aboutsummaryrefslogtreecommitdiff
path: root/engines/sci/graphics/celobj32.cpp
blob: 8540b636fcad117a1813fadaf9838c413df7cb9e (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
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
/* 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 "sci/resource.h"
#include "sci/engine/features.h"
#include "sci/engine/seg_manager.h"
#include "sci/engine/state.h"
#include "sci/graphics/celobj32.h"
#include "sci/graphics/frameout.h"
#include "sci/graphics/palette32.h"
#include "sci/graphics/remap32.h"
#include "sci/graphics/text32.h"
#include "sci/engine/workarounds.h"

namespace Sci {
#pragma mark CelScaler

CelScaler *CelObj::_scaler = nullptr;

void CelScaler::activateScaleTables(const Ratio &scaleX, const Ratio &scaleY) {
	for (int i = 0; i < ARRAYSIZE(_scaleTables); ++i) {
		if (_scaleTables[i].scaleX == scaleX && _scaleTables[i].scaleY == scaleY) {
			_activeIndex = i;
			return;
		}
	}

	const int i = 1 - _activeIndex;
	_activeIndex = i;
	CelScalerTable &table = _scaleTables[i];

	if (table.scaleX != scaleX) {
		buildLookupTable(table.valuesX, scaleX, kCelScalerTableSize);
		table.scaleX = scaleX;
	}

	if (table.scaleY != scaleY) {
		buildLookupTable(table.valuesY, scaleY, kCelScalerTableSize);
		table.scaleY = scaleY;
	}
}

void CelScaler::buildLookupTable(int *table, const Ratio &ratio, const int size) {
	int value = 0;
	int remainder = 0;
	const int num = ratio.getNumerator();
	for (int i = 0; i < size; ++i) {
		*table++ = value;
		remainder += ratio.getDenominator();
		if (remainder >= num) {
			value += remainder / num;
			remainder %= num;
		}
	}
}

const CelScalerTable *CelScaler::getScalerTable(const Ratio &scaleX, const Ratio &scaleY) {
	activateScaleTables(scaleX, scaleY);
	return &_scaleTables[_activeIndex];
}

#pragma mark -
#pragma mark CelObj
bool CelObj::_drawBlackLines = false;

void CelObj::init() {
	CelObj::deinit();
	_drawBlackLines = false;
	_nextCacheId = 1;
	_scaler = new CelScaler();
	_cache = new CelCache;
	_cache->resize(100);
}

void CelObj::deinit() {
	delete _scaler;
	_scaler = nullptr;
	if (_cache != nullptr) {
		for (CelCache::iterator it = _cache->begin(); it != _cache->end(); ++it) {
			delete it->celObj;
		}
	}
	delete _cache;
	_cache = nullptr;
}

#pragma mark -
#pragma mark CelObj - Scalers

template<bool FLIP, typename READER>
struct SCALER_NoScale {
#ifndef NDEBUG
	const byte *_rowEdge;
#endif
	const byte *_row;
	READER _reader;
	const int16 _lastIndex;
	const int16 _sourceX;
	const int16 _sourceY;

	SCALER_NoScale(const CelObj &celObj, const int16 maxWidth, const Common::Point &scaledPosition) :
	_row(nullptr),
	_reader(celObj, FLIP ? celObj._width : maxWidth),
	_lastIndex(celObj._width - 1),
	_sourceX(scaledPosition.x),
	_sourceY(scaledPosition.y) {}

	inline void setTarget(const int16 x, const int16 y) {
		_row = _reader.getRow(y - _sourceY);

		if (FLIP) {
#ifndef NDEBUG
			_rowEdge = _row - 1;
#endif
			_row += _lastIndex - (x - _sourceX);
			assert(_row > _rowEdge);
		} else {
#ifndef NDEBUG
			_rowEdge = _row + _lastIndex + 1;
#endif
			_row += x - _sourceX;
			assert(_row < _rowEdge);
		}
	}

	inline byte read() {
		assert(_row != _rowEdge);

		if (FLIP) {
			return *_row--;
		} else {
			return *_row++;
		}
	}
};

template<bool FLIP, typename READER>
struct SCALER_Scale {
#ifndef NDEBUG
	int16 _minX;
	int16 _maxX;
#endif
	const byte *_row;
	READER _reader;
	int16 _x;
	static int16 _valuesX[kCelScalerTableSize];
	static int16 _valuesY[kCelScalerTableSize];

	SCALER_Scale(const CelObj &celObj, const Common::Rect &targetRect, const Common::Point &scaledPosition, const Ratio scaleX, const Ratio scaleY) :
	_row(nullptr),
#ifndef NDEBUG
	_minX(targetRect.left),
	_maxX(targetRect.right - 1),
#endif
	// The maximum width of the scaled object may not be as
	// wide as the source data it requires if downscaling,
	// so just always make the reader decompress an entire
	// line of source data when scaling
	_reader(celObj, celObj._width) {
#ifndef NDEBUG
		assert(_minX <= _maxX);
#endif

