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  1. /* cairo - a vector graphics library with display and print output
  2.  *
  3.  * Copyright © 2011 Intel Corporation.
  4.  *
  5.  * This library is free software; you can redistribute it and/or
  6.  * modify it either under the terms of the GNU Lesser General Public
  7.  * License version 2.1 as published by the Free Software Foundation
  8.  * (the "LGPL") or, at your option, under the terms of the Mozilla
  9.  * Public License Version 1.1 (the "MPL"). If you do not alter this
  10.  * notice, a recipient may use your version of this file under either
  11.  * the MPL or the LGPL.
  12.  *
  13.  * You should have received a copy of the LGPL along with this library
  14.  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
  15.  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
  16.  * You should have received a copy of the MPL along with this library
  17.  * in the file COPYING-MPL-1.1
  18.  *
  19.  * The contents of this file are subject to the Mozilla Public License
  20.  * Version 1.1 (the "License"); you may not use this file except in
  21.  * compliance with the License. You may obtain a copy of the License at
  22.  * http://www.mozilla.og/MPL/
  23.  *
  24.  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
  25.  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
  26.  * the specific language governing rights and limitations.
  27.  *
  28.  * Contributor(s):
  29.  *      Robert Bragg <robert@linux.intel.com>
  30.  */
  31.  
  32. #ifndef CAIRO_COGL_GRADIENT_PRIVATE_H
  33. #define CAIRO_COGL_GRADIENT_PRIVATE_H
  34.  
  35. #include "cairoint.h"
  36. #include "cairo-pattern-private.h"
  37.  
  38. #include <cogl/cogl2-experimental.h>
  39.  
  40. #define CAIRO_COGL_LINEAR_GRADIENT_CACHE_SIZE (1024 * 1024)
  41.  
  42. typedef enum _cairo_cogl_gradient_compatibility {
  43.     CAIRO_COGL_GRADIENT_CAN_EXTEND_PAD      = 1<<0,
  44.     CAIRO_COGL_GRADIENT_CAN_EXTEND_REPEAT   = 1<<1,
  45.     CAIRO_COGL_GRADIENT_CAN_EXTEND_REFLECT  = 1<<2,
  46.     CAIRO_COGL_GRADIENT_CAN_EXTEND_NONE     = 1<<3
  47. } cairo_cogl_gradient_compatibility_t;
  48. #define CAIRO_COGL_GRADIENT_CAN_EXTEND_ALL (CAIRO_COGL_GRADIENT_CAN_EXTEND_PAD |\
  49.                                             CAIRO_COGL_GRADIENT_CAN_EXTEND_REPEAT|\
  50.                                             CAIRO_COGL_GRADIENT_CAN_EXTEND_REFLECT|\
  51.                                             CAIRO_COGL_GRADIENT_CAN_EXTEND_NONE)
  52.  
  53. typedef struct _cairo_cogl_linear_texture_entry {
  54.     cairo_cogl_gradient_compatibility_t compatibility;
  55.     CoglTexture *texture;
  56.     float translate_x;
  57.     float scale_x;
  58. } cairo_cogl_linear_texture_entry_t;
  59.  
  60. typedef struct _cairo_cogl_linear_gradient {
  61.     cairo_cache_entry_t          cache_entry;
  62.     cairo_reference_count_t      ref_count;
  63.     GList                       *textures;
  64.     int                          n_stops;
  65.     const cairo_gradient_stop_t *stops;
  66.     cairo_gradient_stop_t        stops_embedded[1];
  67. } cairo_cogl_linear_gradient_t;
  68.  
  69. cairo_int_status_t
  70. _cairo_cogl_get_linear_gradient (cairo_cogl_device_t *context,
  71.                                  cairo_extend_t extend_mode,
  72.                                  int n_stops,
  73.                                  const cairo_gradient_stop_t *stops,
  74.                                  cairo_cogl_linear_gradient_t **gradient_out);
  75.  
  76. cairo_cogl_linear_texture_entry_t *
  77. _cairo_cogl_linear_gradient_texture_for_extend (cairo_cogl_linear_gradient_t *gradient,
  78.                                                 cairo_extend_t extend_mode);
  79.  
  80. cairo_cogl_linear_gradient_t *
  81. _cairo_cogl_linear_gradient_reference (cairo_cogl_linear_gradient_t *gradient);
  82.  
  83. void
  84. _cairo_cogl_linear_gradient_destroy (cairo_cogl_linear_gradient_t *gradient);
  85.  
  86. cairo_bool_t
  87. _cairo_cogl_linear_gradient_equal (const void *key_a, const void *key_b);
  88.  
  89. #endif /* CAIRO_COGL_GRADIENT_PRIVATE_H */
  90.