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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 nelem(x) (sizeof(x)/sizeof((x)[0]))
#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) ) )
/*
* 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_throw_imp(__FILE__, __LINE__, __func__, __VA_ARGS__)
#define fz_rethrow(cause, ...) fz_rethrow_imp(__FILE__, __LINE__, __func__, cause, __VA_ARGS__)
#define fz_catch(cause, ...) fz_catch_imp(__FILE__, __LINE__, __func__, cause, __VA_ARGS__)
#elif _MSC_VER >= 1500 /* MSVC 9 or newer */
#define inline __inline
#define restrict __restrict
#define fz_throw(...) fz_throw_imp(__FILE__, __LINE__, __FUNCTION__, __VA_ARGS__)
#define fz_rethrow(cause, ...) fz_rethrow_imp(__FILE__, __LINE__, __FUNCTION__, cause, __VA_ARGS__)
#define fz_catch(cause, ...) fz_catch_imp(__FILE__, __LINE__, __FUNCTION__, cause, __VA_ARGS__)
#elif __GNUC__ >= 3 /* GCC 3 or newer */
#define inline __inline
#define restrict __restrict
#define fz_throw(fmt...) fz_throw_imp(__FILE__, __LINE__, __FUNCTION__, fmt)
#define fz_rethrow(cause, fmt...) fz_rethrow_imp(__FILE__, __LINE__, __FUNCTION__, cause, fmt)
#define fz_catch(cause, fmt...) fz_catch_imp(__FILE__, __LINE__, __FUNCTION__, cause, fmt)
#else /* Unknown or ancient */
#define inline
#define restrict
#define fz_throw fz_throw_impx
#define fz_rethrow fz_rethrow_impx
#define fz_catch fz_catch_impx
#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;
#define fz_okay ((fz_error)0)
void fz_warn(char *fmt, ...) __printflike(1, 2);
void fz_flush_warnings(void);
fz_error fz_throw_imp(const char *file, int line, const char *func, char *fmt, ...) __printflike(4, 5);
fz_error fz_rethrow_imp(const char *file, int line, const char *func, fz_error cause, char *fmt, ...) __printflike(5, 6);
void fz_catch_imp(const char *file, int line, const char *func, fz_error cause, char *fmt, ...) __printflike(5, 6);
fz_error fz_throw_impx(char *fmt, ...) __printflike(1, 2);
fz_error fz_rethrow_impx(fz_error cause, char *fmt, ...) __printflike(2, 3);
void fz_catch_impx(fz_error cause, char *fmt, ...) __printflike(2, 3);
/* extract the last error stack trace */
int fz_get_error_count(void);
char *fz_get_error_line(int n);
/*
* Basic runtime and utility functions
*/
/* 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_is_big_endian(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_hash_table_s fz_hash_table;
fz_hash_table *fz_new_hash_table(int initialsize, int keylen);
void fz_debug_hash(fz_hash_table *table);
void fz_empty_hash(fz_hash_table *table);
void fz_free_hash(fz_hash_table *table);
void *fz_hash_find(fz_hash_table *table, void *key);
void fz_hash_insert(fz_hash_table *table, void *key, void *val);
void fz_hash_remove(fz_hash_table *table, void *key);
int fz_hash_len(fz_hash_table *table);
void *fz_hash_get_key(fz_hash_table *table, int idx);
void *fz_hash_get_val(fz_hash_table *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_unit_rect;
extern const fz_rect fz_empty_rect;
extern const fz_rect fz_infinite_rect;
extern const fz_bbox fz_unit_bbox;
extern const fz_bbox fz_empty_bbox;
extern const fz_bbox fz_infinite_bbox;
#define fz_is_empty_rect(r) ((r).x0 == (r).x1)
#define fz_is_infinite_rect(r) ((r).x0 > (r).x1)
#define fz_is_empty_bbox(b) ((b).x0 == (b).x1)
#define fz_is_infinite_bbox(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_invert_matrix(fz_matrix m);
int fz_is_rectilinear(fz_matrix m);
float fz_matrix_expansion(fz_matrix m);
fz_bbox fz_round_rect(fz_rect r);
fz_bbox fz_intersect_bbox(fz_bbox a, fz_bbox b);
fz_bbox fz_union_bbox(fz_bbox a, fz_bbox b);
fz_point fz_transform_point(fz_matrix m, fz_point p);
