GdipFlattenPath

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

Status GdipFlattenPath(
    GpPath* path,
    Matrix* matrix,
    FLOAT flatness
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipFlattenPath(
    path As IntPtr,   ' GpPath* in/out
    ByRef matrix As IntPtr,   ' Matrix* in/out
    flatness As Single   ' FLOAT
) As Integer
End Function

' path : GpPath* in/out
' matrix : Matrix* in/out
' flatness : FLOAT
Declare PtrSafe Function GdipFlattenPath Lib "gdiplus" ( _
    ByVal path As LongPtr, _
    ByRef matrix As LongPtr, _
    ByVal flatness As Single) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GdipFlattenPath = ctypes.windll.gdiplus.GdipFlattenPath
GdipFlattenPath.restype = ctypes.c_int
GdipFlattenPath.argtypes = [
    ctypes.c_void_p,  # path : GpPath* in/out
    ctypes.c_void_p,  # matrix : Matrix* in/out
    ctypes.c_float,  # flatness : FLOAT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipFlattenPath = Fiddle::Function.new(
  lib['GdipFlattenPath'],
  [
    Fiddle::TYPE_VOIDP,  # path : GpPath* in/out
    Fiddle::TYPE_VOIDP,  # matrix : Matrix* in/out
    Fiddle::TYPE_FLOAT,  # flatness : FLOAT
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipFlattenPath(
        path: *mut GpPath,  // GpPath* in/out
        matrix: *mut isize,  // Matrix* in/out
        flatness: f32  // FLOAT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipFlattenPath(IntPtr path, ref IntPtr matrix, float flatness);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipFlattenPath' -Namespace Win32 -PassThru
# $api::GdipFlattenPath(path, matrix, flatness)

#uselib "gdiplus.dll"
#func global GdipFlattenPath "GdipFlattenPath" sptr, sptr, float
; GdipFlattenPath varptr(path), matrix, flatness   ; 戻り値は stat
; path : GpPath* in/out -> "sptr"
; matrix : Matrix* in/out -> "sptr"
; flatness : FLOAT -> "float"
; ※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 "gdiplus.dll"
#cfunc global GdipFlattenPath "GdipFlattenPath" var, int, float
; res = GdipFlattenPath(path, matrix, flatness)
; path : GpPath* in/out -> "var"
; matrix : Matrix* in/out -> "int"
; flatness : FLOAT -> "float"
; ※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 GdipFlattenPath(GpPath* path, Matrix* matrix, FLOAT flatness)
#uselib "gdiplus.dll"
#cfunc global GdipFlattenPath "GdipFlattenPath" var, int, float
; res = GdipFlattenPath(path, matrix, flatness)
; path : GpPath* in/out -> "var"
; matrix : Matrix* in/out -> "int"
; flatness : FLOAT -> "float"
; ※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。

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

var (
	gdiplus = windows.NewLazySystemDLL("gdiplus.dll")
	procGdipFlattenPath = gdiplus.NewProc("GdipFlattenPath")
)

// path (GpPath* in/out), matrix (Matrix* in/out), flatness (FLOAT)
r1, _, err := procGdipFlattenPath.Call(
	uintptr(path),
	uintptr(matrix),
	uintptr(math.Float32bits(flatness)),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status
// 注意: float/double 引数は proc.Call では XMM レジスタに渡せません。
// windows.SyscallN(proc.Addr(), math.Float64bits(x), ...) もしくは cgo を使用してください。

function GdipFlattenPath(
  path: Pointer;   // GpPath* in/out
  matrix: Pointer;   // Matrix* in/out
  flatness: Single   // FLOAT
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipFlattenPath';

result := DllCall("gdiplus\GdipFlattenPath"
    , "Ptr", path   ; GpPath* in/out
    , "Ptr", matrix   ; Matrix* in/out
    , "Float", flatness   ; FLOAT
    , "Int")   ; return: Status

●GdipFlattenPath(path, matrix, flatness) = DLL("gdiplus.dll", "int GdipFlattenPath(void*, void*, float)")
# 呼び出し: GdipFlattenPath(path, matrix, flatness)
# path : GpPath* in/out -> "void*"
# matrix : Matrix* in/out -> "void*"
# flatness : FLOAT -> "float"
# 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)。