summaryrefslogtreecommitdiff
path: root/src/video/win32_v.cpp
blob: fffb8677089ddcec5a59bd000f9d8e32e2ef298f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file win32_v.cpp Implementation of the Windows (GDI) video driver. */

#include "../stdafx.h"
#include "../openttd.h"
#include "../gfx_func.h"
#include "../variables.h"
#include "../win32.h"
#include "../rev.h"
#include "../blitter/factory.hpp"
#include "../network/network.h"
#include "../core/math_func.hpp"
#include "../core/random_func.hpp"
#include "../functions.h"
#include "../texteff.hpp"
#include "win32_v.h"
#include <windows.h>

static struct {
	HWND main_wnd;
	HBITMAP dib_sect;
	void *buffer_bits;
	HPALETTE gdi_palette;
	int width;
	int height;
	int width_org;
	int height_org;
	bool fullscreen;
	bool has_focus;
	bool running;
} _wnd;

bool _force_full_redraw;
bool _window_maximize;
uint _display_hz;
uint _fullscreen_bpp;
static Dimension _bck_resolution;
#if !defined(UNICODE)
uint _codepage;
#endif

static void MakePalette()
{
	LOGPALETTE *pal;
	uint i;

	pal = (LOGPALETTE*)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) usererror("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);
}

struct VkMapping {
	byte vk_from;
	byte vk_count;
	byte map_to;
};

#define AS(x, z) {x, 0, z}
#define AM(x, y, z, w) {x, y - x, z}

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 */
	AM(VK_NUMPAD0, VK_NUMPAD9, '0', '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),

	/* Other non-letter keys */
	AS(0xBF,  WKC_SLASH),
	AS(0xBA,  WKC_SEMICOLON),
	AS(0xBB,  WKC_EQUALS),
	AS(0xDB,  WKC_L_BRACKET),
	AS(0xDC,  WKC_BACKSLASH),
	AS(0xDD,  WKC_R_BRACKET),

	AS(0xDE,  WKC_SINGLEQUOTE),
	AS(0xBC,  WKC_COMMA),
	AS(0xBD,  WKC_MINUS),
	AS(0xBE,  WKC_PERIOD)
};

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 bool AllocateDibSection(int w, int h);

static void ClientSizeChanged(int w, int h)
{
	/* allocate new dib section of the new size */
	if (AllocateDibSection(w, h)) {
		/* mark all palette colors dirty */
		_pal_first_dirty = 0;
		_pal_count_dirty = 256;
		GameSizeChanged();

		/* redraw screen */
		if (_wnd.running) {
			_screen.dst_ptr = _wnd.buffer_bits;
			UpdateWindows();
		}
	}
}

#ifdef _DEBUG
/* Keep this function here..
 * It allows you to redraw the screen from within the MSVC debugger */
int RedrawScreenDebug()
{
	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 = (HBITMAP)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

/* Windows 95 will not have a WM_MOUSELEAVE message, so define it if needed */
#if !defined(WM_MOUSELEAVE)
#define WM_MOUSELEAVE 0x02A3
#endif
#define TID_POLLMOUSE 1
#define MOUSE_POLL_DELAY 75

static void CALLBACK TrackMouseTimerProc(HWND hwnd, UINT msg, UINT event, DWORD time)
{
	RECT rc;
	POINT pt;

	/* Get the rectangle of our window and translate it to screen coordinates.
	 * Compare this with the current screen coordinates of the mouse and if it
	 * falls outside of the area or our window we have left the window. */
	GetClientRect(hwnd, &rc);
	MapWindowPoints(hwnd, HWND_DESKTOP, (LPPOINT)(LPRECT)&rc, 2);
	GetCursorPos(&pt);

	if (!PtInRect(&rc, pt) || (WindowFromPoint(pt) != hwnd)) {
		KillTimer(hwnd, event);
		PostMessage(hwnd, WM_MOUSELEAVE, 0, 0L);
	}
}

static bool MakeWindow(bool full_screen)
{
	_fullscreen = full_screen;

	/* recreate window? */
	if ((full_screen || _wnd.fullscreen) && _wnd.main_wnd) {
		DestroyWindow(_wnd.main_wnd);
		_wnd.main_wnd = 0;
	}

