framebuffer

Documentation

Overview

Render-to-texture via an offscreen framebuffer object (FBO).

Demonstrates:

• Creating a texture to serve as a color attachment
• Creating an FBO and attaching the texture with FramebufferTexture2D
• Checking framebuffer completeness with CheckFramebufferStatus
• Rendering a triangle into the FBO (offscreen)
• Reading back pixels from the FBO with ReadPixels
• Binding the FBO texture and sampling it in a second pass

The program performs two render passes:

1. Render a green triangle into a 32x32 FBO texture.
2. Bind that texture and draw a fullscreen quad onto the default framebuffer (64x64 pbuffer), effectively displaying the FBO contents.

Both passes are verified by reading back pixels.