--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/video/win32.c	Sat Jul 23 15:16:57 2005 +0000
@@ -0,0 +1,800 @@
+#include "stdafx.h"
+#include "openttd.h"
+#include "functions.h"
+#include "gfx.h"
+#include "macros.h"
+#include "network.h"
+#include "variables.h"
+#include "window.h"
+#include "video/win32.h"
+#include <windows.h>
+
+static struct {
+	HWND main_wnd;
+	HBITMAP dib_sect;
+	Pixel *bitmap_bits;
+	Pixel *buffer_bits;
+	Pixel *alloced_bits;
+	HPALETTE gdi_palette;
+	int width,height;
+	int width_org, height_org;
+	bool cursor_visible;
+	bool switch_driver;
+	bool fullscreen;
+	bool double_size;
+	bool has_focus;
+	bool running;
+} _wnd;
+
+static void MakePalette(void)
+{
+	LOGPALETTE *pal;
+	uint i;
+
+	pal = alloca(sizeof(LOGPALETTE) + (256-1) * sizeof(PALETTEENTRY));
+
+	pal->palVersion = 0x300;
+	pal->palNumEntries = 256;
+
+	for (i = 0; i != 256; i++) {
+		pal->palPalEntry[i].peRed   = _cur_palette[i].r;
+		pal->palPalEntry[i].peGreen = _cur_palette[i].g;
+		pal->palPalEntry[i].peBlue  = _cur_palette[i].b;
+		pal->palPalEntry[i].peFlags = 0;
+
+	}
+	_wnd.gdi_palette = CreatePalette(pal);
+	if (_wnd.gdi_palette == NULL)
+		error("CreatePalette failed!\n");
+}
+
+static void UpdatePalette(HDC dc, uint start, uint count)
+{
+	RGBQUAD rgb[256];
+	uint i;
+
+	for (i = 0; i != count; i++) {
+		rgb[i].rgbRed   = _cur_palette[start + i].r;
+		rgb[i].rgbGreen = _cur_palette[start + i].g;
+		rgb[i].rgbBlue  = _cur_palette[start + i].b;
+		rgb[i].rgbReserved = 0;
+	}
+
+	SetDIBColorTable(dc, start, count, rgb);
+}
+
+bool MyShowCursor(bool show)
+{
+	if (_wnd.cursor_visible == show)
+		return show;
+
+	_wnd.cursor_visible = show;
+	ShowCursor(show);
+
+	return !show;
+}
+
+typedef struct {
+	byte vk_from;
+	byte vk_count;
+	byte map_to;
+} VkMapping;
+
+#define AS(x, z) {x, 0, z}
+#define AM(x, y, z, w) {x, y - x, z}
+
+#ifndef VK_OEM_3
+#define VK_OEM_3 0xC0
+#endif
+
+static const VkMapping _vk_mapping[] = {
+	// Pageup stuff + up/down
+	AM(VK_PRIOR,VK_DOWN, WKC_PAGEUP, WKC_DOWN),
+	// Map letters & digits
+	AM('A','Z','A','Z'),
+	AM('0','9','0','9'),
+
+	AS(VK_ESCAPE,		WKC_ESC),
+	AS(VK_PAUSE, WKC_PAUSE),
+	AS(VK_BACK,			WKC_BACKSPACE),
+	AM(VK_INSERT,VK_DELETE,WKC_INSERT, WKC_DELETE),
+
+	AS(VK_SPACE,		WKC_SPACE),
+	AS(VK_RETURN,		WKC_RETURN),
+	AS(VK_TAB,			WKC_TAB),
+
+	// Function keys
+	AM(VK_F1, VK_F12,	WKC_F1, WKC_F12),
+
+	// Numeric part.
+	// What is the virtual keycode for numeric enter??
