mirror of
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fd3a99ead3
This only works for simple translations and similar, but I want Patrick to validate my approach.
799 lines
34 KiB
Rust
799 lines
34 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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//! The thread that handles all painting.
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use app_units::Au;
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use azure::AzFloat;
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use azure::azure_hl::{BackendType, Color, DrawTarget, SurfaceFormat};
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use display_list::{DisplayItem, DisplayList, DisplayListTraversal};
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use display_list::{LayerInfo, StackingContext, StackingContextType};
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use euclid::Matrix4D;
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use euclid::point::Point2D;
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use euclid::rect::{Rect, TypedRect};
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use euclid::size::Size2D;
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use font_cache_thread::FontCacheThread;
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use font_context::FontContext;
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use gfx_traits::{ChromeToPaintMsg, Epoch, LayerId, LayerKind, LayerProperties};
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use gfx_traits::{PaintListener, PaintRequest, StackingContextId};
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use layers::layers::{BufferRequest, LayerBuffer, LayerBufferSet};
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use layers::platform::surface::{NativeDisplay, NativeSurface};
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use msg::constellation_msg::PipelineId;
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use paint_context::PaintContext;
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use profile_traits::mem;
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use profile_traits::time;
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use rand::{self, Rng};
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use std::borrow::ToOwned;
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use std::collections::HashMap;
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use std::mem as std_mem;
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use std::sync::Arc;
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use std::sync::mpsc::{Receiver, Sender, channel};
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use url::Url;
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use util::geometry::ExpandToPixelBoundaries;
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use util::opts;
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use util::thread;
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use util::thread_state;
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#[derive(Clone, HeapSizeOf)]
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struct PaintLayer {
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/// The LayerProperties, which describe the layer in a way that the Compositor
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/// can consume.
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pub layer_properties: LayerProperties,
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/// The StackingContextId of the StackingContext that is the immediate
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/// parent of this layer. This is used to ensure applying the proper transform
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/// when painting.
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pub starting_stacking_context_id: StackingContextId,
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/// The indices (in the DisplayList) to the first and last display item
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/// that are the contents of this layer.
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pub display_list_indices: Option<(usize, usize)>,
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/// When painting, whether to draw the start by entering the surrounding StackingContext
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/// or simply to draw the single item this PaintLayer contains.
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pub single_item: bool,
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/// The layer's bounds start at the overflow origin, but display items are
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/// positioned relative to the stacking context bounds, so we need to
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/// offset by the overflow rect (which will be in the coordinate system of
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/// the stacking context bounds).
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pub display_list_origin: Point2D<f32>
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}
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impl PaintLayer {
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fn new_from_stacking_context(layer_info: &LayerInfo,
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stacking_context: &StackingContext,
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parent_origin: &Point2D<Au>,
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transform: &Matrix4D<f32>,
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perspective: &Matrix4D<f32>,
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parent_id: Option<LayerId>)
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-> PaintLayer {
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let bounds = Rect::new(stacking_context.bounds.origin + stacking_context.overflow.origin,
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stacking_context.overflow.size);
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let layer_boundaries = Rect::new(
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Point2D::new((parent_origin.x + bounds.min_x()).to_nearest_px() as f32,
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(parent_origin.y + bounds.min_y()).to_nearest_px() as f32),
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Size2D::new(bounds.size.width.to_nearest_px() as f32,
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bounds.size.height.to_nearest_px() as f32));
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let transform = transform.mul(&stacking_context.transform);
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let perspective = perspective.mul(&stacking_context.perspective);
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let establishes_3d_context = stacking_context.establishes_3d_context;
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let scrolls_overflow_area = stacking_context.scrolls_overflow_area;
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PaintLayer {
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layer_properties: LayerProperties {
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id: layer_info.layer_id,
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parent_id: parent_id,
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rect: layer_boundaries,
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background_color: layer_info.background_color,
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scroll_policy: layer_info.scroll_policy,
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transform: transform,
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perspective: perspective,
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establishes_3d_context: establishes_3d_context,
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scrolls_overflow_area: scrolls_overflow_area,
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subpage_pipeline_id: layer_info.subpage_pipeline_id,
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},
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starting_stacking_context_id: stacking_context.id,
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display_list_indices: None,
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single_item: false,
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display_list_origin: Point2D::new(stacking_context.overflow.origin.x.to_f32_px(),
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stacking_context.overflow.origin.y.to_f32_px()),
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}
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}
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fn new_for_display_item(layer_info: &LayerInfo,
