/usr/include/babl-0.1/babl/babl.h is in libbabl-dev 0.1.44-1.
This file is owned by root:root, with mode 0o644.
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* Copyright (C) 2005-2008, Øyvind Kolås.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see
* <http://www.gnu.org/licenses/>.
*/
#ifndef _BABL_H
#define _BABL_H
#ifdef __cplusplus
extern "C" {
#endif
#define BABL_INSIDE_BABL_H
#include <babl/babl-macros.h>
#include <babl/babl-types.h>
#include <babl/babl-version.h>
#undef BABL_INSIDE_BABL_H
/**
* babl_init:
*
* Initializes the babl library.
*/
void babl_init (void);
/**
* babl_exit:
*
* Deinitializes the babl library and frees any resources used when
* matched with the number of calls to babl_init().
*/
void babl_exit (void);
/**
* babl_type:
*
* Returns the babl object representing the data type given by @name
* such as for example "u8", "u16" or "float".
*/
const Babl * babl_type (const char *name);
/**
* babl_sampling:
*
* Returns the babl object representing the @horizontal and @vertical
* sampling such as for example 2, 2 for the chroma components in
* YCbCr.
*/
const Babl * babl_sampling (int horizontal,
int vertical);
/**
* babl_component:
*
* Returns the babl object representing the color component given by
* @name such as for example "R", "cyan" or "CIE L".
*/
const Babl * babl_component (const char *name);
/**
* babl_model:
*
* Returns the babl object representing the color model given by @name
* such as for example "RGB", "CMYK" or "CIE Lab".
*/
const Babl * babl_model (const char *name);
/**
* babl_space:
*
* Returns the babl object representing the specific RGB matrix color
* working space referred to by name. Babl knows of:
* sRGB, Rec2020, Adobish, Apple and ProPhoto
*
*/
const Babl * babl_space (const char *name);
typedef enum {
BABL_ICC_INTENT_PERCEPTUAL = 0,
BABL_ICC_INTENT_RELATIVE_COLORIMETRIC = 1,
BABL_ICC_INTENT_SATURATION = 2,
BABL_ICC_INTENT_ABSOLUTE_COLORIMETRIC = 3
} BablIccIntent;
/**
* babl_icc_make_space:
*
* @icc_data: pointer to icc profile in memory
* @icc_length: length of icc profile in bytes
* @intent: the intent from the ICC profile to use.
*
" @error: pointer to a string where decoding errors can be stored,
* if an error occurs, NULL is returned and an error message
* is provided in error.
*
* Create a babl space from an in memory ICC profile, the profile does no
* longer need to be loaded for the space to work, multiple calls with the same
* icc profile and same intent will result in the same babl space.
*
* On a profile that doesn't contain A2B0 and B2A0 CLUTs perceptual and
* relative-colorimetric intents are treated the same.
*
* If a BablSpace cannot be created from the profile NULL is returned and a
* static string is set on the const char *value pointed at with &value
* containing a message describing why the provided data does not yield a babl
* space.
*/
const Babl *babl_icc_make_space (const char *icc_data,
int icc_length,
BablIccIntent intent,
const char **error);
/* babl_icc_get_key:
*
* @icc_data: pointer to in-memory icc profile
* @icc_length: length of icc profile in bytes
* @key: the key we want to quey, see below for some supported values
* @language: 2 char code for language to extract or NULL
* @country: 2 char country code or NULL
*
* Returns NULL if key not found or a malloc allocated utf8 string of the key
* when found, free with free() when done. Supported keys: "description",
* "copyright", "manufacturer", "device", "profile-class", "color-space" and
* "pcs".
*/
char *babl_icc_get_key (const char *icc_data,
int icc_length,
const char *key,
const char *language,
const char *counter);
/**
* babl_format:
*
* Returns the babl object representing the color format given by
* @name such as for example "RGB u8", "CMYK float" or "CIE Lab u16".
