text: #ifndef PDF_INTERPRET_H
  #define PDF_INTERPRET_H
  
  typedef struct pdf_csi_s pdf_csi;
  typedef struct pdf_gstate_s pdf_gstate;
  typedef struct pdf_processor_s pdf_processor;
  
  void *pdf_new_processor(fz_context *ctx, int size);
  void pdf_close_processor(fz_context *ctx, pdf_processor *proc);
  void pdf_drop_processor(fz_context *ctx, pdf_processor *proc);
  
  struct pdf_processor_s
  {
  	void (*close_processor)(fz_context *ctx, pdf_processor *proc);
  	void (*drop_processor)(fz_context *ctx, pdf_processor *proc);
  
  	/* general graphics state */
  	void (*op_w)(fz_context *ctx, pdf_processor *proc, float linewidth);
  	void (*op_j)(fz_context *ctx, pdf_processor *proc, int linejoin);
  	void (*op_J)(fz_context *ctx, pdf_processor *proc, int linecap);
  	void (*op_M)(fz_context *ctx, pdf_processor *proc, float miterlimit);
  	void (*op_d)(fz_context *ctx, pdf_processor *proc, pdf_obj *array, float phase);
  	void (*op_ri)(fz_context *ctx, pdf_processor *proc, const char *intent);
  	void (*op_i)(fz_context *ctx, pdf_processor *proc, float flatness);
  
  	void (*op_gs_begin)(fz_context *ctx, pdf_processor *proc, const char *name, pdf_obj *extgstate);
  	void (*op_gs_BM)(fz_context *ctx, pdf_processor *proc, const char *blendmode);
  	void (*op_gs_ca)(fz_context *ctx, pdf_processor *proc, float alpha);
  	void (*op_gs_CA)(fz_context *ctx, pdf_processor *proc, float alpha);
  	void (*op_gs_SMask)(fz_context *ctx, pdf_processor *proc, pdf_xobject *smask, pdf_obj *page_resources, float *bc, int luminosity);
  	void (*op_gs_end)(fz_context *ctx, pdf_processor *proc);
  
  	/* special graphics state */
  	void (*op_q)(fz_context *ctx, pdf_processor *proc);
  	void (*op_Q)(fz_context *ctx, pdf_processor *proc);
  	void (*op_cm)(fz_context *ctx, pdf_processor *proc, float a, float b, float c, float d, float e, float f);
  
  	/* path construction */
  	void (*op_m)(fz_context *ctx, pdf_processor *proc, float x, float y);
  	void (*op_l)(fz_context *ctx, pdf_processor *proc, float x, float y);
  	void (*op_c)(fz_context *ctx, pdf_processor *proc, float x1, float y1, float x2, float y2, float x3, float y3);
  	void (*op_v)(fz_context *ctx, pdf_processor *proc, float x2, float y2, float x3, float y3);
  	void (*op_y)(fz_context *ctx, pdf_processor *proc, float x1, float y1, float x3, float y3);
  	void (*op_h)(fz_context *ctx, pdf_processor *proc);
  	void (*op_re)(fz_context *ctx, pdf_processor *proc, float x, float y, float w, float h);
  
  	/* path painting */
  	void (*op_S)(fz_context *ctx, pdf_processor *proc);
  	void (*op_s)(fz_context *ctx, pdf_processor *proc);
  	void (*op_F)(fz_context *ctx, pdf_processor *proc);
  	void (*op_f)(fz_context *ctx, pdf_processor *proc);
  	void (*op_fstar)(fz_context *ctx, pdf_processor *proc);
  	void (*op_B)(fz_context *ctx, pdf_processor *proc);
  	void (*op_Bstar)(fz_context *ctx, pdf_processor *proc);
  	void (*op_b)(fz_context *ctx, pdf_processor *proc);
  	void (*op_bstar)(fz_context *ctx, pdf_processor *proc);
  	void (*op_n)(fz_context *ctx, pdf_processor *proc);
  
  	/* clipping paths */
  	void (*op_W)(fz_context *ctx, pdf_processor *proc);
  	void (*op_Wstar)(fz_context *ctx, pdf_processor *proc);
  
  	/* text objects */
  	void (*op_BT)(fz_context *ctx, pdf_processor *proc);
  	void (*op_ET)(fz_context *ctx, pdf_processor *proc);
  
  	/* text state */
  	void (*op_Tc)(fz_context *ctx, pdf_processor *proc, float charspace);
  	void (*op_Tw)(fz_context *ctx, pdf_processor *proc, float wordspace);
  	void (*op_Tz)(fz_context *ctx, pdf_processor *proc, float scale);
  	void (*op_TL)(fz_context *ctx, pdf_processor *proc, float leading);
  	void (*op_Tf)(fz_context *ctx, pdf_processor *proc, const char *name, pdf_font_desc *font, float size);
  	void (*op_Tr)(fz_context *ctx, pdf_processor *proc, int render);
  	void (*op_Ts)(fz_context *ctx, pdf_processor *proc, float rise);
  
  	/* text positioning */
  	void (*op_Td)(fz_context *ctx, pdf_processor *proc, float tx, float ty);
  	void (*op_TD)(fz_context *ctx, pdf_processor *proc, float tx, float ty);
  	void (*op_Tm)(fz_context *ctx, pdf_processor *proc, float a, float b, float c, float d, float e, float f);
  	void (*op_Tstar)(fz_context *ctx, pdf_processor *proc);
  
