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cfd204824f
As a simple step to ensure that we do not inadvertently modify (or at least generate compiler warns if we try) user data, mark the incoming style and matrices as constant.
170 lines
6.2 KiB
C
170 lines
6.2 KiB
C
/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
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/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2004 Red Hat, Inc
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* Copyright © 2006 Red Hat, Inc
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* Copyright © 2007 Adrian Johnson
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*
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* This library is free software; you can redistribute it and/or
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* modify it either under the terms of the GNU Lesser General Public
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* License version 2.1 as published by the Free Software Foundation
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* (the "LGPL") or, at your option, under the terms of the Mozilla
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* Public License Version 1.1 (the "MPL"). If you do not alter this
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* notice, a recipient may use your version of this file under either
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* the MPL or the LGPL.
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*
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* You should have received a copy of the LGPL along with this library
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* in the file COPYING-LGPL-2.1; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* You should have received a copy of the MPL along with this library
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* in the file COPYING-MPL-1.1
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* OF ANY KIND, either express or implied. See the LGPL or the MPL for
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* the specific language governing rights and limitations.
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*
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* The Original Code is the cairo graphics library.
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*
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* The Initial Developer of the Original Code is University of Southern
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* California.
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*
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* Contributor(s):
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* Kristian Høgsberg <krh@redhat.com>
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* Carl Worth <cworth@cworth.org>
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* Adrian Johnson <ajohnson@redneon.com>
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*/
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#ifndef CAIRO_PDF_OPERATORS_H
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#define CAIRO_PDF_OPERATORS_H
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#include "cairo-compiler-private.h"
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#include "cairo-types-private.h"
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/* The glyph buffer size is based on the expected maximum glyphs in a
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* line so that an entire line can be emitted in as one string. If the
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* glyphs in a line exceeds this size the only downside is the slight
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* overhead of emitting two strings.
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*/
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#define PDF_GLYPH_BUFFER_SIZE 200
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typedef cairo_status_t (*cairo_pdf_operators_use_font_subset_t) (unsigned int font_id,
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unsigned int subset_id,
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void *closure);
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typedef struct _cairo_pdf_glyph {
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unsigned int glyph_index;
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double x_position;
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double x_advance;
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} cairo_pdf_glyph_t;
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typedef struct _cairo_pdf_operators {
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cairo_output_stream_t *stream;
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cairo_matrix_t cairo_to_pdf;
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cairo_scaled_font_subsets_t *font_subsets;
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cairo_pdf_operators_use_font_subset_t use_font_subset;
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void *use_font_subset_closure;
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cairo_bool_t use_actual_text;
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cairo_bool_t in_text_object; /* inside BT/ET pair */
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/* PDF text state */
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cairo_bool_t is_new_text_object; /* text object started but matrix and font not yet selected */
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unsigned int font_id;
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unsigned int subset_id;
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cairo_matrix_t text_matrix; /* PDF text matrix (Tlm in the PDF reference) */
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cairo_matrix_t cairo_to_pdftext; /* translate cairo coords to PDF text space */
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cairo_matrix_t font_matrix_inverse;
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double cur_x; /* Current position in PDF text space (Tm in the PDF reference) */
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double cur_y;
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int hex_width;
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int num_glyphs;
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cairo_pdf_glyph_t glyphs[PDF_GLYPH_BUFFER_SIZE];
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/* PDF line style */
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cairo_bool_t has_line_style;
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double line_width;
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cairo_line_cap_t line_cap;
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cairo_line_join_t line_join;
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double miter_limit;
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cairo_bool_t has_dashes;
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} cairo_pdf_operators_t;
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cairo_private void
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_cairo_pdf_operators_init (cairo_pdf_operators_t *pdf_operators,
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cairo_output_stream_t *stream,
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cairo_matrix_t *cairo_to_pdf,
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cairo_scaled_font_subsets_t *font_subsets);
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cairo_private cairo_status_t
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_cairo_pdf_operators_fini (cairo_pdf_operators_t *pdf_operators);
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cairo_private void
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_cairo_pdf_operators_set_font_subsets_callback (cairo_pdf_operators_t *pdf_operators,
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cairo_pdf_operators_use_font_subset_t use_font_subset,
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void *closure);
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cairo_private void
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_cairo_pdf_operators_set_stream (cairo_pdf_operators_t *pdf_operators,
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cairo_output_stream_t *stream);
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cairo_private void
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_cairo_pdf_operators_set_cairo_to_pdf_matrix (cairo_pdf_operators_t *pdf_operators,
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cairo_matrix_t *cairo_to_pdf);
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cairo_private void
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_cairo_pdf_operators_enable_actual_text (cairo_pdf_operators_t *pdf_operators,
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cairo_bool_t enable);
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cairo_private cairo_status_t
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_cairo_pdf_operators_flush (cairo_pdf_operators_t *pdf_operators);
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cairo_private void
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_cairo_pdf_operators_reset (cairo_pdf_operators_t *pdf_operators);
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cairo_private cairo_int_status_t
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_cairo_pdf_operators_clip (cairo_pdf_operators_t *pdf_operators,
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cairo_path_fixed_t *path,
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cairo_fill_rule_t fill_rule);
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cairo_private cairo_int_status_t
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_cairo_pdf_operators_emit_stroke_style (cairo_pdf_operators_t *pdf_operators,
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const cairo_stroke_style_t *style,
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double scale);
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cairo_private cairo_int_status_t
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_cairo_pdf_operators_stroke (cairo_pdf_operators_t *pdf_operators,
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cairo_path_fixed_t *path,
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const cairo_stroke_style_t *style,
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const cairo_matrix_t *ctm,
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const cairo_matrix_t *ctm_inverse);
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cairo_private cairo_int_status_t
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_cairo_pdf_operators_fill (cairo_pdf_operators_t *pdf_operators,
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cairo_path_fixed_t *path,
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cairo_fill_rule_t fill_rule);
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cairo_private cairo_int_status_t
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_cairo_pdf_operators_fill_stroke (cairo_pdf_operators_t *pdf_operators,
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cairo_path_fixed_t *path,
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cairo_fill_rule_t fill_rule,
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const cairo_stroke_style_t *style,
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const cairo_matrix_t *ctm,
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const cairo_matrix_t *ctm_inverse);
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cairo_private cairo_int_status_t
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_cairo_pdf_operators_show_text_glyphs (cairo_pdf_operators_t *pdf_operators,
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const char *utf8,
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int utf8_len,
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cairo_glyph_t *glyphs,
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int num_glyphs,
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const cairo_text_cluster_t *clusters,
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int num_clusters,
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cairo_text_cluster_flags_t cluster_flags,
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cairo_scaled_font_t *scaled_font);
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#endif /* CAIRO_PDF_OPERATORS_H */
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