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diff --git a/info/blueshift.texinfo b/info/blueshift.texinfo index cafba90..4cf1ac6 100644 --- a/info/blueshift.texinfo +++ b/info/blueshift.texinfo @@ -326,6 +326,7 @@ Disables or enables Blueshift. * Running without X:: Configuration options for running without X. * Optimising:: Functions that can be used to optimise performance. * Interpolation:: Interpolation functionised curves. +* Temperature constants:: Predefined colour temperature values. @end menu @@ -1597,6 +1598,258 @@ then the first argument will be returned: no interpolation is done. +@node Temperature constants +@section Temperature constants + + +There is a collection of predefined colour +temperatures that are accessable in form +of constants. None of these (except those +from the D series) colour temperatures are +exact or guaranteed to even be approximate +values. A few of them are from Wikipedia, +others are from @emph{very} questionable +sources. Some values are, as indicated by +their name, those used in f.lux. + +Warning: f.lux is nasty software that is +extremely negative in the freedom dimension. +Values are not verified, they are only +acquired from f.lux's ``Frequently asked +questions''. + +The predefined colour temperatures, in +order of warmness, are: + +@c TODO can we use a proper kelvin symbol instead +@c of K, that is, K with all three stroked +@c intersecting (the K [U+212A] symbol)? + +@table @code +@item K_F_LUX_W32_EMBER = 1200 K +The colour temperature in the Windows port of f.lux named `ember'. + +@item K_MATCH_FLAME = 1700 K +Approximate colour temperature of the flame of a match stick. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_CANDLE_FLAME = 1850 K +@itemx K_CANDLELIGHT +Approximate colour temperature of the flame of a candle. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_SUNSET = 1850 K +Approximate colour temperature of the sunset. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_SUNRISE = 1850 K +Approximate colour temperature of the sunrise. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_F_LUX_W32_CANDLE = 1900 K +The colour temperature in the Windows port of f.lux named `candle'. + +@item K_HIGH_PRESSURE_SODIUM = 2100 K +Approximate colour temperature of high pressure sodium + +@item K_F_LUX_MAC_CANDLE = 2300 K +The colour temperature in the Mac OS X and iOS port of f.lux named `candle'. + +@item K_F_LUX_W32_WARM_INCANDESCENT = 2300 K +The colour temperature in the Windows port of f.lux named `warm incandescent'. + +@item K_STANDARD_INCANDESCENT = 2500 K +@itemx K_INCANDESCENT +Approximate colour of standard incandescent. + +@item K_F_LUX_MAC_TUNGSTEN = 2700 K +The colour temperature in the Mac OS X and iOS port of f.lux named `tungsten'. + +@item K_F_LUX_W32_INCANDESCENT = 2700 K +The colour temperature in the Windows port of f.lux named `incandescent'. + +@item K_EXTRA_SOFT = 2700 K +@c @itemx K_PIANO_PIANO_LUX +@c @itemx K_PIANO_PIANO +A very soft colour temperature. + +@item K_INCANDESCENT_LAMP = average of 2700 K and 3300 K +Approximate average colour temperature of incandescent lamps. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_EARLY_SUNRISE = average of 2800 K and 3200 K +Approximate average colour temperature the the sunrise at its early stage. + +@item K_LATE_SUNSET = average of 2800 K and 3200 K +Approximate average colour temperature the the sunsun at its late stage. + +@item K_WARM_WHITE = 3000 K +Approximate colour temperature of ``warm white''. + +@item K_SOFT_WHITE_COMPACT_FLOURESCENT_LAMP = 3000 K +@itemx K_WARM_WHITE_COMPACT_FLOURESCENT_LAMP +Approximate colour temperature of soft/warm white compact flourescent lamps. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_HALOGEN_LIGHT = 3000 K +Approximate colour temperature of halogen light. + +@item K_TUNGSTEN_LIGHT = 3200 K +Approximate colour temperature of tungsten light. +@c (not to be confused with scheelite) + +@item K_HOUSEHOLD_LIGHT_BULB = 3200 K +@itemx K_LIGHT_BULB +Approximate colour temperature regular household light bulbs. + +@item K_STUDIO_LAMP = 3200 K +Approximate colour temperature studio lamps. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_PHOTOFLOOD = 3200 K +Approximate colour temperature photoflood. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_STUDIO_CP_LIGHT = 3350 K +Approximate colour temperature studio `CP' light. