aboutsummaryrefslogtreecommitdiff
path: root/backends/graphics/linuxmotosdl/linuxmotosdl-graphics.cpp
blob: 22b271ae1aa98e5f210f7670405f0510c438ba27 (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
/* 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(LINUXMOTO)

#include "backends/graphics/linuxmotosdl/linuxmotosdl-graphics.h"
#include "backends/events/linuxmotosdl/linuxmotosdl-events.h"
#include "common/mutex.h"
#include "common/textconsole.h"
#include "graphics/font.h"
#include "graphics/fontman.h"
#include "graphics/scaler.h"
#include "graphics/scaler/aspect.h"
#include "graphics/scaler/downscaler.h"
#include "graphics/surface.h"

enum {
	GFX_HALF = 12
};

static const OSystem::GraphicsMode s_supportedGraphicsModes[] = {
	{"1x", "Fullscreen", GFX_NORMAL},
	{"�x", "Downscale", GFX_HALF},
	{0, 0, 0}
};

LinuxmotoSdlGraphicsManager::LinuxmotoSdlGraphicsManager(SdlEventSource *sdlEventSource)
 : SurfaceSdlGraphicsManager(sdlEventSource) {
}

const OSystem::GraphicsMode *LinuxmotoSdlGraphicsManager::getSupportedGraphicsModes() const {
	return s_supportedGraphicsModes;
}

int LinuxmotoSdlGraphicsManager::getDefaultGraphicsMode() const {
	return GFX_NORMAL;
}

bool LinuxmotoSdlGraphicsManager::setGraphicsMode(int mode) {
	Common::StackLock lock(_graphicsMutex);

	assert(_transactionMode == kTransactionActive);

	if (_oldVideoMode.setup && _oldVideoMode.mode == mode)
		return true;

	int newScaleFactor = 1;

	switch (mode) {
	case GFX_NORMAL:
		newScaleFactor = 1;
		break;
	case GFX_HALF:
		newScaleFactor = 1;
		break;
	default:
		warning("unknown gfx mode %d", mode);
		return false;
	}

	_transactionDetails.normal1xScaler = (mode == GFX_NORMAL);
	if (_oldVideoMode.setup && _oldVideoMode.scaleFactor != newScaleFactor)
		_transactionDetails.needHotswap = true;

	_transactionDetails.needUpdatescreen = true;

	_videoMode.mode = mode;
	_videoMode.scaleFactor = newScaleFactor;

	return true;
}

void LinuxmotoSdlGraphicsManager::setGraphicsModeIntern() {
	Common::StackLock lock(_graphicsMutex);
	ScalerProc *newScalerProc = 0;

	switch (_videoMode.mode) {
	case GFX_NORMAL:
		newScalerProc = Normal1x;
		break;
	case GFX_HALF:
		newScalerProc = DownscaleAllByHalf;
		break;

	default:
		error("Unknown gfx mode %d", _videoMode.mode);
	}

	_scalerProc = newScalerProc;

	if (!_screen || !_hwscreen)
		return;

	// Blit everything to the screen
	_forceFull = true;

	// Even if the old and new scale factors are the same, we may have a
	// different scaler for the cursor now.
	blitCursor();
}


void LinuxmotoSdlGraphicsManager::initSize(uint w, uint h) {
	assert(_transactionMode == kTransactionActive);

	// Avoid redundant res changes
	if ((int)w == _videoMode.screenWidth && (int)h == _videoMode.screenHeight)
		return;

	_videoMode.screenWidth = w;
	_videoMode.screenHeight = h;

	if	(w > 320 || h > 240) {
		setGraphicsMode(GFX_HALF);
		setGraphicsModeIntern();
		_eventSource->toggleMouseGrab();
	}

	_transactionDetails.sizeChanged = true;
}

bool LinuxmotoSdlGraphicsManager::loadGFXMode() {
	debug("Game ScreenMode = %d*%d",_videoMode.screenWidth, _videoMode.screenHeight);
	if (_videoMode.screenWidth > 320 || _videoMode.screenHeight > 240) {
		_videoMode.aspectRatioCorrection = false;
		setGraphicsMode(GFX_HALF);
		debug("GraphicsMode set to HALF");
	} else {
		setGraphicsMode(GFX_NORMAL);
		debug("GraphicsMode set to NORMAL");
	}
	if (_videoMode.mode == GFX_HALF && !_overlayVisible) {
		_videoMode.overlayWidth = 320;
		_videoMode.overlayHeight = 240;
		_videoMode.fullscreen = true;
	} else {

