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263 lines
10 KiB
Rust
263 lines
10 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use azure::azure_hl::AntialiasMode;
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use canvas_traits::canvas::*;
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use crate::canvas_data::*;
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use euclid::Size2D;
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use ipc_channel::ipc::{self, IpcSender};
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use std::borrow::ToOwned;
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use std::collections::HashMap;
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use std::thread;
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use webrender_api;
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pub struct CanvasPaintThread <'a> {
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canvases: HashMap<CanvasId, CanvasData<'a>>,
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next_canvas_id: CanvasId,
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}
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impl<'a> CanvasPaintThread <'a> {
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fn new() -> CanvasPaintThread <'a> {
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CanvasPaintThread {
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canvases: HashMap::new(),
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next_canvas_id: CanvasId(0),
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}
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}
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/// Creates a new `CanvasPaintThread` and returns an `IpcSender` to
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/// communicate with it.
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pub fn start() -> IpcSender<CanvasMsg> {
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let (sender, receiver) = ipc::channel::<CanvasMsg>().unwrap();
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thread::Builder::new().name("CanvasThread".to_owned()).spawn(move || {
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let mut canvas_paint_thread = CanvasPaintThread::new();
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loop {
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match receiver.recv() {
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Ok(msg) => {
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match msg {
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CanvasMsg::Canvas2d(message, canvas_id) => {
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canvas_paint_thread.process_canvas_2d_message(message, canvas_id);
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},
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CanvasMsg::Close(canvas_id) =>{
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canvas_paint_thread.canvases.remove(&canvas_id);
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},
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CanvasMsg::Create(creator, size, webrenderer_api_sender, antialias) => {
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let canvas_id = canvas_paint_thread.create_canvas(
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size,
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webrenderer_api_sender,
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antialias
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);
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creator.send(canvas_id).unwrap();
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},
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CanvasMsg::Recreate(size, canvas_id) =>{
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canvas_paint_thread.canvas(canvas_id).recreate(size);
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},
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CanvasMsg::FromScript(message, canvas_id) => {
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match message {
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FromScriptMsg::SendPixels(chan) => {
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canvas_paint_thread.canvas(canvas_id).send_pixels(chan);
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}
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}
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},
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CanvasMsg::FromLayout(message, canvas_id) => {
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match message {
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FromLayoutMsg::SendData(chan) => {
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canvas_paint_thread.canvas(canvas_id).send_data(chan);
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}
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}
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},
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CanvasMsg::Exit => break,
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}
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},
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Err(e) => {
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warn!("Error on CanvasPaintThread receive ({})", e);
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}
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}
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}
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}).expect("Thread spawning failed");
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sender
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}
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pub fn create_canvas(
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&mut self,
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size: Size2D<u32>,
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webrender_api_sender: webrender_api::RenderApiSender,
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antialias: bool
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) -> CanvasId {
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let antialias = if antialias {
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AntialiasMode::Default
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} else {
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AntialiasMode::None
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};
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let canvas_id = self.next_canvas_id.clone();
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self.next_canvas_id.0 += 1;
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let canvas_data = CanvasData::new(size, webrender_api_sender, antialias, canvas_id.clone());
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self.canvases.insert(canvas_id.clone(), canvas_data);
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canvas_id
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}
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fn process_canvas_2d_message(&mut self, message: Canvas2dMsg, canvas_id: CanvasId) {
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match message {
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Canvas2dMsg::FillText(text, x, y, max_width) => {
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self.canvas(canvas_id).fill_text(text, x, y, max_width)
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},
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Canvas2dMsg::FillRect(ref rect) => {
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self.canvas(canvas_id).fill_rect(rect)
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},
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Canvas2dMsg::StrokeRect(ref rect) => {
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self.canvas(canvas_id).stroke_rect(rect)
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},
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Canvas2dMsg::ClearRect(ref rect) => {
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self.canvas(canvas_id).clear_rect(rect)
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},
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Canvas2dMsg::BeginPath => {
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self.canvas(canvas_id).begin_path()
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},
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Canvas2dMsg::ClosePath => {
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self.canvas(canvas_id).close_path()
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},
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Canvas2dMsg::Fill => {
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self.canvas(canvas_id).fill()
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},
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Canvas2dMsg::Stroke => {
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self.canvas(canvas_id).stroke()
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},
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Canvas2dMsg::Clip => {
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self.canvas(canvas_id).clip()
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},
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Canvas2dMsg::IsPointInPath(x, y, fill_rule, chan) => {
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self.canvas(canvas_id).is_point_in_path(x, y, fill_rule, chan)
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},
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Canvas2dMsg::DrawImage(
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imagedata,
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image_size,
