Difference between revisions of "LlLinear2sRGB"
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|spec=Lights in Second Life are specified in LSL as linear red, green blue values in the range (0.0, 1.0). Internally light calculations are performed in the sRGB colorspace. | |spec=Lights in Second Life are specified in LSL as linear red, green blue values in the range (0.0, 1.0). Internally light calculations are performed in the sRGB colorspace. | ||
The sRGB (Standard Red Green Blue) colorspace is defined in IEC 61966-2-1:1999 and was developed as a joint project between Microsoft and HP. | The sRGB (Standard Red Green Blue) colorspace is defined in [https://www.color.org/srgb04.xalter IEC 61966-2-1:1999] and was developed as a joint project between Microsoft and HP. | ||
This calculation is known as an Inverse Electro-Optical Transfer Function (IEOTF). | |||
|caveats= | |||
*The name of this function is actually a misnomer as LSL color is actually in [https://www.color.org/chardata/rgb/BT709.xalter Rec.709] space, not [https://www.color.org/chardata/rgb/srgb.xalter sRGB] space. While they are very similar, the gamma value for sRGB is approx. 2.2, whereas the gamma value for Rec.709 is approx. 2.4. | |||
*Scripting for PBR-enabled viewers: If you enter color vectors manually, using the viewer's color picker, enter them as Linear RGB values. The color picker automatically converts them internally to sRGB, so someone using a PBR-enabled viewer will see them correctly. This means that if you are defining colors with a script, the same is true. You do not need to use llLinear2sRBG to convert your color vectors and apply them separately for PBR. | |||
|examples | |examples | ||
|helpers | |helpers | ||
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|also | |also | ||
|also_functions= | |also_functions= | ||
{{LSL DefineRow||[[llsRGB2Linear]]}} To convert from sRGB to the Linear colorspace. | {{LSL DefineRow||[[llsRGB2Linear]]}} To convert from sRGB to the Linear colorspace. (EOTF) | ||
}} | }} | ||
Latest revision as of 12:07, 12 December 2024
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Summary
Function: vector llLinear2sRGB( vector color );Returns a vector Transforms a color specified in linear RGB colorspace into the sRGB colorspace.
| • vector | color | – | Color in the linear color space. |
Specification
Lights in Second Life are specified in LSL as linear red, green blue values in the range (0.0, 1.0). Internally light calculations are performed in the sRGB colorspace.
The sRGB (Standard Red Green Blue) colorspace is defined in IEC 61966-2-1:1999 and was developed as a joint project between Microsoft and HP.
This calculation is known as an Inverse Electro-Optical Transfer Function (IEOTF).
Caveats
- The name of this function is actually a misnomer as LSL color is actually in Rec.709 space, not sRGB space. While they are very similar, the gamma value for sRGB is approx. 2.2, whereas the gamma value for Rec.709 is approx. 2.4.
- Scripting for PBR-enabled viewers: If you enter color vectors manually, using the viewer's color picker, enter them as Linear RGB values. The color picker automatically converts them internally to sRGB, so someone using a PBR-enabled viewer will see them correctly. This means that if you are defining colors with a script, the same is true. You do not need to use llLinear2sRBG to convert your color vectors and apply them separately for PBR.
Examples
See Also
Functions
| • | llsRGB2Linear | To convert from sRGB to the Linear colorspace. (EOTF) |
Deep Notes
Signature |
|---|
function vector llLinear2sRGB( vector color ); |