas_size = winit::dpi::LogicalSize::new(
|
|
canvas.client_width() as u32,
|
|
canvas.client_height() as u32,
|
|
);
|
|
|
|
window.set_inner_size(existing_canvas_size);
|
|
window.request_redraw();
|
|
event_loop_proxy.send_event(eventloop::CustomEvent::WakeUpAndPoll).ok();
|
|
}
|
|
};
|
|
|
|
let resize_closure =
|
|
wasm_bindgen::closure::Closure::wrap(Box::new(resize_canvas) as Box<dyn FnMut(_)>);
|
|
web_sys::window()
|
|
.unwrap()
|
|
.add_event_listener_with_callback("resize", resize_closure.as_ref().unchecked_ref())
|
|
.unwrap();
|
|
resize_closure.forget();
|
|
|
|
{
|
|
let default_size = window.inner_size().to_logical(window.scale_factor());
|
|
let new_size = winit::dpi::LogicalSize::new(
|
|
if existing_canvas_size.width > 0 {
|
|
existing_canvas_size.width
|
|
} else {
|
|
default_size.width
|
|
},
|
|
if existing_canvas_size.height > 0 {
|
|
existing_canvas_size.height
|
|
} else {
|
|
default_size.height
|
|
},
|
|
);
|
|
if new_size != default_size {
|
|
window.set_inner_size(new_size);
|
|
}
|
|
}
|
|
|
|
let renderer =
|
|
femtovg::renderer::OpenGl::new_from_html_canvas(&window.canvas()).unwrap();
|
|
(window, renderer)
|
|
};
|
|
|
|
let canvas = femtovg::Canvas::new(renderer).unwrap();
|
|
|
|
let shared_data = GLRendererData {
|
|
canvas: Rc::new(RefCell::new(canvas)),
|
|
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
windowed_context: RefCell::new(Some(WindowedContextWrapper::NotCurrent(unsafe {
|
|
windowed_context.make_not_current().unwrap()
|
|
}))),
|
|
#[cfg(target_arch = "wasm32")]
|
|
window,
|
|
#[cfg(target_arch = "wasm32")]
|
|
event_loop_proxy,
|
|
|
|
item_graphics_cache: Default::default(),
|
|
image_cache: Default::default(),
|
|
loaded_fonts: Default::default(),
|
|
};
|
|
|
|
GLRenderer { shared_data: Rc::new(shared_data) }
|
|
}
|
|
|
|
/// Returns a new item renderer instance. At this point rendering begins and the backend ensures that the
|
|
/// window background was cleared with the specified clear_color.
|
|
fn new_renderer(&mut self, clear_color: &Color, scale_factor: f32) -> GLItemRenderer {
|
|
let size = self.window().inner_size();
|
|
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
{
|
|
let ctx = &mut *self.shared_data.windowed_context.borrow_mut();
|
|
*ctx = ctx.take().unwrap().make_current().into();
|
|
}
|
|
|
|
{
|
|
let mut canvas = self.shared_data.canvas.borrow_mut();
|
|
// We pass 1.0 as dpi / device pixel ratio as femtovg only uses this factor to scale
|
|
// text metrics. Since we do the entire translation from logical pixels to physical
|
|
// pixels on our end, we don't need femtovg to scale a second time.
|
|
canvas.set_size(size.width, size.height, 1.0);
|
|
canvas.clear_rect(0, 0, size.width, size.height, clear_color.into());
|
|
}
|
|
|
|
GLItemRenderer { shared_data: self.shared_data.clone(), scale_factor }
|
|
}
|
|
|
|
/// Complete the item rendering by calling this function. This will typically flush any remaining/pending
|
|
/// commands to the underlying graphics subsystem.
|
|
fn flush_renderer(&mut self, _renderer: GLItemRenderer) {
|
|
self.shared_data.canvas.borrow_mut().flush();
|
|
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
{
|
|
let mut ctx = self.shared_data.windowed_context.borrow_mut().take().unwrap();
|
|
ctx.swap_buffers();
|
|
|
|
*self.shared_data.windowed_context.borrow_mut() = ctx.make_not_current().into();
|
|
}
|
|
|
|
self.shared_data.image_cache.borrow_mut().retain(|_, cached_image_weak| {
|
|
cached_image_weak
|
|
.upgrade()
|
|
.map_or(false, |cached_image_rc| Rc::strong_count(&cached_image_rc) > 1)
|
|
});
|
|
}
|
|
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
fn window(&self) -> std::cell::Ref<winit::window::Window> {
|
|
std::cell::Ref::map(self.shared_data.windowed_context.borrow(), |ctx| {
|
|
ctx.as_ref().unwrap().window()
|
|
})
|
|
}
|
|
|
|
#[cfg(target_arch = "wasm32")]
|
|
fn window(&self) -> &winit::window::Window {
|
|
return &self.shared_data.window;
|
|
}
|
|
|
|
/// Returns a FontMetrics trait object that can be used to measure text and that matches the given font request as
|
|
/// closely as possible.
