aboutsummaryrefslogtreecommitdiff
path: root/backends/graphics/openglsdl/openglsdl-graphics.cpp
blob: c5605cae87383b7186c8d0cdf8cab3ec6c0e8597 (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
/* 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.
 *
 */

#include "common/scummsys.h"

#if defined(SDL_BACKEND) && defined(USE_OPENGL)

#include "backends/graphics/openglsdl/openglsdl-graphics.h"
#include "backends/platform/sdl/sdl.h"
#include "common/config-manager.h"
#include "common/textconsole.h"
#include "common/translation.h"

OpenGLSdlGraphicsManager::OpenGLSdlGraphicsManager(SdlEventSource *eventSource)
	:
	SdlGraphicsManager(eventSource),
	_hwscreen(0),
	_screenResized(false),
	_activeFullscreenMode(-2),
	_lastFullscreenModeWidth(0),
	_lastFullscreenModeHeight(0),
	_desktopWidth(0),
	_desktopHeight(0),
	_ignoreResizeFrames(0) {

	// Initialize SDL video subsystem
	if (SDL_InitSubSystem(SDL_INIT_VIDEO) == -1) {
		error("Could not initialize SDL: %s", SDL_GetError());
	}

	// This is also called in initSDL(), but initializing graphics
	// may reset it.
	SDL_EnableUNICODE(1);

	// Disable OS cursor
	SDL_ShowCursor(SDL_DISABLE);

	// Get desktop resolution
	// TODO: In case the OpenGL manager is created *after* a plain SDL manager
	// has been used, this will return the last setup graphics mode rather
	// than the desktop resolution. We should really look into a way to
	// properly retrieve the desktop resolution.
	const SDL_VideoInfo *videoInfo = SDL_GetVideoInfo();
	if (videoInfo->current_w > 0 && videoInfo->current_h > 0) {
		_desktopWidth = videoInfo->current_w;
		_desktopHeight = videoInfo->current_h;
	}

	if (ConfMan.hasKey("last_fullscreen_mode_width") && ConfMan.hasKey("last_fullscreen_mode_height")) {
		_lastFullscreenModeWidth = ConfMan.getInt("last_fullscreen_mode_width");
		_lastFullscreenModeHeight = ConfMan.getInt("last_fullscreen_mode_height");
	}
}

OpenGLSdlGraphicsManager::~OpenGLSdlGraphicsManager() {
	// Unregister the event observer
	if (g_system->getEventManager()->getEventDispatcher() != NULL)
		g_system->getEventManager()->getEventDispatcher()->unregisterObserver(this);
}

void OpenGLSdlGraphicsManager::initEventObserver() {
	// Register the graphics manager as a event observer
	g_system->getEventManager()->getEventDispatcher()->registerObserver(this, 10, false);
}

bool OpenGLSdlGraphicsManager::hasFeature(OSystem::Feature f) {
	return
		(f == OSystem::kFeatureFullscreenMode) ||
		(f == OSystem::kFeatureIconifyWindow) ||
		OpenGLGraphicsManager::hasFeature(f);
}

void OpenGLSdlGraphicsManager::setFeatureState(OSystem::Feature f, bool enable) {
	switch (f) {
	case OSystem::kFeatureIconifyWindow:
		if (enable)
			SDL_WM_IconifyWindow();
		break;
	default:
		OpenGLGraphicsManager::setFeatureState(f, enable);
	}
}

#ifdef USE_RGB_COLOR

Common::List<Graphics::PixelFormat> OpenGLSdlGraphicsManager::getSupportedFormats() const {
	assert(!_supportedFormats.empty());
	return _supportedFormats;
}

void OpenGLSdlGraphicsManager::detectSupportedFormats() {

	// Clear old list
	_supportedFormats.clear();

