Enable building color correction code if you really need it.
The effect of color correction is less noticeable on HUB75 than on ws2812b, however it can reduce your framerate by up to 10%.
For maintainers of custom effects: replace "return mode_solid()" with "return mode_oops()"
Effect errors fall back to Akemi (2D) or Rainbow(1D) instead of SOLID ORANGE.
* a few new error constants
* WLED_O2_ATTR - ask the compiler for stronger optimization of a single function
* WLED_O3_ATTR (WLEDMM) optimize even more
during testing at low brightness I noticed that gradients can be "jumping" in colors quite wildly, turning a smooth gradient into a flickering mess. This is due to the color hue preservation being inaccurate and a bit too aggressive. This can be seen for example using a gradient palette and "Running" FX.
Removing the hue preservation completely fixes it but leaves color artefacts for example visible in PS Fire at very low brightness: the bright part of the flames gets a pink hue. This change is a compromise to fix both problems to a "good enough" state
accroding to the docs of setBufferSize() and svbuf():
> setBufferSize() has to be called right after opening file before any other operation!
so changing buffer sizes on an already opened and partially read file can cause file corruption as the internal buffer is exchanged "mid-flight".
Fix: move all f.setBufferSize() so they appear directly after f.open().
previously gPC cached busses were disabled in slowMode (one pixel mapped to several outputs). However this should not be needed, because the first copy found should be like all other.
* optimize loops that scan through all busses
* small speedups for Bus::autoWhiteCalc()
* small speedups for ColorOrderMap::getPixelColorOrder()
thanks to github Copilot for giving me the right ideas for this optimization
* bug: logf(temp-10) result becomes NaN when kelvin < 1200
* bug (RISC-V only): parameter of Bus::setCCT must be signed, to avoid undefined behaviour
* minor optimization by replacing constrain() with min(max())
- fixed inconsitencies in size rendering
- fixed palette being wrapped in color by position and color by age modes
- Fixed bug in memory layout: for some unknown reason, if flags come before particles, last flag is sometimes overwritten, changing memory laout seems to fix that
- New color modes in PS Fireworks 1D:
- custom3 slider < 16: lower saturation (check1: single color or multi-color explosions)
- custom3 slider <= 23: full saturation (check1: single color or multi-color explosions)
- custom3 slider > 23: color by speed (check 1 has not effect here)
- custom slider = max: color by age or color by position (depends on check1)
- removed local buffer for ESP8266 in 1D system to save on RAM
- increased particle brightness in PS Impact
- minor tweak in collision binning (might improve speed)
- removed comments and some other unused stuff
- fixed a few compiler wranings
