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

   1 /* cairo - a vector graphics library with display and print output
   2  *
   3  * Copyright © 2009 Eric Anholt
   4  * Copyright © 2009 Chris Wilson
   5  * Copyright © 2005,2010 Red Hat, Inc
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it either under the terms of the GNU Lesser General Public
   9  * License version 2.1 as published by the Free Software Foundation
  10  * (the "LGPL") or, at your option, under the terms of the Mozilla
  11  * Public License Version 1.1 (the "MPL"). If you do not alter this
  12  * notice, a recipient may use your version of this file under either
  13  * the MPL or the LGPL.
  14  *
  15  * You should have received a copy of the LGPL along with this library
  16  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
  18  * You should have received a copy of the MPL along with this library
  19  * in the file COPYING-MPL-1.1
  20  *
  21  * The contents of this file are subject to the Mozilla Public License
  22  * Version 1.1 (the "License"); you may not use this file except in
  23  * compliance with the License. You may obtain a copy of the License at
  24  * http://www.mozilla.org/MPL/
  25  *
  26  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
  27  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
  28  * the specific language governing rights and limitations.
  29  *
  30  * The Original Code is the cairo graphics library.
  31  *
  32  * The Initial Developer of the Original Code is Red Hat, Inc.
  33  *
  34  * Contributor(s):
  35  *      Benjamin Otte <otte@gnome.org>
  36  *      Carl Worth <cworth@cworth.org>
  37  *      Chris Wilson <chris@chris-wilson.co.uk>
  38  *      Eric Anholt <eric@anholt.net>
  39  */
  40
  41 #ifndef CAIRO_GL_GRADIENT_PRIVATE_H
  42 #define CAIRO_GL_GRADIENT_PRIVATE_H
  43
  44 #define GL_GLEXT_PROTOTYPES
  45
  46 #include "cairo-cache-private.h"
  47 #include "cairo-device-private.h"
  48 #include "cairo-reference-count-private.h"
  49 #include "cairo-pattern-private.h"
  50 #include "cairo-types-private.h"
  51
  52 #include "cairo-gl.h"
  53
  54 #if CAIRO_HAS_GL_SURFACE
  55 #include <GL/gl.h>
  56 #include <GL/glext.h>
  57 #elif CAIRO_HAS_GLESV2_SURFACE
  58 #include <GLES2/gl2.h>
  59 #include <GLES2/gl2ext.h>
  60 #endif
  61
  62 #define CAIRO_GL_GRADIENT_CACHE_SIZE 4096
  63
  64 /* XXX: Declare in a better place */
  65 typedef struct _cairo_gl_context cairo_gl_context_t;
  66
  67 typedef struct _cairo_gl_gradient {
  68     cairo_cache_entry_t           cache_entry;
  69     cairo_reference_count_t       ref_count;
  70     cairo_device_t               *device; /* NB: we don't hold a reference */
  71     GLuint                        tex;
  72     unsigned int                  n_stops;
  73     const cairo_gradient_stop_t  *stops;
  74     cairo_gradient_stop_t         stops_embedded[1];
  75 } cairo_gl_gradient_t;
  76
  77 cairo_private cairo_int_status_t
  78 _cairo_gl_gradient_create (cairo_gl_context_t           *ctx,
  79                            unsigned int                  n_stops,
  80                            const cairo_gradient_stop_t  *stops,
  81                            cairo_gl_gradient_t         **gradient_out);
  82
  83 cairo_private_no_warn cairo_gl_gradient_t *
  84 _cairo_gl_gradient_reference (cairo_gl_gradient_t *gradient);
  85
  86 cairo_private void
  87 _cairo_gl_gradient_destroy (cairo_gl_gradient_t *gradient);
  88
  89 cairo_private cairo_bool_t
  90 _cairo_gl_gradient_equal (const void *key_a, const void *key_b);
  91
  92
  93 #endif /* CAIRO_GL_GRADIENT_PRIVATE_H */