rsrc.h

来自「SumatraPDF是一款小型开源的pdf阅读工具。虽然玲珑小巧（只有800多K」· C头文件 代码 · 共 249 行

/*
 * Resource store
 */

typedef struct pdf_store_s pdf_store;

typedef enum pdf_itemkind_e
{
	PDF_KCOLORSPACE,
	PDF_KFUNCTION,
	PDF_KXOBJECT,
	PDF_KIMAGE,
	PDF_KPATTERN,
	PDF_KSHADE,
	PDF_KCMAP,
	PDF_KFONT
} pdf_itemkind;

fz_error *pdf_newstore(pdf_store **storep);
void pdf_emptystore(pdf_store *store);
void pdf_dropstore(pdf_store *store);

fz_error *pdf_storeitem(pdf_store *store, pdf_itemkind tag, fz_obj *key, void *val);
void *pdf_finditem(pdf_store *store, pdf_itemkind tag, fz_obj *key);
fz_error *pdf_removeitem(pdf_store *store, pdf_itemkind tag, fz_obj *key);

fz_error *pdf_loadresources(fz_obj **rdb, pdf_xref *xref, fz_obj *orig);

/*
 * Functions
 */

typedef struct pdf_function_s pdf_function;

fz_error *pdf_loadfunction(pdf_function **func, pdf_xref *xref, fz_obj *ref);
fz_error *pdf_evalfunction(pdf_function *func, float *in, int inlen, float *out, int outlen);
pdf_function *pdf_keepfunction(pdf_function *func);
void pdf_dropfunction(pdf_function *func);

/*
 * ColorSpace
 */

typedef struct pdf_indexed_s pdf_indexed;

struct pdf_indexed_s
{
	fz_colorspace super;	/* hmmm... */
	fz_colorspace *base;
	int high;
	unsigned char *lookup;
};

extern fz_colorspace *pdf_devicegray;
extern fz_colorspace *pdf_devicergb;
extern fz_colorspace *pdf_devicecmyk;
extern fz_colorspace *pdf_devicelab;
extern fz_colorspace *pdf_devicepattern;

void pdf_convcolor(fz_colorspace *ss, float *sv, fz_colorspace *ds, float *dv);
void pdf_convpixmap(fz_colorspace *ss, fz_pixmap *sp, fz_colorspace *ds, fz_pixmap *dp);

fz_error *pdf_loadcolorspace(fz_colorspace **csp, pdf_xref *xref, fz_obj *obj);

/*
 * Pattern
 */

typedef struct pdf_pattern_s pdf_pattern;

struct pdf_pattern_s
{
	int refs;
	int ismask;
	float xstep;
	float ystep;
	fz_matrix matrix;
	fz_rect bbox;
	fz_tree *tree;
};

fz_error *pdf_loadpattern(pdf_pattern **patp, pdf_xref *xref, fz_obj *obj, fz_obj *ref);
pdf_pattern *pdf_keeppattern(pdf_pattern *pat);
void pdf_droppattern(pdf_pattern *pat);

/*
 * Shading
 */

void pdf_setmeshvalue(float *mesh, int i, float x, float y, float t);
fz_error *pdf_loadshadefunction(fz_shade *shade, pdf_xref *xref, fz_obj *dict, float t0, float t1);
fz_error *pdf_loadtype1shade(fz_shade *, pdf_xref *, fz_obj *dict, fz_obj *ref);
fz_error *pdf_loadtype2shade(fz_shade *, pdf_xref *, fz_obj *dict, fz_obj *ref);
fz_error *pdf_loadtype3shade(fz_shade *, pdf_xref *, fz_obj *dict, fz_obj *ref);
fz_error *pdf_loadtype4shade(fz_shade *, pdf_xref *, fz_obj *dict, fz_obj *ref);
fz_error *pdf_loadtype5shade(fz_shade *, pdf_xref *, fz_obj *dict, fz_obj *ref);
fz_error *pdf_loadtype6shade(fz_shade *, pdf_xref *, fz_obj *dict, fz_obj *ref);
fz_error *pdf_loadtype7shade(fz_shade *, pdf_xref *, fz_obj *dict, fz_obj *ref);
fz_error *pdf_loadshade(fz_shade **shadep, pdf_xref *xref, fz_obj *obj, fz_obj *ref);

/*
 * XObject
 */

typedef struct pdf_xobject_s pdf_xobject;

struct pdf_xobject_s
{
	int refs;
	fz_matrix matrix;
	fz_rect bbox;
	int isolated;
	int knockout;
	fz_obj *resources;
	fz_buffer *contents;
};

fz_error *pdf_loadxobject(pdf_xobject **xobjp, pdf_xref *xref, fz_obj *obj, fz_obj *ref);
pdf_xobject *pdf_keepxobject(pdf_xobject *xobj);
void pdf_dropxobject(pdf_xobject *xobj);

