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DWM_PRESENT_PARAMETERS

構造体
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サイズx64: 40 バイト / x86: 40 バイトパッキング1

サイズ=各フィールドのバイト数(x64/x86 で異なる場合は x64/x86 と併記)。x64/x86 列=フィールドのバイトオフセット(HSPで dupptr / lpoke / wpoke 等に使用)。

フィールド

フィールド型サイズx64x86説明
cbSizeDWORD4+0+0この構造体のサイズ(バイト数)。呼び出し前に設定する。
fQueueBOOL4+4+4Presentをキューに入れてスケジュールするかを示すブール値。
cRefreshStartULONGLONG8+8+8Present開始の基準となるリフレッシュカウント。
cBufferDWORD4+16+16使用するバッファ数。
fUseSourceRateBOOL4+20+20ソースのフレームレートを使用するかを示すブール値。
rateSourceUNSIGNED_RATIO8+24+24ソースのフレームレートを分数で表す値。
cRefreshesPerFrameDWORD4+32+321フレームあたりのリフレッシュ回数。
eSamplingDWM_SOURCE_FRAME_SAMPLING4+36+36ソースフレームのサンプリング方式を示す列挙値。

各言語での定義

#include <windows.h>

// UNSIGNED_RATIO  (x64 8 / x86 8 バイト)
#pragma pack(push, 1)
typedef struct UNSIGNED_RATIO {
    DWORD uiNumerator;
    DWORD uiDenominator;
} UNSIGNED_RATIO;
#pragma pack(pop)

// DWM_PRESENT_PARAMETERS  (x64 40 / x86 40 バイト)
#pragma pack(push, 1)
typedef struct DWM_PRESENT_PARAMETERS {
    DWORD cbSize;
    BOOL fQueue;
    ULONGLONG cRefreshStart;
    DWORD cBuffer;
    BOOL fUseSourceRate;
    UNSIGNED_RATIO rateSource;
    DWORD cRefreshesPerFrame;
    DWM_SOURCE_FRAME_SAMPLING eSampling;
} DWM_PRESENT_PARAMETERS;
#pragma pack(pop)
using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
public struct UNSIGNED_RATIO
{
    public uint uiNumerator;
    public uint uiDenominator;
}

[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
public struct DWM_PRESENT_PARAMETERS
{
    public uint cbSize;
    [MarshalAs(UnmanagedType.Bool)] public bool fQueue;
    public ulong cRefreshStart;
    public uint cBuffer;
    [MarshalAs(UnmanagedType.Bool)] public bool fUseSourceRate;
    public UNSIGNED_RATIO rateSource;
    public uint cRefreshesPerFrame;
    public int eSampling;
}
Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, Pack:=1, CharSet:=CharSet.Unicode)>
Public Structure UNSIGNED_RATIO
    Public uiNumerator As UInteger
    Public uiDenominator As UInteger
End Structure

<StructLayout(LayoutKind.Sequential, Pack:=1, CharSet:=CharSet.Unicode)>
Public Structure DWM_PRESENT_PARAMETERS
    Public cbSize As UInteger
    <MarshalAs(UnmanagedType.Bool)> Public fQueue As Boolean
    Public cRefreshStart As ULong
    Public cBuffer As UInteger
    <MarshalAs(UnmanagedType.Bool)> Public fUseSourceRate As Boolean
    Public rateSource As UNSIGNED_RATIO
    Public cRefreshesPerFrame As UInteger
    Public eSampling As Integer
End Structure
import ctypes
from ctypes import wintypes

class UNSIGNED_RATIO(ctypes.Structure):
    _pack_ = 1
    _fields_ = [
        ("uiNumerator", wintypes.DWORD),
        ("uiDenominator", wintypes.DWORD),
    ]

class DWM_PRESENT_PARAMETERS(ctypes.Structure):
    _pack_ = 1
    _fields_ = [
        ("cbSize", wintypes.DWORD),
        ("fQueue", wintypes.BOOL),
        ("cRefreshStart", ctypes.c_ulonglong),
        ("cBuffer", wintypes.DWORD),
        ("fUseSourceRate", wintypes.BOOL),
        ("rateSource", UNSIGNED_RATIO),
        ("cRefreshesPerFrame", wintypes.DWORD),
        ("eSampling", ctypes.c_int),
    ]
#[repr(C, packed(1))]
pub struct UNSIGNED_RATIO {
    pub uiNumerator: u32,
    pub uiDenominator: u32,
}

#[repr(C, packed(1))]
pub struct DWM_PRESENT_PARAMETERS {
    pub cbSize: u32,
    pub fQueue: i32,
    pub cRefreshStart: u64,
    pub cBuffer: u32,
    pub fUseSourceRate: i32,
    pub rateSource: UNSIGNED_RATIO,
    pub cRefreshesPerFrame: u32,
    pub eSampling: i32,
}
import "golang.org/x/sys/windows"

type UNSIGNED_RATIO struct {
	uiNumerator uint32
	uiDenominator uint32
}

type DWM_PRESENT_PARAMETERS struct {
	cbSize uint32
	fQueue int32
	cRefreshStart uint64
	cBuffer uint32
	fUseSourceRate int32
	rateSource UNSIGNED_RATIO
	cRefreshesPerFrame uint32
	eSampling int32
}
type
  UNSIGNED_RATIO = packed record
    uiNumerator: DWORD;
    uiDenominator: DWORD;
  end;