		_videoMode.overlayWidth = _videoMode.screenWidth * _videoMode.scaleFactor;
		_videoMode.overlayHeight = _videoMode.screenHeight * _videoMode.scaleFactor;

		if (_videoMode.aspectRatioCorrection)
			_videoMode.overlayHeight = real2Aspect(_videoMode.overlayHeight);

		_videoMode.hardwareWidth = _videoMode.screenWidth * _videoMode.scaleFactor;
		_videoMode.hardwareHeight = effectiveScreenHeight();
	}

	return SurfaceSdlGraphicsManager::loadGFXMode();
}

void LinuxmotoSdlGraphicsManager::drawMouse() {
	if (!_mouseVisible || !_mouseSurface) {
		_mouseBackup.x = _mouseBackup.y = _mouseBackup.w = _mouseBackup.h = 0;
		return;
	}

	SDL_Rect dst;
	int scale;
	int hotX, hotY;

	if (_videoMode.mode == GFX_HALF && !_overlayVisible) {
		dst.x = _mouseCurState.x/2;
		dst.y = _mouseCurState.y/2;
	} else {
		dst.x = _mouseCurState.x;
		dst.y = _mouseCurState.y;
	}

	if (!_overlayVisible) {
		scale = _videoMode.scaleFactor;
		dst.w = _mouseCurState.vW;
		dst.h = _mouseCurState.vH;
		hotX = _mouseCurState.vHotX;
		hotY = _mouseCurState.vHotY;
	} else {
		scale = 1;
		dst.w = _mouseCurState.rW;
		dst.h = _mouseCurState.rH;
		hotX = _mouseCurState.rHotX;
		hotY = _mouseCurState.rHotY;
	}

	// The mouse is undrawn using virtual coordinates, i.e. they may be
	// scaled and aspect-ratio corrected.

	_mouseBackup.x = dst.x - hotX;
	_mouseBackup.y = dst.y - hotY;
	_mouseBackup.w = dst.w;
	_mouseBackup.h = dst.h;

	// We draw the pre-scaled cursor image, so now we need to adjust for
	// scaling, shake position and aspect ratio correction manually.

	if (!_overlayVisible) {
		dst.y += _currentShakePos;
	}

	if (_videoMode.aspectRatioCorrection && !_overlayVisible)
		dst.y = real2Aspect(dst.y);

	dst.x = scale * dst.x - _mouseCurState.rHotX;
	dst.y = scale * dst.y - _mouseCurState.rHotY;
	dst.w = _mouseCurState.rW;
	dst.h = _mouseCurState.rH;

	// Note that SDL_BlitSurface() and addDirtyRect() will both perform any
	// clipping necessary

	if (SDL_BlitSurface(_mouseSurface, NULL, _hwscreen, &dst) != 0)
		error("SDL_BlitSurface failed: %s", SDL_GetError());

	// The screen will be updated using real surface coordinates, i.e.
	// they will not be scaled or aspect-ratio corrected.
	addDirtyRect(dst.x, dst.y, dst.w, dst.h, true);
}

void LinuxmotoSdlGraphicsManager::undrawMouse() {
	const int x = _mouseBackup.x;
	const int y = _mouseBackup.y;

	// When we switch bigger overlay off mouse jumps. Argh!
	// This is intended to prevent undrawing offscreen mouse
	if (!_overlayVisible && (x >= _videoMode.screenWidth || y >= _videoMode.screenHeight))
		return;

	if (_mouseBackup.w != 0 && _mouseBackup.h != 0) {
		if (_videoMode.mode == GFX_HALF && !_overlayVisible) {
			addDirtyRect(x*2, y*2, _mouseBackup.w*2, _mouseBackup.h*2);
		} else {
			addDirtyRect(x, y, _mouseBackup.w, _mouseBackup.h);
		}
	}
}

void LinuxmotoSdlGraphicsManager::internUpdateScreen() {
	SDL_Surface *srcSurf, *origSurf;
	int height, width;
	ScalerProc *scalerProc;
	int scale1;

