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4dcbe94bff
Move data structures shared between the GLRenderer and the GLItemRenderer into a *ka-ching* shared data structure. This reduces the amount of separate Rc instances. Also moving the image loading functions from GLItemRenderer to GLRendererData will allow for re-use from the GLRenderer in the future.
957 lines
34 KiB
Rust
957 lines
34 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,
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};
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use sixtyfps_corelib::item_rendering::{CachedRenderingData, ItemRenderer};
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use sixtyfps_corelib::items::ImageFit;
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use sixtyfps_corelib::items::Item;
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use sixtyfps_corelib::items::{TextHorizontalAlignment, TextVerticalAlignment};
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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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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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struct CachedImage {
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id: femtovg::ImageId,
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canvas: CanvasRc,
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}
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impl Drop for CachedImage {
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fn drop(&mut self) {
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self.canvas.borrow_mut().delete_image(self.id)
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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 GPUCachedData {
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Image(Rc<CachedImage>),
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}
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impl GPUCachedData {
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fn as_image(&self) -> &Rc<CachedImage> {
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match self {
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GPUCachedData::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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#[cfg(not(target_arch = "wasm32"))]
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mod fonts_fontdb;
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#[cfg(not(target_arch = "wasm32"))]
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pub use fonts_fontdb::register_application_font_from_memory;
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#[cfg(not(target_arch = "wasm32"))]
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use fonts_fontdb::*;
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#[cfg(target_arch = "wasm32")]
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mod fonts_wasm;
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#[cfg(target_arch = "wasm32")]
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pub use fonts_wasm::register_application_font_from_memory;
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#[cfg(target_arch = "wasm32")]
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use fonts_wasm::*;
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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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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(target_arch = "wasm32")]
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event_loop_proxy: Rc<winit::event_loop::EventLoopProxy<eventloop::CustomEvent>>,
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item_rendering_cache: RefCell<RenderingCache<Option<GPUCachedData>>>,
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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) -> femtovg::ImageId {
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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 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 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) = 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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) {
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(Some(canvas), Some(window), Some(event_loop_proxy)) => {
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(canvas, window, event_loop_proxy)
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}
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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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// 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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image_id
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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() -> femtovg::ImageId,
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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 =
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Rc::new(CachedImage { id: image_create_fn(), canvas: self.canvas.clone() });
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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 =
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Rc::new(CachedImage { id: image_create_fn(), canvas: self.canvas.clone() });
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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<GPUCachedData> {
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Some(GPUCachedData::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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self.canvas
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.borrow_mut()
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.load_image_file(
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std::path::Path::new(&path.as_str()),
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femtovg::ImageFlags::empty(),
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)
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.unwrap()
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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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self.canvas
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.borrow_mut()
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.load_image_mem(data.as_slice(), femtovg::ImageFlags::empty())
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.unwrap()
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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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// 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 Fn() -> Resource,
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) -> Option<(Rc<CachedImage>, femtovg::ImageInfo)> {
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let mut cache = self.item_rendering_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(), self.canvas.borrow().image_info(image.id).unwrap())
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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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#[cfg(not(target_arch = "wasm32"))]
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windowed_context: Option<glutin::WindowedContext<glutin::NotCurrent>>,
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}
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impl GLRenderer {
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pub fn new(
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event_loop: &winit::event_loop::EventLoop<eventloop::CustomEvent>,
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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)
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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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{
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use cocoa::appkit::NSView;
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use winit::platform::macos::WindowExtMacOS;
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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")]
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let event_loop_proxy = Rc::new(event_loop.create_proxy());
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#[cfg(target_arch = "wasm32")]
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let (window, renderer) = {
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use wasm_bindgen::JsCast;
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let canvas = web_sys::window()
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.unwrap()
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.document()
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.unwrap()
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.get_element_by_id(canvas_id)
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.unwrap()
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.dyn_into::<web_sys::HtmlCanvasElement>()
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.unwrap();
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use winit::platform::web::WindowBuilderExtWebSys;
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use winit::platform::web::WindowExtWebSys;
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let existing_canvas_size = winit::dpi::LogicalSize::new(
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canvas.client_width() as u32,
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canvas.client_height() as u32,
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);
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let window =
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Rc::new(window_builder.with_canvas(Some(canvas)).build(&event_loop).unwrap());
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// Try to maintain the existing size of the canvas element. A window created with winit
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// on the web will always have 1024x768 as size otherwise.