		// In order for scaling ratios to apply equally across objects that
		// start at different positions on the screen (like the cels of a
		// picture), the pixels that are read from the source bitmap must all
		// use the same pattern of division. In other words, cels must follow
		// a global scaling pattern as if they were always drawn starting at an
		// even multiple of the scaling ratio, even if they are not.
		//
		// To get the correct source pixel when reading out through the scaler,
		// the engine creates a lookup table for each axis that translates
		// directly from target positions to the indexes of source pixels using
		// the global cadence for the given scaling ratio.
		//
		// Note, however, that not all games use the global scaling mode.
		//
		// SQ6 definitely uses the global scaling mode (an easy visual
		// comparison is to leave Implants N' Stuff and then look at Roger);
		// Torin definitely does not (scaling subtitle backgrounds will cause it
		// to attempt a read out of bounds and crash). They are both SCI
		// "2.1mid" games, so currently the common denominator looks to be that
		// games which use global scaling are the ones that use low-resolution
		// script coordinates too.

		const CelScalerTable *table = CelObj::_scaler->getScalerTable(scaleX, scaleY);

		if (g_sci->_gfxFrameout->getCurrentBuffer().scriptWidth == kLowResX) {
			const int16 unscaledX = (scaledPosition.x / scaleX).toInt();
			if (FLIP) {
				const int lastIndex = celObj._width - 1;
				for (int16 x = targetRect.left; x < targetRect.right; ++x) {
					_valuesX[x] = lastIndex - (table->valuesX[x] - unscaledX);
				}
			} else {
				for (int16 x = targetRect.left; x < targetRect.right; ++x) {
					_valuesX[x] = table->valuesX[x] - unscaledX;
				}
			}

			const int16 unscaledY = (scaledPosition.y / scaleY).toInt();
			for (int16 y = targetRect.top; y < targetRect.bottom; ++y) {
				_valuesY[y] = table->valuesY[y] - unscaledY;
			}
		} else {
			if (FLIP) {
				const int lastIndex = celObj._width - 1;
				for (int16 x = targetRect.left; x < targetRect.right; ++x) {
					_valuesX[x] = lastIndex - table->valuesX[x - scaledPosition.x];
				}
			} else {
				for (int16 x = targetRect.left; x < targetRect.right; ++x) {
					_valuesX[x] = table->valuesX[x - scaledPosition.x];
				}
			}

			for (int16 y = targetRect.top; y < targetRect.bottom; ++y) {
				_valuesY[y] = table->valuesY[y - scaledPosition.y];
			}
		}
	}

	inline void setTarget(const int16 x, const int16 y) {
		_row = _reader.getRow(_valuesY[y]);
		_x = x;
		assert(_x >= _minX && _x <= _maxX);
	}

	inline byte read() {
		assert(_x >= _minX && _x <= _maxX);
		return _row[_valuesX[_x++]];
	}
};

template<bool FLIP, typename READER>
int16 SCALER_Scale<FLIP, READER>::_valuesX[kCelScalerTableSize];
template<bool FLIP, typename READER>
int16 SCALER_Scale<FLIP, READER>::_valuesY[kCelScalerTableSize];

#pragma mark -
#pragma mark CelObj - Resource readers

struct READER_Uncompressed {
private:
#ifndef NDEBUG
	const int16 _sourceHeight;
#endif
	const byte *_pixels;
	const int16 _sourceWidth;

public:
	READER_Uncompressed(const CelObj &celObj, const int16) :
#ifndef NDEBUG
	_sourceHeight(celObj._height),
#endif
	_sourceWidth(celObj._width) {
		const byte *resource = celObj.getResPointer();
		_pixels = resource + READ_SCI11ENDIAN_UINT32(resource + celObj._celHeaderOffset + 24);
	}

	inline const byte *getRow(const int16 y) const {
		assert(y >= 0 && y < _sourceHeight);
		return _pixels + y * _sourceWidth;
	}
};

struct READER_Compressed {
private:
	const byte *const _resource;
	byte _buffer[kCelScalerTableSize];
	uint32 _controlOffset;
	uint32 _dataOffset;
	uint32 _uncompressedDataOffset;
	int16 _y;
	const int16 _sourceHeight;
	const uint8 _skipColor;
	const int16 _maxWidth;

public:
	READER_Compressed(const CelObj &celObj, const int16 maxWidth) :
	_resource(celObj.getResPointer()),
	_y(-1),
	_sourceHeight(celObj._height),
	_skipColor(celObj._skipColor),
	_maxWidth(maxWidth) {
		assert(maxWidth <= celObj._width);

		const byte *const celHeader = _resource + celObj._celHeaderOffset;
		_dataOffset = READ_SCI11ENDIAN_UINT32(celHeader + 24);
		_uncompressedDataOffset = READ_SCI11ENDIAN_UINT32(celHeader + 28);
		_controlOffset = READ_SCI11ENDIAN_UINT32(celHeader + 32);
	}

	inline const byte *getRow(const int16 y) {
		assert(y >= 0 && y < _sourceHeight);
		if (y != _y) {
			// compressed data segment for row
			const byte *row = _resource + _dataOffset + READ_SCI11ENDIAN_UINT32(_resource + _controlOffset + y * 4);

