mirror of
https://github.com/servo/servo.git
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9d72e89ce3
Now that WebRender can handle splitting scrolling layers on its own, we don't need to do any work to split up scroll roots. This should also make it possible to handle overflow:scroll and containing block scroll roots in the future.
445 lines
20 KiB
Rust
445 lines
20 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 euclid::{Point2D, Rect, SideOffsets2D, Size2D};
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use gfx::display_list::{BorderDetails, BorderRadii, BoxShadowClipMode, ClippingRegion};
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use gfx::display_list::{DisplayItem, DisplayList, DisplayListTraversal, StackingContextType};
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use gfx_traits::ScrollRootId;
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use msg::constellation_msg::PipelineId;
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use style::computed_values::{image_rendering, mix_blend_mode};
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use style::computed_values::filter::{self, Filter};
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use style::values::computed::BorderStyle;
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use webrender_traits::{self, DisplayListBuilder, ExtendMode, LayoutTransform, ScrollLayerId};
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pub trait WebRenderDisplayListConverter {
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fn convert_to_webrender(&self, pipeline_id: PipelineId) -> DisplayListBuilder;
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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 DisplayListBuilder,
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current_scroll_root_id: &mut ScrollRootId);
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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 ToBorderWidths {
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fn to_border_widths(&self) -> webrender_traits::BorderWidths;
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}
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impl ToBorderWidths for SideOffsets2D<Au> {
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fn to_border_widths(&self) -> webrender_traits::BorderWidths {
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webrender_traits::BorderWidths {
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left: self.left.to_f32_px(),
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top: self.top.to_f32_px(),
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right: self.right.to_f32_px(),
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bottom: self.bottom.to_f32_px(),
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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) -> webrender_traits::LayoutSize;
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}
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trait ToPointF {
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fn to_pointf(&self) -> webrender_traits::LayoutPoint;
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}
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impl ToPointF for Point2D<Au> {
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fn to_pointf(&self) -> webrender_traits::LayoutPoint {
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webrender_traits::LayoutPoint::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) -> webrender_traits::LayoutSize {
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webrender_traits::LayoutSize::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) -> webrender_traits::LayoutRect;
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}
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impl ToRectF for Rect<Au> {
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fn to_rectf(&self) -> webrender_traits::LayoutRect {
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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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let point = webrender_traits::LayoutPoint::new(x, y);
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let size = webrender_traits::LayoutSize::new(w, h);
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webrender_traits::LayoutRect::new(point, size)
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}
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}
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trait ToClipRegion {
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fn to_clip_region(&self, builder: &mut DisplayListBuilder) -> webrender_traits::ClipRegion;
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}
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impl ToClipRegion for ClippingRegion {
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fn to_clip_region(&self, builder: &mut DisplayListBuilder) -> webrender_traits::ClipRegion {
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builder.new_clip_region(&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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None)
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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::crisp_edges => 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.into())),
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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 WebRenderDisplayListConverter for DisplayList {
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fn convert_to_webrender(&self, pipeline_id: PipelineId) -> DisplayListBuilder {
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let traversal = DisplayListTraversal::new(self);
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let webrender_pipeline_id = pipeline_id.to_webrender();
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let mut builder = DisplayListBuilder::new(webrender_pipeline_id);
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let mut current_scroll_root_id = ScrollRootId::root();
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builder.push_clip_id(current_scroll_root_id.convert_to_webrender(webrender_pipeline_id));
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for item in traversal {
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item.convert_to_webrender(&mut builder, &mut current_scroll_root_id);
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}
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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 DisplayListBuilder,
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current_scroll_root_id: &mut ScrollRootId) {
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let scroll_root_id = self.base().scroll_root_id;
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if scroll_root_id != *current_scroll_root_id {
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let pipeline_id = builder.pipeline_id;
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builder.pop_clip_id();
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builder.push_clip_id(scroll_root_id.convert_to_webrender(pipeline_id));
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*current_scroll_root_id = scroll_root_id;
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}
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match *self {
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DisplayItem::SolidColor(ref item) => {
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let color = item.color;
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if color.a > 0.0 {
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let clip = item.base.clip.to_clip_region(builder);
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builder.push_rect(item.base.bounds.to_rectf(), clip, color);
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}
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}
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DisplayItem::Text(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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point: Point2D::new((origin.x + glyph_offset.x).to_f32_px(),
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(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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let clip = item.base.clip.to_clip_region(builder);
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builder.push_text(item.base.bounds.to_rectf(),
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clip,
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glyphs,
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item.text_run.font_key,
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item.text_color,
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item.text_run.actual_pt_size,
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item.blur_radius,
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None);
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}
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}
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DisplayItem::Image(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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let clip = item.base.clip.to_clip_region(builder);
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builder.push_image(item.base.bounds.to_rectf(),
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clip,
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item.stretch_size.to_sizef(),
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item.tile_spacing.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::WebGL(ref item) => {
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let clip = item.base.clip.to_clip_region(builder);
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builder.push_webgl_canvas(item.base.bounds.to_rectf(), clip, item.context_id);
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}
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DisplayItem::Border(ref item) => {
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let rect = item.base.bounds.to_rectf();
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let widths = item.border_widths.to_border_widths();
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let clip = item.base.clip.to_clip_region(builder);
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let details = match item.details {
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BorderDetails::Normal(ref border) => {
