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GdipConvertToEmfPlusToFile

関数

メタファイルをEMF+形式に変換しファイルに出力する。

DLLgdiplus.dll呼出規約winapi

シグネチャ

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

Status GdipConvertToEmfPlusToFile(
    const GpGraphics* refGraphics,
    GpMetafile* metafile,
    INT* conversionFailureFlag,
    LPCWSTR filename,
    EmfType emfType,
    LPCWSTR description,
    GpMetafile** out_metafile
);

パラメーター

名前	型	方向	説明
refGraphics	GpGraphics*	in	変換基準とする参照用GpGraphicsオブジェクトへのポインタ。
metafile	GpMetafile*	inout	変換元のGpMetafileオブジェクトへのポインタ。
conversionFailureFlag	INT*	inout	変換失敗の有無を受け取る出力先のINTポインタ。NULL可。
filename	LPCWSTR	in	変換結果を保存するファイルパスを示すワイド文字列。
emfType	EmfType	in	出力するEMF+の種類を示すEmfType列挙値。
description	LPCWSTR	in	メタファイルに埋め込む説明文字列を示すワイド文字列。NULL可。
out_metafile	GpMetafile**	inout	変換後のGpMetafileオブジェクトへのポインタを受け取る出力先。

戻り値の型: Status

各言語での呼び出し定義

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

Status GdipConvertToEmfPlusToFile(
    const GpGraphics* refGraphics,
    GpMetafile* metafile,
    INT* conversionFailureFlag,
    LPCWSTR filename,
    EmfType emfType,
    LPCWSTR description,
    GpMetafile** out_metafile
);

[DllImport("gdiplus.dll", ExactSpelling = true)]
static extern int GdipConvertToEmfPlusToFile(
    IntPtr refGraphics,   // GpGraphics*
    IntPtr metafile,   // GpMetafile* in/out
    ref int conversionFailureFlag,   // INT* in/out
    [MarshalAs(UnmanagedType.LPWStr)] string filename,   // LPCWSTR
    int emfType,   // EmfType
    [MarshalAs(UnmanagedType.LPWStr)] string description,   // LPCWSTR
    IntPtr out_metafile   // GpMetafile** in/out
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipConvertToEmfPlusToFile(
    refGraphics As IntPtr,   ' GpGraphics*
    metafile As IntPtr,   ' GpMetafile* in/out
    ByRef conversionFailureFlag As Integer,   ' INT* in/out
    <MarshalAs(UnmanagedType.LPWStr)> filename As String,   ' LPCWSTR
    emfType As Integer,   ' EmfType
    <MarshalAs(UnmanagedType.LPWStr)> description As String,   ' LPCWSTR
    out_metafile As IntPtr   ' GpMetafile** in/out
) As Integer
End Function

' refGraphics : GpGraphics*
' metafile : GpMetafile* in/out
' conversionFailureFlag : INT* in/out
' filename : LPCWSTR
' emfType : EmfType
' description : LPCWSTR
' out_metafile : GpMetafile** in/out
Declare PtrSafe Function GdipConvertToEmfPlusToFile Lib "gdiplus" ( _
    ByVal refGraphics As LongPtr, _
    ByVal metafile As LongPtr, _
    ByRef conversionFailureFlag As Long, _
    ByVal filename As LongPtr, _
    ByVal emfType As Long, _
    ByVal description As LongPtr, _
    ByVal out_metafile 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

GdipConvertToEmfPlusToFile = ctypes.windll.gdiplus.GdipConvertToEmfPlusToFile
GdipConvertToEmfPlusToFile.restype = ctypes.c_int
GdipConvertToEmfPlusToFile.argtypes = [
    ctypes.c_void_p,  # refGraphics : GpGraphics*
    ctypes.c_void_p,  # metafile : GpMetafile* in/out
    ctypes.POINTER(ctypes.c_int),  # conversionFailureFlag : INT* in/out
    wintypes.LPCWSTR,  # filename : LPCWSTR
    ctypes.c_int,  # emfType : EmfType
    wintypes.LPCWSTR,  # description : LPCWSTR
    ctypes.c_void_p,  # out_metafile : GpMetafile** in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipConvertToEmfPlusToFile = Fiddle::Function.new(
  lib['GdipConvertToEmfPlusToFile'],
  [
    Fiddle::TYPE_VOIDP,  # refGraphics : GpGraphics*
    Fiddle::TYPE_VOIDP,  # metafile : GpMetafile* in/out
    Fiddle::TYPE_VOIDP,  # conversionFailureFlag : INT* in/out
    Fiddle::TYPE_VOIDP,  # filename : LPCWSTR
    Fiddle::TYPE_INT,  # emfType : EmfType
    Fiddle::TYPE_VOIDP,  # description : LPCWSTR
    Fiddle::TYPE_VOIDP,  # out_metafile : GpMetafile** in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipConvertToEmfPlusToFile(
        refGraphics: *const GpGraphics,  // GpGraphics*
        metafile: *mut GpMetafile,  // GpMetafile* in/out
        conversionFailureFlag: *mut i32,  // INT* in/out
        filename: *const u16,  // LPCWSTR
        emfType: i32,  // EmfType
        description: *const u16,  // LPCWSTR
        out_metafile: *mut *mut GpMetafile  // GpMetafile** in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipConvertToEmfPlusToFile(IntPtr refGraphics, IntPtr metafile, ref int conversionFailureFlag, [MarshalAs(UnmanagedType.LPWStr)] string filename, int emfType, [MarshalAs(UnmanagedType.LPWStr)] string description, IntPtr out_metafile);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipConvertToEmfPlusToFile' -Namespace Win32 -PassThru
# $api::GdipConvertToEmfPlusToFile(refGraphics, metafile, conversionFailureFlag, filename, emfType, description, out_metafile)

