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|
#ifndef _FITZ_H_
#define _FITZ_H_
/*
* Include the standard libc headers.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdarg.h>
#include <string.h>
#include <math.h>
#include <assert.h>
#include <errno.h>
#include <limits.h> /* INT_MAX & co */
#include <float.h> /* FLT_EPSILON */
#include <fcntl.h> /* O_RDONLY & co */
#define nil ((void*)0)
#define nelem(x) (sizeof(x)/sizeof((x)[0]))
/*
* Some differences in libc can be smoothed over
*/
#ifdef _MSC_VER /* Microsoft Visual C */
#pragma warning( disable: 4244 ) /* conversion from X to Y, possible loss of data */
#pragma warning( disable: 4996 ) /* The POSIX name for this item is deprecated */
#pragma warning( disable: 4996 ) /* This function or variable may be unsafe */
#include <io.h>
int gettimeofday(struct timeval *tv, struct timezone *tz);
#define snprintf _snprintf
#define strtoll _strtoi64
#else /* Unix or close enough */
#include <unistd.h>
#ifndef O_BINARY
#define O_BINARY 0
#endif
#endif
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#ifndef M_SQRT2
#define M_SQRT2 1.41421356237309504880
#endif
/*
* Variadic macros, inline and restrict keywords
*/
#if __STDC_VERSION__ == 199901L /* C99 */
#define fz_throw(...) fz_throwimp(__FILE__, __LINE__, __func__, __VA_ARGS__)
#define fz_rethrow(cause, ...) fz_rethrowimp(__FILE__, __LINE__, __func__, cause, __VA_ARGS__)
#define fz_catch(cause, ...) fz_catchimp(__FILE__, __LINE__, __func__, cause, __VA_ARGS__)
#elif _MSC_VER >= 1500 /* MSVC 9 or newer */
#define inline __inline
#define restrict __restrict
#define fz_throw(...) fz_throwimp(__FILE__, __LINE__, __FUNCTION__, __VA_ARGS__)
#define fz_rethrow(cause, ...) fz_rethrowimp(__FILE__, __LINE__, __FUNCTION__, cause, __VA_ARGS__)
#define fz_catch(cause, ...) fz_catchimp(__FILE__, __LINE__, __FUNCTION__, cause, __VA_ARGS__)
#elif __GNUC__ >= 3 /* GCC 3 or newer */
#define inline __inline
#define restrict __restrict
#define fz_throw(fmt...) fz_throwimp(__FILE__, __LINE__, __FUNCTION__, fmt)
#define fz_rethrow(cause, fmt...) fz_rethrowimp(__FILE__, __LINE__, __FUNCTION__, cause, fmt)
#define fz_catch(cause, fmt...) fz_catchimp(__FILE__, __LINE__, __FUNCTION__, cause, fmt)
#else /* Unknown or ancient */
#define inline
#define restrict
#define fz_throw fz_throwimpx
#define fz_rethrow fz_rethrowimpx
#define fz_catch fz_catchimpx
#endif
/*
* GCC can do type checking of printf strings
*/
#ifndef __printflike
#if __GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ >= 7
#define __printflike(fmtarg, firstvararg) \
__attribute__((__format__ (__printf__, fmtarg, firstvararg)))
#else
#define __printflike(fmtarg, firstvararg)
#endif
#endif
/*
* Error handling
*/
typedef int fz_error;
void fz_warn(char *fmt, ...) __printflike(1, 2);
void fz_flushwarnings(void);
fz_error fz_throwimp(const char *file, int line, const char *func, char *fmt, ...) __printflike(4, 5);
fz_error fz_rethrowimp(const char *file, int line, const char *func, fz_error cause, char *fmt, ...) __printflike(5, 6);
void fz_catchimp(const char *file, int line, const char *func, fz_error cause, char *fmt, ...) __printflike(5, 6);
fz_error fz_throwimpx(char *fmt, ...) __printflike(1, 2);
fz_error fz_rethrowimpx(fz_error cause, char *fmt, ...) __printflike(2, 3);
void fz_catchimpx(fz_error cause, char *fmt, ...) __printflike(2, 3);
#define fz_okay ((fz_error)0)
/* extract the last error stack trace */
int fz_geterrorcount(void);
char *fz_geterrorline(int n);
/*
* Basic runtime and utility functions
*/
#define ABS(x) ( (x) < 0 ? -(x) : (x) )
#define MIN(a,b) ( (a) < (b) ? (a) : (b) )
#define MAX(a,b) ( (a) > (b) ? (a) : (b) )
#define CLAMP(x,a,b) ( (x) > (b) ? (b) : ( (x) < (a) ? (a) : (x) ) )
/* memory allocation */
void *fz_malloc(int size);
void *fz_calloc(int count, int size);
void *fz_realloc(void *p, int count, int size);
void fz_free(void *p);
char *fz_strdup(char *s);
/* runtime (hah!) test for endian-ness */
int fz_isbigendian(void);
/* safe string functions */
char *fz_strsep(char **stringp, const char *delim);
int fz_strlcpy(char *dst, const char *src, int n);
int fz_strlcat(char *dst, const char *src, int n);
/* utf-8 encoding and decoding */
int chartorune(int *rune, char *str);
int runetochar(char *str, int *rune);
int runelen(int c);
/* getopt */
extern int fz_getopt(int nargc, char * const *nargv, const char *ostr);
extern int fz_optind;
extern char *fz_optarg;
/*
* Generic hash-table with fixed-length keys.
