Use typed transforms in stacking contexts

components/gfx/display_list/mod.rs

@@ -14,7 +14,7 @@
 //! They are therefore not exactly analogous to constructs like Skia pictures, which consist of
 //! low-level drawing primitives.
 
-use euclid::{Transform3D, Vector2D, TypedRect, SideOffsets2D};
+use euclid::{Vector2D, TypedRect, SideOffsets2D};
 use euclid::num::{One, Zero};
 use gfx_traits::{self, StackingContextId};
 use gfx_traits::print_tree::PrintTree;
@@ -33,8 +33,8 @@ use text::glyph::ByteIndex;
 use webrender_api::{BorderRadius, BorderWidths, BoxShadowClipMode, ClipMode, ColorF};
 use webrender_api::{ComplexClipRegion, ExtendMode, ExternalScrollId, FilterOp, FontInstanceKey};
 use webrender_api::{GlyphInstance, GradientStop, ImageBorder, ImageKey, ImageRendering};
-use webrender_api::{LayoutPoint, LayoutRect, LayoutSize, LayoutVector2D, LineStyle, LocalClip};
-use webrender_api::{MixBlendMode, NormalBorder, ScrollPolicy, ScrollSensitivity};
+use webrender_api::{LayoutPoint, LayoutRect, LayoutSize, LayoutTransform, LayoutVector2D, LineStyle};
+use webrender_api::{LocalClip, MixBlendMode, NormalBorder, ScrollPolicy, ScrollSensitivity};
 use webrender_api::{StickyOffsetBounds, TransformStyle};
 
 pub use style::dom::OpaqueNode;
@@ -209,13 +209,13 @@ pub struct StackingContext {
     pub mix_blend_mode: MixBlendMode,
 
     /// A transform to be applied to this stacking context.
-    pub transform: Option<Transform3D<f32>>,
+    pub transform: Option<LayoutTransform>,
 
     /// The transform style of this stacking context.
     pub transform_style: TransformStyle,
 
     /// The perspective matrix to be applied to children.
-    pub perspective: Option<Transform3D<f32>>,
+    pub perspective: Option<LayoutTransform>,
 
     /// The scroll policy of this layer.
     pub scroll_policy: ScrollPolicy,
@@ -234,9 +234,9 @@ impl StackingContext {
                z_index: i32,
                filters: Vec<FilterOp>,
                mix_blend_mode: MixBlendMode,
-               transform: Option<Transform3D<f32>>,
+               transform: Option<LayoutTransform>,
                transform_style: TransformStyle,
-               perspective: Option<Transform3D<f32>>,
+               perspective: Option<LayoutTransform>,
                scroll_policy: ScrollPolicy,
                parent_clipping_and_scrolling: ClippingAndScrolling)
                -> StackingContext {
@@ -1028,7 +1028,7 @@ pub trait SimpleMatrixDetection {
     fn is_identity_or_simple_translation(&self) -> bool;
 }
 
-impl SimpleMatrixDetection for Transform3D<f32> {
+impl SimpleMatrixDetection for LayoutTransform {
     #[inline]
     fn is_identity_or_simple_translation(&self) -> bool {
         let (_0, _1) = (Zero::zero(), One::one());

components/layout/display_list/builder.rs

@@ -17,7 +17,7 @@ use context::LayoutContext;
 use display_list::ToLayout;
 use display_list::background::{compute_background_image_size, tile_image_axis};
 use display_list::background::{convert_linear_gradient, convert_radial_gradient};
-use euclid::{Point2D, Rect, SideOffsets2D, Size2D, Transform3D, TypedSize2D, Vector2D, rect};
+use euclid::{rect, Point2D, Rect, SideOffsets2D, Size2D, TypedSize2D, Vector2D};
 use flex::FlexFlow;
 use flow::{BaseFlow, Flow, FlowFlags};
 use flow_ref::FlowRef;
@@ -76,9 +76,9 @@ use style_traits::cursor::CursorKind;
 use table_cell::CollapsedBordersForCell;
 use webrender_api::{self, BorderRadius, BorderSide, BoxShadowClipMode, ClipMode, ColorF};
 use webrender_api::{ComplexClipRegion, ExternalScrollId, FilterOp, GlyphInstance, ImageBorder};
-use webrender_api::{ImageRendering, LayoutRect, LayoutSize, LayoutVector2D, LineStyle, LocalClip};
-use webrender_api::{NinePatchDescriptor, NormalBorder, ScrollPolicy, ScrollSensitivity};
-use webrender_api::StickyOffsetBounds;
+use webrender_api::{ImageRendering, LayoutRect, LayoutSize, LayoutTransform, LayoutVector2D};
+use webrender_api::{LineStyle, LocalClip, NinePatchDescriptor, NormalBorder, ScrollPolicy};
+use webrender_api::{ScrollSensitivity, StickyOffsetBounds};
 
 trait ResolvePercentage {
     fn resolve(&self, length: u32) -> u32;
@@ -2464,7 +2464,7 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
 
         let perspective = self.fragment
             .perspective_matrix(&border_box)
-            .unwrap_or_else(Transform3D::identity);
+            .unwrap_or(LayoutTransform::identity());
         let transform = transform.pre_mul(&perspective).inverse();
 
         let origin = &border_box.origin;
@@ -2766,10 +2766,8 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
         let content_size = self.base.overflow.scroll.origin + self.base.overflow.scroll.size;
         let content_size = Size2D::new(content_size.x, content_size.y);
 
