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Diffstat (limited to '')
| -rw-r--r-- | doc/info/chap/clut-manipulation.texinfo | 236 | ||||
| -rw-r--r-- | src/libclut.h | 4 |
2 files changed, 238 insertions, 2 deletions
diff --git a/doc/info/chap/clut-manipulation.texinfo b/doc/info/chap/clut-manipulation.texinfo index 3a10939..dd08715 100644 --- a/doc/info/chap/clut-manipulation.texinfo +++ b/doc/info/chap/clut-manipulation.texinfo @@ -29,3 +29,239 @@ Additionally, these macros do not allow that arguments have side-effects. None, if the macros have a return value. +@table @code +@item libclut_rgb_contrast(clut, max, type, r, g, b) +Apply contrast correction on the colour curves using sRGB. + +In this context, contrast is a measure of difference between +the whitepoint and blackpoint, if the difference is 0 than +they are both grey. + +Parameters: +@table @code +@item r +The contrast parameter for the red curve. +@item g +The contrast parameter for the green curve. +@item b +The contrast parameter for the blue curve. +@end table + + +@item libclut_cie_contrast(clut, max, type, r, g, b) +Apply contrast correction on the colour curves using CIE xyY. + +In this context, contrast is a measure of difference between +the whitepoint and blackpoint, if the difference is 0 than +they are both grey. + +Parameters: +@table @code +@item r +The contrast parameter for the red curve. +@item g +The contrast parameter for the green curve. +@item b +The contrast parameter for the blue curve. +@end table + + +@item libclut_rgb_brightness(clut, max, type, r, g, b) +Apply brightness correction on the colour curves using sRGB. + +In this context, brightness is a measure of the whiteness +of the whitepoint. + +Parameters: +@table @code +@item r +The brightness parameter for the red curve. +@item g +The brightness parameter for the green curve. +@item b +The brightness parameter for the blue curve. +@end table + + +@item libclut_cie_brightness(clut, max, type, r, g, b) +Apply brightness correction on the colour curves using CIE xyY. + +In this context, brightness is a measure of the whiteness +of the whitepoint. + +Parameters: +@table @code +@item r +The brightness parameter for the red curve. +@item g +The brightness parameter for the green curve. +@item b +The brightness parameter for the blue curve. +@end table + + +@item libclut_linearise(clut, max, type, r, g, b) +Convert the curves from formatted in standard RGB to linear RGB. + +Parameters: +@table @code +@item r +Whether to convert the red colour curve. +@item g +Whether to convert the green colour curve. +@item b +Whether to convert the blue colour curve. +@end table + + +@item libclut_standardise(clut, max, type, r, g, b) +Convert the curves from formatted in linear RGB to standard RGB. + +Parameters: +@table @code +@item r +Whether to convert the red colour curve. +@item g +Whether to convert the green colour curve. +@item b +Whether to convert the blue colour curve. +@end table + + +@item libclut_gamma(clut, max, type, r, g, b) +Apply gamma correction on the colour curves. + +Parameters: +@table @code +@item r +The gamma parameter for the red curve. +@item g +The gamma parameter for the green curve. +@item b +The gamma parameter for the blue curve. +@end table + + +@item libclut_negative(clut, max, type, r, g, b) +Reverse the colour curves (negative image with gamma preservation.) + +Parameters: +@table @code +@item r +Whether to reverse the red colour curve. +@item g +Whether to reverse the green colour curve. +@item b +Whether to reverse the blue colour curve. +@end table + + +@item libclut_rgb_invert(clut, max, type, r, g, b) +Invert the colour curves (negative image with gamma +invertion), using sRGB. + +Parameters: +@table @code +@item r +Whether to invert the red colour curve. +@item g +Whether to invert the green colour curve. +@item b +Whether to invert the blue colour curve. +@end table + + +@item libclut_cie_invert(clut, max, type, r, g, b) +Invert the colour curves (negative image with gamma +invertion), using CIE xyY. + +Parameters: +@table @code +@item r +Whether to invert the red colour curve. +@item g +Whether to invert the green colour curve. +@item b +Whether to invert the blue colour curve. +@end table + + +@item libclut_sigmoid(clut, max, type, rp, gp, bp) +Apply S-curve correction on the colour curves. +This is intended for fine tuning LCD monitors, +4.5 is good value start start testing at. +You would probably like to use @code{rgb_limits} +before this to adjust the blackpoint as that is +the only way to adjust the blackpoint on many LCD +monitors. + +Parameters: +@table @code +@item rp +Pointer to the sigmoid parameter for the red curve. +@code{NULL} for no adjustment. +@item gp +Pointer to the sigmoid parameter for the green curve. +@code{NULL} for no adjustment. +@item bp +Pointer to the sigmoid parameter for the blue curve. +@code{NULL} for no adjustment. +@end table + + +@item libclut_rgb_limits(clut, max, type, rmin, rmax, gmin, gmax, bmin, bmax) +Changes the blackpoint and the whitepoint, using sRGB. + +Parameters: +@table @code +@item rmin +The red component value of the blackpoint. +That is, the brightness on the red channel. +@item rmax +The red component value of the whitepoint. +That is, the contrast on the red channel. +@item gmin +The green component value of the blackpoint. +That is, the brightness on the green channel. +@item gmax +The green component value of the whitepoint. +That is, the contrast on the green channel. +@item bmin +The blue component value of the blackpoint. +That is, the brightness on the blue channel. +@item bmax +The blue component value of the whitepoint. +That is, the contrast on the blue channel. +@end table + + +@item libclut_cie_limits(clut, max, type, rmin, rmax, gmin, gmax, bmin, bmax) +Changes the blackpoint and the whitepoint, using CIE xyY. + +Parameters: +@table @code +@item rmin +The red component value of the blackpoint. +That is, the brightness on the red channel. +@item rmax +The red component value of the whitepoint. +That is, the contrast on the red channel. +@item gmin +The green component value of the blackpoint. +That is, the brightness on the green channel. +@item gmax +The green component value of the whitepoint. +That is, the contrast on the green channel. +@item bmin +The blue component value of the blackpoint. +That is, the brightness on the blue channel. +@item bmax +The blue component value of the whitepoint. +That is, the contrast on the blue channel. +@end table + + +@end table + +@c TODO Which macros require -lclut? + diff --git a/src/libclut.h b/src/libclut.h index f994833..0601dd0 100644 --- a/src/libclut.h +++ b/src/libclut.h @@ -305,8 +305,8 @@ * This is intended for fine tuning LCD monitors, * 4.5 is good value start start testing at. * You would probably like to use rgb_limits before - * this to adjust the black point as that is the - * only why to adjust the black point on many LCD + * this to adjust the blackpoint as that is the + * only way to adjust the blackpoint on many LCD * monitors. * * None of the parameter may have side-effects. |