GdipSetLineBlend

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

Status GdipSetLineBlend(
    GpLineGradient* brush,
    const FLOAT* blend,
    const FLOAT* positions,
    INT count
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipSetLineBlend(
    brush As IntPtr,   ' GpLineGradient* in/out
    ByRef blend As Single,   ' FLOAT*
    ByRef positions As Single,   ' FLOAT*
    count As Integer   ' INT
) As Integer
End Function

' brush : GpLineGradient* in/out
' blend : FLOAT*
' positions : FLOAT*
' count : INT
Declare PtrSafe Function GdipSetLineBlend Lib "gdiplus" ( _
    ByVal brush As LongPtr, _
    ByRef blend As Single, _
    ByRef positions As Single, _
    ByVal count 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

GdipSetLineBlend = ctypes.windll.gdiplus.GdipSetLineBlend
GdipSetLineBlend.restype = ctypes.c_int
GdipSetLineBlend.argtypes = [
    ctypes.c_void_p,  # brush : GpLineGradient* in/out
    ctypes.POINTER(ctypes.c_float),  # blend : FLOAT*
    ctypes.POINTER(ctypes.c_float),  # positions : FLOAT*
    ctypes.c_int,  # count : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipSetLineBlend = Fiddle::Function.new(
  lib['GdipSetLineBlend'],
  [
    Fiddle::TYPE_VOIDP,  # brush : GpLineGradient* in/out
    Fiddle::TYPE_VOIDP,  # blend : FLOAT*
    Fiddle::TYPE_VOIDP,  # positions : FLOAT*
    Fiddle::TYPE_INT,  # count : INT
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipSetLineBlend(
        brush: *mut GpLineGradient,  // GpLineGradient* in/out
        blend: *const f32,  // FLOAT*
        positions: *const f32,  // FLOAT*
        count: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipSetLineBlend(IntPtr brush, ref float blend, ref float positions, int count);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipSetLineBlend' -Namespace Win32 -PassThru
# $api::GdipSetLineBlend(brush, blend, positions, count)

#uselib "gdiplus.dll"
#func global GdipSetLineBlend "GdipSetLineBlend" sptr, sptr, sptr, sptr
; GdipSetLineBlend varptr(brush), varptr(blend), varptr(positions), count   ; 戻り値は stat
; brush : GpLineGradient* in/out -> "sptr"
; blend : FLOAT* -> "sptr"
; positions : FLOAT* -> "sptr"
; count : INT -> "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。

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

var (
	gdiplus = windows.NewLazySystemDLL("gdiplus.dll")
	procGdipSetLineBlend = gdiplus.NewProc("GdipSetLineBlend")
)

// brush (GpLineGradient* in/out), blend (FLOAT*), positions (FLOAT*), count (INT)
r1, _, err := procGdipSetLineBlend.Call(
	uintptr(brush),
	uintptr(blend),
	uintptr(positions),
	uintptr(count),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipSetLineBlend(
  brush: Pointer;   // GpLineGradient* in/out
  blend: Pointer;   // FLOAT*
  positions: Pointer;   // FLOAT*
  count: Integer   // INT
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipSetLineBlend';

result := DllCall("gdiplus\GdipSetLineBlend"
    , "Ptr", brush   ; GpLineGradient* in/out
    , "Ptr", blend   ; FLOAT*
    , "Ptr", positions   ; FLOAT*
    , "Int", count   ; INT
    , "Int")   ; return: Status

●GdipSetLineBlend(brush, blend, positions, count) = DLL("gdiplus.dll", "int GdipSetLineBlend(void*, void*, void*, int)")
# 呼び出し: GdipSetLineBlend(brush, blend, positions, count)
# brush : GpLineGradient* in/out -> "void*"
# blend : FLOAT* -> "void*"
# positions : FLOAT* -> "void*"
# count : INT -> "int"
# 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 GdipSetLineBlend(
    brush: [*c]GpLineGradient, // GpLineGradient* in/out
    blend: [*c]f32, // FLOAT*
    positions: [*c]f32, // FLOAT*
    count: i32 // INT
) callconv(std.os.windows.WINAPI) i32;

proc GdipSetLineBlend(
    brush: ptr GpLineGradient,  # GpLineGradient* in/out
    blend: ptr float32,  # FLOAT*
    positions: ptr float32,  # FLOAT*
    count: int32  # INT
): int32 {.importc: "GdipSetLineBlend", stdcall, dynlib: "gdiplus.dll".}

pragma(lib, "gdiplus");
extern(Windows)
int GdipSetLineBlend(
    GpLineGradient* brush,   // GpLineGradient* in/out
    float* blend,   // FLOAT*
    float* positions,   // FLOAT*
    int count   // INT
);