|
|
fn font_metrics(&mut self, request: FontRequest, scale_factor: f32) -> Box<dyn FontMetrics> {
|
|
Box::new(GLFontMetrics { request, scale_factor, shared_data: self.shared_data.clone() })
|
|
}
|
|
|
|
/// Returns the size of image referenced by the specified resource. These are image pixels, not adjusted
|
|
/// to the window scale factor.
|
|
fn image_size(
|
|
&self,
|
|
item_graphics_cache: &sixtyfps_corelib::item_rendering::CachedRenderingData,
|
|
source: core::pin::Pin<&sixtyfps_corelib::properties::Property<Resource>>,
|
|
) -> sixtyfps_corelib::graphics::Size {
|
|
self.shared_data
|
|
.load_cached_item_image(item_graphics_cache, || source.get())
|
|
.map(|image| image.size())
|
|
.unwrap_or_default()
|
|
}
|
|
}
|
|
|
|
pub struct GLItemRenderer {
|
|
shared_data: Rc<GLRendererData>,
|
|
scale_factor: f32,
|
|
}
|
|
|
|
fn rect_to_path(r: Rect) -> femtovg::Path {
|
|
let mut path = femtovg::Path::new();
|
|
path.rect(r.min_x(), r.min_y(), r.width(), r.height());
|
|
path
|
|
}
|
|
|
|
impl ItemRenderer for GLItemRenderer {
|
|
fn draw_rectangle(
|
|
&mut self,
|
|
pos: Point,
|
|
rect: std::pin::Pin<&sixtyfps_corelib::items::Rectangle>,
|
|
) {
|
|
let geometry = rect.geometry();
|
|
if geometry.is_empty() {
|
|
return;
|
|
}
|
|
// TODO: cache path in item to avoid re-tesselation
|
|
let mut path = rect_to_path(geometry);
|
|
let paint = femtovg::Paint::color(rect.color().into());
|
|
self.shared_data.canvas.borrow_mut().save_with(|canvas| {
|
|
canvas.translate(pos.x, pos.y);
|
|
canvas.fill_path(&mut path, paint)
|
|
})
|
|
}
|
|
|
|
fn draw_border_rectangle(
|
|
&mut self,
|
|
pos: Point,
|
|
rect: std::pin::Pin<&sixtyfps_corelib::items::BorderRectangle>,
|
|
) {
|
|
let geometry = rect.geometry();
|
|
if geometry.is_empty() {
|
|
return;
|
|
}
|
|
|
|
// If the border width exceeds the width, just fill the rectangle.
|
|
let border_width = rect.border_width().min(rect.width() / 2.);
|
|
// In CSS the border is entirely towards the inside of the boundary
|
|
// geometry, while in femtovg the line with for a stroke is 50% in-
|
|
// and 50% outwards. We choose the CSS model, so the inner rectangle
|
|
// is adjusted accordingly.
|
|
let mut path = femtovg::Path::new();
|
|
let border_radius = rect.border_radius();
|
|
let x = geometry.min_x() + border_width / 2.;
|
|
let y = geometry.min_y() + border_width / 2.;
|
|
let width = geometry.width() - border_width;
|
|
let height = geometry.height() - border_width;
|
|
// If we're drawing a circle, use directly connected bezier curves instead of
|
|
// ones with intermediate LineTo verbs, as `rounded_rect` creates, to avoid
|
|
// rendering artifacts due to those edges.
