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  1. /* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
  2. /* cairo - a vector graphics library with display and print output
  3.  *
  4.  * Copyright © 2004 Red Hat, Inc
  5.  * Copyright © 2006 Red Hat, Inc
  6.  * Copyright © 2007 Adrian Johnson
  7.  *
  8.  * This library is free software; you can redistribute it and/or
  9.  * modify it either under the terms of the GNU Lesser General Public
  10.  * License version 2.1 as published by the Free Software Foundation
  11.  * (the "LGPL") or, at your option, under the terms of the Mozilla
  12.  * Public License Version 1.1 (the "MPL"). If you do not alter this
  13.  * notice, a recipient may use your version of this file under either
  14.  * the MPL or the LGPL.
  15.  *
  16.  * You should have received a copy of the LGPL along with this library
  17.  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
  19.  * You should have received a copy of the MPL along with this library
  20.  * in the file COPYING-MPL-1.1
  21.  *
  22.  * The contents of this file are subject to the Mozilla Public License
  23.  * Version 1.1 (the "License"); you may not use this file except in
  24.  * compliance with the License. You may obtain a copy of the License at
  25.  * http://www.mozilla.org/MPL/
  26.  *
  27.  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
  28.  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
  29.  * the specific language governing rights and limitations.
  30.  *
  31.  * The Original Code is the cairo graphics library.
  32.  *
  33.  * The Initial Developer of the Original Code is University of Southern
  34.  * California.
  35.  *
  36.  * Contributor(s):
  37.  *      Kristian Høgsberg <krh@redhat.com>
  38.  *      Carl Worth <cworth@cworth.org>
  39.  *      Adrian Johnson <ajohnson@redneon.com>
  40.  */
  41.  
  42. #ifndef CAIRO_PDF_OPERATORS_H
  43. #define CAIRO_PDF_OPERATORS_H
  44.  
  45. #include "cairo-compiler-private.h"
  46. #include "cairo-error-private.h"
  47. #include "cairo-types-private.h"
  48.  
  49. /* The glyph buffer size is based on the expected maximum glyphs in a
  50.  * line so that an entire line can be emitted in as one string. If the
  51.  * glyphs in a line exceeds this size the only downside is the slight
  52.  * overhead of emitting two strings.
  53.  */
  54. #define PDF_GLYPH_BUFFER_SIZE 200
  55.  
  56. typedef cairo_int_status_t
  57. (*cairo_pdf_operators_use_font_subset_t) (unsigned int  font_id,
  58.                                           unsigned int  subset_id,
  59.                                           void         *closure);
  60.  
  61. typedef struct _cairo_pdf_glyph {
  62.     unsigned int glyph_index;
  63.     double x_position;
  64.     double x_advance;
  65. } cairo_pdf_glyph_t;
  66.  
  67. typedef struct _cairo_pdf_operators {
  68.     cairo_output_stream_t *stream;
  69.     cairo_matrix_t cairo_to_pdf;
  70.     cairo_scaled_font_subsets_t *font_subsets;
  71.     cairo_pdf_operators_use_font_subset_t use_font_subset;
  72.     void *use_font_subset_closure;
  73.     cairo_bool_t use_actual_text;
  74.     cairo_bool_t in_text_object; /* inside BT/ET pair */
  75.  
  76.     /* PDF text state */
  77.     cairo_bool_t is_new_text_object; /* text object started but matrix and font not yet selected */
  78.     unsigned int font_id;
  79.     unsigned int subset_id;
  80.     cairo_matrix_t text_matrix; /* PDF text matrix (Tlm in the PDF reference) */
  81.     cairo_matrix_t cairo_to_pdftext; /* translate cairo coords to PDF text space */
  82.     cairo_matrix_t font_matrix_inverse;
  83.     double cur_x; /* Current position in PDF text space (Tm in the PDF reference) */
  84.     double cur_y;
  85.     int hex_width;
  86.     cairo_bool_t is_latin;
  87.     int num_glyphs;
  88.     double glyph_buf_x_pos;
  89.     cairo_pdf_glyph_t glyphs[PDF_GLYPH_BUFFER_SIZE];
  90.  
