227 lines
10 KiB
C
227 lines
10 KiB
C
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#ifndef PDF_INTERPRET_H
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#define PDF_INTERPRET_H
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#include "mupdf/pdf/font.h"
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#include "mupdf/pdf/resource.h"
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typedef struct pdf_csi_s pdf_csi;
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typedef struct pdf_gstate_s pdf_gstate;
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typedef struct pdf_processor_s pdf_processor;
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void *pdf_new_processor(fz_context *ctx, int size);
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void pdf_close_processor(fz_context *ctx, pdf_processor *proc);
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void pdf_drop_processor(fz_context *ctx, pdf_processor *proc);
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struct pdf_processor_s
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{
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void (*close_processor)(fz_context *ctx, pdf_processor *proc);
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void (*drop_processor)(fz_context *ctx, pdf_processor *proc);
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/* general graphics state */
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void (*op_w)(fz_context *ctx, pdf_processor *proc, float linewidth);
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void (*op_j)(fz_context *ctx, pdf_processor *proc, int linejoin);
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void (*op_J)(fz_context *ctx, pdf_processor *proc, int linecap);
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void (*op_M)(fz_context *ctx, pdf_processor *proc, float miterlimit);
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void (*op_d)(fz_context *ctx, pdf_processor *proc, pdf_obj *array, float phase);
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void (*op_ri)(fz_context *ctx, pdf_processor *proc, const char *intent);
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void (*op_i)(fz_context *ctx, pdf_processor *proc, float flatness);
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void (*op_gs_begin)(fz_context *ctx, pdf_processor *proc, const char *name, pdf_obj *extgstate);
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void (*op_gs_BM)(fz_context *ctx, pdf_processor *proc, const char *blendmode);
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void (*op_gs_ca)(fz_context *ctx, pdf_processor *proc, float alpha);
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void (*op_gs_CA)(fz_context *ctx, pdf_processor *proc, float alpha);
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void (*op_gs_SMask)(fz_context *ctx, pdf_processor *proc, pdf_obj *smask, pdf_obj *page_resources, float *bc, int luminosity);
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void (*op_gs_end)(fz_context *ctx, pdf_processor *proc);
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/* special graphics state */
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void (*op_q)(fz_context *ctx, pdf_processor *proc);
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void (*op_Q)(fz_context *ctx, pdf_processor *proc);
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void (*op_cm)(fz_context *ctx, pdf_processor *proc, float a, float b, float c, float d, float e, float f);
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/* path construction */
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void (*op_m)(fz_context *ctx, pdf_processor *proc, float x, float y);
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void (*op_l)(fz_context *ctx, pdf_processor *proc, float x, float y);
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void (*op_c)(fz_context *ctx, pdf_processor *proc, float x1, float y1, float x2, float y2, float x3, float y3);
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void (*op_v)(fz_context *ctx, pdf_processor *proc, float x2, float y2, float x3, float y3);
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void (*op_y)(fz_context *ctx, pdf_processor *proc, float x1, float y1, float x3, float y3);
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void (*op_h)(fz_context *ctx, pdf_processor *proc);
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void (*op_re)(fz_context *ctx, pdf_processor *proc, float x, float y, float w, float h);
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/* path painting */
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void (*op_S)(fz_context *ctx, pdf_processor *proc);
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void (*op_s)(fz_context *ctx, pdf_processor *proc);
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void (*op_F)(fz_context *ctx, pdf_processor *proc);
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void (*op_f)(fz_context *ctx, pdf_processor *proc);
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void (*op_fstar)(fz_context *ctx, pdf_processor *proc);
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void (*op_B)(fz_context *ctx, pdf_processor *proc);
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void (*op_Bstar)(fz_context *ctx, pdf_processor *proc);
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void (*op_b)(fz_context *ctx, pdf_processor *proc);
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void (*op_bstar)(fz_context *ctx, pdf_processor *proc);
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void (*op_n)(fz_context *ctx, pdf_processor *proc);
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/* clipping paths */
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void (*op_W)(fz_context *ctx, pdf_processor *proc);
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void (*op_Wstar)(fz_context *ctx, pdf_processor *proc);
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/* text objects */
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void (*op_BT)(fz_context *ctx, pdf_processor *proc);
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void (*op_ET)(fz_context *ctx, pdf_processor *proc);
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/* text state */
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void (*op_Tc)(fz_context *ctx, pdf_processor *proc, float charspace);
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void (*op_Tw)(fz_context *ctx, pdf_processor *proc, float wordspace);
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void (*op_Tz)(fz_context *ctx, pdf_processor *proc, float scale);
