The NVIDIA GPU Filtering Framework provides a mechanism for developers wth the Adobe Photoshop™ SDK (available from Adobe) to quickly and easily assemble a custom, OpenGL shader-based Adobe Photoshop filter plug-in. The framework performs all relevant communication with Photoshop, as well as all the resource management necessary to support the large images that Photoshop supports. Custom Filter Requirements To create a custom filter using the framework, simply override the GPUFilterData class, implement all of its virtual functions, and set all of its member variables. Many filters are applied over more than one pass, where the results from one pass are fed into the next. Separable filter kernels can be optimized in this manner, by applying a horizontal filter kernel on the first pass, and a vertical filter kernel on the next. The framework allows you to apply as many passes as you want. Each pass can use its own shader, with its own set of parameters.