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item_bounds: &Rect<Au>,
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parent_origin: &Point2D<Au>,
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transform: &Matrix4D<f32>,
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perspective: &Matrix4D<f32>,
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parent_id: Option<LayerId>,
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stacking_context_id: StackingContextId,
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item_index: usize)
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-> PaintLayer {
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let bounds = item_bounds.expand_to_px_boundaries();
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let layer_boundaries = Rect::new(
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Point2D::new((parent_origin.x + bounds.min_x()).to_nearest_px() as f32,
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(parent_origin.y + bounds.min_y()).to_nearest_px() as f32),
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Size2D::new(bounds.size.width.to_nearest_px() as f32,
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bounds.size.height.to_nearest_px() as f32));
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PaintLayer {
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layer_properties: LayerProperties {
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id: layer_info.layer_id,
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parent_id: parent_id,
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rect: layer_boundaries,
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background_color: layer_info.background_color,
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scroll_policy: layer_info.scroll_policy,
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transform: *transform,
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perspective: *perspective,
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establishes_3d_context: false,
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scrolls_overflow_area: false,
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subpage_pipeline_id: layer_info.subpage_pipeline_id,
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},
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starting_stacking_context_id: stacking_context_id,
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display_list_indices: Some((item_index, item_index)),
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single_item: true,
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display_list_origin: Point2D::new(bounds.origin.x.to_f32_px(),
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bounds.origin.y.to_f32_px()),
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}
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}
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fn add_item(&mut self, index: usize) {
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let indices = match self.display_list_indices {
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Some((first, _)) => (first, index),
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None => (index, index),
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};
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self.display_list_indices = Some(indices);
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}
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fn make_companion_layer(&mut self) {
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self.layer_properties.id = self.layer_properties.id.companion_layer_id();
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self.display_list_indices = None;
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}
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}
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struct LayerCreator {
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layers: Vec<PaintLayer>,
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layer_details_stack: Vec<PaintLayer>,
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current_layer: Option<PaintLayer>,
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current_item_index: usize,
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}
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impl LayerCreator {
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fn create_layers_with_display_list(display_list: &DisplayList) -> Vec<PaintLayer> {
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let mut layer_creator = LayerCreator {
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layers: Vec::new(),
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layer_details_stack: Vec::new(),
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current_layer: None,
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current_item_index: 0,
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};
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let mut traversal = DisplayListTraversal {
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display_list: display_list,
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current_item_index: 0,
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last_item_index: display_list.list.len(),
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};
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layer_creator.create_layers_for_stacking_context(&display_list.root_stacking_context,
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&mut traversal,
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&Point2D::zero(),
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&Matrix4D::identity(),
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&Matrix4D::identity());
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layer_creator.layers
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}
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fn finalize_current_layer(&mut self) {
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if let Some(current_layer) = self.current_layer.take() {
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self.layers.push(current_layer);
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}
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}
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fn current_parent_layer_id(&self) -> Option<LayerId> {
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self.layer_details_stack.last().as_ref().map(|layer|
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layer.layer_properties.id
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)
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}
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fn current_parent_stacking_context_id(&self) -> StackingContextId {
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self.layer_details_stack.last().unwrap().starting_stacking_context_id
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}
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fn create_layers_for_stacking_context<'a>(&mut self,
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stacking_context: &StackingContext,
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traversal: &mut DisplayListTraversal<'a>,
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parent_origin: &Point2D<Au>,
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transform: &Matrix4D<f32>,
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perspective: &Matrix4D<f32>) {
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if let Some(ref layer_info) = stacking_context.layer_info {
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self.finalize_current_layer();
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let new_layer = PaintLayer::new_from_stacking_context(
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layer_info,
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stacking_context,
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parent_origin,
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transform,
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perspective,
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self.current_parent_layer_id());
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self.layer_details_stack.push(new_layer.clone());
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self.current_layer = Some(new_layer);
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// When there is a new layer, the transforms and origin are handled by
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// the compositor, so the new transform and perspective matrices are
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// just the identity.
