1
/* ------------------------------------------------------------------------- */
4
* Search for name in the extensions string. Use of strstr()
5
* is not sufficient because extension names can be prefixes of
6
* other extension names. Could use strtok() but the constant
7
* string returned by glGetString might be in read-only memory.
9
GLboolean glewGetExtension (const char* name)
13
GLuint len = _glewStrLen((const GLubyte*)name);
14
p = (GLubyte*)glGetString(GL_EXTENSIONS);
15
if (0 == p) return GL_FALSE;
16
end = p + _glewStrLen(p);
19
GLuint n = _glewStrCLen(p, ' ');
20
if (len == n && _glewStrSame((const GLubyte*)name, p, n)) return GL_TRUE;
26
/* ------------------------------------------------------------------------- */
31
GLenum glewContextInit (GLEW_CONTEXT_ARG_DEF_LIST)
34
GLuint dot, major, minor;
35
/* query opengl version */
36
s = glGetString(GL_VERSION);
37
dot = _glewStrCLen(s, '.');
40
if (dot == 0 || s[minor] == '\0')
41
return GLEW_ERROR_NO_GL_VERSION;
42
if (s[major] == '1' && s[minor] == '0')
44
return GLEW_ERROR_GL_VERSION_10_ONLY;
48
CONST_CAST(GLEW_VERSION_1_1) = GL_TRUE;
51
CONST_CAST(GLEW_VERSION_1_2) = GL_TRUE;
52
CONST_CAST(GLEW_VERSION_1_3) = GL_TRUE;
53
CONST_CAST(GLEW_VERSION_1_4) = GL_TRUE;
54
CONST_CAST(GLEW_VERSION_1_5) = GL_TRUE;
55
CONST_CAST(GLEW_VERSION_2_0) = GL_TRUE;
58
CONST_CAST(GLEW_VERSION_2_1) = GL_TRUE;
65
CONST_CAST(GLEW_VERSION_1_2) = GL_TRUE;
66
CONST_CAST(GLEW_VERSION_1_3) = GL_TRUE;
67
CONST_CAST(GLEW_VERSION_1_4) = GL_TRUE;
68
CONST_CAST(GLEW_VERSION_1_5) = GL_TRUE;
69
CONST_CAST(GLEW_VERSION_2_0) = GL_FALSE;
70
CONST_CAST(GLEW_VERSION_2_1) = GL_FALSE;
74
CONST_CAST(GLEW_VERSION_1_2) = GL_TRUE;
75
CONST_CAST(GLEW_VERSION_1_3) = GL_TRUE;
76
CONST_CAST(GLEW_VERSION_1_4) = GL_TRUE;
77
CONST_CAST(GLEW_VERSION_1_5) = GL_FALSE;
78
CONST_CAST(GLEW_VERSION_2_0) = GL_FALSE;
79
CONST_CAST(GLEW_VERSION_2_1) = GL_FALSE;
83
CONST_CAST(GLEW_VERSION_1_2) = GL_TRUE;
84
CONST_CAST(GLEW_VERSION_1_3) = GL_TRUE;
85
CONST_CAST(GLEW_VERSION_1_4) = GL_FALSE;
86
CONST_CAST(GLEW_VERSION_1_5) = GL_FALSE;
87
CONST_CAST(GLEW_VERSION_2_0) = GL_FALSE;
88
CONST_CAST(GLEW_VERSION_2_1) = GL_FALSE;
92
CONST_CAST(GLEW_VERSION_1_2) = GL_TRUE;
93
CONST_CAST(GLEW_VERSION_1_3) = GL_FALSE;
94
CONST_CAST(GLEW_VERSION_1_4) = GL_FALSE;
95
CONST_CAST(GLEW_VERSION_1_5) = GL_FALSE;
96
CONST_CAST(GLEW_VERSION_2_0) = GL_FALSE;
97
CONST_CAST(GLEW_VERSION_2_1) = GL_FALSE;
101
CONST_CAST(GLEW_VERSION_1_2) = GL_FALSE;
102
CONST_CAST(GLEW_VERSION_1_3) = GL_FALSE;
103
CONST_CAST(GLEW_VERSION_1_4) = GL_FALSE;
104
CONST_CAST(GLEW_VERSION_1_5) = GL_FALSE;
105
CONST_CAST(GLEW_VERSION_2_0) = GL_FALSE;
106
CONST_CAST(GLEW_VERSION_2_1) = GL_FALSE;
110
/* initialize extensions */
1
/* ------------------------------------------------------------------------- */
4
* Search for name in the extensions string. Use of strstr()
5
* is not sufficient because extension names can be prefixes of
6
* other extension names. Could use strtok() but the constant
7
* string returned by glGetString might be in read-only memory.