#if defined(WINCE)
	/* WinCE is always fullscreen */
#else
	if (full_screen) {
		DEVMODE settings;

		/* Make sure we are always at least the screen-depth of the blitter */
		if (_fullscreen_bpp < BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth()) _fullscreen_bpp = BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth();

		memset(&settings, 0, sizeof(settings));
		settings.dmSize = sizeof(settings);
		settings.dmFields =
			(_fullscreen_bpp != 0 ? DM_BITSPERPEL : 0) |
			DM_PELSWIDTH |
			DM_PELSHEIGHT |
			(_display_hz != 0 ? DM_DISPLAYFREQUENCY : 0);
		settings.dmBitsPerPel = _fullscreen_bpp;
		settings.dmPelsWidth  = _wnd.width_org;
		settings.dmPelsHeight = _wnd.height_org;
		settings.dmDisplayFrequency = _display_hz;

		if (ChangeDisplaySettings(&settings, CDS_FULLSCREEN) != DISP_CHANGE_SUCCESSFUL) {
			MakeWindow(false);  // don't care about the result
			return false;  // the request failed
		}
	} else if (_wnd.fullscreen) {
		/* restore display? */
		ChangeDisplaySettings(NULL, 0);
	}
#endif

	{
		RECT r;
		DWORD style, showstyle;
		int x, y, w, h;

		showstyle = SW_SHOWNORMAL;
		_wnd.fullscreen = full_screen;
		if (_wnd.fullscreen) {
			style = WS_POPUP;
			SetRect(&r, 0, 0, _wnd.width_org, _wnd.height_org);
		} else {
			style = WS_OVERLAPPEDWINDOW;
			/* On window creation, check if we were in maximize mode before */
			if (_window_maximize) showstyle = SW_SHOWMAXIMIZED;
			SetRect(&r, 0, 0, _wnd.width, _wnd.height);
		}

#if !defined(WINCE)
		AdjustWindowRect(&r, style, FALSE);
#endif
		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) {
			ShowWindow(_wnd.main_wnd, SW_SHOWNORMAL); // remove maximize-flag
			SetWindowPos(_wnd.main_wnd, 0, x, y, w, h, SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOZORDER);
		} else {
			TCHAR Windowtitle[50];

			_sntprintf(Windowtitle, lengthof(Windowtitle), _T("OpenTTD %s"), MB_TO_WIDE(_openttd_revision));

			_wnd.main_wnd = CreateWindow(_T("OTTD"), Windowtitle, style, x, y, w, h, 0, 0, GetModuleHandle(NULL), 0);
			if (_wnd.main_wnd == NULL) usererror("CreateWindow failed");
			ShowWindow(_wnd.main_wnd, showstyle);
		}
	}
	GameSizeChanged(); // invalidate all windows, force redraw
	return true; // the request succedded
}

static LRESULT CALLBACK WndProcGdi(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	static uint32 keycode = 0;
	static bool console = false;

	switch (msg) {
		case WM_CREATE:
			SetTimer(hwnd, TID_POLLMOUSE, MOUSE_POLL_DELAY, (TIMERPROC)TrackMouseTimerProc);
			break;

		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 = (HBITMAP)SelectObject(dc2, _wnd.dib_sect);
			old_palette = SelectPalette(dc, _wnd.gdi_palette, FALSE);

			if (_pal_count_dirty != 0) {
				Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();

				switch (blitter->UsePaletteAnimation()) {
					case Blitter::PALETTE_ANIMATION_VIDEO_BACKEND:
						UpdatePalette(dc2, _pal_first_dirty, _pal_count_dirty);
						break;

					case Blitter::PALETTE_ANIMATION_BLITTER:
						blitter->PaletteAnimate(_pal_first_dirty, _pal_count_dirty);
						break;

					case Blitter::PALETTE_ANIMATION_NONE:
						break;

					default:
						NOT_REACHED();
				}
				_pal_count_dirty = 0;
			}

			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;
			/* FALLTHROUGH */

		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:
			HandleExitGameRequest();
			return 0;

		case WM_DESTROY:
			if (_window_maximize) _cur_resolution = _bck_resolution;
			return 0;

