protected override IntPtr CreatePixmapHandle(int width, int height, BitCount bitsperpixel)
{
//Orientation = orient;
PixmapOrientation orient = PixmapOrientation.BottomToTop;
// Create a bitmap compatible with the screen
fBitmapInfo = new BITMAPINFO();
fBitmapInfo.Init();
m_BytesPerRow = GDIPixmap.GetAlignedRowStride(Width, bitsperpixel, Alignment);
fBitmapInfo.bmiHeader.biWidth = Width;
if (PixmapOrientation.TopToBottom == orient)
fBitmapInfo.bmiHeader.biHeight = -Height; // Indicates a top-to-bottom orientation
else
fBitmapInfo.bmiHeader.biHeight = Height;
fBitmapInfo.bmiHeader.biPlanes = 1;
fBitmapInfo.bmiHeader.biBitCount = (ushort)bitsperpixel;
fBitmapInfo.bmiHeader.biSizeImage = (uint)(m_BytesPerRow * Height);
fBitmapInfo.bmiHeader.biClrImportant = 0;
fBitmapInfo.bmiHeader.biClrUsed = 0;
fBitmapInfo.bmiHeader.biCompression = GDI32.BI_RGB;
//fBitmapInfo.bmiColors = IntPtr.Zero;
m_pixelPointer = IntPtr.Zero;
IntPtr bitmapHandle = GDI32.CreateDIBSection(GDIContext.CreateForDefaultDisplay(),
ref fBitmapInfo, GDI32.DIB_RGB_COLORS, ref m_pixelPointer, IntPtr.Zero, 0);
return bitmapHandle;
}
public static BITMAPINFO ToBitmapInfo(this PixelRectangleInfo pixmap)
{
BITMAPINFO bmi = new BITMAPINFO();
bmi.Init();
bmi.bmiHeader.biBitCount = (ushort)pixmap.BitsPerPixel;
bmi.bmiHeader.biWidth = pixmap.Width;
if (pixmap.Orientation == PixmapOrientation.TopToBottom)
bmi.bmiHeader.biHeight = -pixmap.Height;
else
bmi.bmiHeader.biHeight = pixmap.Height;
bmi.bmiHeader.biSizeImage = (uint)pixmap.GetImageSize();
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biClrImportant = 0;
bmi.bmiHeader.biClrUsed = 0;
bmi.bmiHeader.biCompression = 0;
return bmi;
}
public Form1()
:base("GDI Video", 10, 10, 1024, 480)
{
fScreenContext = GDIContext.CreateForDefaultDisplay();
fCamera = new VfwCameraDevice(0, 320, 240, 15, User32.WS_CHILD | User32.WS_VISIBLE, this.Handle);
//fCamera = new VfwCameraDevice(320, 240);
fCamera.FrameDelegate = FrameReceived;
fBitmapInfo = fCamera.GetBitmapInfo();
fDecompressor = VfwDeCompressor.Create(Vfw.ICTYPE_VIDEO);
// Allocate a pixel buffer to receive decompressed bits
//fPixelBuffer = new PixelBuffer24(fCamera.Width, fCamera.Height);
//fCamera.StartStreaming();
fCamera.PreviewRate = 33;
//fCamera.ShowPreviewWindow();
fCaptureDispatcher = new TimedDispatcher(1.0 / 15, CaptureFrame, null);
fCaptureDispatcher.Start();
}
void ConfigureVideoFormat()
{
fBitmapInfo = new BITMAPINFO();
fBitmapInfo.Init();
fBitmapInfo.bmiHeader = new BITMAPINFOHEADER();
fBitmapInfo.bmiHeader.Init();
// Get the current format information
int formatSize = capGetVideoFormatSize();
capGetVideoFormat(ref fBitmapInfo);
PrintCompressionType(fBitmapInfo.bmiHeader.biCompression);
// Fill in the things we want to change
fBitmapInfo.bmiHeader.biWidth = Width;
