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Kamrdip Joshi
237
include/mupdf/fitz/colorspace.h
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237
include/mupdf/fitz/colorspace.h
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#ifndef MUPDF_FITZ_COLORSPACE_H
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#define MUPDF_FITZ_COLORSPACE_H
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#include "mupdf/fitz/system.h"
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#include "mupdf/fitz/context.h"
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#include "mupdf/fitz/store.h"
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enum { FZ_MAX_COLORS = 32 };
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enum
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{
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/* Same order as needed by lcms */
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FZ_RI_PERCEPTUAL,
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FZ_RI_RELATIVE_COLORIMETRIC,
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FZ_RI_SATURATION,
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FZ_RI_ABSOLUTE_COLORIMETRIC,
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};
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enum
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{
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FZ_COLORSPACE_IS_DEVICE = 1,
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FZ_COLORSPACE_IS_ICC = 2,
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FZ_COLORSPACE_IS_CAL = 4,
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FZ_COLORSPACE_LAST_PUBLIC_FLAG = 8,
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};
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typedef struct fz_color_params_s fz_color_params;
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struct fz_color_params_s
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{
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uint8_t ri;
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uint8_t bp;
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uint8_t op;
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uint8_t opm;
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};
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int fz_lookup_rendering_intent(const char *name);
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char *fz_rendering_intent_name(int ri);
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/*
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A fz_colorspace object represents an abstract colorspace. While
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this should be treated as a black box by callers of the library at
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this stage, know that it encapsulates knowledge of how to convert
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colors to and from the colorspace, any lookup tables generated, the
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number of components in the colorspace etc.
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*/
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typedef struct fz_colorspace_s fz_colorspace;
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enum fz_colorspace_type
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{
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FZ_COLORSPACE_NONE,
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FZ_COLORSPACE_GRAY,
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FZ_COLORSPACE_RGB,
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FZ_COLORSPACE_BGR,
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FZ_COLORSPACE_CMYK,
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FZ_COLORSPACE_LAB,
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FZ_COLORSPACE_INDEXED,
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FZ_COLORSPACE_SEPARATION,
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};
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enum fz_colorspace_type fz_colorspace_type(fz_context *ctx, fz_colorspace *cs);
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/*
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A fz_iccprofile object encapsulates details about the icc profile. It
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also includes the profile handle provided by the cmm and as such is used
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in the creation of links between color spaces.
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*/
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typedef struct fz_iccprofile_s fz_iccprofile;
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/*
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A fz_icclink object encapsulates details about the link between profiles.
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*/
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typedef struct fz_icclink_s fz_icclink;
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/*
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Used to communicate any document internal page specific default color spaces.
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*/
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typedef struct fz_default_colorspaces_s fz_default_colorspaces;
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/*
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fz_colorspace_is_subtractive: Return true if a colorspace is subtractive.
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True for CMYK, Separation and DeviceN colorspaces.
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*/
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int fz_colorspace_is_subtractive(fz_context *ctx, const fz_colorspace *cs);
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/*
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fz_colorspace_device_n_has_only_cmyk: Return true if devicen color space
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has only colorants from the cmyk set.
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*/
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int fz_colorspace_device_n_has_only_cmyk(fz_context *ctx, const fz_colorspace *cs);
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/*
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fz_colorspace_device_n_has_cmyk: Return true if devicen color space has cyan
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magenta yellow or black as one of its colorants.
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*/
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int fz_colorspace_device_n_has_cmyk(fz_context *ctx, const fz_colorspace *cs);
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/*
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Colorspace feature test functions.
