add getTotalClipBounds() as a partial replacement for getTotalClip. This can be

faster than getTotalClip, since it doesn't need to compute the actual complex
region for the answer.



git-svn-id: http://skia.googlecode.com/svn/trunk@2452 2bbb7eff-a529-9590-31e7-b0007b416f81

2 files changed, 15 insertions, 0 deletions

diff --git a/include/core/SkCanvas.h b/include/core/SkCanvas.h
index 6ca9fa08a9..73fd7200ad 100644
--- a/include/core/SkCanvas.h
+++ b/include/core/SkCanvas.h
@@ -768,6 +768,14 @@ public:
     const SkRegion& getTotalClip() const;
 
     /**
+     *  Return true if the current clip is non-empty.
+     *
+     *  If bounds is not NULL, set it to the bounds of the current clip
+     *  in global coordinates.
+     */
+    bool getTotalClipBounds(SkIRect* bounds) const;
+
+    /**
      *  Return the current clipstack. This mirrors the result in getTotalClip()
      *  but is represented as a stack of geometric clips + region-ops.
      */
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index f563cd1211..89c6e5b79d 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -1151,6 +1151,13 @@ SkCanvas::ClipType SkCanvas::getClipType() const {
     return kComplex_ClipType;
 }
 
+bool SkCanvas::getTotalClipBounds(SkIRect* bounds) const {
+    if (bounds) {
+        *bounds = fMCRec->fRegion->getBounds();
+    }
+    return !fMCRec->fRegion->isEmpty();
+}
+
 const SkRegion& SkCanvas::getTotalClip() const {
     return *fMCRec->fRegion;
 }