		case WM_LBUTTONDOWN:
			SetCapture(hwnd);
			_left_button_down = true;
			HandleMouseEvents();
			return 0;

		case WM_LBUTTONUP:
			ReleaseCapture();
			_left_button_down = false;
			_left_button_clicked = false;
			HandleMouseEvents();
			return 0;

		case WM_RBUTTONDOWN:
			SetCapture(hwnd);
			_right_button_down = true;
			_right_button_clicked = true;
			HandleMouseEvents();
			return 0;

		case WM_RBUTTONUP:
			ReleaseCapture();
			_right_button_down = false;
			HandleMouseEvents();
			return 0;

		case WM_MOUSELEAVE:
			UndrawMouseCursor();
			_cursor.in_window = false;

			if (!_left_button_down && !_right_button_down) MyShowCursor(true);
			HandleMouseEvents();
			return 0;

		case WM_MOUSEMOVE: {
			int x = (int16)LOWORD(lParam);
			int y = (int16)HIWORD(lParam);
			POINT pt;

			/* If the mouse was not in the window and it has moved it means it has
			 * come into the window, so start drawing the mouse. Also start
			 * tracking the mouse for exiting the window */
			if (!_cursor.in_window) {
				_cursor.in_window = true;
				SetTimer(hwnd, TID_POLLMOUSE, MOUSE_POLL_DELAY, (TIMERPROC)TrackMouseTimerProc);

				DrawMouseCursor();
			}

			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;

					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);
			HandleMouseEvents();
			return 0;
		}

#if !defined(UNICODE)
		case WM_INPUTLANGCHANGE: {
			TCHAR locale[6];
			LCID lcid = GB(lParam, 0, 16);

			int len = GetLocaleInfo(lcid, LOCALE_IDEFAULTANSICODEPAGE, locale, lengthof(locale));
			if (len != 0) _codepage = _ttoi(locale);
			return 1;
		}
#endif /* UNICODE */

		case WM_DEADCHAR:
			console = GB(lParam, 16, 8) == 41;
			return 0;

		case WM_CHAR: {
			uint scancode = GB(lParam, 16, 8);
			uint charcode = wParam;

			/* If the console key is a dead-key, we need to press it twice to get a WM_CHAR message.
			 * But we then get two WM_CHAR messages, so ignore the first one */
			if (console && scancode == 41) {
				console = false;
				return 0;
			}

#if !defined(UNICODE)
			wchar_t w;
			int len = MultiByteToWideChar(_codepage, 0, (char*)&charcode, 1, &w, 1);
			charcode = len == 1 ? w : 0;
#endif /* UNICODE */

			/* No matter the keyboard layout, we will map the '~' to the console */
			scancode = scancode == 41 ? (int)WKC_BACKQUOTE : keycode;
			HandleKeypress(GB(charcode, 0, 16) | (scancode << 16));
			return 0;
		}

		case WM_KEYDOWN: {
			keycode = MapWindowsKey(wParam);

			/* Silently drop all messages handled by WM_CHAR. */
			MSG msg;
			if (PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE)) {
				if (msg.message == WM_CHAR && GB(lParam, 16, 8) == GB(msg.lParam, 16, 8)) {
					return 0;
				}
			}

			HandleKeypress(0 | (keycode << 16));
			return 0;
		}

		case WM_SYSKEYDOWN: // user presses F10 or Alt, both activating the title-menu
			switch (wParam) {
				case VK_RETURN:
				case 'F': // Full Screen on ALT + ENTER/F
					ToggleFullScreen(!_wnd.fullscreen);
					return 0;

				case VK_MENU: // Just ALT
					return 0; // do nothing

				case VK_F10: // F10, ignore activation of menu
					HandleKeypress(MapWindowsKey(wParam) << 16);
					return 0;

				default: // ALT in combination with something else
					HandleKeypress(MapWindowsKey(wParam) << 16);
					break;
			}
			break;

		case WM_SIZE:
			if (wParam != SIZE_MINIMIZED) {
				/* Set maximized flag when we maximize (obviously), but also when we
				 * switched to fullscreen from a maximized state */
				_window_maximize = (wParam == SIZE_MAXIMIZED || (_window_maximize && _fullscreen));
				if (_window_maximize) _bck_resolution = _cur_resolution;
				ClientSizeChanged(LOWORD(lParam), HIWORD(lParam));
			}
			return 0;