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*/
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int fz_colorspace_is_gray(fz_context *ctx, const fz_colorspace *cs);
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int fz_colorspace_is_rgb(fz_context *ctx, const fz_colorspace *cs);
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int fz_colorspace_is_bgr(fz_context *ctx, const fz_colorspace *cs);
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int fz_colorspace_is_cmyk(fz_context *ctx, const fz_colorspace *cs);
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int fz_colorspace_is_lab(fz_context *ctx, const fz_colorspace *cs);
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int fz_colorspace_is_indexed(fz_context *ctx, const fz_colorspace *cs);
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int fz_colorspace_is_device_n(fz_context *ctx, const fz_colorspace *cs);
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int fz_colorspace_is_device(fz_context *ctx, const fz_colorspace *cs);
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int fz_colorspace_is_icc(fz_context *ctx, const fz_colorspace *cs);
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int fz_colorspace_is_cal(fz_context *ctx, const fz_colorspace *cs);
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int fz_colorspace_is_device_gray(fz_context *ctx, const fz_colorspace *cs);
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int fz_colorspace_is_device_cmyk(fz_context *ctx, const fz_colorspace *cs);
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int fz_colorspace_is_lab_icc(fz_context *ctx, const fz_colorspace *cs);
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/*
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fz_device_gray: Get colorspace representing device specific gray.
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*/
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fz_colorspace *fz_device_gray(fz_context *ctx);
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/*
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fz_device_rgb: Get colorspace representing device specific rgb.
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*/
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fz_colorspace *fz_device_rgb(fz_context *ctx);
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/*
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fz_device_bgr: Get colorspace representing device specific bgr.
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*/
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fz_colorspace *fz_device_bgr(fz_context *ctx);
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/*
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fz_device_cmyk: Get colorspace representing device specific CMYK.
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*/
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fz_colorspace *fz_device_cmyk(fz_context *ctx);
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/*
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fz_device_lab: Get colorspace representing device specific LAB.
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*/
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fz_colorspace *fz_device_lab(fz_context *ctx);
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/*
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fz_default_color_params: Get default color params for general color conversion.
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*/
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const fz_color_params *fz_default_color_params(fz_context *ctx);
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typedef void (fz_colorspace_convert_fn)(fz_context *ctx, const fz_colorspace *cs, const float *src, float *dst);
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typedef void (fz_colorspace_destruct_fn)(fz_context *ctx, fz_colorspace *cs);
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typedef fz_colorspace *(fz_colorspace_base_fn)(const fz_colorspace *cs);
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typedef void (fz_colorspace_clamp_fn)(const fz_colorspace *cs, const float *src, float *dst);
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fz_colorspace *fz_new_colorspace(fz_context *ctx, const char *name, enum fz_colorspace_type type, int flags, int n, fz_colorspace_convert_fn *to_ccs, fz_colorspace_convert_fn *from_ccs, fz_colorspace_base_fn *base, fz_colorspace_clamp_fn *clamp, fz_colorspace_destruct_fn *destruct, void *data, size_t size);
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void fz_colorspace_name_colorant(fz_context *ctx, fz_colorspace *cs, int n, const char *name);
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const char *fz_colorspace_colorant(fz_context *ctx, const fz_colorspace *cs, int n);
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fz_colorspace *fz_new_indexed_colorspace(fz_context *ctx, fz_colorspace *base, int high, unsigned char *lookup);
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fz_colorspace *fz_keep_colorspace(fz_context *ctx, fz_colorspace *colorspace);
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fz_colorspace *fz_keep_colorspace_store_key(fz_context *ctx, fz_colorspace *colorspace);
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void fz_drop_colorspace_store_key(fz_context *ctx, fz_colorspace *colorspace);
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void fz_drop_colorspace(fz_context *ctx, fz_colorspace *colorspace);
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void fz_drop_colorspace_imp(fz_context *ctx, fz_storable *colorspace);
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fz_colorspace *fz_colorspace_base(fz_context *ctx, const fz_colorspace *cs);
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void fz_set_icc_bgr(fz_context *ctx, fz_colorspace *cs);
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int fz_colorspace_n(fz_context *ctx, const fz_colorspace *cs);
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int fz_colorspace_devicen_n(fz_context *ctx, const fz_colorspace *cs);
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const char *fz_colorspace_name(fz_context *ctx, const fz_colorspace *cs);
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void fz_clamp_color(fz_context *ctx, const fz_colorspace *cs, const float *in, float *out);
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void fz_convert_color(fz_context *ctx, const fz_color_params *params, const fz_colorspace *intcs, const fz_colorspace *dscs, float *dstv, const fz_colorspace *srcs, const float *srcv);
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typedef struct fz_color_converter_s fz_color_converter;
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/* This structure is public because it allows us to avoid dynamic allocations.
