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Diffstat (limited to '')
| -rw-r--r-- | libglitter.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/libglitter.h b/libglitter.h index 0fc5888..4cd64bf 100644 --- a/libglitter.h +++ b/libglitter.h @@ -7,6 +7,14 @@ /** + * The CIE xyY values of the D65 illuminant + */ +#define LIBGLITTER_ILLUMINANT_D65\ + 0.312726871026564878786047074755,\ + 0.329023206641284038376227272238, 1.0\ + + +/** * Rendering context for an input raster's specifications * * Render context's are thread-safe, however updating them are not @@ -183,4 +191,38 @@ void libglitter_desaturate_double(double **, size_t, size_t, size_t, size_t, siz void libglitter_desaturate_float(float **, size_t, size_t, size_t, size_t, size_t, float, const float *); +/** + * Get the matrix each pixel shall be multiplied with + * to convert it from the output's colour space to sRGB + * + * This is useful when the output does not use sRGB, + * but the application does + * + * @param matrix Output buffer for the conversion matrix + * @param c1x The CIE x value (as in CIE xyY) of the output's first primary colour + * @param c1y The CIE y value (as in CIE xyY) of the output's first primary colour + * @param c2x The CIE x value (as in CIE xyY) of the output's second primary colour + * @param c2y The CIE y value (as in CIE xyY) of the output's second primary colour + * @param c3x The CIE x value (as in CIE xyY) of the output's third primary colour + * @param c3y The CIE y value (as in CIE xyY) of the output's third primary colour + * @param white_x The CIE x value (as in CIE xyY) of the output's white point + * @param white_y The CIE y value (as in CIE xyY) of the output's white point + * @param white_Y The CIE Y value (as in CIE xyY) of the output's white point + * + * `LIBGLITTER_ILLUMINANT_D65` can be input in place of + * `white_x, white_y, white_Y` (it expands to three arguments) + * if the output's whitepoint is the D65 illuminant + */ +void libglitter_get_colour_space_conversion_matrix_double(double[3][3], double, double, double, double, + double, double, double, double, double); + +/** + * This value is identical to `libglitter_get_colour_space_conversion_matrix_double`, + * apart from it parameter types, see `libglitter_get_colour_space_conversion_matrix_double` + * for details about this function + */ +void libglitter_get_colour_space_conversion_matrix_float(float[3][3], float, float, float, float, + float, float, float, float, float); + + #endif |