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, 37 insertions, 36 deletions

diff --git a/gm/xfermodes.cpp b/gm/xfermodes.cpp
index 604a767a4f..8fbbdbec6a 100644
--- a/gm/xfermodes.cpp
+++ b/gm/xfermodes.cpp
@@ -34,45 +34,45 @@ enum SrcType {
 };
 
 const struct {
-    SkBlendMode fMode;
-    const char* fLabel;
-    int         fSourceTypeMask;  // The source types to use this
+    SkXfermode::Mode  fMode;
+    const char*       fLabel;
+    int               fSourceTypeMask;  // The source types to use this
     // mode with. See draw_mode for
     // an explanation of each type.
     // PDF has to play some tricks
     // to support the base modes,
     // test those more extensively.
 } gModes[] = {
-    { SkBlendMode::kClear,        "Clear",        kAll_SrcType   },
-    { SkBlendMode::kSrc,          "Src",          kAll_SrcType   },
-    { SkBlendMode::kDst,          "Dst",          kAll_SrcType   },
-    { SkBlendMode::kSrcOver,      "SrcOver",      kAll_SrcType   },
-    { SkBlendMode::kDstOver,      "DstOver",      kAll_SrcType   },
-    { SkBlendMode::kSrcIn,        "SrcIn",        kAll_SrcType   },
-    { SkBlendMode::kDstIn,        "DstIn",        kAll_SrcType   },
-    { SkBlendMode::kSrcOut,       "SrcOut",       kAll_SrcType   },
-    { SkBlendMode::kDstOut,       "DstOut",       kAll_SrcType   },
-    { SkBlendMode::kSrcATop,      "SrcATop",      kAll_SrcType   },
-    { SkBlendMode::kDstATop,      "DstATop",      kAll_SrcType   },
-
-    { SkBlendMode::kXor,          "Xor",          kBasic_SrcType },
-    { SkBlendMode::kPlus,         "Plus",         kBasic_SrcType },
-    { SkBlendMode::kModulate,     "Modulate",     kAll_SrcType   },
-    { SkBlendMode::kScreen,       "Screen",       kBasic_SrcType },
-    { SkBlendMode::kOverlay,      "Overlay",      kBasic_SrcType },
-    { SkBlendMode::kDarken,       "Darken",       kBasic_SrcType },
-    { SkBlendMode::kLighten,      "Lighten",      kBasic_SrcType },
-    { SkBlendMode::kColorDodge,   "ColorDodge",   kBasic_SrcType },
-    { SkBlendMode::kColorBurn,    "ColorBurn",    kBasic_SrcType },
-    { SkBlendMode::kHardLight,    "HardLight",    kBasic_SrcType },
-    { SkBlendMode::kSoftLight,    "SoftLight",    kBasic_SrcType },
-    { SkBlendMode::kDifference,   "Difference",   kBasic_SrcType },
-    { SkBlendMode::kExclusion,    "Exclusion",    kBasic_SrcType },
-    { SkBlendMode::kMultiply,     "Multiply",     kAll_SrcType   },
-    { SkBlendMode::kHue,          "Hue",          kBasic_SrcType },
-    { SkBlendMode::kSaturation,   "Saturation",   kBasic_SrcType },
-    { SkBlendMode::kColor,        "Color",        kBasic_SrcType },
-    { SkBlendMode::kLuminosity,   "Luminosity",   kBasic_SrcType },
+    { SkXfermode::kClear_Mode,        "Clear",        kAll_SrcType   },
+    { SkXfermode::kSrc_Mode,          "Src",          kAll_SrcType   },
+    { SkXfermode::kDst_Mode,          "Dst",          kAll_SrcType   },
+    { SkXfermode::kSrcOver_Mode,      "SrcOver",      kAll_SrcType   },
+    { SkXfermode::kDstOver_Mode,      "DstOver",      kAll_SrcType   },
+    { SkXfermode::kSrcIn_Mode,        "SrcIn",        kAll_SrcType   },
+    { SkXfermode::kDstIn_Mode,        "DstIn",        kAll_SrcType   },
+    { SkXfermode::kSrcOut_Mode,       "SrcOut",       kAll_SrcType   },
+    { SkXfermode::kDstOut_Mode,       "DstOut",       kAll_SrcType   },
+    { SkXfermode::kSrcATop_Mode,      "SrcATop",      kAll_SrcType   },
+    { SkXfermode::kDstATop_Mode,      "DstATop",      kAll_SrcType   },
+
+    { SkXfermode::kXor_Mode,          "Xor",          kBasic_SrcType },
+    { SkXfermode::kPlus_Mode,         "Plus",         kBasic_SrcType },
+    { SkXfermode::kModulate_Mode,     "Modulate",     kAll_SrcType   },
+    { SkXfermode::kScreen_Mode,       "Screen",       kBasic_SrcType },
+    { SkXfermode::kOverlay_Mode,      "Overlay",      kBasic_SrcType },
+    { SkXfermode::kDarken_Mode,       "Darken",       kBasic_SrcType },
+    { SkXfermode::kLighten_Mode,      "Lighten",      kBasic_SrcType },
+    { SkXfermode::kColorDodge_Mode,   "ColorDodge",   kBasic_SrcType },
+    { SkXfermode::kColorBurn_Mode,    "ColorBurn",    kBasic_SrcType },
+    { SkXfermode::kHardLight_Mode,    "HardLight",    kBasic_SrcType },
+    { SkXfermode::kSoftLight_Mode,    "SoftLight",    kBasic_SrcType },
+    { SkXfermode::kDifference_Mode,   "Difference",   kBasic_SrcType },
+    { SkXfermode::kExclusion_Mode,    "Exclusion",    kBasic_SrcType },
+    { SkXfermode::kMultiply_Mode,     "Multiply",     kAll_SrcType   },
+    { SkXfermode::kHue_Mode,          "Hue",          kBasic_SrcType },
+    { SkXfermode::kSaturation_Mode,   "Saturation",   kBasic_SrcType },
+    { SkXfermode::kColor_Mode,        "Color",        kBasic_SrcType },
+    { SkXfermode::kLuminosity_Mode,   "Luminosity",   kBasic_SrcType },
 };
 
 static void make_bitmaps(int w, int h, SkBitmap* src, SkBitmap* dst,
@@ -118,14 +118,15 @@ class XfermodesGM : public skiagm::GM {
      * uses the implied shape of the drawing command and these modes
      * demonstrate that.
      */
-    void draw_mode(SkCanvas* canvas, SkBlendMode mode, SrcType srcType, SkScalar x, SkScalar y) {
+    void draw_mode(SkCanvas* canvas, SkXfermode::Mode mode, SrcType srcType,
+                   SkScalar x, SkScalar y) {
         SkPaint p;
         SkMatrix m;
         bool restoreNeeded = false;
         m.setTranslate(x, y);
 
         canvas->drawBitmap(fSrcB, x, y, &p);
-        p.setBlendMode(mode);
+        p.setXfermodeMode(mode);
         switch (srcType) {
             case kSmallTransparentImage_SrcType: {
                 m.postScale(SK_ScalarHalf, SK_ScalarHalf, x, y);
@@ -140,7 +141,7 @@ class XfermodesGM : public skiagm::GM {
                                                  SkIntToScalar(H));
                 canvas->saveLayer(&bounds, &p);
                 restoreNeeded = true;
-                p.setBlendMode(SkBlendMode::kSrcOver);
+                p.setXfermodeMode(SkXfermode::kSrcOver_Mode);
                 // Fall through.
             }
             case kQuarterClear_SrcType: {