GdipBitmapGetPixel

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

Status GdipBitmapGetPixel(
    GpBitmap* bitmap,
    INT x,
    INT y,
    DWORD* color
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipBitmapGetPixel(
    bitmap As IntPtr,   ' GpBitmap* in/out
    x As Integer,   ' INT
    y As Integer,   ' INT
    ByRef color As UInteger   ' DWORD* in/out
) As Integer
End Function

' bitmap : GpBitmap* in/out
' x : INT
' y : INT
' color : DWORD* in/out
Declare PtrSafe Function GdipBitmapGetPixel Lib "gdiplus" ( _
    ByVal bitmap As LongPtr, _
    ByVal x As Long, _
    ByVal y As Long, _
    ByRef color 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

GdipBitmapGetPixel = ctypes.windll.gdiplus.GdipBitmapGetPixel
GdipBitmapGetPixel.restype = ctypes.c_int
GdipBitmapGetPixel.argtypes = [
    ctypes.c_void_p,  # bitmap : GpBitmap* in/out
    ctypes.c_int,  # x : INT
    ctypes.c_int,  # y : INT
    ctypes.POINTER(wintypes.DWORD),  # color : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipBitmapGetPixel = Fiddle::Function.new(
  lib['GdipBitmapGetPixel'],
  [
    Fiddle::TYPE_VOIDP,  # bitmap : GpBitmap* in/out
    Fiddle::TYPE_INT,  # x : INT
    Fiddle::TYPE_INT,  # y : INT
    Fiddle::TYPE_VOIDP,  # color : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipBitmapGetPixel(
        bitmap: *mut GpBitmap,  // GpBitmap* in/out
        x: i32,  // INT
        y: i32,  // INT
        color: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipBitmapGetPixel(IntPtr bitmap, int x, int y, ref uint color);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipBitmapGetPixel' -Namespace Win32 -PassThru
# $api::GdipBitmapGetPixel(bitmap, x, y, color)

#uselib "gdiplus.dll"
#func global GdipBitmapGetPixel "GdipBitmapGetPixel" sptr, sptr, sptr, sptr
; GdipBitmapGetPixel varptr(bitmap), x, y, varptr(color)   ; 戻り値は stat
; bitmap : GpBitmap* in/out -> "sptr"
; x : INT -> "sptr"
; y : INT -> "sptr"
; color : DWORD* 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。

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

var (
	gdiplus = windows.NewLazySystemDLL("gdiplus.dll")
	procGdipBitmapGetPixel = gdiplus.NewProc("GdipBitmapGetPixel")
)

// bitmap (GpBitmap* in/out), x (INT), y (INT), color (DWORD* in/out)
r1, _, err := procGdipBitmapGetPixel.Call(
	uintptr(bitmap),
	uintptr(x),
	uintptr(y),
	uintptr(color),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipBitmapGetPixel(
  bitmap: Pointer;   // GpBitmap* in/out
  x: Integer;   // INT
  y: Integer;   // INT
  color: Pointer   // DWORD* in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipBitmapGetPixel';

result := DllCall("gdiplus\GdipBitmapGetPixel"
    , "Ptr", bitmap   ; GpBitmap* in/out
    , "Int", x   ; INT
    , "Int", y   ; INT
    , "Ptr", color   ; DWORD* in/out
    , "Int")   ; return: Status

●GdipBitmapGetPixel(bitmap, x, y, color) = DLL("gdiplus.dll", "int GdipBitmapGetPixel(void*, int, int, void*)")
# 呼び出し: GdipBitmapGetPixel(bitmap, x, y, color)
# bitmap : GpBitmap* in/out -> "void*"
# x : INT -> "int"
# y : INT -> "int"
# color : DWORD* 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 GdipBitmapGetPixel(
    bitmap: [*c]GpBitmap, // GpBitmap* in/out
    x: i32, // INT
    y: i32, // INT
    color: [*c]u32 // DWORD* in/out
) callconv(std.os.windows.WINAPI) i32;

proc GdipBitmapGetPixel(
    bitmap: ptr GpBitmap,  # GpBitmap* in/out
    x: int32,  # INT
    y: int32,  # INT
    color: ptr uint32  # DWORD* in/out
): int32 {.importc: "GdipBitmapGetPixel", stdcall, dynlib: "gdiplus.dll".}

pragma(lib, "gdiplus");
extern(Windows)
int GdipBitmapGetPixel(
    GpBitmap* bitmap,   // GpBitmap* in/out
    int x,   // INT
    int y,   // INT
    uint* color   // DWORD* in/out
);