+	AM(VK_NUMPAD0,VK_NUMPAD9, WKC_NUM_0, WKC_NUM_9),
+	AS(VK_DIVIDE,			WKC_NUM_DIV),
+	AS(VK_MULTIPLY,		WKC_NUM_MUL),
+	AS(VK_SUBTRACT,		WKC_NUM_MINUS),
+	AS(VK_ADD,				WKC_NUM_PLUS),
+	AS(VK_DECIMAL,		WKC_NUM_DECIMAL)
+};
+
+static uint MapWindowsKey(uint sym)
+{
+	const VkMapping *map;
+	uint key = 0;
+
+	for (map = _vk_mapping; map != endof(_vk_mapping); ++map) {
+		if ((uint)(sym - map->vk_from) <= map->vk_count) {
+			key = sym - map->vk_from + map->map_to;
+			break;
+		}
+	}
+
+	if (GetAsyncKeyState(VK_SHIFT)   < 0) key |= WKC_SHIFT;
+	if (GetAsyncKeyState(VK_CONTROL) < 0) key |= WKC_CTRL;
+	if (GetAsyncKeyState(VK_MENU)    < 0) key |= WKC_ALT;
+	return key;
+}
+
+static void MakeWindow(bool full_screen);
+static bool AllocateDibSection(int w, int h);
+
+static void ClientSizeChanged(int w, int h)
+{
+	if (_wnd.double_size) {
+		w /= 2;
+		h /= 2;
+	}
+
+	// allocate new dib section of the new size
+	if (AllocateDibSection(w, h)) {
+		// mark all palette colors dirty
+		_pal_first_dirty = 0;
+		_pal_last_dirty = 255;
+		GameSizeChanged();
+
+		// redraw screen
+		if (_wnd.running) {
+			_screen.dst_ptr = _wnd.buffer_bits;
+			UpdateWindows();
+		}
+	}
+}
+
+extern void DoExitSave(void);
+
+#ifdef _DEBUG
+// Keep this function here..
+// It allows you to redraw the screen from within the MSVC debugger
+int RedrawScreenDebug(void)
+{
+	HDC dc,dc2;
+	static int _fooctr;
+	HBITMAP old_bmp;
+	HPALETTE old_palette;
+
+	_screen.dst_ptr = _wnd.buffer_bits;
+	UpdateWindows();
+
+	dc = GetDC(_wnd.main_wnd);
+	dc2 = CreateCompatibleDC(dc);
+
+	old_bmp = SelectObject(dc2, _wnd.dib_sect);
+	old_palette = SelectPalette(dc, _wnd.gdi_palette, FALSE);
+	BitBlt(dc, 0, 0, _wnd.width, _wnd.height, dc2, 0, 0, SRCCOPY);
+	SelectPalette(dc, old_palette, TRUE);
+	SelectObject(dc2, old_bmp);
+	DeleteDC(dc2);
+	ReleaseDC(_wnd.main_wnd, dc);
+
+	return _fooctr++;
+}
+#endif
+
+static LRESULT CALLBACK WndProcGdi(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
+{
+	switch (msg) {
+	case WM_PAINT: {
+		PAINTSTRUCT ps;
+		HDC dc,dc2;
+		HBITMAP old_bmp;
+		HPALETTE old_palette;
+		BeginPaint(hwnd, &ps);
+		dc = ps.hdc;
+		dc2 = CreateCompatibleDC(dc);
+		old_bmp = SelectObject(dc2, _wnd.dib_sect);
+		old_palette = SelectPalette(dc, _wnd.gdi_palette, FALSE);
+
+		if (_pal_last_dirty != -1) {
+			UpdatePalette(dc2, _pal_first_dirty, _pal_last_dirty - _pal_first_dirty + 1);
+			_pal_last_dirty = -1;
+		}
+
+		BitBlt(dc, 0, 0, _wnd.width, _wnd.height, dc2, 0, 0, SRCCOPY);
+		SelectPalette(dc, old_palette, TRUE);
+		SelectObject(dc2, old_bmp);
+		DeleteDC(dc2);
+		EndPaint(hwnd, &ps);
+		}
+		return 0;
+
+	case WM_PALETTECHANGED:
+		if ((HWND)wParam == hwnd)
+			return 0;
+		// FALL THROUGH
+	case WM_QUERYNEWPALETTE: {
+		HDC hDC = GetWindowDC(hwnd);