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let resize_canvas = {
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let event_loop_proxy = event_loop_proxy.clone();
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let canvas = web_sys::window()
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.unwrap()
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.document()
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.unwrap()
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.get_element_by_id(canvas_id)
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.unwrap()
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.dyn_into::<web_sys::HtmlCanvasElement>()
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.unwrap();
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let window = window.clone();
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move |_: web_sys::Event| {
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let existing_canvas_size = winit::dpi::LogicalSize::new(
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canvas.client_width() as u32,
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canvas.client_height() as u32,
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);
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window.set_inner_size(existing_canvas_size);
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window.request_redraw();
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event_loop_proxy.send_event(eventloop::CustomEvent::WakeUpAndPoll).ok();
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}
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};
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let resize_closure =
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wasm_bindgen::closure::Closure::wrap(Box::new(resize_canvas) as Box<dyn FnMut(_)>);
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web_sys::window()
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.unwrap()
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.add_event_listener_with_callback("resize", resize_closure.as_ref().unchecked_ref())
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.unwrap();
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resize_closure.forget();
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{
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let default_size = window.inner_size().to_logical(window.scale_factor());
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let new_size = winit::dpi::LogicalSize::new(
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if existing_canvas_size.width > 0 {
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existing_canvas_size.width
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} else {
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default_size.width
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},
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if existing_canvas_size.height > 0 {
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existing_canvas_size.height
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} else {
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default_size.height
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},
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);
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if new_size != default_size {
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window.set_inner_size(new_size);
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}
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}
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let renderer =
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femtovg::renderer::OpenGl::new_from_html_canvas(&window.canvas()).unwrap();
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(window, renderer)
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};
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let canvas = femtovg::Canvas::new(renderer).unwrap();
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let shared_data = GLRendererData {
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canvas: Rc::new(RefCell::new(canvas)),
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#[cfg(target_arch = "wasm32")]
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window,
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#[cfg(target_arch = "wasm32")]
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event_loop_proxy,
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item_rendering_cache: Default::default(),
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image_cache: Default::default(),
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loaded_fonts: Default::default(),
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};
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GLRenderer {
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shared_data: Rc::new(shared_data),
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#[cfg(not(target_arch = "wasm32"))]
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windowed_context: Some(unsafe { windowed_context.make_not_current().unwrap() }),
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}
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}
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/// Returns a new item renderer instance. At this point rendering begins and the backend ensures that the
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/// window background was cleared with the specified clear_color.
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fn new_renderer(&mut self, clear_color: &Color) -> GLItemRenderer {
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let (size, scale_factor) = {
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let window = self.window();
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(window.inner_size(), window.scale_factor() as f32)
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};
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#[cfg(not(target_arch = "wasm32"))]
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let current_windowed_context =
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unsafe { self.windowed_context.take().unwrap().make_current().unwrap() };
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{
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let mut canvas = self.shared_data.canvas.borrow_mut();
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// We pass 1.0 as dpi / device pixel ratio as femtovg only uses this factor to scale
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// text metrics. Since we do the entire translation from logical pixels to physical
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// pixels on our end, we don't need femtovg to scale a second time.
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canvas.set_size(size.width, size.height, 1.0);
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canvas.clear_rect(0, 0, size.width, size.height, clear_color.into());
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}
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GLItemRenderer {
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shared_data: self.shared_data.clone(),
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#[cfg(not(target_arch = "wasm32"))]
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windowed_context: current_windowed_context,
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scale_factor,
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}
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}
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/// Complete the item rendering by calling this function. This will typically flush any remaining/pending
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/// commands to the underlying graphics subsystem.
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fn flush_renderer(&mut self, _renderer: GLItemRenderer) {
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self.shared_data.canvas.borrow_mut().flush();
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#[cfg(not(target_arch = "wasm32"))]
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{
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_renderer.windowed_context.swap_buffers().unwrap();
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self.windowed_context =
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Some(unsafe { _renderer.windowed_context.make_not_current().unwrap() });
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}
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self.shared_data.image_cache.borrow_mut().retain(|_, cached_image_weak| {
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cached_image_weak
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.upgrade()
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.map_or(false, |cached_image_rc| Rc::strong_count(&cached_image_rc) > 1)
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});
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}
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fn window(&self) -> &winit::window::Window {
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#[cfg(not(target_arch = "wasm32"))]
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return self.windowed_context.as_ref().unwrap().window();
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#[cfg(target_arch = "wasm32")]
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return &self.shared_data.window;
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}
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|
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/// Returns a FontMetrics trait object that can be used to measure text and that matches the given font request as
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/// closely as possible.