-        let external_id = ExternalScrollId(
-            self.fragment.unique_id(),
-            state.pipeline_id.to_webrender()
-        );
+        let external_id =
+            ExternalScrollId(self.fragment.unique_id(), state.pipeline_id.to_webrender());
         let new_clip_scroll_index = state.add_clip_scroll_node(ClipScrollNode {
             parent_index: self.clipping_and_scrolling().scrolling,
             clip: clip,

components/layout/display_list/webrender_helpers.rs

@@ -11,8 +11,7 @@ use gfx::display_list::{BorderDetails, ClipScrollNode};
 use gfx::display_list::{ClipScrollNodeIndex, ClipScrollNodeType, DisplayItem};
 use gfx::display_list::{DisplayList, StackingContextType};
 use msg::constellation_msg::PipelineId;
-use webrender_api::{self, ClipAndScrollInfo, ClipId};
-use webrender_api::{DisplayListBuilder, LayoutTransform};
+use webrender_api::{self, ClipAndScrollInfo, ClipId, DisplayListBuilder};
 
 pub trait WebRenderDisplayListConverter {
     fn convert_to_webrender(&self, pipeline_id: PipelineId) -> DisplayListBuilder;
@@ -224,19 +223,12 @@ impl WebRenderDisplayItemConverter for DisplayItem {
                 let stacking_context = &item.stacking_context;
                 debug_assert_eq!(stacking_context.context_type, StackingContextType::Real);
 
-                let transform = stacking_context
-                    .transform
-                    .map(|transform| LayoutTransform::from_untyped(&transform).into());
-                let perspective = stacking_context
-                    .perspective
-                    .map(|perspective| LayoutTransform::from_untyped(&perspective));
-
                 builder.push_stacking_context(
                     &webrender_api::LayoutPrimitiveInfo::new(stacking_context.bounds),
                     stacking_context.scroll_policy,
-                    transform,
+                    stacking_context.transform.map(Into::into),
                     stacking_context.transform_style,
-                    perspective,
+                    stacking_context.perspective,
                     stacking_context.mix_blend_mode,
                     stacking_context.filters.clone(),
                 );

components/layout/flow.rs

@@ -29,7 +29,7 @@ use app_units::Au;
 use block::{BlockFlow, FormattingContextType};
 use context::LayoutContext;
 use display_list::{DisplayListBuildState, StackingContextCollectionState};
-use euclid::{Transform3D, Point2D, Vector2D, Rect, Size2D};
+use euclid::{Point2D, Vector2D, Rect, Size2D};
 use flex::FlexFlow;
 use floats::{Floats, SpeculatedFloatPlacement};
 use flow_list::{FlowList, FlowListIterator, MutFlowListIterator};
@@ -67,6 +67,7 @@ use table_colgroup::TableColGroupFlow;
 use table_row::TableRowFlow;
 use table_rowgroup::TableRowGroupFlow;
 use table_wrapper::TableWrapperFlow;
+use webrender_api::LayoutTransform;
 
 /// This marker trait indicates that a type is a struct with `#[repr(C)]` whose first field
 /// is of type `BaseFlow` or some type that also implements this trait.
@@ -335,8 +336,8 @@ pub trait Flow: HasBaseFlow + fmt::Debug + Sync + Send + 'static {
         let transform_2d = self.as_block()
                                .fragment
                                .transform_matrix(&position)
-                               .unwrap_or(Transform3D::identity())
-                               .to_2d();
+                               .unwrap_or(LayoutTransform::identity())
+                               .to_2d().to_untyped();
         let transformed_overflow = Overflow {
             paint: f32_rect_to_au_rect(transform_2d.transform_rect(
                                        &au_rect_to_f32_rect(overflow.paint))),

components/layout/fragment.rs

@@ -10,7 +10,8 @@ use ServoArc;
 use app_units::Au;
 use canvas_traits::canvas::CanvasMsg;
 use context::{LayoutContext, with_thread_local_font_context};
-use euclid::{Transform3D, Point2D, Vector2D, Rect, Size2D};
+use display_list::ToLayout;
+use euclid::{Point2D, Vector2D, Rect, Size2D};
 use floats::ClearType;
 use flow::{GetBaseFlow, ImmutableFlowUtils};
 use flow_ref::FlowRef;
@@ -65,7 +66,7 @@ use style::values::generics::box_::VerticalAlign;
 use style::values::generics::transform;
 use text;
 use text::TextRunScanner;
-use webrender_api;
+use webrender_api::{self, LayoutTransform};
 use wrapper::ThreadSafeLayoutNodeHelpers;
 
