mirror of
https://github.com/servo/servo.git
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a86f77e36d
WebRender. This happens asynchronously, just as it does in non-WebRender mode. This functionality is a prerequisite for doing proper display-list-based hit testing in WebRender, since it moves the scroll offsets into Servo (and, specifically, into the script thread, enabling iframe event forwarding) instead of keeping them private to WebRender. Requires servo/webrender_traits#55 and servo/webrender#277. Partially addresses #11108.
596 lines
28 KiB
Rust
596 lines
28 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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// TODO(gw): This contains helper traits and implementations for converting Servo display lists
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// into WebRender display lists. In the future, this step should be completely removed.
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// This might be achieved by sharing types between WR and Servo display lists, or
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// completely converting layout to directly generate WebRender display lists, for example.
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use app_units::Au;
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use azure::azure_hl::Color;
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use euclid::{Point2D, Rect, Size2D};
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use gfx::display_list::{BorderRadii, BoxShadowClipMode, ClippingRegion};
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use gfx::display_list::{DisplayItem, DisplayList, DisplayListTraversal};
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use gfx::display_list::{GradientStop, StackingContext, StackingContextType};
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use gfx_traits::{FragmentType, ScrollPolicy, StackingContextId};
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use style::computed_values::filter::{self, Filter};
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use style::computed_values::{image_rendering, mix_blend_mode};
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use style::values::computed::BorderStyle;
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use webrender_traits::{self, AuxiliaryListsBuilder, DisplayListId, PipelineId};
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trait WebRenderStackingContextConverter {
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fn convert_to_webrender<'a>(&self,
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traversal: &mut DisplayListTraversal<'a>,
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api: &mut webrender_traits::RenderApi,
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pipeline_id: webrender_traits::PipelineId,
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epoch: webrender_traits::Epoch,
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scroll_layer_id: Option<webrender_traits::ScrollLayerId>,
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scroll_policy: ScrollPolicy,
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frame_builder: &mut WebRenderFrameBuilder)
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-> webrender_traits::StackingContextId;
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fn convert_children_to_webrender<'a>(&self,
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traversal: &mut DisplayListTraversal<'a>,
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api: &mut webrender_traits::RenderApi,
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pipeline_id: webrender_traits::PipelineId,
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epoch: webrender_traits::Epoch,
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scroll_layer_id: Option<webrender_traits::ScrollLayerId>,
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scroll_policy: ScrollPolicy,
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builder: &mut webrender_traits::DisplayListBuilder,
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frame_builder: &mut WebRenderFrameBuilder,
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force_positioned_stacking_level: bool);
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}
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pub trait WebRenderDisplayListConverter {
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fn convert_to_webrender(&self,
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api: &mut webrender_traits::RenderApi,
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pipeline_id: webrender_traits::PipelineId,
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epoch: webrender_traits::Epoch,
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scroll_layer_id: Option<webrender_traits::ScrollLayerId>,
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frame_builder: &mut WebRenderFrameBuilder)
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-> webrender_traits::StackingContextId;
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}
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trait WebRenderDisplayItemConverter {
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fn convert_to_webrender(&self,
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builder: &mut webrender_traits::DisplayListBuilder,
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frame_builder: &mut WebRenderFrameBuilder);
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}
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trait ToBorderStyle {
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fn to_border_style(&self) -> webrender_traits::BorderStyle;
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}
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impl ToBorderStyle for BorderStyle {
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fn to_border_style(&self) -> webrender_traits::BorderStyle {
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match *self {
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BorderStyle::none => webrender_traits::BorderStyle::None,
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BorderStyle::solid => webrender_traits::BorderStyle::Solid,
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BorderStyle::double => webrender_traits::BorderStyle::Double,
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BorderStyle::dotted => webrender_traits::BorderStyle::Dotted,
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BorderStyle::dashed => webrender_traits::BorderStyle::Dashed,
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BorderStyle::hidden => webrender_traits::BorderStyle::Hidden,
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BorderStyle::groove => webrender_traits::BorderStyle::Groove,
