Implemented transparent gradients

src/pdf/SkPDFDevice.cpp

Index: src/pdf/SkPDFDevice.cpp
diff --git a/src/pdf/SkPDFDevice.cpp b/src/pdf/SkPDFDevice.cpp
index db0825af3a9f39d19dcc2a009690484cd32e8137..bb8345be0f87418b5ed9ee7a23596b847232e55f 100644
--- a/src/pdf/SkPDFDevice.cpp
+++ b/src/pdf/SkPDFDevice.cpp
@@ -1186,12 +1186,7 @@ SkPDFDict* SkPDFDevice::getResourceDict() {
 
         // For compatibility, add all proc sets (only used for output to PS
         // devices).
-        const char procs[][7] = {"PDF", "Text", "ImageB", "ImageC", "ImageI"};
-        SkAutoTUnref<SkPDFArray> procSets(new SkPDFArray());
-        procSets->reserve(SK_ARRAY_COUNT(procs));
-        for (size_t i = 0; i < SK_ARRAY_COUNT(procs); i++)
-            procSets->appendName(procs[i]);
-        fResourceDict->insert("ProcSet", procSets.get());
+        fResourceDict->insert("ProcSet", SkPDFUtils::CreateFullProcSetsArray())->unref();
     }
     return fResourceDict;
 }
@@ -1491,7 +1486,8 @@ void SkPDFDevice::drawFormXObjectWithClip(SkPDFFormXObject* xobject,
     this->drawPaint(draw, stockPaint);
     SkAutoTUnref<SkPDFFormXObject> maskFormXObject(createFormXObjectFromDevice());
     SkAutoTUnref<SkPDFGraphicState> sMaskGS(
-        SkPDFGraphicState::GetSMaskGraphicState(maskFormXObject, invertClip));
+        SkPDFGraphicState::GetSMaskGraphicState(maskFormXObject, invertClip,
+                                                SkPDFGraphicState::kAlpha_SMaskMode));
 
     // Draw the xobject with the clip as a mask.
     ScopedContentEntry content(this, &fExistingClipStack, fExistingClipRegion,
@@ -1647,12 +1643,16 @@ void SkPDFDevice::finishContentEntry(const SkXfermode::Mode xfermode,
     if (xfermode == SkXfermode::kSrcIn_Mode ||
             xfermode == SkXfermode::kSrcOut_Mode) {
         sMaskGS.reset(SkPDFGraphicState::GetSMaskGraphicState(
-                dst, xfermode == SkXfermode::kSrcOut_Mode));
+                dst,
+                xfermode == SkXfermode::kSrcOut_Mode,
+                SkPDFGraphicState::kAlpha_SMaskMode));
         fXObjectResources.push(srcFormXObject.get());
         srcFormXObject.get()->ref();
     } else {
         sMaskGS.reset(SkPDFGraphicState::GetSMaskGraphicState(
-                srcFormXObject.get(), xfermode == SkXfermode::kDstOut_Mode));
+                srcFormXObject.get(),
+                xfermode == SkXfermode::kDstOut_Mode,
+                SkPDFGraphicState::kAlpha_SMaskMode));
         // dst already added to fXObjectResources in drawFormXObjectWithClip.
     }
     SkPDFUtils::ApplyGraphicState(addGraphicStateResource(sMaskGS.get()),