How to Print a DesktopOpenGLSurface

[Martin_Gregory]

I would like to print the contents of an OpenGL surface but I see that the “DrawInto()” function, or an OpenGL equivalent is not supported for that class. Can anyone suggest how I might print, either by accessing the underlying structures or by copying the screen pixels into a printer Graphics object?
This is for a Mac and Windows app. Mac is the priority.

[Michel_Bujardet]

You could use an MBS plugin to grab the picture from the screen. At the moment I don’t remember the name, but @Christian_Schmitz must be able to help.

[Michel_Bujardet]

This will grab a given portion of the screen:
https://www.mbsplugins.eu/component_Screenshot.shtml

[Richard_Herd]

In OSX you have the “screencapture” terminal command, so you could call that from a shell.

Regards - Richard.

[Eugene_Dakin]

Maybe try this?

OpenGL Screen Grab

Some years ago I found this code in the forum. I use it to create a PNG files not from the screen but from the OpnGLSurface control. It has worked without problems so far. [code]Function getPicture(glSurf As OpenGLSurface) As Picture 'Capture OpenGLSurface image and puts it into a PNG file //calculate sizes dim w As integer = glSurf.Width dim h As integer = glSurf.Height dim pad As integer = w mod 4 dim totalBytes As integer = (w * h * 3) + (h * pad) //create and fill memoryblock with p…

[Martin_Gregory]

Thanks Eugene, This is working to create the Picture. I just had to change OpenGLSurface to DesktopOpenGLSurface for my usage.