glBlendFunc

関数

色のブレンディングに用いる係数を設定する。

DLLOPENGL32.dll呼出規約winapi

シグネチャ

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

void glBlendFunc(
    DWORD sfactor,
    DWORD dfactor
);

パラメーター

名前	型	方向
sfactor	DWORD	in
dfactor	DWORD	in

戻り値の型: void

各言語での呼び出し定義

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

void glBlendFunc(
    DWORD sfactor,
    DWORD dfactor
);

[DllImport("OPENGL32.dll", ExactSpelling = true)]
static extern void glBlendFunc(
    uint sfactor,   // DWORD
    uint dfactor   // DWORD
);

<DllImport("OPENGL32.dll", ExactSpelling:=True)>
Public Shared Sub glBlendFunc(
    sfactor As UInteger,   ' DWORD
    dfactor As UInteger   ' DWORD
)
End Sub

' sfactor : DWORD
' dfactor : DWORD
Declare PtrSafe Sub glBlendFunc Lib "opengl32" ( _
    ByVal sfactor As Long, _
    ByVal dfactor As Long)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

glBlendFunc = ctypes.windll.opengl32.glBlendFunc
glBlendFunc.restype = None
glBlendFunc.argtypes = [
    wintypes.DWORD,  # sfactor : DWORD
    wintypes.DWORD,  # dfactor : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OPENGL32.dll')
glBlendFunc = Fiddle::Function.new(
  lib['glBlendFunc'],
  [
    -Fiddle::TYPE_INT,  # sfactor : DWORD
    -Fiddle::TYPE_INT,  # dfactor : DWORD
  ],
  Fiddle::TYPE_VOID)

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

$sig = @"
[DllImport("OPENGL32.dll")]
public static extern void glBlendFunc(uint sfactor, uint dfactor);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OPENGL32_glBlendFunc' -Namespace Win32 -PassThru
# $api::glBlendFunc(sfactor, dfactor)

#uselib "OPENGL32.dll"
#func global glBlendFunc "glBlendFunc" sptr, sptr
; glBlendFunc sfactor, dfactor
; sfactor : DWORD -> "sptr"
; dfactor : DWORD -> "sptr"

#uselib "OPENGL32.dll"
#func global glBlendFunc "glBlendFunc" int, int
; glBlendFunc sfactor, dfactor
; sfactor : DWORD -> "int"
; dfactor : DWORD -> "int"

; void glBlendFunc(DWORD sfactor, DWORD dfactor)
#uselib "OPENGL32.dll"
#func global glBlendFunc "glBlendFunc" int, int
; glBlendFunc sfactor, dfactor
; sfactor : DWORD -> "int"
; dfactor : DWORD -> "int"

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

var (
	opengl32 = windows.NewLazySystemDLL("OPENGL32.dll")
	procglBlendFunc = opengl32.NewProc("glBlendFunc")
)

// sfactor (DWORD), dfactor (DWORD)
r1, _, err := procglBlendFunc.Call(
	uintptr(sfactor),
	uintptr(dfactor),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure glBlendFunc(
  sfactor: DWORD;   // DWORD
  dfactor: DWORD   // DWORD
); stdcall;
  external 'OPENGL32.dll' name 'glBlendFunc';

result := DllCall("OPENGL32\glBlendFunc"
    , "UInt", sfactor   ; DWORD
    , "UInt", dfactor   ; DWORD
    , "Int")   ; return: void

●glBlendFunc(sfactor, dfactor) = DLL("OPENGL32.dll", "int glBlendFunc(dword, dword)")
# 呼び出し: glBlendFunc(sfactor, dfactor)
# sfactor : DWORD -> "dword"
# dfactor : DWORD -> "dword"
# 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)。