|
|
if width == height && border_radius * 2. == width {
|
|
path.circle(x + border_radius, y + border_radius, border_radius);
|
|
} else {
|
|
path.rounded_rect(x, y, width, height, border_radius);
|
|
}
|
|
|
|
let fill_paint = femtovg::Paint::color(rect.color().into());
|
|
|
|
let mut border_paint = femtovg::Paint::color(rect.border_color().into());
|
|
border_paint.set_line_width(border_width);
|
|
|
|
self.shared_data.canvas.borrow_mut().save_with(|canvas| {
|
|
canvas.translate(pos.x, pos.y);
|
|
canvas.fill_path(&mut path, fill_paint);
|
|
canvas.stroke_path(&mut path, border_paint);
|
|
})
|
|
}
|
|
|
|
fn draw_image(&mut self, pos: Point, image: std::pin::Pin<&sixtyfps_corelib::items::Image>) {
|
|
self.draw_image_impl(
|
|
pos + euclid::Vector2D::new(image.x(), image.y()),
|
|
&image.cached_rendering_data,
|
|
sixtyfps_corelib::items::Image::FIELD_OFFSETS.source.apply_pin(image),
|
|
Rect::default(),
|
|
image.width(),
|
|
image.height(),
|
|
image.image_fit(),
|
|
);
|
|
}
|
|
|
|
fn draw_clipped_image(
|
|
&mut self,
|
|
pos: Point,
|
|
clipped_image: std::pin::Pin<&sixtyfps_corelib::items::ClippedImage>,
|
|
) {
|
|
let source_clip_rect = Rect::new(
|
|
[clipped_image.source_clip_x() as _, clipped_image.source_clip_y() as _].into(),
|
|
[clipped_image.source_clip_width() as _, clipped_image.source_clip_height() as _]
|
|
.into(),
|
|
);
|
|
|
|
self.draw_image_impl(
|
|
pos + euclid::Vector2D::new(clipped_image.x(), clipped_image.y()),
|
|
&clipped_image.cached_rendering_data,
|
|
sixtyfps_corelib::items::ClippedImage::FIELD_OFFSETS.source.apply_pin(clipped_image),
|
|
source_clip_rect,
|
|
clipped_image.width(),
|
|
clipped_image.height(),
|
|
clipped_image.image_fit(),
|
|
);
|
|
}
|
|
|
|
fn draw_text(&mut self, pos: Point, text: std::pin::Pin<&sixtyfps_corelib::items::Text>) {
|
|
let pos = pos + euclid::Vector2D::new(text.x(), text.y());
|
|
let max_width = text.width();
|
|
let max_height = text.height();
|
|
|
|
if max_width <= 0. || max_height <= 0. {
|
|
return;
|
|
}
|
|
|
|
let string = text.text();
|
|
let string = string.as_str();
|
|
let vertical_alignment = text.vertical_alignment();
|
|
let horizontal_alignment = text.horizontal_alignment();
|
|
let font = self.shared_data.loaded_fonts.borrow_mut().font(
|
|
&self.shared_data.canvas,
|
|
text.font_request(),
|
|
self.scale_factor,
|
|
);
|
|
let wrap = text.wrap() == TextWrap::word_wrap;
|
|
let text_size = font.text_size(string, if wrap { Some(max_width) } else { None });
|
|
let mut paint = font.paint();
|
|
paint.set_color(text.color().into());
|
|
|
|
let mut canvas = self.shared_data.canvas.borrow_mut();
|
|
|
|
let font_metrics = canvas.measure_font(paint).unwrap();
|
|
|
|
let mut y = pos.y
|
|
+ match vertical_alignment {
|
|
TextVerticalAlignment::top => 0.,
|
|
TextVerticalAlignment::center => max_height / 2. - text_size.height / 2.,
|
|
TextVerticalAlignment::bottom => max_height - text_size.height,
|
|
};
|
|
|
|
let mut draw_line = |canvas: &mut femtovg::Canvas<_>, to_draw: &str| {
|
|
let text_metrics = canvas.measure_text(0., 0., to_draw, paint).unwrap();
|
|
let translate_x = match horizontal_alignment {
|
|
TextHorizontalAlignment::left => 0.,
|
|
TextHorizontalAlignment::center => max_width / 2. - text_metrics.width() / 2.,
|
|
TextHorizontalAlignment::right => max_width - text_metrics.width(),
|
|
};
|
|
canvas.fill_text(pos.x + translate_x, y, to_draw, paint).unwrap();
|
|
y += font_metrics.height();
|
|
};
|
|
|
|
if wrap {
|
|
let mut start = 0;
|
|
while start < string.len() {
|
|
let index = canvas.break_text(max_width, &string[start..], paint).unwrap();
|
|
if index == 0 {
|
|
// FIXME the word is too big to be shown, but we should still break, ideally
|
|
break;
|
|
}
|
|
let index = start + index;
|
|
// trim is there to remove the \n
|
|
draw_line(&mut canvas, string[start..index].trim());
|
|
start = index;
|
|
}
|
|
} else {
|
|
let elide = text.overflow() == TextOverflow::elide;
|
|
'lines: for line in string.lines() {
|
|
let text_metrics = canvas.measure_text(0., 0., line, paint).unwrap();
|
|
if text_metrics.width() > max_width {
|
|
let w = max_width
|
|
- if elide {
|
|
canvas.measure_text(0., 0., "…", paint).unwrap().width()
|
|
} else {
|
|
0.