/*
 * Image
 */

typedef struct pdf_image_s pdf_image;

struct pdf_image_s
{
	fz_image super;
	fz_image *mask;			/* explicit mask with subimage */
	int usecolorkey;		/* explicit color-keyed masking */
	int colorkey[FZ_MAXCOLORS * 2];
	pdf_indexed *indexed;
	float decode[32];
	int bpc;
	int stride;
	fz_buffer *samples;
};

fz_error *pdf_loadinlineimage(pdf_image **imgp, pdf_xref *xref, fz_obj *rdb, fz_obj *dict, fz_stream *file);
fz_error *pdf_loadimage(pdf_image **imgp, pdf_xref *xref, fz_obj *obj, fz_obj *ref);
fz_error *pdf_loadtile(fz_image *image, fz_pixmap *tile);

/*
 * CMap
 */

typedef struct pdf_cmap_s pdf_cmap;

fz_error *pdf_newcmap(pdf_cmap **cmapp);
pdf_cmap *pdf_keepcmap(pdf_cmap *cmap);
void pdf_dropcmap(pdf_cmap *cmap);

void pdf_debugcmap(pdf_cmap *cmap);
int pdf_getwmode(pdf_cmap *cmap);
pdf_cmap *fz_getusecmap(pdf_cmap *cmap);
void fz_setwmode(pdf_cmap *cmap, int wmode);
void fz_setusecmap(pdf_cmap *cmap, pdf_cmap *usecmap);

fz_error *pdf_addcodespace(pdf_cmap *cmap, unsigned lo, unsigned hi, int n);

fz_error *pdf_maprangetotable(pdf_cmap *cmap, int low, int *map, int len);
fz_error *pdf_maprangetorange(pdf_cmap *cmap, int srclo, int srchi, int dstlo);
fz_error *pdf_maponetomany(pdf_cmap *cmap, int one, int *many, int len);
fz_error *pdf_sortcmap(pdf_cmap *cmap);

int pdf_lookupcmap(pdf_cmap *cmap, int cpt);
unsigned char *pdf_decodecmap(pdf_cmap *cmap, unsigned char *s, int *cpt);

fz_error *pdf_parsecmap(pdf_cmap **cmapp, fz_stream *file);
fz_error *pdf_loadembeddedcmap(pdf_cmap **cmapp, pdf_xref *xref, fz_obj *ref);
fz_error *pdf_loadsystemcmap(pdf_cmap **cmapp, char *name);
fz_error *pdf_newidentitycmap(pdf_cmap **cmapp, int wmode, int bytes);

/*
 * Font
 */

void pdf_loadencoding(char **estrings, char *encoding);
int pdf_lookupagl(char *name, int *ucsbuf, int ucscap);

extern const unsigned short pdf_docencoding[256];
extern const char * const pdf_macroman[256];
extern const char * const pdf_macexpert[256];
extern const char * const pdf_winansi[256];
extern const char * const pdf_standard[256];
extern const char * const pdf_expert[256];
extern const char * const pdf_symbol[256];
extern const char * const pdf_zapfdingbats[256];

typedef struct pdf_font_s pdf_font;

struct pdf_font_s
{
	fz_font super;

	/* FontDescriptor */
	int flags;
	float italicangle;
	float ascent;
	float descent;
	float capheight;
	float xheight;
	float missingwidth;

	/* Encoding (CMap) */
	pdf_cmap *encoding;
	pdf_cmap *tottfcmap;
	int ncidtogid;
	unsigned short *cidtogid;

	/* ToUnicode */
	pdf_cmap *tounicode;
	int ncidtoucs;
	unsigned short *cidtoucs;

	/* Freetype */
	int substitute;
	void *ftface;
	char *filename;
	fz_buffer *fontdata;

	/* Type3 data */
	fz_matrix matrix;
	fz_tree *charprocs[256];

	int hint;
};

/* unicode.c */
fz_error *pdf_loadtounicode(pdf_font *font, pdf_xref *xref, char **strings, char *collection, fz_obj *cmapstm);

/* fontfile.c */
fz_error *pdf_loadbuiltinfont(pdf_font *font, char *basefont);
fz_error *pdf_loadembeddedfont(pdf_font *font, pdf_xref *xref, fz_obj *stmref);
fz_error *pdf_loadsystemfont(pdf_font *font, char *basefont, char *collection);
fz_error *pdf_loadsubstitutefont(pdf_font *font, int fdflags, char *collection);

/* type3.c */
fz_error *pdf_loadtype3font(pdf_font **fontp, pdf_xref *xref, fz_obj *obj, fz_obj *ref);

/* font.c */
char *ft_errstr(int err);
fz_error *pdf_loadfontdescriptor(pdf_font *font, pdf_xref *xref, fz_obj *desc, char *collection);
fz_error *pdf_loadfont(pdf_font **fontp, pdf_xref *xref, fz_obj *obj, fz_obj *ref);
void pdf_dropfont(pdf_font *font);