public unsafe NativeBitmapInfoHandle(ref BitmapInfo bitmapInfo) : base(new IntPtr(0))
{
var quads = bitmapInfo.Colors;
var quadsLength = quads.Length;
if (quadsLength == 0)
{
quadsLength = 1;
}
var success = false;
var ptr = IntPtr.Zero;
try
{
ptr = Marshal.AllocHGlobal(Marshal.SizeOf <BitmapInfoHeader>() + Marshal.SizeOf <RgbQuad>() * quadsLength);
var headerPtr = (BitmapInfoHeader *)ptr.ToPointer();
* headerPtr = bitmapInfo.Header;
var quadPtr = (RgbQuad *)(headerPtr + 1);
var i = 0;
for (; i < quads.Length; i++)
{
*(quadPtr + i) = quads[i];
}
if (i == 0)
{
*quadPtr = new RgbQuad();
}
this.SetHandle(ptr);
success = true;
}
finally
{
if (!success)
{
SetHandleAsInvalid();
Marshal.FreeHGlobal(ptr);
}
}
}
public static NativeBitmapInfoHandle NativeAlloc(ref BitmapInfo bitmapInfo)
{
return(new NativeBitmapInfoHandle(ref bitmapInfo));
}
