aboutsummaryrefslogtreecommitdiff
path: root/engines/sci/gui/gui_view.cpp
blob: bff2e38e3b2232a610fcb8959fe1ddf6400281bb (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
/* 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.
 *
 * $URL$
 * $Id$
 *
 */

#include "sci/sci.h"
#include "sci/engine/state.h"
#include "sci/tools.h"
#include "sci/gui/gui_gfx.h"
#include "sci/gui/gui_screen.h"
#include "sci/gui/gui_palette.h"
#include "sci/gui/gui_view.h"

namespace Sci {

SciGuiView::SciGuiView(ResourceManager *resMan, SciGuiScreen *screen, SciGuiPalette *palette, GuiResourceId resourceId)
	: _resMan(resMan), _screen(screen), _palette(palette), _resourceId(resourceId) {
	assert(resourceId != -1);
	initData(resourceId);
}

SciGuiView::~SciGuiView() {
	// Iterate through the loops
	for (uint16 loopNum = 0; loopNum < _loopCount; loopNum++) {
		// and through the cells of each loop
		for (uint16 celNum = 0; celNum < _loop[loopNum].celCount; celNum++) {
			delete[] _loop[loopNum].cel[celNum].rawBitmap;
		}
		delete[] _loop[loopNum].cel;
	}
	delete[] _loop;

	_resMan->unlockResource(_resource);
}

void SciGuiView::initData(GuiResourceId resourceId) {
	_resource = _resMan->findResource(ResourceId(kResourceTypeView, resourceId), true);
	if (!_resource) {
		error("view resource %d not found", resourceId);
	}
	_resourceData = _resource->data;

	byte *celData, *loopData;
	uint16 celOffset;
	sciViewCelInfo *cel;
	uint16 celCount = 0;
	uint16 mirrorBits = 0;
	uint16 palOffset = 0;
	uint16 headerSize = 0;
	uint16 loopSize = 0, celSize = 0;
	int loopNo, celNo;
	byte seekEntry;
	bool IsEGA = false;

	_embeddedPal = false;
	_loopCount = 0;

	switch (_resMan->getViewType()) {
	case kViewEga: // View-format SCI0 (and Amiga 16 colors)
		IsEGA = true;
	case kViewAmiga: // View-format Amiga (32 colors)
	case kViewVga: // View-format SCI1
		// LoopCount:WORD MirrorMask:WORD Version:WORD PaletteOffset:WORD LoopOffset0:WORD LoopOffset1:WORD...
		
		// bit 0x8000 of _resourceData[1] means palette is set
		_loopCount = _resourceData[0];
		mirrorBits = READ_LE_UINT16(_resourceData + 2);
		palOffset = READ_LE_UINT16(_resourceData + 6);

		if (palOffset && palOffset != 0x100) {
			// Some games also have an offset set. It seems that it points to a 16-byte mapping table
			//  cels also work by not using it, so we dont.
			if (!IsEGA) {
				_palette->createFromData(&_resourceData[palOffset], &_viewPalette);
				_embeddedPal = true;
			}
		}

		_loop = new sciViewLoopInfo[_loopCount];
		for (loopNo = 0; loopNo < _loopCount; loopNo++) {
			loopData = _resourceData + READ_LE_UINT16(_resourceData + 8 + loopNo * 2);
			// CelCount:WORD Unknown:WORD CelOffset0:WORD CelOffset1:WORD...

			celCount = READ_LE_UINT16(loopData);
			_loop[loopNo].celCount = celCount;
			_loop[loopNo].mirrorFlag = mirrorBits & 1 ? true : false;
			mirrorBits >>= 1;

			// read cel info
			_loop[loopNo].cel = new sciViewCelInfo[celCount];
			for (celNo = 0; celNo < celCount; celNo++) {
				celOffset = READ_LE_UINT16(loopData + 4 + celNo * 2);
				celData = _resourceData + celOffset;

				// For VGA
				// Width:WORD Height:WORD DisplaceX:BYTE DisplaceY:BYTE ClearKey:BYTE Unknown:BYTE RLEData starts now directly
				// For EGA
				// Width:WORD Height:WORD DisplaceX:BYTE DisplaceY:BYTE ClearKey:BYTE EGAData starts now directly
				cel = &_loop[loopNo].cel[celNo];
				cel->width = READ_LE_UINT16(celData);
				cel->height = READ_LE_UINT16(celData + 2);
				cel->displaceX = celData[4];
				cel->displaceY = celData[5];
				cel->clearKey = celData[6];
				if (IsEGA) {
					cel->offsetEGA = celOffset + 7;
					cel->offsetRLE = 0;
				} else {
					cel->offsetEGA = 0;
					cel->offsetRLE = celOffset + 8;
				}
				cel->offsetLiteral = 0;
				cel->rawBitmap = 0;
				if (_loop[loopNo].mirrorFlag)
					cel->displaceX = -cel->displaceX;
			}
		}
		break;

