将屏幕截图 (Bitblt) 存储在内存缓冲区中以通过 IdTCPClient 发送
在 Windows Vista 上的 C++ builder 6 中...
Graphics:: TBitmap * bmpscreencapture = new Graphics::TBitmap;
bmpscreencapture-> Height = Screen-> Height;
bmpscreencapture-> Width = Screen-> Width;
HDC ScreenSrc = GetWindowDC (0);
BitBlt (bmpscreencapture-> Canvas-> Handle, 0, 0, Screen-> Width,
Screen-> Height, ScreenSrc, 0, 0, SRCCOPY);
Canvas->Draw(10, 10, bmpscreencapture);
ReleaseDC (GetDesktopWindow (), ScreenSrc);
delete bmpscreencapture;
我目前有一段代码用于捕获屏幕并将屏幕捕获显示到空表单上。 我想做的是将捕获的图像存储到内存缓冲区中，然后使用 indy 客户端 IdTCPClient 通过互联网发送该缓冲区，以便使用 indy 服务器 IDTCPServer 的类似程序接收。
有没有人对如何实现这一目标有任何建议/想法？ 我对图形编程相当陌生
In c++ builder 6 on windows vista ...
Graphics:: TBitmap * bmpscreencapture = new Graphics::TBitmap;
bmpscreencapture-> Height = Screen-> Height;
bmpscreencapture-> Width = Screen-> Width;
HDC ScreenSrc = GetWindowDC (0);
BitBlt (bmpscreencapture-> Canvas-> Handle, 0, 0, Screen-> Width,
Screen-> Height, ScreenSrc, 0, 0, SRCCOPY);
Canvas->Draw(10, 10, bmpscreencapture);
ReleaseDC (GetDesktopWindow (), ScreenSrc);
delete bmpscreencapture;
I currently have a section of code for capturing the screen and displaying the screen capture onto an empty form. What I would like to do is store the captured image into a memory buffer and then send this buffer over the internet using the indy client IdTCPClient to be received by a similar program using indy server IDTCPServer.
Has anyone got any suggestions/ideas of how to accomplish this?? I am fairly new to graphics programming
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使用 TBitmap::SaveToStream() 方法将数据保存到 TStream，例如 TMemoryStream。 然后将 TStream 传递给 Indy 的 TIdTCPConnection::WriteStream() （Indy 9 及更早版本）或 TIdIOHandler::Write(TStream) (Indy 10) 方法。 在接收端，您可以使用 TIdTCPConnection/TIdIOHandler::ReadStream() 方法将数据读入 TStream，然后将 TStream 传递给 TBitmap::LoadFromStream() 方法。
Use the TBitmap::SaveToStream() method to save the data to a TStream, such as a TMemoryStream. Then pass the TStream to Indy's TIdTCPConnection::WriteStream() (Indy 9 and earlier) or TIdIOHandler::Write(TStream) (Indy 10) method. On the recieving end, you can then use the TIdTCPConnection/TIdIOHandler::ReadStream() method to read the data into a TStream, and then pass the TStream to the TBitmap::LoadFromStream() method.