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//
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// The origin for child layers which might be somewhere other than the
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// layer origin, since layer boundaries are expanded to include overflow.
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self.process_stacking_context_items(stacking_context,
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traversal,
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&-stacking_context.overflow.origin,
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&Matrix4D::identity(),
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&Matrix4D::identity());
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self.finalize_current_layer();
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self.layer_details_stack.pop();
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return;
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}
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if stacking_context.context_type != StackingContextType::Real {
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self.process_stacking_context_items(stacking_context,
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traversal,
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parent_origin,
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transform,
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perspective);
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return;
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}
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self.process_stacking_context_items(stacking_context,
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traversal,
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&(stacking_context.bounds.origin + *parent_origin),
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&transform.mul(&stacking_context.transform),
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&perspective.mul(&stacking_context.perspective));
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}
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fn process_stacking_context_items<'a>(&mut self,
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stacking_context: &StackingContext,
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traversal: &mut DisplayListTraversal<'a>,
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parent_origin: &Point2D<Au>,
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transform: &Matrix4D<f32>,
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perspective: &Matrix4D<f32>) {
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for kid in stacking_context.children() {
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while let Some(item) = traversal.advance(stacking_context) {
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self.create_layers_for_item(item,
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parent_origin,
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transform,
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perspective);
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}
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self.create_layers_for_stacking_context(kid,
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traversal,
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parent_origin,
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transform,
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perspective);
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}
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while let Some(item) = traversal.advance(stacking_context) {
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self.create_layers_for_item(item,
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parent_origin,
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transform,
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perspective);
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}
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}
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fn create_layers_for_item<'a>(&mut self,
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item: &DisplayItem,
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parent_origin: &Point2D<Au>,
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transform: &Matrix4D<f32>,
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perspective: &Matrix4D<f32>) {
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if let &DisplayItem::LayeredItemClass(ref layered_item) = item {
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// We need to finalize the last layer here before incrementing the item
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// index, otherwise this item will be placed into the parent layer.
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self.finalize_current_layer();
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let layer = PaintLayer::new_for_display_item(
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&layered_item.layer_info,
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&layered_item.item.bounds(),
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parent_origin,
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transform,
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perspective,
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self.current_parent_layer_id(),
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self.current_parent_stacking_context_id(),
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self.current_item_index);
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self.layers.push(layer);
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self.current_item_index += 1;
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return;
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}
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// If we don't have a current layer, we are an item that belonged to a
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// previous layer that was finalized by a child layer. We need to
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// resurrect a copy of the original ancestor layer to ensure that this
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// item is ordered on top of the child layers when painted.