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let left = webrender_traits::BorderSide {
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color: border.color.left,
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style: border.style.left.to_border_style(),
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};
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let top = webrender_traits::BorderSide {
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color: border.color.top,
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style: border.style.top.to_border_style(),
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};
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let right = webrender_traits::BorderSide {
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color: border.color.right,
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style: border.style.right.to_border_style(),
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};
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let bottom = webrender_traits::BorderSide {
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color: border.color.bottom,
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style: border.style.bottom.to_border_style(),
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};
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let radius = border.radius.to_border_radius();
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webrender_traits::BorderDetails::Normal(webrender_traits::NormalBorder {
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left: left,
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top: top,
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right: right,
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bottom: bottom,
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radius: radius,
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})
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}
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BorderDetails::Image(ref image) => {
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match image.image.key {
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None => return,
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Some(key) => {
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webrender_traits::BorderDetails::Image(webrender_traits::ImageBorder {
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image_key: key,
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patch: webrender_traits::NinePatchDescriptor {
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width: image.image.width,
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height: image.image.height,
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slice: image.slice,
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},
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outset: image.outset,
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repeat_horizontal: image.repeat_horizontal,
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repeat_vertical: image.repeat_vertical,
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})
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}
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}
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}
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};
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builder.push_border(rect, clip, widths, details);
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}
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DisplayItem::Gradient(ref item) => {
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let rect = item.base.bounds.to_rectf();
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let start_point = item.start_point.to_pointf();
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let end_point = item.end_point.to_pointf();
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let clip = item.base.clip.to_clip_region(builder);
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builder.push_gradient(rect,
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clip,
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start_point,
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end_point,
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item.stops.clone(),
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ExtendMode::Clamp);
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}
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DisplayItem::Line(..) => {
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println!("TODO DisplayItem::Line");
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}
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DisplayItem::BoxShadow(ref item) => {
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let rect = item.base.bounds.to_rectf();
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let box_bounds = item.box_bounds.to_rectf();
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let clip = item.base.clip.to_clip_region(builder);
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builder.push_box_shadow(rect,
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clip,
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box_bounds,
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item.offset.to_pointf(),
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item.color,
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item.blur_radius.to_f32_px(),
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item.spread_radius.to_f32_px(),
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item.border_radius.to_f32_px(),
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item.clip_mode.to_clip_mode());
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}
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DisplayItem::Iframe(ref item) => {
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let rect = item.base.bounds.to_rectf();
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let pipeline_id = item.iframe.to_webrender();
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let clip = item.base.clip.to_clip_region(builder);
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builder.push_iframe(rect, clip, pipeline_id);
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}
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DisplayItem::PushStackingContext(ref item) => {
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let stacking_context = &item.stacking_context;
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debug_assert!(stacking_context.context_type == StackingContextType::Real);
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let clip = builder.new_clip_region(&stacking_context.overflow.to_rectf(),
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vec![],
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None);
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let transform = stacking_context.transform.map(|transform| {
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LayoutTransform::from_untyped(&transform).into()
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});
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let perspective = stacking_context.perspective.map(|perspective| {
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LayoutTransform::from_untyped(&perspective)
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});
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builder.push_stacking_context(stacking_context.scroll_policy,
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stacking_context.bounds.to_rectf(),
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clip,
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stacking_context.z_index,
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transform,
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perspective,
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stacking_context.blend_mode.to_blend_mode(),
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stacking_context.filters.to_filter_ops());
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}
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DisplayItem::PopStackingContext(_) => builder.pop_stacking_context(),
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DisplayItem::PushScrollRoot(ref item) => {
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let clip = builder.new_clip_region(&item.scroll_root.clip.to_rectf(),
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vec![],
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None);
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let provided_id = ScrollLayerId::new(item.scroll_root.id.0, builder.pipeline_id);
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let id = builder.define_clip(clip,
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item.scroll_root.size.to_sizef(),
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Some(provided_id));
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debug_assert!(provided_id == id);
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}
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DisplayItem::PopScrollRoot(_) => {} //builder.pop_scroll_layer(),
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}
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}
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}
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trait WebRenderScrollRootIdConverter {
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fn convert_to_webrender(&self, pipeline_id: webrender_traits::PipelineId) -> ScrollLayerId;
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}
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impl WebRenderScrollRootIdConverter for ScrollRootId {
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fn convert_to_webrender(&self, pipeline_id: webrender_traits::PipelineId) -> ScrollLayerId {
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if *self == ScrollRootId::root() {
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ScrollLayerId::root_scroll_layer(pipeline_id)
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} else {
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ScrollLayerId::new(self.0, pipeline_id)
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}
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}
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}
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