fz_point fz_transform_vector(fz_matrix m, fz_point p);
fz_rect fz_transform_rect(fz_matrix m, fz_rect r);
fz_bbox fz_transform_bbox(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_md5_init(fz_md5 *state);
void fz_md5_update(fz_md5 *state, const unsigned char *input, const unsigned inlen);
void fz_md5_final(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_sha256_init(fz_sha256 *state);
void fz_sha256_update(fz_sha256 *state, const unsigned char *input, unsigned int inlen);
void fz_sha256_final(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_arc4_init(fz_arc4 *state, const unsigned char *key, const unsigned len);
void fz_arc4_encrypt(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;
};
extern fz_obj* (*fz_resolve_indirect)(fz_obj*);
fz_obj *fz_new_null(void);
fz_obj *fz_new_bool(int b);
fz_obj *fz_new_int(int i);
fz_obj *fz_new_real(float f);
fz_obj *fz_new_name(char *str);
fz_obj *fz_new_string(char *str, int len);
fz_obj *fz_new_indirect(int num, int gen, void *xref);
fz_obj *fz_new_array(int initialcap);
fz_obj *fz_new_dict(int initialcap);
fz_obj *fz_copy_array(fz_obj *array);
fz_obj *fz_copy_dict(fz_obj *dict);
fz_obj *fz_keep_obj(fz_obj *obj);
void fz_drop_obj(fz_obj *obj);
/* type queries */
int fz_is_null(fz_obj *obj);
int fz_is_bool(fz_obj *obj);
int fz_is_int(fz_obj *obj);
int fz_is_real(fz_obj *obj);
int fz_is_name(fz_obj *obj);
int fz_is_string(fz_obj *obj);
int fz_is_array(fz_obj *obj);
int fz_is_dict(fz_obj *obj);
int fz_is_indirect(fz_obj *obj);
int fz_objcmp(fz_obj *a, fz_obj *b);
/* silent failure, no error reporting */
int fz_to_bool(fz_obj *obj);
int fz_to_int(fz_obj *obj);
float fz_to_real(fz_obj *obj);
char *fz_to_name(fz_obj *obj);
char *fz_to_str_buf(fz_obj *obj);
int fz_to_str_len(fz_obj *obj);
int fz_to_num(fz_obj *obj);
int fz_to_gen(fz_obj *obj);
int fz_array_len(fz_obj *array);
fz_obj *fz_array_get(fz_obj *array, int i);
void fz_array_put(fz_obj *array, int i, fz_obj *obj);
void fz_array_push(fz_obj *array, fz_obj *obj);
void fz_array_drop(fz_obj *array);
void fz_array_insert(fz_obj *array, fz_obj *obj);
int fz_dict_len(fz_obj *dict);
fz_obj *fz_dict_get_key(fz_obj *dict, int idx);
fz_obj *fz_dict_get_val(fz_obj *dict, int idx);
fz_obj *fz_dict_get(fz_obj *dict, fz_obj *key);
fz_obj *fz_dict_gets(fz_obj *dict, char *key);
fz_obj *fz_dict_getsa(fz_obj *dict, char *key, char *abbrev);
void fz_dict_put(fz_obj *dict, fz_obj *key, fz_obj *val);
void fz_dict_puts(fz_obj *dict, char *key, fz_obj *val);
void fz_dict_del(fz_obj *dict, fz_obj *key);
void fz_dict_dels(fz_obj *dict, char *key);
void fz_sort_dict(fz_obj *dict);
int fz_fprint_obj(FILE *fp, fz_obj *obj, int tight);
void fz_debug_obj(fz_obj *obj);
void fz_debug_ref(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_new_buffer(int size);
fz_buffer *fz_keep_buffer(fz_buffer *buf);
void fz_drop_buffer(fz_buffer *buf);
void fz_resize_buffer(fz_buffer *buf, int size);
void fz_grow_buffer(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_open_fd(int file);
fz_stream *fz_open_file(const char *filename);
fz_stream *fz_open_file_w(const wchar_t *filename); /* only on win32 */
fz_stream *fz_open_buffer(fz_buffer *buf);
fz_stream *fz_open_memory(unsigned char *data, int len);
void fz_close(fz_stream *stm);
fz_stream *fz_new_stream(void*, int(*)(fz_stream*, unsigned char*, int), void(*)(fz_stream *));
fz_stream *fz_keep_stream(fz_stream *stm);
void fz_fill_buffer(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_read_line(fz_stream *stm, char *buf, int max);
fz_error fz_read_all(fz_buffer **bufp, fz_stream *stm, int initial);