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if self.current_layer.is_none() {
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let mut new_layer = self.layer_details_stack.pop().unwrap();
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new_layer.make_companion_layer();
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if new_layer.layer_properties.parent_id == None {
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new_layer.layer_properties.parent_id =
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Some(new_layer.layer_properties.id.original());
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}
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self.layer_details_stack.push(new_layer.clone());
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self.current_layer = Some(new_layer);
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}
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if let Some(ref mut current_layer) = self.current_layer {
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current_layer.add_item(self.current_item_index);
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}
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self.current_item_index += 1;
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}
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}
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pub enum Msg {
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FromLayout(LayoutToPaintMsg),
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FromChrome(ChromeToPaintMsg),
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}
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#[derive(Deserialize, Serialize)]
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pub enum LayoutToPaintMsg {
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PaintInit(Epoch, Arc<DisplayList>),
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Exit,
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}
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pub struct PaintThread<C> {
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id: PipelineId,
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_url: Url,
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layout_to_paint_port: Receiver<LayoutToPaintMsg>,
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chrome_to_paint_port: Receiver<ChromeToPaintMsg>,
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compositor: C,
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/// A channel to the time profiler.
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time_profiler_chan: time::ProfilerChan,
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/// The root paint layer sent to us by the layout thread.
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root_display_list: Option<Arc<DisplayList>>,
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/// A map that associates LayerIds with their corresponding layers.
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layer_map: HashMap<LayerId, Arc<PaintLayer>>,
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/// Permission to send paint messages to the compositor
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paint_permission: bool,
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/// The current epoch counter is passed by the layout thread
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current_epoch: Option<Epoch>,
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/// Communication handles to each of the worker threads.
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worker_threads: Vec<WorkerThreadProxy>,
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}
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// If we implement this as a function, we get borrowck errors from borrowing
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// the whole PaintThread struct.
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macro_rules! native_display(
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($thread:expr) => (
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$thread.native_display.as_ref().expect("Need a graphics context to do painting")
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)
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);
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impl<C> PaintThread<C> where C: PaintListener + Send + 'static {
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pub fn create(id: PipelineId,
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url: Url,
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chrome_to_paint_chan: Sender<ChromeToPaintMsg>,
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layout_to_paint_port: Receiver<LayoutToPaintMsg>,
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chrome_to_paint_port: Receiver<ChromeToPaintMsg>,
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mut compositor: C,
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font_cache_thread: FontCacheThread,
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time_profiler_chan: time::ProfilerChan,
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mem_profiler_chan: mem::ProfilerChan) {
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thread::spawn_named(format!("PaintThread {:?}", id), move || {
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thread_state::initialize(thread_state::PAINT);
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PipelineId::install(id);
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let native_display = compositor.native_display();
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let worker_threads = WorkerThreadProxy::spawn(native_display,
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font_cache_thread,
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time_profiler_chan.clone());
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let mut paint_thread = PaintThread {
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id: id,
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_url: url,
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layout_to_paint_port: layout_to_paint_port,
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chrome_to_paint_port: chrome_to_paint_port,
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compositor: compositor,
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time_profiler_chan: time_profiler_chan,
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root_display_list: None,
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layer_map: HashMap::new(),
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paint_permission: false,
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current_epoch: None,
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worker_threads: worker_threads,
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};
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let reporter_name = format!("paint-reporter-{}", id);
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mem_profiler_chan.run_with_memory_reporting(|| {
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paint_thread.start();
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}, reporter_name, chrome_to_paint_chan, ChromeToPaintMsg::CollectReports);
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// Tell all the worker threads to shut down.
