source/libs/cairo/cairo-src/src/cairo-cogl-gradient-private.h

   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 */