*/
typedef struct fz_hashtable_s fz_hashtable;
fz_hashtable *fz_newhash(int initialsize, int keylen);
void fz_debughash(fz_hashtable *table);
void fz_emptyhash(fz_hashtable *table);
void fz_freehash(fz_hashtable *table);
void *fz_hashfind(fz_hashtable *table, void *key);
void fz_hashinsert(fz_hashtable *table, void *key, void *val);
void fz_hashremove(fz_hashtable *table, void *key);
int fz_hashlen(fz_hashtable *table);
void *fz_hashgetkey(fz_hashtable *table, int idx);
void *fz_hashgetval(fz_hashtable *table, int idx);
/*
* Math and geometry
*/
/* Multiply scaled two integers in the 0..255 range */
static inline int fz_mul255(int a, int b)
{
/* see Jim Blinn's book "Dirty Pixels" for how this works */
int x = a * b + 128;
x += x >> 8;
return x >> 8;
}
/* Expand a value A from the 0...255 range to the 0..256 range */
#define FZ_EXPAND(A) ((A)+((A)>>7))
/* Combine values A (in any range) and B (in the 0..256 range),
* to give a single value in the same range as A was. */
#define FZ_COMBINE(A,B) (((A)*(B))>>8)
/* Combine values A and C (in the same (any) range) and B and D (in the
* 0..256 range), to give a single value in the same range as A and C were. */
#define FZ_COMBINE2(A,B,C,D) (FZ_COMBINE((A), (B)) + FZ_COMBINE((C), (D)))
/* Blend SRC and DST (in the same range) together according to
* AMOUNT (in the 0...256 range). */
#define FZ_BLEND(SRC, DST, AMOUNT) ((((SRC)-(DST))*(AMOUNT) + ((DST)<<8))>>8)
typedef struct fz_matrix_s fz_matrix;
typedef struct fz_point_s fz_point;
typedef struct fz_rect_s fz_rect;
typedef struct fz_bbox_s fz_bbox;
extern const fz_rect fz_unitrect;
extern const fz_rect fz_emptyrect;
extern const fz_rect fz_infiniterect;
extern const fz_bbox fz_unitbbox;
extern const fz_bbox fz_emptybbox;
extern const fz_bbox fz_infinitebbox;
#define fz_isemptyrect(r) ((r).x0 == (r).x1)
#define fz_isinfiniterect(r) ((r).x0 > (r).x1)
#define fz_isemptybbox(b) ((b).x0 == (b).x1)
#define fz_isinfinitebbox(b) ((b).x0 > (b).x1)
struct fz_matrix_s
{
float a, b, c, d, e, f;
};
struct fz_point_s
{
float x, y;
};
struct fz_rect_s
{
float x0, y0;
float x1, y1;
};
struct fz_bbox_s
{
int x0, y0;
int x1, y1;
};
extern const fz_matrix fz_identity;
fz_matrix fz_concat(fz_matrix one, fz_matrix two);
fz_matrix fz_scale(float sx, float sy);
fz_matrix fz_rotate(float theta);
fz_matrix fz_translate(float tx, float ty);
fz_matrix fz_invertmatrix(fz_matrix m);
int fz_isrectilinear(fz_matrix m);
float fz_matrixexpansion(fz_matrix m);
fz_bbox fz_roundrect(fz_rect r);
fz_bbox fz_intersectbbox(fz_bbox a, fz_bbox b);
fz_bbox fz_unionbbox(fz_bbox a, fz_bbox b);
fz_point fz_transformpoint(fz_matrix m, fz_point p);
fz_point fz_transformvector(fz_matrix m, fz_point p);
fz_rect fz_transformrect(fz_matrix m, fz_rect r);
fz_bbox fz_transformbbox(fz_matrix m, fz_bbox b);
/*
* Basic crypto functions.
* Independent of the rest of fitz.
* For further encapsulation in filters, or not.
