check for gl-canvas before calling GL
git-svn-id: http://skia.googlecode.com/svn/trunk@480 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleTestGL.cpp b/samplecode/SampleTestGL.cpp
index 04e47b6..c5938ba 100644
--- a/samplecode/SampleTestGL.cpp
+++ b/samplecode/SampleTestGL.cpp
@@ -202,9 +202,11 @@
virtual void onDraw(SkCanvas* canvas) {
drawBG(canvas);
-
- test_glshader(canvas);
- return;
+
+ if (canvas->getViewport(NULL)) {
+ test_glshader(canvas);
+ return;
+ }
SkRect r;
r.set(0, 0, 100, 100);