ホーム › Graphics.GdiPlus › GdipGetImageEncoders

GdipGetImageEncoders

関数

インストール済み画像エンコーダーの情報一覧を取得する。

DLLgdiplus.dll呼出規約winapi

シグネチャ

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

Status GdipGetImageEncoders(
    DWORD numEncoders,
    DWORD size,
    ImageCodecInfo* encoders
);

パラメーター

名前	型	方向
numEncoders	DWORD	in
size	DWORD	in
encoders	ImageCodecInfo*	out

戻り値の型: Status

各言語での呼び出し定義

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

Status GdipGetImageEncoders(
    DWORD numEncoders,
    DWORD size,
    ImageCodecInfo* encoders
);

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

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipGetImageEncoders(
    numEncoders As UInteger,   ' DWORD
    size As UInteger,   ' DWORD
    encoders As IntPtr   ' ImageCodecInfo* out
) As Integer
End Function

' numEncoders : DWORD
' size : DWORD
' encoders : ImageCodecInfo* out
Declare PtrSafe Function GdipGetImageEncoders Lib "gdiplus" ( _
    ByVal numEncoders As Long, _
    ByVal size As Long, _
    ByVal encoders 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

GdipGetImageEncoders = ctypes.windll.gdiplus.GdipGetImageEncoders
GdipGetImageEncoders.restype = ctypes.c_int
GdipGetImageEncoders.argtypes = [
    wintypes.DWORD,  # numEncoders : DWORD
    wintypes.DWORD,  # size : DWORD
    ctypes.c_void_p,  # encoders : ImageCodecInfo* out
]

require 'fiddle'
require 'fiddle/import'

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

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

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

#uselib "gdiplus.dll"
#func global GdipGetImageEncoders "GdipGetImageEncoders" sptr, sptr, sptr
; GdipGetImageEncoders numEncoders, size, varptr(encoders)   ; 戻り値は stat
; numEncoders : DWORD -> "sptr"
; size : DWORD -> "sptr"
; encoders : ImageCodecInfo* 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 GdipGetImageEncoders "GdipGetImageEncoders" int, int, var
; res = GdipGetImageEncoders(numEncoders, size, encoders)
; numEncoders : DWORD -> "int"
; size : DWORD -> "int"
; encoders : ImageCodecInfo* 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 GdipGetImageEncoders "GdipGetImageEncoders" int, int, sptr
; res = GdipGetImageEncoders(numEncoders, size, varptr(encoders))
; numEncoders : DWORD -> "int"
; size : DWORD -> "int"
; encoders : ImageCodecInfo* 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 GdipGetImageEncoders(DWORD numEncoders, DWORD size, ImageCodecInfo* encoders)
#uselib "gdiplus.dll"
#cfunc global GdipGetImageEncoders "GdipGetImageEncoders" int, int, var
; res = GdipGetImageEncoders(numEncoders, size, encoders)
; numEncoders : DWORD -> "int"
; size : DWORD -> "int"
; encoders : ImageCodecInfo* 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 GdipGetImageEncoders(DWORD numEncoders, DWORD size, ImageCodecInfo* encoders)
#uselib "gdiplus.dll"
#cfunc global GdipGetImageEncoders "GdipGetImageEncoders" int, int, intptr
; res = GdipGetImageEncoders(numEncoders, size, varptr(encoders))
; numEncoders : DWORD -> "int"
; size : DWORD -> "int"
; encoders : ImageCodecInfo* 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")
	procGdipGetImageEncoders = gdiplus.NewProc("GdipGetImageEncoders")
)

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

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

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

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