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/engines/neverhood/screen.cpp

http://github.com/scummvm/scummvm
C++ | 422 lines | 321 code | 79 blank | 22 comment | 75 complexity | 86b3f86676c4f96fa199181b1ed684d8 MD5 | raw file
  1/* ScummVM - Graphic Adventure Engine
  2 *
  3 * ScummVM is the legal property of its developers, whose names
  4 * are too numerous to list here. Please refer to the COPYRIGHT
  5 * file distributed with this source distribution.
  6 *
  7 * This program is free software; you can redistribute it and/or
  8 * modify it under the terms of the GNU General Public License
  9 * as published by the Free Software Foundation; either version 2
 10 * of the License, or (at your option) any later version.
 11 *
 12 * This program is distributed in the hope that it will be useful,
 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15 * GNU General Public License for more details.
 16 *
 17 * You should have received a copy of the GNU General Public License
 18 * along with this program; if not, write to the Free Software
 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 20 *
 21 */
 22
 23#include "graphics/palette.h"
 24#include "video/smk_decoder.h"
 25#include "neverhood/screen.h"
 26
 27namespace Neverhood {
 28
 29Screen::Screen(NeverhoodEngine *vm)
 30	: _vm(vm), _paletteData(NULL), _paletteChanged(false), _smackerDecoder(NULL),
 31	_yOffset(0), _fullRefresh(false), _frameDelay(0), _savedSmackerDecoder(NULL),
 32	_savedFrameDelay(0), _savedYOffset(0) {
 33
 34	_ticks = _vm->_system->getMillis();
 35
 36	_backScreen = new Graphics::Surface();
 37	_backScreen->create(640, 480, Graphics::PixelFormat::createFormatCLUT8());
 38
 39	_renderQueue = new RenderQueue();
 40	_prevRenderQueue = new RenderQueue();
 41	_microTiles = new MicroTileArray(640, 480);
 42
 43}
 44
 45Screen::~Screen() {
 46	delete _microTiles;
 47	delete _renderQueue;
 48	delete _prevRenderQueue;
 49	_backScreen->free();
 50	delete _backScreen;
 51}
 52
 53void Screen::update() {
 54	_ticks = _vm->_system->getMillis();
 55	updatePalette();
 56
 57	if (_fullRefresh) {
 58		// NOTE When playing a fullscreen/doubled Smacker video usually a full screen refresh is needed
 59		_vm->_system->copyRectToScreen((const byte*)_backScreen->getPixels(), _backScreen->pitch, 0, 0, 640, 480);
 60		_fullRefresh = false;
 61		return;
 62	}
 63
 64	_microTiles->clear();
 65
 66	for (RenderQueue::iterator it = _renderQueue->begin(); it != _renderQueue->end(); ++it) {
 67		RenderItem &renderItem = (*it);
 68		renderItem._refresh = true;
 69		for (RenderQueue::iterator jt = _prevRenderQueue->begin(); jt != _prevRenderQueue->end(); ++jt) {
 70			RenderItem &prevRenderItem = (*jt);
 71			if (prevRenderItem == renderItem) {
 72				prevRenderItem._refresh = false;
 73				renderItem._refresh = false;
 74			}
 75		}
 76	}
 77
 78	for (RenderQueue::iterator jt = _prevRenderQueue->begin(); jt != _prevRenderQueue->end(); ++jt) {
 79		RenderItem &prevRenderItem = (*jt);
 80		if (prevRenderItem._refresh)
 81			_microTiles->addRect(Common::Rect(prevRenderItem._destX, prevRenderItem._destY, prevRenderItem._destX + prevRenderItem._width, prevRenderItem._destY + prevRenderItem._height));
 82	}
 83
 84	for (RenderQueue::iterator it = _renderQueue->begin(); it != _renderQueue->end(); ++it) {
 85		RenderItem &renderItem = (*it);
 86		if (renderItem._refresh)
 87			_microTiles->addRect(Common::Rect(renderItem._destX, renderItem._destY, renderItem._destX + renderItem._width, renderItem._destY + renderItem._height));