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for worker_thread in &mut paint_thread.worker_threads {
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worker_thread.exit()
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}
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});
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}
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#[allow(unsafe_code)]
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fn start(&mut self) {
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debug!("PaintThread: beginning painting loop");
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loop {
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let message = {
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let layout_to_paint = &self.layout_to_paint_port;
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let chrome_to_paint = &self.chrome_to_paint_port;
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select! {
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msg = layout_to_paint.recv() =>
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Msg::FromLayout(msg.expect("expected message from layout")),
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msg = chrome_to_paint.recv() =>
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Msg::FromChrome(msg.expect("expected message from chrome"))
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}
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};
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match message {
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Msg::FromLayout(LayoutToPaintMsg::PaintInit(epoch, display_list)) => {
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self.current_epoch = Some(epoch);
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self.root_display_list = Some(display_list);
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if self.paint_permission {
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self.initialize_layers();
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}
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}
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Msg::FromChrome(ChromeToPaintMsg::Paint(requests, frame_tree_id)) => {
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if self.paint_permission && self.root_display_list.is_some() {
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let mut replies = Vec::new();
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for PaintRequest { buffer_requests, scale, layer_id, epoch, layer_kind }
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in requests {
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if self.current_epoch == Some(epoch) {
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self.paint(&mut replies, buffer_requests, scale, layer_id, layer_kind);
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} else {
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debug!("PaintThread: Ignoring requests with epoch mismatch: {:?} != {:?}",
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self.current_epoch,
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epoch);
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self.compositor.ignore_buffer_requests(buffer_requests);
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}
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}
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debug!("PaintThread: returning surfaces");
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self.compositor.assign_painted_buffers(self.id,
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self.current_epoch.unwrap(),
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replies,
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frame_tree_id);
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}
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}
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Msg::FromChrome(ChromeToPaintMsg::PaintPermissionGranted) => {
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self.paint_permission = true;
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if self.root_display_list.is_some() {
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self.initialize_layers();
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}
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}
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Msg::FromChrome(ChromeToPaintMsg::PaintPermissionRevoked) => {
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self.paint_permission = false;
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}
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Msg::FromChrome(ChromeToPaintMsg::CollectReports(ref channel)) => {
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// FIXME(njn): should eventually measure the paint thread.
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channel.send(Vec::new())
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}
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Msg::FromLayout(LayoutToPaintMsg::Exit) => {
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// Ask the compositor to remove any layers it is holding for this paint thread.
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// FIXME(mrobinson): This can probably move back to the constellation now.
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debug!("PaintThread: Exiting.");
|
|
self.compositor.notify_paint_thread_exiting(self.id);
|
|
|
|
break;
|
|
}
|
|
Msg::FromChrome(ChromeToPaintMsg::Exit) => {
|
|
// Ask the compositor to remove any layers it is holding for this paint thread.
|
|
// FIXME(mrobinson): This can probably move back to the constellation now.
|
|
debug!("PaintThread: Exiting.");
|
|
self.compositor.notify_paint_thread_exiting(self.id);
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Paints one layer and places the painted tiles in `replies`.
|
|
fn paint(&mut self,
|
|
replies: &mut Vec<(LayerId, Box<LayerBufferSet>)>,
|
|
mut tiles: Vec<BufferRequest>,
|
|
scale: f32,
|
|
layer_id: LayerId,
|
|
layer_kind: LayerKind) {
|
|
time::profile(time::ProfilerCategory::Painting, None, self.time_profiler_chan.clone(), || {
|
|
let display_list = match self.root_display_list {
|
|
Some(ref display_list) => display_list.clone(),
|
|
None => return,
|
|
};
|
|
|
|
// Bail out if there is no appropriate layer.
|
|
let layer = match self.layer_map.get(&layer_id) {
|
|
Some(layer) => layer.clone(),
|
|
None => return,
|
|
};
|
|
|
|
// Divide up the layer into tiles and distribute them to workers via a simple round-
|
|
// robin strategy.
