aboutsummaryrefslogtreecommitdiff
path: root/backends/platform/sdl/sdl.cpp
blob: c89a56097650dde437acf0c8f693d443d4616757 (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
/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program 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; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#define FORBIDDEN_SYMBOL_ALLOW_ALL

#include "backends/platform/sdl/sdl.h"
#include "common/config-manager.h"
#include "gui/EventRecorder.h"
#include "common/taskbar.h"
#include "common/textconsole.h"
#include "common/translation.h"

#include "backends/saves/default/default-saves.h"

// Audio CD support was removed with SDL 2.0
#if SDL_VERSION_ATLEAST(2, 0, 0)
#include "backends/audiocd/default/default-audiocd.h"
#else
#include "backends/audiocd/sdl/sdl-audiocd.h"
#endif

#include "backends/events/default/default-events.h"
#include "backends/events/sdl/sdl-events.h"
#include "backends/mutex/sdl/sdl-mutex.h"
#include "backends/timer/sdl/sdl-timer.h"
#include "backends/graphics/surfacesdl/surfacesdl-graphics.h"
#ifdef USE_OPENGL
#include "backends/graphics/openglsdl/openglsdl-graphics.h"
#include "graphics/cursorman.h"
#endif

#include <time.h>	// for getTimeAndDate()

#ifdef USE_DETECTLANG
#ifndef WIN32
#include <locale.h>
#endif // !WIN32
#endif

#ifdef USE_SDL_NET
#include <SDL_net.h>
#endif

#if SDL_VERSION_ATLEAST(2, 0, 0)
#include <SDL_clipboard.h>
#endif

OSystem_SDL::OSystem_SDL()
	:
#ifdef USE_OPENGL
	_desktopWidth(0),
	_desktopHeight(0),
	_graphicsModes(),
	_graphicsMode(0),
	_firstGLMode(0),
	_defaultSDLMode(0),
	_defaultGLMode(0),
#endif
	_inited(false),
	_initedSDL(false),
#ifdef USE_SDL_NET
	_initedSDLnet(false),
#endif
	_logger(0),
	_mixerManager(0),
	_eventSource(0),
	_window(0) {

	ConfMan.registerDefault("kbdmouse_speed", 3);
	ConfMan.registerDefault("joystick_deadzone", 3);
}

OSystem_SDL::~OSystem_SDL() {
	SDL_ShowCursor(SDL_ENABLE);

	// Delete the various managers here. Note that the ModularBackend
	// destructor would also take care of this for us. However, various
	// of our managers must be deleted *before* we call SDL_Quit().
	// Hence, we perform the destruction on our own.
	delete _savefileManager;
	_savefileManager = 0;
	if (_graphicsManager) {
		dynamic_cast<SdlGraphicsManager *>(_graphicsManager)->deactivateManager();
	}
	delete _graphicsManager;
	_graphicsManager = 0;
	delete _window;
	_window = 0;
	delete _eventManager;
	_eventManager = 0;
	delete _eventSource;
	_eventSource = 0;
	delete _audiocdManager;
	_audiocdManager = 0;
	delete _mixerManager;
	_mixerManager = 0;

#ifdef ENABLE_EVENTRECORDER
	// HACK HACK HACK
	// This is nasty.
	delete g_eventRec.getTimerManager();
#else
	delete _timerManager;
#endif

	_timerManager = 0;
	delete _mutexManager;
	_mutexManager = 0;

	delete _logger;
	_logger = 0;

#ifdef USE_SDL_NET
	if (_initedSDLnet) SDLNet_Quit();
#endif

	SDL_Quit();
}

void OSystem_SDL::init() {
	// Initialize SDL
	initSDL();

#if !SDL_VERSION_ATLEAST(2, 0, 0)
	// Enable unicode support if possible
	SDL_EnableUNICODE(1);
#endif

	// Disable OS cursor
	SDL_ShowCursor(SDL_DISABLE);

	if (!_logger)
		_logger = new Backends::Log::Log(this);

	if (_logger) {
		Common::WriteStream *logFile = createLogFile();
		if (logFile)
			_logger->open(logFile);
	}


	// Creates the early needed managers, if they don't exist yet
	// (we check for this to allow subclasses to provide their own).
	if (_mutexManager == 0)
		_mutexManager = new SdlMutexManager();

	if (_window == 0)
		_window = new SdlWindow();