fBitmapInfo.bmiHeader.biHeight = Height;
fBitmapInfo.bmiHeader.biPlanes = 1;
fBitmapInfo.bmiHeader.biBitCount = 24; // 24 bits per frame - RGB
fBitmapInfo.bmiHeader.biCompression = GDI32.BI_RGB;
// Try to set the video format
bool setSuccess = capSetVideoFormat(ref fBitmapInfo);
// Get the settings again, and set the width
// and height based on what was actually set
capGetVideoFormat(ref fBitmapInfo);
Width = fBitmapInfo.bmiHeader.biWidth;
Height = fBitmapInfo.bmiHeader.biHeight;
}
public virtual int PixelBlt(Rectangle srcRect, Rectangle dstRect, IntPtr pixelPtr, BitCount bitsPerPixel)
{
BITMAPINFO bmInfo = new BITMAPINFO();
bmInfo.Init();
bmInfo.bmiHeader.biWidth = srcRect.Width;
bmInfo.bmiHeader.biHeight = srcRect.Height;
bmInfo.bmiHeader.biPlanes = 1;
bmInfo.bmiHeader.biBitCount = (ushort)bitsPerPixel;
bmInfo.bmiHeader.biClrImportant = 0;
bmInfo.bmiHeader.biClrUsed = 0;
bmInfo.bmiHeader.biCompression = GDI32.BI_RGB;
//bmInfo.bmiColors = IntPtr.Zero;
int rowsWritten = GDI32.StretchDIBits(this,
dstRect.X, dstRect.Y, dstRect.Width, dstRect.Height,
srcRect.X, srcRect.Y, srcRect.Width, srcRect.Height,
pixelPtr,
ref bmInfo,
GDI32.DIB_RGB_COLORS,
(uint)TernaryRasterOps.SRCCOPY);
return rowsWritten;
}
public static extern int SendMessageW([In] IntPtr hWnd, int Msg, uint wParam, ref BITMAPINFO caps);
protected bool capSetVideoFormat(ref BITMAPINFO s)
{
int wSize = Marshal.SizeOf(s);
bool success = 1 == SendMessageW(fWindowHandle, Vfw.WM_CAP_SET_VIDEOFORMAT, (uint)wSize, ref s);
return success;
}
/// <summary>
/// Retrieves a copy of the video format information.
/// </summary>
/// <param name="s"></param>
/// <returns>Returns 0 if not connected to driver.</returns>
protected int capGetVideoFormat(ref BITMAPINFO s)
{
int wSize = Marshal.SizeOf(s);
int bytesCopied = SendMessageW(fWindowHandle, Vfw.WM_CAP_GET_VIDEOFORMAT, (uint)wSize, ref s);
return bytesCopied;
}
// Generalized bit block transfer
// Can transfer from any device context to this one.
public virtual void PixBlt(IPixelArray pixmap, int x, int y)
{
if (null == pixmap)
return;
BITMAPINFO bmi = new BITMAPINFO();
bmi.Init();
bmi.bmiHeader.biBitCount = (ushort)pixmap.BitsPerPixel;
bmi.bmiHeader.biWidth = pixmap.Width;
if (pixmap.Orientation == PixmapOrientation.TopToBottom)
bmi.bmiHeader.biHeight = -pixmap.Height;
else
bmi.bmiHeader.biHeight = pixmap.Height;
bmi.bmiHeader.biSizeImage = (uint)(pixmap.BytesPerRow * pixmap.Height);
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biClrImportant = 0;
bmi.bmiHeader.biClrUsed = 0;
bmi.bmiHeader.biCompression = 0;
int result = GDI32.StretchDIBits(DeviceContext, x, y, pixmap.Width, pixmap.Height, 0, 0, pixmap.Width, pixmap.Height, pixmap.Pixels,
ref bmi, GDI32.DIB_RGB_COLORS, (uint)TernaryRasterOps.SRCCOPY);
//Console.WriteLine("Result: {0}", result);
}
