2pt conical stage for concentric case

If the circles are concentric, we can use the radial stage and
post-massage t with a 2x3 stage.

Change-Id: I744bc889d509d5f9ff162c179e8ec7ca35410e3c
Reviewed-on: https://skia-review.googlesource.com/20972
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/shaders/gradients/SkTwoPointConicalGradient.h b/src/shaders/gradients/SkTwoPointConicalGradient.h
index b32f52c1e0..8b61b8e9d2 100644
--- a/src/shaders/gradients/SkTwoPointConicalGradient.h
+++ b/src/shaders/gradients/SkTwoPointConicalGradient.h
@@ -79,6 +79,10 @@ protected:
     Context* onMakeContext(const ContextRec&, SkArenaAlloc*) const override;
     sk_sp<SkShader> onMakeColorSpace(SkColorSpaceXformer* xformer) const override;
 
+    bool adjustMatrixAndAppendStages(SkArenaAlloc* alloc,
+                                     SkMatrix* matrix,
+                                     SkRasterPipeline* p) const final;
+
 private:
     SkPoint fCenter1;
     SkPoint fCenter2;