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BorderStyle::ridge => webrender_traits::BorderStyle::Ridge,
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BorderStyle::inset => webrender_traits::BorderStyle::Inset,
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BorderStyle::outset => webrender_traits::BorderStyle::Outset,
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}
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}
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}
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trait ToBoxShadowClipMode {
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fn to_clip_mode(&self) -> webrender_traits::BoxShadowClipMode;
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}
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impl ToBoxShadowClipMode for BoxShadowClipMode {
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fn to_clip_mode(&self) -> webrender_traits::BoxShadowClipMode {
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match *self {
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BoxShadowClipMode::None => webrender_traits::BoxShadowClipMode::None,
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BoxShadowClipMode::Inset => webrender_traits::BoxShadowClipMode::Inset,
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BoxShadowClipMode::Outset => webrender_traits::BoxShadowClipMode::Outset,
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}
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}
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}
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trait ToSizeF {
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fn to_sizef(&self) -> Size2D<f32>;
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}
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trait ToPointF {
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fn to_pointf(&self) -> Point2D<f32>;
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}
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impl ToPointF for Point2D<Au> {
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fn to_pointf(&self) -> Point2D<f32> {
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Point2D::new(self.x.to_f32_px(), self.y.to_f32_px())
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}
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}
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impl ToSizeF for Size2D<Au> {
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fn to_sizef(&self) -> Size2D<f32> {
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Size2D::new(self.width.to_f32_px(), self.height.to_f32_px())
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}
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}
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trait ToRectF {
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fn to_rectf(&self) -> Rect<f32>;
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}
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impl ToRectF for Rect<Au> {
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fn to_rectf(&self) -> Rect<f32> {
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let x = self.origin.x.to_f32_px();
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let y = self.origin.y.to_f32_px();
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let w = self.size.width.to_f32_px();
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let h = self.size.height.to_f32_px();
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Rect::new(Point2D::new(x, y), Size2D::new(w, h))
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}
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}
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trait ToColorF {
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fn to_colorf(&self) -> webrender_traits::ColorF;
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}
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impl ToColorF for Color {
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fn to_colorf(&self) -> webrender_traits::ColorF {
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webrender_traits::ColorF::new(self.r, self.g, self.b, self.a)
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}
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}
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trait ToGradientStop {
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fn to_gradient_stop(&self) -> webrender_traits::GradientStop;
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}
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impl ToGradientStop for GradientStop {
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fn to_gradient_stop(&self) -> webrender_traits::GradientStop {
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webrender_traits::GradientStop {
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offset: self.offset,
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color: self.color.to_colorf(),
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}
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}
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}
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trait ToClipRegion {
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fn to_clip_region(&self, frame_builder: &mut WebRenderFrameBuilder)
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-> webrender_traits::ClipRegion;
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}
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impl ToClipRegion for ClippingRegion {
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fn to_clip_region(&self, frame_builder: &mut WebRenderFrameBuilder)
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-> webrender_traits::ClipRegion {
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webrender_traits::ClipRegion::new(&self.main.to_rectf(),
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self.complex.iter().map(|complex_clipping_region| {
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webrender_traits::ComplexClipRegion::new(
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complex_clipping_region.rect.to_rectf(),
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complex_clipping_region.radii.to_border_radius(),
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)
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}).collect(),
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&mut frame_builder.auxiliary_lists_builder)
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}
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}
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trait ToBorderRadius {
