Pass effects directly to fontcache

src/core/SkScalerContext.cpp

Index: src/core/SkScalerContext.cpp
diff --git a/src/core/SkScalerContext.cpp b/src/core/SkScalerContext.cpp
index cf4098bbdda9ccc07358d55415b6693f883e4aa8..10082b7c7c3606924246d8c94bbd716f496a522c 100644
--- a/src/core/SkScalerContext.cpp
+++ b/src/core/SkScalerContext.cpp
@@ -76,16 +76,14 @@ static SkFlattenable* load_flattenable(const SkDescriptor* desc, uint32_t tag,
     return obj;
 }
 
-SkScalerContext::SkScalerContext(SkTypeface* typeface, const SkDescriptor* desc)
+SkScalerContext::SkScalerContext(const SkScalerContextEffects& effects,
+                                 const SkDescriptor* desc)
     : fRec(*static_cast<const Rec*>(desc->findEntry(kRec_SkDescriptorTag, nullptr)))
 
-    , fTypeface(SkRef(typeface))
-    , fPathEffect(static_cast<SkPathEffect*>(load_flattenable(desc, kPathEffect_SkDescriptorTag,
-                                             SkFlattenable::kSkPathEffect_Type)))
-    , fMaskFilter(static_cast<SkMaskFilter*>(load_flattenable(desc, kMaskFilter_SkDescriptorTag,
-                                             SkFlattenable::kSkMaskFilter_Type)))
-    , fRasterizer(static_cast<SkRasterizer*>(load_flattenable(desc, kRasterizer_SkDescriptorTag,
-                                             SkFlattenable::kSkRasterizer_Type)))
+    , fTypeface(effects.fTypeface)
+    , fPathEffect(effects.fPathEffect)
+    , fMaskFilter(effects.fMaskFilter)
+    , fRasterizer(effects.fRasterizer)

[f(malita), 2016/04/06 13:28:32]

Is there a way to take advantage of move semantics here (maybe pass effects by
val)?

       // Initialize based on our settings. Subclasses can also force this.
     , fGenerateImageFromPath(fRec.fFrameWidth > 0 || fPathEffect != nullptr || fRasterizer != nullptr)
 
@@ -109,11 +107,7 @@ SkScalerContext::SkScalerContext(SkTypeface* typeface, const SkDescriptor* desc)
 #endif
 }
 
-SkScalerContext::~SkScalerContext() {
-    SkSafeUnref(fPathEffect);
-    SkSafeUnref(fMaskFilter);
-    SkSafeUnref(fRasterizer);
-}
+SkScalerContext::~SkScalerContext() {}
 
 void SkScalerContext::getAdvance(SkGlyph* glyph) {
     // mark us as just having a valid advance
@@ -156,7 +150,7 @@ void SkScalerContext::getMetrics(SkGlyph* glyph) {
             SkMask  mask;
 
             if (fRasterizer->rasterize(fillPath, fillToDevMatrix, nullptr,
-                                       fMaskFilter, &mask,
+                                       fMaskFilter.get(), &mask,
                                        SkMask::kJustComputeBounds_CreateMode)) {
                 glyph->fLeft    = mask.fBounds.fLeft;
                 glyph->fTop     = mask.fBounds.fTop;
@@ -485,10 +479,9 @@ void SkScalerContext::getImage(const SkGlyph& origGlyph) {
         tmpGlyph.initGlyphIdFrom(origGlyph);
 
         // need the original bounds, sans our maskfilter
-        SkMaskFilter* mf = fMaskFilter;
-        fMaskFilter = nullptr;             // temp disable
+        SkMaskFilter* mf = fMaskFilter.release();   // temp disable
         this->getMetrics(&tmpGlyph);
-        fMaskFilter = mf;               // restore
+        fMaskFilter = sk_sp<SkMaskFilter>(mf);      // restore
 
         // we need the prefilter bounds to be <= filter bounds
         SkASSERT(tmpGlyph.fWidth <= origGlyph.fWidth);
@@ -516,7 +509,7 @@ void SkScalerContext::getImage(const SkGlyph& origGlyph) {
             sk_bzero(glyph->fImage, mask.computeImageSize());
 
             if (!fRasterizer->rasterize(fillPath, fillToDevMatrix, nullptr,
-                                        fMaskFilter, &mask,
+                                        fMaskFilter.get(), &mask,
                                         SkMask::kJustRenderImage_CreateMode)) {
                 return;
             }
@@ -851,8 +844,8 @@ SkAxisAlignment SkScalerContext::computeAxisAlignmentForHText() {
 
 class SkScalerContext_Empty : public SkScalerContext {
 public:
-    SkScalerContext_Empty(SkTypeface* face, const SkDescriptor* desc)
-        : SkScalerContext(face, desc) {}
+    SkScalerContext_Empty(const SkScalerContextEffects& effects, const SkDescriptor* desc)
+        : SkScalerContext(effects, desc) {}
 
 protected:
     unsigned generateGlyphCount() override {
@@ -878,12 +871,15 @@ protected:
 
 extern SkScalerContext* SkCreateColorScalerContext(const SkDescriptor* desc);
 
-SkScalerContext* SkTypeface::createScalerContext(const SkDescriptor* desc,
+SkScalerContext* SkTypeface::createScalerContext(const SkScalerContextEffects& effects,
+                                                 const SkDescriptor* desc,
                                                  bool allowFailure) const {
-    SkScalerContext* c = this->onCreateScalerContext(desc);
+    SkScalerContext* c = this->onCreateScalerContext(effects, desc);
 
     if (!c && !allowFailure) {
-        c = new SkScalerContext_Empty(const_cast<SkTypeface*>(this), desc);
+        SkScalerContextEffects effects;
+        effects.fTypeface = sk_ref_sp(const_cast<SkTypeface*>(this));
+        c = new SkScalerContext_Empty(effects, desc);
     }
     return c;
 }