Factory methods for heap-allocated SkImageFilter objects.

include/effects/SkMorphologyImageFilter.h

 /*
  * Copyright 2012 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.
  */
 
 
 #ifndef SkMorphologyImageFilter_DEFINED
 #define SkMorphologyImageFilter_DEFINED
 
 #include "SkColor.h"
 #include "SkImageFilter.h"
 #include "SkSize.h"
 
 class SK_API SkMorphologyImageFilter : public SkImageFilter {
 public:
-    SkMorphologyImageFilter(int radiusX, int radiusY, SkImageFilter* input, const CropRect* cropRect);
     virtual void computeFastBounds(const SkRect& src, SkRect* dst) const SK_OVERRIDE;
     virtual bool onFilterBounds(const SkIRect& src, const SkMatrix& ctm, SkIRect* dst) const SK_OVERRIDE;
 
     /**
      * All morphology procs have the same signature: src is the source buffer, dst the
      * destination buffer, radius is the morphology radius, width and height are the bounds
      * of the destination buffer (in pixels), and srcStride and dstStride are the
      * number of pixels per row in each buffer. All buffers are 8888.
      */
 
     typedef void (*Proc)(const SkPMColor* src, SkPMColor* dst, int radius,
                          int width, int height, int srcStride, int dstStride);
 
 protected:
+    SkMorphologyImageFilter(int radiusX, int radiusY, SkImageFilter* input,
+                            const CropRect* cropRect);
     bool filterImageGeneric(Proc procX, Proc procY,
                             Proxy*, const SkBitmap& src, const SkMatrix&,
                             SkBitmap* result, SkIPoint* offset) const;
     SkMorphologyImageFilter(SkReadBuffer& buffer);
     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
 #if SK_SUPPORT_GPU
     virtual bool canFilterImageGPU() const SK_OVERRIDE { return true; }
     bool filterImageGPUGeneric(bool dilate, Proxy* proxy, const SkBitmap& src,
                                const SkMatrix& ctm, SkBitmap* result,
                                SkIPoint* offset) const;
 #endif
 
     SkISize    radius() const { return fRadius; }
 
 private:
     SkISize    fRadius;
     typedef SkImageFilter INHERITED;
 };
 
 class SK_API SkDilateImageFilter : public SkMorphologyImageFilter {
 public:
-    SkDilateImageFilter(int radiusX, int radiusY,
-                        SkImageFilter* input = NULL,
-                        const CropRect* cropRect = NULL)
-    : INHERITED(radiusX, radiusY, input, cropRect) {}
+    static SkDilateImageFilter* Create(int radiusX, int radiusY,
+                                       SkImageFilter* input = NULL,
+                                       const CropRect* cropRect = NULL) {
+        return SkNEW_ARGS(SkDilateImageFilter, (radiusX, radiusY, input, cropRect));
+    }
 
     virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
                                SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;
 #if SK_SUPPORT_GPU
     virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
                                 SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;
 #endif
 
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDilateImageFilter)
 
 protected:
     SkDilateImageFilter(SkReadBuffer& buffer) : INHERITED(buffer) {}
 
+#ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS
+public:
+#endif
+    SkDilateImageFilter(int radiusX, int radiusY,
+                        SkImageFilter* input = NULL,
+                        const CropRect* cropRect = NULL)
+    : INHERITED(radiusX, radiusY, input, cropRect) {}
+
 private:
     typedef SkMorphologyImageFilter INHERITED;
 };
 
 class SK_API SkErodeImageFilter : public SkMorphologyImageFilter {
 public:
-    SkErodeImageFilter(int radiusX, int radiusY,
-                       SkImageFilter* input = NULL,
-                       const CropRect* cropRect = NULL)
-    : INHERITED(radiusX, radiusY, input, cropRect) {}
+    static SkErodeImageFilter* Create(int radiusX, int radiusY,
+                                      SkImageFilter* input = NULL,
+                                      const CropRect* cropRect = NULL) {
+        return SkNEW_ARGS(SkErodeImageFilter, (radiusX, radiusY, input, cropRect));
+    }
 
     virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
                                SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;
 #if SK_SUPPORT_GPU
     virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
                                 SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;
 #endif
 
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkErodeImageFilter)
 
 protected:
     SkErodeImageFilter(SkReadBuffer& buffer) : INHERITED(buffer) {}
 
+#ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS
+public:
+#endif
+    SkErodeImageFilter(int radiusX, int radiusY,
+                       SkImageFilter* input = NULL,
+                       const CropRect* cropRect = NULL)
+    : INHERITED(radiusX, radiusY, input, cropRect) {}
+
 private:
     typedef SkMorphologyImageFilter INHERITED;
 };
 
 #endif