  91.     /* PDF line style */
  92.     cairo_bool_t         has_line_style;
  93.     double               line_width;
  94.     cairo_line_cap_t     line_cap;
  95.     cairo_line_join_t    line_join;
  96.     double               miter_limit;
  97.     cairo_bool_t         has_dashes;
  98. } cairo_pdf_operators_t;
  99.  
  100. cairo_private void
  101. _cairo_pdf_operators_init (cairo_pdf_operators_t       *pdf_operators,
  102.                            cairo_output_stream_t       *stream,
  103.                            cairo_matrix_t              *cairo_to_pdf,
  104.                            cairo_scaled_font_subsets_t *font_subsets);
  105.  
  106. cairo_private cairo_status_t
  107. _cairo_pdf_operators_fini (cairo_pdf_operators_t       *pdf_operators);
  108.  
  109. cairo_private void
  110. _cairo_pdf_operators_set_font_subsets_callback (cairo_pdf_operators_t                *pdf_operators,
  111.                                                 cairo_pdf_operators_use_font_subset_t use_font_subset,
  112.                                                 void                                 *closure);
  113.  
  114. cairo_private void
  115. _cairo_pdf_operators_set_stream (cairo_pdf_operators_t   *pdf_operators,
  116.                                  cairo_output_stream_t   *stream);
  117.  
  118.  
  119. cairo_private void
  120. _cairo_pdf_operators_set_cairo_to_pdf_matrix (cairo_pdf_operators_t *pdf_operators,
  121.                                               cairo_matrix_t        *cairo_to_pdf);
  122.  
  123. cairo_private void
  124. _cairo_pdf_operators_enable_actual_text (cairo_pdf_operators_t *pdf_operators,
  125.                                          cairo_bool_t           enable);
  126.  
  127. cairo_private cairo_status_t
  128. _cairo_pdf_operators_flush (cairo_pdf_operators_t        *pdf_operators);
  129.  
  130. cairo_private void
  131. _cairo_pdf_operators_reset (cairo_pdf_operators_t        *pdf_operators);
  132.  
  133. cairo_private cairo_int_status_t
  134. _cairo_pdf_operators_clip (cairo_pdf_operators_t        *pdf_operators,
  135.                            const cairo_path_fixed_t     *path,
  136.                            cairo_fill_rule_t             fill_rule);
  137.  
  138. cairo_private cairo_int_status_t
  139. _cairo_pdf_operators_emit_stroke_style (cairo_pdf_operators_t           *pdf_operators,
  140.                                         const cairo_stroke_style_t      *style,
  141.                                         double                           scale);
  142.  
  143. cairo_private cairo_int_status_t
  144. _cairo_pdf_operators_stroke (cairo_pdf_operators_t      *pdf_operators,
  145.                              const cairo_path_fixed_t   *path,
  146.                              const cairo_stroke_style_t *style,
  147.                              const cairo_matrix_t       *ctm,
  148.                              const cairo_matrix_t       *ctm_inverse);
  149.  
  150. cairo_private cairo_int_status_t
  151. _cairo_pdf_operators_fill (cairo_pdf_operators_t        *pdf_operators,
  152.                            const cairo_path_fixed_t     *path,
  153.                            cairo_fill_rule_t            fill_rule);
  154.  
  155. cairo_private cairo_int_status_t
  156. _cairo_pdf_operators_fill_stroke (cairo_pdf_operators_t         *pdf_operators,
  157.                                   const cairo_path_fixed_t      *path,
  158.                                   cairo_fill_rule_t              fill_rule,
  159.                                   const cairo_stroke_style_t    *style,
  160.                                   const cairo_matrix_t          *ctm,
  161.                                   const cairo_matrix_t          *ctm_inverse);
  162.  
  163. cairo_private cairo_int_status_t
  164. _cairo_pdf_operators_show_text_glyphs (cairo_pdf_operators_t      *pdf_operators,
  165.                                        const char                 *utf8,
  166.                                        int                         utf8_len,
  167.                                        cairo_glyph_t              *glyphs,
  168.                                        int                         num_glyphs,
  169.                                        const cairo_text_cluster_t *clusters,
  170.                                        int                         num_clusters,
  171.                                        cairo_text_cluster_flags_t  cluster_flags,
  172.                                        cairo_scaled_font_t        *scaled_font);
  173.  
  174. #endif /* CAIRO_PDF_OPERATORS_H */
  175.