			// uncompressed data segment for row
			const byte *literal = _resource + _uncompressedDataOffset + READ_SCI11ENDIAN_UINT32(_resource + _controlOffset + _sourceHeight * 4 + y * 4);

			uint8 length;
			for (int16 i = 0; i < _maxWidth; i += length) {
				const byte controlByte = *row++;
				length = controlByte;

				// Run-length encoded
				if (controlByte & 0x80) {
					length &= 0x3F;
					assert(i + length < (int)sizeof(_buffer));

					// Fill with skip color
					if (controlByte & 0x40) {
						memset(_buffer + i, _skipColor, length);
					// Next value is fill color
					} else {
						memset(_buffer + i, *literal, length);
						++literal;
					}
				// Uncompressed
				} else {
					assert(i + length < (int)sizeof(_buffer));
					memcpy(_buffer + i, literal, length);
					literal += length;
				}
			}
			_y = y;
		}

		return _buffer;
	}
};

#pragma mark -
#pragma mark CelObj - Remappers

/**
 * Pixel mapper for a CelObj with transparent pixels and no
 * remapping data.
 */
struct MAPPER_NoMD {
	inline void draw(byte *target, const byte pixel, const uint8 skipColor) const {
		if (pixel != skipColor) {
			*target = pixel;
		}
	}
};

/**
 * Pixel mapper for a CelObj with no transparent pixels and
 * no remapping data.
 */
struct MAPPER_NoMDNoSkip {
	inline void draw(byte *target, const byte pixel, const uint8) const {
		*target = pixel;
	}
};

/**
 * Pixel mapper for a CelObj with transparent pixels,
 * remapping data, and remapping enabled.
 */
struct MAPPER_Map {
	inline void draw(byte *target, const byte pixel, const uint8 skipColor) const {
		if (pixel != skipColor) {
			// NOTE: For some reason, SSCI never checks if the source
			// pixel is *above* the range of remaps.
			if (pixel < g_sci->_gfxRemap32->getStartColor()) {
				*target = pixel;
			} else if (g_sci->_gfxRemap32->remapEnabled(pixel)) {
				*target = g_sci->_gfxRemap32->remapColor(pixel, *target);
			}
		}
	}
};

/**
 * Pixel mapper for a CelObj with transparent pixels,
 * remapping data, and remapping disabled.
 */
struct MAPPER_NoMap {
	inline void draw(byte *target, const byte pixel, const uint8 skipColor) const {
		// NOTE: For some reason, SSCI never checks if the source
		// pixel is *above* the range of remaps.
		if (pixel != skipColor && pixel < g_sci->_gfxRemap32->getStartColor()) {
			*target = pixel;
		}
	}
};

void CelObj::draw(Buffer &target, const ScreenItem &screenItem, const Common::Rect &targetRect) const {
	const Common::Point &scaledPosition = screenItem._scaledPosition;
	const Ratio &scaleX = screenItem._ratioX;
	const Ratio &scaleY = screenItem._ratioY;
	_drawBlackLines = screenItem._drawBlackLines;

	if (_remap) {
		// NOTE: In the original code this check was `g_Remap_numActiveRemaps && _remap`,
		// but since we are already in a `_remap` branch, there is no reason to check it
		// again
		if (g_sci->_gfxRemap32->getRemapCount()) {
			if (scaleX.isOne() && scaleY.isOne()) {
				if (_compressionType == kCelCompressionNone) {
					if (_drawMirrored) {
						drawUncompHzFlipMap(target, targetRect, scaledPosition);
					} else {
						drawUncompNoFlipMap(target, targetRect, scaledPosition);
					}
				} else {
					if (_drawMirrored) {
						drawHzFlipMap(target, targetRect, scaledPosition);
					} else {
						drawNoFlipMap(target, targetRect, scaledPosition);
					}
				}
			} else {
				if (_compressionType == kCelCompressionNone) {
					scaleDrawUncompMap(target, scaleX, scaleY, targetRect, scaledPosition);
				} else {
					scaleDrawMap(target, scaleX, scaleY, targetRect, scaledPosition);
				}
			}
		} else {
			if (scaleX.isOne() && scaleY.isOne()) {
				if (_compressionType == kCelCompressionNone) {
					if (_drawMirrored) {
						drawUncompHzFlip(target, targetRect, scaledPosition);
					} else {
						drawUncompNoFlip(target, targetRect, scaledPosition);
					}
				} else {
					if (_drawMirrored) {
						drawHzFlip(target, targetRect, scaledPosition);
					} else {
						drawNoFlip(target, targetRect, scaledPosition);
					}
				}
			} else {
				if (_compressionType == kCelCompressionNone) {
					scaleDrawUncomp(target, scaleX, scaleY, targetRect, scaledPosition);
				} else {
					scaleDraw(target, scaleX, scaleY, targetRect, scaledPosition);
				}
			}
		}
	} else {
		if (scaleX.isOne() && scaleY.isOne()) {
			if (_compressionType == kCelCompressionNone) {
				if (_transparent) {
					if (_drawMirrored) {
						drawUncompHzFlipNoMD(target, targetRect, scaledPosition);
					} else {
						drawUncompNoFlipNoMD(target, targetRect, scaledPosition);
					}
				} else {
					if (_drawMirrored) {
						drawUncompHzFlipNoMDNoSkip(target, targetRect, scaledPosition);
					} else {
						drawUncompNoFlipNoMDNoSkip(target, targetRect, scaledPosition);
					}
				}
			} else {
				if (_drawMirrored) {
					drawHzFlipNoMD(target, targetRect, scaledPosition);
				} else {
					drawNoFlipNoMD(target, targetRect, scaledPosition);
				}
			}
		} else {
			if (_compressionType == kCelCompressionNone) {
				scaleDrawUncompNoMD(target, scaleX, scaleY, targetRect, scaledPosition);
			} else {
				scaleDrawNoMD(target, scaleX, scaleY, targetRect, scaledPosition);
			}
		}
	}

