| 0,0 → 1,91 |
|---|
| /* cairo - a vector graphics library with display and print output |
| * |
| * Copyright © 2010 Linaro Limited |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it either under the terms of the GNU Lesser General Public |
| * License version 2.1 as published by the Free Software Foundation |
| * (the "LGPL") or, at your option, under the terms of the Mozilla |
| * Public License Version 1.1 (the "MPL"). If you do not alter this |
| * notice, a recipient may use your version of this file under either |
| * the MPL or the LGPL. |
| * |
| * You should have received a copy of the LGPL along with this library |
| * in the file COPYING-LGPL-2.1; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA |
| * You should have received a copy of the MPL along with this library |
| * in the file COPYING-MPL-1.1 |
| * |
| * The contents of this file are subject to the Mozilla Public License |
| * Version 1.1 (the "License"); you may not use this file except in |
| * compliance with the License. You may obtain a copy of the License at |
| * http://www.mozilla.org/MPL/ |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY |
| * OF ANY KIND, either express or implied. See the LGPL or the MPL for |
| * the specific language governing rights and limitations. |
| * |
| * Contributor(s): |
| * Alexandros Frantzis <alexandros.frantzis@linaro.org> |
| */ |
| |
| #include "cairoint.h" |
| #include "cairo-gl-private.h" |
| |
| int |
| _cairo_gl_get_version (void) |
| { |
| int major, minor; |
| const char *version = (const char *) glGetString (GL_VERSION); |
| const char *dot = version == NULL ? NULL : strchr (version, '.'); |
| const char *major_start = dot; |
| |
| /* Sanity check */ |
| if (dot == NULL || dot == version || *(dot + 1) == '\0') { |
| major = 0; |
| minor = 0; |
| } else { |
| /* Find the start of the major version in the string */ |
| while (major_start > version && *major_start != ' ') |
| --major_start; |
| major = strtol (major_start, NULL, 10); |
| minor = strtol (dot + 1, NULL, 10); |
| } |
| |
| return CAIRO_GL_VERSION_ENCODE (major, minor); |
| } |
| |
| cairo_gl_flavor_t |
| _cairo_gl_get_flavor (void) |
| { |
| const char *version = (const char *) glGetString (GL_VERSION); |
| cairo_gl_flavor_t flavor; |
| |
| if (version == NULL) |
| flavor = CAIRO_GL_FLAVOR_NONE; |
| else if (strstr (version, "OpenGL ES") != NULL) |
| flavor = CAIRO_GL_FLAVOR_ES; |
| else |
| flavor = CAIRO_GL_FLAVOR_DESKTOP; |
| |
| return flavor; |
| } |
| |
| cairo_bool_t |
| _cairo_gl_has_extension (const char *ext) |
| { |
| const char *extensions = (const char *) glGetString (GL_EXTENSIONS); |
| size_t len = strlen (ext); |
| const char *ext_ptr = extensions; |
| |
| if (unlikely (ext_ptr == NULL)) |
| return 0; |
| |
| while ((ext_ptr = strstr (ext_ptr, ext)) != NULL) { |
| if (ext_ptr[len] == ' ' || ext_ptr[len] == '\0') |
| break; |
| ext_ptr += len; |
| } |
| |
| return (ext_ptr != NULL); |
| } |