*/
/* md5 digests */
typedef struct fz_md5_s fz_md5;
struct fz_md5_s
{
unsigned int state[4];
unsigned int count[2];
unsigned char buffer[64];
};
void fz_md5init(fz_md5 *state);
void fz_md5update(fz_md5 *state, const unsigned char *input, const unsigned inlen);
void fz_md5final(fz_md5 *state, unsigned char digest[16]);
/* sha-256 digests */
typedef struct fz_sha256_s fz_sha256;
struct fz_sha256_s
{
unsigned int state[8];
unsigned int count[2];
union {
unsigned char u8[64];
unsigned int u32[16];
} buffer;
};
void fz_sha256init(fz_sha256 *state);
void fz_sha256update(fz_sha256 *state, const unsigned char *input, unsigned int inlen);
void fz_sha256final(fz_sha256 *state, unsigned char digest[32]);
/* arc4 crypto */
typedef struct fz_arc4_s fz_arc4;
struct fz_arc4_s
{
unsigned x;
unsigned y;
unsigned char state[256];
};
void fz_arc4init(fz_arc4 *state, const unsigned char *key, const unsigned len);
void fz_arc4encrypt(fz_arc4 *state, unsigned char *dest, const unsigned char *src, const unsigned len);
/* AES block cipher implementation from XYSSL */
typedef struct fz_aes_s fz_aes;
#define AES_DECRYPT 0
#define AES_ENCRYPT 1
struct fz_aes_s
{
int nr; /* number of rounds */
unsigned long *rk; /* AES round keys */
unsigned long buf[68]; /* unaligned data */
};
void aes_setkey_enc( fz_aes *ctx, const unsigned char *key, int keysize );
void aes_setkey_dec( fz_aes *ctx, const unsigned char *key, int keysize );
void aes_crypt_cbc( fz_aes *ctx, int mode, int length,
unsigned char iv[16],
const unsigned char *input,
unsigned char *output );
/*
* Dynamic objects.
* The same type of objects as found in PDF and PostScript.
* Used by the filters and the mupdf parser.
*/
typedef struct fz_obj_s fz_obj;
typedef struct fz_keyval_s fz_keyval;
struct pdf_xref_s;
typedef enum fz_objkind_e
{
FZ_NULL,
FZ_BOOL,
FZ_INT,
FZ_REAL,
FZ_STRING,
FZ_NAME,
FZ_ARRAY,
FZ_DICT,
FZ_INDIRECT
} fz_objkind;
struct fz_keyval_s
{
fz_obj *k;
fz_obj *v;
};
struct fz_obj_s
{
int refs;
fz_objkind kind;
union
{
int b;
int i;
float f;
struct {
unsigned short len;
char buf[1];
} s;
char n[1];
struct {
int len;
int cap;
fz_obj **items;
} a;
struct {
char sorted;
int len;
int cap;
fz_keyval *items;
} d;
struct {
int num;
int gen;
struct pdf_xref_s *xref;
} r;
} u;
};
fz_obj *fz_newnull(void);
fz_obj *fz_newbool(int b);
fz_obj *fz_newint(int i);
fz_obj *fz_newreal(float f);
fz_obj *fz_newname(char *str);
fz_obj *fz_newstring(char *str, int len);
fz_obj *fz_newindirect(int num, int gen, struct pdf_xref_s *xref);
fz_obj *fz_newarray(int initialcap);
fz_obj *fz_newdict(int initialcap);
fz_obj *fz_copyarray(fz_obj *array);
fz_obj *fz_copydict(fz_obj *dict);
fz_obj *fz_keepobj(fz_obj *obj);
void fz_dropobj(fz_obj *obj);
/* type queries */
int fz_isnull(fz_obj *obj);
int fz_isbool(fz_obj *obj);
int fz_isint(fz_obj *obj);
int fz_isreal(fz_obj *obj);
int fz_isname(fz_obj *obj);
int fz_isstring(fz_obj *obj);
int fz_isarray(fz_obj *obj);
int fz_isdict(fz_obj *obj);
int fz_isindirect(fz_obj *obj);
int fz_objcmp(fz_obj *a, fz_obj *b);
fz_obj *fz_resolveindirect(fz_obj *obj);
/* silent failure, no error reporting */
int fz_tobool(fz_obj *obj);
int fz_toint(fz_obj *obj);
float fz_toreal(fz_obj *obj);
char *fz_toname(fz_obj *obj);
char *fz_tostrbuf(fz_obj *obj);
int fz_tostrlen(fz_obj *obj);
int fz_tonum(fz_obj *obj);
int fz_togen(fz_obj *obj);
int fz_arraylen(fz_obj *array);
fz_obj *fz_arrayget(fz_obj *array, int i);
void fz_arrayput(fz_obj *array, int i, fz_obj *obj);
void fz_arraypush(fz_obj *array, fz_obj *obj);
void fz_arraydrop(fz_obj *array);
void fz_arrayinsert(fz_obj *array, fz_obj *obj);
int fz_dictlen(fz_obj *dict);
fz_obj *fz_dictgetkey(fz_obj *dict, int idx);
fz_obj *fz_dictgetval(fz_obj *dict, int idx);
fz_obj *fz_dictget(fz_obj *dict, fz_obj *key);
fz_obj *fz_dictgets(fz_obj *dict, char *key);
fz_obj *fz_dictgetsa(fz_obj *dict, char *key, char *abbrev);
void fz_dictput(fz_obj *dict, fz_obj *key, fz_obj *val);
void fz_dictputs(fz_obj *dict, char *key, fz_obj *val);
void fz_dictdel(fz_obj *dict, fz_obj *key);
void fz_dictdels(fz_obj *dict, char *key);
void fz_sortdict(fz_obj *dict);
int fz_fprintobj(FILE *fp, fz_obj *obj, int tight);
void fz_debugobj(fz_obj *obj);
void fz_debugref(fz_obj *obj);
char *fz_objkindstr(fz_obj *obj);
/*
* Data buffers.
