add isClipEmpty() -- encourage clients to call this rather than checking clipFoo() results

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"
@@ skipping 1466 matching lines @@
                 break;
             case SkClipStack::Element::kEmpty_Type:
                 visitor->clipRect(kEmpty, SkRegion::kIntersect_Op, false);
                 break;
         }
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
+bool SkCanvas::isClipEmpty() const {
+    return fMCRec->fRasterClip->isEmpty();
+}
+
 bool SkCanvas::quickReject(const SkRect& rect) const {
 
     if (!rect.isFinite())
         return true;
 
     if (fMCRec->fRasterClip->isEmpty()) {
         return true;
     }
 
     if (fMCRec->fMatrix->hasPerspective()) {
@@ skipping 787 matching lines @@
     return *paint;
 }
 
 const SkRegion& SkCanvas::LayerIter::clip() const { return fImpl->getClip(); }
 int SkCanvas::LayerIter::x() const { return fImpl->getX(); }
 int SkCanvas::LayerIter::y() const { return fImpl->getY(); }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 SkCanvas::ClipVisitor::~ClipVisitor() { }