	_drawBlackLines = false;
}

void CelObj::draw(Buffer &target, const ScreenItem &screenItem, const Common::Rect &targetRect, bool mirrorX) {
	_drawMirrored = mirrorX;
	draw(target, screenItem, targetRect);
}

void CelObj::draw(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition, const bool mirrorX) {
	_drawMirrored = mirrorX;
	Ratio square;
	drawTo(target, targetRect, scaledPosition, square, square);
}

void CelObj::drawTo(Buffer &target, Common::Rect const &targetRect, Common::Point const &scaledPosition, Ratio const &scaleX, Ratio const &scaleY) const {
	if (_remap) {
		if (scaleX.isOne() && scaleY.isOne()) {
			if (_compressionType == kCelCompressionNone) {
				if (_drawMirrored) {
					drawUncompHzFlipMap(target, targetRect, scaledPosition);
				} else {
					drawUncompNoFlipMap(target, targetRect, scaledPosition);
				}
			} else {
				if (_drawMirrored) {
					drawHzFlipMap(target, targetRect, scaledPosition);
				} else {
					drawNoFlipMap(target, targetRect, scaledPosition);
				}
			}
		} else {
			if (_compressionType == kCelCompressionNone) {
				scaleDrawUncompMap(target, scaleX, scaleY, targetRect, scaledPosition);
			} else {
				scaleDrawMap(target, scaleX, scaleY, targetRect, scaledPosition);
			}
		}
	} else {
		if (scaleX.isOne() && scaleY.isOne()) {
			if (_compressionType == kCelCompressionNone) {
				if (_drawMirrored) {
					drawUncompHzFlipNoMD(target, targetRect, scaledPosition);
				} else {
					drawUncompNoFlipNoMD(target, targetRect, scaledPosition);
				}
			} else {
				if (_drawMirrored) {
					drawHzFlipNoMD(target, targetRect, scaledPosition);
				} else {
					drawNoFlipNoMD(target, targetRect, scaledPosition);
				}
			}
		} else {
			if (_compressionType == kCelCompressionNone) {
				scaleDrawUncompNoMD(target, scaleX, scaleY, targetRect, scaledPosition);
			} else {
				scaleDrawNoMD(target, scaleX, scaleY, targetRect, scaledPosition);
			}
		}
	}
}

uint8 CelObj::readPixel(uint16 x, const uint16 y, bool mirrorX) const {
	if (mirrorX) {
		x = _width - x - 1;
	}

	if (_compressionType == kCelCompressionNone) {
		READER_Uncompressed reader(*this, x + 1);
		return reader.getRow(y)[x];
	} else {
		READER_Compressed reader(*this, x + 1);
		return reader.getRow(y)[x];
	}
}

void CelObj::submitPalette() const {
	if (_hunkPaletteOffset) {
		const HunkPalette palette(getResPointer() + _hunkPaletteOffset);
		g_sci->_gfxPalette32->submit(palette);
	}
}

#pragma mark -
#pragma mark CelObj - Caching

int CelObj::_nextCacheId = 1;
CelCache *CelObj::_cache = nullptr;

int CelObj::searchCache(const CelInfo32 &celInfo, int *const nextInsertIndex) const {
	*nextInsertIndex = -1;
	int oldestId = _nextCacheId + 1;
	int oldestIndex = 0;

	for (int i = 0, len = _cache->size(); i < len; ++i) {
		CelCacheEntry &entry = (*_cache)[i];

		if (entry.celObj == nullptr) {
			if (*nextInsertIndex == -1) {
				*nextInsertIndex = i;
			}
		} else if (entry.celObj->_info == celInfo) {
			entry.id = ++_nextCacheId;
			return i;
		} else if (oldestId > entry.id) {
			oldestId = entry.id;
			oldestIndex = i;
		}
	}

	if (*nextInsertIndex == -1) {
		*nextInsertIndex = oldestIndex;
	}

	return -1;
}

void CelObj::putCopyInCache(const int cacheIndex) const {
	if (cacheIndex == -1) {
		error("Invalid cache index");
	}

	CelCacheEntry &entry = (*_cache)[cacheIndex];

	if (entry.celObj != nullptr) {
		delete entry.celObj;
	}

	entry.celObj = duplicate();
	entry.id = ++_nextCacheId;
}

#pragma mark -
#pragma mark CelObj - Drawing

template<typename MAPPER, typename SCALER, bool DRAW_BLACK_LINES>
struct RENDERER {
	MAPPER &_mapper;
	SCALER &_scaler;
	const uint8 _skipColor;

