Converting colors set at runtime to sRGB

Scripting Issues
1

Hi, hope you’re all doing well.

I have recently converted my textures and vertex coloring to sRGB through external scripts. However, I have a lot of manual setColor, setColorScale, etc. calls that are done at runtime.

How would I go about switching these over to the new color space?..there’s quite a lot which is why I’m looking for an automatic way to do this–does such a way exist? If not, what would be the best steps forward?

Thanks all!

2

If done correctly, this is not required since assets are created using linear space.

sRGB is displayed either on the monitor or through a post-processing effect.

In other words, you don’t need to physically convert textures, since there will be double the brightness if the user’s monitor already displays sRGB mode.

1 Like
3

I had a feeling I was completely misunderstanding haha. I’ll research more into all of this, thanks!

4

Here is a good material to study on this concept.

In Panda3D, this is the case it can be done in hardware, in the prc file.
framebuffer-srgb

2 Likes
5

To convert an sRGB color in range 0-255 to linear floating-point, you can use this function:

from panda3d.core import decode_sRGB_float

# html color #123456
color = (
    decode_sRGB_float(0x12),
    decode_sRGB_float(0x34),
    decode_sRGB_float(0x56),
)

If you already have them in floating point 0.0-1.0 range, you can also pass those directly to the same function; it behaves differently depending on whether you pass it an integer or floating-point number.