glRectf

関数

単精度座標で塗りつぶし矩形を描画する。

DLLOPENGL32.dll呼出規約winapi

シグネチャ

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

void glRectf(
    FLOAT x1,
    FLOAT y1,
    FLOAT x2,
    FLOAT y2
);

パラメーター

名前	型	方向
x1	FLOAT	in
y1	FLOAT	in
x2	FLOAT	in
y2	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 glRectf(
    FLOAT x1,
    FLOAT y1,
    FLOAT x2,
    FLOAT y2
);

[DllImport("OPENGL32.dll", ExactSpelling = true)]
static extern void glRectf(
    float x1,   // FLOAT
    float y1,   // FLOAT
    float x2,   // FLOAT
    float y2   // FLOAT
);

<DllImport("OPENGL32.dll", ExactSpelling:=True)>
Public Shared Sub glRectf(
    x1 As Single,   ' FLOAT
    y1 As Single,   ' FLOAT
    x2 As Single,   ' FLOAT
    y2 As Single   ' FLOAT
)
End Sub

' x1 : FLOAT
' y1 : FLOAT
' x2 : FLOAT
' y2 : FLOAT
Declare PtrSafe Sub glRectf Lib "opengl32" ( _
    ByVal x1 As Single, _
    ByVal y1 As Single, _
    ByVal x2 As Single, _
    ByVal y2 As Single)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

glRectf = ctypes.windll.opengl32.glRectf
glRectf.restype = None
glRectf.argtypes = [
    ctypes.c_float,  # x1 : FLOAT
    ctypes.c_float,  # y1 : FLOAT
    ctypes.c_float,  # x2 : FLOAT
    ctypes.c_float,  # y2 : FLOAT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OPENGL32.dll')
glRectf = Fiddle::Function.new(
  lib['glRectf'],
  [
    Fiddle::TYPE_FLOAT,  # x1 : FLOAT
    Fiddle::TYPE_FLOAT,  # y1 : FLOAT
    Fiddle::TYPE_FLOAT,  # x2 : FLOAT
    Fiddle::TYPE_FLOAT,  # y2 : FLOAT
  ],
  Fiddle::TYPE_VOID)

#[link(name = "opengl32")]
extern "system" {
    fn glRectf(
        x1: f32,  // FLOAT
        y1: f32,  // FLOAT
        x2: f32,  // FLOAT
        y2: f32  // FLOAT
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OPENGL32.dll")]
public static extern void glRectf(float x1, float y1, float x2, float y2);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OPENGL32_glRectf' -Namespace Win32 -PassThru
# $api::glRectf(x1, y1, x2, y2)

#uselib "OPENGL32.dll"
#func global glRectf "glRectf" float, float, float, float
; glRectf x1, y1, x2, y2
; x1 : FLOAT -> "float"
; y1 : FLOAT -> "float"
; x2 : FLOAT -> "float"
; y2 : FLOAT -> "float"

#uselib "OPENGL32.dll"
#func global glRectf "glRectf" float, float, float, float
; glRectf x1, y1, x2, y2
; x1 : FLOAT -> "float"
; y1 : FLOAT -> "float"
; x2 : FLOAT -> "float"
; y2 : FLOAT -> "float"

; void glRectf(FLOAT x1, FLOAT y1, FLOAT x2, FLOAT y2)
#uselib "OPENGL32.dll"
#func global glRectf "glRectf" float, float, float, float
; glRectf x1, y1, x2, y2
; x1 : FLOAT -> "float"
; y1 : FLOAT -> "float"
; x2 : FLOAT -> "float"
; y2 : FLOAT -> "float"

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

var (
	opengl32 = windows.NewLazySystemDLL("OPENGL32.dll")
	procglRectf = opengl32.NewProc("glRectf")
)

// x1 (FLOAT), y1 (FLOAT), x2 (FLOAT), y2 (FLOAT)
r1, _, err := procglRectf.Call(
	uintptr(math.Float32bits(x1)),
	uintptr(math.Float32bits(y1)),
	uintptr(math.Float32bits(x2)),
	uintptr(math.Float32bits(y2)),
)
_ = 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 glRectf(
  x1: Single;   // FLOAT
  y1: Single;   // FLOAT
  x2: Single;   // FLOAT
  y2: Single   // FLOAT
); stdcall;
  external 'OPENGL32.dll' name 'glRectf';

result := DllCall("OPENGL32\glRectf"
    , "Float", x1   ; FLOAT
    , "Float", y1   ; FLOAT
    , "Float", x2   ; FLOAT
    , "Float", y2   ; FLOAT
    , "Int")   ; return: void

●glRectf(x1, y1, x2, y2) = DLL("OPENGL32.dll", "int glRectf(float, float, float, float)")
# 呼び出し: glRectf(x1, y1, x2, y2)
# x1 : FLOAT -> "float"
# y1 : FLOAT -> "float"
# x2 : FLOAT -> "float"
# y2 : 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)。