Revert[7] "replace SkXfermode obj with SkBlendMode enum in paints"

This reverts commit Ib4a154cdd5f5d1dcac921ef50d53b79a2d6a1be8.

Reason for revert: new assert from 100K bot

Original change's description:
> Revert[6] "replace SkXfermode obj with SkBlendMode enum in paints"
> 
> - perform version check in CreateProc for XfermodeImageFilter and ArithmeticImageFilter
> This reverts commit 3ed485f4249e17abb4b11f5018d03175fd1afb44.
> 
> BUG=skia:
> 
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2992
> 
> Change-Id: Ib4a154cdd5f5d1dcac921ef50d53b79a2d6a1be8
> Reviewed-on: https://skia-review.googlesource.com/2992
> Reviewed-by: Mike Reed <reed@google.com>
> Commit-Queue: Mike Reed <reed@google.com>
> 

TBR=reed@google.com,reviews@skia.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: I848e5a69c5cd67f2c14889f4f0a346652578c4ff
Reviewed-on: https://skia-review.googlesource.com/3023
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Reed <reed@google.com>

1 files changed, 18 insertions, 17 deletions

diff --git a/samplecode/SampleAARectModes.cpp b/samplecode/SampleAARectModes.cpp
index 0a50303935..65b1da1405 100644
--- a/samplecode/SampleAARectModes.cpp
+++ b/samplecode/SampleAARectModes.cpp
@@ -12,21 +12,21 @@
 #include "SkShader.h"
 
 static const struct {
-    SkBlendMode fMode;
-    const char* fLabel;
+    SkXfermode::Mode  fMode;
+    const char*         fLabel;
 } gModes[] = {
-    { SkBlendMode::kClear,    "Clear"     },
-    { SkBlendMode::kSrc,      "Src"       },
-    { SkBlendMode::kDst,      "Dst"       },
-    { SkBlendMode::kSrcOver,  "SrcOver"   },
-    { SkBlendMode::kDstOver,  "DstOver"   },
-    { SkBlendMode::kSrcIn,    "SrcIn"     },
-    { SkBlendMode::kDstIn,    "DstIn"     },
-    { SkBlendMode::kSrcOut,   "SrcOut"    },
-    { SkBlendMode::kDstOut,   "DstOut"    },
-    { SkBlendMode::kSrcATop,  "SrcATop"   },
-    { SkBlendMode::kDstATop,  "DstATop"   },
-    { SkBlendMode::kXor,      "Xor"       },
+    { SkXfermode::kClear_Mode,    "Clear"     },
+    { SkXfermode::kSrc_Mode,      "Src"       },
+    { SkXfermode::kDst_Mode,      "Dst"       },
+    { SkXfermode::kSrcOver_Mode,  "SrcOver"   },
+    { SkXfermode::kDstOver_Mode,  "DstOver"   },
+    { SkXfermode::kSrcIn_Mode,    "SrcIn"     },
+    { SkXfermode::kDstIn_Mode,    "DstIn"     },
+    { SkXfermode::kSrcOut_Mode,   "SrcOut"    },
+    { SkXfermode::kDstOut_Mode,   "DstOut"    },
+    { SkXfermode::kSrcATop_Mode,  "SrcATop"   },
+    { SkXfermode::kDstATop_Mode,  "DstATop"   },
+    { SkXfermode::kXor_Mode,      "Xor"       },
 };
 
 const int gWidth = 64;
@@ -34,7 +34,7 @@ const int gHeight = 64;
 const SkScalar W = SkIntToScalar(gWidth);
 const SkScalar H = SkIntToScalar(gHeight);
 
-static SkScalar drawCell(SkCanvas* canvas, SkBlendMode mode, SkAlpha a0, SkAlpha a1) {
+static SkScalar drawCell(SkCanvas* canvas, const sk_sp<SkXfermode>& mode, SkAlpha a0, SkAlpha a1) {
     SkPaint paint;
     paint.setAntiAlias(true);
 
@@ -47,7 +47,7 @@ static SkScalar drawCell(SkCanvas* canvas, SkBlendMode mode, SkAlpha a0, SkAlpha
 
     paint.setColor(SK_ColorRED);
     paint.setAlpha(a1);
-    paint.setBlendMode(mode);
+    paint.setXfermode(mode);
 
     SkScalar offset = SK_Scalar1 / 3;
     SkRect rect = SkRect::MakeXYWH(W / 4 + offset,
@@ -106,10 +106,11 @@ protected:
                     canvas->translate(W * 5, 0);
                     canvas->save();
                 }
+                sk_sp<SkXfermode> mode = SkXfermode::Make(gModes[i].fMode);
 
                 canvas->drawRect(bounds, fBGPaint);
                 canvas->saveLayer(&bounds, nullptr);
-                SkScalar dy = drawCell(canvas, gModes[i].fMode, gAlphaValue[alpha & 1],
+                SkScalar dy = drawCell(canvas, mode, gAlphaValue[alpha & 1],
                                        gAlphaValue[alpha & 2]);
                 canvas->restore();