ccall((:GdipBitmapGetPixel, "gdiplus.dll"), stdcall, Int32,
      (Ptr{GpBitmap}, Int32, Int32, Ptr{UInt32}),
      bitmap, x, y, color)
# bitmap : GpBitmap* in/out -> Ptr{GpBitmap}
# x : INT -> Int32
# y : INT -> Int32
# color : DWORD* in/out -> Ptr{UInt32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t GdipBitmapGetPixel(
    void* bitmap,
    int32_t x,
    int32_t y,
    uint32_t* color);
]]
local gdiplus = ffi.load("gdiplus")
-- gdiplus.GdipBitmapGetPixel(bitmap, x, y, color)
-- bitmap : GpBitmap* in/out
-- x : INT
-- y : INT
-- color : DWORD* 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 GdipBitmapGetPixel = lib.func('__stdcall', 'GdipBitmapGetPixel', 'int32_t', ['void *', 'int32_t', 'int32_t', 'uint32_t *']);
// GdipBitmapGetPixel(bitmap, x, y, color)
// bitmap : GpBitmap* in/out -> 'void *'
// x : INT -> 'int32_t'
// y : INT -> 'int32_t'
// color : DWORD* in/out -> 'uint32_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", {
  GdipBitmapGetPixel: { parameters: ["pointer", "i32", "i32", "pointer"], result: "i32" },
});
// lib.symbols.GdipBitmapGetPixel(bitmap, x, y, color)
// bitmap : GpBitmap* in/out -> "pointer"
// x : INT -> "i32"
// y : INT -> "i32"
// color : DWORD* 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 GdipBitmapGetPixel(
    void* bitmap,
    int32_t x,
    int32_t y,
    uint32_t* color);
C, "gdiplus.dll");
// $ffi->GdipBitmapGetPixel(bitmap, x, y, color);
// bitmap : GpBitmap* in/out
// x : INT
// y : INT
// color : DWORD* 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 GdipBitmapGetPixel(
        Pointer bitmap,   // GpBitmap* in/out
        int x,   // INT
        int y,   // INT
        IntByReference color   // DWORD* in/out
    );
}

@[Link("gdiplus")]
lib Libgdiplus
  fun GdipBitmapGetPixel = GdipBitmapGetPixel(
    bitmap : GpBitmap*,   # GpBitmap* in/out
    x : Int32,   # INT
    y : Int32,   # INT
    color : UInt32*   # DWORD* 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 GdipBitmapGetPixelNative = Int32 Function(Pointer<Void>, Int32, Int32, Pointer<Uint32>);
typedef GdipBitmapGetPixelDart = int Function(Pointer<Void>, int, int, Pointer<Uint32>);
final GdipBitmapGetPixel = DynamicLibrary.open('gdiplus.dll')
    .lookupFunction<GdipBitmapGetPixelNative, GdipBitmapGetPixelDart>('GdipBitmapGetPixel');
// bitmap : GpBitmap* in/out -> Pointer<Void>
// x : INT -> Int32
// y : INT -> Int32
// color : DWORD* in/out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function GdipBitmapGetPixel(
  bitmap: Pointer;   // GpBitmap* in/out
  x: Integer;   // INT
  y: Integer;   // INT
  color: Pointer   // DWORD* in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipBitmapGetPixel';

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

foreign import stdcall safe "GdipBitmapGetPixel"
  c_GdipBitmapGetPixel :: Ptr () -> Int32 -> Int32 -> Ptr Word32 -> IO Int32
-- bitmap : GpBitmap* in/out -> Ptr ()
-- x : INT -> Int32
-- y : INT -> Int32
-- color : DWORD* in/out -> Ptr Word32
-- 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 gdipbitmapgetpixel =
  foreign "GdipBitmapGetPixel"
    ((ptr void) @-> int32_t @-> int32_t @-> (ptr uint32_t) @-> returning int32_t)
(* bitmap : GpBitmap* in/out -> (ptr void) *)
(* x : INT -> int32_t *)
(* y : INT -> int32_t *)
(* color : DWORD* in/out -> (ptr uint32_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 ("GdipBitmapGetPixel" gdip-bitmap-get-pixel :convention :stdcall) :int32
  (bitmap :pointer)   ; GpBitmap* in/out
  (x :int32)   ; INT
  (y :int32)   ; INT
  (color :pointer))   ; DWORD* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $GdipBitmapGetPixel = Win32::API::More->new('gdiplus',
    'int GdipBitmapGetPixel(LPVOID bitmap, int x, int y, LPVOID color)');
# my $ret = $GdipBitmapGetPixel->Call($bitmap, $x, $y, $color);
# bitmap : GpBitmap* in/out -> LPVOID
# x : INT -> int
# y : INT -> int
# color : DWORD* 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。