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// Licensed under the Apache License, Version 2.0

// <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license

// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.

// All files in the project carrying such notice may not be copied, modified, or distributed

// except according to those terms.

use ctypes::{c_double, c_float, c_int, c_schar, c_short, c_uchar, c_uint, c_ushort, c_void};

//48

pub type GLenum = c_uint;

pub type GLboolean = c_uchar;

pub type GLbitfield = c_uint;

pub type GLbyte = c_schar;

pub type GLshort = c_short;

pub type GLint = c_int;

pub type GLsizei = c_int;

pub type GLubyte = c_uchar;

pub type GLushort = c_ushort;

pub type GLuint = c_uint;

pub type GLfloat = c_float;

pub type GLclampf = c_float;

pub type GLdouble = c_double;

pub type GLclampd = c_double;

pub type GLvoid = c_void;

//63

//68

//AccumOp

pub const GL_ACCUM: GLenum = 0x0100;

pub const GL_LOAD: GLenum = 0x0101;

pub const GL_RETURN: GLenum = 0x0102;

pub const GL_MULT: GLenum = 0x0103;

pub const GL_ADD: GLenum = 0x0104;

//AlphaFunction

pub const GL_NEVER: GLenum = 0x0200;

pub const GL_LESS: GLenum = 0x0201;

pub const GL_EQUAL: GLenum = 0x0202;

pub const GL_LEQUAL: GLenum = 0x0203;

pub const GL_GREATER: GLenum = 0x0204;

pub const GL_NOTEQUAL: GLenum = 0x0205;

pub const GL_GEQUAL: GLenum = 0x0206;

pub const GL_ALWAYS: GLenum = 0x0207;

// TODO: we're missing about 1500 lines of defines and methods

// until that time, you can use the excellent GL crate

// https://github.com/brendanzab/gl-rs

extern "system" {

    pub fn glAccum(

        op: GLenum,

        value: GLfloat,

);

    pub fn glAlphaFunc(

        func: GLenum,

        reference: GLclampf,

);