*/
typedef struct fz_buffer_s fz_buffer;
struct fz_buffer_s
{
int refs;
unsigned char *data;
int cap, len;
};
fz_buffer *fz_newbuffer(int size);
fz_buffer *fz_keepbuffer(fz_buffer *buf);
void fz_dropbuffer(fz_buffer *buf);
void fz_resizebuffer(fz_buffer *buf, int size);
void fz_growbuffer(fz_buffer *buf);
/*
* Buffered reader.
* Only the data between rp and wp is valid data.
*/
typedef struct fz_stream_s fz_stream;
struct fz_stream_s
{
int refs;
int error;
int eof;
int pos;
int avail;
int bits;
unsigned char *bp, *rp, *wp, *ep;
void *state;
int (*read)(fz_stream *stm, unsigned char *buf, int len);
void (*close)(fz_stream *stm);
void (*seek)(fz_stream *stm, int offset, int whence);
unsigned char buf[4096];
};
fz_stream *fz_openfile(int file);
fz_stream *fz_openbuffer(fz_buffer *buf);
void fz_close(fz_stream *stm);
fz_stream *fz_newstream(void*, int(*)(fz_stream*, unsigned char*, int), void(*)(fz_stream *));
fz_stream *fz_keepstream(fz_stream *stm);
void fz_fillbuffer(fz_stream *stm);
int fz_tell(fz_stream *stm);
void fz_seek(fz_stream *stm, int offset, int whence);
int fz_read(fz_stream *stm, unsigned char *buf, int len);
void fz_readline(fz_stream *stm, char *buf, int max);
fz_error fz_readall(fz_buffer **bufp, fz_stream *stm, int initial);
static inline int fz_readbyte(fz_stream *stm)
{
if (stm->rp == stm->wp)
{
fz_fillbuffer(stm);
return stm->rp < stm->wp ? *stm->rp++ : EOF;
}
return *stm->rp++;
}
static inline int fz_peekbyte(fz_stream *stm)
{
if (stm->rp == stm->wp)
{
fz_fillbuffer(stm);
return stm->rp < stm->wp ? *stm->rp : EOF;
}
return *stm->rp;
}
static inline void fz_unreadbyte(fz_stream *stm)
{
if (stm->rp > stm->bp)
stm->rp--;
}
static inline int fz_iseof(fz_stream *stm)
{
if (stm->rp == stm->wp)
{
if (stm->eof)
return 1;
return fz_peekbyte(stm) == EOF;
}
return 0;
}
static inline unsigned int fz_readbits(fz_stream *stm, int n)
{
unsigned int x;
if (n <= stm->avail)
{
stm->avail -= n;
x = (stm->bits >> stm->avail) & ((1 << n) - 1);
}
else
{
x = stm->bits & ((1 << stm->avail) - 1);
n -= stm->avail;
stm->avail = 0;
while (n > 8)
{
x = (x << 8) | fz_readbyte(stm);
n -= 8;
}
if (n > 0)
{
stm->bits = fz_readbyte(stm);
stm->avail = 8 - n;
x = (x << n) | (stm->bits >> stm->avail);
}
}
return x;
}
static inline void fz_syncbits(fz_stream *stm)
{
stm->avail = 0;
}
static inline int fz_iseofbits(fz_stream *stm)
{
return fz_iseof(stm) && (stm->avail == 0 || stm->bits == EOF);
}
/*
* Data filters.
*/
fz_stream *fz_opencopy(fz_stream *chain);
fz_stream *fz_opennull(fz_stream *chain, int len);
fz_stream *fz_openarc4(fz_stream *chain, unsigned char *key, unsigned keylen);
fz_stream *fz_openaesd(fz_stream *chain, unsigned char *key, unsigned keylen);
fz_stream *fz_opena85d(fz_stream *chain);
fz_stream *fz_openahxd(fz_stream *chain);
fz_stream *fz_openrld(fz_stream *chain);
fz_stream *fz_opendctd(fz_stream *chain, fz_obj *param);
fz_stream *fz_openfaxd(fz_stream *chain, fz_obj *param);
fz_stream *fz_openflated(fz_stream *chain);
fz_stream *fz_openlzwd(fz_stream *chain, fz_obj *param);
fz_stream *fz_openpredict(fz_stream *chain, fz_obj *param);
fz_stream *fz_openjbig2d(fz_stream *chain, fz_buffer *global);
/*
* Resources and other graphics related objects.