ccall((:GdipSetLineBlend, "gdiplus.dll"), stdcall, Int32,
      (Ptr{GpLineGradient}, Ptr{Float32}, Ptr{Float32}, Int32),
      brush, blend, positions, count)
# brush : GpLineGradient* in/out -> Ptr{GpLineGradient}
# blend : FLOAT* -> Ptr{Float32}
# positions : FLOAT* -> Ptr{Float32}
# count : INT -> Int32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t GdipSetLineBlend(
    void* brush,
    float* blend,
    float* positions,
    int32_t count);
]]
local gdiplus = ffi.load("gdiplus")
-- gdiplus.GdipSetLineBlend(brush, blend, positions, count)
-- brush : GpLineGradient* in/out
-- blend : FLOAT*
-- positions : FLOAT*
-- count : INT
-- 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 GdipSetLineBlend = lib.func('__stdcall', 'GdipSetLineBlend', 'int32_t', ['void *', 'float *', 'float *', 'int32_t']);
// GdipSetLineBlend(brush, blend, positions, count)
// brush : GpLineGradient* in/out -> 'void *'
// blend : FLOAT* -> 'float *'
// positions : FLOAT* -> 'float *'
// count : INT -> 'int32_t'
// 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", {
  GdipSetLineBlend: { parameters: ["pointer", "pointer", "pointer", "i32"], result: "i32" },
});
// lib.symbols.GdipSetLineBlend(brush, blend, positions, count)
// brush : GpLineGradient* in/out -> "pointer"
// blend : FLOAT* -> "pointer"
// positions : FLOAT* -> "pointer"
// count : INT -> "i32"
// 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 GdipSetLineBlend(
    void* brush,
    float* blend,
    float* positions,
    int32_t count);
C, "gdiplus.dll");
// $ffi->GdipSetLineBlend(brush, blend, positions, count);
// brush : GpLineGradient* in/out
// blend : FLOAT*
// positions : FLOAT*
// count : INT
// 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 GdipSetLineBlend(
        Pointer brush,   // GpLineGradient* in/out
        FloatByReference blend,   // FLOAT*
        FloatByReference positions,   // FLOAT*
        int count   // INT
    );
}

@[Link("gdiplus")]
lib Libgdiplus
  fun GdipSetLineBlend = GdipSetLineBlend(
    brush : GpLineGradient*,   # GpLineGradient* in/out
    blend : Float32*,   # FLOAT*
    positions : Float32*,   # FLOAT*
    count : Int32   # INT
  ) : 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 GdipSetLineBlendNative = Int32 Function(Pointer<Void>, Pointer<Float>, Pointer<Float>, Int32);
typedef GdipSetLineBlendDart = int Function(Pointer<Void>, Pointer<Float>, Pointer<Float>, int);
final GdipSetLineBlend = DynamicLibrary.open('gdiplus.dll')
    .lookupFunction<GdipSetLineBlendNative, GdipSetLineBlendDart>('GdipSetLineBlend');
// brush : GpLineGradient* in/out -> Pointer<Void>
// blend : FLOAT* -> Pointer<Float>
// positions : FLOAT* -> Pointer<Float>
// count : INT -> Int32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function GdipSetLineBlend(
  brush: Pointer;   // GpLineGradient* in/out
  blend: Pointer;   // FLOAT*
  positions: Pointer;   // FLOAT*
  count: Integer   // INT
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipSetLineBlend';

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

foreign import stdcall safe "GdipSetLineBlend"
  c_GdipSetLineBlend :: Ptr () -> Ptr CFloat -> Ptr CFloat -> Int32 -> IO Int32
-- brush : GpLineGradient* in/out -> Ptr ()
-- blend : FLOAT* -> Ptr CFloat
-- positions : FLOAT* -> Ptr CFloat
-- count : INT -> Int32
-- 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 gdipsetlineblend =
  foreign "GdipSetLineBlend"
    ((ptr void) @-> (ptr float) @-> (ptr float) @-> int32_t @-> returning int32_t)
(* brush : GpLineGradient* in/out -> (ptr void) *)
(* blend : FLOAT* -> (ptr float) *)
(* positions : FLOAT* -> (ptr float) *)
(* count : INT -> int32_t *)
(* 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 ("GdipSetLineBlend" gdip-set-line-blend :convention :stdcall) :int32
  (brush :pointer)   ; GpLineGradient* in/out
  (blend :pointer)   ; FLOAT*
  (positions :pointer)   ; FLOAT*
  (count :int32))   ; INT
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $GdipSetLineBlend = Win32::API::More->new('gdiplus',
    'int GdipSetLineBlend(LPVOID brush, LPVOID blend, LPVOID positions, int count)');
# my $ret = $GdipSetLineBlend->Call($brush, $blend, $positions, $count);
# brush : GpLineGradient* in/out -> LPVOID
# blend : FLOAT* -> LPVOID
# positions : FLOAT* -> LPVOID
# count : INT -> int
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。