Add alpha support to skia_svg_render example.

examples/skia_svg_render.cc

@@ -25,7 +25,7 @@ int main(int argc, char *argv[]) {
     }
 
     SkImageInfo imgInfo = SkImageInfo::Make(
-        width, height, kBGRA_8888_SkColorType, kOpaque_SkAlphaType);
+        width, height, kRGBA_8888_SkColorType, kPremul_SkAlphaType);
 
     size_t size = width * height * 4;
     uint8_t *buffer = new uint8_t[size];
@@ -37,7 +37,7 @@ int main(int argc, char *argv[]) {
         return 1;
     }
 
-    canvas->clear(SkColors::kWhite);
+    //canvas->clear(SkColors::kWhite);
 
     auto fDom = SkSVGDOM::MakeFromStream(svgStream);
     fDom->setContainerSize(SkSize::Make(width, height));