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* Callers should only rely on the convert entry - the rest of the structure
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* is subject to change without notice.
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*/
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struct fz_color_converter_s
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{
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void (*convert)(fz_context *, fz_color_converter *, float *, const float *);
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const fz_colorspace *ds;
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const fz_colorspace *ss;
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const fz_colorspace *is;
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void *opaque;
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void *link;
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int n;
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};
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void fz_find_color_converter(fz_context *ctx, fz_color_converter *cc, const fz_colorspace *is, const fz_colorspace *ds, const fz_colorspace *ss, const fz_color_params *params);
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void fz_drop_color_converter(fz_context *ctx, fz_color_converter *cc);
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void fz_init_cached_color_converter(fz_context *ctx, fz_color_converter *cc, fz_colorspace *is, fz_colorspace *ds, fz_colorspace *ss, const fz_color_params *params);
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void fz_fin_cached_color_converter(fz_context *ctx, fz_color_converter *cc);
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/* Public to allow use in icc creation */
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typedef struct fz_cal_colorspace_s fz_cal_colorspace;
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struct fz_cal_colorspace_s {
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float wp[3];
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float bp[3];
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float gamma[3];
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float matrix[9];
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int n;
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fz_iccprofile *profile;
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};
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/*
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icc methods
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*/
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fz_colorspace *fz_new_icc_colorspace(fz_context *ctx, const char *name, int num, fz_buffer *buf);
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fz_colorspace *fz_new_icc_colorspace_from_file(fz_context *ctx, const char *name, const char *path);
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fz_colorspace *fz_new_icc_colorspace_from_stream(fz_context *ctx, const char *name, fz_stream *in);
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fz_colorspace *fz_new_cal_colorspace(fz_context *ctx, const char *name, float *wp, float *bp, float *gamma, float *matrix);
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fz_buffer *fz_new_icc_data_from_cal_colorspace(fz_context *ctx, fz_cal_colorspace *cal);
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fz_buffer *fz_icc_data_from_icc_colorspace(fz_context *ctx, const fz_colorspace *cs);
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/* Default cs */
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fz_default_colorspaces *fz_new_default_colorspaces(fz_context *ctx);
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fz_default_colorspaces* fz_keep_default_colorspaces(fz_context *ctx, fz_default_colorspaces *default_cs);
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void fz_drop_default_colorspaces(fz_context *ctx, fz_default_colorspaces *default_cs);
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fz_default_colorspaces *fz_clone_default_colorspaces(fz_context *ctx, fz_default_colorspaces *base);
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/* Do we want to make fz_default_colorspaces public and get rid of these? */
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void fz_set_default_gray(fz_context *ctx, fz_default_colorspaces *default_cs, fz_colorspace *cs);
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void fz_set_default_rgb(fz_context *ctx, fz_default_colorspaces *default_cs, fz_colorspace *cs);
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void fz_set_default_cmyk(fz_context *ctx, fz_default_colorspaces *default_cs, fz_colorspace *cs);
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void fz_set_default_output_intent(fz_context *ctx, fz_default_colorspaces *default_cs, fz_colorspace *cs);
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fz_colorspace *fz_default_gray(fz_context *ctx, const fz_default_colorspaces *default_cs);
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fz_colorspace *fz_default_rgb(fz_context *ctx, const fz_default_colorspaces *default_cs);
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fz_colorspace *fz_default_cmyk(fz_context *ctx, const fz_default_colorspaces *default_cs);
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fz_colorspace *fz_default_output_intent(fz_context *ctx, const fz_default_colorspaces *default_cs);
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#endif
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