问如何释放由Gdiplus：：位图：：FromFile分配的内存

EN

#include <windows.h>

#ifdef max
#undef max
#endif
#ifdef min
#undef min
#endif

namespace Gdiplus
{
    using std::min;
    using std::max;
}
#include <gdiplus.h>
#pragma comment (lib,"Gdiplus.lib")

namespace Infra
{
    namespace Color
    {
        //more app code


        void CrashingMethod(...)
        {
            Gdiplus::Bitmap* bitmap = Gdiplus::Bitmap::FromFile(PNG_PATH);

            //read bitmap
            int qpWidth = frameWidth / 16;
            Gdiplus::Color color = Gdiplus::Color();

            for (unsigned int y = 0, qy = (frameHeight / 16) - 1; y < frameHeight; y += 16, qy--)
            {
                for (unsigned int x = 0, qx = 0; x < frameWidth; x += 16, qx++)
                {
                    bitmap->GetPixel(x, y, &color);

                    byte red = color.GetRed();

                    //do stuff with the red channel

                }
            }

            delete bitmap; //this line will randomly crash. Not always, not in all machines
            bitmap = NULL;
        }
    }


    }
}