Custom drawing behind GUI not possible due to Impl_Frame_3D_ClearColor() about hello_imgui

[pthom]

Hello,

Thanks for contacting me! I'd be very happy to accept a PR!

I'm not sure that ShowGui is the ideal place where to place such code, since the background drawing in not really related to the GUI.

After a quick look, I though it would perhaps be better to add custom callback inside src/hello_imgui/runner_callbacks.h near existing ones:

For example:

    VoidFunction PreNewFrame = EmptyVoidFunction();
    VoidFunction BeforeImGuiRender = EmptyVoidFunction();
    VoidFunction AfterSwap = EmptyVoidFunction();

   // add this?
  VoidFunction CustomBackground = EmptyVoidFunction();

Note:

• the new callback should be documented at the top of the file, near the other
• it might be a good idea to add a note that refers to this callback next to the doc for backgroundColorinside src/hello_imgui/imgui_window_params.h

What do you think?

PS:

I like your hdrview project! It made me think of another project I wrote ImmVision, (part of "ImGui Bundle") although it does not handle hdr (it is more of an image processing debugger).

[wkjarosz]

Yes, that does sound like a better way to fit it in. I'll give it a try and let you know.