#if defined(USE_TASKBAR)
	if (_taskbarManager == 0)
		_taskbarManager = new Common::TaskbarManager();
#endif

}

bool OSystem_SDL::hasFeature(Feature f) {
#if SDL_VERSION_ATLEAST(2, 0, 0)
	if (f == kFeatureClipboardSupport) return true;
#endif
	if (f == kFeatureJoystickDeadzone || f == kFeatureKbdMouseSpeed) {
		bool joystickSupportEnabled = ConfMan.getInt("joystick_num") >= 0;
		return joystickSupportEnabled;
	}
	return ModularBackend::hasFeature(f);
}

void OSystem_SDL::initBackend() {
	// Check if backend has not been initialized
	assert(!_inited);

#if SDL_VERSION_ATLEAST(2, 0, 0)
	const char *sdlDriverName = SDL_GetCurrentVideoDriver();
#else
	const int maxNameLen = 20;
	char sdlDriverName[maxNameLen];
	sdlDriverName[0] = '\0';
	SDL_VideoDriverName(sdlDriverName, maxNameLen);
#endif
	debug(1, "Using SDL Video Driver \"%s\"", sdlDriverName);

	// Create the default event source, in case a custom backend
	// manager didn't provide one yet.
	if (_eventSource == 0)
		_eventSource = new SdlEventSource();

	if (_eventManager == nullptr) {
		DefaultEventManager *eventManager = new DefaultEventManager(_eventSource);
#if SDL_VERSION_ATLEAST(2, 0, 0)
		// SDL 2 generates its own keyboard repeat events.
		eventManager->setGenerateKeyRepeatEvents(false);
#endif
		_eventManager = eventManager;
	}


#ifdef USE_OPENGL
#if SDL_VERSION_ATLEAST(2, 0, 0)
	SDL_DisplayMode displayMode;
	if (!SDL_GetDesktopDisplayMode(0, &displayMode)) {
		_desktopWidth  = displayMode.w;
		_desktopHeight = displayMode.h;
	}
#else
	// Query the desktop resolution. We simply hope nothing tried to change
	// the resolution so far.
	const SDL_VideoInfo *videoInfo = SDL_GetVideoInfo();
	if (videoInfo && videoInfo->current_w > 0 && videoInfo->current_h > 0) {
		_desktopWidth  = videoInfo->current_w;
		_desktopHeight = videoInfo->current_h;
	}
#endif
#endif

	if (_graphicsManager == 0) {
#ifdef USE_OPENGL
		// Setup a list with both SDL and OpenGL graphics modes. We only do
		// this whenever the subclass did not already set up an graphics
		// manager yet. This is because we don't know the type of the graphics
		// manager of the subclass, thus we cannot easily switch between the
		// OpenGL one and the set up one. It also is to be expected that the
		// subclass does not want any switching of graphics managers anyway.
		setupGraphicsModes();

		if (ConfMan.hasKey("gfx_mode")) {
			// If the gfx_mode is from OpenGL, create the OpenGL graphics manager
			Common::String gfxMode(ConfMan.get("gfx_mode"));
			for (uint i = _firstGLMode; i < _graphicsModeIds.size(); ++i) {
				if (!scumm_stricmp(_graphicsModes[i].name, gfxMode.c_str())) {
					_graphicsManager = new OpenGLSdlGraphicsManager(_desktopWidth, _desktopHeight, _eventSource, _window);
					_graphicsMode = i;
					break;
				}
			}
		}
#endif

		if (_graphicsManager == 0) {
			_graphicsManager = new SurfaceSdlGraphicsManager(_eventSource, _window);
		}
	}

	if (_savefileManager == 0)
		_savefileManager = new DefaultSaveFileManager();

	if (_mixerManager == 0) {
		_mixerManager = new SdlMixerManager();
		// Setup and start mixer
		_mixerManager->init();
	}

#ifdef ENABLE_EVENTRECORDER
	g_eventRec.registerMixerManager(_mixerManager);

	g_eventRec.registerTimerManager(new SdlTimerManager());
#else
	if (_timerManager == 0)
		_timerManager = new SdlTimerManager();
#endif