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void (*op_TL)(fz_context *ctx, pdf_processor *proc, float leading);
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void (*op_Tf)(fz_context *ctx, pdf_processor *proc, const char *name, pdf_font_desc *font, float size);
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void (*op_Tr)(fz_context *ctx, pdf_processor *proc, int render);
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void (*op_Ts)(fz_context *ctx, pdf_processor *proc, float rise);
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/* text positioning */
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void (*op_Td)(fz_context *ctx, pdf_processor *proc, float tx, float ty);
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void (*op_TD)(fz_context *ctx, pdf_processor *proc, float tx, float ty);
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void (*op_Tm)(fz_context *ctx, pdf_processor *proc, float a, float b, float c, float d, float e, float f);
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void (*op_Tstar)(fz_context *ctx, pdf_processor *proc);
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/* text showing */
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void (*op_TJ)(fz_context *ctx, pdf_processor *proc, pdf_obj *array);
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void (*op_Tj)(fz_context *ctx, pdf_processor *proc, char *str, int len);
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void (*op_squote)(fz_context *ctx, pdf_processor *proc, char *str, int len);
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void (*op_dquote)(fz_context *ctx, pdf_processor *proc, float aw, float ac, char *str, int len);
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/* type 3 fonts */
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void (*op_d0)(fz_context *ctx, pdf_processor *proc, float wx, float wy);
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void (*op_d1)(fz_context *ctx, pdf_processor *proc, float wx, float wy, float llx, float lly, float urx, float ury);
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/* color */
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void (*op_CS)(fz_context *ctx, pdf_processor *proc, const char *name, fz_colorspace *cs);
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void (*op_cs)(fz_context *ctx, pdf_processor *proc, const char *name, fz_colorspace *cs);
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void (*op_SC_pattern)(fz_context *ctx, pdf_processor *proc, const char *name, pdf_pattern *pat, int n, float *color);
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void (*op_sc_pattern)(fz_context *ctx, pdf_processor *proc, const char *name, pdf_pattern *pat, int n, float *color);
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void (*op_SC_shade)(fz_context *ctx, pdf_processor *proc, const char *name, fz_shade *shade);
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void (*op_sc_shade)(fz_context *ctx, pdf_processor *proc, const char *name, fz_shade *shade);
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void (*op_SC_color)(fz_context *ctx, pdf_processor *proc, int n, float *color);
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void (*op_sc_color)(fz_context *ctx, pdf_processor *proc, int n, float *color);
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void (*op_G)(fz_context *ctx, pdf_processor *proc, float g);
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void (*op_g)(fz_context *ctx, pdf_processor *proc, float g);
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void (*op_RG)(fz_context *ctx, pdf_processor *proc, float r, float g, float b);
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void (*op_rg)(fz_context *ctx, pdf_processor *proc, float r, float g, float b);
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void (*op_K)(fz_context *ctx, pdf_processor *proc, float c, float m, float y, float k);
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void (*op_k)(fz_context *ctx, pdf_processor *proc, float c, float m, float y, float k);
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/* shadings, images, xobjects */
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void (*op_BI)(fz_context *ctx, pdf_processor *proc, fz_image *image, const char *colorspace_name);
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void (*op_sh)(fz_context *ctx, pdf_processor *proc, const char *name, fz_shade *shade);
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void (*op_Do_image)(fz_context *ctx, pdf_processor *proc, const char *name, fz_image *image);
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void (*op_Do_form)(fz_context *ctx, pdf_processor *proc, const char *name, pdf_obj *form, pdf_obj *page_resources);
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/* marked content */
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void (*op_MP)(fz_context *ctx, pdf_processor *proc, const char *tag);
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void (*op_DP)(fz_context *ctx, pdf_processor *proc, const char *tag, pdf_obj *raw, pdf_obj *cooked);
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void (*op_BMC)(fz_context *ctx, pdf_processor *proc, const char *tag);
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void (*op_BDC)(fz_context *ctx, pdf_processor *proc, const char *tag, pdf_obj *raw, pdf_obj *cooked);
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void (*op_EMC)(fz_context *ctx, pdf_processor *proc);
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/* compatibility */
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void (*op_BX)(fz_context *ctx, pdf_processor *proc);
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void (*op_EX)(fz_context *ctx, pdf_processor *proc);
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/* Virtual ops for ExtGState entries */
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void (*op_gs_OP)(fz_context *ctx, pdf_processor *proc, int b);
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void (*op_gs_op)(fz_context *ctx, pdf_processor *proc, int b);
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void (*op_gs_OPM)(fz_context *ctx, pdf_processor *proc, int i);
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void (*op_gs_UseBlackPtComp)(fz_context *ctx, pdf_processor *proc, pdf_obj *name);
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/* END is used to signify end of stream (finalise and close down) */
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void (*op_END)(fz_context *ctx, pdf_processor *proc);
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/* interpreter state that persists across content streams */
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const char *usage;