	case kViewVga11: // View-format SCI1.1
		// LoopCount:WORD MirrorMask:WORD Version:WORD PaletteOffset:WORD LoopOffset0:WORD LoopOffset1:WORD...
		// HeaderSize:WORD LoopCount:BYTE Unknown:BYTE Version:WORD Unknown:WORD PaletteOffset:WORD
		headerSize = READ_LE_UINT16(_resourceData + 0);
		_loopCount = _resourceData[2];
		palOffset = READ_LE_UINT16(_resourceData + 8);
		// FIXME: After LoopCount there is another byte and its set for view 50 within Laura Bow 2 CD, check what it means

		loopData = _resourceData + headerSize;
		loopSize = _resourceData[12];
		celSize = _resourceData[13];

		if (palOffset) {
			_palette->createFromData(&_resourceData[palOffset], &_viewPalette);
			_embeddedPal = true;
		}

		_loop = new sciViewLoopInfo[_loopCount];
		for (loopNo = 0; loopNo < _loopCount; loopNo++) {
			loopData = _resourceData + headerSize + (loopNo * loopSize);

			seekEntry = loopData[2];
			if (seekEntry != 255) {
				if (seekEntry >= _loopCount)
					error("Bad loop-pointer in sci 1.1 view");
				_loop[loopNo].mirrorFlag = true;
				loopData = _resourceData + headerSize + (seekEntry * loopSize);
			} else {
				_loop[loopNo].mirrorFlag = false;
			}

			celCount = loopData[4];
			_loop[loopNo].celCount = celCount;

			celData = _resourceData + READ_LE_UINT16(loopData + 14);

			// read cel info
			_loop[loopNo].cel = new sciViewCelInfo[celCount];
			for (celNo = 0; celNo < celCount; celNo++) {
				cel = &_loop[loopNo].cel[celNo];
				cel->width = READ_LE_UINT16(celData);
				cel->height = READ_LE_UINT16(celData + 2);
				cel->displaceX = READ_LE_UINT16(celData + 4);
				cel->displaceY = READ_LE_UINT16(celData + 6);
				cel->clearKey = celData[8];
				cel->offsetEGA = 0;
				cel->offsetRLE = READ_LE_UINT16(celData + 24);
				cel->offsetLiteral = READ_LE_UINT16(celData + 28);
				cel->rawBitmap = 0;
				if (_loop[loopNo].mirrorFlag)
					cel->displaceX = -cel->displaceX;

				celData += celSize;
			}
		}
		break;

	default:
		error("ViewType was not detected, can't continue");
	}
}

GuiResourceId SciGuiView::getResourceId() {
	return _resourceId;
}

int16 SciGuiView::getWidth(GuiViewLoopNo loopNo, GuiViewCelNo celNo) {
	loopNo = CLIP<int16>(loopNo, 0, _loopCount -1);
	if (celNo >= _loop[loopNo].celCount)
		celNo = 0;
	return _loopCount ? _loop[loopNo].cel[celNo].width : 0;
}

int16 SciGuiView::getHeight(GuiViewLoopNo loopNo, GuiViewCelNo celNo) {
	loopNo = CLIP<int16>(loopNo, 0, _loopCount -1);
	if (celNo >= _loop[loopNo].celCount)
		celNo = 0;
	return _loopCount ? _loop[loopNo].cel[celNo].height : 0;
}

sciViewCelInfo *SciGuiView::getCelInfo(GuiViewLoopNo loopNo, GuiViewCelNo celNo) {
	loopNo = CLIP<int16>(loopNo, 0, _loopCount - 1);
	if (celNo >= _loop[loopNo].celCount)
		celNo = 0;
	return _loopCount ? &_loop[loopNo].cel[celNo] : NULL;
}

sciViewLoopInfo *SciGuiView::getLoopInfo(GuiViewLoopNo loopNo) {
	loopNo = CLIP<int16>(loopNo, 0, _loopCount - 1);
	return _loopCount ? &_loop[loopNo] : NULL;
}

void SciGuiView::getCelRect(GuiViewLoopNo loopNo, GuiViewCelNo celNo, int16 x, int16 y, int16 z, Common::Rect *outRect) {
	sciViewCelInfo *celInfo = getCelInfo(loopNo, celNo);
	if (celInfo) {
		outRect->left = x + celInfo->displaceX - (celInfo->width >> 1);
		outRect->right = outRect->left + celInfo->width;
		outRect->bottom = y + celInfo->displaceY - z + 1;
		outRect->top = outRect->bottom - celInfo->height;
	}
}

