private void btnCapture_Click(object sender, EventArgs e)
{
isg.GetConnectedMediaType(ref SGMediaType);
VIDEOINFOHEADER vih = (VIDEOINFOHEADER)Marshal.PtrToStructure(SGMediaType.pbFormat,
typeof(VIDEOINFOHEADER));
// Get a copy of the BITMAPINFOHEADER, to be used in the BITMAPFILEHEADER
BITMAPINFOHEADER bih = vih.BitmapInfo;
int len = (int)BitmapSize(bih);
// Allocate bytes, plus room for a BitmapFileHeader
int sizeOfBFH = Marshal.SizeOf(typeof(BITMAPFILEHEADER));
int sizeOfBIH = Marshal.SizeOf(typeof(BITMAPINFOHEADER));
IntPtr ptrBlock = Marshal.AllocCoTaskMem(len + sizeOfBFH + sizeOfBIH);
IntPtr ptrBIH = new IntPtr(ptrBlock.ToInt64() + sizeOfBFH);
IntPtr ptrImg = new IntPtr(ptrBlock.ToInt64() + sizeOfBFH + sizeOfBIH);
try
{
// Get the DIB
isg.GetCurrentBuffer(ref len, ptrImg);
// Create header for a file of type .bmp
BITMAPFILEHEADER bfh = new BITMAPFILEHEADER();
bfh.Type = (UInt16)((((byte)'M') << 8) | ((byte)'B'));
bfh.Size = (uint)(len + sizeOfBFH + sizeOfBIH);
bfh.Reserved1 = 0;
bfh.Reserved2 = 0;
bfh.OffBits = (uint)(sizeOfBFH + sizeOfBIH);
// Copy the BFH into unmanaged memory, so that we can copy
// everything into a managed byte array all at once
Marshal.StructureToPtr(bfh, ptrBlock, false);
Marshal.StructureToPtr(bih, ptrBIH, false);
// Pull it out of unmanaged memory into a managed byte[]
byte[] img = new byte[len + sizeOfBFH + sizeOfBIH];
Marshal.Copy(ptrBlock, img, 0, len + sizeOfBFH + sizeOfBIH);
//System.IO.File.WriteAllBytes("cxp.bmp", img);
System.IO.MemoryStream m = new System.IO.MemoryStream(img);
this.m_Image = Image.FromStream(m);
this.DialogResult = DialogResult.OK;
}
finally
{
// Free the unmanaged memory
if (ptrBlock != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(ptrBlock);
}
this.Close();
}
}
private void btnCapture_Click(object sender, EventArgs e)
{
isg.GetConnectedMediaType(ref SGMediaType);
VIDEOINFOHEADER vih = (VIDEOINFOHEADER)Marshal.PtrToStructure(SGMediaType.pbFormat,
typeof(VIDEOINFOHEADER));
// Get a copy of the BITMAPINFOHEADER, to be used in the BITMAPFILEHEADER
BITMAPINFOHEADER bih = vih.BitmapInfo;
int len = (int)BitmapSize(bih);
// Allocate bytes, plus room for a BitmapFileHeader
int sizeOfBFH = Marshal.SizeOf(typeof(BITMAPFILEHEADER));
int sizeOfBIH = Marshal.SizeOf(typeof(BITMAPINFOHEADER));
IntPtr ptrBlock = Marshal.AllocCoTaskMem(len + sizeOfBFH + sizeOfBIH);
IntPtr ptrBIH = new IntPtr(ptrBlock.ToInt64() + sizeOfBFH);
IntPtr ptrImg = new IntPtr(ptrBlock.ToInt64() + sizeOfBFH + sizeOfBIH);
try
{
// Get the DIB
isg.GetCurrentBuffer(ref len, ptrImg);
// Create header for a file of type .bmp
BITMAPFILEHEADER bfh = new BITMAPFILEHEADER();
bfh.Type = (UInt16)((((byte)'M') << 8) | ((byte)'B'));
bfh.Size = (uint)(len + sizeOfBFH + sizeOfBIH);
bfh.Reserved1 = 0;
bfh.Reserved2 = 0;
bfh.OffBits = (uint)(sizeOfBFH + sizeOfBIH);
// Copy the BFH into unmanaged memory, so that we can copy
// everything into a managed byte array all at once
Marshal.StructureToPtr(bfh, ptrBlock, false);
Marshal.StructureToPtr(bih, ptrBIH, false);
// Pull it out of unmanaged memory into a managed byte[]
byte[] img = new byte[len + sizeOfBFH + sizeOfBIH];
Marshal.Copy(ptrBlock, img, 0, len + sizeOfBFH + sizeOfBIH);
//System.IO.File.WriteAllBytes("cxp.bmp", img);
System.IO.MemoryStream m = new System.IO.MemoryStream(img);
this.m_Image = Image.FromStream(m);
this.DialogResult = DialogResult.OK;
}
finally
{
// Free the unmanaged memory
if (ptrBlock != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(ptrBlock);
}
this.Close();
}
}
