Custom PPSSPP shaders

[LunaMoo]

(03-22-2018 09:59 AM)jdgleaver Wrote:  (...)
but it has a hard-coded 'scanline size' parameter
(...)

I would say there's nothing hardcoded in any post process shader loaded externally from text file;p, but also "scanline size" is actually a define right under the option to activate the effect, left there specially to be messed with.;p

(03-22-2018 09:59 AM)jdgleaver Wrote:  (...)
- REQUIRES a rendering resolution of 1xPSP
(...)

Hint: as long as it doesn't depend on linear screen scaling filter(which overall makes image blurry when stretched from x1 to higher display/window res) you can simply add "upscaling" flag to shader ini file as it forces x1 render res and nearest screen scaling filter ~ it's required for upscaling filters, but can be used freely for any effects which have similar requirement. This will avoid manual switching of resolution and bothering people to remember about doing so.


~

Quick copy-paste reminder of flags we have:

Code:

RequiresIntSupport=True - when unsure, you most likely don't need it
Upscaling=True - forces x1 render res and nearest screen scaling filter which upscaling filters require
OutputResolution=True - outputs to display res, almost always good thing to have
60fps=True - for animated filters
SSAA=value - forces rendering res to value * display res, combined with blurry filters it's nice, but expensive form of AA.

(edit: added new SSAA flag and some descriptions)

We also have some special uniforms like

Code:

u_time
u_video
u_texelDelta
u_pixelDelta

which combined with flags above can make some otherwise impossible things easy, all are used in at least one default effect to see example usage. For example u_time can be used for animations and 60fps flag makes it constant even when game native fps drops down(loading screens for example can often drop to 0 fps which would pause the animation).