Use the 4f impl for legacy/8888 linear gradients

This is a partial revert of https://skia-review.googlesource.com/c/20280,
adding back L32 support for 4f gradients and switching off the legacy
impl.

If it sticks, we should be able to completely delete the legacy gradient
code.

Change-Id: Iaa6d722ea4dfd8e4d959bb76eca815a30ca7098f
Reviewed-on: https://skia-review.googlesource.com/31425
Reviewed-by: Herb Derby <herb@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>

1 files changed, 6 insertions, 5 deletions

diff --git a/src/shaders/gradients/Sk4fLinearGradient.h b/src/shaders/gradients/Sk4fLinearGradient.h
index 11606e1c80..27c14e0637 100644
--- a/src/shaders/gradients/Sk4fLinearGradient.h
+++ b/src/shaders/gradients/Sk4fLinearGradient.h
@@ -16,19 +16,20 @@ LinearGradient4fContext final : public GradientShaderBase4fContext {
 public:
     LinearGradient4fContext(const SkLinearGradient&, const ContextRec&);
 
+    void shadeSpan(int x, int y, SkPMColor dst[], int count) override;
     void shadeSpan4f(int x, int y, SkPM4f dst[], int count) override;
 
 private:
     using INHERITED = GradientShaderBase4fContext;
 
-    template<ApplyPremul, TileMode>
+    template<typename dstType, ApplyPremul, TileMode>
     class LinearIntervalProcessor;
 
-    template <ApplyPremul premul>
-    void shadePremulSpan(int x, int y, SkPM4f[], int count) const;
+    template <typename dstType, ApplyPremul premul>
+    void shadePremulSpan(int x, int y, dstType dst[], int count, float bias0, float bias1) const;
 
-    template <ApplyPremul premul, SkShader::TileMode tileMode>
-    void shadeSpanInternal(int x, int y, SkPM4f[], int count) const;
+    template <typename dstType, ApplyPremul premul, SkShader::TileMode tileMode>
+    void shadeSpanInternal(int x, int y, dstType dst[], int count, float bias0, float bias1) const;
 
     const Sk4fGradientInterval* findInterval(SkScalar fx) const;