#uselib "gdiplus.dll"
#func global GdipConvertToEmfPlusToFile "GdipConvertToEmfPlusToFile" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; GdipConvertToEmfPlusToFile varptr(refGraphics), varptr(metafile), varptr(conversionFailureFlag), filename, emfType, description, varptr(out_metafile)   ; 戻り値は stat
; refGraphics : GpGraphics* -> "sptr"
; metafile : GpMetafile* in/out -> "sptr"
; conversionFailureFlag : INT* in/out -> "sptr"
; filename : LPCWSTR -> "sptr"
; emfType : EmfType -> "sptr"
; description : LPCWSTR -> "sptr"
; out_metafile : GpMetafile** in/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 GdipConvertToEmfPlusToFile "GdipConvertToEmfPlusToFile" var, var, var, wstr, int, wstr, var
; res = GdipConvertToEmfPlusToFile(refGraphics, metafile, conversionFailureFlag, filename, emfType, description, out_metafile)
; refGraphics : GpGraphics* -> "var"
; metafile : GpMetafile* in/out -> "var"
; conversionFailureFlag : INT* in/out -> "var"
; filename : LPCWSTR -> "wstr"
; emfType : EmfType -> "int"
; description : LPCWSTR -> "wstr"
; out_metafile : GpMetafile** in/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 GdipConvertToEmfPlusToFile "GdipConvertToEmfPlusToFile" sptr, sptr, sptr, wstr, int, wstr, sptr
; res = GdipConvertToEmfPlusToFile(varptr(refGraphics), varptr(metafile), varptr(conversionFailureFlag), filename, emfType, description, varptr(out_metafile))
; refGraphics : GpGraphics* -> "sptr"
; metafile : GpMetafile* in/out -> "sptr"
; conversionFailureFlag : INT* in/out -> "sptr"
; filename : LPCWSTR -> "wstr"
; emfType : EmfType -> "int"
; description : LPCWSTR -> "wstr"
; out_metafile : GpMetafile** in/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 GdipConvertToEmfPlusToFile(GpGraphics* refGraphics, GpMetafile* metafile, INT* conversionFailureFlag, LPCWSTR filename, EmfType emfType, LPCWSTR description, GpMetafile** out_metafile)
#uselib "gdiplus.dll"
#cfunc global GdipConvertToEmfPlusToFile "GdipConvertToEmfPlusToFile" var, var, var, wstr, int, wstr, var
; res = GdipConvertToEmfPlusToFile(refGraphics, metafile, conversionFailureFlag, filename, emfType, description, out_metafile)
; refGraphics : GpGraphics* -> "var"
; metafile : GpMetafile* in/out -> "var"
; conversionFailureFlag : INT* in/out -> "var"
; filename : LPCWSTR -> "wstr"
; emfType : EmfType -> "int"
; description : LPCWSTR -> "wstr"
; out_metafile : GpMetafile** in/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 GdipConvertToEmfPlusToFile(GpGraphics* refGraphics, GpMetafile* metafile, INT* conversionFailureFlag, LPCWSTR filename, EmfType emfType, LPCWSTR description, GpMetafile** out_metafile)
#uselib "gdiplus.dll"
#cfunc global GdipConvertToEmfPlusToFile "GdipConvertToEmfPlusToFile" intptr, intptr, intptr, wstr, int, wstr, intptr
; res = GdipConvertToEmfPlusToFile(varptr(refGraphics), varptr(metafile), varptr(conversionFailureFlag), filename, emfType, description, varptr(out_metafile))
; refGraphics : GpGraphics* -> "intptr"
; metafile : GpMetafile* in/out -> "intptr"
; conversionFailureFlag : INT* in/out -> "intptr"
; filename : LPCWSTR -> "wstr"
; emfType : EmfType -> "int"
; description : LPCWSTR -> "wstr"
; out_metafile : GpMetafile** in/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")
	procGdipConvertToEmfPlusToFile = gdiplus.NewProc("GdipConvertToEmfPlusToFile")
)