|
|
let tiles = std_mem::replace(&mut tiles, Vec::new());
|
|
let tile_count = tiles.len();
|
|
for (i, tile) in tiles.into_iter().enumerate() {
|
|
let thread_id = i % self.worker_threads.len();
|
|
self.worker_threads[thread_id].paint_tile(thread_id,
|
|
tile,
|
|
display_list.clone(),
|
|
layer.clone(),
|
|
scale,
|
|
layer_kind);
|
|
}
|
|
let new_buffers = (0..tile_count).map(|i| {
|
|
let thread_id = i % self.worker_threads.len();
|
|
self.worker_threads[thread_id].painted_tile_buffer()
|
|
}).collect();
|
|
|
|
let layer_buffer_set = box LayerBufferSet {
|
|
buffers: new_buffers,
|
|
};
|
|
replies.push((layer_id, layer_buffer_set));
|
|
})
|
|
}
|
|
|
|
fn initialize_layers(&mut self) {
|
|
let root_display_list = match self.root_display_list {
|
|
None => return,
|
|
Some(ref root_display_list) => root_display_list,
|
|
};
|
|
let layers = LayerCreator::create_layers_with_display_list(&root_display_list);
|
|
let properties = layers.iter().map(|layer| layer.layer_properties.clone()).collect();
|
|
self.compositor.initialize_layers_for_pipeline(self.id,
|
|
properties,
|
|
self.current_epoch.unwrap());
|
|
self.layer_map.clear();
|
|
for layer in layers.into_iter() {
|
|
self.layer_map.insert(layer.layer_properties.id, Arc::new(layer));
|
|
}
|
|
}
|
|
}
|
|
|
|
struct WorkerThreadProxy {
|
|
sender: Sender<MsgToWorkerThread>,
|
|
receiver: Receiver<MsgFromWorkerThread>,
|
|
}
|
|
|
|
impl WorkerThreadProxy {
|
|
fn spawn(native_display: Option<NativeDisplay>,
|
|
font_cache_thread: FontCacheThread,
|
|
time_profiler_chan: time::ProfilerChan)
|
|
-> Vec<WorkerThreadProxy> {
|
|
// Don't make any paint threads if we're using WebRender. They're just a waste of
|
|
// resources.
|
|
if opts::get().use_webrender {
|
|
return vec![]
|
|
}
|
|
|
|
let thread_count = opts::get().paint_threads;
|
|
(0..thread_count).map(|_| {
|
|
let (from_worker_sender, from_worker_receiver) = channel();
|
|
let (to_worker_sender, to_worker_receiver) = channel();
|
|
let font_cache_thread = font_cache_thread.clone();
|
|
let time_profiler_chan = time_profiler_chan.clone();
|
|
thread::spawn_named("PaintWorker".to_owned(), move || {
|
|
let mut worker_thread = WorkerThread::new(from_worker_sender,
|
|
to_worker_receiver,
|
|
native_display,
|
|
font_cache_thread,
|
|
time_profiler_chan);
|
|
worker_thread.main();
|
|
});
|
|
WorkerThreadProxy {
|
|
receiver: from_worker_receiver,
|
|
sender: to_worker_sender,
|
|
}
|
|
}).collect()
|
|
}
|
|
|
|
fn paint_tile(&mut self,
|
|
thread_id: usize,
|
|
tile: BufferRequest,
|
|
display_list: Arc<DisplayList>,
|
|
paint_layer: Arc<PaintLayer>,
|
|
scale: f32,
|
|
layer_kind: LayerKind) {
|
|
let msg = MsgToWorkerThread::PaintTile(thread_id,
|
|
tile,
|
|
display_list,
|
|
paint_layer,
|
|
scale,
|
|
layer_kind);
|
|
self.sender.send(msg).unwrap()
|
|
}
|
|
|
|
fn painted_tile_buffer(&mut self) -> Box<LayerBuffer> {
|
|
match self.receiver.recv().unwrap() {
|
|
MsgFromWorkerThread::PaintedTile(layer_buffer) => layer_buffer,
|
|
}
|
|
}
|
|
|
|
fn exit(&mut self) {
|
|
self.sender.send(MsgToWorkerThread::Exit).unwrap()
|
|
}
|
|
}
|
|
|
|
struct WorkerThread {
|
|
sender: Sender<MsgFromWorkerThread>,
|
|