 88		renderItem._refresh = true;
 89	}
 90
 91	RectangleList *updateRects = _microTiles->getRectangles();
 92
 93	for (RenderQueue::iterator it = _renderQueue->begin(); it != _renderQueue->end(); ++it) {
 94		RenderItem &renderItem = (*it);
 95		for (RectangleList::iterator ri = updateRects->begin(); ri != updateRects->end(); ++ri)
 96			blitRenderItem(renderItem, *ri);
 97	}
 98
 99	SWAP(_renderQueue, _prevRenderQueue);
100	_renderQueue->clear();
101
102	for (RectangleList::iterator ri = updateRects->begin(); ri != updateRects->end(); ++ri) {
103		Common::Rect &r = *ri;
104		_vm->_system->copyRectToScreen((const byte*)_backScreen->getBasePtr(r.left, r.top), _backScreen->pitch, r.left, r.top, r.width(), r.height());
105	}
106
107	delete updateRects;
108
109}
110
111uint32 Screen::getNextFrameTime() {
112	int32 frameDelay = _frameDelay;
113	if (_smackerDecoder && _smackerDecoder->isVideoLoaded() && !_smackerDecoder->endOfVideo())
114		frameDelay = _smackerDecoder->getTimeToNextFrame();
115	int32 waitTicks = frameDelay - (_vm->_system->getMillis() - _ticks);
116	return _vm->_system->getMillis() + waitTicks;
117}
118
119void Screen::saveParams() {
120	_savedSmackerDecoder = _smackerDecoder;
121	_savedFrameDelay = _frameDelay;
122	_savedYOffset = _yOffset;
123}
124
125void Screen::restoreParams() {
126	_smackerDecoder = _savedSmackerDecoder;
127	_frameDelay = _savedFrameDelay;
128	_yOffset = _savedYOffset;
129}
130
131void Screen::setFps(int fps) {
132	_frameDelay = 1000 / fps;
133}
134
135int Screen::getFps() {
136	return 1000 / _frameDelay;
137}
138
139void Screen::setYOffset(int16 yOffset) {
140	_yOffset = yOffset;
141}
142
143int16 Screen::getYOffset() {
144	return _yOffset;
145}
146
147void Screen::setPaletteData(byte *paletteData) {
148	_paletteChanged = true;
149	_paletteData = paletteData;
150}
151
152void Screen::unsetPaletteData(byte *paletteData) {
153	if (_paletteData == paletteData) {
154		_paletteChanged = false;
155		_paletteData = NULL;
156	}
157}
158
159void Screen::testPalette(byte *paletteData) {
160	if (_paletteData == paletteData)
161		_paletteChanged = true;
162}
163
164void Screen::updatePalette() {
165	if (_paletteChanged && _paletteData) {
166		byte *tempPalette = new byte[768];
167		for (int i = 0; i < 256; i++) {
168			tempPalette[i * 3 + 0] = _paletteData[i * 4 + 0];
169			tempPalette[i * 3 + 1] = _paletteData[i * 4 + 1];
170			tempPalette[i * 3 + 2] = _paletteData[i * 4 + 2];
171		}
172		_vm->_system->getPaletteManager()->setPalette(tempPalette, 0, 256);
173		delete[] tempPalette;
174		_paletteChanged = false;
175	}
176}
177
178void Screen::clear() {
179	memset(_backScreen->getPixels(), 0, _backScreen->pitch * _backScreen->h);
180	_fullRefresh = true;
181	clearRenderQueue();
182}
183
184void Screen::clearRenderQueue() {
185	_renderQueue->clear();
186	_prevRenderQueue->clear();
187}
188
189void Screen::drawSurface2(const Graphics::Surface *surface, NDrawRect &drawRect, NRect &clipRect, bool transparent, byte version,
190	const Graphics::Surface *shadowSurface) {
191
192	int16 destX, destY;
193	NRect ddRect;
194
195	if (drawRect.x + drawRect.width >= clipRect.x2)
196		ddRect.x2 = clipRect.x2 - drawRect.x;
197	else
198		ddRect.x2 = drawRect.width;
199
200	if (drawRect.x < clipRect.x1) {
201		destX = clipRect.x1;
202		ddRect.x1 = clipRect.x1 - drawRect.x;
203	} else {
204		destX = drawRect.x;
205		ddRect.x1 = 0;