// refGraphics (GpGraphics*), metafile (GpMetafile* in/out), conversionFailureFlag (INT* in/out), filename (LPCWSTR), emfType (EmfType), description (LPCWSTR), out_metafile (GpMetafile** in/out)
r1, _, err := procGdipConvertToEmfPlusToFile.Call(
	uintptr(refGraphics),
	uintptr(metafile),
	uintptr(conversionFailureFlag),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(filename))),
	uintptr(emfType),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(description))),
	uintptr(out_metafile),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipConvertToEmfPlusToFile(
  refGraphics: Pointer;   // GpGraphics*
  metafile: Pointer;   // GpMetafile* in/out
  conversionFailureFlag: Pointer;   // INT* in/out
  filename: PWideChar;   // LPCWSTR
  emfType: Integer;   // EmfType
  description: PWideChar;   // LPCWSTR
  out_metafile: Pointer   // GpMetafile** in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipConvertToEmfPlusToFile';

result := DllCall("gdiplus\GdipConvertToEmfPlusToFile"
    , "Ptr", refGraphics   ; GpGraphics*
    , "Ptr", metafile   ; GpMetafile* in/out
    , "Ptr", conversionFailureFlag   ; INT* in/out
    , "WStr", filename   ; LPCWSTR
    , "Int", emfType   ; EmfType
    , "WStr", description   ; LPCWSTR
    , "Ptr", out_metafile   ; GpMetafile** in/out
    , "Int")   ; return: Status

●GdipConvertToEmfPlusToFile(refGraphics, metafile, conversionFailureFlag, filename, emfType, description, out_metafile) = DLL("gdiplus.dll", "int GdipConvertToEmfPlusToFile(void*, void*, void*, char*, int, char*, void*)")
# 呼び出し: GdipConvertToEmfPlusToFile(refGraphics, metafile, conversionFailureFlag, filename, emfType, description, out_metafile)
# refGraphics : GpGraphics* -> "void*"
# metafile : GpMetafile* in/out -> "void*"
# conversionFailureFlag : INT* in/out -> "void*"
# filename : LPCWSTR -> "char*"
# emfType : EmfType -> "int"
# description : LPCWSTR -> "char*"
# out_metafile : GpMetafile** 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 "gdiplus" fn GdipConvertToEmfPlusToFile(
    refGraphics: [*c]GpGraphics, // GpGraphics*
    metafile: [*c]GpMetafile, // GpMetafile* in/out
    conversionFailureFlag: [*c]i32, // INT* in/out
    filename: [*c]const u16, // LPCWSTR
    emfType: i32, // EmfType
    description: [*c]const u16, // LPCWSTR
    out_metafile: [*c][*c]GpMetafile // GpMetafile** in/out
) callconv(std.os.windows.WINAPI) i32;

proc GdipConvertToEmfPlusToFile(
    refGraphics: ptr GpGraphics,  # GpGraphics*
    metafile: ptr GpMetafile,  # GpMetafile* in/out
    conversionFailureFlag: ptr int32,  # INT* in/out
    filename: WideCString,  # LPCWSTR
    emfType: int32,  # EmfType
    description: WideCString,  # LPCWSTR
    out_metafile: ptr GpMetafile  # GpMetafile** in/out
): int32 {.importc: "GdipConvertToEmfPlusToFile", stdcall, dynlib: "gdiplus.dll".}

pragma(lib, "gdiplus");
extern(Windows)
int GdipConvertToEmfPlusToFile(
    GpGraphics* refGraphics,   // GpGraphics*
    GpMetafile* metafile,   // GpMetafile* in/out
    int* conversionFailureFlag,   // INT* in/out
    const(wchar)* filename,   // LPCWSTR
    int emfType,   // EmfType
    const(wchar)* description,   // LPCWSTR
    GpMetafile** out_metafile   // GpMetafile** in/out
);

