/// <summary>
/// Highlights the specified window just like Spy++
/// </summary>
/// <param name="hWnd"></param>
public static void Highlight(IntPtr hWnd)
{
const float penWidth = 30;
WinApi.User32.RECT clientRect = new WinApi.User32.RECT();
WinApi.User32.RECT windowRect = new WinApi.User32.RECT();
Point clientPoint = new Point();
WinApi.User32.GetClientRect(hWnd, ref clientRect);
WinApi.User32.GetWindowRect(hWnd, ref windowRect);
WinApi.User32.ClientToScreen(hWnd, ref clientPoint);
clientRect.left = (int)clientPoint.X - windowRect.left;
clientRect.top = (int)clientPoint.Y - windowRect.top;
clientRect.right += clientRect.left;
clientRect.bottom += clientRect.top;
IntPtr hDC = WinApi.User32.GetWindowDC(hWnd);
if (hDC != IntPtr.Zero)
{
using (Pen pen = new Pen(Color.Blue, penWidth))
{
using (Graphics g = Graphics.FromHdc(hDC))
{
g.DrawRectangle(pen, clientRect.left, clientRect.top, clientRect.Width, clientRect.Height);
}
}
}
WinApi.User32.ReleaseDC(hWnd, hDC);
}
// TODO: Try http://msdn.microsoft.com/en-us/library/windows/desktop/dd144873%28v=vs.85%29.aspx
public ImageData CaptureWindow(IntPtr windowHandle)
{
try
{
ImageData imageData = new ImageData {Data = null};
#region GetWindowRect
var windowRect = new WinApi.User32.RECT();
WinApi.User32.GetWindowRect(windowHandle, ref windowRect);
int width = windowRect.Width;
int height = windowRect.Height;
imageData.WindowRect = new CollabPacket.BoundingBox
{
Top = windowRect.top,
Bottom = windowRect.bottom,
Left = windowRect.left,
Right = windowRect.right
};
#endregion
// Create and setup the bitmap
IntPtr displayDc = WinApi.User32.GetWindowDC(windowHandle);
// Setup the bitmap
IntPtr bitmapDc = WinApi.Gdi32.CreateCompatibleDC(displayDc);
IntPtr bitmap = WinApi.Gdi32.CreateCompatibleBitmap(displayDc, width, height);
IntPtr nullBitmap = WinApi.Gdi32.SelectObject(bitmapDc, bitmap);
IntPtr windowDc = WinApi.User32.GetWindowDC(windowHandle);
// Copy data from the windowDC to the bitmapDC
// startx, starty, endx, endy, cropx, cropy
WinApi.Gdi32.BitBlt(bitmapDc, 0, 0, width, height, windowDc, 0, 0, WinApi.Gdi32.SRCCOPY /*| WinApi.Gdi32.CAPTUREBLT*/);
WinApi.User32.ReleaseDC(windowHandle, windowDc);
WinApi.Gdi32.SelectObject(bitmapDc, nullBitmap);
WinApi.Gdi32.DeleteDC(bitmapDc);
// Get a Bitmap object from the bitmap's handle
_newImage = Image.FromHbitmap(bitmap);
// Delete bitmap and release the Display DC
WinApi.Gdi32.DeleteObject(bitmap);
WinApi.User32.ReleaseDC(windowHandle, displayDc);
if (_previousImage != null)
{
// Check if the window/source has been resized and call a PrintWindow to repaint the borders via forcing a WM_PAINT
if (_previousImage.Width != _newImage.Width || _previousImage.Height != _newImage.Height ||_previousImage.PixelFormat != _newImage.PixelFormat)
{
WinApi.User32.PrintWindow(windowHandle, windowDc, 0);
}
imageData.BoundingBox = ImageManipulation.GetBoundingBoxForChanges(ref _previousImage, ref _newImage);
if (imageData.BoundingBox == Rectangle.Empty)
{
return imageData;
}
Bitmap b = new Bitmap(imageData.BoundingBox.Width, imageData.BoundingBox.Height);
using (var g = Graphics.FromImage(b))
{
// TODO: try performance of both methods
g.DrawImage(_newImage, 0, 0, imageData.BoundingBox, GraphicsUnit.Pixel);
//g.DrawImage(_newImage, -_boundingBox.X, -_boundingBox.Y);
}
_previousImage = _newImage;
using (var ms = new MemoryStream())
{
b.Save(ms, ImageFormatSetting);
b.Dispose();
imageData.Data = ms.ToArray();
return imageData;
}
}
_previousImage = _newImage;
imageData.BoundingBox = new Rectangle(0, 0, _newImage.Width, _newImage.Height);
using (var ms = new MemoryStream())
{
_newImage.Save(ms, ImageFormatSetting);
imageData.Data = ms.ToArray();
return imageData;
}
}
catch (Exception ex)
{
Globals.DebugConsole.Log("GDI Error: " + ex.Message);
ImageData imageData = new ImageData {Data = Encoding.UTF8.GetBytes("ERROR")};
return imageData;
}
}
// This is something I've been working on reading WinApi docs.. it doesnt use BitBlt at all. Trying to get borders to show on Vista+
// This uses PrintWindow instead of BitBlt
public byte[] CaptureWindowVista(IntPtr windowHandle, ImageFormat format)
{
try
{
// Initalize variables
IntPtr displayDC;
// IntPtr windowDC;
// Get the window's size.
var windowRect = new WinApi.User32.RECT();
WinApi.User32.GetWindowRect(windowHandle, ref windowRect);
var width = windowRect.right - windowRect.left;
var height = windowRect.bottom - windowRect.top;
// Create and setup the bitmap
displayDC = WinApi.User32.GetWindowDC(windowHandle);
// Setup the bitmap
var bitmapDC = WinApi.Gdi32.CreateCompatibleDC(displayDC);
var bitmap = WinApi.Gdi32.CreateCompatibleBitmap(displayDC, width, height);
var nullBitmap = WinApi.Gdi32.SelectObject(bitmapDC, bitmap);
//windowDC = contentsOnly ? WinApi.User32.GetDC(windowHandle) : WinApi.User32.GetWindowDC(windowHandle);
// Copy data from the windowDC to the bitmapDC
// startx, starty, endx, endy, cropx, cropy
WinApi.User32.PrintWindow(windowHandle, bitmapDC, 0);
//WinApi.Gdi32.BitBlt(bitmapDC, 0, 0, width, height, windowDC, 0, 0, WinApi.Gdi32.SRCCOPY | WinApi.Gdi32.CAPTUREBLT);
// Cleanup windowDC, bitmapDC
//WinApi.User32.ReleaseDC(windowHandle, windowDC);
WinApi.Gdi32.SelectObject(bitmapDC, nullBitmap);
WinApi.Gdi32.DeleteDC(bitmapDC);
// Get a Bitmap object from the bitmap's handle
var img = Bitmap.FromHbitmap(bitmap);
// Delete the bitmap and release the
WinApi.Gdi32.DeleteObject(bitmap);
WinApi.User32.ReleaseDC(windowHandle, displayDC);
using (var ms = new MemoryStream())
{
img.Save(ms, format);
img.Dispose();
return ms.ToArray();
}
}
catch (Exception ex)
{
Globals.DebugConsole.Log("GDI Error: " + ex.Message);
return null;
}
}
