change SkMaskFilter methods to const, in preparation for making the class as

immutable and re-entrant safe.
Review URL: https://codereview.appspot.com/6944069

git-svn-id: http://skia.googlecode.com/svn/trunk@6881 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 5 insertions, 5 deletions

diff --git a/include/core/SkMaskFilter.h b/include/core/SkMaskFilter.h
index 02f58551b4..245de29b8e 100644
--- a/include/core/SkMaskFilter.h
+++ b/include/core/SkMaskFilter.h
@@ -40,7 +40,7 @@ public:
     /** Returns the format of the resulting mask that this subclass will return
         when its filterMask() method is called.
     */
-    virtual SkMask::Format getFormat() = 0;
+    virtual SkMask::Format getFormat() const = 0;
 
     /** Create a new mask by filter the src mask.
         If src.fImage == null, then do not allocate or create the dst image
@@ -56,7 +56,7 @@ public:
         @return true if the dst mask was correctly created.
     */
     virtual bool filterMask(SkMask* dst, const SkMask& src, const SkMatrix&,
-                            SkIPoint* margin);
+                            SkIPoint* margin) const;
 
     enum BlurType {
         kNone_BlurType,    //!< this maskfilter is not a blur
@@ -91,7 +91,7 @@ public:
      *  The default impl calls filterMask with the src mask having no image,
      *  but subclasses may override this if they can compute the rect faster.
      */
-    virtual void computeFastBounds(const SkRect& src, SkRect* dest);
+    virtual void computeFastBounds(const SkRect& src, SkRect* dest) const;
 
 protected:
     // empty for now, but lets get our subclass to remember to init us for the future
@@ -127,7 +127,7 @@ protected:
     virtual FilterReturn filterRectsToNine(const SkRect[], int count,
                                            const SkMatrix&,
                                            const SkIRect& clipBounds,
-                                           NinePatch*);
+                                           NinePatch*) const;
 
 private:
     friend class SkDraw;
@@ -139,7 +139,7 @@ private:
      */
     bool filterPath(const SkPath& devPath, const SkMatrix& devMatrix,
                     const SkRasterClip&, SkBounder*, SkBlitter* blitter,
-                    SkPaint::Style style);
+                    SkPaint::Style style) const;
 
     typedef SkFlattenable INHERITED;
 };