[skottie] Add 'rz' rotation support

TBR=

Change-Id: I6dd82e5dc516faac091e5173688d2bc977e4fcaa
Reviewed-on: https://skia-review.googlesource.com/100280
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>

1 files changed, 8 insertions, 1 deletions

diff --git a/experimental/skottie/Skottie.cpp b/experimental/skottie/Skottie.cpp
index 7e56106fc5..efd3d075d7 100644
--- a/experimental/skottie/Skottie.cpp
+++ b/experimental/skottie/Skottie.cpp
@@ -84,7 +84,14 @@ sk_sp<sksg::Matrix> AttachMatrix(const Json::Value& t, AttachContext* ctx,
             [composite](const VectorValue& s) {
                 composite->setScale(ValueTraits<VectorValue>::As<SkVector>(s));
             });
-    auto rotation_attached = BindProperty<ScalarValue>(t["r"], &ctx->fAnimators,
+
+    auto* jrotation = &t["r"];
+    if (jrotation->isNull()) {
+        // 3d rotations have separate rx,ry,rz components.  While we don't fully support them,
+        // we can still make use of rz.
+        jrotation = &t["rz"];
+    }
+    auto rotation_attached = BindProperty<ScalarValue>(*jrotation, &ctx->fAnimators,
             [composite](const ScalarValue& r) {
                 composite->setRotation(r);
             });