glBlendFunc

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

void glBlendFunc(
    DWORD sfactor,
    DWORD dfactor
);

<DllImport("OPENGL32.dll", ExactSpelling:=True)>
Public Shared Sub glBlendFunc(
    sfactor As UInteger,   ' DWORD
    dfactor As UInteger   ' DWORD
)
End Sub

' sfactor : DWORD
' dfactor : DWORD
Declare PtrSafe Sub glBlendFunc Lib "opengl32" ( _
    ByVal sfactor As Long, _
    ByVal dfactor As Long)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

glBlendFunc = ctypes.windll.opengl32.glBlendFunc
glBlendFunc.restype = None
glBlendFunc.argtypes = [
    wintypes.DWORD,  # sfactor : DWORD
    wintypes.DWORD,  # dfactor : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OPENGL32.dll')
glBlendFunc = Fiddle::Function.new(
  lib['glBlendFunc'],
  [
    -Fiddle::TYPE_INT,  # sfactor : DWORD
    -Fiddle::TYPE_INT,  # dfactor : DWORD
  ],
  Fiddle::TYPE_VOID)

#[link(name = "opengl32")]
extern "system" {
    fn glBlendFunc(
        sfactor: u32,  // DWORD
        dfactor: u32  // DWORD
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OPENGL32.dll")]
public static extern void glBlendFunc(uint sfactor, uint dfactor);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OPENGL32_glBlendFunc' -Namespace Win32 -PassThru
# $api::glBlendFunc(sfactor, dfactor)

#uselib "OPENGL32.dll"
#func global glBlendFunc "glBlendFunc" sptr, sptr
; glBlendFunc sfactor, dfactor
; sfactor : DWORD -> "sptr"
; dfactor : DWORD -> "sptr"

#uselib "OPENGL32.dll"
#func global glBlendFunc "glBlendFunc" int, int
; glBlendFunc sfactor, dfactor
; sfactor : DWORD -> "int"
; dfactor : DWORD -> "int"

; void glBlendFunc(DWORD sfactor, DWORD dfactor)
#uselib "OPENGL32.dll"
#func global glBlendFunc "glBlendFunc" int, int
; glBlendFunc sfactor, dfactor
; sfactor : DWORD -> "int"
; dfactor : DWORD -> "int"

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

var (
	opengl32 = windows.NewLazySystemDLL("OPENGL32.dll")
	procglBlendFunc = opengl32.NewProc("glBlendFunc")
)

// sfactor (DWORD), dfactor (DWORD)
r1, _, err := procglBlendFunc.Call(
	uintptr(sfactor),
	uintptr(dfactor),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure glBlendFunc(
  sfactor: DWORD;   // DWORD
  dfactor: DWORD   // DWORD
); stdcall;
  external 'OPENGL32.dll' name 'glBlendFunc';

result := DllCall("OPENGL32\glBlendFunc"
    , "UInt", sfactor   ; DWORD
    , "UInt", dfactor   ; DWORD
    , "Int")   ; return: void

●glBlendFunc(sfactor, dfactor) = DLL("OPENGL32.dll", "int glBlendFunc(dword, dword)")
# 呼び出し: glBlendFunc(sfactor, dfactor)
# sfactor : DWORD -> "dword"
# dfactor : DWORD -> "dword"
# 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 glBlendFunc(
    sfactor: u32, // DWORD
    dfactor: u32 // DWORD
) callconv(std.os.windows.WINAPI) void;

proc glBlendFunc(
    sfactor: uint32,  # DWORD
    dfactor: uint32  # DWORD
) {.importc: "glBlendFunc", stdcall, dynlib: "OPENGL32.dll".}

pragma(lib, "opengl32");
extern(Windows)
void glBlendFunc(
    uint sfactor,   // DWORD
    uint dfactor   // DWORD
);

ccall((:glBlendFunc, "OPENGL32.dll"), stdcall, Cvoid,
      (UInt32, UInt32),
      sfactor, dfactor)
# sfactor : DWORD -> UInt32
# dfactor : DWORD -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void glBlendFunc(
    uint32_t sfactor,
    uint32_t dfactor);
]]
local opengl32 = ffi.load("opengl32")
-- opengl32.glBlendFunc(sfactor, dfactor)
-- sfactor : DWORD
-- dfactor : DWORD
-- 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 glBlendFunc = lib.func('__stdcall', 'glBlendFunc', 'void', ['uint32_t', 'uint32_t']);
// glBlendFunc(sfactor, dfactor)
// sfactor : DWORD -> 'uint32_t'
// dfactor : DWORD -> 'uint32_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", {
  glBlendFunc: { parameters: ["u32", "u32"], result: "void" },
});
// lib.symbols.glBlendFunc(sfactor, dfactor)
// sfactor : DWORD -> "u32"
// dfactor : DWORD -> "u32"
// 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 glBlendFunc(
    uint32_t sfactor,
    uint32_t dfactor);
C, "OPENGL32.dll");
// $ffi->glBlendFunc(sfactor, dfactor);
// sfactor : DWORD
// dfactor : DWORD
// 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 glBlendFunc(
        int sfactor,   // DWORD
        int dfactor   // DWORD
    );
}

@[Link("opengl32")]
lib LibOPENGL32
  fun glBlendFunc = glBlendFunc(
    sfactor : UInt32,   # DWORD
    dfactor : UInt32   # DWORD
  ) : 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 glBlendFuncNative = Void Function(Uint32, Uint32);
typedef glBlendFuncDart = void Function(int, int);
final glBlendFunc = DynamicLibrary.open('OPENGL32.dll')
    .lookupFunction<glBlendFuncNative, glBlendFuncDart>('glBlendFunc');
// sfactor : DWORD -> Uint32
// dfactor : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
procedure glBlendFunc(
  sfactor: DWORD;   // DWORD
  dfactor: DWORD   // DWORD
); stdcall;
  external 'OPENGL32.dll' name 'glBlendFunc';

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

foreign import stdcall safe "glBlendFunc"
  c_glBlendFunc :: Word32 -> Word32 -> IO ()
-- sfactor : DWORD -> Word32
-- dfactor : DWORD -> Word32
-- 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 glblendfunc =
  foreign "glBlendFunc"
    (uint32_t @-> uint32_t @-> returning void)
(* sfactor : DWORD -> uint32_t *)
(* dfactor : DWORD -> uint32_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 ("glBlendFunc" gl-blend-func :convention :stdcall) :void
  (sfactor :uint32)   ; DWORD
  (dfactor :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $glBlendFunc = Win32::API::More->new('OPENGL32',
    'void glBlendFunc(DWORD sfactor, DWORD dfactor)');
# my $ret = $glBlendFunc->Call($sfactor, $dfactor);
# sfactor : DWORD -> DWORD
# dfactor : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。