Add getCurrentClipPath() to SkCanvas.

src/core/SkCanvas.cpp

 /*
  * Copyright 2008 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkCanvas.h"
 #include "SkBitmapDevice.h"
@@ skipping 1775 matching lines @@
 void SkCanvas::internal_private_getTotalClipAsPath(SkPath* path) const {
     path->reset();
 
     const SkRegion& rgn = fMCRec->fRasterClip->forceGetBW();
     if (rgn.isEmpty()) {
         return;
     }
     (void)rgn.getBoundaryPath(path);
 }
 
+void SkCanvas::getCurrentClipPath(SkPath* path) const {
+
+    if (!path)
+        return;
+
+    const SkClipStack* clipStack = getClipStack();
+    SkClipStack::Iter iter(*clipStack, SkClipStack::Iter::kBottom_IterStart);
+    const SkClipStack::Element* element;
+
+    SkPath totalClipPath;
+    totalClipPath.setFillType(SkPath::kInverseEvenOdd_FillType);
+
+    while ((element = iter.next())) {
+
+        SkClipStack::Element::Type type = element->getType();
+        SkPath clipPath;
+        if (type != SkClipStack::Element::kEmpty_Type)
+            element->asPath(&clipPath);
+
+        SkRegion::Op elementOp = element->getOp();
+        if (elementOp == SkRegion::kReplace_Op)
+            totalClipPath = clipPath;
+        else
+            Op(totalClipPath, clipPath, (SkPathOp)elementOp, &totalClipPath);
+    }
+
+    *path = totalClipPath;
+}
+
 GrRenderTarget* SkCanvas::internal_private_accessTopLayerRenderTarget() {
     SkBaseDevice* dev = this->getTopDevice();
     return dev ? dev->accessRenderTarget() : NULL;
 }
 
 SkBaseDevice* SkCanvas::createLayerDevice(const SkImageInfo& info) {
     SkBaseDevice* device = this->getTopDevice();
     return device ? device->createCompatibleDeviceForSaveLayer(info) : NULL;
 }
 
@@ skipping 782 matching lines @@
     if (!supported_for_raster_canvas(info)) {
         return NULL;
     }
 
     SkBitmap bitmap;
     if (!bitmap.installPixels(info, pixels, rowBytes)) {
         return NULL;
     }
     return SkNEW_ARGS(SkCanvas, (bitmap));
 }