compositor: Move WebRender-ish messages and types to `webrender_traits` (#32315)

* Move WebRender related types to `webrender_traits`

This refactor moves several WebRender related types
from `compositing_traits`, `script_traits` and `net_traits`
crates to the `webrender_traits` crate.

This change also moves the `Image` type and associated
function out of `net_traits` and into the `pixels` crate.

Co-authored-by: Martin Robinson <mrobinson@igalia.com>
Signed-off-by: Mukilan Thiyagarajan <mukilan@igalia.com>

* Move `script_traits::WebrenderIpcSender` to `webrender_traits::WebRenderScriptApi`

---------

Signed-off-by: Mukilan Thiyagarajan <mukilan@igalia.com>
Co-authored-by: Martin Robinson <mrobinson@igalia.com>

5 files changed, 9 insertions, 7 deletions

diff --git a/components/layout/Cargo.toml b/components/layout/Cargo.toml
index f63002b5fe3..f7b50524604 100644
--- a/components/layout/Cargo.toml
+++ b/components/layout/Cargo.toml
@@ -30,6 +30,7 @@ log = { workspace = true }
 malloc_size_of = { workspace = true }
 malloc_size_of_derive = { workspace = true }
 net_traits = { workspace = true }
+pixels = { path = "../pixels" }
 parking_lot = { workspace = true }
 profile_traits = { workspace = true }
 range = { path = "../range" }
@@ -50,4 +51,5 @@ style_traits = { workspace = true }
 unicode-bidi = { workspace = true, features = ["with_serde"] }
 unicode-script = { workspace = true }
 webrender_api = { workspace = true }
+webrender_traits = { workspace = true }
 xi-unicode = { workspace = true }
diff --git a/components/layout/display_list/builder.rs b/components/layout/display_list/builder.rs
index 0fba6875d2f..62257e17d8b 100644
--- a/components/layout/display_list/builder.rs
+++ b/components/layout/display_list/builder.rs
@@ -27,7 +27,6 @@ use log::{debug, warn};
 use net_traits::image_cache::UsePlaceholder;
 use range::Range;
 use script_layout_interface::{combine_id_with_fragment_type, FragmentType};
-use script_traits::compositor::ScrollSensitivity;
 use servo_config::opts;
 use servo_geometry::{self, MaxRect};
 use style::color::AbsoluteColor;
@@ -52,6 +51,7 @@ use webrender_api::{
     ExternalScrollId, FilterOp, GlyphInstance, ImageRendering, LineStyle, NinePatchBorder,
     NinePatchBorderSource, NormalBorder, PropertyBinding, StickyOffsetBounds,
 };
+use webrender_traits::display_list::ScrollSensitivity;
 
 use super::StackingContextId;
 use crate::block::BlockFlow;
diff --git a/components/layout/display_list/items.rs b/components/layout/display_list/items.rs
index 6fe14f03143..92117a118df 100644
--- a/components/layout/display_list/items.rs
+++ b/components/layout/display_list/items.rs
@@ -20,8 +20,7 @@ use base::id::PipelineId;
 use base::print_tree::PrintTree;
 use embedder_traits::Cursor;
 use euclid::{SideOffsets2D, Vector2D};
-use net_traits::image::base::Image;
-use script_traits::compositor::{ScrollSensitivity, ScrollTreeNodeId};
+use pixels::Image;
 use serde::Serialize;
 use servo_geometry::MaxRect;
 use style::computed_values::_servo_top_layer::T as InTopLayer;
@@ -33,6 +32,7 @@ use webrender_api::{
     FilterOp, GlyphInstance, GradientStop, ImageKey, MixBlendMode, PrimitiveFlags, Shadow,
     SpatialId, StickyOffsetBounds, TransformStyle,
 };
+use webrender_traits::display_list::{ScrollSensitivity, ScrollTreeNodeId};
 
 use super::StackingContextId;
 
diff --git a/components/layout/display_list/webrender_helpers.rs b/components/layout/display_list/webrender_helpers.rs
index 0ac79b4d8ca..c6c2abfdd34 100644
--- a/components/layout/display_list/webrender_helpers.rs
+++ b/components/layout/display_list/webrender_helpers.rs
@@ -10,15 +10,15 @@
 use base::id::PipelineId;
 use base::WebRenderEpochToU16;
 use log::trace;
-use script_traits::compositor::{
-    CompositorDisplayListInfo, ScrollSensitivity, ScrollTreeNodeId, ScrollableNodeInfo,
-};
 use webrender_api::units::{LayoutPoint, LayoutSize, LayoutVector2D};
 use webrender_api::{
     self, ClipChainId, ClipId, CommonItemProperties, DisplayItem as WrDisplayItem,
     DisplayListBuilder, Epoch, HasScrollLinkedEffect, PrimitiveFlags, PropertyBinding, RasterSpace,
     ReferenceFrameKind, SpaceAndClipInfo, SpatialId, SpatialTreeItemKey,
 };
+use webrender_traits::display_list::{
+    CompositorDisplayListInfo, ScrollSensitivity, ScrollTreeNodeId, ScrollableNodeInfo,
+};
 
 use crate::display_list::items::{
     BaseDisplayItem, ClipScrollNode, ClipScrollNodeType, ClipType, DisplayItem, DisplayList,
diff --git a/components/layout/fragment.rs b/components/layout/fragment.rs
index 171c529babc..7ddcbdb2e6b 100644
--- a/components/layout/fragment.rs
+++ b/components/layout/fragment.rs
@@ -20,8 +20,8 @@ use gfx::text::text_run::{TextRun, TextRunSlice};
 use html5ever::{local_name, namespace_url, ns};
 use ipc_channel::ipc::IpcSender;
 use log::debug;
-use net_traits::image::base::{Image, ImageMetadata};
 use net_traits::image_cache::{ImageOrMetadataAvailable, UsePlaceholder};
+use pixels::{Image, ImageMetadata};
 use range::*;
 use script_layout_interface::wrapper_traits::{
     PseudoElementType, ThreadSafeLayoutElement, ThreadSafeLayoutNode,