|
|
};
|
|
let mut current_x = 0.;
|
|
for glyph in text_metrics.glyphs {
|
|
current_x += glyph.advance_x;
|
|
if current_x >= w {
|
|
let txt = &line[..glyph.byte_index];
|
|
if elide {
|
|
let elided = format!("{}…", txt);
|
|
draw_line(&mut canvas, &elided);
|
|
} else {
|
|
draw_line(&mut canvas, txt);
|
|
}
|
|
continue 'lines;
|
|
}
|
|
}
|
|
}
|
|
draw_line(&mut canvas, line);
|
|
}
|
|
}
|
|
}
|
|
|
|
fn draw_text_input(
|
|
&mut self,
|
|
pos: Point,
|
|
text_input: std::pin::Pin<&sixtyfps_corelib::items::TextInput>,
|
|
) {
|
|
let width = text_input.width();
|
|
let height = text_input.height();
|
|
if width <= 0. || height <= 0. {
|
|
return;
|
|
}
|
|
|
|
let pos = pos + euclid::Vector2D::new(text_input.x(), text_input.y());
|
|
let font = self.shared_data.loaded_fonts.borrow_mut().font(
|
|
&self.shared_data.canvas,
|
|
text_input.font_request(),
|
|
self.scale_factor,
|
|
);
|
|
|
|
let metrics = self.draw_text_impl(
|
|
pos,
|
|
width,
|
|
height,
|
|
&text_input.text(),
|
|
text_input.font_request(),
|
|
text_input.color(),
|
|
text_input.horizontal_alignment(),
|
|
text_input.vertical_alignment(),
|
|
);
|
|
|
|
// This way of drawing selected text isn't quite 100% correct. Due to femtovg only being able to
|
|
// have a simple rectangular selection - due to the use of the scissor clip - the selected text is
|
|
// drawn *over* the unselected text. If the selection background color is transparent, then that means
|
|
// that glyphs are blended twice, which may lead to artifacts.
|
|
// It would be better to draw the selected text and non-selected text without overlap.
|
|
if text_input.has_selection() {
|
|
let (anchor_pos, cursor_pos) = text_input.selection_anchor_and_cursor();
|
|
let mut selection_start_x = 0.;
|
|
let mut selection_end_x = 0.;
|
|
for glyph in &metrics.glyphs {
|
|
if glyph.byte_index == anchor_pos {
|
|
selection_start_x = glyph.x;
|
|
}
|
|
if glyph.byte_index == (cursor_pos as i32 - 1).max(0) as usize {
|
|
selection_end_x = glyph.x + glyph.advance_x;
|
|
}
|
|
}
|
|
|
|
let selection_rect = Rect::new(
|
|
[selection_start_x, pos.y].into(),
|
|
[selection_end_x - selection_start_x, font.height()].into(),
|
|
);
|
|
|
|
{
|
|
let mut canvas = self.shared_data.canvas.borrow_mut();
|
|
canvas.fill_path(
|
|
&mut rect_to_path(selection_rect),
|
|
femtovg::Paint::color(text_input.selection_background_color().into()),
|
|
);
|
|
|
|
canvas.save();
|
|
canvas.intersect_scissor(
|
|
selection_rect.min_x(),
|
|
selection_rect.min_y(),
|
|
selection_rect.width(),
|
|
selection_rect.height(),
|
|
);
|
|
}
|
|
|
|
self.draw_text_impl(
|
|
pos,
|
|
text_input.width(),
|
|
text_input.height(),
|
|
&text_input.text(),
|
|
text_input.font_request(),
|
|
text_input.selection_foreground_color().into(),
|
|
text_input.horizontal_alignment(),
|
|
text_input.vertical_alignment(),
|
|
);
|
|
|
|
self.shared_data.canvas.borrow_mut().restore();
|
|
};
|
|
|
|
let cursor_index = text_input.cursor_position();
|
|
if cursor_index >= 0 && text_input.cursor_visible() {
|
|
let cursor_x = metrics
|
|
.glyphs
|
|
.iter()
|
|
.find_map(|glyph| {
|
|
if glyph.byte_index == cursor_index as usize {
|
|
Some(glyph.x)
|
|
} else {
|
|
None
|
|
}
|
|
})
|
|
.unwrap_or_else(|| pos.x + metrics.width());
|
|
let mut cursor_rect = femtovg::Path::new();
|
|
cursor_rect.rect(
|
|
cursor_x,
|
|
pos.y,
|
|
text_input.text_cursor_width() * self.scale_factor,
