glPixelZoom

関数

ピクセル描画時の拡大縮小率を設定する。

DLLOPENGL32.dll呼出規約winapi

シグネチャ

// OPENGL32.dll
#include <windows.h>

void glPixelZoom(
    FLOAT xfactor,
    FLOAT yfactor
);

パラメーター

名前	型	方向
xfactor	FLOAT	in
yfactor	FLOAT	in

戻り値の型: void

各言語での呼び出し定義

// OPENGL32.dll
#include <windows.h>

void glPixelZoom(
    FLOAT xfactor,
    FLOAT yfactor
);

[DllImport("OPENGL32.dll", ExactSpelling = true)]
static extern void glPixelZoom(
    float xfactor,   // FLOAT
    float yfactor   // FLOAT
);

<DllImport("OPENGL32.dll", ExactSpelling:=True)>
Public Shared Sub glPixelZoom(
    xfactor As Single,   ' FLOAT
    yfactor As Single   ' FLOAT
)
End Sub

' xfactor : FLOAT
' yfactor : FLOAT
Declare PtrSafe Sub glPixelZoom Lib "opengl32" ( _
    ByVal xfactor As Single, _
    ByVal yfactor As Single)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

glPixelZoom = ctypes.windll.opengl32.glPixelZoom
glPixelZoom.restype = None
glPixelZoom.argtypes = [
    ctypes.c_float,  # xfactor : FLOAT
    ctypes.c_float,  # yfactor : FLOAT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OPENGL32.dll')
glPixelZoom = Fiddle::Function.new(
  lib['glPixelZoom'],
  [
    Fiddle::TYPE_FLOAT,  # xfactor : FLOAT
    Fiddle::TYPE_FLOAT,  # yfactor : FLOAT
  ],
  Fiddle::TYPE_VOID)

#[link(name = "opengl32")]
extern "system" {
    fn glPixelZoom(
        xfactor: f32,  // FLOAT
        yfactor: f32  // FLOAT
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OPENGL32.dll")]
public static extern void glPixelZoom(float xfactor, float yfactor);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OPENGL32_glPixelZoom' -Namespace Win32 -PassThru
# $api::glPixelZoom(xfactor, yfactor)

#uselib "OPENGL32.dll"
#func global glPixelZoom "glPixelZoom" float, float
; glPixelZoom xfactor, yfactor
; xfactor : FLOAT -> "float"
; yfactor : FLOAT -> "float"

#uselib "OPENGL32.dll"
#func global glPixelZoom "glPixelZoom" float, float
; glPixelZoom xfactor, yfactor
; xfactor : FLOAT -> "float"
; yfactor : FLOAT -> "float"

; void glPixelZoom(FLOAT xfactor, FLOAT yfactor)
#uselib "OPENGL32.dll"
#func global glPixelZoom "glPixelZoom" float, float
; glPixelZoom xfactor, yfactor
; xfactor : FLOAT -> "float"
; yfactor : FLOAT -> "float"

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

var (
	opengl32 = windows.NewLazySystemDLL("OPENGL32.dll")
	procglPixelZoom = opengl32.NewProc("glPixelZoom")
)

// xfactor (FLOAT), yfactor (FLOAT)
r1, _, err := procglPixelZoom.Call(
	uintptr(math.Float32bits(xfactor)),
	uintptr(math.Float32bits(yfactor)),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void
// 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。

procedure glPixelZoom(
  xfactor: Single;   // FLOAT
  yfactor: Single   // FLOAT
); stdcall;
  external 'OPENGL32.dll' name 'glPixelZoom';

result := DllCall("OPENGL32\glPixelZoom"
    , "Float", xfactor   ; FLOAT
    , "Float", yfactor   ; FLOAT
    , "Int")   ; return: void

●glPixelZoom(xfactor, yfactor) = DLL("OPENGL32.dll", "int glPixelZoom(float, float)")
# 呼び出し: glPixelZoom(xfactor, yfactor)
# xfactor : FLOAT -> "float"
# yfactor : 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)。