 // From gfxFontConstants.h in Firefox.
@@ -2867,9 +2868,10 @@ impl Fragment {
     }
 
     /// Returns the 4D matrix representing this fragment's transform.
-    pub fn transform_matrix(&self, stacking_relative_border_box: &Rect<Au>) -> Option<Transform3D<f32>> {
+    pub fn transform_matrix(&self, stacking_relative_border_box: &Rect<Au>) -> Option<LayoutTransform> {
         let list = &self.style.get_box().transform;
-        let transform = list.to_transform_3d_matrix(Some(stacking_relative_border_box)).ok()?.0;
+        let transform = LayoutTransform::from_untyped(
+            &list.to_transform_3d_matrix(Some(stacking_relative_border_box)).ok()?.0);
 
         let transform_origin = &self.style.get_box().transform_origin;
         let transform_origin_x =
@@ -2882,38 +2884,42 @@ impl Fragment {
                 .to_f32_px();
         let transform_origin_z = transform_origin.depth.px();
 
-        let pre_transform = Transform3D::create_translation(transform_origin_x,
-                                                            transform_origin_y,
-                                                            transform_origin_z);
-        let post_transform = Transform3D::create_translation(-transform_origin_x,
-                                                             -transform_origin_y,
-                                                             -transform_origin_z);
+        let pre_transform = LayoutTransform::create_translation(
+            transform_origin_x,
+            transform_origin_y,
+            transform_origin_z);
+        let post_transform = LayoutTransform::create_translation(
+            -transform_origin_x,
+            -transform_origin_y,
+            -transform_origin_z);
 
         Some(pre_transform.pre_mul(&transform).pre_mul(&post_transform))
     }
 
     /// Returns the 4D matrix representing this fragment's perspective.
-    pub fn perspective_matrix(&self, stacking_relative_border_box: &Rect<Au>) -> Option<Transform3D<f32>> {
+    pub fn perspective_matrix(&self, stacking_relative_border_box: &Rect<Au>) -> Option<LayoutTransform> {
         match self.style().get_box().perspective {
             Either::First(length) => {
                 let perspective_origin = self.style().get_box().perspective_origin;
                 let perspective_origin =
                     Point2D::new(
                         perspective_origin.horizontal
-                            .to_used_value(stacking_relative_border_box.size.width)
-                            .to_f32_px(),
+                            .to_used_value(stacking_relative_border_box.size.width),
                         perspective_origin.vertical
                             .to_used_value(stacking_relative_border_box.size.height)
-                            .to_f32_px());
-
-                let pre_transform = Transform3D::create_translation(perspective_origin.x,
-                                                                    perspective_origin.y,
-                                                                    0.0);
-                let post_transform = Transform3D::create_translation(-perspective_origin.x,
-                                                                     -perspective_origin.y,
-                                                                     0.0);
-
-                let perspective_matrix = transform::create_perspective_matrix(length.px());
+                    ).to_layout();
+
+                let pre_transform = LayoutTransform::create_translation(
+                    perspective_origin.x,
+                    perspective_origin.y,
+                    0.0);
+                let post_transform = LayoutTransform::create_translation(
+                    -perspective_origin.x,
+                    -perspective_origin.y,
+                    0.0);
+
+                let perspective_matrix = LayoutTransform::from_untyped(
+                    &transform::create_perspective_matrix(length.px()));
 
                 Some(pre_transform.pre_mul(&perspective_matrix).pre_mul(&post_transform))
             }

components/layout/sequential.rs

@@ -17,6 +17,7 @@ use servo_config::opts;
 use style::servo::restyle_damage::ServoRestyleDamage;
 use traversal::{AssignBSizes, AssignISizes, BubbleISizes, BuildDisplayList};
 use traversal::{InorderFlowTraversal, PostorderFlowTraversal, PreorderFlowTraversal};
+use webrender_api::LayoutPoint;
 
 pub fn resolve_generated_content(root: &mut Flow, layout_context: &LayoutContext) {
     ResolveGeneratedContent::new(&layout_context).traverse(root, 0);
@@ -98,7 +99,7 @@ pub fn iterate_through_flow_tree_fragment_border_boxes(root: &mut Flow, iterator
                 if let Some(matrix) = kid.as_block()
                        .fragment
                        .transform_matrix(&relative_position) {
-                    let transform_matrix = matrix.transform_point2d(&Point2D::zero());
+                    let transform_matrix = matrix.transform_point2d(&LayoutPoint::zero());
                     stacking_context_position = stacking_context_position +
                                                 Vector2D::new(Au::from_f32_px(transform_matrix.x),
                                                               Au::from_f32_px(transform_matrix.y))