+		HPALETTE hOldPalette = SelectPalette(hDC, _wnd.gdi_palette, FALSE);
+		UINT nChanged = RealizePalette(hDC);
+		SelectPalette(hDC, hOldPalette, TRUE);
+		ReleaseDC(hwnd, hDC);
+		if (nChanged)
+			InvalidateRect(hwnd, NULL, FALSE);
+		return 0;
+	}
+
+	case WM_CLOSE:
+		if (_game_mode == GM_MENU) { // do not ask to quit on the main screen
+			_exit_game = true;
+		} else if (_patches.autosave_on_exit) {
+			DoExitSave();
+			_exit_game = true;
+		} else
+			AskExitGame();
+
+		return 0;
+
+	case WM_LBUTTONDOWN:
+		SetCapture(hwnd);
+		_left_button_down = true;
+		return 0;
+
+	case WM_LBUTTONUP:
+		ReleaseCapture();
+		_left_button_down = false;
+		_left_button_clicked = false;
+		return 0;
+
+	case WM_RBUTTONDOWN:
+		SetCapture(hwnd);
+		_right_button_down = true;
+		_right_button_clicked = true;
+		return 0;
+
+	case WM_RBUTTONUP:
+		ReleaseCapture();
+		_right_button_down = false;
+		return 0;
+
+	case WM_MOUSEMOVE: {
+		int x = (int16)LOWORD(lParam);
+		int y = (int16)HIWORD(lParam);
+		POINT pt;
+
+		if (_wnd.double_size) {
+			x /= 2;
+			y /= 2;
+		}
+
+		if (_cursor.fix_at) {
+			int dx = x - _cursor.pos.x;
+			int dy = y - _cursor.pos.y;
+			if (dx != 0 || dy != 0) {
+				_cursor.delta.x += dx;
+				_cursor.delta.y += dy;
+
+				pt.x = _cursor.pos.x;
+				pt.y = _cursor.pos.y;
+
+				if (_wnd.double_size) {
+					pt.x *= 2;
+					pt.y *= 2;
+				}
+				ClientToScreen(hwnd, &pt);
+				SetCursorPos(pt.x, pt.y);
+			}
+		} else {
+			_cursor.delta.x += x - _cursor.pos.x;
+			_cursor.delta.y += y - _cursor.pos.y;
+			_cursor.pos.x = x;
+			_cursor.pos.y = y;
+			_cursor.dirty = true;
+		}
+		MyShowCursor(false);
+		return 0;
+	}
+
+	case WM_KEYDOWN: {
+		// this is the rewritten ascii input function
+		// it disables windows deadkey handling --> more linux like :D
+		unsigned short w = 0;
+		int r = 0;
+		byte ks[256];
+		unsigned int scan = 0;
+		uint16 scancode = (( lParam & 0xFF0000 ) >> 16 );
+
+		GetKeyboardState(ks);
+		r = ToAscii(wParam, scan, ks, &w, 0);
+		if (r == 0) w = 0; // no translation was possible
+
+		_pressed_key = w | MapWindowsKey(wParam) << 16;
+
+		if (scancode == 41)
+			_pressed_key = w | WKC_BACKQUOTE << 16;
+
+		if ((_pressed_key >> 16) == ('D' | WKC_CTRL) && !_wnd.fullscreen) {
+			_double_size ^= 1;
+			_wnd.double_size = _double_size;
+			ClientSizeChanged(_wnd.width, _wnd.height);
+			MarkWholeScreenDirty();
+		}
+	} break;
+
+	case WM_SYSKEYDOWN: /* user presses F10 or Alt, both activating the title-menu */
+		switch (wParam) {
+		case VK_RETURN: case 0x46: /* Full Screen on ALT + ENTER/F(VK_F) */
+			ToggleFullScreen(!_wnd.fullscreen);
+			return 0;
+		case VK_MENU: /* Just ALT */
+			return 0; // do nothing
+		case VK_F10: /* F10, ignore activation of menu */
+			_pressed_key = MapWindowsKey(wParam) << 16;