#if !defined(WINCE)
		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);
			w = max(w, 64);
			h = max(h, 64);
			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;
		}
#endif

/* 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--;
			}
			HandleMouseEvents();
			return 0;
		}

		case WM_SETFOCUS:
			_wnd.has_focus = true;
			break;

		case WM_KILLFOCUS:
			_wnd.has_focus = false;
			break;

#if !defined(WINCE)
		case WM_ACTIVATE: {
			/* Don't do anything if we are closing openttd */
			if (_exit_game) break;

			bool active = (LOWORD(wParam) != WA_INACTIVE);
			bool minimized = (HIWORD(wParam) != 0);
			if (_wnd.fullscreen) {
				if (active && minimized) {
					/* Restore the game window */
					ShowWindow(hwnd, SW_RESTORE);
					MakeWindow(true);
				} else if (!active && !minimized) {
					/* Minimise the window and restore desktop */
					ShowWindow(hwnd, SW_MINIMIZE);
					ChangeDisplaySettings(NULL, 0);
				}
			}
		} break;
#endif
	}

	return DefWindowProc(hwnd, msg, wParam, lParam);
}

static void RegisterWndClass()
{
	static bool registered = false;

	if (!registered) {
		HINSTANCE hinst = GetModuleHandle(NULL);
		WNDCLASS wnd = {
			0,
			WndProcGdi,
			0,
			0,
			hinst,
			LoadIcon(hinst, MAKEINTRESOURCE(100)),
			LoadCursor(NULL, IDC_ARROW),
			0,
			0,
			_T("OTTD")
		};

		registered = true;
		if (!RegisterClass(&wnd)) usererror("RegisterClass failed");
	}
}

static bool AllocateDibSection(int w, int h)
{
	BITMAPINFO *bi;
	HDC dc;
	int bpp = BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth();

	w = max(w, 64);
	h = max(h, 64);

	if (bpp == 0) usererror("Can't use a blitter that blits 0 bpp for normal visuals");

	if (w == _screen.width && h == _screen.height)
		return false;

	_screen.width = w;
	_screen.pitch = (bpp == 8) ? Align(w, 4) : w;
	_screen.height = h;
	bi = (BITMAPINFO*)alloca(sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * 256);
	memset(bi, 0, sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * 256);
	bi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);

	bi->bmiHeader.biWidth = _wnd.width = w;
	bi->bmiHeader.biHeight = -(_wnd.height = h);

	bi->bmiHeader.biPlanes = 1;
	bi->bmiHeader.biBitCount = BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth();
	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.buffer_bits, NULL, 0);
	if (_wnd.dib_sect == NULL) usererror("CreateDIBSection failed");
	ReleaseDC(0, dc);

	return true;
}

static const Dimension default_resolutions[] = {
	{  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()
{
	uint n = 0;
#if defined(WINCE)
	/* EnumDisplaySettingsW is only supported in CE 4.2+
	 * XXX -- One might argue that we assume 4.2+ on every system. Then we can use this function safely */
#else
	uint i;
	DEVMODEA dm;

	/* XXX - EnumDisplaySettingsW crashes with unicows.dll on Windows95
	 * Doesn't really matter since we don't pass a string anyways, but still
	 * a letdown */
	for (i = 0; EnumDisplaySettingsA(NULL, i, &dm) != 0; i++) {
		if (dm.dmBitsPerPel == BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth() &&
				dm.dmPelsWidth >= 640 && dm.dmPelsHeight >= 480) {
			uint j;

			for (j = 0; j < n; j++) {
				if (_resolutions[j].width == dm.dmPelsWidth && _resolutions[j].height == 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].width  = dm.dmPelsWidth;
				_resolutions[j].height = dm.dmPelsHeight;
				if (++n == lengthof(_resolutions)) break;
			}
		}
	}
#endif

	/* 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 FVideoDriver_Win32 iFVideoDriver_Win32;

const char *VideoDriver_Win32::Start(const char * const *parm)
{
	memset(&_wnd, 0, sizeof(_wnd));