*/
enum { FZ_MAXCOLORS = 32 };
typedef enum fz_blendmode_e
{
/* PDF 1.4 -- standard separable */
FZ_BNORMAL,
FZ_BMULTIPLY,
FZ_BSCREEN,
FZ_BOVERLAY,
FZ_BDARKEN,
FZ_BLIGHTEN,
FZ_BCOLORDODGE,
FZ_BCOLORBURN,
FZ_BHARDLIGHT,
FZ_BSOFTLIGHT,
FZ_BDIFFERENCE,
FZ_BEXCLUSION,
/* PDF 1.4 -- standard non-separable */
FZ_BHUE,
FZ_BSATURATION,
FZ_BCOLOR,
FZ_BLUMINOSITY,
} fz_blendmode;
extern const char *fz_blendnames[];
/*
* Pixmaps have n components per pixel. the last is always alpha.
* premultiplied alpha when rendering, but non-premultiplied for colorspace
* conversions and rescaling.
*/
typedef struct fz_pixmap_s fz_pixmap;
typedef struct fz_colorspace_s fz_colorspace;
struct fz_pixmap_s
{
int refs;
int x, y, w, h, n;
fz_pixmap *mask; /* explicit soft/image mask */
int interpolate;
fz_colorspace *colorspace;
unsigned char *samples;
int freesamples;
};
fz_pixmap *fz_newpixmapwithdata(fz_colorspace *colorspace, int x, int y, int w, int h, unsigned char *samples);
fz_pixmap *fz_newpixmapwithrect(fz_colorspace *, fz_bbox bbox);
fz_pixmap *fz_newpixmap(fz_colorspace *, int x, int y, int w, int h);
fz_pixmap *fz_keeppixmap(fz_pixmap *pix);
void fz_droppixmap(fz_pixmap *pix);
void fz_clearpixmap(fz_pixmap *pix);
void fz_clearpixmapwithcolor(fz_pixmap *pix, int value);
void fz_premultiplypixmap(fz_pixmap *pix);
fz_pixmap *fz_alphafromgray(fz_pixmap *gray, int luminosity);
fz_bbox fz_boundpixmap(fz_pixmap *pix);
fz_pixmap *fz_scalepixmap(fz_pixmap *src, int xdenom, int ydenom);
fz_pixmap *fz_smoothscalepixmap(fz_pixmap *src, float x, float y, float w, float h);
fz_error fz_writepnm(fz_pixmap *pixmap, char *filename);
fz_error fz_writepam(fz_pixmap *pixmap, char *filename, int savealpha);
fz_error fz_writepng(fz_pixmap *pixmap, char *filename, int savealpha);
fz_error fz_loadjpximage(fz_pixmap **imgp, unsigned char *data, int size);
/*
* Colorspace resources.
*/
extern fz_colorspace *fz_devicegray;
extern fz_colorspace *fz_devicergb;
extern fz_colorspace *fz_devicebgr;
extern fz_colorspace *fz_devicecmyk;
struct fz_colorspace_s
{
int refs;
char name[16];
int n;
void (*toxyz)(fz_colorspace *, float *src, float *xyz);
void (*fromxyz)(fz_colorspace *, float *xyz, float *dst);
void (*freedata)(fz_colorspace *);
void *data;
};
fz_colorspace *fz_newcolorspace(char *name, int n);
fz_colorspace *fz_keepcolorspace(fz_colorspace *cs);
void fz_dropcolorspace(fz_colorspace *cs);
void fz_convertcolor(fz_colorspace *srcs, float *srcv, fz_colorspace *dsts, float *dstv);
void fz_convertpixmap(fz_pixmap *src, fz_pixmap *dst);
/*
* Fonts come in two variants:
* Regular fonts are handled by FreeType.
* Type 3 fonts have callbacks to the interpreter.
*/
struct fz_device_s;
typedef struct fz_font_s fz_font;
char *ft_errorstring(int err);
struct fz_font_s
{
int refs;
char name[32];
void *ftface; /* has an FT_Face if used */
int ftsubstitute; /* ... substitute metrics */
int fthint; /* ... force hinting for DynaLab fonts */
/* origin of font data */
char *ftfile;
unsigned char *ftdata;
int ftsize;
fz_matrix t3matrix;
fz_obj *t3resources;
fz_buffer **t3procs; /* has 256 entries if used */
float *t3widths; /* has 256 entries if used */
void *t3xref; /* a pdf_xref for the callback */
fz_error (*t3run)(struct pdf_xref_s *xref, fz_obj *resources, fz_buffer *contents,
struct fz_device_s *dev, fz_matrix ctm);
fz_rect bbox;
/* substitute metrics */
int widthcount;
int *widthtable;
};
fz_font *fz_newtype3font(char *name, fz_matrix matrix);
fz_error fz_newfontfrombuffer(fz_font **fontp, unsigned char *data, int len, int index);
fz_error fz_newfontfromfile(fz_font **fontp, char *path, int index);
fz_font *fz_keepfont(fz_font *font);
void fz_dropfont(fz_font *font);
void fz_debugfont(fz_font *font);
void fz_setfontbbox(fz_font *font, float xmin, float ymin, float xmax, float ymax);
/*
* Vector path buffer.