	RENDERER(MAPPER &mapper, SCALER &scaler, const uint8 skipColor) :
	_mapper(mapper),
	_scaler(scaler),
	_skipColor(skipColor) {}

	inline void draw(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
		byte *targetPixel = (byte *)target.getPixels() + target.screenWidth * targetRect.top + targetRect.left;

		const int16 skipStride = target.screenWidth - targetRect.width();
		const int16 targetWidth = targetRect.width();
		const int16 targetHeight = targetRect.height();
		for (int16 y = 0; y < targetHeight; ++y) {
			if (DRAW_BLACK_LINES && (y % 2) == 0) {
				memset(targetPixel, 0, targetWidth);
				targetPixel += targetWidth + skipStride;
				continue;
			}

			_scaler.setTarget(targetRect.left, targetRect.top + y);

			for (int16 x = 0; x < targetWidth; ++x) {
				_mapper.draw(targetPixel++, _scaler.read(), _skipColor);
			}

			targetPixel += skipStride;
		}
	}
};

template<typename MAPPER, typename SCALER>
void CelObj::render(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {

	MAPPER mapper;
	SCALER scaler(*this, targetRect.left - scaledPosition.x + targetRect.width(), scaledPosition);
	RENDERER<MAPPER, SCALER, false> renderer(mapper, scaler, _skipColor);
	renderer.draw(target, targetRect, scaledPosition);
}

template<typename MAPPER, typename SCALER>
void CelObj::render(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition, const Ratio &scaleX, const Ratio &scaleY) const {

	MAPPER mapper;
	SCALER scaler(*this, targetRect, scaledPosition, scaleX, scaleY);
	if (_drawBlackLines) {
		RENDERER<MAPPER, SCALER, true> renderer(mapper, scaler, _skipColor);
		renderer.draw(target, targetRect, scaledPosition);
	} else {
		RENDERER<MAPPER, SCALER, false> renderer(mapper, scaler, _skipColor);
		renderer.draw(target, targetRect, scaledPosition);
	}
}

void CelObj::drawHzFlip(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	render<MAPPER_NoMap, SCALER_NoScale<true, READER_Compressed> >(target, targetRect, scaledPosition);
}

void CelObj::drawNoFlip(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	render<MAPPER_NoMap, SCALER_NoScale<false, READER_Compressed> >(target, targetRect, scaledPosition);
}

void CelObj::drawUncompNoFlip(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	render<MAPPER_NoMap, SCALER_NoScale<false, READER_Uncompressed> >(target, targetRect, scaledPosition);
}

void CelObj::drawUncompHzFlip(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	render<MAPPER_NoMap, SCALER_NoScale<true, READER_Uncompressed> >(target, targetRect, scaledPosition);
}

void CelObj::scaleDraw(Buffer &target, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	if (_drawMirrored) {
		render<MAPPER_NoMap, SCALER_Scale<true, READER_Compressed> >(target, targetRect, scaledPosition, scaleX, scaleY);
	} else {
		render<MAPPER_NoMap, SCALER_Scale<false, READER_Compressed> >(target, targetRect, scaledPosition, scaleX, scaleY);
	}
}

void CelObj::scaleDrawUncomp(Buffer &target, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	if (_drawMirrored) {
		render<MAPPER_NoMap, SCALER_Scale<true, READER_Uncompressed> >(target, targetRect, scaledPosition, scaleX, scaleY);
	} else {
		render<MAPPER_NoMap, SCALER_Scale<false, READER_Uncompressed> >(target, targetRect, scaledPosition, scaleX, scaleY);
	}
}

void CelObj::drawHzFlipMap(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	render<MAPPER_Map, SCALER_NoScale<true, READER_Compressed> >(target, targetRect, scaledPosition);
}

void CelObj::drawNoFlipMap(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	render<MAPPER_Map, SCALER_NoScale<false, READER_Compressed> >(target, targetRect, scaledPosition);
}

void CelObj::drawUncompNoFlipMap(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	render<MAPPER_Map, SCALER_NoScale<false, READER_Uncompressed> >(target, targetRect, scaledPosition);
}

void CelObj::drawUncompHzFlipMap(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	render<MAPPER_Map, SCALER_NoScale<true, READER_Uncompressed> >(target, targetRect, scaledPosition);
}

void CelObj::scaleDrawMap(Buffer &target, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	if (_drawMirrored) {
		render<MAPPER_Map, SCALER_Scale<true, READER_Compressed> >(target, targetRect, scaledPosition, scaleX, scaleY);
	} else {
		render<MAPPER_Map, SCALER_Scale<false, READER_Compressed> >(target, targetRect, scaledPosition, scaleX, scaleY);
	}
}

void CelObj::scaleDrawUncompMap(Buffer &target, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	if (_drawMirrored) {
		render<MAPPER_Map, SCALER_Scale<true, READER_Uncompressed> >(target, targetRect, scaledPosition, scaleX, scaleY);
	} else {
		render<MAPPER_Map, SCALER_Scale<false, READER_Uncompressed> >(target, targetRect, scaledPosition, scaleX, scaleY);
	}
}