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int hidden;
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};
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struct pdf_csi_s
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{
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/* input */
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pdf_document *doc;
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pdf_obj *rdb;
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pdf_lexbuf *buf;
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fz_cookie *cookie;
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/* state */
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int gstate;
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int xbalance;
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int in_text;
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fz_rect d1_rect;
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/* stack */
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pdf_obj *obj;
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char name[256];
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char string[256];
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int string_len;
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int top;
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float stack[32];
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};
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/* Functions to set up pdf_process structures */
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pdf_processor *pdf_new_run_processor(fz_context *ctx, fz_device *dev, fz_matrix ctm, const char *usage, pdf_gstate *gstate, fz_default_colorspaces *default_cs, fz_cookie *cookie);
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pdf_processor *pdf_new_buffer_processor(fz_context *ctx, fz_buffer *buffer, int ahxencode);
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pdf_processor *pdf_new_output_processor(fz_context *ctx, fz_output *out, int ahxencode);
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pdf_processor *pdf_new_filter_processor(fz_context *ctx, pdf_document *doc, pdf_processor *chain, pdf_obj *old_res, pdf_obj *new_res);
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typedef int (pdf_text_filter_fn)(fz_context *ctx, void *opaque, int *ucsbuf, int ucslen, fz_matrix trm, fz_matrix ctm, fz_rect bbox);
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typedef void (pdf_after_text_object_fn)(fz_context *ctx, void *opaque, pdf_document *doc, pdf_processor *chain, fz_matrix ctm);
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pdf_processor *
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pdf_new_filter_processor_with_text_filter(fz_context *ctx, pdf_document *doc, int structparents, pdf_processor *chain, pdf_obj *old_rdb, pdf_obj *new_rdb, pdf_text_filter_fn *text_filter, pdf_after_text_object_fn *after, void *text_filter_opaque);
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void pdf_process_contents(fz_context *ctx, pdf_processor *proc, pdf_document *doc, pdf_obj *obj, pdf_obj *res, fz_cookie *cookie);
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void pdf_process_annot(fz_context *ctx, pdf_processor *proc, pdf_document *doc, pdf_page *page, pdf_annot *annot, fz_cookie *cookie);
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void pdf_process_glyph(fz_context *ctx, pdf_processor *proc, pdf_document *doc, pdf_obj *resources, fz_buffer *contents);
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/* Text handling helper functions */
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typedef struct pdf_text_state_s
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{
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float char_space;
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float word_space;
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float scale;
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float leading;
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pdf_font_desc *font;
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float size;
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int render;
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float rise;
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} pdf_text_state;
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typedef struct pdf_text_object_state_s
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{
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fz_text *text;
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fz_rect text_bbox;
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fz_matrix tlm;
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fz_matrix tm;
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int text_mode;
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int cid;
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int gid;
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fz_rect char_bbox;
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pdf_font_desc *fontdesc;
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float char_tx;
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float char_ty;
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} pdf_text_object_state;
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void pdf_tos_save(fz_context *ctx, pdf_text_object_state *tos, fz_matrix save[2]);
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void pdf_tos_restore(fz_context *ctx, pdf_text_object_state *tos, fz_matrix save[2]);
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fz_text *pdf_tos_get_text(fz_context *ctx, pdf_text_object_state *tos);
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void pdf_tos_reset(fz_context *ctx, pdf_text_object_state *tos, int render);
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int pdf_tos_make_trm(fz_context *ctx, pdf_text_object_state *tos, pdf_text_state *text, pdf_font_desc *fontdesc, int cid, fz_matrix *trm);
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void pdf_tos_move_after_char(fz_context *ctx, pdf_text_object_state *tos);
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void pdf_tos_translate(pdf_text_object_state *tos, float tx, float ty);
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void pdf_tos_set_matrix(pdf_text_object_state *tos, float a, float b, float c, float d, float e, float f);
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void pdf_tos_newline(pdf_text_object_state *tos, float leading);
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#endif
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