Handle missing json resource gracefully in 3dgm

If the json resource is not found (it is not currently packaged with the
APK), Viewer crashes.

TBR=
Change-Id: I0a0bdf7f97fdac8afc84d539c88d2a391e54855c
Reviewed-on: https://skia-review.googlesource.com/134515
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/gm/3dgm.cpp b/gm/3dgm.cpp
index 8014c246d3..a2818bba19 100644
--- a/gm/3dgm.cpp
+++ b/gm/3dgm.cpp
@@ -43,8 +43,9 @@ public:
 
 protected:
     void onOnceBeforeDraw() override {
-        auto stream = GetResourceAsStream("skotty/skotty_sample_2.json");
-        fAnim = skottie::Animation::Make(stream.get());
+        if (auto stream = GetResourceAsStream("skotty/skotty_sample_2.json")) {
+            fAnim = skottie::Animation::Make(stream.get());
+        }
 
         int index = 0;
         for (float x = 0; x <= 1; ++x) {
@@ -99,6 +100,9 @@ protected:
     }
 
     void onDraw(SkCanvas* canvas) override {
+        if (!fAnim) {
+            return;
+        }
         SkMatrix44  camera(SkMatrix44::kIdentity_Constructor),
                     perspective(SkMatrix44::kIdentity_Constructor),
                     mv(SkMatrix44::kIdentity_Constructor);