add gm: colorwheel

gm/gm.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef skiagm_DEFINED
 #define skiagm_DEFINED
 
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkPaint.h"
 #include "SkSize.h"
 #include "SkString.h"
 #include "SkTRegistry.h"
 #include "sk_tool_utils.h"
 
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
 #endif
 
 #define DEF_GM(code) \
     static skiagm::GM*          SK_MACRO_APPEND_LINE(F_)(void*) { code; } \
     static skiagm::GMRegistry   SK_MACRO_APPEND_LINE(R_)(SK_MACRO_APPEND_LINE(F_));
 
+#define DEF_SIMPLE_GM(F, W, H)                                          \

[mtklein, 2014/10/24 16:47:48]

Let's do this like DEF_TEST?

#define DEF_SIMPLE_GM(NAME, CANVAS, W, H)
   class SK_MACRO_CONCAT(NAME, _GM) : public skiagm::GM {
     void onDraw(SkCanvas*) SK_OVERRIDE:
      ....
   };
   DEF_GM(...);
   void SK_MACRO_CONCAT(NAME, _GM)::onDraw(SkCanvas* CANVAS)

[hal.canary, 2014/10/24 17:22:01]

Done.

+    class SK_MACRO_CONCAT(F, _GM) : public skiagm::GM {                 \
+    protected:                                                          \
+        virtual void onDraw(SkCanvas* canvas) { (F)(canvas); }          \
+        virtual SkISize onISize() { return SkISize::Make((W), (H)); }   \
+        virtual SkString onShortName() { return SkString(#F); }         \
+    };                                                                  \
+    DEF_GM( return SkNEW(SK_MACRO_CONCAT(F, _GM)); )
+
 namespace skiagm {
 
     class GM {
     public:
         GM();
         virtual ~GM();
 
         enum Flags {
             kSkipPDF_Flag               = 1 << 0,
             kSkipPicture_Flag           = 1 << 1,
@@ skipping 81 matching lines @@
         SkColor  fBGColor;
         bool     fCanvasIsDeferred; // work-around problem in srcmode.cpp
         bool     fHaveCalledOnceBeforeDraw;
         SkMatrix fStarterMatrix;
     };
 
     typedef SkTRegistry<GM*(*)(void*)> GMRegistry;
 }
 
 #endif