add cairo

1 files changed, 113 insertions, 0 deletions

diff --git a/libs/cairo-1.16.0/src/cairo-gl-info.c b/libs/cairo-1.16.0/src/cairo-gl-info.c
new file mode 100644
index 0000000..26b7b45
--- /dev/null
+++ b/libs/cairo-1.16.0/src/cairo-gl-info.c
@@ -0,0 +1,113 @@
+/* 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"
+
+#include <errno.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 3") != NULL)
+	flavor = CAIRO_GL_FLAVOR_ES3;
+    else if (strstr (version, "OpenGL ES 2") != NULL)
+	flavor = CAIRO_GL_FLAVOR_ES2;
+    else
+	flavor = CAIRO_GL_FLAVOR_DESKTOP;
+
+    return flavor;
+}
+
+unsigned long
+_cairo_gl_get_vbo_size (void)
+{
+    unsigned long vbo_size;
+
+    const char *env = getenv ("CAIRO_GL_VBO_SIZE");
+    if (env == NULL) {
+	vbo_size = CAIRO_GL_VBO_SIZE_DEFAULT;
+    } else {
+	errno = 0;
+	vbo_size = strtol (env, NULL, 10);
+	assert (errno == 0);
+	assert (vbo_size > 0);
+    }
+
+    return vbo_size;
+}
+
+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);
+}