	// Some tables with standard formats that we always list
	// as "supported". If frontend code tries to use one of
	// these, we will perform the necessary format
	// conversion in the background. Of course this incurs a
	// performance hit, but on desktop ports this should not
	// matter. We still push the currently active format to
	// the front, so if frontend code just uses the first
	// available format, it will get one that is "cheap" to
	// use.
	const Graphics::PixelFormat RGBList[] = {
#if defined(ENABLE_32BIT)
		Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0), // RGBA8888
#ifndef USE_GLES
		Graphics::PixelFormat(4, 8, 8, 8, 8, 16, 8, 0, 24), // ARGB8888
#endif
		Graphics::PixelFormat(3, 8, 8, 8, 0, 16, 8, 0, 0),  // RGB888
#endif
		Graphics::PixelFormat(2, 5, 6, 5, 0, 11, 5, 0, 0),  // RGB565
		Graphics::PixelFormat(2, 5, 5, 5, 1, 11, 6, 1, 0),  // RGB5551
		Graphics::PixelFormat(2, 5, 5, 5, 0, 10, 5, 0, 0),  // RGB555
		Graphics::PixelFormat(2, 4, 4, 4, 4, 12, 8, 4, 0),  // RGBA4444
#ifndef USE_GLES
		Graphics::PixelFormat(2, 4, 4, 4, 4, 8, 4, 0, 12)   // ARGB4444
#endif
	};
#ifndef USE_GLES
	const Graphics::PixelFormat BGRList[] = {
#ifdef ENABLE_32BIT
		Graphics::PixelFormat(4, 8, 8, 8, 8, 0, 8, 16, 24), // ABGR8888
		Graphics::PixelFormat(4, 8, 8, 8, 8, 8, 16, 24, 0), // BGRA8888
		Graphics::PixelFormat(3, 8, 8, 8, 0, 0, 8, 16, 0),  // BGR888
#endif
		Graphics::PixelFormat(2, 5, 6, 5, 0, 0, 5, 11, 0),  // BGR565
		Graphics::PixelFormat(2, 5, 5, 5, 1, 1, 6, 11, 0),  // BGRA5551
		Graphics::PixelFormat(2, 4, 4, 4, 4, 0, 4, 8, 12),  // ABGR4444
		Graphics::PixelFormat(2, 4, 4, 4, 4, 4, 8, 12, 0)   // BGRA4444
	};
#endif

	Graphics::PixelFormat format = Graphics::PixelFormat::createFormatCLUT8();
	if (_hwscreen) {
		// Get our currently set hardware format
		format = Graphics::PixelFormat(_hwscreen->format->BytesPerPixel,
			8 - _hwscreen->format->Rloss, 8 - _hwscreen->format->Gloss,
			8 - _hwscreen->format->Bloss, 8 - _hwscreen->format->Aloss,
			_hwscreen->format->Rshift, _hwscreen->format->Gshift,
			_hwscreen->format->Bshift, _hwscreen->format->Ashift);

		// Workaround to SDL not providing an accurate Aloss value on Mac OS X.
		if (_hwscreen->format->Amask == 0)
			format.aLoss = 8;

		// Push it first, as the prefered format if available
		for (int i = 0; i < ARRAYSIZE(RGBList); i++) {
			if (RGBList[i] == format) {
				_supportedFormats.push_back(format);
				break;
			}
		}
#ifndef USE_GLES
		for (int i = 0; i < ARRAYSIZE(BGRList); i++) {
			if (BGRList[i] == format) {
				_supportedFormats.push_back(format);
				break;
			}
		}
#endif
	}

	// Push some RGB formats
	for (int i = 0; i < ARRAYSIZE(RGBList); i++) {
		if (_hwscreen && (RGBList[i].bytesPerPixel > format.bytesPerPixel))
			continue;
		if (RGBList[i] != format)
			_supportedFormats.push_back(RGBList[i]);
	}
#ifndef USE_GLES
	// Push some BGR formats
	for (int i = 0; i < ARRAYSIZE(BGRList); i++) {
		if (_hwscreen && (BGRList[i].bytesPerPixel > format.bytesPerPixel))
			continue;
		if (BGRList[i] != format)
			_supportedFormats.push_back(BGRList[i]);
	}
#endif
	_supportedFormats.push_back(Graphics::PixelFormat::createFormatCLUT8());
}

#endif

void OpenGLSdlGraphicsManager::setInternalMousePosition(int x, int y) {
	SDL_WarpMouse(x, y);
}

void OpenGLSdlGraphicsManager::updateScreen() {
	if (_ignoreResizeFrames)
		_ignoreResizeFrames -= 1;

	OpenGLGraphicsManager::updateScreen();
}

//
// Intern
//

bool OpenGLSdlGraphicsManager::setupFullscreenMode() {
	SDL_Rect const* const*availableModes = SDL_ListModes(NULL, SDL_FULLSCREEN | SDL_OPENGL);

