s/sk_tools::DrawCheckerboard/sk_tool_utils::draw_checkerboard/

tools/sk_tool_utils.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef sk_tool_utils_DEFINED
 #define sk_tool_utils_DEFINED
 
+#include "SkColor.h"
 #include "SkImageInfo.h"
 #include "SkTypeface.h"
 
 class SkBitmap;
 class SkCanvas;
 class SkPaint;
+class SkShader;
 class SkTestFont;
 
 namespace sk_tool_utils {
 
     const char* colortype_name(SkColorType);
 
     /**
      * Sets the paint to use a platform-independent text renderer.
      */
     void set_portable_typeface(SkPaint* paint, const char* name = NULL,
                                SkTypeface::Style style = SkTypeface::kNormal);
     SkTypeface* create_portable_typeface(const char* name, SkTypeface::Style style);
     void report_used_chars();
 
     /**
      *  Call canvas->writePixels() by using the pixels from bitmap, but with an info that claims
      *  the pixels are colorType + alphaType
      */
     void write_pixels(SkCanvas*, const SkBitmap&, int x, int y, SkColorType, SkAlphaType);
 
     // private to sk_tool_utils
     SkTypeface* create_font(const char* name, SkTypeface::Style );
     SkTypeface* resource_font(const char* name, SkTypeface::Style );
 
+    /** Returns a newly created CheckerboardShader. */
+    SkShader* create_checkerboard_shader(SkColor c1, SkColor c2, int size);
+
+    /** Draw a checkerboard pattern in the current canvas, restricted to
+        the current clip. */
+    void draw_checkerboard(SkCanvas* canvas,
+                           SkColor color1,
+                           SkColor color2,
+                           int size);
+
+    /** A default checkerboard. */
+    inline void draw_checkerboard(SkCanvas* canvas) {
+        sk_tool_utils::draw_checkerboard(canvas, 0xFF999999, 0xFF666666, 8);
+    }
+
 }  // namespace sk_tool_utils
 
 #endif  // sk_tool_utils_DEFINED