+			return 0;
+		default: /* ALT in combination with something else */
+			_pressed_key = MapWindowsKey(wParam) << 16;
+			break;
+		}
+		break;
+	case WM_NCMOUSEMOVE:
+		MyShowCursor(true);
+		return 0;
+
+	case WM_SIZE: {
+		if (wParam != SIZE_MINIMIZED) {
+			ClientSizeChanged(LOWORD(lParam), HIWORD(lParam));
+		}
+		return 0;
+	}
+	case WM_SIZING: {
+		RECT* r = (RECT*)lParam;
+		RECT r2;
+		int w, h;
+
+		SetRect(&r2, 0, 0, 0, 0);
+		AdjustWindowRect(&r2, GetWindowLong(hwnd, GWL_STYLE), FALSE);
+
+		w = r->right - r->left - (r2.right - r2.left);
+		h = r->bottom - r->top - (r2.bottom - r2.top);
+		if (_wnd.double_size) {
+			w /= 2;
+			h /= 2;
+		}
+		w = clamp(w, 64, MAX_SCREEN_WIDTH);
+		h = clamp(h, 64, MAX_SCREEN_HEIGHT);
+		if (_wnd.double_size) {
+			w *= 2;
+			h *= 2;
+		}
+		SetRect(&r2, 0, 0, w, h);
+
+		AdjustWindowRect(&r2, GetWindowLong(hwnd, GWL_STYLE), FALSE);
+		w = r2.right - r2.left;
+		h = r2.bottom - r2.top;
+
+		switch (wParam) {
+		case WMSZ_BOTTOM:
+			r->bottom = r->top + h;
+			break;
+		case WMSZ_BOTTOMLEFT:
+			r->bottom = r->top + h;
+			r->left = r->right - w;
+			break;
+		case WMSZ_BOTTOMRIGHT:
+			r->bottom = r->top + h;
+			r->right = r->left + w;
+			break;
+		case WMSZ_LEFT:
+			r->left = r->right - w;
+			break;
+		case WMSZ_RIGHT:
+			r->right = r->left + w;
+			break;
+		case WMSZ_TOP:
+			r->top = r->bottom - h;
+			break;
+		case WMSZ_TOPLEFT:
+			r->top = r->bottom - h;
+			r->left = r->right - w;
+			break;
+		case WMSZ_TOPRIGHT:
+			r->top = r->bottom - h;
+			r->right = r->left + w;
+			break;
+		}
+		return TRUE;
+	}
+
+// needed for wheel
+#if !defined(WM_MOUSEWHEEL)
+# define WM_MOUSEWHEEL                   0x020A
+#endif  //WM_MOUSEWHEEL
+#if !defined(GET_WHEEL_DELTA_WPARAM)
+# define GET_WHEEL_DELTA_WPARAM(wparam) ((short)HIWORD(wparam))
+#endif  //GET_WHEEL_DELTA_WPARAM
+
+	case WM_MOUSEWHEEL: {
+		int delta = GET_WHEEL_DELTA_WPARAM(wParam);
+
+		if (delta < 0) {
+			_cursor.wheel++;
+		} else if (delta > 0) {
+			_cursor.wheel--;
+		}
+		return 0;
+	}
+
+	case WM_ACTIVATEAPP:
+		_wnd.has_focus = (bool)wParam;
+		break;
+	}
+	return DefWindowProc(hwnd, msg, wParam, lParam);
+}
+
+static void RegisterWndClass(void)
+{
+	static bool registered;
+	if (!registered) {
+		HINSTANCE hinst = GetModuleHandle(NULL);
+		WNDCLASS wnd = {
+			0,
+			WndProcGdi,
+			0,
+			0,
+			hinst,
+			LoadIcon(hinst, MAKEINTRESOURCE(100)),
+			LoadCursor(NULL, IDC_ARROW),
+			0,
+			0,
+			"OTTD"
+		};
+		registered = true;
+		if (!RegisterClass(&wnd))
+			error("RegisterClass failed");
+	}
+}
+
+extern const char _openttd_revision[];
+
+static void MakeWindow(bool full_screen)
+{
+	_fullscreen = full_screen;
+
+	_wnd.double_size = _double_size && !full_screen;
+
+	// recreate window?
