GLImageProcessing Multiple Filters?

I have read through this question here: Can example "GLImageProcessing" work with multi filters However, I still do not understand how to edit the sample code for GLImageProcessing to support multiple filters. Here is the code that I am doing now in drawGL of Imaging.c Any help? void drawGL(int wide, int high, float val, int mode) { GLuint ResultFBO; GLuint ResultTexture; static int prevmode = -1;

[izit_kosuke]

GLImageProcessingのマルチフィルタ版