void CelObj::drawNoFlipNoMD(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	render<MAPPER_NoMD, SCALER_NoScale<false, READER_Compressed> >(target, targetRect, scaledPosition);
}

void CelObj::drawHzFlipNoMD(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	render<MAPPER_NoMD, SCALER_NoScale<true, READER_Compressed> >(target, targetRect, scaledPosition);
}

void CelObj::drawUncompNoFlipNoMD(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	render<MAPPER_NoMD, SCALER_NoScale<false, READER_Uncompressed> >(target, targetRect, scaledPosition);
}

void CelObj::drawUncompNoFlipNoMDNoSkip(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	render<MAPPER_NoMDNoSkip, SCALER_NoScale<false, READER_Uncompressed> >(target, targetRect, scaledPosition);
}

void CelObj::drawUncompHzFlipNoMD(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	render<MAPPER_NoMD, SCALER_NoScale<true, READER_Uncompressed> >(target, targetRect, scaledPosition);
}

void CelObj::drawUncompHzFlipNoMDNoSkip(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	render<MAPPER_NoMDNoSkip, SCALER_NoScale<true, READER_Uncompressed> >(target, targetRect, scaledPosition);
}

void CelObj::scaleDrawNoMD(Buffer &target, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	// In SSCI the checks are > because their rects are BR-inclusive;
	// our checks are >= because our rects are BR-exclusive
	if (g_sci->_features->hasEmptyScaleDrawHack() &&
		(targetRect.left >= targetRect.right ||
		 targetRect.top >= targetRect.bottom)) {
		return;
	}

	if (_drawMirrored)
		render<MAPPER_NoMD, SCALER_Scale<true, READER_Compressed> >(target, targetRect, scaledPosition, scaleX, scaleY);
	else
		render<MAPPER_NoMD, SCALER_Scale<false, READER_Compressed> >(target, targetRect, scaledPosition, scaleX, scaleY);
}

void CelObj::scaleDrawUncompNoMD(Buffer &target, const Ratio &scaleX, const Ratio &scaleY, const Common::Rect &targetRect, const Common::Point &scaledPosition) const {
	// In SSCI the checks are > because their rects are BR-inclusive;
	// our checks are >= because our rects are BR-exclusive
	if (g_sci->_features->hasEmptyScaleDrawHack() &&
		(targetRect.left >= targetRect.right ||
		 targetRect.top >= targetRect.bottom)) {
		return;
	}

	if (_drawMirrored) {
		render<MAPPER_NoMD, SCALER_Scale<true, READER_Uncompressed> >(target, targetRect, scaledPosition, scaleX, scaleY);
	} else {
		render<MAPPER_NoMD, SCALER_Scale<false, READER_Uncompressed> >(target, targetRect, scaledPosition, scaleX, scaleY);
	}
}

#pragma mark -
#pragma mark CelObjView

int16 CelObjView::getNumLoops(const GuiResourceId viewId) {
	const Resource *const resource = g_sci->getResMan()->findResource(ResourceId(kResourceTypeView, viewId), false);

	if (!resource) {
		return 0;
	}

	assert(resource->size >= 3);
	return resource->data[2];
}

int16 CelObjView::getNumCels(const GuiResourceId viewId, int16 loopNo) {
	const Resource *const resource = g_sci->getResMan()->findResource(ResourceId(kResourceTypeView, viewId), false);

	if (!resource) {
		return 0;
	}

	const byte *const data = resource->data;

	const uint16 loopCount = data[2];

	// Every version of SCI32 has a logic error in this function that causes
	// random memory to be read if a script requests the cel count for one
	// past the maximum loop index. For example, GK1 room 808 does this, and
	// gets stuck in an infinite loop because the game script expects this
	// method to return a non-zero value.
	// This bug is triggered in basically every SCI32 game and appears to be
	// universally fixable simply by always using the next lowest loop instead.
	if (loopNo == loopCount) {
		const SciCallOrigin origin = g_sci->getEngineState()->getCurrentCallOrigin();
		debugC(kDebugLevelWorkarounds, "Workaround: kNumCels loop %d -> loop %d in view %u, %s", loopNo, loopNo - 1, viewId, origin.toString().c_str());
		--loopNo;
	}

	if (loopNo > loopCount || loopNo < 0) {
		return 0;
	}

	const uint16 viewHeaderSize = READ_SCI11ENDIAN_UINT16(data);
	const uint8 loopHeaderSize = data[12];
	const uint8 viewHeaderFieldSize = 2;

