Add Xfer Processor for GrCustomXfermodes

BUG=skia:

Review URL: https://codereview.chromium.org/852203003

2 files changed, 13 insertions, 0 deletions

diff --git a/src/core/SkXfermode.cpp b/src/core/SkXfermode.cpp
index 9d727f07f1..37dbd0d1e2 100644
--- a/src/core/SkXfermode.cpp
+++ b/src/core/SkXfermode.cpp
@@ -932,6 +932,17 @@ bool SkProcCoeffXfermode::asFragmentProcessor(GrFragmentProcessor** fp,
     }
     return false;
 }
+
+bool SkProcCoeffXfermode::asXPFactory(GrXPFactory** xp) const {
+    if (GrCustomXfermode::IsSupportedMode(fMode)) {
+        if (xp) {
+            *xp = GrCustomXfermode::CreateXPFactory(fMode);
+            SkASSERT(*xp);
+        }
+        return true;
+    }
+    return false;
+}
 #endif
 
 const char* SkXfermode::ModeName(Mode mode) {
diff --git a/src/core/SkXfermode_proccoeff.h b/src/core/SkXfermode_proccoeff.h
index 504e64db68..88b4d34e63 100644
--- a/src/core/SkXfermode_proccoeff.h
+++ b/src/core/SkXfermode_proccoeff.h
@@ -37,6 +37,8 @@ public:
 #if SK_SUPPORT_GPU
     virtual bool asFragmentProcessor(GrFragmentProcessor**,
                                      GrTexture* background) const SK_OVERRIDE;
+
+    virtual bool asXPFactory(GrXPFactory**) const SK_OVERRIDE;
 #endif
 
     SK_TO_STRING_OVERRIDE()