Using skia on windows

#include <string>
#include <fstream>

#include "SkCanvas.h"
#include "SkData.h"
#include "SkDocument.h"
#include "SkGraphics.h"
#include "SkSurface.h"
#include "SkImage.h"
#include "SkStream.h"
#include "SkString.h"

#include "..\effects\SkGradientShader.h"

void save_ppm(SkBitmap const& bitmap, std::string const& filename)
{
  SkAutoLockPixels l(bitmap);

  std::ofstream ofile(filename.c_str(), std::ios_base::binary | std::ios_base::trunc);
  if (ofile.is_open())
  {
    ofile << "P6 " << bitmap.width() << " " << bitmap.height() << " 255 ";

    for (int i = 0; i != bitmap.height(); i++)
    {
      for (int j = 0; j != bitmap.width(); j++)
      {
        SkColor const* c = bitmap.getAddr32(j, i);
        char buf[3] = { SkColorGetR(*c), SkColorGetG(*c), SkColorGetB(*c) };
        ofile.write(buf, 3);
      }
    }
  }
}

void TestSkia(SkCanvas& canvas)
{
  SkPaint paint;
  paint.setAntiAlias(true);
  paint.setColor(SK_ColorRED);
  SkRect rect = {
    20, 20,
    50, 50
  };
  canvas.drawRect(rect, paint);
}

int main(int argc, char * const argv[])
{
  SkAutoGraphics ag;
  SkBitmap bitmap;
  int width = 800;
  int height = 600;
  bitmap.allocPixels(SkImageInfo::MakeN32Premul(width, height));
  SkCanvas canvas(bitmap);
  canvas.drawColor(SK_ColorWHITE);

  TestSkia(canvas);

  save_ppm(bitmap, "out.ppm");
  return 0;
}

// stub out openGl dependency, which isn't needed in this case.
extern "C"
{
#ifdef _WIN64
  PROC WINAPI __imp_wglGetProcAddress(LPCSTR)
  {
    abort();
    return nullptr;
  }
  
  HGLRC WINAPI  __imp_wglGetCurrentContext()
  {
    abort();
    return nullptr;
  }
#else
  PROC WINAPI _imp__wglGetProcAddress(LPCSTR)
  {
    abort();
    return nullptr;
  }

  HGLRC WINAPI _imp__wglGetCurrentContext()
  {
    abort();
    return nullptr;
  }
#endif
}