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(for example, 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