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fn to_border_radius(&self) -> webrender_traits::BorderRadius;
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}
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impl ToBorderRadius for BorderRadii<Au> {
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fn to_border_radius(&self) -> webrender_traits::BorderRadius {
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webrender_traits::BorderRadius {
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top_left: self.top_left.to_sizef(),
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top_right: self.top_right.to_sizef(),
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bottom_left: self.bottom_left.to_sizef(),
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bottom_right: self.bottom_right.to_sizef(),
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}
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}
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}
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trait ToBlendMode {
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fn to_blend_mode(&self) -> webrender_traits::MixBlendMode;
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}
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impl ToBlendMode for mix_blend_mode::T {
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fn to_blend_mode(&self) -> webrender_traits::MixBlendMode {
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match *self {
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mix_blend_mode::T::normal => webrender_traits::MixBlendMode::Normal,
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mix_blend_mode::T::multiply => webrender_traits::MixBlendMode::Multiply,
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mix_blend_mode::T::screen => webrender_traits::MixBlendMode::Screen,
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mix_blend_mode::T::overlay => webrender_traits::MixBlendMode::Overlay,
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mix_blend_mode::T::darken => webrender_traits::MixBlendMode::Darken,
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mix_blend_mode::T::lighten => webrender_traits::MixBlendMode::Lighten,
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mix_blend_mode::T::color_dodge => webrender_traits::MixBlendMode::ColorDodge,
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mix_blend_mode::T::color_burn => webrender_traits::MixBlendMode::ColorBurn,
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mix_blend_mode::T::hard_light => webrender_traits::MixBlendMode::HardLight,
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mix_blend_mode::T::soft_light => webrender_traits::MixBlendMode::SoftLight,
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mix_blend_mode::T::difference => webrender_traits::MixBlendMode::Difference,
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mix_blend_mode::T::exclusion => webrender_traits::MixBlendMode::Exclusion,
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mix_blend_mode::T::hue => webrender_traits::MixBlendMode::Hue,
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mix_blend_mode::T::saturation => webrender_traits::MixBlendMode::Saturation,
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mix_blend_mode::T::color => webrender_traits::MixBlendMode::Color,
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mix_blend_mode::T::luminosity => webrender_traits::MixBlendMode::Luminosity,
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}
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}
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}
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trait ToImageRendering {
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fn to_image_rendering(&self) -> webrender_traits::ImageRendering;
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}
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impl ToImageRendering for image_rendering::T {
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fn to_image_rendering(&self) -> webrender_traits::ImageRendering {
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match *self {
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image_rendering::T::CrispEdges => webrender_traits::ImageRendering::CrispEdges,
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image_rendering::T::Auto => webrender_traits::ImageRendering::Auto,
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image_rendering::T::Pixelated => webrender_traits::ImageRendering::Pixelated,
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}
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}
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}
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trait ToFilterOps {
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fn to_filter_ops(&self) -> Vec<webrender_traits::FilterOp>;
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}
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impl ToFilterOps for filter::T {
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fn to_filter_ops(&self) -> Vec<webrender_traits::FilterOp> {
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let mut result = Vec::with_capacity(self.filters.len());
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for filter in self.filters.iter() {
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match *filter {
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Filter::Blur(radius) => result.push(webrender_traits::FilterOp::Blur(radius)),
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Filter::Brightness(amount) => result.push(webrender_traits::FilterOp::Brightness(amount)),
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Filter::Contrast(amount) => result.push(webrender_traits::FilterOp::Contrast(amount)),
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Filter::Grayscale(amount) => result.push(webrender_traits::FilterOp::Grayscale(amount)),
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Filter::HueRotate(angle) => result.push(webrender_traits::FilterOp::HueRotate(angle.0)),
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Filter::Invert(amount) => result.push(webrender_traits::FilterOp::Invert(amount)),
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Filter::Opacity(amount) => result.push(webrender_traits::FilterOp::Opacity(amount)),
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Filter::Saturate(amount) => result.push(webrender_traits::FilterOp::Saturate(amount)),
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Filter::Sepia(amount) => result.push(webrender_traits::FilterOp::Sepia(amount)),
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}
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}