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_F_LUX_MAC_HALOGEN = 3400 K +The colour temperature in the Mac OS X and iOS port of f.lux named `halogen'. + +@item K_F_LUX_W32_HALOGEN = 3400 K +The colour temperature in the Windows port of f.lux named `halogen'. + +@item K_SOFT = 3700 K +@c @itemx K_PIANO_LUX +@c @itemx K_PIANO +A soft colour temperature. + +@item K_MOONLIGHT = average of 4100 K and 4150 K +Approximate average colour temperature of moonlight. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_COOL_WHITE = 4200 K +Approximate colour temperature of ``cool white''. + +@item K_F_LUX_MAC_FLOURESCENT = 4200 K +The colour temperature in the Mac OS X and iOS port of f.lux named `flourescent'. + +@item K_F_LUX_W32_FLOURESCENT = 4200 K +The colour temperature in the Windows port of f.lux named `flourescent'. + +@item K_ELECTRONIC_FLASH_BULB = 4500 K +@itemx K_FLASH_BULB +Approximate colour temperature of electronic flash bulbs. + +@item K_D50 = 5000 K +The standard illuminant D50 of the CIE standard illuminant series D. + +@item K_NOON_DAYLIGHT = 5000 K +Approximate colour temperature of noon daylight. + +@item K_DIRECT_SUN = 5000 K +Approximate colour temperature of direct sunlight. + +@item K_METAL_HALIDE = 5000 K +Approximate colour temperature of metal halide. + +@item K_HORIZON_DAYLIGHT = 5000 K +Approximate colour temperature of horizon daylight. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_TUBULAR_FLUORESCENT_LAMP = 5000 K +Approximate colour temperature of tubular fluorescent lamps. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_COOL_WHITE_COMPACT_FLUORESCENT_LAMPS = 5000 K +@itemx K_DAYLIGHT_WHITE_COMPACT_FLUORESCENT_LAMPS +Approximate colour temperature of cool white/daylight compact fluorescent lamps. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_F_LUX_MAC_DAYLIGHT = 5000 K +The colour temperature in the Mac OS X and iOS port of f.lux named `daylight'. + +@item K_D55 = 5500 K +The standard illuminant D55 of the CIE standard illuminant series D. + +@item K_F_LUX_W32_DAYLIGHT = 5500 K +The colour temperature in the Windows port of f.lux named `daylight'. + +@item K_MODERATELY_SOFT = 5500 +@c @itemx K_MEZZO_PIANO_LUX +@c @itemx K_MEZZO_PIANO +A moderately soft colour temperature. + +@c @item K_CRYSTAL_VERTICAL = 5600 K +@c The colour temperature of the standard lighting of +@c "Kristall, vertikal accent i glas och stål" +@c (Crystal, vertical accent in glass and steal) +@c @c http://ljusdesign.com/meriter/juryn.htm + +@item K_CLEAR_MID_DAY = 5600 K +Approximate colour temperature of a clear mid-day. + +@item K_VERTICAL_DAYLIGHT = average of 5500 K and 6000 K +Approximate average colour temperature of vertical daylight. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_ELECTRONIC_FLASH = average of 5500 K and 6000 K +Approximate average colour temperature of electronic flash. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_XENON_SHORT_ARC_LAMP = 6200 K +Approximate colour temperature of Xenon short-arc lamp. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_DAYLIGHT = 6500 K +Approximate colour temperature of daylight. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_OVERCAST_DAY = 6500 K +Approximate colour temperature of daylight during an overcast day. +@c https://en.wikipedia.org/wiki/Colour_temperature + +@item K_D65 = 6500 K +@itemx K_NEUTRAL +@itemx K_WHITE +@c @itemx K_MEZZO_LUX +@c @itemx K_MEZZO +The standard illuminant D65 of the CIE standard illuminant series D, +the standard colour temperature. + +@item K_SHARP = 7000 K +@c @itemx K_FORTE_LUX +@c @itemx K_FORTE +A sharp colour temperature. + +@item K_D75 = 7500 K +The standard illuminant D75 of the CIE standard illuminant series D. + +@item K_BLUE_FILTER = 8000 K +Approximate colour temperature of a standard blue filter. + +@item K_NORTH_LIGHT = 10000 K +@itemx K_BLUE_SKY +Approximate colour temperature of north light. + +@item K_EXTRA_SHARP = 10000 K +@c @itemx K_FORTE_FORTE_LUX +@c @itemx K_FORTE_FORTE +A very sharp colour temperature. + +@item K_SKYLIGHT = average of 9000 K and 15000 K +Approximate average colour temperature of the skylight. + +@item K_OUTDOOR_SHADE = average of 9000 K and 15000 K +Approximate average colour temperature of an outdoor shade. + +@item K_CLEAR_BLUE_POLEWARD_SKY = average of 15000 K and 27000 K +Approximate average colour temperature of a clear blue poleward sky. +@c https://en.wikipedia.org/wiki/Colour_temperature +@end table + + @node Configuration examples @chapter Configuration examples |