Make piece bitmaps larger and crisper

[Don Cross]

The 1990s graphics are really starting to show their age. I will replace them with larger and crisper bitmaps. I don't think I need multiple piece styles any more, just the one that most people seem to use in modern chess programs.

Bonus points if I can:

• rework move animation to show pieces sliding rather than blinking (requires transparent areas on the bitmaps).
• allow the user to drag pieces instead of just clicking on source and destination squares (ditto for transparency).
• resize the board dynamically to any size by dragging the corner of the window.

[Don Cross]

I found the following from

https://stackoverflow.com/questions/3988484/how-to-load-a-png-resource-into-picture-control-on-a-dialog-box/24571173

I'm hoping it gives me a clue for how to load from a PNG with a transparent background into an old-style Windows program.

bool GdiPlusUtils::LoadBitmapFromPNG(UINT uResourceID, 
    Bitmap** ppBitmapOut, HINSTANCE hInstance /*= NULL*/)
{
    bool bRet = false;

    if (!hInstance)
        hInstance = AfxGetInstanceHandle();

    HRSRC hResourceHandle = ::FindResource(
        hInstance, MAKEINTRESOURCE(uResourceID), L"PNG");
    if (0 == hResourceHandle)
    {
        return bRet;
    }

    DWORD nImageSize = ::SizeofResource(hInstance, hResourceHandle);
    if (0 == nImageSize)
    {
        return bRet;
    }

    HGLOBAL hResourceInstance = ::LoadResource(hInstance, hResourceHandle);
    if (0 == hResourceInstance)
    {
        return bRet;
    }
     const void* pResourceData = ::LockResource(hResourceInstance);
    if (0 == pResourceData)
    {
        FreeResource(hResourceInstance);
        return bRet;
    }

    HGLOBAL hBuffer = ::GlobalAlloc(GMEM_MOVEABLE, nImageSize);
    if (0 == hBuffer)
    {
        FreeResource(hResourceInstance);
        return bRet;
    }

    void* pBuffer = ::GlobalLock(hBuffer);
    if (0 != pBuffer)
    {
        CopyMemory(pBuffer, pResourceData, nImageSize);
        IStream* pStream = 0;
        if (S_OK == ::CreateStreamOnHGlobal(hBuffer, FALSE, &pStream))
        {
            *ppBitmapOut = new Bitmap(pStream);
            pStream->Release();
            bRet = true;
        }
        ::GlobalUnlock(hBuffer);
    }
    ::GlobalFree(hBuffer);

    UnlockResource(hResourceInstance);
    FreeResource(hResourceInstance);

    return bRet;
}

[Don Cross]

Fixed in 053bb7e .