Using GPUImageRGBFilter

Question

I've trying to use the GPUImageRGBFilter but without success. I want to change each channel value, for instance:

Red: 0.2
Green: 0.4
Blue: 0.3

How can I do this? Can anyone tell me how to use GPUImageRGBFilter?

Answer 1

Assuming what you want to do is multiply the values of each color channel by the values in your post, the solution should be pretty simple;

GPUImageRGBFilter *rgbFilter = [[GPUImageRGBFilter alloc] init];
[rgbFilter setRed:.2];
[rgbFilter setGreen:.4];
[rgbFilter setBlue:.3];

Then use addTarget: and processImage as the documentation instructs.