Get Mac viewer working with SDL

example/SkiaSDLExample.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  */
 
 #include "GrContext.h"
 #include "SDL.h"
 #include "SkCanvas.h"
 #include "SkRandom.h"
 #include "SkSurface.h"
 
 #include "gl/GrGLInterface.h"
 #include "gl/GrGLUtil.h"
 
 #if defined(SK_BUILD_FOR_ANDROID)
 #include <GLES/gl.h>
 #elif defined(SK_BUILD_FOR_UNIX)
 #include <GL/gl.h>
 #elif defined(SK_BUILD_FOR_MAC)
-#include <gl.h>
+#include <OpenGL/gl.h>
 #endif
 
 /*
  * This application is a simple example of how to combine SDL and Skia it demonstrates:
  *   how to setup gpu rendering to the main window
  *   how to perform cpu-side rendering and draw the result to the gpu-backed screen
  *   draw simple primitives (rectangles)
  *   draw more complex primitives (star)
  */
 
@@ skipping 183 matching lines @@
 
     SkCanvas* canvas = surface->getCanvas();
 
     ApplicationState state;
 
     const char* helpMessage = "Click and drag to create rects.  Press esc to quit.";
 
     SkPaint paint;
 
     // create a surface for CPU rasterization
-    SkAutoTUnref<SkSurface> cpuSurface(SkSurface::NewRaster(canvas->imageInfo()));
+    sk_sp<SkSurface> cpuSurface(SkSurface::MakeRaster(canvas->imageInfo()));
 
     SkCanvas* offscreen = cpuSurface->getCanvas();
     offscreen->save();
     offscreen->translate(50.0f, 50.0f);
     offscreen->drawPath(create_star(), paint);
     offscreen->restore();
 
-    SkAutoTUnref<SkImage> image(cpuSurface->newImageSnapshot());
+    sk_sp<SkImage> image = cpuSurface->makeImageSnapshot();
 
     int rotation = 0;
     while (!state.fQuit) { // Our application loop
         SkRandom rand;
         canvas->clear(SK_ColorWHITE);
         handle_events(&state, canvas);
 
         paint.setColor(SK_ColorBLACK);
         canvas->drawText(helpMessage, strlen(helpMessage), SkIntToScalar(100),
                          SkIntToScalar(100), paint);
@@ skipping 17 matching lines @@
         SDL_GL_DeleteContext(glContext);
     }
 
     //Destroy window
     SDL_DestroyWindow(window);
 
     //Quit SDL subsystems
     SDL_Quit();
     return 0;
 }