How to convert gdImagePtr to base64 string

Question

I am working on streamdeck plugin. Streamdeck supports showing custom images is base64 format. I would like to generate an image using libgd and send the base64 string to streamdeck.

Answer 1

You would need to first render to a framebuffer (virtual screen), then capture the texture from that (because no direct reads on a framebuffer), then convert that captured texture to a pixmap, then get the pixels to a bytebuffer, then convert to base64.

Framebuffer https://libgdx.com/wiki/graphics/opengl-utils/frame-buffer-objects

Framebuffer conversion libgdx TextureRegion to Pixmap