mirror of
https://github.com/servo/servo.git
synced 2025-06-21 15:49:04 +01:00
8c7c5f6e79
This uses floating-point (Layout) coordinates in where possible. Replace NormalBorder struct with WebRender equivalent. Remove ToPointF and ToRectF traits. Convert border RepeatKeyword with ToLayout. Add some definitions to malloc_size_of for WebRender types.
377 lines
16 KiB
Rust
377 lines
16 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 display_list::ToLayout;
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use euclid::Point2D;
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use gfx::display_list::{BorderDetails, BorderRadii, ClipScrollNode};
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use gfx::display_list::{ClipScrollNodeIndex, ClipScrollNodeType, ClippingRegion, DisplayItem};
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use gfx::display_list::{DisplayList, StackingContextType};
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use msg::constellation_msg::PipelineId;
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use webrender_api::{self, ClipAndScrollInfo, ClipId, ClipMode, ComplexClipRegion};
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use webrender_api::{DisplayListBuilder, LayoutTransform};
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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 prim_info(&self) -> webrender_api::LayoutPrimitiveInfo;
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fn convert_to_webrender(
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&self,
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builder: &mut DisplayListBuilder,
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clip_scroll_nodes: &[ClipScrollNode],
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clip_ids: &mut Vec<Option<ClipId>>,
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current_clip_and_scroll_info: &mut ClipAndScrollInfo,
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);
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}
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pub trait ToBorderRadius {
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fn to_border_radius(&self) -> webrender_api::BorderRadius;
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}
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impl ToBorderRadius for BorderRadii<Au> {
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fn to_border_radius(&self) -> webrender_api::BorderRadius {
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webrender_api::BorderRadius {
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top_left: self.top_left.to_layout(),
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top_right: self.top_right.to_layout(),
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bottom_left: self.bottom_left.to_layout(),
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bottom_right: self.bottom_right.to_layout(),
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}
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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 mut builder = DisplayListBuilder::with_capacity(
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pipeline_id.to_webrender(),
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self.bounds().size.to_layout(),
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1024 * 1024,
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); // 1 MB of space
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let mut current_clip_and_scroll_info = pipeline_id.root_clip_and_scroll_info();
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builder.push_clip_and_scroll_info(current_clip_and_scroll_info);
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let mut clip_ids = Vec::with_capacity(self.clip_scroll_nodes.len());
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clip_ids.resize(self.clip_scroll_nodes.len(), None);
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clip_ids[0] = Some(ClipId::root_scroll_node(pipeline_id.to_webrender()));
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for item in &self.list {
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item.convert_to_webrender(
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&mut builder,
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&self.clip_scroll_nodes,
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&mut clip_ids,
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&mut current_clip_and_scroll_info,
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);
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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 prim_info(&self) -> webrender_api::LayoutPrimitiveInfo {
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let tag = match self.base().metadata.pointing {
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Some(cursor) => Some((self.base().metadata.node.0 as u64, cursor as u16)),
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None => None,
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};
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webrender_api::LayoutPrimitiveInfo {
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rect: self.base().bounds.to_layout(),
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local_clip: self.base().local_clip,
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// TODO(gw): Make use of the WR backface visibility functionality.
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is_backface_visible: true,
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tag,
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}
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}
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fn convert_to_webrender(
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&self,
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builder: &mut DisplayListBuilder,
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clip_scroll_nodes: &[ClipScrollNode],
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clip_ids: &mut Vec<Option<ClipId>>,
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current_clip_and_scroll_info: &mut ClipAndScrollInfo,
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) {
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let get_id = |clip_ids: &[Option<ClipId>], index: ClipScrollNodeIndex| -> ClipId {
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match clip_ids[index.0] {
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Some(id) => id,
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None => unreachable!("Tried to use WebRender ClipId before it was defined."),
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}
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};
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let clip_and_scroll_indices = self.base().clipping_and_scrolling;
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let scrolling_id = get_id(clip_ids, clip_and_scroll_indices.scrolling);
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let clip_and_scroll_info = match clip_and_scroll_indices.clipping {
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None => ClipAndScrollInfo::simple(scrolling_id),
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Some(index) => ClipAndScrollInfo::new(scrolling_id, get_id(clip_ids, index)),
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};
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if clip_and_scroll_info != *current_clip_and_scroll_info {
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builder.pop_clip_id();
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builder.push_clip_and_scroll_info(clip_and_scroll_info);
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*current_clip_and_scroll_info = clip_and_scroll_info;
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}
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match *self {
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DisplayItem::SolidColor(ref item) => {
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builder.push_rect(&self.prim_info(), item.color);
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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
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.natural_word_slices_in_visual_order(&item.range)
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{
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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 x = (origin.x + glyph_offset.x).to_f32_px();
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let y = (origin.y + glyph_offset.y).to_f32_px();
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let point = webrender_api::LayoutPoint::new(x, y);
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let glyph = webrender_api::GlyphInstance {
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index: glyph.id(),
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point: point,
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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(
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&self.prim_info(),
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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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None,
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);
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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 > 0.0 && item.stretch_size.height > 0.0 {
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builder.push_image(
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&self.prim_info(),
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item.stretch_size,
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item.tile_spacing,
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item.image_rendering,
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webrender_api::AlphaType::PremultipliedAlpha,
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id,
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);
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}
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}
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},
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DisplayItem::Border(ref item) => {
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let widths = item.border_widths.to_layout();
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let details = match item.details {
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BorderDetails::Normal(ref border) => {
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webrender_api::BorderDetails::Normal(*border)
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},
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BorderDetails::Image(ref image) => match image.image.key {
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None => return,
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Some(key) => {
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webrender_api::BorderDetails::Image(webrender_api::ImageBorder {
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image_key: key,
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patch: webrender_api::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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fill: image.fill,
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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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BorderDetails::Gradient(ref gradient) => {
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webrender_api::BorderDetails::Gradient(webrender_api::GradientBorder {
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gradient: builder.create_gradient(
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gradient.gradient.start_point,
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gradient.gradient.end_point,
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gradient.gradient.stops.clone(),
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gradient.gradient.extend_mode,
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),
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outset: gradient.outset,