  	/* text showing */
  	void (*op_TJ)(fz_context *ctx, pdf_processor *proc, pdf_obj *array);
  	void (*op_Tj)(fz_context *ctx, pdf_processor *proc, char *str, int len);
  	void (*op_squote)(fz_context *ctx, pdf_processor *proc, char *str, int len);
  	void (*op_dquote)(fz_context *ctx, pdf_processor *proc, float aw, float ac, char *str, int len);
  
  	/* type 3 fonts */
  	void (*op_d0)(fz_context *ctx, pdf_processor *proc, float wx, float wy);
  	void (*op_d1)(fz_context *ctx, pdf_processor *proc, float wx, float wy, float llx, float lly, float urx, float ury);
  
  	/* color */
  	void (*op_CS)(fz_context *ctx, pdf_processor *proc, const char *name, fz_colorspace *cs);
  	void (*op_cs)(fz_context *ctx, pdf_processor *proc, const char *name, fz_colorspace *cs);
  	void (*op_SC_pattern)(fz_context *ctx, pdf_processor *proc, const char *name, pdf_pattern *pat, int n, float *color);
  	void (*op_sc_pattern)(fz_context *ctx, pdf_processor *proc, const char *name, pdf_pattern *pat, int n, float *color);
  	void (*op_SC_shade)(fz_context *ctx, pdf_processor *proc, const char *name, fz_shade *shade);
  	void (*op_sc_shade)(fz_context *ctx, pdf_processor *proc, const char *name, fz_shade *shade);
  	void (*op_SC_color)(fz_context *ctx, pdf_processor *proc, int n, float *color);
  	void (*op_sc_color)(fz_context *ctx, pdf_processor *proc, int n, float *color);
  
  	void (*op_G)(fz_context *ctx, pdf_processor *proc, float g);
  	void (*op_g)(fz_context *ctx, pdf_processor *proc, float g);
  	void (*op_RG)(fz_context *ctx, pdf_processor *proc, float r, float g, float b);
  	void (*op_rg)(fz_context *ctx, pdf_processor *proc, float r, float g, float b);
  	void (*op_K)(fz_context *ctx, pdf_processor *proc, float c, float m, float y, float k);
  	void (*op_k)(fz_context *ctx, pdf_processor *proc, float c, float m, float y, float k);
  
  	/* shadings, images, xobjects */
  	void (*op_BI)(fz_context *ctx, pdf_processor *proc, fz_image *image);
  	void (*op_sh)(fz_context *ctx, pdf_processor *proc, const char *name, fz_shade *shade);
  	void (*op_Do_image)(fz_context *ctx, pdf_processor *proc, const char *name, fz_image *image);
  	void (*op_Do_form)(fz_context *ctx, pdf_processor *proc, const char *name, pdf_xobject *form, pdf_obj *page_resources);
  
  	/* marked content */
  	void (*op_MP)(fz_context *ctx, pdf_processor *proc, const char *tag);
  	void (*op_DP)(fz_context *ctx, pdf_processor *proc, const char *tag, pdf_obj *raw, pdf_obj *cooked);
  	void (*op_BMC)(fz_context *ctx, pdf_processor *proc, const char *tag);
  	void (*op_BDC)(fz_context *ctx, pdf_processor *proc, const char *tag, pdf_obj *raw, pdf_obj *cooked);
  	void (*op_EMC)(fz_context *ctx, pdf_processor *proc);
  
  	/* compatibility */
  	void (*op_BX)(fz_context *ctx, pdf_processor *proc);
  	void (*op_EX)(fz_context *ctx, pdf_processor *proc);
  
  	/* END is used to signify end of stream (finalise and close down) */
  	void (*op_END)(fz_context *ctx, pdf_processor *proc);
  
  	/* interpreter state that persists across content streams */
  	const char *usage;
  	int hidden;
  };
  
  struct pdf_csi_s
  {
  	/* input */
  	pdf_document *doc;
  	pdf_obj *rdb;
  	pdf_lexbuf *buf;
  	fz_cookie *cookie;
  
  	/* state */
  	int gstate;
  	int xbalance;
  	int in_text;
  	fz_rect d1_rect;
  
  	/* stack */
  	pdf_obj *obj;
  	char name[256];
  	char string[256];
  	int string_len;
  	int top;
  	float stack[32];
  };
  
  /* Functions to set up pdf_process structures */
  pdf_processor *pdf_new_run_processor(fz_context *ctx, fz_device *dev, const fz_matrix *ctm, const char *usage, pdf_gstate *gstate, int nested);
  pdf_processor *pdf_new_buffer_processor(fz_context *ctx, fz_buffer *buffer, int ahxencode);
  pdf_processor *pdf_new_filter_processor(fz_context *ctx, pdf_processor *chain, pdf_document *doc, pdf_obj *old_res, pdf_obj *new_res);
  
  /* Functions to actually process annotations, glyphs and general stream objects */
  void pdf_process_contents(fz_context *ctx, pdf_processor *proc, pdf_document *doc, pdf_obj *obj, pdf_obj *res, fz_cookie *cookie);
  void pdf_process_annot(fz_context *ctx, pdf_processor *proc, pdf_document *doc, pdf_page *page, pdf_annot *annot, fz_cookie *cookie);
  void pdf_process_glyph(fz_context *ctx, pdf_processor *proc, pdf_document *doc, pdf_obj *resources, fz_buffer *contents);
  
  #endif
  