	// SDL_ListModes() returns -1 in case any dimension is okay. In that
	// case we'll reuse the current desktop resolution for fullscreen.
	if (availableModes == (void *)-1) {
		_videoMode.hardwareWidth = _desktopWidth;
		_videoMode.hardwareHeight = _desktopHeight;
		_activeFullscreenMode = -2;
		return true;
	}

	// If -2, autodetect the fullscreen mode
	// The last used fullscreen mode will be prioritized, if there is no last fullscreen
	// mode, the desktop resolution will be used, and in case the desktop resolution
	// is not available as a fullscreen mode, the one with smallest metric will be selected.
	if (_activeFullscreenMode == -2) {
		// Desktop resolution
		int desktopModeIndex = -1;

		// Best metric mode
		const SDL_Rect *bestMode = availableModes[0];
		int bestModeIndex = 0;
		uint bestMetric = (uint)-1;

		// Iterate over all available fullscreen modes
		for (int i = 0; const SDL_Rect *mode = availableModes[i]; i++) {
			// Try to setup the last used fullscreen mode
			if (mode->w == _lastFullscreenModeWidth && mode->h == _lastFullscreenModeHeight) {
				_videoMode.hardwareWidth = _lastFullscreenModeWidth;
				_videoMode.hardwareHeight = _lastFullscreenModeHeight;
				_activeFullscreenMode = i;
				return true;
			}

			if (mode->w == _desktopWidth && mode->h == _desktopHeight)
				desktopModeIndex = i;

			if (mode->w < _videoMode.overlayWidth)
				continue;
			if (mode->h < _videoMode.overlayHeight)
				continue;

			uint metric = mode->w * mode->h - _videoMode.overlayWidth * _videoMode.overlayHeight;
			if (metric < bestMetric) {
				bestMode = mode;
				bestMetric = metric;
				bestModeIndex = i;
			}
		}

		if (desktopModeIndex >= 0) {
			_videoMode.hardwareWidth = _desktopWidth;
			_videoMode.hardwareHeight = _desktopHeight;

			_activeFullscreenMode = desktopModeIndex;
			return true;
		} else if (bestMode) {
			_videoMode.hardwareWidth = bestMode->w;
			_videoMode.hardwareHeight = bestMode->h;

			_activeFullscreenMode = bestModeIndex;
			return true;
		}
	} else {
		// Use last fullscreen mode if looping backwards from the first mode
		if (_activeFullscreenMode == -1) {
			do {
				_activeFullscreenMode++;
			} while(availableModes[_activeFullscreenMode]);
			_activeFullscreenMode--;
		}

		// Use first fullscreen mode if looping from last mode
		if (!availableModes[_activeFullscreenMode])
			_activeFullscreenMode = 0;

		// Check if the fullscreen mode is valid
		if (availableModes[_activeFullscreenMode]) {
			_videoMode.hardwareWidth = availableModes[_activeFullscreenMode]->w;
			_videoMode.hardwareHeight = availableModes[_activeFullscreenMode]->h;
			return true;
		}
	}

	// Could not find any suiting fullscreen mode, return false.
	return false;
}

bool OpenGLSdlGraphicsManager::loadGFXMode() {
	// If the screen was resized, do not change its size
	if (!_screenResized) {
		const int scaleFactor = getScale();
		_videoMode.overlayWidth = _videoMode.hardwareWidth = _videoMode.screenWidth * scaleFactor;
		_videoMode.overlayHeight = _videoMode.hardwareHeight = _videoMode.screenHeight * scaleFactor;

		// The only modes where we need to adapt the aspect ratio are 320x200
		// and 640x400. That is since our aspect ratio correction in fact is
		// only used to ensure that the original pixel size aspect for these
		// modes is used.
		// (Non-square pixels on old monitors vs square pixel on new ones).
		if (_videoMode.aspectRatioCorrection) {
		 	if (_videoMode.screenWidth == 320 && _videoMode.screenHeight == 200)
				_videoMode.overlayHeight = _videoMode.hardwareHeight = 240 * scaleFactor;
			else if (_videoMode.screenWidth == 640 && _videoMode.screenHeight == 400)
				_videoMode.overlayHeight = _videoMode.hardwareHeight = 480 * scaleFactor;
		}
	}