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})
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},
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BorderDetails::RadialGradient(ref gradient) => {
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webrender_api::BorderDetails::RadialGradient(
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webrender_api::RadialGradientBorder {
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gradient: builder.create_radial_gradient(
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gradient.gradient.center,
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gradient.gradient.radius,
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gradient.gradient.stops.clone(),
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gradient.gradient.extend_mode,
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),
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outset: gradient.outset,
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},
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)
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},
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};
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builder.push_border(&self.prim_info(), widths, details);
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},
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DisplayItem::Gradient(ref item) => {
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let gradient = builder.create_gradient(
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item.gradient.start_point,
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item.gradient.end_point,
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item.gradient.stops.clone(),
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item.gradient.extend_mode,
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);
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builder.push_gradient(&self.prim_info(), gradient, item.tile, item.tile_spacing);
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},
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DisplayItem::RadialGradient(ref item) => {
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let gradient = builder.create_radial_gradient(
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item.gradient.center,
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item.gradient.radius,
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item.gradient.stops.clone(),
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item.gradient.extend_mode,
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);
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builder.push_radial_gradient(
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&self.prim_info(),
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gradient,
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item.tile,
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item.tile_spacing,
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);
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},
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DisplayItem::Line(ref item) => {
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builder.push_line(
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&self.prim_info(),
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// TODO(gw): Use a better estimate for wavy line thickness.
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(0.33 * item.base.bounds.size.height.to_f32_px()).ceil(),
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webrender_api::LineOrientation::Horizontal,
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&item.color,
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item.style,
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);
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},
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DisplayItem::BoxShadow(ref item) => {
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builder.push_box_shadow(
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&self.prim_info(),
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item.box_bounds,
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item.offset,
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item.color,
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item.blur_radius,
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item.spread_radius,
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item.border_radius.to_border_radius(),
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item.clip_mode,
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);
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},
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DisplayItem::PushTextShadow(ref item) => {
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builder.push_shadow(
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&self.prim_info(),
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webrender_api::Shadow {
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blur_radius: item.blur_radius,
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offset: item.offset,
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color: item.color,
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},
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);
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},
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DisplayItem::PopAllTextShadows(_) => {
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builder.pop_all_shadows();
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},
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DisplayItem::Iframe(ref item) => {
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builder.push_iframe(&self.prim_info(), item.iframe.to_webrender());
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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 transform = stacking_context
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.transform
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.map(|transform| LayoutTransform::from_untyped(&transform).into());
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let perspective = stacking_context
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.perspective
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.map(|perspective| LayoutTransform::from_untyped(&perspective));
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builder.push_stacking_context(
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&webrender_api::LayoutPrimitiveInfo::new(stacking_context.bounds.to_layout()),
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stacking_context.scroll_policy,
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transform,
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stacking_context.transform_style,
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perspective,
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stacking_context.mix_blend_mode,
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stacking_context
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.filters
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.iter()
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.map(ToLayout::to_layout)
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.collect(),
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);
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},
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DisplayItem::PopStackingContext(_) => builder.pop_stacking_context(),
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DisplayItem::DefineClipScrollNode(ref item) => {
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let node = &clip_scroll_nodes[item.node_index.0];
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let parent_id = get_id(clip_ids, node.parent_index);
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let item_rect = node.clip.main.to_layout();
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let webrender_id = match node.node_type {
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ClipScrollNodeType::Clip => builder.define_clip_with_parent(
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node.id,
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parent_id,
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item_rect,
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node.clip.get_complex_clips(),
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None,
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),
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ClipScrollNodeType::ScrollFrame(scroll_sensitivity) => builder
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.define_scroll_frame_with_parent(
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node.id,
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parent_id,
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node.content_rect.to_layout(),
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node.clip.main.to_layout(),
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node.clip.get_complex_clips(),
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None,
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scroll_sensitivity,
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),
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ClipScrollNodeType::StickyFrame(ref sticky_data) => {
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// TODO: Add define_sticky_frame_with_parent to WebRender.
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builder.push_clip_id(parent_id);
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let id = builder.define_sticky_frame(
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node.id,
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item_rect,
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sticky_data.margins,
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sticky_data.vertical_offset_bounds,
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sticky_data.horizontal_offset_bounds,
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webrender_api::LayoutVector2D::zero(),
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);
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builder.pop_clip_id();
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id
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},
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};
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debug_assert!(node.id.is_none() || node.id == Some(webrender_id));
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clip_ids[item.node_index.0] = Some(webrender_id);
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},
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}
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}
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}
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trait ToWebRenderClip {
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fn get_complex_clips(&self) -> Vec<ComplexClipRegion>;
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}
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impl ToWebRenderClip for ClippingRegion {
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fn get_complex_clips(&self) -> Vec<ComplexClipRegion> {
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self.complex
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.iter()
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.map(|complex_clipping_region| {
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ComplexClipRegion::new(
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complex_clipping_region.rect.to_layout(),
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complex_clipping_region.radii.to_border_radius(),
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ClipMode::Clip,
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)
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})
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.collect()
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}
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}
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