Revert "Delete SkGaussianEdgeShader"

This reverts commit 64790a3714467300848971aa153aca8cea91cf7b.

Reason for revert: pending Android fix merge.

Original change's description:
> Delete SkGaussianEdgeShader
> 
> No longer used.
> 
> Change-Id: I65a61696060ca19f528066ea587e140798450e36
> Reviewed-on: https://skia-review.googlesource.com/18132
> Reviewed-by: Jim Van Verth <jvanverth@google.com>
> Commit-Queue: Florin Malita <fmalita@chromium.org>
> 

TBR=jvanverth@google.com,fmalita@chromium.org,reed@google.com
No-Presubmit: true
No-Tree-Checks: true
No-Try: true

Change-Id: I88a428e942c78b1fc8e70501ba7fdda5727b2ab2
Reviewed-on: https://skia-review.googlesource.com/18156
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>

1 files changed, 16 insertions, 1 deletions

diff --git a/gm/reveal.cpp b/gm/reveal.cpp
index a793b2da54..3e465556ad 100644
--- a/gm/reveal.cpp
+++ b/gm/reveal.cpp
@@ -9,6 +9,7 @@
 #include "sk_tool_utils.h"
 #include "SkAnimTimer.h"
 #include "SkBlurMaskFilter.h"
+#include "SkGaussianEdgeShader.h"
 #include "SkRRectsGaussianEdgeMaskFilter.h"
 #include "SkPath.h"
 #include "SkPathOps.h"
@@ -313,6 +314,7 @@ namespace skiagm {
 class RevealGM : public GM {
 public:
     enum Mode {
+        kGaussianEdge_Mode,
         kBlurMask_Mode,
         kRRectsGaussianEdge_Mode,
 
@@ -384,7 +386,20 @@ protected:
 
                 // The goal is to replace this clipped draw (which clips the 
                 // shadow) with a draw using the geometric clip
-                if (kBlurMask_Mode == fMode) {
+                if (kGaussianEdge_Mode == fMode) {
+                    canvas->save();
+                        clipObj->clip(canvas);
+
+                        // Draw with GaussianEdgeShader
+                        SkPaint paint;
+                        paint.setAntiAlias(true);
+                        // G channel is an F6.2 radius
+                        int iBlurRad = (int)(4.0f * fBlurRadius);
+                        paint.setColor(SkColorSetARGB(255, iBlurRad >> 8, iBlurRad & 0xFF, 0));
+                        paint.setShader(SkGaussianEdgeShader::Make());
+                        drawObj->draw(canvas, paint);
+                    canvas->restore();
+                } else if (kBlurMask_Mode == fMode) {
                     SkPath clippedPath;
 
                     SkScalar sigma = fBlurRadius / 4.0f;