|
|
font.height(),
|
|
);
|
|
self.shared_data
|
|
.canvas
|
|
.borrow_mut()
|
|
.fill_path(&mut cursor_rect, femtovg::Paint::color(text_input.color().into()));
|
|
}
|
|
}
|
|
|
|
fn draw_path(&mut self, pos: Point, path: std::pin::Pin<&sixtyfps_corelib::items::Path>) {
|
|
let elements = path.elements();
|
|
if matches!(elements, sixtyfps_corelib::PathData::None) {
|
|
return;
|
|
}
|
|
let mut fpath = femtovg::Path::new();
|
|
for x in elements.iter_fitted(path.width(), path.height()).iter() {
|
|
match x {
|
|
lyon_path::Event::Begin { at } => {
|
|
fpath.move_to(at.x, at.y);
|
|
}
|
|
lyon_path::Event::Line { from: _, to } => {
|
|
fpath.line_to(to.x, to.y);
|
|
}
|
|
lyon_path::Event::Quadratic { from: _, ctrl, to } => {
|
|
fpath.quad_to(ctrl.x, ctrl.y, to.x, to.y);
|
|
}
|
|
|
|
lyon_path::Event::Cubic { from: _, ctrl1, ctrl2, to } => {
|
|
fpath.bezier_to(ctrl1.x, ctrl1.y, ctrl2.x, ctrl2.y, to.x, to.y);
|
|
}
|
|
lyon_path::Event::End { last: _, first: _, close } => {
|
|
if close {
|
|
fpath.close()
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
let fill_paint = femtovg::Paint::color(path.fill_color().into());
|
|
let mut border_paint = femtovg::Paint::color(path.stroke_color().into());
|
|
border_paint.set_line_width(path.stroke_width());
|
|
|
|
self.shared_data.canvas.borrow_mut().save_with(|canvas| {
|
|
canvas.translate(pos.x + path.x(), pos.y + path.y());
|
|
canvas.fill_path(&mut fpath, fill_paint);
|
|
canvas.stroke_path(&mut fpath, border_paint);
|
|
})
|
|
}
|
|
|
|
fn draw_box_shadow(
|
|
&mut self,
|
|
pos: Point,
|
|
box_shadow: std::pin::Pin<&sixtyfps_corelib::items::BoxShadow>,
|
|
) {
|
|
// TODO: cache path in item to avoid re-tesselation
|
|
|
|
let blur = box_shadow.blur();
|
|
|
|
let shadow_outer_rect: euclid::Rect<f32, euclid::UnknownUnit> = euclid::rect(
|
|
box_shadow.x() + box_shadow.offset_x() - blur / 2.,
|
|
box_shadow.y() + box_shadow.offset_y() - blur / 2.,
|
|
box_shadow.width() + blur,
|
|
box_shadow.height() + blur,
|
|
);
|
|
|
|
let shadow_inner_rect: euclid::Rect<f32, euclid::UnknownUnit> = euclid::rect(
|
|
box_shadow.x() + box_shadow.offset_x() + blur / 2.,
|
|
box_shadow.y() + box_shadow.offset_y() + blur / 2.,
|
|
box_shadow.width() - blur,
|
|
box_shadow.height() - blur,
|
|
);
|
|
|
|
let shadow_fill_rect: euclid::Rect<f32, euclid::UnknownUnit> = euclid::rect(
|
|
shadow_outer_rect.min_x() + blur / 2.,
|
|
shadow_outer_rect.min_y() + blur / 2.,
|
|
box_shadow.width(),
|
|
box_shadow.height(),
|
|
);
|
|
|
|
let paint = femtovg::Paint::box_gradient(
|
|
shadow_fill_rect.min_x(),
|
|
shadow_fill_rect.min_y(),
|
|
shadow_fill_rect.width(),
|
|
shadow_fill_rect.height(),
|
|
box_shadow.border_radius(),
|
|
box_shadow.blur(),
|
|
box_shadow.color().into(),
|
|
Color::from_argb_u8(0, 0, 0, 0).into(),
|
|
);
|
|
|
|
let mut path = femtovg::Path::new();
|
|
path.rounded_rect(
|
|
shadow_outer_rect.min_x(),
|
|
shadow_outer_rect.min_y(),
|
|
shadow_outer_rect.width(),
|
|
shadow_outer_rect.height(),
|
|
box_shadow.border_radius(),
|
|
);
|
|
path.rect(
|
|
shadow_inner_rect.min_x(),
|
|
shadow_inner_rect.min_y(),
|
|
shadow_inner_rect.width(),
|
|
shadow_inner_rect.height(),
|
|
);
|
|
path.solidity(femtovg::Solidity::Hole);
|
|
|
|
self.shared_data.canvas.borrow_mut().save_with(|canvas| {
|
|
canvas.translate(pos.x, pos.y);
|
|
canvas.fill_path(&mut path, paint);
|