206	}
207
208	if (drawRect.y + drawRect.height >= clipRect.y2)
209		ddRect.y2 = clipRect.y2 - drawRect.y;
210	else
211		ddRect.y2 = drawRect.height;
212
213	if (drawRect.y < clipRect.y1) {
214		destY = clipRect.y1;
215		ddRect.y1 = clipRect.y1 - drawRect.y;
216	} else {
217		destY = drawRect.y;
218		ddRect.y1 = 0;
219	}
220
221	queueBlit(surface, destX, destY, ddRect, transparent, version, shadowSurface);
222
223}
224
225void Screen::drawSurface3(const Graphics::Surface *surface, int16 x, int16 y, NDrawRect &drawRect, NRect &clipRect, bool transparent, byte version) {
226
227	int16 destX, destY;
228	NRect ddRect;
229
230	if (x + drawRect.width >= clipRect.x2)
231		ddRect.x2 = clipRect.x2 - drawRect.x - x;
232	else
233		ddRect.x2 = drawRect.x + drawRect.width;
234
235	if (x < clipRect.x1) {
236		destX = clipRect.x1;
237		ddRect.x1 = clipRect.x1 + drawRect.x - x;
238	} else {
239		destX = x;
240		ddRect.x1 = drawRect.x;
241	}
242
243	if (y + drawRect.height >= clipRect.y2)
244		ddRect.y2 = clipRect.y2 + drawRect.y - y;
245	else
246		ddRect.y2 = drawRect.y + drawRect.height;
247
248	if (y < clipRect.y1) {
249		destY = clipRect.y1;
250		ddRect.y1 = clipRect.y1 + drawRect.y - y;
251	} else {
252		destY = y;
253		ddRect.y1 = drawRect.y;
254	}
255
256	queueBlit(surface, destX, destY, ddRect, transparent, version);
257
258}
259
260void Screen::drawDoubleSurface2(const Graphics::Surface *surface, NDrawRect &drawRect) {
261
262	const byte *source = (const byte*)surface->getPixels();
263	byte *dest = (byte*)_backScreen->getBasePtr(drawRect.x, drawRect.y);
264
265	for (int16 yc = 0; yc < surface->h; yc++) {
266		byte *row = dest;
267		for (int16 xc = 0; xc < surface->w; xc++) {
268			*row++ = *source;
269			*row++ = *source++;
270		}
271		memcpy(dest + _backScreen->pitch, dest, surface->w * 2);
272		dest += _backScreen->pitch;
273		dest += _backScreen->pitch;
274	}
275
276	_fullRefresh = true; // See Screen::update
277
278}
279
280void Screen::drawUnk(const Graphics::Surface *surface, NDrawRect &drawRect, NDrawRect &sysRect, NRect &clipRect, bool transparent, byte version) {
281
282	int16 x, y;
283	bool xflag, yflag;
284	NDrawRect newDrawRect;
285
286	x = sysRect.x;
287	if (sysRect.width <= x || -sysRect.width >= x)
288		x = x % sysRect.width;
289	if (x < 0)
290		x += sysRect.width;
291
292	y = sysRect.y;
293	if (y >= sysRect.height || -sysRect.height >= y)
294		y = y % sysRect.height;
295	if (y < 0)
296		y += sysRect.height;
297
298	xflag = x <= 0;
299	yflag = y <= 0;
300
301	newDrawRect.x = x;
302	newDrawRect.width = sysRect.width - x;
303	if (drawRect.width < newDrawRect.width) {
304		xflag = true;
305		newDrawRect.width = drawRect.width;
306	}
307
308	newDrawRect.y = y;
309	newDrawRect.height = sysRect.height - y;
310	if (drawRect.height < newDrawRect.height) {
311		yflag = true;
312		newDrawRect.height = drawRect.height;
313	}
314
315	drawSurface3(surface, drawRect.x, drawRect.y, newDrawRect, clipRect, transparent, version);
316
317	if (!xflag) {
318		newDrawRect.x = 0;
319		newDrawRect.y = y;
320		newDrawRect.width = x + drawRect.width - sysRect.width;
321		newDrawRect.height = sysRect.height - y;
322		if (drawRect.height < newDrawRect.height)
323			newDrawRect.height = drawRect.height;
324		drawSurface3(surface, sysRect.width + drawRect.x - x, drawRect.y, newDrawRect, clipRect, transparent, version);
325	}
326
327	if (!yflag) {
328		newDrawRect.x = x;
329		newDrawRect.y = 0;
330		newDrawRect.width = sysRect.width - x;