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result
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}
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}
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impl WebRenderStackingContextConverter for StackingContext {
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fn convert_children_to_webrender<'a>(&self,
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traversal: &mut DisplayListTraversal<'a>,
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api: &mut webrender_traits::RenderApi,
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pipeline_id: webrender_traits::PipelineId,
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epoch: webrender_traits::Epoch,
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scroll_layer_id: Option<webrender_traits::ScrollLayerId>,
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scroll_policy: ScrollPolicy,
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builder: &mut webrender_traits::DisplayListBuilder,
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frame_builder: &mut WebRenderFrameBuilder,
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_force_positioned_stacking_level: bool) {
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for child in self.children.iter() {
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while let Some(item) = traversal.advance(self) {
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item.convert_to_webrender(builder, frame_builder);
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}
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if child.context_type == StackingContextType::Real {
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let scroll_layer_id_for_children = if self.scrolls_overflow_area {
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scroll_layer_id
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} else {
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None
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};
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let stacking_context_id = child.convert_to_webrender(traversal,
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api,
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pipeline_id,
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epoch,
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scroll_layer_id_for_children,
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scroll_policy,
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frame_builder);
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builder.push_stacking_context(stacking_context_id);
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} else {
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child.convert_children_to_webrender(traversal,
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api,
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pipeline_id,
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epoch,
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scroll_layer_id,
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scroll_policy,
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builder,
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frame_builder,
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true);
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}
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}
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while let Some(item) = traversal.advance(self) {
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item.convert_to_webrender(builder, frame_builder);
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}
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}
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fn convert_to_webrender<'a>(&self,
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traversal: &mut DisplayListTraversal<'a>,
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api: &mut webrender_traits::RenderApi,
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pipeline_id: webrender_traits::PipelineId,
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epoch: webrender_traits::Epoch,
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mut scroll_layer_id: Option<webrender_traits::ScrollLayerId>,
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mut scroll_policy: ScrollPolicy,
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frame_builder: &mut WebRenderFrameBuilder)
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-> webrender_traits::StackingContextId {
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if let Some(ref layer_info) = self.layer_info {
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scroll_policy = layer_info.scroll_policy
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}
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let webrender_scroll_policy = match scroll_policy {
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ScrollPolicy::Scrollable => webrender_traits::ScrollPolicy::Scrollable,
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ScrollPolicy::FixedPosition => webrender_traits::ScrollPolicy::Fixed,
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};
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let webrender_stacking_context_id = self.id.convert_to_webrender();
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let mut sc =
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webrender_traits::StackingContext::new(webrender_stacking_context_id,
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scroll_layer_id,
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webrender_scroll_policy,
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self.bounds.to_rectf(),
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self.overflow.to_rectf(),
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self.z_index,
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&self.transform,
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&self.perspective,
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self.establishes_3d_context,
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self.blend_mode.to_blend_mode(),
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self.filters.to_filter_ops(),
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&mut frame_builder.auxiliary_lists_builder);
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let mut builder = webrender_traits::DisplayListBuilder::new();
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if self.scrolls_overflow_area {
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scroll_layer_id = Some(frame_builder.next_scroll_layer_id());
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}
