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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 © 2009 Adrian Johnson
  5.  *
  6.  * This library is free software; you can redistribute it and/or
  7.  * modify it either under the terms of the GNU Lesser General Public
  8.  * License version 2.1 as published by the Free Software Foundation
  9.  * (the "LGPL") or, at your option, under the terms of the Mozilla
  10.  * Public License Version 1.1 (the "MPL"). If you do not alter this
  11.  * notice, a recipient may use your version of this file under either
  12.  * the MPL or the LGPL.
  13.  *
  14.  * You should have received a copy of the LGPL along with this library
  15.  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
  16.  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
  17.  * You should have received a copy of the MPL along with this library
  18.  * in the file COPYING-MPL-1.1
  19.  *
  20.  * The contents of this file are subject to the Mozilla Public License
  21.  * Version 1.1 (the "License"); you may not use this file except in
  22.  * compliance with the License. You may obtain a copy of the License at
  23.  * http://www.mozilla.org/MPL/
  24.  *
  25.  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
  26.  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
  27.  * the specific language governing rights and limitations.
  28.  *
  29.  * The Original Code is the cairo graphics library.
  30.  *
  31.  * The Initial Developer of the Original Code is Adrian Johnson.
  32.  *
  33.  * Contributor(s):
  34.  *      Adrian Johnson <ajohnson@redneon.com>
  35.  */
  36.  
  37. #ifndef CAIRO_PDF_SHADING_H
  38. #define CAIRO_PDF_SHADING_H
  39.  
  40. #include "cairo-compiler-private.h"
  41. #include "cairo-types-private.h"
  42. #include "cairo-pattern-private.h"
  43.  
  44.  
  45. typedef struct _cairo_pdf_shading {
  46.     int shading_type;
  47.     int bits_per_coordinate;
  48.     int bits_per_component;
  49.     int bits_per_flag;
  50.     double *decode_array;
  51.     int decode_array_length;
  52.     unsigned char *data;
  53.     unsigned long data_length;
  54. } cairo_pdf_shading_t;
  55.  
  56.  
  57. /**
  58.  * _cairo_pdf_shading_init_color:
  59.  * @shading: a #cairo_pdf_shading_t to initialize
  60.  * @pattern: the #cairo_mesh_pattern_t to initialize from
  61.  *
  62.  * Generate the PDF shading dictionary data for the a PDF type 7
  63.  * shading from RGB part of the specified mesh pattern.
  64.  *
  65.  * Return value: %CAIRO_STATUS_SUCCESS if successful, possible errors
  66.  * include %CAIRO_STATUS_NO_MEMORY.
  67.  **/
  68. cairo_private cairo_status_t
  69. _cairo_pdf_shading_init_color (cairo_pdf_shading_t        *shading,
  70.                                const cairo_mesh_pattern_t *pattern);
  71.  
  72.  
  73. /**
  74.  * _cairo_pdf_shading_init_alpha:
  75.  * @shading: a #cairo_pdf_shading_t to initialize
  76.  * @pattern: the #cairo_mesh_pattern_t to initialize from
  77.  *
  78.  * Generate the PDF shading dictionary data for a PDF type 7
  79.  * shading from alpha part of the specified mesh pattern.
  80.  *
  81.  * Return value: %CAIRO_STATUS_SUCCESS if successful, possible errors
  82.  * include %CAIRO_STATUS_NO_MEMORY.
  83.  **/
  84. cairo_private cairo_status_t
  85. _cairo_pdf_shading_init_alpha (cairo_pdf_shading_t        *shading,
  86.                                const cairo_mesh_pattern_t *pattern);
  87.  
  88. /**
  89.  * _cairo_pdf_shading_fini:
  90.  * @shading: a #cairo_pdf_shading_t
  91.  *
  92.  * Free all resources associated with @shading.  After this call,
  93.  * @shading should not be used again without a subsequent call to
  94.  * _cairo_pdf_shading_init() again first.
  95.  **/
  96. cairo_private void
  97. _cairo_pdf_shading_fini (cairo_pdf_shading_t *shading);
  98.  
  99.  
  100. #endif /* CAIRO_PDF_SHADING_H */
  101.