#if defined(DEBUG) // definitions not available for non-DEBUG here. (needed this to compile in SYMBIAN32 & linux?)
	assert(_hwscreen != NULL);
	assert(_hwscreen->map->sw_data != NULL);
#endif

	// If the shake position changed, fill the dirty area with blackness
	if (_currentShakePos != _newShakePos) {
		SDL_Rect blackrect = {0, 0, _videoMode.screenWidth * _videoMode.scaleFactor, _newShakePos * _videoMode.scaleFactor};

		if (_videoMode.aspectRatioCorrection && !_overlayVisible)
			blackrect.h = real2Aspect(blackrect.h - 1) + 1;

		SDL_FillRect(_hwscreen, &blackrect, 0);

		_currentShakePos = _newShakePos;

		_forceFull = true;
	}

	// Check whether the palette was changed in the meantime and update the
	// screen surface accordingly.
	if (_screen && _paletteDirtyEnd != 0) {
		SDL_SetColors(_screen, _currentPalette + _paletteDirtyStart,
			_paletteDirtyStart,
			_paletteDirtyEnd - _paletteDirtyStart);

		_paletteDirtyEnd = 0;

		_forceFull = true;
	}

#ifdef USE_OSD
	// OSD visible (i.e. non-transparent)?
	if (_osdAlpha != SDL_ALPHA_TRANSPARENT) {
		// Updated alpha value
		const int diff = SDL_GetTicks() - _osdFadeStartTime;
		if (diff > 0) {
			if (diff >= kOSDFadeOutDuration) {
				// Back to full transparency
				_osdAlpha = SDL_ALPHA_TRANSPARENT;
			} else {
				// Do a linear fade out...
				const int startAlpha = SDL_ALPHA_TRANSPARENT + kOSDInitialAlpha * (SDL_ALPHA_OPAQUE - SDL_ALPHA_TRANSPARENT) / 100;
				_osdAlpha = startAlpha + diff * (SDL_ALPHA_TRANSPARENT - startAlpha) / kOSDFadeOutDuration;
			}
			SDL_SetAlpha(_osdSurface, SDL_RLEACCEL | SDL_SRCCOLORKEY | SDL_SRCALPHA, _osdAlpha);
			_forceFull = true;
		}
	}
#endif

	if (!_overlayVisible) {
		origSurf = _screen;
		srcSurf = _tmpscreen;
		width = _videoMode.screenWidth;
		height = _videoMode.screenHeight;
		scalerProc = _scalerProc;
		scale1 = _videoMode.scaleFactor;
	} else {
		origSurf = _overlayscreen;
		srcSurf = _tmpscreen2;
		width = _videoMode.overlayWidth;
		height = _videoMode.overlayHeight;
		scalerProc = Normal1x;
		scale1 = 1;
	}

	// Add the area covered by the mouse cursor to the list of dirty rects if
	// we have to redraw the mouse.
	if (_mouseNeedsRedraw)
		undrawMouse();

	// Force a full redraw if requested
	if (_forceFull) {
		_numDirtyRects = 1;
		_dirtyRectList[0].x = 0;
		_dirtyRectList[0].y = 0;
		_dirtyRectList[0].w = width;
		_dirtyRectList[0].h = height;
	}

	// Only draw anything if necessary
	if (_numDirtyRects > 0 || _mouseNeedsRedraw) {
		SDL_Rect *r;
		SDL_Rect dst;
		uint32 srcPitch, dstPitch;
		SDL_Rect *lastRect = _dirtyRectList + _numDirtyRects;

		for (r = _dirtyRectList; r != lastRect; ++r) {
			dst = *r;
			dst.x++;	// Shift rect by one since 2xSai needs to access the data around
			dst.y++;	// any pixel to scale it, and we want to avoid mem access crashes.

			if (SDL_BlitSurface(origSurf, r, srcSurf, &dst) != 0)
				error("SDL_BlitSurface failed: %s", SDL_GetError());
		}