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self.convert_children_to_webrender(traversal,
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api,
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pipeline_id,
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epoch,
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scroll_layer_id,
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scroll_policy,
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&mut builder,
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frame_builder,
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false);
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frame_builder.add_display_list(api, builder.finalize(), &mut sc);
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frame_builder.add_stacking_context(api, pipeline_id, sc)
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}
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}
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impl WebRenderDisplayListConverter for DisplayList {
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fn convert_to_webrender(&self,
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api: &mut webrender_traits::RenderApi,
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pipeline_id: webrender_traits::PipelineId,
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epoch: webrender_traits::Epoch,
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scroll_layer_id: Option<webrender_traits::ScrollLayerId>,
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frame_builder: &mut WebRenderFrameBuilder)
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-> webrender_traits::StackingContextId {
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let mut traversal = DisplayListTraversal {
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display_list: self,
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current_item_index: 0,
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last_item_index: self.list.len() - 1,
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};
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self.root_stacking_context.convert_to_webrender(&mut traversal,
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api,
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pipeline_id,
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epoch,
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scroll_layer_id,
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ScrollPolicy::Scrollable,
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frame_builder)
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}
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}
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impl WebRenderDisplayItemConverter for DisplayItem {
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fn convert_to_webrender(&self,
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builder: &mut webrender_traits::DisplayListBuilder,
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frame_builder: &mut WebRenderFrameBuilder) {
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match *self {
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DisplayItem::SolidColorClass(ref item) => {
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let color = item.color.to_colorf();
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if color.a > 0.0 {
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builder.push_rect(item.base.bounds.to_rectf(),
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item.base.clip.to_clip_region(frame_builder),
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color);
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}
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}
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DisplayItem::TextClass(ref item) => {
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let mut origin = item.baseline_origin.clone();
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let mut glyphs = vec!();
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for slice in item.text_run.natural_word_slices_in_visual_order(&item.range) {
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for glyph in slice.glyphs.iter_glyphs_for_byte_range(&slice.range) {
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let glyph_advance = if glyph.char_is_space() {
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glyph.advance() + item.text_run.extra_word_spacing
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} else {
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glyph.advance()
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};
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if !slice.glyphs.is_whitespace() {
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let glyph_offset = glyph.offset().unwrap_or(Point2D::zero());
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let glyph = webrender_traits::GlyphInstance {
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index: glyph.id(),
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x: (origin.x + glyph_offset.x).to_f32_px(),
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y: (origin.y + glyph_offset.y).to_f32_px(),
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};
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glyphs.push(glyph);
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}
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origin.x = origin.x + glyph_advance;
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};
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}
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if glyphs.len() > 0 {
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builder.push_text(item.base.bounds.to_rectf(),
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item.base.clip.to_clip_region(frame_builder),
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glyphs,
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item.text_run.font_key.expect("Font not added to webrender!"),
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item.text_color.to_colorf(),
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item.text_run.actual_pt_size,
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item.blur_radius,
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&mut frame_builder.auxiliary_lists_builder);
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}
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}
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DisplayItem::ImageClass(ref item) => {
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if let Some(id) = item.webrender_image.key {
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if item.stretch_size.width > Au(0) &&