  DWM_PRESENT_PARAMETERS = packed record
    cbSize: DWORD;
    fQueue: BOOL;
    cRefreshStart: UInt64;
    cBuffer: DWORD;
    fUseSourceRate: BOOL;
    rateSource: UNSIGNED_RATIO;
    cRefreshesPerFrame: DWORD;
    eSampling: Integer;
  end;
const UNSIGNED_RATIO = extern struct {
    uiNumerator: u32,
    uiDenominator: u32,
};

const DWM_PRESENT_PARAMETERS = extern struct {
    cbSize: u32,
    fQueue: i32,
    cRefreshStart: u64,
    cBuffer: u32,
    fUseSourceRate: i32,
    rateSource: UNSIGNED_RATIO,
    cRefreshesPerFrame: u32,
    eSampling: i32,
};
type
  UNSIGNED_RATIO {.packed.} = object
    uiNumerator: uint32
    uiDenominator: uint32

  DWM_PRESENT_PARAMETERS {.packed.} = object
    cbSize: uint32
    fQueue: int32
    cRefreshStart: uint64
    cBuffer: uint32
    fUseSourceRate: int32
    rateSource: UNSIGNED_RATIO
    cRefreshesPerFrame: uint32
    eSampling: int32
align(1)
struct UNSIGNED_RATIO
{
    uint uiNumerator;
    uint uiDenominator;
}

align(1)
struct DWM_PRESENT_PARAMETERS
{
    uint cbSize;
    int fQueue;
    ulong cRefreshStart;
    uint cBuffer;
    int fUseSourceRate;
    UNSIGNED_RATIO rateSource;
    uint cRefreshesPerFrame;
    int eSampling;
}

HSP用 定義

HSP3.7/3.8 は構造体機能が無いため4byte整数配列(dim)+peek/poke で操作(32/64bitでサイズ・位置が異なる場合はタブで分割)。IronHSP は NSTRUCT(#defstruct/stdim/->)で32/64bit共通。

; HSP3.7/3.8 は構造体機能が無いため、4byte整数の配列変数で操作します。(x64 レイアウト)
; DWM_PRESENT_PARAMETERS サイズ: 40 バイト(x64)
dim st, 10    ; 4byte整数×10(構造体サイズ 40 / 4 切り上げ)
; cbSize : DWORD (+0, 4byte)  st.0 = 値  /  値 = st.0   (lpoke/lpeek も可)
; fQueue : BOOL (+4, 4byte)  st.1 = 値  /  値 = st.1   (lpoke/lpeek も可)
; cRefreshStart : ULONGLONG (+8, 8byte)  qpoke st,8,値 / qpeek(st,8)  ※IronHSPのみ。3.7/3.8は lpoke st,8,下位 : lpoke st,12,上位
; cBuffer : DWORD (+16, 4byte)  st.4 = 値  /  値 = st.4   (lpoke/lpeek も可)
; fUseSourceRate : BOOL (+20, 4byte)  st.5 = 値  /  値 = st.5   (lpoke/lpeek も可)
; rateSource : UNSIGNED_RATIO (+24, 8byte)  varptr(st)+24 を基点に操作(8byte:入れ子/配列)
; cRefreshesPerFrame : DWORD (+32, 4byte)  st.8 = 値  /  値 = st.8   (lpoke/lpeek も可)
; eSampling : DWM_SOURCE_FRAME_SAMPLING (+36, 4byte)  st.9 = 値  /  値 = st.9   (lpoke/lpeek も可)
; ※4byte境界の整数は添字 st.N(N=オフセット/4)で読み書き可。それ以外は peek/poke 系を使用。
; IronHSP は NSTRUCT(構造体)をサポート。32bit/64bit どちらでも同じコードで動作します。
; ※GUID・入れ子構造体はデフォルト型でないため、依存する #defstruct を先に定義(下記に同梱)。
#defstruct global UNSIGNED_RATIO, pack=1
    #field int uiNumerator
    #field int uiDenominator
#endstruct

#defstruct global DWM_PRESENT_PARAMETERS, pack=1
    #field int cbSize
    #field bool fQueue
    #field int64 cRefreshStart
    #field int cBuffer
    #field bool fUseSourceRate
    #field UNSIGNED_RATIO rateSource
    #field int cRefreshesPerFrame
    #field int eSampling
#endstruct

stdim st, DWM_PRESENT_PARAMETERS        ; NSTRUCT 変数を確保
st->cbSize = 100
mes "cbSize=" + st->cbSize