I am working on an application where graphics symbols like circles and rectangles have to be overlayed over a texture. Sometimes depending on the color of the texture, these graphic symbols are not clearly visible.
We have come up with a scheme to draw black border of 1 pixel width around these symbols(inside and outside of rectangle) to make it stand out, depending on the texture background. How would this black bordering be implemented in OpenGL?
Thanks,
R Gopal