ccall((:GdipConvertToEmfPlusToFile, "gdiplus.dll"), stdcall, Int32,
      (Ptr{GpGraphics}, Ptr{GpMetafile}, Ptr{Int32}, Cwstring, Int32, Cwstring, Ptr{GpMetafile}),
      refGraphics, metafile, conversionFailureFlag, filename, emfType, description, out_metafile)
# refGraphics : GpGraphics* -> Ptr{GpGraphics}
# metafile : GpMetafile* in/out -> Ptr{GpMetafile}
# conversionFailureFlag : INT* in/out -> Ptr{Int32}
# filename : LPCWSTR -> Cwstring
# emfType : EmfType -> Int32
# description : LPCWSTR -> Cwstring
# out_metafile : GpMetafile** in/out -> Ptr{GpMetafile}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t GdipConvertToEmfPlusToFile(
    void* refGraphics,
    void* metafile,
    int32_t* conversionFailureFlag,
    const uint16_t* filename,
    int32_t emfType,
    const uint16_t* description,
    void* out_metafile);
]]
local gdiplus = ffi.load("gdiplus")
-- gdiplus.GdipConvertToEmfPlusToFile(refGraphics, metafile, conversionFailureFlag, filename, emfType, description, out_metafile)
-- refGraphics : GpGraphics*
-- metafile : GpMetafile* in/out
-- conversionFailureFlag : INT* in/out
-- filename : LPCWSTR
-- emfType : EmfType
-- description : LPCWSTR
-- out_metafile : GpMetafile** 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('gdiplus.dll');
const GdipConvertToEmfPlusToFile = lib.func('__stdcall', 'GdipConvertToEmfPlusToFile', 'int32_t', ['void *', 'void *', 'int32_t *', 'str16', 'int32_t', 'str16', 'void *']);
// GdipConvertToEmfPlusToFile(refGraphics, metafile, conversionFailureFlag, filename, emfType, description, out_metafile)
// refGraphics : GpGraphics* -> 'void *'
// metafile : GpMetafile* in/out -> 'void *'
// conversionFailureFlag : INT* in/out -> 'int32_t *'
// filename : LPCWSTR -> 'str16'
// emfType : EmfType -> 'int32_t'
// description : LPCWSTR -> 'str16'
// out_metafile : GpMetafile** in/out -> 'void *'
// 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("gdiplus.dll", {
  GdipConvertToEmfPlusToFile: { parameters: ["pointer", "pointer", "pointer", "buffer", "i32", "buffer", "pointer"], result: "i32" },
});
// lib.symbols.GdipConvertToEmfPlusToFile(refGraphics, metafile, conversionFailureFlag, filename, emfType, description, out_metafile)
// refGraphics : GpGraphics* -> "pointer"
// metafile : GpMetafile* in/out -> "pointer"
// conversionFailureFlag : INT* in/out -> "pointer"
// filename : LPCWSTR -> "buffer"
// emfType : EmfType -> "i32"
// description : LPCWSTR -> "buffer"
// out_metafile : GpMetafile** 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
int32_t GdipConvertToEmfPlusToFile(
    void* refGraphics,
    void* metafile,
    int32_t* conversionFailureFlag,
    const uint16_t* filename,
    int32_t emfType,
    const uint16_t* description,
    void* out_metafile);
C, "gdiplus.dll");
// $ffi->GdipConvertToEmfPlusToFile(refGraphics, metafile, conversionFailureFlag, filename, emfType, description, out_metafile);
// refGraphics : GpGraphics*
// metafile : GpMetafile* in/out
// conversionFailureFlag : INT* in/out
// filename : LPCWSTR
// emfType : EmfType
// description : LPCWSTR
// out_metafile : GpMetafile** 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 Gdiplus extends StdCallLibrary {
    Gdiplus INSTANCE = Native.load("gdiplus", Gdiplus.class);
    int GdipConvertToEmfPlusToFile(
        Pointer refGraphics,   // GpGraphics*
        Pointer metafile,   // GpMetafile* in/out
        IntByReference conversionFailureFlag,   // INT* in/out
        WString filename,   // LPCWSTR
        int emfType,   // EmfType
        WString description,   // LPCWSTR
        Pointer out_metafile   // GpMetafile** in/out
    );
}