static inline int fz_read_byte(fz_stream *stm)
{
if (stm->rp == stm->wp)
{
fz_fill_buffer(stm);
return stm->rp < stm->wp ? *stm->rp++ : EOF;
}
return *stm->rp++;
}
static inline int fz_peek_byte(fz_stream *stm)
{
if (stm->rp == stm->wp)
{
fz_fill_buffer(stm);
return stm->rp < stm->wp ? *stm->rp : EOF;
}
return *stm->rp;
}
static inline void fz_unread_byte(fz_stream *stm)
{
if (stm->rp > stm->bp)
stm->rp--;
}
static inline int fz_is_eof(fz_stream *stm)
{
if (stm->rp == stm->wp)
{
if (stm->eof)
return 1;
return fz_peek_byte(stm) == EOF;
}
return 0;
}
static inline unsigned int fz_read_bits(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_read_byte(stm);
n -= 8;
}
if (n > 0)
{
stm->bits = fz_read_byte(stm);
stm->avail = 8 - n;
x = (x << n) | (stm->bits >> stm->avail);
}
}
return x;
}
static inline void fz_sync_bits(fz_stream *stm)
{
stm->avail = 0;
}
static inline int fz_is_eof_bits(fz_stream *stm)
{
return fz_is_eof(stm) && (stm->avail == 0 || stm->bits == EOF);
}
/*
* Data filters.
*/
fz_stream *fz_open_copy(fz_stream *chain);
fz_stream *fz_open_null(fz_stream *chain, int len);
fz_stream *fz_open_arc4(fz_stream *chain, unsigned char *key, unsigned keylen);
fz_stream *fz_open_aesd(fz_stream *chain, unsigned char *key, unsigned keylen);
fz_stream *fz_open_a85d(fz_stream *chain);
fz_stream *fz_open_ahxd(fz_stream *chain);
fz_stream *fz_open_rld(fz_stream *chain);
fz_stream *fz_open_dctd(fz_stream *chain, fz_obj *param);
fz_stream *fz_open_faxd(fz_stream *chain, fz_obj *param);
fz_stream *fz_open_flated(fz_stream *chain);
fz_stream *fz_open_lzwd(fz_stream *chain, fz_obj *param);
fz_stream *fz_open_predict(fz_stream *chain, fz_obj *param);
fz_stream *fz_open_jbig2d(fz_stream *chain, fz_buffer *global);
/*
* Resources and other graphics related objects.
*/
enum { FZ_MAX_COLORS = 32 };
typedef enum fz_blendmode_e
{
/* PDF 1.4 -- standard separable */
FZ_BLEND_NORMAL,
FZ_BLEND_MULTIPLY,
FZ_BLEND_SCREEN,
FZ_BLEND_OVERLAY,
FZ_BLEND_DARKEN,
FZ_BLEND_LIGHTEN,
FZ_BLEND_COLOR_DODGE,
FZ_BLEND_COLOR_BURN,
FZ_BLEND_HARD_LIGHT,
FZ_BLEND_SOFT_LIGHT,
FZ_BLEND_DIFFERENCE,
FZ_BLEND_EXCLUSION,
/* PDF 1.4 -- standard non-separable */
FZ_BLEND_HUE,
FZ_BLEND_SATURATION,
FZ_BLEND_COLOR,
FZ_BLEND_LUMINOSITY,
} fz_blendmode;
extern const char *fz_blendmode_names[];
/*
* 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;
int xres, yres;
fz_colorspace *colorspace;
unsigned char *samples;
int free_samples;
};
/* will return NULL if soft limit is exceeded */
fz_pixmap *fz_new_pixmap_with_limit(fz_colorspace *colorspace, int w, int h);
fz_pixmap *fz_new_pixmap_with_data(fz_colorspace *colorspace, int w, int h, unsigned char *samples);
fz_pixmap *fz_new_pixmap_with_rect(fz_colorspace *, fz_bbox bbox);
fz_pixmap *fz_new_pixmap(fz_colorspace *, int w, int h);
fz_pixmap *fz_keep_pixmap(fz_pixmap *pix);
void fz_drop_pixmap(fz_pixmap *pix);
void fz_clear_pixmap(fz_pixmap *pix);
void fz_clear_pixmap_with_color(fz_pixmap *pix, int value);
void fz_premultiply_pixmap(fz_pixmap *pix);
fz_pixmap *fz_alpha_from_gray(fz_pixmap *gray, int luminosity);
fz_bbox fz_bound_pixmap(fz_pixmap *pix);
fz_pixmap *fz_scale_pixmap(fz_pixmap *src, float x, float y, float w, float h);
fz_error fz_write_pnm(fz_pixmap *pixmap, char *filename);
fz_error fz_write_pam(fz_pixmap *pixmap, char *filename, int savealpha);
fz_error fz_write_png(fz_pixmap *pixmap, char *filename, int savealpha);
fz_error fz_load_jpx_image(fz_pixmap **imgp, unsigned char *data, int size, fz_colorspace *dcs);
/*
* Bitmaps have 1 component per bit. Only used for creating halftoned versions
* of contone buffers, and saving out. Samples are stored msb first, akin to
* pbms.
