OpenGL Type

C Type	Bitdepth	Description	Common Enum
GLboolean	1+	A boolean value, either GL_TRUE or GL_FALSE
GLbyte	8	Signed, 2's complement binary integer	GL_BYTE
GLubyte	8	Unsigned binary integer	GL_UNSIGNED_BYTE
GLshort	16	Signed, 2's complement binary integer	GL_SHORT
GLushort	16	Unsigned binary integer	GL_UNSIGNED_SHORT
GLint	32	Signed, 2's complement binary integer	GL_INT
GLuint	32	Unsigned binary integer	GL_UNSIGNED_INT
GLfixed	32	Signed, 2's complement 16.16 integer	GL_FIXED
GLint64	64	Signed, 2's complement binary integer
GLuint64	64	Unsigned binary integer
GLsizei	32	A non-negative binary integer, for sizes.
GLenum	32	An OpenGL enumerator value
GLintptr	ptrbits​1	Signed, 2's complement binary integer
GLsizeiptr	ptrbits​1	Non-negative binary integer size, for memory offsets and ranges
GLsync	ptrbits​1	Sync Object handle
GLbitfield	32	A bitfield value
GLhalf	16	An IEEE-754 floating-point value	GL_HALF_FLOAT
GLfloat	32	An IEEE-754 floating-point value	GL_FLOAT
GLclampf	32	An IEEE-754 floating-point value, clamped to the range [0,1]
GLdouble	64	An IEEE-754 floating-point value	GL_DOUBLE
GLclampd	64	An IEEE-754 floating-point value, clamped to the range [0,1]