* It can be stroked and dashed, or be filled.
* It has a fill rule (nonzero or evenodd).
*
* When rendering, they are flattened, stroked and dashed straight
* into the Global Edge List.
*/
typedef struct fz_path_s fz_path;
typedef struct fz_strokestate_s fz_strokestate;
typedef union fz_pathel_s fz_pathel;
typedef enum fz_pathelkind_e
{
FZ_MOVETO,
FZ_LINETO,
FZ_CURVETO,
FZ_CLOSEPATH
} fz_pathelkind;
union fz_pathel_s
{
fz_pathelkind k;
float v;
};
struct fz_path_s
{
int len, cap;
fz_pathel *els;
};
struct fz_strokestate_s
{
int linecap;
int linejoin;
float linewidth;
float miterlimit;
float dashphase;
int dashlen;
float dashlist[32];
};
fz_path *fz_newpath(void);
void fz_moveto(fz_path*, float x, float y);
void fz_lineto(fz_path*, float x, float y);
void fz_curveto(fz_path*, float, float, float, float, float, float);
void fz_curvetov(fz_path*, float, float, float, float);
void fz_curvetoy(fz_path*, float, float, float, float);
void fz_closepath(fz_path*);
void fz_freepath(fz_path *path);
void fz_transformpath(fz_path *path, fz_matrix transform);
fz_path *fz_clonepath(fz_path *old);
fz_rect fz_boundpath(fz_path *path, fz_strokestate *stroke, fz_matrix ctm);
void fz_debugpath(fz_path *, int indent);
/*
* Text buffer.
*
* The trm field contains the a, b, c and d coefficients.
* The e and f coefficients come from the individual elements,
* together they form the transform matrix for the glyph.
*
* Glyphs are referenced by glyph ID.
* The Unicode text equivalent is kept in a separate array
* with indexes into the glyph array.
*/
typedef struct fz_text_s fz_text;
typedef struct fz_textel_s fz_textel;
struct fz_textel_s
{
float x, y;
int gid; /* -1 for one gid to many ucs mappings */
int ucs; /* -1 for one ucs to many gid mappings */
};
struct fz_text_s
{
fz_font *font;
fz_matrix trm;
int wmode;
int len, cap;
fz_textel *els;
};
fz_text *fz_newtext(fz_font *face, fz_matrix trm, int wmode);
void fz_addtext(fz_text *text, int gid, int ucs, float x, float y);
void fz_freetext(fz_text *text);
void fz_debugtext(fz_text*, int indent);
fz_rect fz_boundtext(fz_text *text, fz_matrix ctm);
fz_text *fz_clonetext(fz_text *old);
/*
* The shading code uses gouraud shaded triangle meshes.
*/
enum
{
FZ_LINEAR,
FZ_RADIAL,
FZ_MESH,
};
typedef struct fz_shade_s fz_shade;
struct fz_shade_s
{
int refs;
fz_rect bbox; /* can be fz_infiniterect */
fz_colorspace *cs;
fz_matrix matrix; /* matrix from pattern dict */
int usebackground; /* background color for fills but not 'sh' */
float background[FZ_MAXCOLORS];
int usefunction;
float function[256][FZ_MAXCOLORS + 1];
int type; /* linear, radial, mesh */
int extend[2];
int meshlen;
int meshcap;
float *mesh; /* [x y 0], [x y r], [x y t] or [x y c1 ... cn] */
};
fz_shade *fz_keepshade(fz_shade *shade);
void fz_dropshade(fz_shade *shade);
void fz_debugshade(fz_shade *shade);
fz_rect fz_boundshade(fz_shade *shade, fz_matrix ctm);
void fz_paintshade(fz_shade *shade, fz_matrix ctm, fz_pixmap *dest, fz_bbox bbox);
/*
* Glyph cache
*/
typedef struct fz_glyphcache_s fz_glyphcache;
fz_glyphcache *fz_newglyphcache(void);
fz_pixmap *fz_renderftglyph(fz_font *font, int cid, fz_matrix trm);
fz_pixmap *fz_rendert3glyph(fz_font *font, int cid, fz_matrix trm);
fz_pixmap *fz_renderftstrokedglyph(fz_font *font, int gid, fz_matrix trm, fz_matrix ctm, fz_strokestate *state);
fz_pixmap *fz_renderglyph(fz_glyphcache*, fz_font*, int, fz_matrix);
fz_pixmap *fz_renderstrokedglyph(fz_glyphcache*, fz_font*, int, fz_matrix, fz_matrix, fz_strokestate *stroke);