*/
typedef struct fz_bitmap_s fz_bitmap;
struct fz_bitmap_s
{
int refs;
int w, h, stride, n;
unsigned char *samples;
};
fz_bitmap *fz_new_bitmap(int w, int h, int n);
fz_bitmap *fz_keep_bitmap(fz_bitmap *bit);
void fz_clear_bitmap(fz_bitmap *bit);
void fz_drop_bitmap(fz_bitmap *bit);
fz_error fz_write_pbm(fz_bitmap *bitmap, char *filename);
/*
* A halftone is a set of threshold tiles, one per component. Each threshold
* tile is a pixmap, possibly of varying sizes and phases.
*/
typedef struct fz_halftone_s fz_halftone;
struct fz_halftone_s
{
int refs;
int n;
fz_pixmap *comp[1];
};
fz_halftone *fz_new_halftone(int num_comps);
fz_halftone *fz_get_default_halftone(int num_comps);
fz_halftone *fz_keep_halftone(fz_halftone *half);
void fz_drop_halftone(fz_halftone *half);
fz_bitmap *fz_halftone_pixmap(fz_pixmap *pix, fz_halftone *ht);
/*
* Colorspace resources.
*/
extern fz_colorspace *fz_device_gray;
extern fz_colorspace *fz_device_rgb;
extern fz_colorspace *fz_device_bgr;
extern fz_colorspace *fz_device_cmyk;
struct fz_colorspace_s
{
int refs;
char name[16];
int n;
void (*to_rgb)(fz_colorspace *, float *src, float *rgb);
void (*from_rgb)(fz_colorspace *, float *rgb, float *dst);
void (*free_data)(fz_colorspace *);
void *data;
};
fz_colorspace *fz_new_colorspace(char *name, int n);
fz_colorspace *fz_keep_colorspace(fz_colorspace *colorspace);
void fz_drop_colorspace(fz_colorspace *colorspace);
void fz_convert_color(fz_colorspace *srcs, float *srcv, fz_colorspace *dsts, float *dstv);
void fz_convert_pixmap(fz_pixmap *src, fz_pixmap *dst);
fz_colorspace *fz_find_device_colorspace(char *name);
/*
* 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_error_string(int err);
struct fz_font_s
{
int refs;
char name[32];
void *ft_face; /* has an FT_Face if used */
int ft_substitute; /* ... substitute metrics */
int ft_hint; /* ... force hinting for DynaLab fonts */
/* origin of font data */
char *ft_file;
unsigned char *ft_data;
int ft_size;
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 width_count;
int *width_table;
};
fz_font *fz_new_type3_font(char *name, fz_matrix matrix);
fz_error fz_new_font_from_memory(fz_font **fontp, unsigned char *data, int len, int index);
fz_error fz_new_font_from_file(fz_font **fontp, char *path, int index);
fz_font *fz_keep_font(fz_font *font);
void fz_drop_font(fz_font *font);
void fz_debug_font(fz_font *font);
void fz_set_font_bbox(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 even_odd).
*
* When rendering, they are flattened, stroked and dashed straight
* into the Global Edge List.
