excaliburjs / Excalibur / 5372822924

89%

push

github

feat: [#2416] Add Postprocessor hooks and default some uniforms (#2667)

Closes #2416 

This PR adds some new default uniforms supplied to postprocessors automatically if they are present in the source
* `uniform float u_time_ms` - total playback time in milliseconds
* `uniform float u_elapsed_ms` - the elapsed time from the last frame in milliseconds
* `uniform vec2 u_resolution` - the resolution of the canvas (in pixels)

Custom uniforms can now be set in an optional `onUpdate()` function on postprocessors, the internal `shader.use()` is called for users.


Example using the CRT post processor, see gist https://gist.github.com/eonarheim/5ebb7f9161c10894935479e0caa0f6c7

<img width="677" alt="image" src="https://github.com/excaliburjs/Excalibur/assets/612071/07521591-934b-4aec-b77b-a01c8488025b">

4370 of 5500 branches covered (79.45%)

10269 of 11195 relevant lines covered (91.73%)

26492.35 hits per line