void SciGuiView::unpackCel(GuiViewLoopNo loopNo, GuiViewCelNo celNo, byte *outPtr, uint16 pixelCount) {
	sciViewCelInfo *celInfo = getCelInfo(loopNo, celNo);
	byte *rlePtr;
	byte *literalPtr;
	uint16 pixelNo = 0, runLength;
	byte byte;

	if (celInfo->offsetEGA) {
		// decompression for EGA views
		literalPtr = _resourceData + _loop[loopNo].cel[celNo].offsetEGA;
		while (pixelNo < pixelCount) {
			byte = *literalPtr++;
			runLength = byte >> 4;
			memset(outPtr + pixelNo, byte & 0x0F, MIN<uint16>(runLength, pixelCount - pixelNo));
			pixelNo += runLength;
		}
		return;
	}

	rlePtr = _resourceData + celInfo->offsetRLE;
	if (!celInfo->offsetLiteral) { // no additional literal data
		if (_resMan->getViewType() == kViewAmiga) {
			// decompression for amiga views
			while (pixelNo < pixelCount) {
				byte = *rlePtr++;
				if (byte & 0x07) { // fill with color
					runLength = byte & 0x07;
					byte = byte >> 3;
					while (runLength-- && pixelNo < pixelCount) {
						outPtr[pixelNo++] = byte;
					}
				} else { // fill with transparent
					runLength = byte >> 3;
					pixelNo += runLength;
				}
			}
			return;
		} else {
			// decompression for data that has just one combined stream
			while (pixelNo < pixelCount) {
				byte = *rlePtr++;
				runLength = byte & 0x3F;
				switch (byte & 0xC0) {
				case 0: // copy bytes as-is
					while (runLength-- && pixelNo < pixelCount)
						outPtr[pixelNo++] = *rlePtr++;
					break;
				case 0x80: // fill with color
					memset(outPtr + pixelNo, *rlePtr++, MIN<uint16>(runLength, pixelCount - pixelNo));
					pixelNo += runLength;
					break;
				case 0xC0: // fill with transparent
					pixelNo += runLength;
					break;
				}
			}
			return;
		}
	} else {
		// decompression for data that has separate rle and literal streams
		literalPtr = _resourceData + celInfo->offsetLiteral;
		while (pixelNo < pixelCount) {
			byte = *rlePtr++;
			runLength = byte & 0x3F;
			switch (byte & 0xC0) {
			case 0: // copy bytes as-is
				while (runLength-- && pixelNo < pixelCount)
					outPtr[pixelNo++] = *literalPtr++;
				break;
			case 0x80: // fill with color
				memset(outPtr + pixelNo, *literalPtr++, MIN<uint16>(runLength, pixelCount - pixelNo));
				pixelNo += runLength;
				break;
			case 0xC0: // fill with transparent
				pixelNo += runLength;
				break;
			}
		}
		return;
	}
	error("Unable to decompress view");
}

byte *SciGuiView::getBitmap(GuiViewLoopNo loopNo, GuiViewCelNo celNo) {
	loopNo = CLIP<int16>(loopNo, 0, _loopCount -1);
	if (celNo >= _loop[loopNo].celCount)
		celNo = 0;
	if (_loop[loopNo].cel[celNo].rawBitmap)
		return _loop[loopNo].cel[celNo].rawBitmap;

	uint16 width = _loop[loopNo].cel[celNo].width;
	uint16 height = _loop[loopNo].cel[celNo].height;
	// allocating memory to store cel's bitmap
	assert(width * height <= 64000);
	uint16 pixelCount = width * height;
	_loop[loopNo].cel[celNo].rawBitmap = new byte[pixelCount];
	byte *pBitmap = _loop[loopNo].cel[celNo].rawBitmap;

	// Some RLE compressed cels end with the last non-transparent pixel, thats why we fill it up here
	//  FIXME: change this to fill the remaining bytes within unpackCel()
	memset(pBitmap, _loop[loopNo].cel[celNo].clearKey, pixelCount);
	unpackCel(loopNo, celNo, pBitmap, pixelCount);

	if (!_resMan->isVGA()) {
		unditherBitmap(pBitmap, width, height, _loop[loopNo].cel[celNo].clearKey);
	}

	// mirroring the cel if needed
	if (_loop[loopNo].mirrorFlag) {
		for (int i = 0; i < height; i++, pBitmap += width)
			for (int j = 0; j < width / 2; j++)
				SWAP(pBitmap[j], pBitmap[width - j - 1]);
	}
	return _loop[loopNo].cel[celNo].rawBitmap;
}