*/
typedef struct fz_path_s fz_path;
typedef struct fz_stroke_state_s fz_stroke_state;
typedef union fz_path_item_s fz_path_item;
typedef enum fz_path_item_kind_e
{
FZ_MOVETO,
FZ_LINETO,
FZ_CURVETO,
FZ_CLOSE_PATH
} fz_path_item_kind;
union fz_path_item_s
{
fz_path_item_kind k;
float v;
};
struct fz_path_s
{
int len, cap;
fz_path_item *items;
};
struct fz_stroke_state_s
{
int linecap;
int linejoin;
float linewidth;
float miterlimit;
float dash_phase;
int dash_len;
float dash_list[32];
};
fz_path *fz_new_path(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_free_path(fz_path *path);
void fz_transform_path(fz_path *path, fz_matrix transform);
fz_path *fz_clone_path(fz_path *old);
fz_rect fz_bound_path(fz_path *path, fz_stroke_state *stroke, fz_matrix ctm);
void fz_debug_path(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_text_item_s fz_text_item;
struct fz_text_item_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_text_item *items;
};
fz_text *fz_new_text(fz_font *face, fz_matrix trm, int wmode);
void fz_add_text(fz_text *text, int gid, int ucs, float x, float y);
void fz_free_text(fz_text *text);
void fz_debug_text(fz_text*, int indent);
fz_rect fz_bound_text(fz_text *text, fz_matrix ctm);
fz_text *fz_clone_text(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_infinite_rect */
fz_colorspace *colorspace;
fz_matrix matrix; /* matrix from pattern dict */
int use_background; /* background color for fills but not 'sh' */
float background[FZ_MAX_COLORS];
int use_function;
float function[256][FZ_MAX_COLORS + 1];
int type; /* linear, radial, mesh */
int extend[2];
int mesh_len;
int mesh_cap;
float *mesh; /* [x y 0], [x y r], [x y t] or [x y c1 ... cn] */
};
fz_shade *fz_keep_shade(fz_shade *shade);
void fz_drop_shade(fz_shade *shade);
void fz_debug_shade(fz_shade *shade);
fz_rect fz_bound_shade(fz_shade *shade, fz_matrix ctm);
void fz_paint_shade(fz_shade *shade, fz_matrix ctm, fz_pixmap *dest, fz_bbox bbox);
/*
* Glyph cache
*/
typedef struct fz_glyph_cache_s fz_glyph_cache;
fz_glyph_cache *fz_new_glyph_cache(void);
fz_pixmap *fz_render_ft_glyph(fz_font *font, int cid, fz_matrix trm);
fz_pixmap *fz_render_t3_glyph(fz_font *font, int cid, fz_matrix trm);
fz_pixmap *fz_render_ft_stroked_glyph(fz_font *font, int gid, fz_matrix trm, fz_matrix ctm, fz_stroke_state *state);
fz_pixmap *fz_render_glyph(fz_glyph_cache*, fz_font*, int, fz_matrix);
fz_pixmap *fz_render_stroked_glyph(fz_glyph_cache*, fz_font*, int, fz_matrix, fz_matrix, fz_stroke_state *stroke);
void fz_free_glyph_cache(fz_glyph_cache *);
/*
* Scan converter
*/
int fz_get_aa_level(void);
void fz_set_aa_level(int bits);
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 adj_up, adj_down;
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_new_gel(void);
void fz_insert_gel(fz_gel *gel, float x0, float y0, float x1, float y1);
fz_bbox fz_bound_gel(fz_gel *gel);
void fz_reset_gel(fz_gel *gel, fz_bbox clip);
void fz_sort_gel(fz_gel *gel);
void fz_free_gel(fz_gel *gel);
int fz_is_rect_gel(fz_gel *gel);
fz_ael *fz_new_ael(void);
void fz_free_ael(fz_ael *ael);
void fz_scan_convert(fz_gel *gel, fz_ael *ael, int eofill,
fz_bbox clip, fz_pixmap *pix, unsigned char *colorbv);
void fz_flatten_fill_path(fz_gel *gel, fz_path *path, fz_matrix ctm, float flatness);
void fz_flatten_stroke_path(fz_gel *gel, fz_path *path, fz_stroke_state *stroke, fz_matrix ctm, float flatness, float linewidth);
void fz_flatten_dash_path(fz_gel *gel, fz_path *path, fz_stroke_state *stroke, fz_matrix ctm, float flatness, float linewidth);
/*
* The device interface.
