glAccum

関数

アキュムレーションバッファに対して演算を行う。

DLLOPENGL32.dll呼出規約winapi

シグネチャ

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

void glAccum(
    DWORD op,
    FLOAT value
);

パラメーター

名前	型	方向
op	DWORD	in
value	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 glAccum(
    DWORD op,
    FLOAT value
);

[DllImport("OPENGL32.dll", ExactSpelling = true)]
static extern void glAccum(
    uint op,   // DWORD
    float value   // FLOAT
);

<DllImport("OPENGL32.dll", ExactSpelling:=True)>
Public Shared Sub glAccum(
    op As UInteger,   ' DWORD
    value As Single   ' FLOAT
)
End Sub

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

import ctypes
from ctypes import wintypes

glAccum = ctypes.windll.opengl32.glAccum
glAccum.restype = None
glAccum.argtypes = [
    wintypes.DWORD,  # op : DWORD
    ctypes.c_float,  # value : FLOAT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OPENGL32.dll')
glAccum = Fiddle::Function.new(
  lib['glAccum'],
  [
    -Fiddle::TYPE_INT,  # op : DWORD
    Fiddle::TYPE_FLOAT,  # value : FLOAT
  ],
  Fiddle::TYPE_VOID)

#[link(name = "opengl32")]
extern "system" {
    fn glAccum(
        op: u32,  // DWORD
        value: f32  // FLOAT
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OPENGL32.dll")]
public static extern void glAccum(uint op, float value);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OPENGL32_glAccum' -Namespace Win32 -PassThru
# $api::glAccum(op, value)

#uselib "OPENGL32.dll"
#func global glAccum "glAccum" sptr, float
; glAccum op, value
; op : DWORD -> "sptr"
; value : FLOAT -> "float"

#uselib "OPENGL32.dll"
#func global glAccum "glAccum" int, float
; glAccum op, value
; op : DWORD -> "int"
; value : FLOAT -> "float"

; void glAccum(DWORD op, FLOAT value)
#uselib "OPENGL32.dll"
#func global glAccum "glAccum" int, float
; glAccum op, value
; op : DWORD -> "int"
; value : FLOAT -> "float"

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

var (
	opengl32 = windows.NewLazySystemDLL("OPENGL32.dll")
	procglAccum = opengl32.NewProc("glAccum")
)

// op (DWORD), value (FLOAT)
r1, _, err := procglAccum.Call(
	uintptr(op),
	uintptr(math.Float32bits(value)),
)
_ = 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 glAccum(
  op: DWORD;   // DWORD
  value: Single   // FLOAT
); stdcall;
  external 'OPENGL32.dll' name 'glAccum';

result := DllCall("OPENGL32\glAccum"
    , "UInt", op   ; DWORD
    , "Float", value   ; FLOAT
    , "Int")   ; return: void

●glAccum(op, value) = DLL("OPENGL32.dll", "int glAccum(dword, float)")
# 呼び出し: glAccum(op, value)
# op : DWORD -> "dword"
# value : 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)。