glGetLightfv

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

void glGetLightfv(
    DWORD light,
    DWORD pname,
    FLOAT* params
);

<DllImport("OPENGL32.dll", ExactSpelling:=True)>
Public Shared Sub glGetLightfv(
    light As UInteger,   ' DWORD
    pname As UInteger,   ' DWORD
    ByRef params As Single   ' FLOAT* in/out
)
End Sub

' light : DWORD
' pname : DWORD
' params : FLOAT* in/out
Declare PtrSafe Sub glGetLightfv Lib "opengl32" ( _
    ByVal light As Long, _
    ByVal pname As Long, _
    ByRef params As Single)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

glGetLightfv = ctypes.windll.opengl32.glGetLightfv
glGetLightfv.restype = None
glGetLightfv.argtypes = [
    wintypes.DWORD,  # light : DWORD
    wintypes.DWORD,  # pname : DWORD
    ctypes.POINTER(ctypes.c_float),  # params : FLOAT* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OPENGL32.dll')
glGetLightfv = Fiddle::Function.new(
  lib['glGetLightfv'],
  [
    -Fiddle::TYPE_INT,  # light : DWORD
    -Fiddle::TYPE_INT,  # pname : DWORD
    Fiddle::TYPE_VOIDP,  # params : FLOAT* in/out
  ],
  Fiddle::TYPE_VOID)

#[link(name = "opengl32")]
extern "system" {
    fn glGetLightfv(
        light: u32,  // DWORD
        pname: u32,  // DWORD
        params: *mut f32  // FLOAT* in/out
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OPENGL32.dll")]
public static extern void glGetLightfv(uint light, uint pname, ref float params);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OPENGL32_glGetLightfv' -Namespace Win32 -PassThru
# $api::glGetLightfv(light, pname, params)

#uselib "OPENGL32.dll"
#func global glGetLightfv "glGetLightfv" sptr, sptr, sptr
; glGetLightfv light, pname, varptr(params)
; light : DWORD -> "sptr"
; pname : DWORD -> "sptr"
; params : FLOAT* in/out -> "sptr"

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

var (
	opengl32 = windows.NewLazySystemDLL("OPENGL32.dll")
	procglGetLightfv = opengl32.NewProc("glGetLightfv")
)

// light (DWORD), pname (DWORD), params (FLOAT* in/out)
r1, _, err := procglGetLightfv.Call(
	uintptr(light),
	uintptr(pname),
	uintptr(params),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure glGetLightfv(
  light: DWORD;   // DWORD
  pname: DWORD;   // DWORD
  params: Pointer   // FLOAT* in/out
); stdcall;
  external 'OPENGL32.dll' name 'glGetLightfv';

result := DllCall("OPENGL32\glGetLightfv"
    , "UInt", light   ; DWORD
    , "UInt", pname   ; DWORD
    , "Ptr", params   ; FLOAT* in/out
    , "Int")   ; return: void

●glGetLightfv(light, pname, params) = DLL("OPENGL32.dll", "int glGetLightfv(dword, dword, void*)")
# 呼び出し: glGetLightfv(light, pname, params)
# light : DWORD -> "dword"
# pname : DWORD -> "dword"
# params : FLOAT* in/out -> "void*"
# 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 glGetLightfv(
    light: u32, // DWORD
    pname: u32, // DWORD
    params: [*c]f32 // FLOAT* in/out
) callconv(std.os.windows.WINAPI) void;

proc glGetLightfv(
    light: uint32,  # DWORD
    pname: uint32,  # DWORD
    params: ptr float32  # FLOAT* in/out
) {.importc: "glGetLightfv", stdcall, dynlib: "OPENGL32.dll".}

pragma(lib, "opengl32");
extern(Windows)
void glGetLightfv(
    uint light,   // DWORD
    uint pname,   // DWORD
    float* params   // FLOAT* in/out
);

ccall((:glGetLightfv, "OPENGL32.dll"), stdcall, Cvoid,
      (UInt32, UInt32, Ptr{Float32}),
      light, pname, params)
# light : DWORD -> UInt32
# pname : DWORD -> UInt32
# params : FLOAT* in/out -> Ptr{Float32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void glGetLightfv(
    uint32_t light,
    uint32_t pname,
    float* params);
]]
local opengl32 = ffi.load("opengl32")
-- opengl32.glGetLightfv(light, pname, params)
-- light : DWORD
-- pname : DWORD
-- params : FLOAT* in/out
-- 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 glGetLightfv = lib.func('__stdcall', 'glGetLightfv', 'void', ['uint32_t', 'uint32_t', 'float *']);
// glGetLightfv(light, pname, params)
// light : DWORD -> 'uint32_t'
// pname : DWORD -> 'uint32_t'
// params : FLOAT* in/out -> 'float *'
// 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", {
  glGetLightfv: { parameters: ["u32", "u32", "pointer"], result: "void" },
});
// lib.symbols.glGetLightfv(light, pname, params)
// light : DWORD -> "u32"
// pname : DWORD -> "u32"
// params : FLOAT* in/out -> "pointer"
// 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 glGetLightfv(
    uint32_t light,
    uint32_t pname,
    float* params);
C, "OPENGL32.dll");
// $ffi->glGetLightfv(light, pname, params);
// light : DWORD
// pname : DWORD
// params : FLOAT* in/out
// 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 glGetLightfv(
        int light,   // DWORD
        int pname,   // DWORD
        FloatByReference params   // FLOAT* in/out
    );
}

@[Link("opengl32")]
lib LibOPENGL32
  fun glGetLightfv = glGetLightfv(
    light : UInt32,   # DWORD
    pname : UInt32,   # DWORD
    params : Float32*   # FLOAT* in/out
  ) : 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 glGetLightfvNative = Void Function(Uint32, Uint32, Pointer<Float>);
typedef glGetLightfvDart = void Function(int, int, Pointer<Float>);
final glGetLightfv = DynamicLibrary.open('OPENGL32.dll')
    .lookupFunction<glGetLightfvNative, glGetLightfvDart>('glGetLightfv');
// light : DWORD -> Uint32
// pname : DWORD -> Uint32
// params : FLOAT* in/out -> Pointer<Float>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
procedure glGetLightfv(
  light: DWORD;   // DWORD
  pname: DWORD;   // DWORD
  params: Pointer   // FLOAT* in/out
); stdcall;
  external 'OPENGL32.dll' name 'glGetLightfv';

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

foreign import stdcall safe "glGetLightfv"
  c_glGetLightfv :: Word32 -> Word32 -> Ptr CFloat -> IO ()
-- light : DWORD -> Word32
-- pname : DWORD -> Word32
-- params : FLOAT* in/out -> Ptr CFloat
-- 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 glgetlightfv =
  foreign "glGetLightfv"
    (uint32_t @-> uint32_t @-> (ptr float) @-> returning void)
(* light : DWORD -> uint32_t *)
(* pname : DWORD -> uint32_t *)
(* params : FLOAT* in/out -> (ptr float) *)
(* 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 ("glGetLightfv" gl-get-lightfv :convention :stdcall) :void
  (light :uint32)   ; DWORD
  (pname :uint32)   ; DWORD
  (params :pointer))   ; FLOAT* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $glGetLightfv = Win32::API::More->new('OPENGL32',
    'void glGetLightfv(DWORD light, DWORD pname, LPVOID params)');
# my $ret = $glGetLightfv->Call($light, $pname, $params);
# light : DWORD -> DWORD
# pname : DWORD -> DWORD
# params : FLOAT* in/out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。