*/
const Babl * babl_format (const char *name);
/**
* babl_format_exists:
*
* Returns 1 if the provided format name is known by babl or 0 if it is
* not. Can also be used to verify that specific extension formats are
* available (though this can also be inferred from the version of babl).
*/
int babl_format_exists (const char *name);
/**
* babl_format_with_space:
*
* Returns the babl object representing the color format given by
* @name such as for example "RGB u8", "R'G'B'A float", "Y float" with
* a specific RGB working space used as the space, the resulting format
* has -space suffixed to it, unless the space requested is sRGB then
* the unsuffixed version is used. If a format is passed in as space
* the space of the format is used.
*/
const Babl * babl_format_with_space (const char *name, const Babl *space);
/*
* babl_format_get_space:
*
* Retrieve the RGB color space used for a pixel format.
*/
const Babl * babl_format_get_space (const Babl *format);
/**
* babl_fish:
*
* Create a babl fish capable of converting from source_format to
* destination_format, source and destination can be either strings
* with the names of the formats or Babl-format objects.
*/
const Babl * babl_fish (const void *source_format,
const void *destination_format);
/**
* babl_fast_fish:
*
* Creae a faster than normal fish with specified performance (and thus
* corresponding precision tradeoff), values tolerance can hold: NULL and
* "default", means do same as babl_fish(), other values understood in
* increasing order of speed gain are:
* "exact" "precise" "fast" "glitch"
*
* Fast fishes should be cached, since they are not internally kept track
* of/made into singletons by babl and many creations of fast fishes will
* otherwise be a leak.
*
*/
const Babl * babl_fast_fish (const void *source_format,
const void *destination_format,
const char *performance);
/**
* babl_process:
*
* Process n pixels from source to destination using babl_fish,
* returns number of pixels converted.
*/
long babl_process (const Babl *babl_fish,
const void *source,
void *destination,
long n);
long babl_process_rows (const Babl *babl_fish,
const void *source,
int source_stride,
void *dest,
int dest_stride,
long n,
int rows);
/**
* babl_get_name:
*
* Returns a string describing a Babl object.
*/
const char * babl_get_name (const Babl *babl);
/**
* babl_format_has_alpha:
*
* Returns whether the @format has an alpha channel.
*/
int babl_format_has_alpha (const Babl *format);
/**
* babl_format_get_bytes_per_pixel:
*
* Returns the bytes per pixel for a babl color format.
*/
int babl_format_get_bytes_per_pixel (const Babl *format);
/**
* babl_format_get_model:
*
* Return the model used for constructing the format.
*/
const Babl * babl_format_get_model (const Babl *format);
/**
* babl_format_get_n_components:
*
* Returns the number of components for the given @format.
*/
int babl_format_get_n_components (const Babl *format);
/**
* babl_format_get_type:
*
* Returns the type in the given @format for the given
* @component_index.
*/
const Babl * babl_format_get_type (const Babl *format,
int component_index);
/**
* babl_type_new:
*
* Defines a new data type in babl. A data type that babl can have in
* its buffers requires conversions to and from "double" to be
* registered before passing sanity.
*
* babl_type_new (const char *name,
* "bits", int bits,
* ["min_val", double min_val,]
* ["max_val", double max_val,]
* NULL);
*/
const Babl * babl_type_new (void *first_arg,
...) BABL_ARG_NULL_TERMINATED;
/**
* babl_component_new:
*
* Defines a new color component with babl.
*
* babl_component_new (const char *name,
* NULL);
*/
const Babl * babl_component_new (void *first_arg,
...) BABL_ARG_NULL_TERMINATED;
/**
* babl_model_new:
*
* Defines a new color model in babl. If no name is provided a name is
* generated by concatenating the name of all the involved components.
*
* babl_model_new (["name", const char *name,]
* BablComponent *component1,
* [BablComponent *componentN, ...]