|
|
|
let mut shadow_inner_path = femtovg::Path::new();
|
|
shadow_inner_path.rect(
|
|
shadow_inner_rect.min_x(),
|
|
shadow_inner_rect.min_y(),
|
|
shadow_inner_rect.width(),
|
|
shadow_inner_rect.height(),
|
|
);
|
|
let fill = femtovg::Paint::color(box_shadow.color().into());
|
|
canvas.fill_path(&mut shadow_inner_path, fill);
|
|
})
|
|
}
|
|
|
|
fn combine_clip(&mut self, pos: Point, rect: Rect) {
|
|
let clip_rect = rect.translate([pos.x, pos.y].into());
|
|
self.shared_data.canvas.borrow_mut().intersect_scissor(
|
|
clip_rect.min_x(),
|
|
clip_rect.min_y(),
|
|
clip_rect.width(),
|
|
clip_rect.height(),
|
|
);
|
|
}
|
|
|
|
fn save_state(&mut self) {
|
|
self.shared_data.canvas.borrow_mut().save();
|
|
}
|
|
|
|
fn restore_state(&mut self) {
|
|
self.shared_data.canvas.borrow_mut().restore();
|
|
}
|
|
|
|
fn scale_factor(&self) -> f32 {
|
|
self.scale_factor
|
|
}
|
|
|
|
fn draw_cached_pixmap(
|
|
&mut self,
|
|
item_cache: &CachedRenderingData,
|
|
pos: Point,
|
|
update_fn: &dyn Fn(&mut dyn FnMut(u32, u32, &[u8])),
|
|
) {
|
|
let canvas = &self.shared_data.canvas;
|
|
let mut cache = self.shared_data.item_graphics_cache.borrow_mut();
|
|
|
|
let cache_entry = item_cache.ensure_up_to_date(&mut cache, || {
|
|
let mut cached_image = None;
|
|
update_fn(&mut |width: u32, height: u32, data: &[u8]| {
|
|
use rgb::FromSlice;
|
|
let img = imgref::Img::new(data.as_rgba(), width as usize, height as usize);
|
|
if let Some(image_id) =
|
|
canvas.borrow_mut().create_image(img, femtovg::ImageFlags::PREMULTIPLIED).ok()
|
|
{
|
|
cached_image = Some(ItemGraphicsCacheEntry::Image(Rc::new(
|
|
CachedImage::new_on_gpu(canvas, image_id, None),
|
|
)))
|
|
};
|
|
});
|
|
cached_image
|
|
});
|
|
let image_id = match cache_entry {
|
|
Some(ItemGraphicsCacheEntry::Image(image)) => image.ensure_uploaded_to_gpu(&self),
|
|
None => return,
|
|
};
|
|
let mut canvas = self.shared_data.canvas.borrow_mut();
|
|
|
|
let image_info = canvas.image_info(image_id).unwrap();
|
|
let (width, height) = (image_info.width() as f32, image_info.height() as f32);
|
|
let fill_paint = femtovg::Paint::image(image_id, pos.x, pos.y, width, height, 0.0, 1.0);
|
|
let mut path = femtovg::Path::new();
|
|
path.rect(pos.x, pos.y, width, height);
|
|
canvas.fill_path(&mut path, fill_paint);
|
|
}
|
|
|
|
fn as_any(&mut self) -> &mut dyn std::any::Any {
|
|
self
|
|
}
|
|
}
|
|
|
|
impl GLItemRenderer {
|
|
fn draw_text_impl(
|
|
&mut self,
|
|
pos: Point,
|
|
max_width: f32,
|
|
max_height: f32,
|
|
text: &str,
|
|
font_request: FontRequest,
|
|
color: Color,
|
|
horizontal_alignment: TextHorizontalAlignment,
|
|
vertical_alignment: TextVerticalAlignment,
|
|
) -> femtovg::TextMetrics {
|
|
let font = self.shared_data.loaded_fonts.borrow_mut().font(
|
|
&self.shared_data.canvas,
|
|
font_request,
|
|
self.scale_factor,
|
|
);
|
|
|
|
let mut paint = font.paint();
|
|
paint.set_color(color.into());
|
|
|
|
let mut canvas = self.shared_data.canvas.borrow_mut();
|
|
let (text_width, text_height) = {
|
|
let text_metrics = canvas.measure_text(0., 0., &text, paint).unwrap();
|
|
let font_metrics = canvas.measure_font(paint).unwrap();
|
|
(text_metrics.width(), font_metrics.height())
|
|
};
|
|
|
|
let translate_x = match horizontal_alignment {
|
|
TextHorizontalAlignment::left => 0.,
|
|
TextHorizontalAlignment::center => max_width / 2. - text_width / 2.,
|
|
