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/*
* Copyright 2018 Vincent Sanders <vince@netsurf-browser.org>
*
* This file is part of libnspdf.
*
* Licensed under the MIT License,
* http://www.opensource.org/licenses/mit-license.php
*/
/**
* \file
* NetSurf PDF library parsed content stream
*/
#ifndef NSPDF__CONTENT_H_
#define NSPDF__CONTENT_H_
/**
* content operator
*
* parameters types are listed as:
* tag -
* prp - properties
* num - floating point value
*/
enum content_operator {
/**
* close, fill and stroke path with nonzero winding rule.
* b()
*/
CONTENT_OP_b,
/**
* fill and stroke path using nonzero winding rule.
* B()
*/
CONTENT_OP_B,
/**
* close, fill and stroke path with even/odd rule
* b*()
*/
CONTENT_OP_b_,
/**
* fill and stroke path with even/odd rule
* B*()
*/
CONTENT_OP_B_,
/**
* tag prp BDC
* begin marked content sequence with property list
*/
CONTENT_OP_BDC,
/**
* BI()
* begin inline image
*/
CONTENT_OP_BI,
/**
* tag BMC
* begin marked content sequence
*/
CONTENT_OP_BMC,
/**
* begin text
* BT()
*/
CONTENT_OP_BT,
/**
* begin compatability
* BX()
*/
CONTENT_OP_BX,
/**
* append curved segment to path
* c(num x1, num y1, num x2, num y2, num x3, num y3)
*/
CONTENT_OP_c,
CONTENT_OP_cm, /* a b c d e f cm - concatinate matrix to current trasnsform matrix */
CONTENT_OP_CS, /* name CS - set colour space for stroking operations */
CONTENT_OP_cs, /* name cs - set colourspace for non stroke operations */
CONTENT_OP_d, /* array phase d - set line dash pattern */
CONTENT_OP_d0, /* wx wy d0 - set glyph width in type 3 font */
CONTENT_OP_d1, /* wx wy llx lly urx ury d1 - set glyph width and bounding box in type 3 font */
CONTENT_OP_Do, /* name Do - invoke named xobject */
CONTENT_OP_DP, /* tag prp DP - define marked content point with property list */
CONTENT_OP_EI, /* EI - end of inline image */
CONTENT_OP_EMC, /* EMC - end marked content sequence */
CONTENT_OP_ET, /* ET - end text object */
CONTENT_OP_EX, /* EX - end compatability section */
CONTENT_OP_f, /* f - fill path using nonzero winding rule */
CONTENT_OP_F, /* F - fill path using nonzero winding rule */
CONTENT_OP_f_, /* f* - fill path with even/odd rule */
/**
* set gray level for stroking operations
* G(num gray)
*/
CONTENT_OP_G,
/**
* set gray level for nonstroking operations
* g(num gray)
*/
CONTENT_OP_g,
CONTENT_OP_gs, /* dictName gs - set parameters from graphics state directory */
/**
* close subpath
* h()
*/
CONTENT_OP_h,
/**
* set flatness tolerance
* i(num flatness)
*/
CONTENT_OP_i,
CONTENT_OP_ID, /* ID - begin inline image data */
/**
* set line join style (0, 1 or 2)
* j(int linejoin)
*/
CONTENT_OP_j,
CONTENT_OP_J, /* linecap J - sel line cap style (int 0, 1 or 2) */
CONTENT_OP_K, /* c m y k K - set cmyk colour for stroking operations */
CONTENT_OP_k, /* c m y k k - set cmyk colour for nonstroking operations */
CONTENT_OP_l, /* x y l - append straight line segment to path */
CONTENT_OP_m, /* x y m - begin new subpath */
/**
* set mitre limit
* M(num mitrelimit)
*/
CONTENT_OP_M,
CONTENT_OP_MP, /* tag MP - define marked content point */
CONTENT_OP_n, /* n - end path without filling or stroking*/
CONTENT_OP_q, /* q - save graphics state */
CONTENT_OP_Q, /* Q - restore graphics state */
CONTENT_OP_re, /* x y w h re - append rectangle to path */
CONTENT_OP_RG, /* r g b RG - stroke colour in DeviceRGB colourspace */
CONTENT_OP_rg, /* r g b rg - nonstroke colour in DeviceRGB colourspace */
CONTENT_OP_ri, /* intent ri - set color rendering intent */
CONTENT_OP_s, /* s - close and stroke path */
CONTENT_OP_S, /* S - stroke path */
CONTENT_OP_SC, /* c1 c... SC - set colour for stroking operation. 1 3 or 4 params */
CONTENT_OP_sc, /* c1 c... sc - same as SC for nonstroking operations */
CONTENT_OP_SCN, /* c1 c... name SCN - same as SC but extra colour spaces. max 32 params */
CONTENT_OP_scn, /* c1 c... name scn - same as SCN for nonstroking operations */
CONTENT_OP_sh, /* name sh - paint area defined by shading pattern */
CONTENT_OP_T_, /* T* - move to start of next text line */
CONTENT_OP_Tc, /* charspace Tc - set character spacing */
CONTENT_OP_Td, /* tx ty Td - move text position */
CONTENT_OP_TD, /* tx ty TD - move text position and set leading */
CONTENT_OP_Tf, /* font size Tf - select text font and size */
CONTENT_OP_Tj, /* string Tj - show text */
CONTENT_OP_TJ, /* array TJ - show text strings allowing individual positioning */
CONTENT_OP_TL, /* leading TL - set text leading for T* ' " operators */
CONTENT_OP_Tm, /* a b c d e f Tm - set the text matrix */
CONTENT_OP_Tr, /* render Tr - set rendering mode (int) */
CONTENT_OP_Ts, /* rise Ts - set text rise */
CONTENT_OP_Tw, /* wordspace Tw - set word spacing */
CONTENT_OP_Tz, /* scale Tz - set horizontal scaling */
CONTENT_OP_v, /* x2 y2 x3 y3 v - append curved segment path */
/**
* set line width
* w(num linewidth)
*/
CONTENT_OP_w,
CONTENT_OP_W, /* W - set clipping path using nonzero winding rule */
CONTENT_OP_W_, /* W* - set clipping path using odd even rule */
CONTENT_OP_y, /* x1 y1 x3 y3 y - append curved segment to path */
CONTENT_OP__, /* string ' - move to next line and show text */
CONTENT_OP___, /* aw ac string " - set word and char spacing, move to next line and show text */
};
/* six numbers is adequate for almost all operations */
#define content_number_size (6)
/* compute how long the embedded string can be without inflating the
* structure. size of the pointer is used instead of unsigned int as that is
* what will control the structure padding.
*/
#define content_string_intrnl_lngth ((sizeof(float) * content_number_size) - sizeof(uint8_t *))
struct content_operation
{
enum content_operator operator;
union {
float number[content_number_size];
char *name;
int64_t i[3];
struct {
unsigned int length;
union {
char cdata[content_string_intrnl_lngth];
uint8_t *pdata;
} u;
} string;
struct {
unsigned int length;
struct cos_object **values;
} array;
struct {
char *name;
float number;
} namenumber;
} u;
};
#endif
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