// Called after unpacking an EGA cel, this will try to undither (parts) of the cel if the dithering in here
//  matches dithering used by the current picture
void SciGuiView::unditherBitmap(byte *bitmapPtr, int16 width, int16 height, byte clearKey) {
	int16 *unditherMemorial = _screen->unditherGetMemorial();

	// It makes no sense to go further, if no memorial data from current picture is available
	if (!unditherMemorial)
		return;

	// Makes no sense to process bitmaps that are 3 pixels wide or less
	if (width <= 3) return;

	// Walk through the bitmap and remember all combinations of colors
	int16 bitmapMemorial[SCI_SCREEN_UNDITHERMEMORIAL_SIZE];
	byte *curPtr;
	byte color1, color2;
	int16 y, x;

	memset(&bitmapMemorial, 0, sizeof(bitmapMemorial));

	// Count all seemingly dithered pixel-combinations as soon as at least 4 pixels are adjacent
	curPtr = bitmapPtr;
	for (y = 0; y < height; y++) {
		color1 = (curPtr[0] << 8) | (curPtr[1] << 4); color2 = curPtr[2];
		curPtr += 3;
		for (x = 3; x < width; x++) {
			color1 = (color1 << 4) | (color2 >> 4);
			color2 = (color2 << 4) | *curPtr++;
			if (color1 == color2)
				bitmapMemorial[color1]++;
		}
	}

	// Now compare both memorial tables to find out matching dithering-combinations
	bool unditherTable[SCI_SCREEN_UNDITHERMEMORIAL_SIZE];
	byte color, unditherCount = 0;
	memset(&unditherTable, false, sizeof(unditherTable));
	for (color = 0; color < 255; color++) {
		if ((bitmapMemorial[color] > 5) && (unditherMemorial[color] > 200)) {
			// match found, check if colorKey is contained -> if so, we ignore of course
			color1 = color & 0x0F; color2 = color >> 4;
			if ((color1 != clearKey) && (color2 != clearKey) && (color1 != color2)) {
				// so set this and the reversed color-combination for undithering
				unditherTable[color] = true; unditherTable[(color1 << 4) | color2] = true;
				unditherCount++;
			}
		}
	}

	// Nothing found to undither -> exit straight away
	if (!unditherCount)
		return;

	// We now need to replace color-combinations
	curPtr = bitmapPtr;
	for (y = 0; y < height; y++) {
		color = *curPtr;
		for (x = 1; x < width; x++) {
			color = (color << 4) | curPtr[1];
			if (unditherTable[color]) {
				// some color with black? turn colors around otherwise it wont be the right color at all
				if ((color & 0xF0)==0)
					color = (color << 4) | (color >> 4);
				curPtr[0] = color; curPtr[1] = color;
			}
			curPtr++;
		}
		curPtr++;
	}
}

void SciGuiView::draw(Common::Rect rect, Common::Rect clipRect, Common::Rect clipRectTranslated, GuiViewLoopNo loopNo, GuiViewCelNo celNo, byte priority, uint16 paletteNo) {
	GuiPalette *palette = _embeddedPal ? &_viewPalette : &_palette->_sysPalette;
	sciViewCelInfo *celInfo = getCelInfo(loopNo, celNo);
	byte *bitmap = getBitmap(loopNo, celNo);
	int16 celHeight = celInfo->height, celWidth = celInfo->width;
	int16 width, height;
	byte clearKey = celInfo->clearKey;
	byte color;
	byte drawMask = priority == 255 ? SCI_SCREEN_MASK_VISUAL : SCI_SCREEN_MASK_VISUAL|SCI_SCREEN_MASK_PRIORITY;
	int x, y;

	if (_embeddedPal) {
		// Merge view palette in...
		_palette->set(&_viewPalette, 1);
	}

	width = MIN(clipRect.width(), celWidth);
	height = MIN(clipRect.height(), celHeight);

	bitmap += (clipRect.top - rect.top) * celWidth + (clipRect.left - rect.left);

	for (y = clipRectTranslated.top; y < clipRectTranslated.top + height; y++, bitmap += celWidth) {
		for (x = 0; x < width; x++) {
			color = bitmap[x];
			if (color != clearKey && priority >= _screen->getPriority(clipRectTranslated.left + x, y))
				_screen->putPixel(clipRectTranslated.left + x, y, drawMask, palette->mapping[color], priority, 0);
		}
	}
}

GuiPalette *SciGuiView::getPalette() {
	return _embeddedPal ? &_viewPalette : &_palette->_sysPalette;
}

} // End of namespace Sci