glColor3b

// OPENGL32.dll
#include <windows.h>

void glColor3b(
    CHAR red,
    CHAR green,
    CHAR blue
);

<DllImport("OPENGL32.dll", ExactSpelling:=True)>
Public Shared Sub glColor3b(
    red As SByte,   ' CHAR
    green As SByte,   ' CHAR
    blue As SByte   ' CHAR
)
End Sub

' red : CHAR
' green : CHAR
' blue : CHAR
Declare PtrSafe Sub glColor3b Lib "opengl32" ( _
    ByVal red As Byte, _
    ByVal green As Byte, _
    ByVal blue As Byte)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

glColor3b = ctypes.windll.opengl32.glColor3b
glColor3b.restype = None
glColor3b.argtypes = [
    ctypes.c_byte,  # red : CHAR
    ctypes.c_byte,  # green : CHAR
    ctypes.c_byte,  # blue : CHAR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OPENGL32.dll')
glColor3b = Fiddle::Function.new(
  lib['glColor3b'],
  [
    Fiddle::TYPE_CHAR,  # red : CHAR
    Fiddle::TYPE_CHAR,  # green : CHAR
    Fiddle::TYPE_CHAR,  # blue : CHAR
  ],
  Fiddle::TYPE_VOID)

#[link(name = "opengl32")]
extern "system" {
    fn glColor3b(
        red: i8,  // CHAR
        green: i8,  // CHAR
        blue: i8  // CHAR
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OPENGL32.dll")]
public static extern void glColor3b(sbyte red, sbyte green, sbyte blue);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OPENGL32_glColor3b' -Namespace Win32 -PassThru
# $api::glColor3b(red, green, blue)

#uselib "OPENGL32.dll"
#func global glColor3b "glColor3b" sptr, sptr, sptr
; glColor3b red, green, blue
; red : CHAR -> "sptr"
; green : CHAR -> "sptr"
; blue : CHAR -> "sptr"

#uselib "OPENGL32.dll"
#func global glColor3b "glColor3b" int, int, int
; glColor3b red, green, blue
; red : CHAR -> "int"
; green : CHAR -> "int"
; blue : CHAR -> "int"

; void glColor3b(CHAR red, CHAR green, CHAR blue)
#uselib "OPENGL32.dll"
#func global glColor3b "glColor3b" int, int, int
; glColor3b red, green, blue
; red : CHAR -> "int"
; green : CHAR -> "int"
; blue : CHAR -> "int"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	opengl32 = windows.NewLazySystemDLL("OPENGL32.dll")
	procglColor3b = opengl32.NewProc("glColor3b")
)

// red (CHAR), green (CHAR), blue (CHAR)
r1, _, err := procglColor3b.Call(
	uintptr(red),
	uintptr(green),
	uintptr(blue),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure glColor3b(
  red: Shortint;   // CHAR
  green: Shortint;   // CHAR
  blue: Shortint   // CHAR
); stdcall;
  external 'OPENGL32.dll' name 'glColor3b';

result := DllCall("OPENGL32\glColor3b"
    , "Char", red   ; CHAR
    , "Char", green   ; CHAR
    , "Char", blue   ; CHAR
    , "Int")   ; return: void

●glColor3b(red, green, blue) = DLL("OPENGL32.dll", "int glColor3b(char, char, char)")
# 呼び出し: glColor3b(red, green, blue)
# red : CHAR -> "char"
# green : CHAR -> "char"
# blue : CHAR -> "char"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。

const std = @import("std");

extern "opengl32" fn glColor3b(
    red: i8, // CHAR
    green: i8, // CHAR
    blue: i8 // CHAR
) callconv(std.os.windows.WINAPI) void;

proc glColor3b(
    red: int8,  # CHAR
    green: int8,  # CHAR
    blue: int8  # CHAR
) {.importc: "glColor3b", stdcall, dynlib: "OPENGL32.dll".}

pragma(lib, "opengl32");
extern(Windows)
void glColor3b(
    byte red,   // CHAR
    byte green,   // CHAR
    byte blue   // CHAR
);

ccall((:glColor3b, "OPENGL32.dll"), stdcall, Cvoid,
      (Int8, Int8, Int8),
      red, green, blue)
# red : CHAR -> Int8
# green : CHAR -> Int8
# blue : CHAR -> Int8
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void glColor3b(
    int8_t red,
    int8_t green,
    int8_t blue);
]]
local opengl32 = ffi.load("opengl32")
-- opengl32.glColor3b(red, green, blue)
-- red : CHAR
-- green : CHAR
-- blue : CHAR
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('OPENGL32.dll');
const glColor3b = lib.func('__stdcall', 'glColor3b', 'void', ['int8_t', 'int8_t', 'int8_t']);
// glColor3b(red, green, blue)
// red : CHAR -> 'int8_t'
// green : CHAR -> 'int8_t'
// blue : CHAR -> 'int8_t'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("OPENGL32.dll", {
  glColor3b: { parameters: ["i8", "i8", "i8"], result: "void" },
});
// lib.symbols.glColor3b(red, green, blue)
// red : CHAR -> "i8"
// green : CHAR -> "i8"
// blue : CHAR -> "i8"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
void glColor3b(
    int8_t red,
    int8_t green,
    int8_t blue);
C, "OPENGL32.dll");
// $ffi->glColor3b(red, green, blue);
// red : CHAR
// green : CHAR
// blue : CHAR
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Opengl32 extends StdCallLibrary {
    Opengl32 INSTANCE = Native.load("opengl32", Opengl32.class);
    void glColor3b(
        byte red,   // CHAR
        byte green,   // CHAR
        byte blue   // CHAR
    );
}

@[Link("opengl32")]
lib LibOPENGL32
  fun glColor3b = glColor3b(
    red : Int8,   # CHAR
    green : Int8,   # CHAR
    blue : Int8   # CHAR
  ) : Void
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef glColor3bNative = Void Function(Int8, Int8, Int8);
typedef glColor3bDart = void Function(int, int, int);
final glColor3b = DynamicLibrary.open('OPENGL32.dll')
    .lookupFunction<glColor3bNative, glColor3bDart>('glColor3b');
// red : CHAR -> Int8
// green : CHAR -> Int8
// blue : CHAR -> Int8
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
procedure glColor3b(
  red: Shortint;   // CHAR
  green: Shortint;   // CHAR
  blue: Shortint   // CHAR
); stdcall;
  external 'OPENGL32.dll' name 'glColor3b';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "glColor3b"
  c_glColor3b :: Int8 -> Int8 -> Int8 -> IO ()
-- red : CHAR -> Int8
-- green : CHAR -> Int8
-- blue : CHAR -> Int8
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let glcolor3b =
  foreign "glColor3b"
    (int8_t @-> int8_t @-> int8_t @-> returning void)
(* red : CHAR -> int8_t *)
(* green : CHAR -> int8_t *)
(* blue : CHAR -> int8_t *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library opengl32 (t "OPENGL32.dll"))
(cffi:use-foreign-library opengl32)

(cffi:defcfun ("glColor3b" gl-color3b :convention :stdcall) :void
  (red :int8)   ; CHAR
  (green :int8)   ; CHAR
  (blue :int8))   ; CHAR
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $glColor3b = Win32::API::More->new('OPENGL32',
    'void glColor3b(char red, char green, char blue)');
# my $ret = $glColor3b->Call($red, $green, $blue);
# red : CHAR -> char
# green : CHAR -> char
# blue : CHAR -> char
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。