TextHorizontalAlignment::right => max_width - text_width,
|
|
};
|
|
|
|
let translate_y = match vertical_alignment {
|
|
TextVerticalAlignment::top => 0.,
|
|
TextVerticalAlignment::center => max_height / 2. - text_height / 2.,
|
|
TextVerticalAlignment::bottom => max_height - text_height,
|
|
};
|
|
|
|
canvas.fill_text(pos.x + translate_x, pos.y + translate_y, text, paint).unwrap()
|
|
}
|
|
|
|
fn draw_image_impl(
|
|
&mut self,
|
|
pos: Point,
|
|
item_cache: &CachedRenderingData,
|
|
source_property: std::pin::Pin<&Property<Resource>>,
|
|
source_clip_rect: Rect,
|
|
target_width: f32,
|
|
target_height: f32,
|
|
image_fit: ImageFit,
|
|
) {
|
|
if target_width <= 0. || target_height < 0. {
|
|
return;
|
|
}
|
|
|
|
let cached_image =
|
|
match self.shared_data.load_cached_item_image(item_cache, || source_property.get()) {
|
|
Some(image) => image,
|
|
None => return,
|
|
};
|
|
|
|
let image_id = cached_image.ensure_uploaded_to_gpu(&self);
|
|
let image_size = cached_image.size();
|
|
|
|
let (source_width, source_height) = if source_clip_rect.is_empty() {
|
|
(image_size.width, image_size.height)
|
|
} else {
|
|
(source_clip_rect.width() as _, source_clip_rect.height() as _)
|
|
};
|
|
|
|
let fill_paint = femtovg::Paint::image(
|
|
image_id,
|
|
-source_clip_rect.min_x(),
|
|
-source_clip_rect.min_y(),
|
|
image_size.width,
|
|
image_size.height,
|
|
0.0,
|
|
1.0,
|
|
);
|
|
|
|
let mut path = femtovg::Path::new();
|
|
path.rect(0., 0., source_width, source_height);
|
|
|
|
self.shared_data.canvas.borrow_mut().save_with(|canvas| {
|
|
canvas.translate(pos.x, pos.y);
|
|
|
|
match image_fit {
|
|
ImageFit::fill => {
|
|
canvas.scale(target_width / source_width, target_height / source_height);
|
|
}
|
|
ImageFit::contain => {
|
|
let ratio =
|
|
f32::max(target_width / source_width, target_height / source_height);
|
|
canvas.scale(ratio, ratio)
|
|
}
|
|
};
|
|
|
|
canvas.fill_path(&mut path, fill_paint);
|
|
})
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, PartialEq, Eq, Hash)]
|
|
struct FontCacheKey {
|
|
family: SharedString,
|
|
weight: i32,
|
|
}
|
|
|
|
struct GLFont {
|
|
fonts: Vec<femtovg::FontId>,
|
|
pixel_size: f32,
|
|
canvas: CanvasRc,
|
|
}
|
|
|
|
impl GLFont {
|
|
fn measure(&self, text: &str) -> femtovg::TextMetrics {
|
|
self.canvas.borrow_mut().measure_text(0., 0., text, self.paint()).unwrap()
|
|
}
|
|
|
|
fn height(&self) -> f32 {
|
|
self.canvas.borrow_mut().measure_font(self.paint()).unwrap().height()
|
|
}
|
|
|
|
fn paint(&self) -> femtovg::Paint {
|
|
let mut paint = femtovg::Paint::default();
|
|
paint.set_font(&self.fonts);
|
|
paint.set_font_size(self.pixel_size);
|
|
paint.set_text_baseline(femtovg::Baseline::Top);
|
|
paint
|
|
}
|
|
|
|
fn text_size(&self, text: &str, max_width: Option<f32>) -> Size {
|
|
let paint = self.paint();
|
|
let mut canvas = self.canvas.borrow_mut();
|
|
let font_metrics = canvas.measure_font(paint).unwrap();
|
|
let mut y = 0.;
|
|
let mut width = 0.;
|
|
let mut height = 0.;
|
|
let mut start = 0;
|
|
if let Some(max_width) = max_width {
|
|
while start < text.len() {
|
|
let index = canvas.break_text(max_width, &text[start..], paint).unwrap();
|
|
if index == 0 {
|
|
break;
|
|
}
|
|
let index = start + index;
|
|
let mesure = canvas.measure_text(0., 0., &text[start..index], paint).unwrap();
|
|
start = index;
|
|
height = y + mesure.height();
|
|
y += font_metrics.height();