	_audiocdManager = createAudioCDManager();

	// Setup a custom program icon.
	_window->setupIcon();

	_inited = true;

	ModularBackend::initBackend();

	// We have to initialize the graphics manager before the event manager
	// so the virtual keyboard can be initialized, but we have to add the
	// graphics manager as an event observer after initializing the event
	// manager.
	dynamic_cast<SdlGraphicsManager *>(_graphicsManager)->activateManager();
}

void OSystem_SDL::engineInit() {
#if SDL_VERSION_ATLEAST(2, 0, 0)
	dynamic_cast<SdlGraphicsManager *>(_graphicsManager)->unlockWindowSize();
#endif
#ifdef USE_TASKBAR
	// Add the started engine to the list of recent tasks
	_taskbarManager->addRecent(ConfMan.getActiveDomainName(), ConfMan.get("description"));

	// Set the overlay icon the current running engine
	_taskbarManager->setOverlayIcon(ConfMan.getActiveDomainName(), ConfMan.get("description"));
#endif
}

void OSystem_SDL::engineDone() {
#if SDL_VERSION_ATLEAST(2, 0, 0)
	dynamic_cast<SdlGraphicsManager *>(_graphicsManager)->unlockWindowSize();
#endif
#ifdef USE_TASKBAR
	// Remove overlay icon
	_taskbarManager->setOverlayIcon("", "");
#endif
}

void OSystem_SDL::initSDL() {
	// Check if SDL has not been initialized
	if (!_initedSDL) {
		// We always initialize the video subsystem because we will need it to
		// be initialized before the graphics managers to retrieve the desktop
		// resolution, for example. WebOS also requires this initialization
		// or otherwise the application won't start.
		uint32 sdlFlags = SDL_INIT_VIDEO;

		if (ConfMan.hasKey("disable_sdl_parachute"))
			sdlFlags |= SDL_INIT_NOPARACHUTE;

		// Initialize SDL (SDL Subsystems are initiliazed in the corresponding sdl managers)
		if (SDL_Init(sdlFlags) == -1)
			error("Could not initialize SDL: %s", SDL_GetError());

		_initedSDL = true;
	}

#ifdef USE_SDL_NET
	// Check if SDL_net has not been initialized
	if (!_initedSDLnet) {
		// Initialize SDL_net
		if (SDLNet_Init() == -1)
			error("Could not initialize SDL_net: %s", SDLNet_GetError());

		_initedSDLnet = true;
	}
#endif
}

void OSystem_SDL::addSysArchivesToSearchSet(Common::SearchSet &s, int priority) {

#ifdef DATA_PATH
	// Add the global DATA_PATH to the directory search list
	// FIXME: We use depth = 4 for now, to match the old code. May want to change that
	Common::FSNode dataNode(DATA_PATH);
	if (dataNode.exists() && dataNode.isDirectory()) {
		s.add(DATA_PATH, new Common::FSDirectory(dataNode, 4), priority);
	}
#endif

}

void OSystem_SDL::setWindowCaption(const char *caption) {
	Common::String cap;
	byte c;

	// The string caption is supposed to be in LATIN-1 encoding.
	// SDL expects UTF-8. So we perform the conversion here.
	while ((c = *(const byte *)caption++)) {
		if (c < 0x80)
			cap += c;
		else {
			cap += 0xC0 | (c >> 6);
			cap += 0x80 | (c & 0x3F);
		}
	}

	_window->setWindowCaption(cap);
}

void OSystem_SDL::quit() {
	destroy();
	exit(0);
}

void OSystem_SDL::fatalError() {
	destroy();
	exit(1);
}


void OSystem_SDL::logMessage(LogMessageType::Type type, const char *message) {
	// First log to stdout/stderr
	FILE *output = 0;

	if (type == LogMessageType::kInfo || type == LogMessageType::kDebug)
		output = stdout;
	else
		output = stderr;

	fputs(message, output);
	fflush(output);

	// Then log into file (via the logger)
	if (_logger)
		_logger->print(message);
}

Common::WriteStream *OSystem_SDL::createLogFile() {
	// Start out by resetting _logFilePath, so that in case
	// of a failure, we know that no log file is open.
	_logFilePath.clear();