331		newDrawRect.height = y + drawRect.height - sysRect.height;
332		if (drawRect.width < newDrawRect.width)
333			newDrawRect.width = drawRect.width;
334		drawSurface3(surface, drawRect.x, sysRect.height + drawRect.y - y, newDrawRect, clipRect, transparent, version);
335	}
336
337	if (!xflag && !yflag) {
338		newDrawRect.x = 0;
339		newDrawRect.y = 0;
340		newDrawRect.width = x + drawRect.width - sysRect.width;
341		newDrawRect.height = y + drawRect.height - sysRect.height;
342		drawSurface3(surface, sysRect.width + drawRect.x - x, sysRect.height + drawRect.y - y, newDrawRect, clipRect, transparent, version);
343	}
344
345}
346
347void Screen::drawSurfaceClipRects(const Graphics::Surface *surface, NDrawRect &drawRect, NRect *clipRects, uint clipRectsCount, bool transparent, byte version) {
348	NDrawRect clipDrawRect(0, 0, drawRect.width, drawRect.height);
349	for (uint i = 0; i < clipRectsCount; i++)
350		drawSurface3(surface, drawRect.x, drawRect.y, clipDrawRect, clipRects[i], transparent, version);
351}
352
353void Screen::queueBlit(const Graphics::Surface *surface, int16 destX, int16 destY, NRect &ddRect, bool transparent, byte version,
354	const Graphics::Surface *shadowSurface) {
355
356	const int width = ddRect.x2 - ddRect.x1;
357	const int height = ddRect.y2 - ddRect.y1;
358
359	if (width <= 0 || height <= 0)
360		return;
361
362	RenderItem renderItem;
363	renderItem._surface = surface;
364	renderItem._shadowSurface = shadowSurface;
365	renderItem._destX = destX;
366	renderItem._destY = destY;
367	renderItem._srcX = ddRect.x1;
368	renderItem._srcY = ddRect.y1;
369	renderItem._width = width;
370	renderItem._height = height;
371	renderItem._transparent = transparent;
372	renderItem._version = version;
373	_renderQueue->push_back(renderItem);
374
375}
376
377void Screen::blitRenderItem(const RenderItem &renderItem, const Common::Rect &clipRect) {
378
379	const Graphics::Surface *surface = renderItem._surface;
380	const Graphics::Surface *shadowSurface = renderItem._shadowSurface;
381	const int16 x0 = MAX<int16>(clipRect.left, renderItem._destX);
382	const int16 y0 = MAX<int16>(clipRect.top, renderItem._destY);
383	const int16 x1 = MIN<int16>(clipRect.right, renderItem._destX + renderItem._width);
384	const int16 y1 = MIN<int16>(clipRect.bottom, renderItem._destY + renderItem._height);
385	const int16 width = x1 - x0;
386	int16 height = y1 - y0;
387
388	if (width < 0 || height < 0)
389		return;
390
391	const byte *source = (const byte*)surface->getBasePtr(renderItem._srcX + x0 - renderItem._destX, renderItem._srcY + y0 - renderItem._destY);
392	byte *dest = (byte*)_backScreen->getBasePtr(x0, y0);
393
394	if (shadowSurface) {
395		const byte *shadowSource = (const byte*)shadowSurface->getBasePtr(x0, y0);
396		while (height--) {
397			for (int xc = 0; xc < width; xc++)
398				if (source[xc] != 0)
399					dest[xc] = shadowSource[xc];
400			source += surface->pitch;
401			shadowSource += shadowSurface->pitch;
402			dest += _backScreen->pitch;
403		}
404	} else if (!renderItem._transparent) {
405		while (height--) {
406			memcpy(dest, source, width);
407			source += surface->pitch;
408			dest += _backScreen->pitch;
409		}
410	} else {
411		while (height--) {
412			for (int xc = 0; xc < width; xc++)
413				if (source[xc] != 0)
414					dest[xc] = source[xc];
415			source += surface->pitch;
416			dest += _backScreen->pitch;
417		}
418	}
419
420}
421
422} // End of namespace Neverhood