1 files changed, 127 insertions, 0 deletions
diff --git a/third_party/rust/dwrote/src/geometry_sink_impl.rs b/third_party/rust/dwrote/src/geometry_sink_impl.rs
new file mode 100644
index 0000000000..2f2f7550a2
--- /dev/null
+++ b/third_party/rust/dwrote/src/geometry_sink_impl.rs
@@ -0,0 +1,127 @@
+#![allow(non_snake_case, non_upper_case_globals)]
+
+use std::mem;
+use std::slice;
+use std::sync::atomic::AtomicUsize;
+use winapi::shared::guiddef::REFIID;
+use winapi::shared::minwindef::{UINT, ULONG};
+use winapi::shared::winerror::S_OK;
+use winapi::um::d2d1::{ID2D1SimplifiedGeometrySink, ID2D1SimplifiedGeometrySinkVtbl};
+use winapi::um::d2d1::{D2D1_BEZIER_SEGMENT, D2D1_FIGURE_BEGIN, D2D1_FIGURE_END};
+use winapi::um::d2d1::{D2D1_FIGURE_END_CLOSED, D2D1_FILL_MODE, D2D1_PATH_SEGMENT, D2D1_POINT_2F};
+use winapi::um::unknwnbase::{IUnknown, IUnknownVtbl};
+use winapi::um::winnt::HRESULT;
+
+use crate::com_helpers::Com;
+use crate::outline_builder::OutlineBuilder;
+
+static GEOMETRY_SINK_VTBL: ID2D1SimplifiedGeometrySinkVtbl = ID2D1SimplifiedGeometrySinkVtbl {
+    parent: implement_iunknown!(static ID2D1SimplifiedGeometrySink, GeometrySinkImpl),
+    BeginFigure: GeometrySinkImpl_BeginFigure,
+    EndFigure: GeometrySinkImpl_EndFigure,
+    AddLines: GeometrySinkImpl_AddLines,
+    AddBeziers: GeometrySinkImpl_AddBeziers,
+    Close: GeometrySinkImpl_Close,
+    SetFillMode: GeometrySinkImpl_SetFillMode,
+    SetSegmentFlags: GeometrySinkImpl_SetSegmentFlags,
+};
+
+#[repr(C)]
+pub struct GeometrySinkImpl {
+    // NB: This must be the first field.
+    _refcount: AtomicUsize,
+    outline_builder: Box<dyn OutlineBuilder>,
+}
+
+impl Com<ID2D1SimplifiedGeometrySink> for GeometrySinkImpl {
+    type Vtbl = ID2D1SimplifiedGeometrySinkVtbl;
+    #[inline]
+    fn vtbl() -> &'static ID2D1SimplifiedGeometrySinkVtbl {
+        &GEOMETRY_SINK_VTBL
+    }
+}
+
+impl Com<IUnknown> for GeometrySinkImpl {
+    type Vtbl = IUnknownVtbl;
+    #[inline]
+    fn vtbl() -> &'static IUnknownVtbl {
+        &GEOMETRY_SINK_VTBL.parent
+    }
+}
+
+impl GeometrySinkImpl {
+    pub fn new(outline_builder: Box<dyn OutlineBuilder>) -> GeometrySinkImpl {
+        GeometrySinkImpl {
+            _refcount: AtomicUsize::new(1),
+            outline_builder,
+        }
+    }
+}
+
+unsafe extern "system" fn GeometrySinkImpl_BeginFigure(
+    this: *mut ID2D1SimplifiedGeometrySink,
+    start_point: D2D1_POINT_2F,
+    _: D2D1_FIGURE_BEGIN,
+) {
+    let this = GeometrySinkImpl::from_interface(this);
+    (*this)
+        .outline_builder
+        .move_to(start_point.x, start_point.y)
+}
+
+unsafe extern "system" fn GeometrySinkImpl_EndFigure(
+    this: *mut ID2D1SimplifiedGeometrySink,
+    figure_end: D2D1_FIGURE_END,
+) {
+    let this = GeometrySinkImpl::from_interface(this);
+    if figure_end == D2D1_FIGURE_END_CLOSED {
+        (*this).outline_builder.close()
+    }
+}
+
+unsafe extern "system" fn GeometrySinkImpl_AddLines(
+    this: *mut ID2D1SimplifiedGeometrySink,
+    points: *const D2D1_POINT_2F,
+    points_count: UINT,
+) {
+    let this = GeometrySinkImpl::from_interface(this);
+    let points = slice::from_raw_parts(points, points_count as usize);
+    for point in points {
+        (*this).outline_builder.line_to(point.x, point.y)
+    }
+}
+
+unsafe extern "system" fn GeometrySinkImpl_AddBeziers(
+    this: *mut ID2D1SimplifiedGeometrySink,
+    beziers: *const D2D1_BEZIER_SEGMENT,
+    beziers_count: UINT,
+) {
+    let this = GeometrySinkImpl::from_interface(this);
+    let beziers = slice::from_raw_parts(beziers, beziers_count as usize);
+    for bezier in beziers {
+        (*this).outline_builder.curve_to(
+            bezier.point1.x,
+            bezier.point1.y,
+            bezier.point2.x,
+            bezier.point2.y,
+            bezier.point3.x,
+            bezier.point3.y,
+        )
+    }
+}
+
+unsafe extern "system" fn GeometrySinkImpl_Close(_: *mut ID2D1SimplifiedGeometrySink) -> HRESULT {
+    S_OK
+}
+
+unsafe extern "system" fn GeometrySinkImpl_SetFillMode(
+    _: *mut ID2D1SimplifiedGeometrySink,
+    _: D2D1_FILL_MODE,
+) {
+}
+
+unsafe extern "system" fn GeometrySinkImpl_SetSegmentFlags(
+    _: *mut ID2D1SimplifiedGeometrySink,
+    _: D2D1_PATH_SEGMENT,
+) {
+}