	Common::String logFile = getDefaultLogFileName();
	if (logFile.empty())
		return nullptr;

	Common::FSNode file(logFile);
	Common::WriteStream *stream = file.createWriteStream();
	if (stream)
		_logFilePath = logFile;
	return stream;
}

Common::String OSystem_SDL::getSystemLanguage() const {
#if defined(USE_DETECTLANG) && !defined(WIN32)
	// Activating current locale settings
	const Common::String locale = setlocale(LC_ALL, "");

	// Restore default C locale to prevent issues with
	// portability of sscanf(), atof(), etc.
	// See bug #3615148
	setlocale(LC_ALL, "C");

	// Detect the language from the locale
	if (locale.empty()) {
		return ModularBackend::getSystemLanguage();
	} else {
		int length = 0;

		// Strip out additional information, like
		// ".UTF-8" or the like. We do this, since
		// our translation languages are usually
		// specified without any charset information.
		for (int size = locale.size(); length < size; ++length) {
			// TODO: Check whether "@" should really be checked
			// here.
			if (locale[length] == '.' || locale[length] == ' ' || locale[length] == '@')
				break;
		}

		return Common::String(locale.c_str(), length);
	}
#else // USE_DETECTLANG
	return ModularBackend::getSystemLanguage();
#endif // USE_DETECTLANG
}

bool OSystem_SDL::hasTextInClipboard() {
#if SDL_VERSION_ATLEAST(2, 0, 0)
	return SDL_HasClipboardText() == SDL_TRUE;
#else
	return false;
#endif
}

Common::String OSystem_SDL::getTextFromClipboard() {
	if (!hasTextInClipboard()) return "";

#if SDL_VERSION_ATLEAST(2, 0, 0)
	char *text = SDL_GetClipboardText();
	// The string returned by SDL is in UTF-8. Convert to the
	// current TranslationManager encoding or ISO-8859-1.
#ifdef USE_TRANSLATION
	char *conv_text = SDL_iconv_string(TransMan.getCurrentCharset().c_str(), "UTF-8", text, SDL_strlen(text) + 1);
#else
	char *conv_text = SDL_iconv_string("ISO-8859-1", "UTF-8", text, SDL_strlen(text) + 1);
#endif
	if (conv_text) {
		SDL_free(text);
		text = conv_text;
	}
	Common::String strText = text;
	SDL_free(text);

	return strText;
#else
	return "";
#endif
}

bool OSystem_SDL::setTextInClipboard(const Common::String &text) {
#if SDL_VERSION_ATLEAST(2, 0, 0)
	// The encoding we need to use is UTF-8. Assume we currently have the
	// current TranslationManager encoding or ISO-8859-1.
#ifdef USE_TRANSLATION
	char *utf8_text = SDL_iconv_string("UTF-8", TransMan.getCurrentCharset().c_str(), text.c_str(), text.size() + 1);
#else
	char *utf8_text = SDL_iconv_string("UTF-8", "ISO-8859-1", text.c_str(), text.size() + 1);
#endif
	if (utf8_text) {
		int status = SDL_SetClipboardText(utf8_text);
		SDL_free(utf8_text);
		return status == 0;
	}
	return SDL_SetClipboardText(text.c_str()) == 0;
#else
	return false;
#endif
}

uint32 OSystem_SDL::getMillis(bool skipRecord) {
	uint32 millis = SDL_GetTicks();

#ifdef ENABLE_EVENTRECORDER
	g_eventRec.processMillis(millis, skipRecord);
#endif

	return millis;
}

void OSystem_SDL::delayMillis(uint msecs) {
#ifdef ENABLE_EVENTRECORDER
	if (!g_eventRec.processDelayMillis())
#endif
		SDL_Delay(msecs);
}

void OSystem_SDL::getTimeAndDate(TimeDate &td) const {
	time_t curTime = time(0);
	struct tm t = *localtime(&curTime);
	td.tm_sec = t.tm_sec;
	td.tm_min = t.tm_min;
	td.tm_hour = t.tm_hour;
	td.tm_mday = t.tm_mday;
	td.tm_mon = t.tm_mon;
	td.tm_year = t.tm_year;
	td.tm_wday = t.tm_wday;
}

