diff options
Diffstat (limited to 'extensions/naive-CMYK.c')
| -rw-r--r-- | extensions/naive-CMYK.c | 243 |
1 files changed, 5 insertions, 238 deletions
diff --git a/extensions/naive-CMYK.c b/extensions/naive-CMYK.c index 3b7a70c..a8a874a 100644 --- a/extensions/naive-CMYK.c +++ b/extensions/naive-CMYK.c @@ -1,5 +1,5 @@ /* babl - dynamically extendable universal pixel conversion library. - * Copyright (C) 2005, Øyvind Kolås. + * Copyright (C) 2005, 2018 Øyvind Kolås. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public @@ -14,6 +14,9 @@ * You should have received a copy of the GNU Lesser General * Public License along with this library; if not, see * <https://www.gnu.org/licenses/>. + * + * this is an interim file, to keep babl from complaining about double + * registration of cmyk formats. */ #include "config.h" @@ -23,248 +26,12 @@ #include "babl.h" #include "base/util.h" - -static void rgba_to_cmyk (const Babl *conversion,char *src, - char *dst, - long n); - -static void cmyk_to_rgba (const Babl *conversion,char *src, - char *dst, - long n); - -static void rgba_to_cmy (const Babl *conversion,char *src, - char *dst, - long n); - -static void cmy_to_rgba (const Babl *conversion,char *src, - char *dst, - long n); - int init (void); int init (void) { - babl_component_new ("cyan", NULL); - babl_component_new ("yellow", NULL); - babl_component_new ("magenta", NULL); - babl_component_new ("key", NULL); - - babl_model_new ( - "name", "CMYK", - babl_component ("cyan"), - babl_component ("magenta"), - babl_component ("yellow"), - babl_component ("key"), - NULL - ); - babl_model_new ( - "name", "CMY", - babl_component ("cyan"), - babl_component ("magenta"), - babl_component ("yellow"), - NULL - ); - - babl_conversion_new ( - babl_model ("RGBA"), - babl_model ("CMYK"), - "linear", rgba_to_cmyk, - NULL - ); - babl_conversion_new ( - babl_model ("CMYK"), - babl_model ("RGBA"), - "linear", cmyk_to_rgba, - NULL - ); - babl_conversion_new ( - babl_model ("RGBA"), - babl_model ("CMY"), - "linear", rgba_to_cmy, - NULL - ); - babl_conversion_new ( - babl_model ("CMY"), - babl_model ("RGBA"), - "linear", cmy_to_rgba, - NULL - ); - - babl_format_new ( - "name", "CMYK float", - babl_model ("CMYK"), - babl_type ("float"), - babl_component ("cyan"), - babl_component ("magenta"), - babl_component ("yellow"), - babl_component ("key"), - NULL - ); - babl_format_new ( - "name", "CMY float", - babl_model ("CMY"), - babl_type ("float"), - babl_component ("cyan"), - babl_component ("magenta"), - babl_component ("yellow"), - NULL - ); - - babl_format_new ( - "name", "CMYK u8", - babl_model ("CMYK"), - babl_type ("u8"), - babl_component ("cyan"), - babl_component ("magenta"), - babl_component ("yellow"), - babl_component ("key"), - NULL - ); - + /* do nothing, drop this whole file after a couple of releases */ return 0; } - -static void -rgba_to_cmyk (const Babl *conversion,char *src, - char *dst, - long n) -{ - while (n--) - { - double red = linear_to_gamma_2_2 (((double *) src)[0]); - double green = linear_to_gamma_2_2 (((double *) src)[1]); - double blue = linear_to_gamma_2_2 (((double *) src)[2]); - - double cyan, magenta, yellow, key; - - double pullout = 1.0; - - cyan = 1.0 - red; - magenta = 1.0 - green; - yellow = 1.0 - blue; - - key = 1.0; - if (cyan < key) key = cyan; - if (magenta < key) key = magenta; - if (yellow < key) key = yellow; - - key *= pullout; - - if (key < 1.0) - { - cyan = (cyan - key) / (1.0 - key); - magenta = (magenta - key) / (1.0 - key); - yellow = (yellow - key) / (1.0 - key); - } - else - { - cyan = 0.0; - magenta = 0.0; - yellow = 0.0; - } - - ((double *) dst)[0] = cyan; - ((double *) dst)[1] = magenta; - ((double *) dst)[2] = yellow; - ((double *) dst)[3] = key; - - src += 4 * sizeof (double); - dst += 4 * sizeof (double); - } -} - -static void -cmyk_to_rgba (const Babl *conversion,char *src, - char *dst, - long n) -{ - while (n--) - { - double cyan = ((double *) src)[0]; - double magenta = ((double *) src)[1]; - double yellow = ((double *) src)[2]; - double key = ((double *) src)[3]; - - double red, green, blue; - - if (key < 1.0) - { - cyan = cyan * (1.0 - key) + key; - magenta = magenta * (1.0 - key) + key; - yellow = yellow * (1.0 - key) + key; - } - else - { - cyan = magenta = yellow = 1.0; - } - - red = 1.0 - cyan; - green = 1.0 - magenta; - blue = 1.0 - yellow; - - ((double *) dst)[0] = gamma_2_2_to_linear (red); - ((double *) dst)[1] = gamma_2_2_to_linear (green); - ((double *) dst)[2] = gamma_2_2_to_linear (blue); - - ((double *) dst)[3] = 1.0; - - src += 4 * sizeof (double); - dst += 4 * sizeof (double); - } -} - -static void -rgba_to_cmy (const Babl *conversion,char *src, - char *dst, - long n) -{ - while (n--) - { - double red = linear_to_gamma_2_2 (((double *) src)[0]); - double green = linear_to_gamma_2_2 (((double *) src)[1]); - double blue = linear_to_gamma_2_2 (((double *) src)[2]); - - double cyan, magenta, yellow; - - cyan = 1.0 - red; - magenta = 1.0 - green; - yellow = 1.0 - blue; - - ((double *) dst)[0] = cyan; - ((double *) dst)[1] = magenta; - ((double *) dst)[2] = yellow; - - src += 4 * sizeof (double); - dst += 3 * sizeof (double); - } -} - -static void -cmy_to_rgba (const Babl *conversion,char *src, - char *dst, - long n) -{ - while (n--) - { - double cyan = ((double *) src)[0]; - double magenta = ((double *) src)[1]; - double yellow = ((double *) src)[2]; - - double red, green, blue; - - red = 1.0 - cyan; - green = 1.0 - magenta; - blue = 1.0 - yellow; - - ((double *) dst)[0] = gamma_2_2_to_linear (red); - ((double *) dst)[1] = gamma_2_2_to_linear (green); - ((double *) dst)[2] = gamma_2_2_to_linear (blue); - - ((double *) dst)[3] = 1.0; - - src += 3 * sizeof (double); - dst += 4 * sizeof (double); - } -} |