Heres the relevant code snippets ...

void C3DRender::RenderToBitmap(void *bits)
{
// without FBO
// render to the backbuffer and copy the backbuffer to a texture

// clear buffer...

It just comes out gray. I can post the source code tomorrow. Sorry about the cross post.

Hi all -

What I need to do is make a thumbnail of an opengl window image for when the window is not the foregroud window. I have it being rendered to the back buffer because if I do a SwapBuffers...

Hi all -

What I need to do is make a thumbnail of an opengl window image for when the window is not the foregroud window. I have it being rendered to the back buffer because if I do a SwapBuffers...

I am new to open gl, and have been putting together a viewer for a bunch of 2d objects (points, lines, circles, and arcs) that represent a part. I have my viewer working, and it allows me to zoom in...