@[Link("gdiplus")]
lib Libgdiplus
  fun GdipConvertToEmfPlusToFile = GdipConvertToEmfPlusToFile(
    refGraphics : GpGraphics*,   # GpGraphics*
    metafile : GpMetafile*,   # GpMetafile* in/out
    conversionFailureFlag : Int32*,   # INT* in/out
    filename : UInt16*,   # LPCWSTR
    emfType : Int32,   # EmfType
    description : UInt16*,   # LPCWSTR
    out_metafile : GpMetafile**   # GpMetafile** in/out
  ) : Int32
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 GdipConvertToEmfPlusToFileNative = Int32 Function(Pointer<Void>, Pointer<Void>, Pointer<Int32>, Pointer<Utf16>, Int32, Pointer<Utf16>, Pointer<Void>);
typedef GdipConvertToEmfPlusToFileDart = int Function(Pointer<Void>, Pointer<Void>, Pointer<Int32>, Pointer<Utf16>, int, Pointer<Utf16>, Pointer<Void>);
final GdipConvertToEmfPlusToFile = DynamicLibrary.open('gdiplus.dll')
    .lookupFunction<GdipConvertToEmfPlusToFileNative, GdipConvertToEmfPlusToFileDart>('GdipConvertToEmfPlusToFile');
// refGraphics : GpGraphics* -> Pointer<Void>
// metafile : GpMetafile* in/out -> Pointer<Void>
// conversionFailureFlag : INT* in/out -> Pointer<Int32>
// filename : LPCWSTR -> Pointer<Utf16>
// emfType : EmfType -> Int32
// description : LPCWSTR -> Pointer<Utf16>
// out_metafile : GpMetafile** in/out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function GdipConvertToEmfPlusToFile(
  refGraphics: Pointer;   // GpGraphics*
  metafile: Pointer;   // GpMetafile* in/out
  conversionFailureFlag: Pointer;   // INT* in/out
  filename: PWideChar;   // LPCWSTR
  emfType: Integer;   // EmfType
  description: PWideChar;   // LPCWSTR
  out_metafile: Pointer   // GpMetafile** in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipConvertToEmfPlusToFile';

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

foreign import stdcall safe "GdipConvertToEmfPlusToFile"
  c_GdipConvertToEmfPlusToFile :: Ptr () -> Ptr () -> Ptr Int32 -> CWString -> Int32 -> CWString -> Ptr () -> IO Int32
-- refGraphics : GpGraphics* -> Ptr ()
-- metafile : GpMetafile* in/out -> Ptr ()
-- conversionFailureFlag : INT* in/out -> Ptr Int32
-- filename : LPCWSTR -> CWString
-- emfType : EmfType -> Int32
-- description : LPCWSTR -> CWString
-- out_metafile : GpMetafile** in/out -> Ptr ()
-- 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 gdipconverttoemfplustofile =
  foreign "GdipConvertToEmfPlusToFile"
    ((ptr void) @-> (ptr void) @-> (ptr int32_t) @-> (ptr uint16_t) @-> int32_t @-> (ptr uint16_t) @-> (ptr void) @-> returning int32_t)
(* refGraphics : GpGraphics* -> (ptr void) *)
(* metafile : GpMetafile* in/out -> (ptr void) *)
(* conversionFailureFlag : INT* in/out -> (ptr int32_t) *)
(* filename : LPCWSTR -> (ptr uint16_t) *)
(* emfType : EmfType -> int32_t *)
(* description : LPCWSTR -> (ptr uint16_t) *)
(* out_metafile : GpMetafile** in/out -> (ptr void) *)
(* 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 gdiplus (t "gdiplus.dll"))
(cffi:use-foreign-library gdiplus)

(cffi:defcfun ("GdipConvertToEmfPlusToFile" gdip-convert-to-emf-plus-to-file :convention :stdcall) :int32
  (ref-graphics :pointer)   ; GpGraphics*
  (metafile :pointer)   ; GpMetafile* in/out
  (conversion-failure-flag :pointer)   ; INT* in/out
  (filename (:string :encoding :utf-16le))   ; LPCWSTR
  (emf-type :int32)   ; EmfType
  (description (:string :encoding :utf-16le))   ; LPCWSTR
  (out-metafile :pointer))   ; GpMetafile** in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $GdipConvertToEmfPlusToFile = Win32::API::More->new('gdiplus',
    'int GdipConvertToEmfPlusToFile(LPVOID refGraphics, LPVOID metafile, LPVOID conversionFailureFlag, LPCWSTR filename, int emfType, LPCWSTR description, LPVOID out_metafile)');
# my $ret = $GdipConvertToEmfPlusToFile->Call($refGraphics, $metafile, $conversionFailureFlag, $filename, $emfType, $description, $out_metafile);
# refGraphics : GpGraphics* -> LPVOID
# metafile : GpMetafile* in/out -> LPVOID
# conversionFailureFlag : INT* in/out -> LPVOID
# filename : LPCWSTR -> LPCWSTR
# emfType : EmfType -> int
# description : LPCWSTR -> LPCWSTR
# out_metafile : GpMetafile** 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。

GdipConvertToEmfPlusToFile

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