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| author | Mattias Andrée <maandree@member.fsf.org> | 2016-01-07 17:27:50 +0100 |
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| committer | Mattias Andrée <maandree@member.fsf.org> | 2016-01-07 17:27:50 +0100 |
| commit | c58de6faa5c3d99807a4d23a2fdc2de7510f5e8f (patch) | |
| tree | 11a7168926e02593923b213f55884273cbe28b58 /src/libclut.h | |
| parent | m (diff) | |
| download | libclut-c58de6faa5c3d99807a4d23a2fdc2de7510f5e8f.tar.gz libclut-c58de6faa5c3d99807a4d23a2fdc2de7510f5e8f.tar.bz2 libclut-c58de6faa5c3d99807a4d23a2fdc2de7510f5e8f.tar.xz | |
libclut_linearise + libclut_standardise
Signed-off-by: Mattias Andrée <maandree@member.fsf.org>
Diffstat (limited to 'src/libclut.h')
| -rw-r--r-- | src/libclut.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/libclut.h b/src/libclut.h index 891c7c4..32b099a 100644 --- a/src/libclut.h +++ b/src/libclut.h @@ -252,6 +252,64 @@ while (0) +/** + * Convert the curves from formatted in standard RGB to linear RGB. + * + * None of the parameter may have side-effects. + * + * @param ramp Pointer to the gamma ramps, must have the arrays + * `red`, `green`, and `blue`, and the scalars + * `red_size`, `green_size`, and `blue_size`. Ramp + * structures from libgamma can be used. + * @param max The maximum value on each stop in the ramps. + * @param type The data type used for each stop in the ramps. + * @param r Whether to convert the red colour curve. + * @param g Whether to convert the green colour curve. + * @param b Whether to convert the blue colour curve. + */ +#define libclut_linearise(ramp, max, type, r, g, b) \ + do \ + { \ + double m__ = (double)(max); \ + if (r) \ + libclut__(ramp, red, type, m__ * libclut_model_standard_to_linear1(LIBCLUT_VALUE / m__)); \ + if (g) \ + libclut__(ramp, green, type, m__ * libclut_model_standard_to_linear1(LIBCLUT_VALUE / m__)); \ + if (b) \ + libclut__(ramp, blue, type, m__ * libclut_model_standard_to_linear1(LIBCLUT_VALUE / m__)); \ + } \ + while (0) + + +/** + * Convert the curves from formatted in linear RGB to standard RGB. + * + * None of the parameter may have side-effects. + * + * @param ramp Pointer to the gamma ramps, must have the arrays + * `red`, `green`, and `blue`, and the scalars + * `red_size`, `green_size`, and `blue_size`. Ramp + * structures from libgamma can be used. + * @param max The maximum value on each stop in the ramps. + * @param type The data type used for each stop in the ramps. + * @param r Whether to convert the red colour curve. + * @param g Whether to convert the green colour curve. + * @param b Whether to convert the blue colour curve. + */ +#define libclut_standardise(ramp, max, type, r, g, b) \ + do \ + { \ + double m__ = (double)(max); \ + if (r) \ + libclut__(ramp, red, type, m__ * libclut_model_linear_to_standard1(LIBCLUT_VALUE / m__)); \ + if (g) \ + libclut__(ramp, green, type, m__ * libclut_model_linear_to_standard1(LIBCLUT_VALUE / m__)); \ + if (b) \ + libclut__(ramp, blue, type, m__ * libclut_model_linear_to_standard1(LIBCLUT_VALUE / m__)); \ + } \ + while (0) + + #endif |