#ifndef NDEBUG
	const byte *const dataMax = data + resource->size;
#endif
	const byte *loopHeader = data + viewHeaderFieldSize + viewHeaderSize + (loopHeaderSize * loopNo);
	assert(loopHeader + 3 <= dataMax);

	if ((int8)loopHeader[0] != -1) {
		loopHeader = data + viewHeaderFieldSize + viewHeaderSize + (loopHeaderSize * (int8)loopHeader[0]);
		assert(loopHeader >= data && loopHeader + 3 <= dataMax);
	}

	return loopHeader[2];
}

CelObjView::CelObjView(const GuiResourceId viewId, const int16 loopNo, const int16 celNo) {
	_info.type = kCelTypeView;
	_info.resourceId = viewId;
	_info.loopNo = loopNo;
	_info.celNo = celNo;
	_mirrorX = false;
	_compressionType = kCelCompressionInvalid;
	_transparent = true;

	int cacheInsertIndex;
	const int cacheIndex = searchCache(_info, &cacheInsertIndex);
	if (cacheIndex != -1) {
		CelCacheEntry &entry = (*_cache)[cacheIndex];
		const CelObjView *const cachedCelObj = dynamic_cast<CelObjView *>(entry.celObj);
		if (cachedCelObj == nullptr) {
			error("Expected a CelObjView in cache slot %d", cacheIndex);
		}
		*this = *cachedCelObj;
		entry.id = ++_nextCacheId;
		return;
	}

	// TODO: The next code should be moved to a common file that
	// generates view resource metadata for both SCI16 and SCI32
	// implementations

	const Resource *const resource = g_sci->getResMan()->findResource(ResourceId(kResourceTypeView, viewId), false);

	// NOTE: SCI2.1/SQ6 just silently returns here.
	if (!resource) {
		error("View resource %d not found", viewId);
	}

	const byte *const data = resource->data;

	_xResolution = READ_SCI11ENDIAN_UINT16(data + 14);
	_yResolution = READ_SCI11ENDIAN_UINT16(data + 16);

	if (_xResolution == 0 && _yResolution == 0) {
		byte sizeFlag = data[5];
		if (sizeFlag == 0) {
			_xResolution = kLowResX;
			_yResolution = kLowResY;
		} else if (sizeFlag == 1) {
			_xResolution = 640;
			_yResolution = 480;
		} else if (sizeFlag == 2) {
			_xResolution = 640;
			_yResolution = 400;
		}
	}

	const uint16 loopCount = data[2];
	if (_info.loopNo >= loopCount) {
		_info.loopNo = loopCount - 1;
	}

	// NOTE: This is the actual check, in the actual location,
	// from SCI engine.
	if (loopNo < 0) {
		error("Loop is less than 0");
	}

	const uint16 viewHeaderSize = READ_SCI11ENDIAN_UINT16(data);
	const uint8 loopHeaderSize = data[12];
	const uint8 viewHeaderFieldSize = 2;

	const byte *loopHeader = data + viewHeaderFieldSize + viewHeaderSize + (loopHeaderSize * _info.loopNo);

	if ((int8)loopHeader[0] != -1) {
		if (loopHeader[1] == 1) {
			_mirrorX = true;
		}

		loopHeader = data + viewHeaderFieldSize + viewHeaderSize + (loopHeaderSize * (int8)loopHeader[0]);
	}

	uint8 celCount = loopHeader[2];
	if (_info.celNo >= celCount) {
		_info.celNo = celCount - 1;
	}

	// A celNo can be negative and still valid. At least PQ4CD uses this strange
	// arrangement to load its high-resolution main menu resource. In PQ4CD, the
	// low-resolution menu is at view 23, loop 9, cel 0, and the high-resolution
	// menu is at view 2300, loop 0, cel 0. View 2300 is specially crafted to
	// have 2 loops, with the second loop having 0 cels. When in high-resolution
	// mode, the game scripts only change the view resource ID from 23 to 2300,
	// leaving loop 9 and cel 0 the same. The code in CelObjView constructor
	// auto-corrects loop 9 to loop 1, and then auto-corrects the cel number
	// from 0 to -1, which effectively causes loop 0, cel 0 to be read.
	if (_info.celNo < 0 && _info.loopNo == 0) {
		error("Cel is less than 0 on loop 0");
	}

	_hunkPaletteOffset = READ_SCI11ENDIAN_UINT32(data + 8);
	_celHeaderOffset = READ_SCI11ENDIAN_UINT32(loopHeader + 12) + (data[13] * _info.celNo);

	const byte *const celHeader = data + _celHeaderOffset;

	_width = READ_SCI11ENDIAN_UINT16(celHeader);
	_height = READ_SCI11ENDIAN_UINT16(celHeader + 2);
	_origin.x = _width / 2 - (int16)READ_SCI11ENDIAN_UINT16(celHeader + 4);
	if (g_sci->_features->usesAlternateSelectors() && _mirrorX) {
		_origin.x = _width - _origin.x - 1;
	}
	_origin.y = _height - (int16)READ_SCI11ENDIAN_UINT16(celHeader + 6) - 1;
	_skipColor = celHeader[8];
	_compressionType = (CelCompressionType)celHeader[9];

	if (_compressionType != kCelCompressionNone && _compressionType != kCelCompressionRLE) {
		error("Compression type not supported - V: %d  L: %d  C: %d", _info.resourceId, _info.loopNo, _info.celNo);
	}

	if (celHeader[10] & 128) {
		// NOTE: This is correct according to SCI2.1/SQ6/DOS;
		// the engine re-reads the byte value as a word value
		uint16 flags = READ_SCI11ENDIAN_UINT16(celHeader + 10);
		_transparent = flags & 1 ? true : false;
		_remap = flags & 2 ? true : false;
	} else if (_compressionType == kCelCompressionNone) {
		_remap = analyzeUncompressedForRemap();
	} else {
		_remap = analyzeForRemap();
	}

