Revert "Revert "Revert "replace SkXfermode obj with SkBlendMode enum in paints"""

This reverts commit I86875511a13497112827cbaed1dbd7639e9e3d10.

legacy (100K) skp failure

Original change's description:
> Revert "Revert "replace SkXfermode obj with SkBlendMode enum in paints""
> 
> This reverts commit ce02e7175872abde3721df9e5d3ec0ab8384cd8e.
> 
> BUG=skia:
> 
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2878
> 
> Change-Id: I86875511a13497112827cbaed1dbd7639e9e3d10
> Reviewed-on: https://skia-review.googlesource.com/2878
> Reviewed-by: Matt Sarett <msarett@google.com>
> Commit-Queue: Mike Reed <reed@google.com>
> 

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

Change-Id: Ife6f0cf3a22b3e8cf885a188f7f44e1ff62e06a5
Reviewed-on: https://skia-review.googlesource.com/2881
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>

1 files changed, 16 insertions, 9 deletions

diff --git a/src/core/SkXfermodeInterpretation.cpp b/src/core/SkXfermodeInterpretation.cpp
index 3a1da368d7..1b2c8e32e6 100644
--- a/src/core/SkXfermodeInterpretation.cpp
+++ b/src/core/SkXfermodeInterpretation.cpp
@@ -9,31 +9,38 @@
 #include "SkPaint.h"
 
 static bool just_solid_color(const SkPaint& p) {
-    return SK_AlphaOPAQUE == p.getAlpha() && !p.getColorFilter() && !p.getShader();
+    return SK_AlphaOPAQUE == p.getAlpha()
+        && !p.getColorFilter() && !p.getShader();
 }
 
-SkXfermodeInterpretation SkInterpretXfermode(const SkPaint& paint, bool dstIsOpaque) {
-    switch (paint.getBlendMode()) {
-        case SkBlendMode::kSrcOver:
+SkXfermodeInterpretation SkInterpretXfermode(const SkPaint& paint,
+                                             bool dstIsOpaque) {
+    const SkXfermode* xfer = paint.getXfermode();
+    SkXfermode::Mode mode;
+    if (!SkXfermode::AsMode(xfer, &mode)) {
+        return kNormal_SkXfermodeInterpretation;
+    }
+    switch (mode) {
+        case SkXfermode::kSrcOver_Mode:
             return kSrcOver_SkXfermodeInterpretation;
-        case SkBlendMode::kSrc:
+        case SkXfermode::kSrc_Mode:
             if (just_solid_color(paint)) {
                 return kSrcOver_SkXfermodeInterpretation;
             }
             return kNormal_SkXfermodeInterpretation;
-        case SkBlendMode::kDst:
+        case SkXfermode::kDst_Mode:
             return kSkipDrawing_SkXfermodeInterpretation;
-        case SkBlendMode::kDstOver:
+        case SkXfermode::kDstOver_Mode:
             if (dstIsOpaque) {
                 return kSkipDrawing_SkXfermodeInterpretation;
             }
             return kNormal_SkXfermodeInterpretation;
-        case SkBlendMode::kSrcIn:
+        case SkXfermode::kSrcIn_Mode:
             if (dstIsOpaque && just_solid_color(paint)) {
                 return kSrcOver_SkXfermodeInterpretation;
             }
             return kNormal_SkXfermodeInterpretation;
-        case SkBlendMode::kDstIn:
+        case SkXfermode::kDstIn_Mode:
             if (just_solid_color(paint)) {
                 return kSkipDrawing_SkXfermodeInterpretation;
             }