+	if ((full_screen || _wnd.fullscreen) && _wnd.main_wnd) {
+		DestroyWindow(_wnd.main_wnd);
+		_wnd.main_wnd = 0;
+	}
+
+	if (full_screen) {
+		DEVMODE settings;
+		memset(&settings, 0, sizeof(DEVMODE));
+		settings.dmSize = sizeof(DEVMODE);
+		settings.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT;
+
+		if (_fullscreen_bpp) {
+			settings.dmBitsPerPel = _fullscreen_bpp;
+			settings.dmFields |= DM_BITSPERPEL;
+		}
+		settings.dmPelsWidth = _wnd.width_org;
+		settings.dmPelsHeight = _wnd.height_org;
+		settings.dmDisplayFrequency = _display_hz;
+		if (settings.dmDisplayFrequency != 0)
+			settings.dmFields |= DM_DISPLAYFREQUENCY;
+		if (ChangeDisplaySettings(&settings, CDS_FULLSCREEN) != DISP_CHANGE_SUCCESSFUL) {
+			MakeWindow(false);
+			return;
+		}
+	} else if (_wnd.fullscreen) {
+		// restore display?
+		ChangeDisplaySettings(NULL, 0);
+	}
+
+	{
+		RECT r;
+		uint style;
+		int x, y, w, h;
+
+		_wnd.fullscreen = full_screen;
+		if (_wnd.fullscreen) {
+			style = WS_POPUP | WS_VISIBLE;
+			SetRect(&r, 0, 0, _wnd.width_org, _wnd.height_org);
+		} else {
+			style = WS_OVERLAPPEDWINDOW | WS_VISIBLE;
+			SetRect(&r, 0, 0, _wnd.width, _wnd.height);
+		}
+
+		AdjustWindowRect(&r, style, FALSE);
+		w = r.right - r.left;
+		h = r.bottom - r.top;
+		x = (GetSystemMetrics(SM_CXSCREEN) - w) / 2;
+		y = (GetSystemMetrics(SM_CYSCREEN) - h) / 2;
+
+		if (_wnd.main_wnd) {
+			SetWindowPos(_wnd.main_wnd, 0, x, y, w, h, SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOZORDER);
+		} else {
+			char Windowtitle[50];
+
+			snprintf(Windowtitle, lengthof(Windowtitle), "OpenTTD %s", _openttd_revision);
+
+			_wnd.main_wnd = CreateWindow("OTTD", Windowtitle, style, x, y, w, h, 0, 0, GetModuleHandle(NULL), 0);
+			if (_wnd.main_wnd == NULL)
+				error("CreateWindow failed");
+		}
+	}
+	GameSizeChanged(); // invalidate all windows, force redraw
+}
+
+static bool AllocateDibSection(int w, int h)
+{
+	BITMAPINFO *bi;
+	HDC dc;
+
+	w = clamp(w, 64, MAX_SCREEN_WIDTH);
+	h = clamp(h, 64, MAX_SCREEN_HEIGHT);
+
+	if (w == _screen.width && h == _screen.height)
+		return false;
+
+	_screen.width = w;
+	_screen.pitch = (w + 3) & ~0x3;
+	_screen.height = h;
+
+	if (_wnd.alloced_bits) {
+		free(_wnd.alloced_bits);
+		_wnd.alloced_bits = NULL;
+	}
+
+	bi = alloca(sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD)*256);
+	memset(bi, 0, sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD)*256);
+	bi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
+
+	if (_wnd.double_size) {
+		w = (w + 3) & ~0x3;
+		_wnd.alloced_bits = _wnd.buffer_bits = malloc(w * h);
+		w *= 2;
+		h *= 2;
+	}
+
+	bi->bmiHeader.biWidth = _wnd.width = w;
+	bi->bmiHeader.biHeight = -(_wnd.height = h);
+
+	bi->bmiHeader.biPlanes = 1;
+	bi->bmiHeader.biBitCount = 8;
+	bi->bmiHeader.biCompression = BI_RGB;
+
+	if (_wnd.dib_sect)