	RegisterWndClass();

	MakePalette();

	FindResolutions();

	DEBUG(driver, 2, "Resolution for display: %ux%u", _cur_resolution.width, _cur_resolution.height);

	/* fullscreen uses those */
	_wnd.width_org  = _cur_resolution.width;
	_wnd.height_org = _cur_resolution.height;

	AllocateDibSection(_cur_resolution.width, _cur_resolution.height);
	MakeWindow(_fullscreen);

	MarkWholeScreenDirty();

	return NULL;
}

void VideoDriver_Win32::Stop()
{
	DeleteObject(_wnd.gdi_palette);
	DeleteObject(_wnd.dib_sect);
	DestroyWindow(_wnd.main_wnd);

#if !defined(WINCE)
	if (_wnd.fullscreen) ChangeDisplaySettings(NULL, 0);
#endif
	MyShowCursor(true);
}

void VideoDriver_Win32::MakeDirty(int left, int top, int width, int height)
{
	RECT r = { left, top, left + width, top + height };

	InvalidateRect(_wnd.main_wnd, &r, FALSE);
}

static void CheckPaletteAnim()
{
	if (_pal_count_dirty == 0)
		return;
	InvalidateRect(_wnd.main_wnd, NULL, FALSE);
}

void VideoDriver_Win32::MainLoop()
{
	MSG mesg;
	uint32 cur_ticks = GetTickCount();
	uint32 last_cur_ticks = cur_ticks;
	uint32 next_tick = cur_ticks + 30;

	_wnd.running = true;

	for (;;) {
		uint32 prev_cur_ticks = cur_ticks; // to check for wrapping

		while (PeekMessage(&mesg, NULL, 0, 0, PM_REMOVE)) {
			InteractiveRandom(); // randomness
			TranslateMessage(&mesg);
			DispatchMessage(&mesg);
		}
		if (_exit_game) return;

#if defined(_DEBUG)
		if (_wnd.has_focus && GetAsyncKeyState(VK_SHIFT) < 0 &&
#else
		/* Speed up using TAB, but disable for ALT+TAB of course */
		if (_wnd.has_focus && GetAsyncKeyState(VK_TAB) < 0 && GetAsyncKeyState(VK_MENU) >= 0 &&
#endif
			  !_networking && _game_mode != GM_MENU) {
			_fast_forward |= 2;
		} else if (_fast_forward & 2) {
			_fast_forward = 0;
		}

		cur_ticks = GetTickCount();
		if (cur_ticks >= next_tick || (_fast_forward && !_pause_mode) || cur_ticks < prev_cur_ticks) {
			_realtime_tick += cur_ticks - last_cur_ticks;
			last_cur_ticks = cur_ticks;
			next_tick = cur_ticks + 30;

			bool old_ctrl_pressed = _ctrl_pressed;

			_ctrl_pressed = _wnd.has_focus && GetAsyncKeyState(VK_CONTROL)<0;
			_shift_pressed = _wnd.has_focus && GetAsyncKeyState(VK_SHIFT)<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;
			}

			if (old_ctrl_pressed != _ctrl_pressed) HandleCtrlChanged();

			GameLoop();
			_cursor.delta.x = _cursor.delta.y = 0;

			if (_force_full_redraw) MarkWholeScreenDirty();

#if !defined(WINCE)
			GdiFlush();
#endif
			_screen.dst_ptr = _wnd.buffer_bits;
			UpdateWindows();
			CheckPaletteAnim();
		} else {
			Sleep(1);
#if !defined(WINCE)
			GdiFlush();
#endif
			_screen.dst_ptr = _wnd.buffer_bits;
			NetworkDrawChatMessage();
			DrawMouseCursor();
		}
	}
}

bool VideoDriver_Win32::ChangeResolution(int w, int h)
{
	_wnd.width = _wnd.width_org = w;
	_wnd.height = _wnd.height_org = h;

	return MakeWindow(_fullscreen); // _wnd.fullscreen screws up ingame resolution switching
}

bool VideoDriver_Win32::ToggleFullscreen(bool full_screen)
{
	return MakeWindow(full_screen);
}