receiver: Receiver<MsgToWorkerThread>,
|
|
native_display: Option<NativeDisplay>,
|
|
font_context: Box<FontContext>,
|
|
time_profiler_sender: time::ProfilerChan,
|
|
}
|
|
|
|
impl WorkerThread {
|
|
fn new(sender: Sender<MsgFromWorkerThread>,
|
|
receiver: Receiver<MsgToWorkerThread>,
|
|
native_display: Option<NativeDisplay>,
|
|
font_cache_thread: FontCacheThread,
|
|
time_profiler_sender: time::ProfilerChan)
|
|
-> WorkerThread {
|
|
WorkerThread {
|
|
sender: sender,
|
|
receiver: receiver,
|
|
native_display: native_display,
|
|
font_context: box FontContext::new(font_cache_thread.clone()),
|
|
time_profiler_sender: time_profiler_sender,
|
|
}
|
|
}
|
|
|
|
fn main(&mut self) {
|
|
loop {
|
|
match self.receiver.recv().unwrap() {
|
|
MsgToWorkerThread::Exit => break,
|
|
MsgToWorkerThread::PaintTile(thread_id,
|
|
tile,
|
|
display_list,
|
|
paint_layer,
|
|
scale,
|
|
layer_kind) => {
|
|
let buffer = self.optimize_and_paint_tile(thread_id,
|
|
tile,
|
|
display_list,
|
|
paint_layer,
|
|
scale,
|
|
layer_kind);
|
|
self.sender.send(MsgFromWorkerThread::PaintedTile(buffer)).unwrap()
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fn optimize_and_paint_tile(&mut self,
|
|
thread_id: usize,
|
|
mut tile: BufferRequest,
|
|
display_list: Arc<DisplayList>,
|
|
paint_layer: Arc<PaintLayer>,
|
|
scale: f32,
|
|
layer_kind: LayerKind)
|
|
-> Box<LayerBuffer> {
|
|
let size = Size2D::new(tile.screen_rect.size.width as i32,
|
|
tile.screen_rect.size.height as i32);
|
|
let mut buffer = self.create_layer_buffer(&mut tile, scale);
|
|
let draw_target = DrawTarget::new(BackendType::Skia, size, SurfaceFormat::B8G8R8A8);
|
|
|
|
{
|
|
// Build the paint context.
|
|
let mut paint_context = PaintContext {
|
|
draw_target: draw_target.clone(),
|
|
font_context: &mut self.font_context,
|
|
page_rect: TypedRect::from_untyped(&tile.page_rect.translate(&paint_layer.display_list_origin)),
|
|
screen_rect: TypedRect::from_untyped(&tile.screen_rect),
|
|
clip_rect: None,
|
|
transient_clip: None,
|
|
layer_kind: layer_kind,
|
|
subpixel_offset: Point2D::zero(),
|
|
};
|
|
|
|
// Apply the translation to paint the tile we want.
|
|
let matrix = Matrix4D::identity();
|
|
let matrix = matrix.scale(scale as AzFloat, scale as AzFloat, 1.0);
|
|
let tile_bounds = tile.page_rect.translate(&paint_layer.display_list_origin);
|
|
let matrix = matrix.translate(-tile_bounds.origin.x as AzFloat,
|
|
-tile_bounds.origin.y as AzFloat,
|
|
0.0);
|
|
|
|
// Clear the buffer.
|
|
paint_context.clear();
|
|
|
|
// Draw the display list.
|
|
time::profile(time::ProfilerCategory::PaintingPerTile,
|
|
None,
|
|
self.time_profiler_sender.clone(), || {
|
|
if let Some((start, end)) = paint_layer.display_list_indices {
|
|
if paint_layer.single_item {
|
|
display_list.draw_item_at_index_into_context(
|
|
&mut paint_context, &matrix, start);
|
|
} else {
|
|
display_list.draw_into_context(
|
|
&mut paint_context,
|
|
&matrix,
|
|
paint_layer.starting_stacking_context_id,
|
|
start,
|
|
end);
|
|
}
|
|
}
|
|
paint_context.draw_target.flush();
|
|
});
|
|
|
|
if opts::get().show_debug_parallel_paint {
|
|
// Overlay a transparent solid color to identify the thread that
|
|
// painted this tile.
