[skotty,sksg] Initial RRect support

Bug: skia:
Change-Id: I51bf6619e8d857d5d14fcd6651c144bd3c59453f
Reviewed-on: https://skia-review.googlesource.com/90027
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Mike Reed <reed@google.com>
diff --git a/experimental/skotty/Skotty.cpp b/experimental/skotty/Skotty.cpp
index 7a8e9e3..b94cad2 100644
--- a/experimental/skotty/Skotty.cpp
+++ b/experimental/skotty/Skotty.cpp
@@ -21,6 +21,7 @@
 #include "SkSGInvalidationController.h"
 #include "SkSGGroup.h"
 #include "SkSGPath.h"
+#include "SkSGRect.h"
 #include "SkSGTransform.h"
 #include "SkStream.h"
 #include "SkTArray.h"
@@ -79,7 +80,7 @@
 
 sk_sp<sksg::RenderNode> AttachTransform(const Json::Value& t, AttachContext* ctx,
                                         sk_sp<sksg::RenderNode> wrapped_node) {
-    if (!t.isObject())
+    if (!t.isObject() || !wrapped_node)
         return wrapped_node;
 
     auto xform = sk_make_sp<CompositeTransform>(wrapped_node);
@@ -143,6 +144,26 @@
     return path_attached ? path_node : nullptr;
 }
 
+sk_sp<sksg::GeometryNode> AttachRRectGeometry(const Json::Value& jrect, AttachContext* ctx) {
+    SkASSERT(jrect.isObject());
+
+    auto rect_node = sksg::RRect::Make();
+    auto composite = sk_make_sp<CompositeRRect>(rect_node);
+
+    auto p_attached = AttachProperty<VectorValue, SkPoint>(jrect["p"], ctx, composite,
+            [](const sk_sp<CompositeRRect>& node, const SkPoint& pos) { node->setPosition(pos); });
+    auto s_attached = AttachProperty<VectorValue, SkSize>(jrect["s"], ctx, composite,
+            [](const sk_sp<CompositeRRect>& node, const SkSize& sz) { node->setSize(sz); });
+    auto r_attached = AttachProperty<ScalarValue, SkScalar>(jrect["r"], ctx, composite,
+            [](const sk_sp<CompositeRRect>& node, SkScalar radius) { node->setRadius(radius); });
+
+    if (!p_attached && !s_attached && !r_attached) {
+        return nullptr;
+    }
+
+    return rect_node;
+}
+
 sk_sp<sksg::Color> AttachColorPaint(const Json::Value& obj, AttachContext* ctx) {
     SkASSERT(obj.isObject());
 
@@ -205,6 +226,7 @@
 using GeometryAttacherT = sk_sp<sksg::GeometryNode> (*)(const Json::Value&, AttachContext*);
 static constexpr GeometryAttacherT gGeometryAttachers[] = {
     AttachPathGeometry,
+    AttachRRectGeometry,
 };
 
 using PaintAttacherT = sk_sp<sksg::PaintNode> (*)(const Json::Value&, AttachContext*);
@@ -241,6 +263,7 @@
     static constexpr ShapeInfo gShapeInfo[] = {
         { "fl", ShapeType::kPaint    , 0 }, // fill      -> AttachFillPaint
         { "gr", ShapeType::kGroup    , 0 }, // group     -> AttachShapeGroup
+        { "rc", ShapeType::kGeometry , 1 }, // shape     -> AttachRRectGeometry
         { "sh", ShapeType::kGeometry , 0 }, // shape     -> AttachPathGeometry
         { "st", ShapeType::kPaint    , 1 }, // stroke    -> AttachStrokePaint
         { "tr", ShapeType::kTransform, 0 }, // transform -> AttachTransform