Original Post
Hello, a few weeks ago, i found out, that the performance goes down using my own glsl shader while transmission of data to the framebuffer. After all, i found the solution, that i can transmit the data first to the framebuffer using the default shader and then apply my shader while copying the data from one color buffer to the next. Now, i wanted to use the glSeparableFilter2D function, since it seems to be smart for small filters. The problem is, that the framerate is very low, just like the issue i reported before. The workaround i mentioned above do not work, since the separable filter function is applied during transmission. Now, my question is, do somebody use this function successful at a high framerate? If that is the case, what has to be considered to enable the high framerate? Thanks in advance Regards, Stefan