*/
enum
{
FZ_IGNORE_IMAGE = 1,
FZ_IGNORE_SHADE = 2,
};
typedef struct fz_device_s fz_device;
struct fz_device_s
{
int hints;
void *user;
void (*free_user)(void *);
void (*fill_path)(void *, fz_path *, int even_odd, fz_matrix, fz_colorspace *, float *color, float alpha);
void (*stroke_path)(void *, fz_path *, fz_stroke_state *, fz_matrix, fz_colorspace *, float *color, float alpha);
void (*clip_path)(void *, fz_path *, int even_odd, fz_matrix);
void (*clip_stroke_path)(void *, fz_path *, fz_stroke_state *, fz_matrix);
void (*fill_text)(void *, fz_text *, fz_matrix, fz_colorspace *, float *color, float alpha);
void (*stroke_text)(void *, fz_text *, fz_stroke_state *, fz_matrix, fz_colorspace *, float *color, float alpha);
void (*clip_text)(void *, fz_text *, fz_matrix, int accumulate);
void (*clip_stroke_text)(void *, fz_text *, fz_stroke_state *, fz_matrix);
void (*ignore_text)(void *, fz_text *, fz_matrix);
void (*fill_shade)(void *, fz_shade *shd, fz_matrix ctm, float alpha);
void (*fill_image)(void *, fz_pixmap *img, fz_matrix ctm, float alpha);
void (*fill_image_mask)(void *, fz_pixmap *img, fz_matrix ctm, fz_colorspace *, float *color, float alpha);
void (*clip_image_mask)(void *, fz_pixmap *img, fz_matrix ctm);
void (*pop_clip)(void *);
void (*begin_mask)(void *, fz_rect, int luminosity, fz_colorspace *, float *bc);
void (*end_mask)(void *);
void (*begin_group)(void *, fz_rect, int isolated, int knockout, fz_blendmode blendmode, float alpha);
void (*end_group)(void *);
void (*begin_tile)(void *, fz_rect area, fz_rect view, float xstep, float ystep, fz_matrix ctm);
void (*end_tile)(void *);
};
void fz_fill_path(fz_device *dev, fz_path *path, int even_odd, fz_matrix ctm, fz_colorspace *colorspace, float *color, float alpha);
void fz_stroke_path(fz_device *dev, fz_path *path, fz_stroke_state *stroke, fz_matrix ctm, fz_colorspace *colorspace, float *color, float alpha);
void fz_clip_path(fz_device *dev, fz_path *path, int even_odd, fz_matrix ctm);
void fz_clip_stroke_path(fz_device *dev, fz_path *path, fz_stroke_state *stroke, fz_matrix ctm);
void fz_fill_text(fz_device *dev, fz_text *text, fz_matrix ctm, fz_colorspace *colorspace, float *color, float alpha);
void fz_stroke_text(fz_device *dev, fz_text *text, fz_stroke_state *stroke, fz_matrix ctm, fz_colorspace *colorspace, float *color, float alpha);
void fz_clip_text(fz_device *dev, fz_text *text, fz_matrix ctm, int accumulate);
void fz_clip_stroke_text(fz_device *dev, fz_text *text, fz_stroke_state *stroke, fz_matrix ctm);
void fz_ignore_text(fz_device *dev, fz_text *text, fz_matrix ctm);
void fz_pop_clip(fz_device *dev);
void fz_fill_shade(fz_device *dev, fz_shade *shade, fz_matrix ctm, float alpha);
void fz_fill_image(fz_device *dev, fz_pixmap *image, fz_matrix ctm, float alpha);
void fz_fill_image_mask(fz_device *dev, fz_pixmap *image, fz_matrix ctm, fz_colorspace *colorspace, float *color, float alpha);
void fz_clip_image_mask(fz_device *dev, fz_pixmap *image, fz_matrix ctm);
void fz_begin_mask(fz_device *dev, fz_rect area, int luminosity, fz_colorspace *colorspace, float *bc);
void fz_end_mask(fz_device *dev);
void fz_begin_group(fz_device *dev, fz_rect area, int isolated, int knockout, fz_blendmode blendmode, float alpha);
void fz_end_group(fz_device *dev);
void fz_begin_tile(fz_device *dev, fz_rect area, fz_rect view, float xstep, float ystep, fz_matrix ctm);
void fz_end_tile(fz_device *dev);
fz_device *fz_new_device(void *user);
void fz_free_device(fz_device *dev);
fz_device *fz_new_trace_device(void);
fz_device *fz_new_bbox_device(fz_bbox *bboxp);
fz_device *fz_new_draw_device(fz_glyph_cache *cache, fz_pixmap *dest);
/*
* Text extraction device
*/
typedef struct fz_text_span_s fz_text_span;
typedef struct fz_text_char_s fz_text_char;
struct fz_text_char_s
{
int c;
fz_bbox bbox;
};
struct fz_text_span_s
{
fz_font *font;
float size;
int wmode;
int len, cap;
fz_text_char *text;
fz_text_span *next;
int eol;
};
fz_text_span *fz_new_text_span(void);
void fz_free_text_span(fz_text_span *line);
void fz_debug_text_span(fz_text_span *line);
void fz_debug_text_span_xml(fz_text_span *span);
fz_device *fz_new_text_device(fz_text_span *text);
/*
* Display list device -- record and play back device commands.