	_screenResized = false;

	// Setup OpenGL attributes for SDL
	SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
	SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
	SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
	SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
	SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);

	const bool isFullscreen = getFullscreenMode();

	// In case we have an fullscreen mode and we are not in a rollback, detect
	// a proper mode to use. In case we are in a rollback, we already detected
	// a proper mode when setting up that mode, thus there is no need to run
	// the detection again.
	if (isFullscreen && _transactionMode != kTransactionRollback) {
		if (!setupFullscreenMode())
			// Failed setuping a fullscreen mode
			return false;
	}

	_videoMode.overlayWidth = _videoMode.hardwareWidth;
	_videoMode.overlayHeight = _videoMode.hardwareHeight;

	uint32 flags = SDL_OPENGL;

	if (isFullscreen)
		flags |= SDL_FULLSCREEN;
	else
		flags |= SDL_RESIZABLE;

	// Create our window
	_hwscreen = SDL_SetVideoMode(_videoMode.hardwareWidth, _videoMode.hardwareHeight, 32, flags);
#ifdef USE_RGB_COLOR
	detectSupportedFormats();
#endif

	if (_hwscreen == NULL) {
		// DON'T use error(), as this tries to bring up the debug
		// console, which WON'T WORK now that _hwscreen is hosed.

		if (!_oldVideoMode.setup) {
			warning("SDL_SetVideoMode says we can't switch to that mode (%s)", SDL_GetError());
			g_system->quit();
		} else
			// Cancel GFX load, and go back to last mode
			return false;
	}

	// Check if the screen is BGR format
	setFormatIsBGR(_hwscreen->format->Rshift != 0);

	if (isFullscreen) {
		_lastFullscreenModeWidth = _videoMode.hardwareWidth;
		_lastFullscreenModeHeight = _videoMode.hardwareHeight;
		ConfMan.setInt("last_fullscreen_mode_width", _lastFullscreenModeWidth);
		ConfMan.setInt("last_fullscreen_mode_height", _lastFullscreenModeHeight);
	}

	// Call and return parent implementation of this method
	return OpenGLGraphicsManager::loadGFXMode();
}

void OpenGLSdlGraphicsManager::unloadGFXMode() {
	if (_hwscreen) {
		SDL_FreeSurface(_hwscreen);
		_hwscreen = NULL;
	}
}

void OpenGLSdlGraphicsManager::internUpdateScreen() {
	// Call to parent implementation of this method
	OpenGLGraphicsManager::internUpdateScreen();

	// Swap OpenGL buffers
	SDL_GL_SwapBuffers();
}

#ifdef USE_OSD
void OpenGLSdlGraphicsManager::displayModeChangedMsg() {
	const char *newModeName = getCurrentModeName();
	if (newModeName) {
		const int scaleFactor = getScale();

		Common::String osdMessage = Common::String::format(
			"%s: %s\n%d x %d -> %d x %d",
			_("Current display mode"),
			newModeName,
			_videoMode.screenWidth * scaleFactor,
			_videoMode.screenHeight * scaleFactor,
			_hwscreen->w, _hwscreen->h
			);
		displayMessageOnOSD(osdMessage.c_str());
	}
}
void OpenGLSdlGraphicsManager::displayScaleChangedMsg() {
	const int scaleFactor = getScale();
	Common::String osdMessage = Common::String::format(
		"%s: x%d\n%d x %d -> %d x %d",
		_("Current scale"),
		scaleFactor,
		_videoMode.screenWidth, _videoMode.screenHeight,
		_videoMode.overlayWidth, _videoMode.overlayHeight
		);
	displayMessageOnOSD(osdMessage.c_str());
}
#endif

bool OpenGLSdlGraphicsManager::isHotkey(const Common::Event &event) {
	if ((event.kbd.flags & (Common::KBD_CTRL|Common::KBD_ALT)) == (Common::KBD_CTRL|Common::KBD_ALT)) {
		if (event.kbd.keycode == Common::KEYCODE_PLUS || event.kbd.keycode == Common::KEYCODE_MINUS ||
			event.kbd.keycode == Common::KEYCODE_KP_PLUS || event.kbd.keycode == Common::KEYCODE_KP_MINUS ||
			event.kbd.keycode == 'a' || event.kbd.keycode == 'f')
			return true;
	} else if ((event.kbd.flags & (Common::KBD_CTRL|Common::KBD_SHIFT)) == (Common::KBD_CTRL|Common::KBD_SHIFT)) {
		if (event.kbd.keycode == 'a' || event.kbd.keycode == 'f')
			return true;
	} else if ((event.kbd.flags & (Common::KBD_ALT)) == (Common::KBD_ALT) && event.kbd.keycode == 's') {
		return true;
	}
	return false;
}

