Taking screenshots of emulator instead of copying from screen

[hijazi]

In /Bot/CaptureScreen.cs you use

Bitmap bmp = new Bitmap(size.Width, size.Height, PixelFormat.Format32bppArgb);
Graphics.FromImage(bmp).CopyFromScreen(rect.left + x, rect.top + y, 0, 0, size, CopyPixelOperation.SourceCopy);

To capture the screen, but as I noticed this requires MEmu to be on the screen to be captured, and not in background so I used the capture screen in adb and graphics to crop the image, and now it can be run in the bacground, I'm planning to make this a pull request but thought to add the code here as a start.
in the same class I commented your code and added the following beneath it:

RawImage rawImage = device.Screenshot;
Bitmap bmp = (Bitmap) rawImage.ToImage(PixelFormat.Format32bppArgb);
var imageHight = bmp.Height;
var imageWidth = bmp.Width;
// crop the image
Rectangle cropRect = new Rectangle(x, y, size.Width, size.Height);
Bitmap src = bmp;
Bitmap target = new Bitmap(size.Width, size.Height);

using (Graphics g = Graphics.FromImage(target))
{
    g.DrawImage(src, 0, 0,
               cropRect,
               GraphicsUnit.Pixel);
}
// end crop
return target;

maybe the crop won't work on your screen because I'm still working on figuring out the dimensions.
best regards!

[julianperrott]

I found the ADB screenshots to be slow, but it depends if you need performance.

https://github.com/julianperrott/MemuScreenCaptureExample

[PoH98]

I know that this repos might been long time no update, but here is what mine's research. Adb screencap will be slower if using any pulls or png converts after capture. However if using MEmu's shared path and screenshot the image into the share path, with only .raw format (which will becomes BGR bitmap), read the raw directly will get almost 20 fps !

[julianperrott]

Ok, interesting to know :)