ホーム › Graphics.GdiPlus › GdipGetImageEncodersSize

GdipGetImageEncodersSize

関数

利用可能な画像エンコーダー数と必要なバッファサイズを取得する。

DLLgdiplus.dll呼出規約winapi

シグネチャ

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

Status GdipGetImageEncodersSize(
    DWORD* numEncoders,
    DWORD* size
);

パラメーター

名前	型	方向
numEncoders	DWORD*	out
size	DWORD*	out

戻り値の型: Status

各言語での呼び出し定義

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

Status GdipGetImageEncodersSize(
    DWORD* numEncoders,
    DWORD* size
);

[DllImport("gdiplus.dll", ExactSpelling = true)]
static extern int GdipGetImageEncodersSize(
    out uint numEncoders,   // DWORD* out
    out uint size   // DWORD* out
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipGetImageEncodersSize(
    <Out> ByRef numEncoders As UInteger,   ' DWORD* out
    <Out> ByRef size As UInteger   ' DWORD* out
) As Integer
End Function

' numEncoders : DWORD* out
' size : DWORD* out
Declare PtrSafe Function GdipGetImageEncodersSize Lib "gdiplus" ( _
    ByRef numEncoders As Long, _
    ByRef size As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GdipGetImageEncodersSize = ctypes.windll.gdiplus.GdipGetImageEncodersSize
GdipGetImageEncodersSize.restype = ctypes.c_int
GdipGetImageEncodersSize.argtypes = [
    ctypes.POINTER(wintypes.DWORD),  # numEncoders : DWORD* out
    ctypes.POINTER(wintypes.DWORD),  # size : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipGetImageEncodersSize = Fiddle::Function.new(
  lib['GdipGetImageEncodersSize'],
  [
    Fiddle::TYPE_VOIDP,  # numEncoders : DWORD* out
    Fiddle::TYPE_VOIDP,  # size : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipGetImageEncodersSize(
        numEncoders: *mut u32,  // DWORD* out
        size: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipGetImageEncodersSize(out uint numEncoders, out uint size);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipGetImageEncodersSize' -Namespace Win32 -PassThru
# $api::GdipGetImageEncodersSize(numEncoders, size)

#uselib "gdiplus.dll"
#func global GdipGetImageEncodersSize "GdipGetImageEncodersSize" sptr, sptr
; GdipGetImageEncodersSize varptr(numEncoders), varptr(size)   ; 戻り値は stat
; numEncoders : DWORD* out -> "sptr"
; size : DWORD* out -> "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。

出力引数:

#uselib "gdiplus.dll"
#cfunc global GdipGetImageEncodersSize "GdipGetImageEncodersSize" var, var
; res = GdipGetImageEncodersSize(numEncoders, size)
; numEncoders : DWORD* out -> "var"
; size : DWORD* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。#uselib "gdiplus.dll"
#cfunc global GdipGetImageEncodersSize "GdipGetImageEncodersSize" sptr, sptr
; res = GdipGetImageEncodersSize(varptr(numEncoders), varptr(size))
; numEncoders : DWORD* out -> "sptr"
; size : DWORD* out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; Status GdipGetImageEncodersSize(DWORD* numEncoders, DWORD* size)
#uselib "gdiplus.dll"
#cfunc global GdipGetImageEncodersSize "GdipGetImageEncodersSize" var, var
; res = GdipGetImageEncodersSize(numEncoders, size)
; numEncoders : DWORD* out -> "var"
; size : DWORD* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。; Status GdipGetImageEncodersSize(DWORD* numEncoders, DWORD* size)
#uselib "gdiplus.dll"
#cfunc global GdipGetImageEncodersSize "GdipGetImageEncodersSize" intptr, intptr
; res = GdipGetImageEncodersSize(varptr(numEncoders), varptr(size))
; numEncoders : DWORD* out -> "intptr"
; size : DWORD* out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

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

var (
	gdiplus = windows.NewLazySystemDLL("gdiplus.dll")
	procGdipGetImageEncodersSize = gdiplus.NewProc("GdipGetImageEncodersSize")
)

// numEncoders (DWORD* out), size (DWORD* out)
r1, _, err := procGdipGetImageEncodersSize.Call(
	uintptr(numEncoders),
	uintptr(size),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipGetImageEncodersSize(
  numEncoders: Pointer;   // DWORD* out
  size: Pointer   // DWORD* out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipGetImageEncodersSize';

result := DllCall("gdiplus\GdipGetImageEncodersSize"
    , "Ptr", numEncoders   ; DWORD* out
    , "Ptr", size   ; DWORD* out
    , "Int")   ; return: Status

●GdipGetImageEncodersSize(numEncoders, size) = DLL("gdiplus.dll", "int GdipGetImageEncodersSize(void*, void*)")
# 呼び出し: GdipGetImageEncodersSize(numEncoders, size)
# numEncoders : DWORD* out -> "void*"
# size : DWORD* 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)。