void fz_freeglyphcache(fz_glyphcache *);
/*
* Scan converter
*/
typedef struct fz_edge_s fz_edge;
typedef struct fz_gel_s fz_gel;
typedef struct fz_ael_s fz_ael;
struct fz_edge_s
{
int x, e, h, y;
int adjup, adjdown;
int xmove;
int xdir, ydir; /* -1 or +1 */
};
struct fz_gel_s
{
fz_bbox clip;
fz_bbox bbox;
int cap;
int len;
fz_edge *edges;
};
struct fz_ael_s
{
int cap;
int len;
fz_edge **edges;
};
fz_gel *fz_newgel(void);
void fz_insertgel(fz_gel *gel, float x0, float y0, float x1, float y1);
fz_bbox fz_boundgel(fz_gel *gel);
void fz_resetgel(fz_gel *gel, fz_bbox clip);
void fz_sortgel(fz_gel *gel);
void fz_freegel(fz_gel *gel);
int fz_isrectgel(fz_gel *gel);
fz_ael *fz_newael(void);
void fz_freeael(fz_ael *ael);
fz_error fz_scanconvert(fz_gel *gel, fz_ael *ael, int eofill,
fz_bbox clip, fz_pixmap *pix, unsigned char *colorbv);
void fz_fillpath(fz_gel *gel, fz_path *path, fz_matrix ctm, float flatness);
void fz_strokepath(fz_gel *gel, fz_path *path, fz_strokestate *stroke, fz_matrix ctm, float flatness, float linewidth);
void fz_dashpath(fz_gel *gel, fz_path *path, fz_strokestate *stroke, fz_matrix ctm, float flatness, float linewidth);
/*
* The device interface.
*/
enum
{
FZ_IGNOREIMAGE = 1,
FZ_IGNORESHADE = 2,
};
typedef struct fz_device_s fz_device;
struct fz_device_s
{
int hints;
void *user;
void (*freeuser)(void *);
void (*fillpath)(void *, fz_path *, int evenodd, fz_matrix, fz_colorspace *, float *color, float alpha);
void (*strokepath)(void *, fz_path *, fz_strokestate *, fz_matrix, fz_colorspace *, float *color, float alpha);
void (*clippath)(void *, fz_path *, int evenodd, fz_matrix);
void (*clipstrokepath)(void *, fz_path *, fz_strokestate *, fz_matrix);
void (*filltext)(void *, fz_text *, fz_matrix, fz_colorspace *, float *color, float alpha);
void (*stroketext)(void *, fz_text *, fz_strokestate *, fz_matrix, fz_colorspace *, float *color, float alpha);
void (*cliptext)(void *, fz_text *, fz_matrix, int accumulate);
void (*clipstroketext)(void *, fz_text *, fz_strokestate *, fz_matrix);
void (*ignoretext)(void *, fz_text *, fz_matrix);
void (*fillshade)(void *, fz_shade *shd, fz_matrix ctm, float alpha);
void (*fillimage)(void *, fz_pixmap *img, fz_matrix ctm, float alpha);
void (*fillimagemask)(void *, fz_pixmap *img, fz_matrix ctm, fz_colorspace *, float *color, float alpha);
void (*clipimagemask)(void *, fz_pixmap *img, fz_matrix ctm);
void (*popclip)(void *);
void (*beginmask)(void *, fz_rect, int luminosity, fz_colorspace *cs, float *bc);
void (*endmask)(void *);
void (*begingroup)(void *, fz_rect, int isolated, int knockout, fz_blendmode blendmode, float alpha);
void (*endgroup)(void *);
};
fz_device *fz_newdevice(void *user);
void fz_freedevice(fz_device *dev);
fz_device *fz_newtracedevice(void);
fz_device *fz_newbboxdevice(fz_bbox *bboxp);
fz_device *fz_newdrawdevice(fz_glyphcache *cache, fz_pixmap *dest);
/*
* Text extraction device
*/
typedef struct fz_textspan_s fz_textspan;
typedef struct fz_textchar_s fz_textchar;
struct fz_textchar_s
{
int c;
fz_bbox bbox;
};
struct fz_textspan_s
{
fz_font *font;
float size;
int wmode;
int len, cap;
fz_textchar *text;
fz_textspan *next;
int eol;
};
fz_textspan *fz_newtextspan(void);
void fz_freetextspan(fz_textspan *line);
void fz_debugtextspan(fz_textspan *line);
void fz_debugtextspanxml(fz_textspan *span);
fz_device *fz_newtextdevice(fz_textspan *text);
/*
* Display list device -- record and play back device commands.