*/
typedef struct fz_display_list_s fz_display_list;
typedef struct fz_display_node_s fz_display_node;
typedef enum fz_display_command_e
{
FZ_CMD_FILL_PATH,
FZ_CMD_STROKE_PATH,
FZ_CMD_CLIP_PATH,
FZ_CMD_CLIP_STROKE_PATH,
FZ_CMD_FILL_TEXT,
FZ_CMD_STROKE_TEXT,
FZ_CMD_CLIP_TEXT,
FZ_CMD_CLIP_STROKE_TEXT,
FZ_CMD_IGNORE_TEXT,
FZ_CMD_FILL_SHADE,
FZ_CMD_FILL_IMAGE,
FZ_CMD_FILL_IMAGE_MASK,
FZ_CMD_CLIP_IMAGE_MASK,
FZ_CMD_POP_CLIP,
FZ_CMD_BEGIN_MASK,
FZ_CMD_END_MASK,
FZ_CMD_BEGIN_GROUP,
FZ_CMD_END_GROUP,
FZ_CMD_BEGIN_TILE,
FZ_CMD_END_TILE
} fz_display_command;
struct fz_display_node_s
{
fz_display_command cmd;
fz_display_node *next;
fz_rect rect;
union {
fz_path *path;
fz_text *text;
fz_shade *shade;
fz_pixmap *image;
fz_blendmode blendmode;
} item;
fz_stroke_state *stroke;
int flag; /* even_odd, accumulate, isolated/knockout... */
fz_matrix ctm;
fz_colorspace *colorspace;
float alpha;
float color[FZ_MAX_COLORS];
};
struct fz_display_list_s
{
fz_display_node *first;
fz_display_node *last;
};
fz_display_list *fz_new_display_list(void);
void fz_free_display_list(fz_display_list *list);
fz_device *fz_new_list_device(fz_display_list *list);
void fz_execute_display_list(fz_display_list *list, fz_device *dev, fz_matrix ctm, fz_bbox area);
/*
* Plotting functions.
*/
void fz_accelerate(void);
void fz_accelerate_arch(void);
void fz_decode_tile(fz_pixmap *pix, float *decode);
void fz_decode_indexed_tile(fz_pixmap *pix, float *decode, int maxval);
void fz_unpack_tile(fz_pixmap *dst, unsigned char * restrict src, int n, int depth, int stride, int scale);
void fz_paint_solid_alpha(unsigned char * restrict dp, int w, int alpha);
void fz_paint_solid_color(unsigned char * restrict dp, int n, int w, unsigned char *color);
void fz_paint_span(unsigned char * restrict dp, unsigned char * restrict sp, int n, int w, int alpha);
void fz_paint_span_with_color(unsigned char * restrict dp, unsigned char * restrict mp, int n, int w, unsigned char *color);
void fz_paint_image(fz_pixmap *dst, fz_bbox scissor, fz_pixmap *img, fz_matrix ctm, int alpha);
void fz_paint_image_with_color(fz_pixmap *dst, fz_bbox scissor, fz_pixmap *img, fz_matrix ctm, unsigned char *colorbv);
void fz_paint_pixmap(fz_pixmap *dst, fz_pixmap *src, int alpha);
void fz_paint_pixmap_with_mask(fz_pixmap *dst, fz_pixmap *src, fz_pixmap *msk);
void fz_paint_pixmap_with_rect(fz_pixmap *dst, fz_pixmap *src, int alpha, fz_bbox bbox);
void fz_blend_pixmap(fz_pixmap *dst, fz_pixmap *src, int alpha, fz_blendmode blendmode);
#endif
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