private static extern bool StretchBlt(
IntPtr destDC,
int dX,
int dY,
int dWidth,
int dHeight,
IntPtr sourceDC,
int sX,
int sY,
int sWidth,
int sHeight,
RasterOperations ro);
private static extern bool BitBlt(
IntPtr targetDC,
int targetX,
int targetY,
int targetWidth,
int targetHeight,
IntPtr sourceDC,
int sourceStartX,
int sourceStartY,
RasterOperations ro);
private static Image CaptureScreenRegion( Point location, Size size, RasterOperations opcode )
{
Image myImage = new Bitmap( size.Width, size.Height );
using ( Graphics g = Graphics.FromImage( myImage ) ) {
IntPtr destDeviceContext = g.GetHdc();
IntPtr srcDeviceContext = GetWindowDC( IntPtr.Zero ); // capture desktop
// TODO: throw exception
if ( !BitBlt( destDeviceContext, 0, 0, size.Width, size.Height, srcDeviceContext, location.X, location.Y, opcode ) ) {
// throw exception
}
ReleaseDC( IntPtr.Zero, srcDeviceContext );
g.ReleaseHdc( destDeviceContext );
} // dispose the Graphics object
return myImage;
}
/// <summary>
/// Bitblt extension for the graphics object
/// </summary>
/// <param name="target">Graphics</param>
/// <param name="sourceBitmap">Bitmap</param>
/// <param name="source">Rectangle</param>
/// <param name="destination">Point</param>
/// <param name="rasterOperations">RasterOperations</param>
public static void BitBlt(this Graphics target, Bitmap sourceBitmap, Rectangle source, NativePoint destination, RasterOperations rasterOperations)
{
using (var targetDc = target.GetSafeDeviceContext())
using (var safeCompatibleDcHandle = CreateCompatibleDC(targetDc))
using (var hBitmapHandle = new SafeHBitmapHandle(sourceBitmap.GetHbitmap()))
using (safeCompatibleDcHandle.SelectObject(hBitmapHandle))
{
BitBlt(targetDc, destination.X, destination.Y, source.Width, source.Height, safeCompatibleDcHandle, source.Left, source.Top, rasterOperations);
}
}
public static Image StretchImage( Point p, Rectangle zoomRegion, Size desiredSize, RasterOperations opcode, bool captureLayeredWindows )
{
Image myImage = new Bitmap( desiredSize.Width, desiredSize.Height );
using ( Graphics g = Graphics.FromImage( myImage ) ) {
IntPtr destDeviceContext = g.GetHdc();
IntPtr srcDeviceContext = GetWindowDC( IntPtr.Zero ); // capture desktop
StretchBlt( destDeviceContext, 0, 0, desiredSize.Width, desiredSize.Height, srcDeviceContext, p.X, p.Y, zoomRegion.Width, zoomRegion.Height, opcode );
// StretchBlt( destDeviceContext, 0, 0, desiredSize.Width, desiredSize.Height, srcDeviceContext, p.X, p.Y, zoomRegion.Width, zoomRegion.Height, SRCCOPY | CAPTUREBLT );
//Debug.WriteLine( "Error: " + Marshal.GetLastWin32Error() );
ReleaseDC( IntPtr.Zero, srcDeviceContext );
g.ReleaseHdc( destDeviceContext );
} // dispose the Graphics object
return myImage;
}
public static extern bool BitBlt(SafeHandle hdcDest, int nXDest, int nYDest, int nWidth, int nHeight, SafeHandle hdcSrc, int nXSrc, int nYSrc, RasterOperations rasterOperation);
public static extern bool StretchBlt(SafeHandle hdcDest, int nXOriginDest, int nYOriginDest, int nWidthDest, int nHeightDest, SafeHandle hdcSrc, int nXOriginSrc, int nYOriginSrc, int nWidthSrc, int nHeightSrc, RasterOperations rasterOperation);
public static Image StretchImage(Point p, Rectangle zoomRegion, Size desiredSize, RasterOperations opcode, bool captureLayeredWindows)
{
Image myImage = new Bitmap(desiredSize.Width, desiredSize.Height);
using (Graphics g = Graphics.FromImage(myImage)) {
IntPtr destDeviceContext = g.GetHdc();
IntPtr srcDeviceContext = GetWindowDC(IntPtr.Zero); // capture desktop
StretchBlt(destDeviceContext, 0, 0, desiredSize.Width, desiredSize.Height, srcDeviceContext, p.X, p.Y, zoomRegion.Width, zoomRegion.Height, opcode);
// StretchBlt( destDeviceContext, 0, 0, desiredSize.Width, desiredSize.Height, srcDeviceContext, p.X, p.Y, zoomRegion.Width, zoomRegion.Height, SRCCOPY | CAPTUREBLT );
//Debug.WriteLine( "Error: " + Marshal.GetLastWin32Error() );
ReleaseDC(IntPtr.Zero, srcDeviceContext);
g.ReleaseHdc(destDeviceContext);
} // dispose the Graphics object
return(myImage);
}
public static extern bool BitBlt(IntPtr hdcDest, int nxDest, int nyDest, int nWidth, int nHeight, IntPtr hdcSrc, int nXSrc, int nYSrc, RasterOperations dwRop);
public static extern bool BitBlt([In] IntPtr hdc, int nXDest, int nYDest, int nWidth, int nHeight,
[In] IntPtr hdcSrc, int nXSrc, int nYSrc, RasterOperations dwRop);
