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, 0 insertions, 61 deletions

diff --git a/src/core/SkXfermode.cpp b/src/core/SkXfermode.cpp
index 38a160870e..58c557805b 100644
--- a/src/core/SkXfermode.cpp
+++ b/src/core/SkXfermode.cpp
@@ -1472,64 +1472,3 @@ bool SkProcCoeffXfermode::onAppendStages(SkRasterPipeline* p) const {
     }
     return false;
 }
-
-///////////////////////////////////////////////////////////////////////////////////////////////////
-
-bool SkBlendMode_SupportsCoverageAsAlpha(SkBlendMode mode) {
-    switch (mode) {
-        case SkBlendMode::kDst:
-        case SkBlendMode::kSrcOver:
-        case SkBlendMode::kDstOver:
-        case SkBlendMode::kDstOut:
-        case SkBlendMode::kSrcATop:
-        case SkBlendMode::kXor:
-        case SkBlendMode::kPlus:
-            return true;
-        default:
-            break;
-    }
-    return false;
-}
-
-bool SkXfermode::IsOpaque(SkBlendMode mode, SrcColorOpacity opacityType) {
-    const ProcCoeff rec = gProcCoeffs[(int)mode];
-
-    switch (rec.fSC) {
-        case kDA_Coeff:
-        case kDC_Coeff:
-        case kIDA_Coeff:
-        case kIDC_Coeff:
-            return false;
-        default:
-            break;
-    }
-
-    switch (rec.fDC) {
-        case kZero_Coeff:
-            return true;
-        case kISA_Coeff:
-            return kOpaque_SrcColorOpacity == opacityType;
-        case kSA_Coeff:
-            return kTransparentBlack_SrcColorOpacity == opacityType ||
-            kTransparentAlpha_SrcColorOpacity == opacityType;
-        case kSC_Coeff:
-            return kTransparentBlack_SrcColorOpacity == opacityType;
-        default:
-            return false;
-    }
-    return false;
-}
-
-#if SK_SUPPORT_GPU
-sk_sp<GrXPFactory> SkBlendMode_AsXPFactory(SkBlendMode mode) {
-    const ProcCoeff rec = gProcCoeffs[(int)mode];
-    if (CANNOT_USE_COEFF != rec.fSC) {
-        sk_sp<GrXPFactory> result(GrPorterDuffXPFactory::Make(mode));
-        SkASSERT(result);
-        return result;
-    }
-
-    SkASSERT(GrCustomXfermode::IsSupportedMode((SkXfermode::Mode)mode));
-    return GrCustomXfermode::MakeXPFactory((SkXfermode::Mode)mode);
-}
-#endif