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>

4 files changed, 26 insertions, 4 deletions

diff --git a/tools/debugger/SkDebugCanvas.cpp b/tools/debugger/SkDebugCanvas.cpp
index 1da995b284..f15c68c869 100644
--- a/tools/debugger/SkDebugCanvas.cpp
+++ b/tools/debugger/SkDebugCanvas.cpp
@@ -42,8 +42,7 @@ protected:
         if (*paint) {
             if (nullptr != fOverdrawXfermode.get()) {
                 paint->writable()->setAntiAlias(false);
-                // TODO: replace overdraw mode with something else
-//                paint->writable()->setXfermode(fOverdrawXfermode);
+                paint->writable()->setXfermode(fOverdrawXfermode);
             }
 
             if (fOverrideFilterQuality) {
diff --git a/tools/debugger/SkDrawCommand.cpp b/tools/debugger/SkDrawCommand.cpp
index 156ca4f74d..ba6302ca3a 100644
--- a/tools/debugger/SkDrawCommand.cpp
+++ b/tools/debugger/SkDrawCommand.cpp
@@ -1116,6 +1116,16 @@ static void apply_paint_shader(const SkPaint& paint, Json::Value* target,
     }
 }
 
+static void apply_paint_xfermode(const SkPaint& paint, Json::Value* target,
+                                 UrlDataManager& urlDataManager) {
+    SkFlattenable* xfermode = paint.getXfermode();
+    if (xfermode != nullptr) {
+        Json::Value jsonXfermode;
+        SkDrawCommand::flatten(xfermode, &jsonXfermode, urlDataManager);
+        (*target)[SKDEBUGCANVAS_ATTRIBUTE_XFERMODE] = jsonXfermode;
+    }
+}
+
 static void apply_paint_imagefilter(const SkPaint& paint, Json::Value* target,
                                     UrlDataManager& urlDataManager) {
     SkFlattenable* imageFilter = paint.getImageFilter();
@@ -1167,6 +1177,7 @@ Json::Value SkDrawCommand::MakeJsonPaint(const SkPaint& paint, UrlDataManager& u
     apply_paint_patheffect(paint, &result, urlDataManager);
     apply_paint_maskfilter(paint, &result, urlDataManager);
     apply_paint_shader(paint, &result, urlDataManager);
+    apply_paint_xfermode(paint, &result, urlDataManager);
     apply_paint_looper(paint, &result, urlDataManager);
     apply_paint_imagefilter(paint, &result, urlDataManager);
     apply_paint_colorfilter(paint, &result, urlDataManager);
@@ -1235,6 +1246,17 @@ static void extract_json_paint_colorfilter(Json::Value& jsonPaint, UrlDataManage
     }
 }
 
+static void extract_json_paint_xfermode(Json::Value& jsonPaint, UrlDataManager& urlDataManager,
+                                        SkPaint* target) {
+    if (jsonPaint.isMember(SKDEBUGCANVAS_ATTRIBUTE_XFERMODE)) {
+        Json::Value jsonXfermode = jsonPaint[SKDEBUGCANVAS_ATTRIBUTE_XFERMODE];
+        sk_sp<SkXfermode> xfermode((SkXfermode*) load_flattenable(jsonXfermode, urlDataManager));
+        if (xfermode != nullptr) {
+            target->setXfermode(xfermode);
+        }
+    }
+}
+
 static void extract_json_paint_looper(Json::Value& jsonPaint, UrlDataManager& urlDataManager,
                                       SkPaint* target) {
     if (jsonPaint.isMember(SKDEBUGCANVAS_ATTRIBUTE_LOOPER)) {
@@ -1481,6 +1503,7 @@ static void extract_json_paint(Json::Value& paint, UrlDataManager& urlDataManage
     extract_json_paint_patheffect(paint, urlDataManager, result);
     extract_json_paint_maskfilter(paint, urlDataManager, result);
     extract_json_paint_colorfilter(paint, urlDataManager, result);
+    extract_json_paint_xfermode(paint, urlDataManager, result);
     extract_json_paint_looper(paint, urlDataManager, result);
     extract_json_paint_imagefilter(paint, urlDataManager, result);
     extract_json_paint_typeface(paint, urlDataManager, result);
diff --git a/tools/sk_tool_utils.cpp b/tools/sk_tool_utils.cpp
index c84d452b92..72d1af5083 100644
--- a/tools/sk_tool_utils.cpp
+++ b/tools/sk_tool_utils.cpp
@@ -220,7 +220,7 @@ SkBitmap create_checkerboard_bitmap(int w, int h, SkColor c1, SkColor c2, int ch
 void draw_checkerboard(SkCanvas* canvas, SkColor c1, SkColor c2, int size) {
     SkPaint paint;
     paint.setShader(create_checkerboard_shader(c1, c2, size));
-    paint.setBlendMode(SkBlendMode::kSrc);
+    paint.setXfermodeMode(SkXfermode::kSrc_Mode);
     canvas->drawPaint(paint);
 }
 
diff --git a/tools/viewer/sk_app/mac/RasterWindowContext_mac.cpp b/tools/viewer/sk_app/mac/RasterWindowContext_mac.cpp
index fd2f2effb1..47f349b2eb 100644
--- a/tools/viewer/sk_app/mac/RasterWindowContext_mac.cpp
+++ b/tools/viewer/sk_app/mac/RasterWindowContext_mac.cpp
@@ -121,7 +121,7 @@ void RasterWindowContext_mac::onSwapBuffers() {
                        (fDisplayParams.fColorSpace != nullptr ||
                         kRGBA_F16_SkColorType == fDisplayParams.fColorType);
         SkPaint gammaPaint;
-        gammaPaint.setBlendMode(SkBlendMode::kSrc);
+        gammaPaint.setXfermodeMode(SkXfermode::kSrc_Mode);
         if (doGamma) {
             gammaPaint.setColorFilter(SkGammaColorFilter::Make(1.0f / 2.2f));
         }