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| Rev | Author | Line No. | Line |
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| 4349 | Serge | 1 | /* cairo - a vector graphics library with display and print output |
| 2 | * |
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| 3 | * Copyright © 2010 Linaro Limited |
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| 4 | * |
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| 5 | * This library is free software; you can redistribute it and/or |
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| 6 | * modify it either under the terms of the GNU Lesser General Public |
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| 7 | * License version 2.1 as published by the Free Software Foundation |
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| 8 | * (the "LGPL") or, at your option, under the terms of the Mozilla |
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| 9 | * Public License Version 1.1 (the "MPL"). If you do not alter this |
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| 10 | * notice, a recipient may use your version of this file under either |
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| 11 | * the MPL or the LGPL. |
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| 12 | * |
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| 13 | * You should have received a copy of the LGPL along with this library |
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| 14 | * in the file COPYING-LGPL-2.1; if not, write to the Free Software |
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| 15 | * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA |
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| 16 | * You should have received a copy of the MPL along with this library |
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| 17 | * in the file COPYING-MPL-1.1 |
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| 18 | * |
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| 19 | * The contents of this file are subject to the Mozilla Public License |
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| 20 | * Version 1.1 (the "License"); you may not use this file except in |
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| 21 | * compliance with the License. You may obtain a copy of the License at |
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| 22 | * http://www.mozilla.org/MPL/ |
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| 23 | * |
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| 24 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY |
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| 25 | * OF ANY KIND, either express or implied. See the LGPL or the MPL for |
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| 26 | * the specific language governing rights and limitations. |
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| 27 | * |
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| 28 | * Contributor(s): |
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| 29 | * Alexandros Frantzis |
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| 30 | */ |
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| 31 | |||
| 32 | #include "cairoint.h" |
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| 33 | #include "cairo-gl-private.h" |
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| 34 | |||
| 35 | int |
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| 36 | _cairo_gl_get_version (void) |
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| 37 | { |
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| 38 | int major, minor; |
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| 39 | const char *version = (const char *) glGetString (GL_VERSION); |
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| 40 | const char *dot = version == NULL ? NULL : strchr (version, '.'); |
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| 41 | const char *major_start = dot; |
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| 42 | |||
| 43 | /* Sanity check */ |
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| 44 | if (dot == NULL || dot == version || *(dot + 1) == '\0') { |
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| 45 | major = 0; |
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| 46 | minor = 0; |
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| 47 | } else { |
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| 48 | /* Find the start of the major version in the string */ |
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| 49 | while (major_start > version && *major_start != ' ') |
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| 50 | --major_start; |
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| 51 | major = strtol (major_start, NULL, 10); |
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| 52 | minor = strtol (dot + 1, NULL, 10); |
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| 53 | } |
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| 54 | |||
| 55 | return CAIRO_GL_VERSION_ENCODE (major, minor); |
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| 56 | } |
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| 57 | |||
| 58 | cairo_gl_flavor_t |
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| 59 | _cairo_gl_get_flavor (void) |
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| 60 | { |
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| 61 | const char *version = (const char *) glGetString (GL_VERSION); |
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| 62 | cairo_gl_flavor_t flavor; |
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| 63 | |||
| 64 | if (version == NULL) |
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| 65 | flavor = CAIRO_GL_FLAVOR_NONE; |
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| 66 | else if (strstr (version, "OpenGL ES") != NULL) |
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| 67 | flavor = CAIRO_GL_FLAVOR_ES; |
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| 68 | else |
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| 69 | flavor = CAIRO_GL_FLAVOR_DESKTOP; |
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| 70 | |||
| 71 | return flavor; |
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| 72 | } |
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| 73 | |||
| 74 | cairo_bool_t |
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| 75 | _cairo_gl_has_extension (const char *ext) |
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| 76 | { |
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| 77 | const char *extensions = (const char *) glGetString (GL_EXTENSIONS); |
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| 78 | size_t len = strlen (ext); |
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| 79 | const char *ext_ptr = extensions; |
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| 80 | |||
| 81 | if (unlikely (ext_ptr == NULL)) |
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| 82 | return 0; |
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| 83 | |||
| 84 | while ((ext_ptr = strstr (ext_ptr, ext)) != NULL) { |
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| 85 | if (ext_ptr[len] == ' ' || ext_ptr[len] == '\0') |
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| 86 | break; |
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| 87 | ext_ptr += len; |
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| 88 | } |
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| 89 | |||
| 90 | return (ext_ptr != NULL); |
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| 91 | } |