void OpenGLSdlGraphicsManager::toggleFullScreen(int loop) {
	beginGFXTransaction();
		const bool isFullscreen = getFullscreenMode();

		if (isFullscreen && loop) {
			_activeFullscreenMode += loop;
			setFullscreenMode(true);
		} else {
			_activeFullscreenMode = -2;
			setFullscreenMode(!isFullscreen);
		}

		// HACK: We need to force a refresh here, since we change the
		// fullscreen mode.
		_transactionDetails.needRefresh = true;
	endGFXTransaction();

	// Ignore resize events for the next 10 frames
	_ignoreResizeFrames = 10;

#ifdef USE_OSD
	Common::String osdMessage;
	if (getFullscreenMode())
		osdMessage = Common::String::format("%s\n%d x %d",
			_("Fullscreen mode"),
			_hwscreen->w, _hwscreen->h
			);
	else
		osdMessage = Common::String::format("%s\n%d x %d",
			_("Windowed mode"),
			_hwscreen->w, _hwscreen->h
			);
	displayMessageOnOSD(osdMessage.c_str());
#endif
}

bool OpenGLSdlGraphicsManager::notifyEvent(const Common::Event &event) {
	switch (event.type) {
	case Common::EVENT_KEYDOWN:
		if (event.kbd.hasFlags(Common::KBD_ALT)) {
			// Alt-Return and Alt-Enter toggle full screen mode
			if (event.kbd.keycode == Common::KEYCODE_RETURN ||
				event.kbd.keycode == (Common::KeyCode)SDLK_KP_ENTER) {
				toggleFullScreen(0);
				return true;
			}

			// Alt-S create a screenshot
			if (event.kbd.keycode == 's') {
				Common::String filename;

				for (int n = 0;; n++) {
					SDL_RWops *file;

					filename = Common::String::format("scummvm%05d.bmp", n);
					file = SDL_RWFromFile(filename.c_str(), "r");
					if (!file)
						break;
					SDL_RWclose(file);
				}
				if (saveScreenshot(filename.c_str()))
					debug("Saved screenshot '%s'", filename.c_str());
				else
					warning("Could not save screenshot");
				return true;
			}
		}

		if (event.kbd.hasFlags(Common::KBD_CTRL|Common::KBD_ALT)) {
			// Ctrl-Alt-Return and Ctrl-Alt-Enter switch between full screen modes
			if (event.kbd.keycode == Common::KEYCODE_RETURN ||
				event.kbd.keycode == (Common::KeyCode)SDLK_KP_ENTER) {
				toggleFullScreen(1);
				return true;
			}

			// Ctrl-Alt-a switch between display modes
			if (event.kbd.keycode == 'a') {
				beginGFXTransaction();
					setFeatureState(OSystem::kFeatureAspectRatioCorrection, !getFeatureState(OSystem::kFeatureAspectRatioCorrection));
				endGFXTransaction();
#ifdef USE_OSD
			Common::String osdMessage;
			if (getFeatureState(OSystem::kFeatureAspectRatioCorrection))
				osdMessage = Common::String::format("%s\n%d x %d -> %d x %d",
				        _("Enabled aspect ratio correction"),
				        _videoMode.screenWidth, _videoMode.screenHeight,
				        _hwscreen->w, _hwscreen->h);
			else
				osdMessage = Common::String::format("%s\n%d x %d -> %d x %d",
				        _("Disabled aspect ratio correction"),
				        _videoMode.screenWidth, _videoMode.screenHeight,
				        _hwscreen->w, _hwscreen->h);
			displayMessageOnOSD(osdMessage.c_str());
#endif
				internUpdateScreen();
				return true;
			}

			// Ctrl-Alt-f toggles antialiasing
			if (event.kbd.keycode == 'f') {
				beginGFXTransaction();
					toggleAntialiasing();
				endGFXTransaction();

