68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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*/
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#pragma once
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#include <prewin.h>
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#include <Shlobj.h>
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#include <postwin.h>
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#include <exception>
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#include <string>
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#include <sstream>
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#include <iomanip>
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// Don't use WM_USER
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// Notifications from shim to parent; wParam = event id
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#define WM_TWAIN_EVENT (WM_USER + 1)
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// lParam is HWND
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#define TWAIN_EVENT_NOTIFYHWND 0
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// lParam is result (bool indicating success)
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#define TWAIN_EVENT_REQUESTRESULT 1
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// lParam is ignored
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#define TWAIN_EVENT_NONE 10
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#define TWAIN_EVENT_QUIT 11
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#define TWAIN_EVENT_SCANNING 12
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// lParam is HANDLE to shared file mapping valid in context of parent process
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#define TWAIN_EVENT_XFER 13
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// Requests from parent to shim; wParam = request id
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#define WM_TWAIN_REQUEST (WM_USER + 2)
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#define TWAIN_REQUEST_QUIT 0 // Destroy()
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#define TWAIN_REQUEST_SELECTSOURCE 1
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#define TWAIN_REQUEST_INITXFER 2
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// messages starting from this are not to be used for interprocess communications
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#define WM_SHIM_INTERNAL (WM_USER + 200)
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template <typename IntType> std::string Num2Hex(IntType n)
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{
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std::stringstream sMsg;
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sMsg << "0x" << std::uppercase << std::setfill('0') << std::setw(sizeof(n) * 2) << std::hex
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<< n;
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return sMsg.str();
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}
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void ThrowWin32Error(const char* sFunc, DWORD nWin32Error)
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{
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std::stringstream sMsg;
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sMsg << sFunc << " failed with Win32 error code " << Num2Hex(nWin32Error) << "!";
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throw std::exception(sMsg.str().c_str());
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}
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void ThrowLastError(const char* sFunc) { ThrowWin32Error(sFunc, GetLastError()); }
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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