1 files changed, 58 insertions, 0 deletions
diff --git a/modules/sksg/include/SkSGTrimEffect.h b/modules/sksg/include/SkSGTrimEffect.h
new file mode 100644
index 0000000000..18f15921e7
--- /dev/null
+++ b/modules/sksg/include/SkSGTrimEffect.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkSGTrimEffect_DEFINED
+#define SkSGTrimEffect_DEFINED
+
+#include "SkSGGeometryNode.h"
+
+#include "SkPath.h"
+#include "SkTrimPathEffect.h"
+
+class SkCanvas;
+class SkPaint;
+
+namespace sksg {
+
+/**
+ * Concrete Geometry node, applying a trim effect to its child.
+ */
+class TrimEffect final : public GeometryNode {
+public:
+    static sk_sp<TrimEffect> Make(sk_sp<GeometryNode> child) {
+        return child ? sk_sp<TrimEffect>(new TrimEffect(std::move(child))) : nullptr;
+    }
+
+    ~TrimEffect() override;
+
+    SG_ATTRIBUTE(Start , SkScalar              , fStart )
+    SG_ATTRIBUTE(Stop  , SkScalar              , fStop  )
+    SG_ATTRIBUTE(Mode  , SkTrimPathEffect::Mode, fMode  )
+
+protected:
+    void onClip(SkCanvas*, bool antiAlias) const override;
+    void onDraw(SkCanvas*, const SkPaint&) const override;
+
+    SkRect onRevalidate(InvalidationController*, const SkMatrix&) override;
+    SkPath onAsPath() const override;
+
+private:
+    explicit TrimEffect(sk_sp<GeometryNode>);
+
+    const sk_sp<GeometryNode> fChild;
+
+    SkPath                    fTrimmedPath;
+    SkScalar                  fStart = 0,
+                              fStop  = 1;
+    SkTrimPathEffect::Mode    fMode  = SkTrimPathEffect::Mode::kNormal;
+
+    using INHERITED = GeometryNode;
+};
+
+} // namespace sksg
+
+#endif // SkSGTrimEffect_DEFINED