* NULL);
*/
const Babl * babl_model_new (void *first_arg,
...) BABL_ARG_NULL_TERMINATED;
/**
* babl_format_new:
*
* Defines a new pixel format in babl. Provided BablType and|or
* BablSampling is valid for the following components as well. If no
* name is provided a (long) descriptive name is used.
*
* babl_format_new (["name", const char *name,]
* BablModel *model,
* [BablType *type,]
* [BablSampling, *sampling,]
* BablComponent *component1,
* [[BablType *type,]
* [BablSampling *sampling,]
* BablComponent *componentN,
* ...]
* ["planar",]
* NULL);
*/
const Babl * babl_format_new (const void *first_arg,
...) BABL_ARG_NULL_TERMINATED;
/*
* babl_format_n:
*
* Defines a new pixel format in babl. With the specified data storage
* type and the given number of components. At the moment behavior of
* conversions are only well defined to other babl_format_n derived formats
* with the same number of components.
*/
const Babl *
babl_format_n (const Babl *type,
int components);
/**
* babl_format_is_format_n:
*
* Returns whether the @format is a format_n type.
*/
int babl_format_is_format_n (const Babl *format);
/**
* babl_conversion_new:
*
* Defines a new conversion between either two formats, two models or
* two types in babl.
*
* babl_conversion_new (<BablFormat *source, BablFormat *destination|
* BablModel *source, BablModel *destination|
* BablType *source, BablType *destination>,
* <"linear"|"planar">, <BablFuncLinear | BablFuncPlanar> conv_func,
* NULL);
*/
const Babl * babl_conversion_new (const void *first_arg,
...) BABL_ARG_NULL_TERMINATED;
/**
* babl_conversion_get_source_space:
*
* Returns the RGB space defined for the source of conversion.
*/
const Babl *babl_conversion_get_source_space (const Babl *conversion);
/**
* babl_conversion_get_destination_space:
*
* Returns the RGB space defined for the destination of conversion.
*/
const Babl *babl_conversion_get_destination_space (const Babl *conversion);
/**
* babl_new_palette:
*
* create a new palette based format, name is optional pass in NULL to get
* an anonymous format. If you pass in with_alpha the format also gets
* an 8bit alpha channel. Returns the BablModel of the color model. If
* you pass in the same name the previous formats will be provided
* again.
*/
const Babl *babl_new_palette (const char *name,
const Babl **format_u8,
const Babl **format_u8_with_alpha);
/**
* babl_format_is_palette:
*
* check whether a format is a palette backed format.
*/
int babl_format_is_palette (const Babl *format);
/**
* babl_palette_set_palette:
*
* Assign a palette to a palette format, the data is a single span of pixels
* representing the colors of the palette.
*/
void babl_palette_set_palette (const Babl *babl,
const Babl *format,
void *data,
int count);
/**
* babl_palette_reset:
*
* reset a palette to initial state, frees up some caches that optimize
* conversions.
*/
void babl_palette_reset (const Babl *babl);
/**
* babl_set_user_data: (skip)
*
* associate a data pointer with a format/model, this data can be accessed and
* used from the conversion functions, encoding color profiles, palettes or
* similar with the data, perhaps this should be made internal API, not
* accesible at all from
*/
void babl_set_user_data (const Babl *babl, void *data);
/**
* babl_get_user_data: (skip)
*
* Get data set with babl_set_user_data
*/
void * babl_get_user_data (const Babl *babl);
#ifdef __cplusplus
}
#endif
#endif
/* Trademarks:
*
* International Color Consortium is a registered trademarks of the.
* International Color Consortium.
* Apple is a trademark or registered trademark of Apple Inc in many countries.
* Adobish is meant to concisely convey resemblence/compatibility with Adobe
* RGB- without actualy being it, Adobe is a trademark or registered trademark
* of Adobe Systems Incorporated in many countires.
*/
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