Creating framework for drawShadowedPicture

src/core/SkCanvas.cpp

Index: src/core/SkCanvas.cpp
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 6119c4ff2f9b771eb267a9812c6a60faef7a5048..f6777e021a2faa177347a4500ee3701cbc17c161 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -665,6 +665,9 @@ SkBaseDevice* SkCanvas::init(SkBaseDevice* device, InitFlags flags) {
     fDeviceCMDirty = true;
     fSaveCount = 1;
     fMetaData = nullptr;
+#ifdef SK_USE_SHADOWS
+    fLights = nullptr;
+#endif
 
     fClipStack.reset(new SkClipStack);
 
@@ -1544,6 +1547,7 @@ void SkCanvas::resetMatrix() {
     this->setMatrix(SkMatrix::I());
 }
 
+#ifdef SK_USE_SHADOWS
 void SkCanvas::translateZ(SkScalar z) {
     this->checkForDeferredSave();
     this->fMCRec->fCurDrawDepth += z;
@@ -1554,6 +1558,15 @@ SkScalar SkCanvas::getZ() const {
     return this->fMCRec->fCurDrawDepth;
 }
 
+void SkCanvas::setLights(sk_sp<SkLights> lights) {
+    this->fLights = lights;
+}
+
+sk_sp<SkLights> SkCanvas::getLights() const {
+    return this->fLights;
+}
+#endif
+
 //////////////////////////////////////////////////////////////////////////////
 
 void SkCanvas::clipRect(const SkRect& rect, SkRegion::Op op, bool doAA) {
@@ -3031,6 +3044,24 @@ void SkCanvas::onDrawPicture(const SkPicture* picture, const SkMatrix* matrix,
     picture->playback(this);
 }
 
+#ifdef SK_USE_SHADOWS
+void SkCanvas::drawShadowedPicture(const SkPicture* picture,
+                                   const SkMatrix* matrix,
+                                   const SkPaint* paint) {
+    RETURN_ON_NULL(picture);
+
+    TRACE_EVENT0("disabled-by-default-skia", "SkCanvas::drawShadowedPicture()");
+
+    this->onDrawShadowedPicture(picture, matrix, paint);
+}
+
+void SkCanvas::onDrawShadowedPicture(const SkPicture* picture,
+                                     const SkMatrix* matrix,
+                                     const SkPaint* paint) {
+    this->onDrawPicture(picture, matrix, paint);
+}
+#endif
+
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////