Fix alpha contribution to tonal color.

Also adds a tonal color GM, a grayscale mode to shadowutils GM,
and animated alpha to SampleAndroidShadows.

Bug: skia:
Change-Id: I1dcb5cab7e53ffa7a3bf1a07b6ebfed38df1a9ed
Reviewed-on: https://skia-review.googlesource.com/85002
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/samplecode/SampleShadowUtils.cpp b/samplecode/SampleShadowUtils.cpp
index 7e6079156d..7d30a10d0b 100755
--- a/samplecode/SampleShadowUtils.cpp
+++ b/samplecode/SampleShadowUtils.cpp
@@ -121,6 +121,7 @@ protected:
         if (!fShowSpot) {
             spotAlpha = 0;
         }
+        flags |= SkShadowFlags::kDisableTonalColor_ShadowFlag;
         if (fUseAlt) {
             flags |= SkShadowFlags::kGeometricOnly_ShadowFlag;
         }