|
|
let color = THREAD_TINT_COLORS[thread_id % THREAD_TINT_COLORS.len()];
|
|
paint_context.draw_solid_color(&Rect::new(Point2D::new(Au(0), Au(0)),
|
|
Size2D::new(Au::from_px(size.width),
|
|
Au::from_px(size.height))),
|
|
color);
|
|
}
|
|
if opts::get().paint_flashing {
|
|
// Overlay a random transparent color.
|
|
let color = *rand::thread_rng().choose(&THREAD_TINT_COLORS[..]).unwrap();
|
|
paint_context.draw_solid_color(&Rect::new(Point2D::new(Au(0), Au(0)),
|
|
Size2D::new(Au::from_px(size.width),
|
|
Au::from_px(size.height))),
|
|
color);
|
|
}
|
|
}
|
|
|
|
// Extract the texture from the draw target and place it into its slot in the buffer.
|
|
// Upload it first.
|
|
draw_target.snapshot().get_data_surface().with_data(|data| {
|
|
buffer.native_surface.upload(native_display!(self), data);
|
|
debug!("painting worker thread uploading to native surface {}",
|
|
buffer.native_surface.get_id());
|
|
});
|
|
|
|
draw_target.finish();
|
|
buffer
|
|
}
|
|
|
|
fn create_layer_buffer(&mut self,
|
|
tile: &mut BufferRequest,
|
|
scale: f32)
|
|
-> Box<LayerBuffer> {
|
|
// Create an empty native surface. We mark it as not leaking
|
|
// in case it dies in transit to the compositor thread.
|
|
let width = tile.screen_rect.size.width;
|
|
let height = tile.screen_rect.size.height;
|
|
let mut native_surface = tile.native_surface.take().unwrap_or_else(|| {
|
|
NativeSurface::new(native_display!(self), Size2D::new(width as i32, height as i32))
|
|
});
|
|
native_surface.mark_wont_leak();
|
|
|
|
box LayerBuffer {
|
|
native_surface: native_surface,
|
|
rect: tile.page_rect,
|
|
screen_pos: tile.screen_rect,
|
|
resolution: scale,
|
|
painted_with_cpu: true,
|
|
content_age: tile.content_age,
|
|
}
|
|
}
|
|
}
|
|
|
|
enum MsgToWorkerThread {
|
|
Exit,
|
|
PaintTile(usize, BufferRequest, Arc<DisplayList>, Arc<PaintLayer>, f32, LayerKind),
|
|
}
|
|
|
|
enum MsgFromWorkerThread {
|
|
PaintedTile(Box<LayerBuffer>),
|
|
}
|
|
|
|
pub static THREAD_TINT_COLORS: [Color; 8] = [
|
|
Color { r: 6.0 / 255.0, g: 153.0 / 255.0, b: 198.0 / 255.0, a: 0.7 },
|
|
Color { r: 255.0 / 255.0, g: 212.0 / 255.0, b: 83.0 / 255.0, a: 0.7 },
|
|
Color { r: 116.0 / 255.0, g: 29.0 / 255.0, b: 109.0 / 255.0, a: 0.7 },
|
|
Color { r: 204.0 / 255.0, g: 158.0 / 255.0, b: 199.0 / 255.0, a: 0.7 },
|
|
Color { r: 242.0 / 255.0, g: 46.0 / 255.0, b: 121.0 / 255.0, a: 0.7 },
|
|
Color { r: 116.0 / 255.0, g: 203.0 / 255.0, b: 196.0 / 255.0, a: 0.7 },
|
|
Color { r: 255.0 / 255.0, g: 249.0 / 255.0, b: 201.0 / 255.0, a: 0.7 },
|
|
Color { r: 137.0 / 255.0, g: 196.0 / 255.0, b: 78.0 / 255.0, a: 0.7 },
|
|
];
|