wglMakeCurrent

関数

指定したOpenGLレンダリングコンテキストを現在のものにする。

DLLOPENGL32.dll呼出規約winapiSetLastErrorあり対応OSWindows 2000 以降

シグネチャ

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

BOOL wglMakeCurrent(
    HDC param0,
    HGLRC param1
);

パラメーター

名前	型	方向
param0	HDC	in
param1	HGLRC	in

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL wglMakeCurrent(
    HDC param0,
    HGLRC param1
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("OPENGL32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool wglMakeCurrent(
    IntPtr param0,   // HDC
    IntPtr param1   // HGLRC
);

<DllImport("OPENGL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function wglMakeCurrent(
    param0 As IntPtr,   ' HDC
    param1 As IntPtr   ' HGLRC
) As Boolean
End Function

' param0 : HDC
' param1 : HGLRC
Declare PtrSafe Function wglMakeCurrent Lib "opengl32" ( _
    ByVal param0 As LongPtr, _
    ByVal param1 As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

wglMakeCurrent = ctypes.windll.opengl32.wglMakeCurrent
wglMakeCurrent.restype = wintypes.BOOL
wglMakeCurrent.argtypes = [
    wintypes.HANDLE,  # param0 : HDC
    wintypes.HANDLE,  # param1 : HGLRC
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OPENGL32.dll')
wglMakeCurrent = Fiddle::Function.new(
  lib['wglMakeCurrent'],
  [
    Fiddle::TYPE_VOIDP,  # param0 : HDC
    Fiddle::TYPE_VOIDP,  # param1 : HGLRC
  ],
  Fiddle::TYPE_INT)

#[link(name = "opengl32")]
extern "system" {
    fn wglMakeCurrent(
        param0: *mut core::ffi::c_void,  // HDC
        param1: *mut core::ffi::c_void  // HGLRC
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("OPENGL32.dll", SetLastError = true)]
public static extern bool wglMakeCurrent(IntPtr param0, IntPtr param1);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OPENGL32_wglMakeCurrent' -Namespace Win32 -PassThru
# $api::wglMakeCurrent(param0, param1)

#uselib "OPENGL32.dll"
#func global wglMakeCurrent "wglMakeCurrent" sptr, sptr
; wglMakeCurrent param0, param1   ; 戻り値は stat
; param0 : HDC -> "sptr"
; param1 : HGLRC -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "OPENGL32.dll"
#cfunc global wglMakeCurrent "wglMakeCurrent" sptr, sptr
; res = wglMakeCurrent(param0, param1)
; param0 : HDC -> "sptr"
; param1 : HGLRC -> "sptr"

; BOOL wglMakeCurrent(HDC param0, HGLRC param1)
#uselib "OPENGL32.dll"
#cfunc global wglMakeCurrent "wglMakeCurrent" intptr, intptr
; res = wglMakeCurrent(param0, param1)
; param0 : HDC -> "intptr"
; param1 : HGLRC -> "intptr"

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

var (
	opengl32 = windows.NewLazySystemDLL("OPENGL32.dll")
	procwglMakeCurrent = opengl32.NewProc("wglMakeCurrent")
)

// param0 (HDC), param1 (HGLRC)
r1, _, err := procwglMakeCurrent.Call(
	uintptr(param0),
	uintptr(param1),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function wglMakeCurrent(
  param0: THandle;   // HDC
  param1: THandle   // HGLRC
): BOOL; stdcall;
  external 'OPENGL32.dll' name 'wglMakeCurrent';

result := DllCall("OPENGL32\wglMakeCurrent"
    , "Ptr", param0   ; HDC
    , "Ptr", param1   ; HGLRC
    , "Int")   ; return: BOOL

●wglMakeCurrent(param0, param1) = DLL("OPENGL32.dll", "bool wglMakeCurrent(void*, void*)")
# 呼び出し: wglMakeCurrent(param0, param1)
# param0 : HDC -> "void*"
# param1 : HGLRC -> "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)。