+		DeleteObject(_wnd.dib_sect);
+
+	dc = GetDC(0);
+	_wnd.dib_sect = CreateDIBSection(dc, bi, DIB_RGB_COLORS, (void**)&_wnd.bitmap_bits, NULL, 0);
+	if (_wnd.dib_sect == NULL)
+		error("CreateDIBSection failed");
+	ReleaseDC(0, dc);
+
+	if (!_wnd.double_size)
+		_wnd.buffer_bits = _wnd.bitmap_bits;
+
+	return true;
+}
+
+static const uint16 default_resolutions[][2] = {
+	{ 640,  480},
+	{ 800,  600},
+	{1024,  768},
+	{1152,  864},
+	{1280,  800},
+	{1280,  960},
+	{1280, 1024},
+	{1400, 1050},
+	{1600, 1200},
+	{1680, 1050},
+	{1920, 1200}
+};
+
+static void FindResolutions(void)
+{
+	int i = 0, n = 0;
+	DEVMODE dm;
+
+	while (EnumDisplaySettings(NULL, i++, &dm) != 0) {
+		if (dm.dmBitsPerPel == 8 && IS_INT_INSIDE(dm.dmPelsWidth, 640, MAX_SCREEN_WIDTH + 1) &&
+				IS_INT_INSIDE(dm.dmPelsHeight, 480, MAX_SCREEN_HEIGHT + 1)){
+			int j;
+			for (j = 0; j < n; j++) {
+				if (_resolutions[j][0] == dm.dmPelsWidth && _resolutions[j][1] == dm.dmPelsHeight) break;
+			}
+
+			/* In the previous loop we have checked already existing/added resolutions if
+			 * they are the same as the new ones. If this is not the case (j == n); we have
+			 * looped all and found none, add the new one to the list. If we have reached the
+			 * maximum amount of resolutions, then quit querying the display */
+			if (j == n) {
+				_resolutions[j][0] = dm.dmPelsWidth;
+				_resolutions[j][1] = dm.dmPelsHeight;
+				if (++n == lengthof(_resolutions)) break;
+			}
+		}
+	}
+
+	/* We have found no resolutions, show the default list */
+	if (n == 0) {
+		memcpy(_resolutions, default_resolutions, sizeof(default_resolutions));
+		n = lengthof(default_resolutions);
+	}
+
+	_num_resolutions = n;
+	SortResolutions(_num_resolutions);
+}
+
+
+static const char *Win32GdiStart(const char * const *parm)
+{
+	memset(&_wnd, 0, sizeof(_wnd));
+	_wnd.cursor_visible = true;
+
+	RegisterWndClass();
+
+	MakePalette();
+
+	FindResolutions();
+
+	// fullscreen uses those
+	_wnd.width_org = _cur_resolution[0];
+	_wnd.height_org = _cur_resolution[1];
+
+	AllocateDibSection(_cur_resolution[0], _cur_resolution[1]);
+	MarkWholeScreenDirty();
+
+	MakeWindow(_fullscreen);
+
+	return NULL;
+}
+
+static void Win32GdiStop(void)
+{
+	if (_wnd.fullscreen) ChangeDisplaySettings(NULL, 0);
+	MyShowCursor(true);
+	DeleteObject(_wnd.gdi_palette);
+	DeleteObject(_wnd.dib_sect);
+	DestroyWindow(_wnd.main_wnd);
+}
+
+// simple upscaler by 2
+static void filter(int left, int top, int width, int height)
+{
+	uint p = _screen.pitch;
+	const Pixel *s = _wnd.buffer_bits + top * p + left;
+	Pixel *d = _wnd.bitmap_bits + top * p * 4 + left * 2;
+
+	for (; height > 0; height--) {
+		int i;
+
+		for (i = 0; i != width; i++) {
+			d[i * 2] = d[i * 2 + 1] = d[i * 2 + p * 2] = d[i * 2 + 1 + p * 2] = s[i];
+		}
+		s += p;
+		d += p * 4;
+	}
+}
+