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item.stretch_size.height > Au(0) {
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builder.push_image(item.base.bounds.to_rectf(),
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item.base.clip.to_clip_region(frame_builder),
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item.stretch_size.to_sizef(),
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item.image_rendering.to_image_rendering(),
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id);
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}
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}
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}
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DisplayItem::WebGLClass(ref item) => {
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builder.push_webgl_canvas(item.base.bounds.to_rectf(),
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item.base.clip.to_clip_region(frame_builder),
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item.context_id);
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}
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DisplayItem::BorderClass(ref item) => {
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let rect = item.base.bounds.to_rectf();
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let left = webrender_traits::BorderSide {
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width: item.border_widths.left.to_f32_px(),
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color: item.color.left.to_colorf(),
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style: item.style.left.to_border_style(),
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};
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let top = webrender_traits::BorderSide {
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width: item.border_widths.top.to_f32_px(),
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color: item.color.top.to_colorf(),
|
|
style: item.style.top.to_border_style(),
|
|
};
|
|
let right = webrender_traits::BorderSide {
|
|
width: item.border_widths.right.to_f32_px(),
|
|
color: item.color.right.to_colorf(),
|
|
style: item.style.right.to_border_style(),
|
|
};
|
|
let bottom = webrender_traits::BorderSide {
|
|
width: item.border_widths.bottom.to_f32_px(),
|
|
color: item.color.bottom.to_colorf(),
|
|
style: item.style.bottom.to_border_style(),
|
|
};
|
|
let radius = item.radius.to_border_radius();
|
|
builder.push_border(rect,
|
|
item.base.clip.to_clip_region(frame_builder),
|
|
left,
|
|
top,
|
|
right,
|
|
bottom,
|
|
radius);
|
|
}
|
|
DisplayItem::GradientClass(ref item) => {
|
|
let rect = item.base.bounds.to_rectf();
|
|
let start_point = item.start_point.to_pointf();
|
|
let end_point = item.end_point.to_pointf();
|
|
let mut stops = Vec::new();
|
|
for stop in &item.stops {
|
|
stops.push(stop.to_gradient_stop());
|
|
}
|
|
builder.push_gradient(rect,
|
|
item.base.clip.to_clip_region(frame_builder),
|
|
start_point,
|
|
end_point,
|
|
stops,
|
|
&mut frame_builder.auxiliary_lists_builder);
|
|
}
|
|
DisplayItem::LineClass(..) => {
|
|
println!("TODO DisplayItem::LineClass");
|
|
}
|
|
DisplayItem::LayeredItemClass(..) => {
|
|
panic!("Unexpected in webrender!");
|
|
}
|
|
DisplayItem::BoxShadowClass(ref item) => {
|
|
let rect = item.base.bounds.to_rectf();
|
|
let box_bounds = item.box_bounds.to_rectf();
|
|
builder.push_box_shadow(rect,
|
|
item.base.clip.to_clip_region(frame_builder),
|
|
box_bounds,
|
|
item.offset.to_pointf(),
|
|
item.color.to_colorf(),
|
|
item.blur_radius.to_f32_px(),
|
|
item.spread_radius.to_f32_px(),
|
|
item.border_radius.to_f32_px(),
|
|
item.clip_mode.to_clip_mode());
|
|
}
|
|
DisplayItem::IframeClass(ref item) => {
|
|
let rect = item.base.bounds.to_rectf();
|
|
let pipeline_id = item.iframe.to_webrender();
|
|
builder.push_iframe(rect,
|
|
item.base.clip.to_clip_region(frame_builder),
|
|
pipeline_id);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
pub struct WebRenderFrameBuilder {
|
|
pub stacking_contexts: Vec<(webrender_traits::StackingContextId,
|
|
webrender_traits::StackingContext)>,
|
|
pub display_lists: Vec<(DisplayListId, webrender_traits::BuiltDisplayList)>,
|
|
pub auxiliary_lists_builder: AuxiliaryListsBuilder,
|
|
pub root_pipeline_id: PipelineId,
|
|
pub next_scroll_layer_id: usize,
|
|
}
|
|
|
|
impl WebRenderFrameBuilder {
|
|
pub fn new(root_pipeline_id: PipelineId) -> WebRenderFrameBuilder {
|
|
WebRenderFrameBuilder {
|
|
stacking_contexts: vec![],
|
|
display_lists: vec![],
|
|
auxiliary_lists_builder: AuxiliaryListsBuilder::new(),
|
|
root_pipeline_id: root_pipeline_id,
|
|
next_scroll_layer_id: 0,
|
|
}
|
|
}
|
|
|
|
pub fn add_stacking_context(&mut self,
|
|
api: &mut webrender_traits::RenderApi,
|
|
pipeline_id: PipelineId,
|
|
stacking_context: webrender_traits::StackingContext)
|
|
-> webrender_traits::StackingContextId {
|
|
assert!(pipeline_id == self.root_pipeline_id);
|
|
let id = api.next_stacking_context_id();
|
|
self.stacking_contexts.push((id, stacking_context));
|
|
id
|
|
}
|
|
|
|
pub fn add_display_list(&mut self,
|
|
api: &mut webrender_traits::RenderApi,
|
|
display_list: webrender_traits::BuiltDisplayList,
|
|
stacking_context: &mut webrender_traits::StackingContext)
|
|
-> DisplayListId {
|
|
let id = api.next_display_list_id();
|
|
stacking_context.has_stacking_contexts = stacking_context.has_stacking_contexts ||
|
|
display_list.descriptor().has_stacking_contexts;
|
|
stacking_context.display_lists.push(id);
|
|
self.display_lists.push((id, display_list));
|
|
id
|
|
}
|
|
|
|
pub fn next_scroll_layer_id(&mut self) -> webrender_traits::ScrollLayerId {
|
|
let scroll_layer_id = self.next_scroll_layer_id;
|
|
self.next_scroll_layer_id += 1;
|
|
webrender_traits::ScrollLayerId::new(self.root_pipeline_id, scroll_layer_id)
|
|
}
|
|
}
|
|
|
|
trait WebRenderStackingContextIdConverter {
|
|
fn convert_to_webrender(&self) -> webrender_traits::ServoStackingContextId;
|
|
}
|
|
|
|
impl WebRenderStackingContextIdConverter for StackingContextId {
|
|
fn convert_to_webrender(&self) -> webrender_traits::ServoStackingContextId {
|
|
webrender_traits::ServoStackingContextId(self.fragment_type().convert_to_webrender(),
|
|
self.id())
|
|
}
|
|
}
|
|
|
|
trait WebRenderFragmentTypeConverter {
|
|
fn convert_to_webrender(&self) -> webrender_traits::FragmentType;
|
|
}
|
|
|
|
impl WebRenderFragmentTypeConverter for FragmentType {
|
|
fn convert_to_webrender(&self) -> webrender_traits::FragmentType {
|
|
match *self {
|
|
FragmentType::FragmentBody => webrender_traits::FragmentType::FragmentBody,
|
|
FragmentType::BeforePseudoContent => {
|
|
webrender_traits::FragmentType::BeforePseudoContent
|
|
}
|
|
FragmentType::AfterPseudoContent => webrender_traits::FragmentType::AfterPseudoContent,
|
|
}
|
|
}
|
|
}
|
|
|