Audio::Mixer *OSystem_SDL::getMixer() {
	assert(_mixerManager);
	return getMixerManager()->getMixer();
}

SdlMixerManager *OSystem_SDL::getMixerManager() {
	assert(_mixerManager);

#ifdef ENABLE_EVENTRECORDER
	return g_eventRec.getMixerManager();
#else
	return _mixerManager;
#endif
}

Common::TimerManager *OSystem_SDL::getTimerManager() {
#ifdef ENABLE_EVENTRECORDER
	return g_eventRec.getTimerManager();
#else
	return _timerManager;
#endif
}

AudioCDManager *OSystem_SDL::createAudioCDManager() {
	// Audio CD support was removed with SDL 2.0
#if SDL_VERSION_ATLEAST(2, 0, 0)
	return new DefaultAudioCDManager();
#else
	return new SdlAudioCDManager();
#endif
}

Common::SaveFileManager *OSystem_SDL::getSavefileManager() {
#ifdef ENABLE_EVENTRECORDER
    return g_eventRec.getSaveManager(_savefileManager);
#else
    return _savefileManager;
#endif
}

//Not specified in base class
Common::String OSystem_SDL::getScreenshotsPath() {
	Common::String path = ConfMan.get("screenshotpath");
	if (!path.empty() && !path.hasSuffix("/"))
		path += "/";
	return path;
}

#ifdef USE_OPENGL

const OSystem::GraphicsMode *OSystem_SDL::getSupportedGraphicsModes() const {
	if (_graphicsModes.empty()) {
		return _graphicsManager->getSupportedGraphicsModes();
	} else {
		return _graphicsModes.begin();
	}
}

int OSystem_SDL::getDefaultGraphicsMode() const {
	if (_graphicsModes.empty()) {
		return _graphicsManager->getDefaultGraphicsMode();
	} else {
		// Return the default graphics mode from the current graphics manager
		if (_graphicsMode < _firstGLMode)
			return _defaultSDLMode;
		else
			return _defaultGLMode;
	}
}

bool OSystem_SDL::setGraphicsMode(int mode) {
	if (_graphicsModes.empty()) {
		return _graphicsManager->setGraphicsMode(mode);
	}

	// Check whether a invalid mode is requested.
	if (mode < 0 || (uint)mode >= _graphicsModeIds.size()) {
		return false;
	}

	// Very hacky way to set up the old graphics manager state, in case we
	// switch from SDL->OpenGL or OpenGL->SDL.
	//
	// This is a probably temporary workaround to fix bugs like #3368143
	// "SDL/OpenGL: Crash when switching renderer backend".
	SdlGraphicsManager *sdlGraphicsManager = dynamic_cast<SdlGraphicsManager *>(_graphicsManager);
	SdlGraphicsManager::State state = sdlGraphicsManager->getState();

	bool switchedManager = false;

	// If the new mode and the current mode are not from the same graphics
	// manager, delete and create the new mode graphics manager
	if (_graphicsMode >= _firstGLMode && mode < _firstGLMode) {
		debug(1, "switching to plain SDL graphics");
		sdlGraphicsManager->deactivateManager();
		delete _graphicsManager;
		_graphicsManager = sdlGraphicsManager = new SurfaceSdlGraphicsManager(_eventSource, _window);

		switchedManager = true;
	} else if (_graphicsMode < _firstGLMode && mode >= _firstGLMode) {
		debug(1, "switching to OpenGL graphics");
		sdlGraphicsManager->deactivateManager();
		delete _graphicsManager;
		_graphicsManager = sdlGraphicsManager = new OpenGLSdlGraphicsManager(_desktopWidth, _desktopHeight, _eventSource, _window);

		switchedManager = true;
	}

	_graphicsMode = mode;

	if (switchedManager) {
		sdlGraphicsManager->activateManager();

		// This failing will probably have bad consequences...
		if (!sdlGraphicsManager->setState(state)) {
			return false;
		}

		// Next setup the cursor again
		CursorMan.pushCursor(0, 0, 0, 0, 0, 0);
		CursorMan.popCursor();

		// Next setup cursor palette if needed
		if (_graphicsManager->getFeatureState(kFeatureCursorPalette)) {
			CursorMan.pushCursorPalette(0, 0, 0);
			CursorMan.popCursorPalette();
		}

