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, 32 insertions, 19 deletions

diff --git a/samplecode/SampleXfermodesBlur.cpp b/samplecode/SampleXfermodesBlur.cpp
index fe07c9b567..ef25114cf0 100644
--- a/samplecode/SampleXfermodesBlur.cpp
+++ b/samplecode/SampleXfermodesBlur.cpp
@@ -37,7 +37,8 @@ class XfermodesBlurView : public SampleView {
     SkBitmap    fBG;
     SkBitmap    fSrcB, fDstB;
 
-    void draw_mode(SkCanvas* canvas, SkBlendMode mode, int alpha, SkScalar x, SkScalar y) {
+    void draw_mode(SkCanvas* canvas, sk_sp<SkXfermode> mode, int alpha,
+                   SkScalar x, SkScalar y) {
         SkPaint p;
         p.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
                                                SkBlurMask::ConvertRadiusToSigma(5),
@@ -54,7 +55,7 @@ class XfermodesBlurView : public SampleView {
         r.offset(x, y);
         canvas->drawOval(r, p);
 
-        p.setBlendMode(mode);
+        p.setXfermode(std::move(mode));
 
         // draw a square overlapping the circle
         // in the lower right of the canvas
@@ -109,23 +110,34 @@ protected:
         }
 
         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"       },
-
-            { SkBlendMode::kPlus,     "Plus"          },
+            { 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"       },
+
+            { SkXfermode::kPlus_Mode,         "Plus"          },
+            /*{ SkXfermode::kModulate_Mode,     "Modulate"      },
+            { SkXfermode::kScreen_Mode,       "Screen"        },
+            { SkXfermode::kOverlay_Mode,      "Overlay"       },
+            { SkXfermode::kDarken_Mode,       "Darken"        },
+            { SkXfermode::kLighten_Mode,      "Lighten"       },
+            { SkXfermode::kColorDodge_Mode,   "ColorDodge"    },
+            { SkXfermode::kColorBurn_Mode,    "ColorBurn"     },
+            { SkXfermode::kHardLight_Mode,    "HardLight"     },
+            { SkXfermode::kSoftLight_Mode,    "SoftLight"     },
+            { SkXfermode::kDifference_Mode,   "Difference"    },
+            { SkXfermode::kExclusion_Mode,    "Exclusion"     },*/
         };
 
         const SkScalar w = SkIntToScalar(W);
@@ -156,7 +168,8 @@ protected:
                 canvas->drawRect(r, p);
 
                 canvas->saveLayer(&r, nullptr);
-                draw_mode(canvas, gModes[i].fMode, twice ? 0x88 : 0xFF, r.fLeft, r.fTop);
+                draw_mode(canvas, SkXfermode::Make(gModes[i].fMode),
+                          twice ? 0x88 : 0xFF, r.fLeft, r.fTop);
                 canvas->restore();
 
                 r.inset(-SK_ScalarHalf, -SK_ScalarHalf);