idzio/wnd.c: Add helper for message window creation

This commit is contained in:
Tau 2019-09-28 18:46:35 -04:00
parent 254fcf66e6
commit e050dd7837
3 changed files with 93 additions and 0 deletions

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@ -14,6 +14,8 @@ idzio_dll = shared_library(
'idzio.h', 'idzio.h',
'shifter.c', 'shifter.c',
'shifter.h', 'shifter.h',
'wnd.c',
'wnd.h',
'xi.c', 'xi.c',
'xi.h', 'xi.h',
], ],

86
idzio/wnd.c Normal file
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@ -0,0 +1,86 @@
#include <windows.h>
#include <assert.h>
#include <string.h>
#include "util/dprintf.h"
/* DirectInput requires a window for correct initialization (and also force
feedback), so this source file provides some utilities for creating a
generic message-only window. */
static LRESULT WINAPI idz_io_wnd_proc(
HWND hwnd,
UINT msg,
WPARAM wparam,
LPARAM lparam);
HRESULT idz_io_wnd_create(HINSTANCE inst, HWND *out)
{
HRESULT hr;
WNDCLASSEXW wcx;
ATOM atom;
HWND hwnd;
assert(inst != NULL); /* We are not an EXE */
assert(out != NULL);
*out = NULL;
memset(&wcx, 0, sizeof(wcx));
wcx.cbSize = sizeof(wcx);
wcx.lpfnWndProc = idz_io_wnd_proc;
wcx.hInstance = inst;
wcx.lpszClassName = L"IDZIO";
atom = RegisterClassExW(&wcx);
if (atom == 0) {
hr = HRESULT_FROM_WIN32(GetLastError());
dprintf("IDZIO: RegisterClassExW failed: %08x\n", (int) hr);
goto fail;
}
hwnd = CreateWindowExW(
0,
(wchar_t *) (intptr_t) atom,
L"",
0,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
HWND_MESSAGE,
NULL,
inst,
NULL);
if (hwnd == NULL) {
hr = HRESULT_FROM_WIN32(GetLastError());
dprintf("IDZIO: CreateWindowExW failed: %08x\n", (int) hr);
goto fail;
}
*out = hwnd;
return S_OK;
fail:
UnregisterClassW((wchar_t *) (intptr_t) atom, inst);
return hr;
}
static LRESULT WINAPI idz_io_wnd_proc(
HWND hwnd,
UINT msg,
WPARAM wparam,
LPARAM lparam)
{
switch (msg) {
default:
return DefWindowProcW(hwnd, msg, wparam, lparam);
}
}

5
idzio/wnd.h Normal file
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@ -0,0 +1,5 @@
#pragma once
#include <windows.h>
HRESULT idz_io_wnd_create(HINSTANCE inst, HWND *out);