D2D1ConvertColorSpace

// d2d1.dll
#include <windows.h>

D2D1_COLOR_F D2D1ConvertColorSpace(
    D2D1_COLOR_SPACE sourceColorSpace,
    D2D1_COLOR_SPACE destinationColorSpace,
    const D2D1_COLOR_F* color
);

<DllImport("d2d1.dll", ExactSpelling:=True)>
Public Shared Function D2D1ConvertColorSpace(
    sourceColorSpace As Integer,   ' D2D1_COLOR_SPACE
    destinationColorSpace As Integer,   ' D2D1_COLOR_SPACE
    color As IntPtr   ' D2D1_COLOR_F*
) As D2D1_COLOR_F
End Function

' sourceColorSpace : D2D1_COLOR_SPACE
' destinationColorSpace : D2D1_COLOR_SPACE
' color : D2D1_COLOR_F*
Declare PtrSafe Function D2D1ConvertColorSpace Lib "d2d1" ( _
    ByVal sourceColorSpace As Long, _
    ByVal destinationColorSpace As Long, _
    ByVal color As LongPtr) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

D2D1ConvertColorSpace = ctypes.windll.d2d1.D2D1ConvertColorSpace
D2D1ConvertColorSpace.restype = ctypes.c_void_p
D2D1ConvertColorSpace.argtypes = [
    ctypes.c_int,  # sourceColorSpace : D2D1_COLOR_SPACE
    ctypes.c_int,  # destinationColorSpace : D2D1_COLOR_SPACE
    ctypes.c_void_p,  # color : D2D1_COLOR_F*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('d2d1.dll')
D2D1ConvertColorSpace = Fiddle::Function.new(
  lib['D2D1ConvertColorSpace'],
  [
    Fiddle::TYPE_INT,  # sourceColorSpace : D2D1_COLOR_SPACE
    Fiddle::TYPE_INT,  # destinationColorSpace : D2D1_COLOR_SPACE
    Fiddle::TYPE_VOIDP,  # color : D2D1_COLOR_F*
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "d2d1")]
extern "system" {
    fn D2D1ConvertColorSpace(
        sourceColorSpace: i32,  // D2D1_COLOR_SPACE
        destinationColorSpace: i32,  // D2D1_COLOR_SPACE
        color: *const D2D1_COLOR_F  // D2D1_COLOR_F*
    ) -> D2D1_COLOR_F;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("d2d1.dll")]
public static extern D2D1_COLOR_F D2D1ConvertColorSpace(int sourceColorSpace, int destinationColorSpace, IntPtr color);
"@
$api = Add-Type -MemberDefinition $sig -Name 'd2d1_D2D1ConvertColorSpace' -Namespace Win32 -PassThru
# $api::D2D1ConvertColorSpace(sourceColorSpace, destinationColorSpace, color)

#uselib "d2d1.dll"
#func global D2D1ConvertColorSpace "D2D1ConvertColorSpace" sptr, sptr, sptr
; D2D1ConvertColorSpace sourceColorSpace, destinationColorSpace, varptr(color)   ; 戻り値は stat
; sourceColorSpace : D2D1_COLOR_SPACE -> "sptr"
; destinationColorSpace : D2D1_COLOR_SPACE -> "sptr"
; color : D2D1_COLOR_F* -> "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 "d2d1.dll"
#cfunc global D2D1ConvertColorSpace "D2D1ConvertColorSpace" int, int, var
; res = D2D1ConvertColorSpace(sourceColorSpace, destinationColorSpace, color)
; sourceColorSpace : D2D1_COLOR_SPACE -> "int"
; destinationColorSpace : D2D1_COLOR_SPACE -> "int"
; color : D2D1_COLOR_F* -> "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。

; D2D1_COLOR_F D2D1ConvertColorSpace(D2D1_COLOR_SPACE sourceColorSpace, D2D1_COLOR_SPACE destinationColorSpace, D2D1_COLOR_F* color)
#uselib "d2d1.dll"
#cfunc global D2D1ConvertColorSpace "D2D1ConvertColorSpace" int, int, var
; res = D2D1ConvertColorSpace(sourceColorSpace, destinationColorSpace, color)
; sourceColorSpace : D2D1_COLOR_SPACE -> "int"
; destinationColorSpace : D2D1_COLOR_SPACE -> "int"
; color : D2D1_COLOR_F* -> "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。

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

var (
	d2d1 = windows.NewLazySystemDLL("d2d1.dll")
	procD2D1ConvertColorSpace = d2d1.NewProc("D2D1ConvertColorSpace")
)

// sourceColorSpace (D2D1_COLOR_SPACE), destinationColorSpace (D2D1_COLOR_SPACE), color (D2D1_COLOR_F*)
r1, _, err := procD2D1ConvertColorSpace.Call(
	uintptr(sourceColorSpace),
	uintptr(destinationColorSpace),
	uintptr(color),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // D2D1_COLOR_F

function D2D1ConvertColorSpace(
  sourceColorSpace: Integer;   // D2D1_COLOR_SPACE
  destinationColorSpace: Integer;   // D2D1_COLOR_SPACE
  color: Pointer   // D2D1_COLOR_F*
): D2D1_COLOR_F; stdcall;
  external 'd2d1.dll' name 'D2D1ConvertColorSpace';

result := DllCall("d2d1\D2D1ConvertColorSpace"
    , "Int", sourceColorSpace   ; D2D1_COLOR_SPACE
    , "Int", destinationColorSpace   ; D2D1_COLOR_SPACE
    , "Ptr", color   ; D2D1_COLOR_F*
    , "Ptr")   ; return: D2D1_COLOR_F

●D2D1ConvertColorSpace(sourceColorSpace, destinationColorSpace, color) = DLL("d2d1.dll", "void* D2D1ConvertColorSpace(int, int, void*)")
# 呼び出し: D2D1ConvertColorSpace(sourceColorSpace, destinationColorSpace, color)
# sourceColorSpace : D2D1_COLOR_SPACE -> "int"
# destinationColorSpace : D2D1_COLOR_SPACE -> "int"
# color : D2D1_COLOR_F* -> "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)。