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fn font_metrics(&mut self, request: FontRequest) -> Box<dyn FontMetrics> {
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Box::new(GLFontMetrics {
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request,
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scale_factor: self.window().scale_factor() as f32,
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shared_data: self.shared_data.clone(),
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})
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}
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}
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|
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pub struct GLItemRenderer {
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shared_data: Rc<GLRendererData>,
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
windowed_context: glutin::WindowedContext<glutin::PossiblyCurrent>,
|
|
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>,
|
|
) {
|
|
// TODO: cache path in item to avoid re-tesselation
|
|
let mut path = rect_to_path(rect.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>,
|
|
) {
|
|
// 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();
|
|
path.rounded_rect(
|
|
rect.x() + border_width / 2.,
|
|
rect.y() + border_width / 2.,
|
|
rect.width() - border_width,
|
|
rect.height() - border_width,
|
|
rect.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>) {
|
|
self.draw_text_impl(
|
|
pos + euclid::Vector2D::new(text.x(), text.y()),
|
|
text.width(),
|
|
text.height(),
|
|
&text.text(),
|
|
text.font_request(),
|
|
text.color(),
|
|
text.horizontal_alignment(),
|
|
text.vertical_alignment(),
|
|
);
|
|
}
|
|
|
|
fn draw_text_input(
|
|
&mut self,
|
|
pos: Point,
|
|
text_input: std::pin::Pin<&sixtyfps_corelib::items::TextInput>,
|
|
) {
|
|
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,
|
|
text_input.width(),
|
|
text_input.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>) {
|
|
//todo!()
|
|
}
|
|
|
|
fn combine_clip(&mut self, pos: Point, clip: std::pin::Pin<&sixtyfps_corelib::items::Clip>) {
|
|
let clip_rect = clip.geometry().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 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_rendering_cache.borrow_mut();
|
|
|
|
let cached_image = 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(GPUCachedData::Image(Rc::new(CachedImage {
|
|
id: image_id,
|
|
canvas: canvas.clone(),
|
|
})))
|
|
};
|
|
});
|
|
cached_image
|
|
});
|
|
let image_id = match cached_image {
|
|
Some(x) => x.as_image().id,
|
|
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 scale_factor(&self) -> f32 {
|
|
self.scale_factor
|
|
}
|
|
|
|
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::align_left => 0.,
|
|
TextHorizontalAlignment::align_center => max_width / 2. - text_width / 2.,
|
|
TextHorizontalAlignment::align_right => max_width - text_width,
|
|
};
|
|
|
|
let translate_y = match vertical_alignment {
|
|
TextVerticalAlignment::align_top => 0.,
|
|
TextVerticalAlignment::align_center => max_height / 2. - text_height / 2.,
|
|
TextVerticalAlignment::align_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,
|
|
) {
|
|
let (cached_image, image_info) =
|
|
match self.shared_data.load_cached_item_image(item_cache, || source_property.get()) {
|
|
Some(image) => image,
|
|
None => return,
|
|
};
|
|
|
|
let (image_width, image_height) = (image_info.width() as f32, image_info.height() as f32);
|
|
let (source_width, source_height) = if source_clip_rect.is_empty() {
|
|
(image_width, image_height)
|
|
} else {
|
|
(source_clip_rect.width() as _, source_clip_rect.height() as _)
|
|
};
|
|
|
|
let target_width = if target_width == 0. { image_width } else { target_width };
|
|
let target_height = if target_height == 0. { image_height } else { target_height };
|
|
|
|
let fill_paint = femtovg::Paint::image(
|
|
cached_image.id,
|
|
-source_clip_rect.min_x(),
|
|
-source_clip_rect.min_y(),
|
|
image_width,
|
|
image_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
|
|
}
|
|
}
|
|
|
|
struct GLFontMetrics {
|
|
request: FontRequest,
|
|
scale_factor: f32,
|
|
shared_data: Rc<GLRendererData>,
|
|
}
|
|
|
|
impl FontMetrics for GLFontMetrics {
|
|
fn text_width(&self, text: &str) -> f32 {
|
|
self.font().measure(text).width()
|
|
}
|
|
|
|
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,
|
|
)
|
|
}
|
|
}
|
|
|
|
pub fn create_window() -> ComponentWindow {
|
|
ComponentWindow::new(GraphicsWindow::new(|event_loop, window_builder| {
|
|
GLRenderer::new(
|
|
&event_loop.get_winit_event_loop(),
|
|
window_builder,
|
|
#[cfg(target_arch = "wasm32")]
|
|
"canvas",
|
|
)
|
|
}))
|
|
}
|
|
|
|
#[cfg(target_arch = "wasm32")]
|
|
pub fn create_gl_window_with_canvas_id(canvas_id: String) -> ComponentWindow {
|
|
ComponentWindow::new(GraphicsWindow::new(move |event_loop, window_builder| {
|
|
GLRenderer::new(&event_loop.get_winit_event_loop(), window_builder, &canvas_id)
|
|
}))
|
|
}
|
|
|
|
#[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;
|