		SDL_LockSurface(srcSurf);
		SDL_LockSurface(_hwscreen);

		srcPitch = srcSurf->pitch;
		dstPitch = _hwscreen->pitch;

		for (r = _dirtyRectList; r != lastRect; ++r) {
			register int dst_y = r->y + _currentShakePos;
			register int dst_h = 0;
			register int dst_w = r->w;
			register int orig_dst_y = 0;
			register int dst_x = r->x;
			register int src_y;
			register int src_x;

			if (dst_y < height) {
				dst_h = r->h;
				if (dst_h > height - dst_y)
					dst_h = height - dst_y;

				orig_dst_y = dst_y;
				src_x = dst_x;
				src_y = dst_y;

				if (_videoMode.aspectRatioCorrection && !_overlayVisible)
					dst_y = real2Aspect(dst_y);

				assert(scalerProc != NULL);

				if (_videoMode.mode == GFX_HALF && scalerProc == DownscaleAllByHalf) {

					if (dst_x%2==1) {
						dst_x--;
						dst_w++;
					}
					if (dst_y%2==1) {
						dst_y--;
						dst_h++;
					}

					if (dst_w&1)
						dst_w++;
					if (dst_h&1)
						dst_h++;

					src_x = dst_x;
					src_y = dst_y;
					dst_x = dst_x / 2;
					dst_y = dst_y / 2;
				}
				scalerProc((byte *)srcSurf->pixels + (src_x * 2 + 2) + (src_y + 1) * srcPitch, srcPitch,
						   (byte *)_hwscreen->pixels + dst_x * 2 + dst_y * dstPitch, dstPitch, dst_w, dst_h);
			}

			if (_videoMode.mode == GFX_HALF && scalerProc == DownscaleAllByHalf) {
				r->w = r->w / 2;
				r->h = dst_h / 2;
			} else {
				r->w = r->w;
				r->h = dst_h;
			}

			r->x = dst_x;
			r->y = dst_y;

#ifdef USE_SCALERS
			if (_videoMode.aspectRatioCorrection && orig_dst_y < height && !_overlayVisible)
				r->h = stretch200To240((uint8 *) _hwscreen->pixels, dstPitch, r->w, r->h, r->x, r->y, orig_dst_y * scale1);
#endif
		}
		SDL_UnlockSurface(srcSurf);
		SDL_UnlockSurface(_hwscreen);

		// Readjust the dirty rect list in case we are doing a full update.
		// This is necessary if shaking is active.
		if (_forceFull) {
			_dirtyRectList[0].y = 0;
			_dirtyRectList[0].h = (_videoMode.mode == GFX_HALF) ? effectiveScreenHeight()/2 : effectiveScreenHeight();
		}

		drawMouse();

#ifdef USE_OSD
		if (_osdAlpha != SDL_ALPHA_TRANSPARENT) {
			SDL_BlitSurface(_osdSurface, 0, _hwscreen, 0);
		}
#endif
		// Finally, blit all our changes to the screen
		SDL_UpdateRects(_hwscreen, _numDirtyRects, _dirtyRectList);
	}

	_numDirtyRects = 0;
	_forceFull = false;
	_mouseNeedsRedraw = false;
}

void LinuxmotoSdlGraphicsManager::showOverlay() {
	if (_videoMode.mode == GFX_HALF) {
		_mouseCurState.x = _mouseCurState.x / 2;
		_mouseCurState.y = _mouseCurState.y / 2;
	}
	SurfaceSdlGraphicsManager::showOverlay();
}

void LinuxmotoSdlGraphicsManager::hideOverlay() {
	if (_videoMode.mode == GFX_HALF) {
		_mouseCurState.x = _mouseCurState.x * 2;
		_mouseCurState.y = _mouseCurState.y * 2;
	}
	SurfaceSdlGraphicsManager::hideOverlay();
}

void LinuxmotoSdlGraphicsManager::warpMouse(int x, int y) {
	if (_mouseCurState.x != x || _mouseCurState.y != y) {
		if (_videoMode.mode == GFX_HALF && !_overlayVisible) {
			x = x / 2;
			y = y / 2;
		}
	}
	SurfaceSdlGraphicsManager::warpMouse(x, y);
}

void LinuxmotoSdlGraphicsManager::transformMouseCoordinates(Common::Point &point) {
	if (!_overlayVisible) {
		if (_videoMode.mode == GFX_HALF) {
			point.x *= 2;
			point.y *= 2;
		}
		point.x /= _videoMode.scaleFactor;
		point.y /= _videoMode.scaleFactor;
		if (_videoMode.aspectRatioCorrection)
			point.y = aspect2Real(point.y);
	}
}

#endif