Revert "replace SkXfermode obj with SkBlendMode enum in paints"

This reverts commit I4fb489ba6b3f77b458f7e4a99f79c7ad10859135.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> replace SkXfermode obj with SkBlendMode enum in paints
> 
> BUG=skia:5814
> 
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2714
> 
> Change-Id: I4fb489ba6b3f77b458f7e4a99f79c7ad10859135
> Reviewed-on: https://skia-review.googlesource.com/2714
> Reviewed-by: Florin Malita <fmalita@chromium.org>
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Mike Reed <reed@google.com>
> 

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

Change-Id: I3e43f79ef5c1709929663fe63cc1f67cd78270b7
Reviewed-on: https://skia-review.googlesource.com/2871
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/src/core/SkSpriteBlitter_ARGB32.cpp b/src/core/SkSpriteBlitter_ARGB32.cpp
index 1a76b1b2fe..93885996ea 100644
--- a/src/core/SkSpriteBlitter_ARGB32.cpp
+++ b/src/core/SkSpriteBlitter_ARGB32.cpp
@@ -63,7 +63,8 @@ public:
         fColorFilter = paint.getColorFilter();
         SkSafeRef(fColorFilter);
 
-        fXfermode = SkXfermode::Peek(paint.getBlendMode());
+        fXfermode = paint.getXfermode();
+        SkSafeRef(fXfermode);
 
         fBufferSize = 0;
         fBuffer = nullptr;
@@ -82,6 +83,7 @@ public:
 
     virtual ~Sprite_D32_XferFilter() {
         delete[] fBuffer;
+        SkSafeUnref(fXfermode);
         SkSafeUnref(fColorFilter);
     }
 
@@ -261,7 +263,7 @@ SkSpriteBlitter* SkSpriteBlitter::ChooseL32(const SkPixmap& source, const SkPain
     }
 
     U8CPU       alpha = paint.getAlpha();
-    bool isSrcOver = paint.isSrcOver();
+    SkXfermode* xfermode = paint.getXfermode();
     SkColorFilter* filter = paint.getColorFilter();
     SkSpriteBlitter* blitter = nullptr;
 
@@ -270,7 +272,7 @@ SkSpriteBlitter* SkSpriteBlitter::ChooseL32(const SkPixmap& source, const SkPain
             if (alpha != 0xFF) {
                 return nullptr;    // we only have opaque sprites
             }
-            if (!isSrcOver || filter) {
+            if (xfermode || filter) {
                 blitter = allocator->createT<Sprite_D32_S4444_XferFilter>(source, paint);
             } else if (source.isOpaque()) {
                 blitter = allocator->createT<Sprite_D32_S4444_Opaque>(source);
@@ -279,7 +281,7 @@ SkSpriteBlitter* SkSpriteBlitter::ChooseL32(const SkPixmap& source, const SkPain
             }
             break;
         case kN32_SkColorType:
-            if (!isSrcOver || filter) {
+            if (xfermode || filter) {
                 if (255 == alpha) {
                     // this can handle xfermode or filter, but not alpha
                     blitter = allocator->createT<Sprite_D32_S32A_XferFilter>(source, paint);