Mark all methods on SkXfermode as const, in preparation for declaring all

xfermodes as immutable/reentrant-safe
Review URL: https://codereview.appspot.com/6941065

git-svn-id: http://skia.googlecode.com/svn/trunk@6855 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 15 insertions, 15 deletions

diff --git a/include/core/SkXfermode.h b/include/core/SkXfermode.h
index 99d5a9cc12..7fc1d501a5 100644
--- a/include/core/SkXfermode.h
+++ b/include/core/SkXfermode.h
@@ -28,13 +28,13 @@ public:
     SkXfermode() {}
 
     virtual void xfer32(SkPMColor dst[], const SkPMColor src[], int count,
-                        const SkAlpha aa[]);
+                        const SkAlpha aa[]) const;
     virtual void xfer16(uint16_t dst[], const SkPMColor src[], int count,
-                        const SkAlpha aa[]);
+                        const SkAlpha aa[]) const;
     virtual void xfer4444(uint16_t dst[], const SkPMColor src[], int count,
-                          const SkAlpha aa[]);
+                          const SkAlpha aa[]) const;
     virtual void xferA8(SkAlpha dst[], const SkPMColor src[], int count,
-                        const SkAlpha aa[]);
+                        const SkAlpha aa[]) const;
 
     /** Enum of possible coefficients to describe some xfermodes
      */
@@ -68,13 +68,13 @@ public:
         srcover     one             isa
         dstover     ida             one
      */
-    virtual bool asCoeff(Coeff* src, Coeff* dst);
+    virtual bool asCoeff(Coeff* src, Coeff* dst) const;
 
     /**
      *  The same as calling xfermode->asCoeff(..), except that this also checks
      *  if the xfermode is NULL, and if so, treats its as kSrcOver_Mode.
      */
-    static bool AsCoeff(SkXfermode*, Coeff* src, Coeff* dst);
+    static bool AsCoeff(const SkXfermode*, Coeff* src, Coeff* dst);
 
     /** List of predefined xfermodes.
         The algebra for the modes uses the following symbols:
@@ -125,13 +125,13 @@ public:
      *  returns true and sets (if not null) mode accordingly. Otherwise it
      *  returns false and ignores the mode parameter.
      */
-    virtual bool asMode(Mode* mode);
+    virtual bool asMode(Mode* mode) const;
 
     /**
      *  The same as calling xfermode->asMode(mode), except that this also checks
      *  if the xfermode is NULL, and if so, treats its as kSrcOver_Mode.
      */
-    static bool AsMode(SkXfermode*, Mode* mode);
+    static bool AsMode(const SkXfermode*, Mode* mode);
 
     /**
      *  Returns true if the xfermode claims to be the specified Mode. This works
@@ -143,7 +143,7 @@ public:
      *      ...
      *  }
      */
-    static bool IsMode(SkXfermode* xfer, Mode mode);
+    static bool IsMode(const SkXfermode* xfer, Mode mode);
 
     /** Return an SkXfermode object for the specified mode.
      */
@@ -170,7 +170,7 @@ public:
     static bool ModeAsCoeff(Mode mode, Coeff* src, Coeff* dst);
 
     // DEPRECATED: call AsMode(...)
-    static bool IsMode(SkXfermode* xfer, Mode* mode) {
+    static bool IsMode(const SkXfermode* xfer, Mode* mode) {
         return AsMode(xfer, mode);
     }
 
@@ -186,7 +186,7 @@ protected:
         This method will not be called directly by the client, so it need not
         be implemented if your subclass has overridden xfer32/xfer16/xferA8
     */
-    virtual SkPMColor xferColor(SkPMColor src, SkPMColor dst);
+    virtual SkPMColor xferColor(SkPMColor src, SkPMColor dst) const;
 
 private:
     enum {
@@ -208,13 +208,13 @@ public:
 
     // overrides from SkXfermode
     virtual void xfer32(SkPMColor dst[], const SkPMColor src[], int count,
-                        const SkAlpha aa[]) SK_OVERRIDE;
+                        const SkAlpha aa[]) const SK_OVERRIDE;
     virtual void xfer16(uint16_t dst[], const SkPMColor src[], int count,
-                        const SkAlpha aa[]) SK_OVERRIDE;
+                        const SkAlpha aa[]) const SK_OVERRIDE;
     virtual void xfer4444(uint16_t dst[], const SkPMColor src[], int count,
-                          const SkAlpha aa[]) SK_OVERRIDE;
+                          const SkAlpha aa[]) const SK_OVERRIDE;
     virtual void xferA8(SkAlpha dst[], const SkPMColor src[], int count,
-                        const SkAlpha aa[]) SK_OVERRIDE;
+                        const SkAlpha aa[]) const SK_OVERRIDE;
 
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkProcXfermode)