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/*
* Resources and other graphics related objects.
*/
typedef struct fz_pixmap_s fz_pixmap;
typedef struct fz_colorspace_s fz_colorspace;
typedef struct fz_path_s fz_path;
typedef struct fz_text_s fz_text;
typedef struct fz_font_s fz_font;
typedef struct fz_shade_s fz_shade;
typedef struct fz_glyphcache_s fz_glyphcache;
typedef struct fz_strokestate_s fz_strokestate;
enum { FZ_MAXCOLORS = 32 };
typedef enum fz_blendkind_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_blendkind;
/*
pixmaps have n components per pixel. the last is always alpha.
premultiplied alpha when rendering, but non-premultiplied for colorspace
conversions and rescaling.
*/
extern fz_colorspace *pdf_devicegray;
extern fz_colorspace *pdf_devicergb;
extern fz_colorspace *pdf_devicebgr;
extern fz_colorspace *pdf_devicecmyk;
extern fz_colorspace *pdf_devicelab;
extern fz_colorspace *pdf_devicepattern;
struct fz_pixmap_s
{
int refs;
int x, y, w, h, n;
fz_colorspace *colorspace;
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 *map);
void fz_droppixmap(fz_pixmap *map);
void fz_debugpixmap(fz_pixmap *map, char *prefix);
void fz_clearpixmap(fz_pixmap *map, unsigned char value);
fz_pixmap * fz_scalepixmap(fz_pixmap *src, int xdenom, int ydenom);
/*
* 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);
void (*fillimage)(void *, fz_pixmap *img, fz_matrix ctm);
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 *);
};
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_displaycommand;
struct fz_displaylist_s
{
fz_displaynode *first;
fz_displaynode *last;
};
struct fz_displaynode_s
{
fz_displaycommand cmd;
fz_displaynode *next;
union {
fz_path *path;
fz_text *text;
fz_shade *shade;
fz_pixmap *image;
} item;
fz_strokestate *stroke;
int flag; /* evenodd, accumulate, ... */
fz_matrix ctm;
fz_colorspace *colorspace;
float alpha;
float color[FZ_MAXCOLORS];
};
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);
/*
* 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 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_strokestate_s
{
int linecap;
int linejoin;
float linewidth;
float miterlimit;
float dashphase;
int dashlen;
float dashlist[32];
};
struct fz_path_s
{
int len, cap;
fz_pathel *els;
};
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);
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_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_endtext(fz_text *text);
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);
/*
* Colorspace resources.
*
* TODO: use lcms
*/
struct fz_colorspace_s
{
int refs;
char name[16];
int n;
void (*convpixmap)(fz_colorspace *ss, fz_pixmap *sp, fz_colorspace *ds, fz_pixmap *dp);
void (*convcolor)(fz_colorspace *ss, float *sv, fz_colorspace *ds, float *dv);
void (*toxyz)(fz_colorspace *, float *src, float *xyz);
void (*fromxyz)(fz_colorspace *, float *xyz, float *dst);
void (*freefunc)(fz_colorspace *);
};
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_colorspace *srcs, fz_pixmap *srcv, fz_colorspace *dsts, fz_pixmap *dstv);
void fz_stdconvcolor(fz_colorspace *srcs, float *srcv, fz_colorspace *dsts, float *dstv);
void fz_stdconvpixmap(fz_colorspace *srcs, fz_pixmap *srcv, fz_colorspace *dsts, fz_pixmap *dstv);
/*
* Fonts.
*
* Fonts come in three variants:
* Regular fonts are handled by FreeType.
* Type 3 fonts have callbacks to the interpreter.
* Substitute fonts are a thin wrapper over a regular font that adjusts metrics.
*/
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 */
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 (*t3runcontentstream)(fz_device *dev, fz_matrix ctm,
struct pdf_xref_s *xref, fz_obj *resources, fz_buffer *contents);
fz_rect bbox;
/* substitute metrics */
int widthcount;
int *widthtable;
};
fz_error fz_newfreetypefont(fz_font **fontp, char *name, int substitute);
fz_error fz_loadfreetypefontfile(fz_font *font, char *path, int index);
fz_error fz_loadfreetypefontbuffer(fz_font *font, unsigned char *data, int len, int index);
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);
/*
* The shading code is in rough shape but the general architecture is sound.
*/
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];
int meshlen;
int meshcap;
float *mesh; /* [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_rendershade(fz_shade *shade, fz_matrix ctm, fz_pixmap *dst, fz_bbox bbox);
/*
* Glyph cache
*/
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_renderglyph(fz_glyphcache*, fz_font*, int, fz_matrix);
void fz_evictglyphcache(fz_glyphcache *);
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, fz_pixmap *image, fz_matrix *invmat);
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);
/*
* Macros used to do blending
*/
/* 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)
/* 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)
/*
* Function pointers -- they can be replaced by cpu-optimized versions
*/
extern void fz_accelerate(void);
extern void fz_acceleratearch(void);
extern void (*fz_duff_ni1on)(unsigned char*,int,int,unsigned char*,int,unsigned char*,int,int,int);
extern void (*fz_duff_1i1o1)(unsigned char*,int,unsigned char*,int,unsigned char*,int,int,int);
extern void (*fz_duff_2i1o2)(unsigned char*,int,unsigned char*,int,unsigned char*,int,int,int);
extern void (*fz_duff_4i1o4)(unsigned char*,int,unsigned char*,int,unsigned char*,int,int,int);
extern void (*fz_path_1o1)(unsigned char*,unsigned char,int,unsigned char*);
extern void (*fz_path_w2i1o2)(unsigned char*,unsigned char*,unsigned char,int,unsigned char*);
extern void (*fz_path_w4i1o4)(unsigned char*,unsigned char*,unsigned char,int,unsigned char*);
extern void (*fz_text_1o1)(unsigned char*,int,unsigned char*,int,int,int);
extern void (*fz_text_w2i1o2)(unsigned char*,unsigned char*,int,unsigned char*,int,int,int);
extern void (*fz_text_w4i1o4)(unsigned char*,unsigned char*,int,unsigned char*,int,int,int);
extern void (*fz_img_non)(unsigned char*,unsigned char,int,unsigned char*,fz_pixmap*,fz_matrix*);
extern void (*fz_img_1o1)(unsigned char*,unsigned char,int,unsigned char*,fz_pixmap*,int u, int v, int fa, int fb);
extern void (*fz_img_4o4)(unsigned char*,unsigned char,int,unsigned char*,fz_pixmap*,int u, int v, int fa, int fb);
extern void (*fz_img_2o2)(unsigned char*,unsigned char,int,unsigned char*,fz_pixmap*,int u, int v, int fa, int fb);
extern void (*fz_img_w2i1o2)(unsigned char*,unsigned char*,unsigned char,int,unsigned char*,fz_pixmap*,int u, int v, int fa, int fb);
extern void (*fz_img_w4i1o4)(unsigned char*,unsigned char*,unsigned char,int,unsigned char*,fz_pixmap*,int u, int v, int fa, int fb);
extern void (*fz_decodetile)(fz_pixmap *pix, int skip, float *decode);
extern void (*fz_loadtile1)(unsigned char*, int sw, unsigned char*, int dw, int w, int h, int pad);
extern void (*fz_loadtile2)(unsigned char*, int sw, unsigned char*, int dw, int w, int h, int pad);
extern void (*fz_loadtile4)(unsigned char*, int sw, unsigned char*, int dw, int w, int h, int pad);
extern void (*fz_loadtile8)(unsigned char*, int sw, unsigned char*, int dw, int w, int h, int pad);
extern void (*fz_loadtile16)(unsigned char*, int sw, unsigned char*, int dw, int w, int h, int pad);
extern void (*fz_srown)(unsigned char *src, unsigned char *dst, int w, int denom, int n);
extern void (*fz_srow1)(unsigned char *src, unsigned char *dst, int w, int denom);
extern void (*fz_srow2)(unsigned char *src, unsigned char *dst, int w, int denom);
extern void (*fz_srow4)(unsigned char *src, unsigned char *dst, int w, int denom);
extern void (*fz_srow5)(unsigned char *src, unsigned char *dst, int w, int denom);
extern void (*fz_scoln)(unsigned char *src, unsigned char *dst, int w, int denom, int n);
extern void (*fz_scol1)(unsigned char *src, unsigned char *dst, int w, int denom);
extern void (*fz_scol2)(unsigned char *src, unsigned char *dst, int w, int denom);
extern void (*fz_scol4)(unsigned char *src, unsigned char *dst, int w, int denom);
extern void (*fz_scol5)(unsigned char *src, unsigned char *dst, int w, int denom);
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