		_graphicsManager->beginGFXTransaction();
		// Oh my god if this failed the client code might just explode.
		return _graphicsManager->setGraphicsMode(_graphicsModeIds[mode]);
	} else {
		return _graphicsManager->setGraphicsMode(_graphicsModeIds[mode]);
	}
}

int OSystem_SDL::getGraphicsMode() const {
	if (_graphicsModes.empty()) {
		return _graphicsManager->getGraphicsMode();
	} else {
		return _graphicsMode;
	}
}

void OSystem_SDL::setupGraphicsModes() {
	_graphicsModes.clear();
	_graphicsModeIds.clear();
	_defaultSDLMode = _defaultGLMode = -1;

	// Count the number of graphics modes
	const OSystem::GraphicsMode *srcMode;
	int defaultMode;

	GraphicsManager *manager = new SurfaceSdlGraphicsManager(_eventSource, _window);
	srcMode = manager->getSupportedGraphicsModes();
	defaultMode = manager->getDefaultGraphicsMode();
	while (srcMode->name) {
		if (defaultMode == srcMode->id) {
			_defaultSDLMode = _graphicsModes.size();
		}
		_graphicsModes.push_back(*srcMode);
		srcMode++;
	}
	delete manager;
	assert(_defaultSDLMode != -1);

	_firstGLMode = _graphicsModes.size();
	manager = new OpenGLSdlGraphicsManager(_desktopWidth, _desktopHeight, _eventSource, _window);
	srcMode = manager->getSupportedGraphicsModes();
	defaultMode = manager->getDefaultGraphicsMode();
	while (srcMode->name) {
		if (defaultMode == srcMode->id) {
			_defaultGLMode = _graphicsModes.size();
		}
		_graphicsModes.push_back(*srcMode);
		srcMode++;
	}
	delete manager;
	manager = nullptr;
	assert(_defaultGLMode != -1);

	// Set a null mode at the end
	GraphicsMode nullMode;
	memset(&nullMode, 0, sizeof(nullMode));
	_graphicsModes.push_back(nullMode);

	// Set new internal ids for all modes
	int i = 0;
	OSystem::GraphicsMode *mode = _graphicsModes.begin();
	while (mode->name) {
		_graphicsModeIds.push_back(mode->id);
		mode->id = i++;
		mode++;
	}
}
#endif

#if SDL_VERSION_ATLEAST(2, 0, 0)
int SDL_SetColors(SDL_Surface *surface, SDL_Color *colors, int firstcolor, int ncolors) {
	if (surface->format->palette) {
		return !SDL_SetPaletteColors(surface->format->palette, colors, firstcolor, ncolors) ? 1 : 0;
	} else {
		return 0;
	}
}

int SDL_SetAlpha(SDL_Surface *surface, Uint32 flag, Uint8 alpha) {
	if (SDL_SetSurfaceAlphaMod(surface, alpha)) {
		return -1;
	}

	if (alpha == 255 || !flag) {
		if (SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_NONE)) {
			return -1;
		}
	} else {
		if (SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_BLEND)) {
			return -1;
		}
	}

	return 0;
}

#undef SDL_SetColorKey
int SDL_SetColorKey_replacement(SDL_Surface *surface, Uint32 flag, Uint32 key) {
	return SDL_SetColorKey(surface, SDL_TRUE, key) ? -1 : 0;
}
#endif

char *OSystem_SDL::convertEncoding(const char *to, const char *from, const char *string, size_t length) {
	int zeroBytes = 1;
	if (Common::String(from).hasPrefixIgnoreCase("utf-16"))
		zeroBytes = 2;
	if (Common::String(from).hasPrefixIgnoreCase("utf-32"))
		zeroBytes = 4;

	// SDL_iconv_string() takes char * instead of const char * as it's third parameter
	// with some older versions of SDL.
#if SDL_VERSION_ATLEAST(2, 0, 0)
	return SDL_iconv_string(to, from, string, length + zeroBytes);
#else
	char *stringCopy = (char *) calloc(sizeof(char), length + zeroBytes);
	memcpy(stringCopy, string, length);
	char *result = SDL_iconv_string(to, from, stringCopy, length + zeroBytes);
	free(stringCopy);
	return result;
#endif
}