I want to do soft edge-blending (of 2 projected images from 2 graphic cards, lets say Quadro 3000G) with OpenGL on a 3D engine (60Hz).
(Explanation on edge-blending: here ).
So I want to do blending and intensity (gamma) correction on the output frame. Do you have any idea of the best way to do it with OpenGL (I need performance, then minimize pixel-fill !)?
- GLSL (fragment prog) ?
- any extension to access the pixel ?
- any Opengl instruction (stencil) ?
- draw to texture then filter ?
Any examples ?