+static void Win32GdiMakeDirty(int left, int top, int width, int height)
+{
+	RECT r = { left, top, left + width, top + height };
+
+	if (_wnd.double_size) {
+		filter(left, top, width, height);
+		r.left *= 2;
+		r.top *= 2;
+		r.right *= 2;
+		r.bottom *= 2;
+	}
+	InvalidateRect(_wnd.main_wnd, &r, FALSE);
+}
+
+static void CheckPaletteAnim(void)
+{
+	if (_pal_last_dirty == -1)
+		return;
+	InvalidateRect(_wnd.main_wnd, NULL, FALSE);
+}
+
+static int Win32GdiMainLoop(void)
+{
+	MSG mesg;
+	uint32 next_tick = GetTickCount() + 30, cur_ticks;
+
+	_wnd.running = true;
+
+	while(true) {
+		while (PeekMessage(&mesg, NULL, 0, 0, PM_REMOVE)) {
+			InteractiveRandom(); // randomness
+			TranslateMessage(&mesg);
+			DispatchMessage(&mesg);
+		}
+		if (_exit_game) return ML_QUIT;
+		if (_wnd.switch_driver) return ML_SWITCHDRIVER;
+
+#if defined(_DEBUG)
+		if (_wnd.has_focus && GetAsyncKeyState(VK_SHIFT) < 0) {
+			if (
+#else
+		if (_wnd.has_focus && GetAsyncKeyState(VK_TAB) < 0) {
+			/* Disable speeding up game with ALT+TAB (if syskey is pressed, the
+			 * real key is in the upper 16 bits (see WM_SYSKEYDOWN in WndProcGdi()) */
+			if ((_pressed_key >> 16) & WKC_TAB &&
+#endif
+			    !_networking && _game_mode != GM_MENU)
+				_fast_forward |= 2;
+		} else if (_fast_forward & 2)
+			_fast_forward = 0;
+
+		cur_ticks = GetTickCount();
+		if ((_fast_forward && !_pause) || cur_ticks > next_tick)
+			next_tick = cur_ticks;
+
+		if (cur_ticks == next_tick) {
+			next_tick += 30;
+			_ctrl_pressed = _wnd.has_focus && GetAsyncKeyState(VK_CONTROL)<0;
+			_shift_pressed = _wnd.has_focus && GetAsyncKeyState(VK_SHIFT)<0;
+			_dbg_screen_rect = _wnd.has_focus && GetAsyncKeyState(VK_CAPITAL)<0;
+
+			// determine which directional keys are down
+			if (_wnd.has_focus) {
+				_dirkeys =
+					(GetAsyncKeyState(VK_LEFT) < 0 ? 1 : 0) +
+					(GetAsyncKeyState(VK_UP) < 0 ? 2 : 0) +
+					(GetAsyncKeyState(VK_RIGHT) < 0 ? 4 : 0) +
+					(GetAsyncKeyState(VK_DOWN) < 0 ? 8 : 0);
+			} else
+				_dirkeys = 0;
+
+			GameLoop();
+			_cursor.delta.x = _cursor.delta.y = 0;
+
+			if (_force_full_redraw)
+				MarkWholeScreenDirty();
+
+			GdiFlush();
+			_screen.dst_ptr = _wnd.buffer_bits;
+			UpdateWindows();
+			CheckPaletteAnim();
+		} else {
+			Sleep(1);
+			GdiFlush();
+			_screen.dst_ptr = _wnd.buffer_bits;
+			DrawTextMessage();
+			DrawMouseCursor();
+		}
+	}
+}
+
+static bool Win32GdiChangeRes(int w, int h)
+{
+	_wnd.width = _wnd.width_org = w;
+	_wnd.height = _wnd.height_org = h;
+
+	MakeWindow(_fullscreen); // _wnd.fullscreen screws up ingame resolution switching
+
+	return true;
+}
+
+static void Win32GdiFullScreen(bool full_screen) {MakeWindow(full_screen);}
+
+const HalVideoDriver _win32_video_driver = {
+	Win32GdiStart,
+	Win32GdiStop,
+	Win32GdiMakeDirty,
+	Win32GdiMainLoop,
+	Win32GdiChangeRes,
+	Win32GdiFullScreen,
+};