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dest_rect,
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source_rect,
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smoothing_enabled,
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) => {
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let data = imagedata.map_or_else(
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|| vec![0; image_size.width as usize * image_size.height as usize * 4],
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|bytes| bytes.into(),
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);
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self.canvas(canvas_id).draw_image(
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data,
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image_size,
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dest_rect,
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source_rect,
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smoothing_enabled,
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)
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},
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Canvas2dMsg::DrawImageInOther(
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other_canvas_id,
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image_size,
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dest_rect,
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source_rect,
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smoothing
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) => {
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let image_data = self.canvas(canvas_id).read_pixels(
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source_rect.to_u32(),
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image_size.to_u32(),
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);
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self.canvas(other_canvas_id).draw_image(
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image_data.into(),
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source_rect.size,
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dest_rect,
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source_rect,
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smoothing,
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);
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},
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Canvas2dMsg::MoveTo(ref point) => {
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self.canvas(canvas_id).move_to(point)
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},
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Canvas2dMsg::LineTo(ref point) => {
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self.canvas(canvas_id).line_to(point)
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},
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Canvas2dMsg::Rect(ref rect) => {
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self.canvas(canvas_id).rect(rect)
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},
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Canvas2dMsg::QuadraticCurveTo(ref cp, ref pt) => {
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self.canvas(canvas_id).quadratic_curve_to(cp, pt)
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}
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Canvas2dMsg::BezierCurveTo(ref cp1, ref cp2, ref pt) => {
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self.canvas(canvas_id).bezier_curve_to(cp1, cp2, pt)
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}
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Canvas2dMsg::Arc(ref center, radius, start, end, ccw) => {
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self.canvas(canvas_id).arc(center, radius, start, end, ccw)
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}
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Canvas2dMsg::ArcTo(ref cp1, ref cp2, radius) => {
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self.canvas(canvas_id).arc_to(cp1, cp2, radius)
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}
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Canvas2dMsg::Ellipse(ref center, radius_x, radius_y, rotation, start, end, ccw) => {
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self.canvas(canvas_id).ellipse(
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center,
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radius_x,
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radius_y,
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rotation,
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start,
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end,
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ccw
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)
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}
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Canvas2dMsg::RestoreContext => {
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self.canvas(canvas_id).restore_context_state()
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},
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Canvas2dMsg::SaveContext => {
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self.canvas(canvas_id).save_context_state()
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},
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Canvas2dMsg::SetFillStyle(style) => {
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self.canvas(canvas_id).set_fill_style(style)
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},
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Canvas2dMsg::SetStrokeStyle(style) => {
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self.canvas(canvas_id).set_stroke_style(style)
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},
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Canvas2dMsg::SetLineWidth(width) => {
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self.canvas(canvas_id).set_line_width(width)
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},
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Canvas2dMsg::SetLineCap(cap) => {
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self.canvas(canvas_id).set_line_cap(cap)
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},
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Canvas2dMsg::SetLineJoin(join) => {
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self.canvas(canvas_id).set_line_join(join)
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},
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Canvas2dMsg::SetMiterLimit(limit) => {
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self.canvas(canvas_id).set_miter_limit(limit)
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},
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Canvas2dMsg::SetTransform(ref matrix) => {
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self.canvas(canvas_id).set_transform(matrix)
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},
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Canvas2dMsg::SetGlobalAlpha(alpha) => {
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self.canvas(canvas_id).set_global_alpha(alpha)
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},
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Canvas2dMsg::SetGlobalComposition(op) => {
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self.canvas(canvas_id).set_global_composition(op)
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},
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Canvas2dMsg::GetImageData(dest_rect, canvas_size, sender) => {
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let pixels = self.canvas(canvas_id).read_pixels(dest_rect, canvas_size);
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sender.send(&pixels).unwrap();
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},
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Canvas2dMsg::PutImageData(rect, receiver) => {
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self.canvas(canvas_id).put_image_data(receiver.recv().unwrap(), rect);
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},
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Canvas2dMsg::SetShadowOffsetX(value) => {
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self.canvas(canvas_id).set_shadow_offset_x(value)
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},
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Canvas2dMsg::SetShadowOffsetY(value) => {
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self.canvas(canvas_id).set_shadow_offset_y(value)
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},
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Canvas2dMsg::SetShadowBlur(value) => {
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self.canvas(canvas_id).set_shadow_blur(value)
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},
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Canvas2dMsg::SetShadowColor(ref color) => {
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self.canvas(canvas_id).set_shadow_color(color.to_azure_style())
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},
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}
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}
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fn canvas(&mut self, canvas_id: CanvasId) -> &mut CanvasData<'a> {
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self.canvases.get_mut(&canvas_id).expect("Bogus canvas id")
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}
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}
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