gzdoom/code/I_main.c

// Emacs style mode select   -*- C++ -*- 
//-----------------------------------------------------------------------------
//
// $Id:$
//
// Copyright (C) 1993-1996 by id Software, Inc.
//
// This source is available for distribution and/or modification
// only under the terms of the DOOM Source Code License as
// published by id Software. All rights reserved.
//
// The source is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
// for more details.
//
// $Log:$
//
// DESCRIPTION:
//	Main program, simply calls D_DoomMain high level loop.
//
//-----------------------------------------------------------------------------




#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include "resource.h"

#include <stdio.h>
#include <stdarg.h>

#include "m_argv.h"
#include "d_main.h"
#include "i_system.h"
#include "c_consol.h"

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);

// Will this work with something besides VC++?
extern int __argc;
extern char **__argv;

const char WinClassName[] = "ZDOOM WndClass";

HINSTANCE		g_hInst;
WNDCLASS		WndClass;
HWND			Window;
HINSTANCE		hInstance;
LONG			OemWidth, OemHeight;
LONG			WinWidth, WinHeight;
HFONT			OemFont;
HDC				WinDC;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE nothing, LPSTR cmdline, int nCmdShow)
{
	int wantHeight, wantWidth, height, width;
	RECT cRect;
	TEXTMETRIC metrics;

	g_hInst = hInstance;
	myargc = __argc;
	myargv = __argv;

#ifdef USEASM
	{
		// Disable write-protection of code segment
		// (from Win32 Demo Programming FAQ)
		DWORD OldRights;
		BYTE *pBaseOfImage = GetModuleHandle(0);
		IMAGE_OPTIONAL_HEADER *pHeader = (IMAGE_OPTIONAL_HEADER *)
			(pBaseOfImage + ((IMAGE_DOS_HEADER*)pBaseOfImage)->e_lfanew +
			sizeof(IMAGE_NT_SIGNATURE) + sizeof(IMAGE_FILE_HEADER));
		if (!VirtualProtect(pBaseOfImage+pHeader->BaseOfCode,pHeader->SizeOfCode,PAGE_READWRITE,&OldRights))
			I_FatalError ("Could not make code writable\n");
	}
#endif

	height = GetSystemMetrics (SM_CYFIXEDFRAME) * 2 +
			 GetSystemMetrics (SM_CYCAPTION) + 12 * 32;
	width  = GetSystemMetrics (SM_CXFIXEDFRAME) * 2 + 8 * 78;

	WndClass.style			= CS_OWNDC;
	WndClass.lpfnWndProc	= WndProc;
	WndClass.cbClsExtra		= 0;
	WndClass.cbWndExtra		= 0;
	WndClass.hInstance		= hInstance;
	WndClass.hIcon			= LoadIcon (hInstance, MAKEINTRESOURCE(IDI_ICON1));
	WndClass.hCursor		= LoadCursor (NULL, IDC_ARROW);
	WndClass.hbrBackground	= (HBRUSH)GetStockObject (BLACK_BRUSH);
	WndClass.lpszMenuName	= NULL;
	WndClass.lpszClassName	= (LPCTSTR)WinClassName;
	
	/* register this new class with Windoze */
	if (!RegisterClass((LPWNDCLASS)&WndClass))
		I_FatalError ("Could not register window class");
	
	/* create window */
	Window = CreateWindow((LPCTSTR)WinClassName,
			(LPCTSTR) "ZDOOM (" __DATE__ ")",
			WS_CAPTION | WS_OVERLAPPED | WS_MINIMIZEBOX | WS_SYSMENU,
			CW_USEDEFAULT, CW_USEDEFAULT, width, height,
			(HWND)   NULL,
			(HMENU)  NULL,
			(HANDLE) hInstance,
			NULL);

	if (!Window)
		I_FatalError ("Could not open window");

	WinDC = GetDC (Window);
	if (!WinDC)
		I_FatalError ("Could not obtain device context");

	OemFont = GetStockObject (OEM_FIXED_FONT);	// This should not fail
	SelectObject (WinDC, OemFont);

	GetTextMetrics (WinDC, &metrics);
	OemWidth = metrics.tmAveCharWidth;
	OemHeight = metrics.tmHeight;

	wantHeight = 32 * OemHeight;
	wantWidth = 78 * OemWidth;

	GetClientRect (Window, &cRect);

	if (wantHeight != cRect.bottom)
		height += wantHeight - cRect.bottom;
	if (wantWidth != cRect.right)
		width += wantWidth = cRect.right;

	SetWindowPos (Window, 0, 0, 0, width, height, SWP_NOMOVE|SWP_NOZORDER|SWP_SHOWWINDOW);
	GetClientRect (Window, &cRect);

	WinWidth = cRect.right;
	WinHeight = cRect.bottom;

	C_InitConsole (((WinWidth / OemWidth) + 2) * 8, (WinHeight / OemHeight) * 8, false);

	D_DoomMain ();

	return 0;
}