Use raster pipeline for repeat/mirror radial gradients

(reland of https://skia-review.googlesource.com/c/24283/)

The legacy clamp specialization is still faster, but for repeat and
mirror RP wins (at low color stop counts).

Change-Id: I97a77188e912239f31e94600021b469ce7c40797
Reviewed-on: https://skia-review.googlesource.com/24742
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/shaders/gradients/SkRadialGradient.h b/src/shaders/gradients/SkRadialGradient.h
index c0353cf153..f85bc8e53a 100644
--- a/src/shaders/gradients/SkRadialGradient.h
+++ b/src/shaders/gradients/SkRadialGradient.h
@@ -10,7 +10,7 @@
 
 #include "SkGradientShaderPriv.h"
 
-class SkRadialGradient : public SkGradientShaderBase {
+class SkRadialGradient final : public SkGradientShaderBase {
 public:
     SkRadialGradient(const SkPoint& center, SkScalar radius, const Descriptor&);
 
@@ -41,7 +41,9 @@ protected:
     bool adjustMatrixAndAppendStages(SkArenaAlloc* alloc,
                                      SkMatrix* matrix,
                                      SkRasterPipeline* tPipeline,
-                                     SkRasterPipeline* postPipeline) const final;
+                                     SkRasterPipeline* postPipeline) const override;
+
+    bool onIsRasterPipelineOnly() const override;
 
 private:
     const SkPoint fCenter;