Can we have a tool like 'xgamma' now?
On Sun, Sep 30, 2012 at 4:10 PM, Kai-Uwe Behrmann <[email protected]> wrote: > In reply to John Kåre Alsaker Fri Sep 28 08:52:17 PDT 2012 > >> - srgb: >> Rendering in linear gamma: >> If the hardware supports sRGB textures: >> EGL: Use sRGB textures and present it as linear >> gamma to shaders. >> If the hardware doesn't support sRGB textures: >> Shader: Convert from sRGB to linear gamma. >> - rgb: >> Rendering in sRGB gamma: >> Shader: Convert from linear to sRGB gamma. > > > "sRGB textures" implies supporting the sRGB colour space on textures. > Is such a texture meant to tell the display system to do final colour > conversion from sRGB to monitor colour space? Are non sRGB colour spaces > still possible like CIE*XYZ or LStar-RGB.icc for "sRGB textures"? > > However you write only about gamma. That is confusing. > sRGB is defined with colour primaries inside the CIE*XYZ space + gamma > encoding, that is what you appear to be referring to, and exact viewing > conditions [1]. Gamma is only one part of the sRGB standard. If you realy > refere to just gamma, then your functions can not be standard compliant and > logical you should avoid sRGB or make clear that you only refere to a subset > of that standard. The term "sRGB texture" would be highly inappropriate for > gamma encoding. > > Gamma, including the sRGB gamma flavor, belongs to a logical layer called > gamma correction [2]. On the opposite, colour management needs proper > knowledge of the used gamma, in order to work properly. > > kind regards > Kai-Uwe Behrmann > -- > developing for colour management www.behrmann.name + www.oyranos.org > > [1] http://en.wikipedia.org/wiki/SRGB > [2] http://en.wikipedia.org/wiki/Gamma_correction > > _______________________________________________ > wayland-devel mailing list > [email protected] > http://lists.freedesktop.org/mailman/listinfo/wayland-devel > _______________________________________________ wayland-devel mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/wayland-devel