|
|
width = mesure.width().max(width);
|
|
}
|
|
} else {
|
|
for line in text.lines() {
|
|
let mesure = canvas.measure_text(0., 0., line, paint).unwrap();
|
|
height = y + mesure.height();
|
|
y += font_metrics.height();
|
|
width = mesure.width().max(width);
|
|
}
|
|
}
|
|
euclid::size2(width, height)
|
|
}
|
|
}
|
|
|
|
struct GLFontMetrics {
|
|
request: FontRequest,
|
|
scale_factor: f32,
|
|
shared_data: Rc<GLRendererData>,
|
|
}
|
|
|
|
impl FontMetrics for GLFontMetrics {
|
|
fn text_size(&self, text: &str) -> Size {
|
|
self.font().text_size(text, None)
|
|
}
|
|
|
|
fn text_offset_for_x_position<'a>(&self, text: &'a str, x: f32) -> usize {
|
|
let metrics = self.font().measure(text);
|
|
let mut current_x = 0.;
|
|
for glyph in metrics.glyphs {
|
|
if current_x + glyph.advance_x / 2. >= x {
|
|
return glyph.byte_index;
|
|
}
|
|
current_x += glyph.advance_x;
|
|
}
|
|
return text.len();
|
|
}
|
|
|
|
fn height(&self) -> f32 {
|
|
self.shared_data.canvas.borrow_mut().measure_font(self.font().paint()).unwrap().height()
|
|
}
|
|
}
|
|
|
|
impl GLFontMetrics {
|
|
fn font(&self) -> GLFont {
|
|
self.shared_data.loaded_fonts.borrow_mut().font(
|
|
&self.shared_data.canvas,
|
|
self.request.clone(),
|
|
self.scale_factor,
|
|
)
|
|
}
|
|
}
|
|
|
|
#[cfg(target_arch = "wasm32")]
|
|
pub fn create_gl_window_with_canvas_id(canvas_id: String) -> ComponentWindow {
|
|
let platform_window = GraphicsWindow::new(move |event_loop, window_builder| {
|
|
GLRenderer::new(event_loop, window_builder, &canvas_id)
|
|
});
|
|
let window = Rc::new(sixtyfps_corelib::window::Window::new(platform_window.clone()));
|
|
platform_window.self_weak.set(Rc::downgrade(&window)).ok().unwrap();
|
|
ComponentWindow(window)
|
|
}
|
|
|
|
#[doc(hidden)]
|
|
#[cold]
|
|
pub fn use_modules() {
|
|
sixtyfps_corelib::use_modules();
|
|
}
|
|
|
|
pub type NativeWidgets = ();
|
|
pub type NativeGlobals = ();
|
|
pub mod native_widgets {}
|
|
pub const HAS_NATIVE_STYLE: bool = false;
|
|
pub const IS_AVAILABLE: bool = true;
|
|
|
|
thread_local!(pub(crate) static CLIPBOARD : std::cell::RefCell<copypasta::ClipboardContext> = std::cell::RefCell::new(copypasta::ClipboardContext::new().unwrap()));
|
|
|
|
pub struct Backend;
|
|
impl sixtyfps_corelib::backend::Backend for Backend {
|
|
fn create_window(&'static self) -> ComponentWindow {
|
|
let platform_window = GraphicsWindow::new(|event_loop, window_builder| {
|
|
GLRenderer::new(
|
|
event_loop,
|
|
window_builder,
|
|
#[cfg(target_arch = "wasm32")]
|
|
"canvas",
|
|
)
|
|
});
|
|
let window = Rc::new(sixtyfps_corelib::window::Window::new(platform_window.clone()));
|
|
platform_window.self_weak.set(Rc::downgrade(&window)).ok().unwrap();
|
|
ComponentWindow(window)
|
|
}
|
|
|
|
fn run_event_loop(&'static self) {
|
|
crate::eventloop::run();
|
|
}
|
|
|
|
fn register_application_font_from_memory(
|
|
&'static self,
|
|
data: &'static [u8],
|
|
) -> Result<(), Box<dyn std::error::Error>> {
|
|
self::register_application_font_from_memory(data)
|
|
}
|
|
|
|
fn set_clipboard_text(&'static self, text: String) {
|
|
use copypasta::ClipboardProvider;
|
|
CLIPBOARD.with(|clipboard| clipboard.borrow_mut().set_contents(text).ok());
|
|
}
|
|
|
|
fn clipboard_text(&'static self) -> Option<String> {
|
|
use copypasta::ClipboardProvider;
|
|
CLIPBOARD.with(|clipboard| clipboard.borrow_mut().get_contents().ok())
|
|
}
|
|
}
|