*/
typedef struct fz_displaylist_s fz_displaylist;
typedef struct fz_displaynode_s fz_displaynode;
typedef enum fz_displaycommand_e
{
FZ_CMDFILLPATH,
FZ_CMDSTROKEPATH,
FZ_CMDCLIPPATH,
FZ_CMDCLIPSTROKEPATH,
FZ_CMDFILLTEXT,
FZ_CMDSTROKETEXT,
FZ_CMDCLIPTEXT,
FZ_CMDCLIPSTROKETEXT,
FZ_CMDIGNORETEXT,
FZ_CMDFILLSHADE,
FZ_CMDFILLIMAGE,
FZ_CMDFILLIMAGEMASK,
FZ_CMDCLIPIMAGEMASK,
FZ_CMDPOPCLIP,
FZ_CMDBEGINMASK,
FZ_CMDENDMASK,
FZ_CMDBEGINGROUP,
FZ_CMDENDGROUP,
} fz_displaycommand;
struct fz_displaynode_s
{
fz_displaycommand cmd;
fz_displaynode *next;
fz_rect rect;
union {
fz_path *path;
fz_text *text;
fz_shade *shade;
fz_pixmap *image;
fz_blendmode blendmode;
} item;
fz_strokestate *stroke;
int flag; /* evenodd, accumulate, isolated/knockout... */
fz_matrix ctm;
fz_colorspace *colorspace;
float alpha;
float color[FZ_MAXCOLORS];
};
struct fz_displaylist_s
{
fz_displaynode *first;
fz_displaynode *last;
};
fz_displaylist *fz_newdisplaylist(void);
void fz_freedisplaylist(fz_displaylist *list);
fz_device *fz_newlistdevice(fz_displaylist *list);
void fz_executedisplaylist(fz_displaylist *list, fz_device *dev, fz_matrix ctm);
/*
* Function pointers for plotting functions.
* They can be replaced by cpu-optimized versions.
*/
/*
These are the blending primitives:
span over span (text and path drawing to clip mask)
span in alpha over span
span in span over span
color in span over span (text and path drawing)
fz_paintspan(dp, sp);
fz_paintspanalpha(dp, sp, alpha)
fz_paintspanmask(dp, sp, mask);
fz_paintspancolor(dp, color, mask);
pixmap over pixmap (shading with function lookup)
pixmap in alpha over pixmap (xobject/shading with ca)
pixmap in pixmap over pixmap (xobject with softmask / clip)
fz_paintpixmap()
fz_paintpixmapalpha()
fz_paintpixmapmask()
affine over span
affine in alpha over span
color in affine over span
fz_paintaffine()
fz_paintaffinealpha()
fz_paintaffinecolor()
image over pixmap (image fill)
image in alpha over pixmap (image fill with ca)
color in image over pixmap (image mask fill)
fz_paintimage()
fz_paintimagealpha()
fz_paintimagecolor()
pixmap BLEND pixmap
pixmap in alpha BLEND pixmap
fz_blendpixmap()
fz_blendpixmapalpha()
*/
void fz_accelerate(void);
void fz_acceleratearch(void);
void fz_decodetile(fz_pixmap *pix, float *decode);
void fz_decodeindexedtile(fz_pixmap *pix, float *decode, int maxval);
void fz_unpacktile(fz_pixmap *dst, unsigned char * restrict src, int n, int depth, int stride, int scale);
void fz_paintspan(unsigned char * restrict dp, unsigned char * restrict sp, int n, int w, int alpha);
void fz_paintspancolor(unsigned char * restrict dp, unsigned char * restrict mp, int n, int w, unsigned char *color);
void fz_paintaffinecolor(unsigned char *dp, unsigned char *sp, int sw, int sh, int u, int v, int fa, int fb, int w, int n, unsigned char *color);
void fz_paintimage(fz_pixmap *dst, fz_bbox scissor, fz_pixmap *img, fz_matrix ctm, int alpha);
void fz_paintimagecolor(fz_pixmap *dst, fz_bbox scissor, fz_pixmap *img, fz_matrix ctm, unsigned char *colorbv);
void fz_paintpixmap(fz_pixmap *dst, fz_pixmap *src, int alpha);
void fz_paintpixmapmask(fz_pixmap *dst, fz_pixmap *src, fz_pixmap *msk);
void fz_blendpixmap(fz_pixmap *dst, fz_pixmap *src, int alpha, fz_blendmode blendmode);
extern void (*fz_srown)(unsigned char *restrict, unsigned char *restrict, int w, int denom, int n);
extern void (*fz_srow1)(unsigned char *restrict, unsigned char *restrict, int w, int denom);
extern void (*fz_srow2)(unsigned char *restrict, unsigned char *restrict, int w, int denom);
extern void (*fz_srow4)(unsigned char *restrict, unsigned char *restrict, int w, int denom);
extern void (*fz_srow5)(unsigned char *restrict, unsigned char *restrict, int w, int denom);
extern void (*fz_scoln)(unsigned char *restrict, unsigned char *restrict, int w, int denom, int n);
extern void (*fz_scol1)(unsigned char *restrict, unsigned char *restrict, int w, int denom);
extern void (*fz_scol2)(unsigned char *restrict, unsigned char *restrict, int w, int denom);
extern void (*fz_scol4)(unsigned char *restrict, unsigned char *restrict, int w, int denom);
extern void (*fz_scol5)(unsigned char *restrict, unsigned char *restrict, int w, int denom);
#endif
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