#ifdef USE_OSD
				// TODO: This makes guesses about what internal antialiasing
				// modes we use, we might want to consider a better way of
				// displaying information to the user.
				if (getAntialiasingState())
					displayMessageOnOSD(_("Active filter mode: Linear"));
				else
					displayMessageOnOSD(_("Active filter mode: Nearest"));
#endif
				return true;
			}

			SDLKey sdlKey = (SDLKey)event.kbd.keycode;

			// Ctrl+Alt+Plus/Minus Increase/decrease the scale factor
			if ((sdlKey == SDLK_EQUALS || sdlKey == SDLK_PLUS || sdlKey == SDLK_MINUS ||
				sdlKey == SDLK_KP_PLUS || sdlKey == SDLK_KP_MINUS)) {
				int factor = getScale();
				factor += (sdlKey == SDLK_MINUS || sdlKey == SDLK_KP_MINUS) ? -1 : +1;
				if (0 < factor && factor < 4) {
					// Check if the desktop resolution has been detected
					if (_desktopWidth > 0 && _desktopHeight > 0)
						// If the new scale factor is too big, do not scale
						if (_videoMode.screenWidth * factor > _desktopWidth ||
							_videoMode.screenHeight * factor > _desktopHeight)
							return false;

					beginGFXTransaction();
						setScale(factor);
					endGFXTransaction();
#ifdef USE_OSD
					displayScaleChangedMsg();
#endif
					return true;
				}
			}

			const bool isNormalNumber = (SDLK_1 <= sdlKey && sdlKey <= SDLK_3);
			const bool isKeypadNumber = (SDLK_KP1 <= sdlKey && sdlKey <= SDLK_KP3);

			// Ctrl-Alt-<number key> will change the GFX mode
			if (isNormalNumber || isKeypadNumber) {
				if (sdlKey - (isNormalNumber ? SDLK_1 : SDLK_KP1) <= 3) {
#ifdef USE_OSD
					int lastMode = _videoMode.mode;
#endif
					// We need to query the scale and set it up, because
					// setGraphicsMode sets the default scale to 2
					int oldScale = getScale();
					beginGFXTransaction();
						setGraphicsMode(sdlKey - (isNormalNumber ? SDLK_1 : SDLK_KP1));
						setScale(oldScale);
					endGFXTransaction();
#ifdef USE_OSD
					if (lastMode != _videoMode.mode)
						displayModeChangedMsg();
#endif
					internUpdateScreen();
				}
			}
		}

		if (event.kbd.hasFlags(Common::KBD_CTRL|Common::KBD_SHIFT)) {
			// Ctrl-Shift-Return and Ctrl-Shift-Enter switch backwards between full screen modes
			if (event.kbd.keycode == Common::KEYCODE_RETURN ||
				event.kbd.keycode == (Common::KeyCode)SDLK_KP_ENTER) {
				toggleFullScreen(-1);
				return true;
			}
		}
		break;

	case Common::EVENT_KEYUP:
		return isHotkey(event);

	default:
		break;
	}

	return false;
}

void OpenGLSdlGraphicsManager::notifyVideoExpose() {
}

void OpenGLSdlGraphicsManager::notifyResize(const uint width, const uint height) {
	// Do not resize if ignoring resize events.
	if (!_ignoreResizeFrames && !getFullscreenMode()) {
		bool scaleChanged = false;
		beginGFXTransaction();
			_videoMode.hardwareWidth = width;
			_videoMode.hardwareHeight = height;

			_screenResized = true;

			int scale = MIN(_videoMode.hardwareWidth / _videoMode.screenWidth,
			                _videoMode.hardwareHeight / _videoMode.screenHeight);

			if (getScale() != scale) {
				scaleChanged = true;
				setScale(MAX(MIN(scale, 3), 1));
			}

			_transactionDetails.sizeChanged = true;
		endGFXTransaction();
#ifdef USE_OSD
		if (scaleChanged)
			displayScaleChangedMsg();
#endif
	}
}

void OpenGLSdlGraphicsManager::transformMouseCoordinates(Common::Point &point) {
	adjustMousePosition(point.x, point.y);
}

void OpenGLSdlGraphicsManager::notifyMousePos(Common::Point mouse) {
	setMousePosition(mouse.x, mouse.y);
}

#endif