9
GLboolean glewGetExtension (const char* name)
13
GLuint len = _glewStrLen((const GLubyte*)name);
14
p = (GLubyte*)glGetString(GL_EXTENSIONS);
15
if (0 == p) return GL_FALSE;
16
end = p + _glewStrLen(p);
19
GLuint n = _glewStrCLen(p, ' ');
20
if (len == n && _glewStrSame((const GLubyte*)name, p, n)) return GL_TRUE;
26
/* ------------------------------------------------------------------------- */
31
GLenum glewContextInit (GLEW_CONTEXT_ARG_DEF_LIST)
34
GLuint dot, major, minor;
35
/* query opengl version */
36
s = glGetString(GL_VERSION);
37
dot = _glewStrCLen(s, '.');
40
if (dot == 0 || s[minor] == '\0')
41
return GLEW_ERROR_NO_GL_VERSION;
42
if (s[major] == '1' && s[minor] == '0')
44
return GLEW_ERROR_GL_VERSION_10_ONLY;
48
CONST_CAST(GLEW_VERSION_1_1) = GL_TRUE;
51
CONST_CAST(GLEW_VERSION_1_2) = GL_TRUE;
52
CONST_CAST(GLEW_VERSION_1_3) = GL_TRUE;
53
CONST_CAST(GLEW_VERSION_1_4) = GL_TRUE;
54
CONST_CAST(GLEW_VERSION_1_5) = GL_TRUE;
55
CONST_CAST(GLEW_VERSION_2_0) = GL_TRUE;
58
CONST_CAST(GLEW_VERSION_2_1) = GL_TRUE;
65
CONST_CAST(GLEW_VERSION_1_2) = GL_TRUE;
66
CONST_CAST(GLEW_VERSION_1_3) = GL_TRUE;
67
CONST_CAST(GLEW_VERSION_1_4) = GL_TRUE;
68
CONST_CAST(GLEW_VERSION_1_5) = GL_TRUE;
69
CONST_CAST(GLEW_VERSION_2_0) = GL_FALSE;
70
CONST_CAST(GLEW_VERSION_2_1) = GL_FALSE;
74
CONST_CAST(GLEW_VERSION_1_2) = GL_TRUE;
75
CONST_CAST(GLEW_VERSION_1_3) = GL_TRUE;
76
CONST_CAST(GLEW_VERSION_1_4) = GL_TRUE;
77
CONST_CAST(GLEW_VERSION_1_5) = GL_FALSE;
78
CONST_CAST(GLEW_VERSION_2_0) = GL_FALSE;
79
CONST_CAST(GLEW_VERSION_2_1) = GL_FALSE;
83
CONST_CAST(GLEW_VERSION_1_2) = GL_TRUE;
84
CONST_CAST(GLEW_VERSION_1_3) = GL_TRUE;
85
CONST_CAST(GLEW_VERSION_1_4) = GL_FALSE;
86
CONST_CAST(GLEW_VERSION_1_5) = GL_FALSE;
87
CONST_CAST(GLEW_VERSION_2_0) = GL_FALSE;
88
CONST_CAST(GLEW_VERSION_2_1) = GL_FALSE;
92
CONST_CAST(GLEW_VERSION_1_2) = GL_TRUE;
93
CONST_CAST(GLEW_VERSION_1_3) = GL_FALSE;
94
CONST_CAST(GLEW_VERSION_1_4) = GL_FALSE;
95
CONST_CAST(GLEW_VERSION_1_5) = GL_FALSE;
96
CONST_CAST(GLEW_VERSION_2_0) = GL_FALSE;
97
CONST_CAST(GLEW_VERSION_2_1) = GL_FALSE;
101
CONST_CAST(GLEW_VERSION_1_2) = GL_FALSE;
102
CONST_CAST(GLEW_VERSION_1_3) = GL_FALSE;
103
CONST_CAST(GLEW_VERSION_1_4) = GL_FALSE;
104
CONST_CAST(GLEW_VERSION_1_5) = GL_FALSE;
105
CONST_CAST(GLEW_VERSION_2_0) = GL_FALSE;
106
CONST_CAST(GLEW_VERSION_2_1) = GL_FALSE;
110
/* initialize extensions */