	putCopyInCache(cacheInsertIndex);
}

bool CelObjView::analyzeUncompressedForRemap() const {
	const byte *pixels = getResPointer() + READ_SCI11ENDIAN_UINT32(getResPointer() + _celHeaderOffset + 24);
	for (int i = 0; i < _width * _height; ++i) {
		const byte pixel = pixels[i];
		if (
			pixel >= g_sci->_gfxRemap32->getStartColor() &&
			pixel <= g_sci->_gfxRemap32->getEndColor() &&
			pixel != _skipColor
		) {
			return true;
		}
	}
	return false;
}

bool CelObjView::analyzeForRemap() const {
	READER_Compressed reader(*this, _width);
	for (int y = 0; y < _height; y++) {
		const byte *const curRow = reader.getRow(y);
		for (int x = 0; x < _width; x++) {
			const byte pixel = curRow[x];
			if (
				pixel >= g_sci->_gfxRemap32->getStartColor() &&
				pixel <= g_sci->_gfxRemap32->getEndColor() &&
				pixel != _skipColor
			) {
				return true;
			}
		}
	}
	return false;
}

void CelObjView::draw(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition, bool mirrorX, const Ratio &scaleX, const Ratio &scaleY) {
	_drawMirrored = mirrorX;
	drawTo(target, targetRect, scaledPosition, scaleX, scaleY);
}

CelObjView *CelObjView::duplicate() const {
	return new CelObjView(*this);
}

byte *CelObjView::getResPointer() const {
	Resource *const resource = g_sci->getResMan()->findResource(ResourceId(kResourceTypeView, _info.resourceId), false);
	if (resource == nullptr) {
		error("Failed to load view %d from resource manager", _info.resourceId);
	}
	return resource->data;
}

#pragma mark -
#pragma mark CelObjPic

CelObjPic::CelObjPic(const GuiResourceId picId, const int16 celNo) {
	_info.type = kCelTypePic;
	_info.resourceId = picId;
	_info.loopNo = 0;
	_info.celNo = celNo;
	_mirrorX = false;
	_compressionType = kCelCompressionInvalid;
	_transparent = true;
	_remap = false;

	int cacheInsertIndex;
	const int cacheIndex = searchCache(_info, &cacheInsertIndex);
	if (cacheIndex != -1) {
		CelCacheEntry &entry = (*_cache)[cacheIndex];
		const CelObjPic *const cachedCelObj = dynamic_cast<CelObjPic *>(entry.celObj);
		if (cachedCelObj == nullptr) {
			error("Expected a CelObjPic in cache slot %d", cacheIndex);
		}
		*this = *cachedCelObj;
		entry.id = ++_nextCacheId;
		return;
	}

	const Resource *const resource = g_sci->getResMan()->findResource(ResourceId(kResourceTypePic, picId), false);

	// NOTE: SCI2.1/SQ6 just silently returns here.
	if (!resource) {
		error("Pic resource %d not found", picId);
	}

	const byte *const data = resource->data;

	_celCount = data[2];

	if (_info.celNo >= _celCount) {
		error("Cel number %d greater than cel count %d", _info.celNo, _celCount);
	}

	_celHeaderOffset = READ_SCI11ENDIAN_UINT16(data) + (READ_SCI11ENDIAN_UINT16(data + 4) * _info.celNo);
	_hunkPaletteOffset = READ_SCI11ENDIAN_UINT32(data + 6);

	const byte *const celHeader = data + _celHeaderOffset;

	_width = READ_SCI11ENDIAN_UINT16(celHeader);
	_height = READ_SCI11ENDIAN_UINT16(celHeader + 2);
	_origin.x = (int16)READ_SCI11ENDIAN_UINT16(celHeader + 4);
	_origin.y = (int16)READ_SCI11ENDIAN_UINT16(celHeader + 6);
	_skipColor = celHeader[8];
	_compressionType = (CelCompressionType)celHeader[9];
	_priority = READ_SCI11ENDIAN_UINT16(celHeader + 36);
	_relativePosition.x = (int16)READ_SCI11ENDIAN_UINT16(celHeader + 38);
	_relativePosition.y = (int16)READ_SCI11ENDIAN_UINT16(celHeader + 40);

	const uint16 sizeFlag1 = READ_SCI11ENDIAN_UINT16(data + 10);
	const uint16 sizeFlag2 = READ_SCI11ENDIAN_UINT16(data + 12);

	if (sizeFlag2) {
		_xResolution = sizeFlag1;
		_yResolution = sizeFlag2;
	} else if (sizeFlag1 == 0) {
		_xResolution = kLowResX;
		_yResolution = kLowResY;
	} else if (sizeFlag1 == 1) {
		_xResolution = 640;
		_yResolution = 480;
	} else if (sizeFlag1 == 2) {
		_xResolution = 640;
		_yResolution = 400;
	}

	if (celHeader[10] & 128) {
		// NOTE: This is correct according to SCI2.1/SQ6/DOS;
		// the engine re-reads the byte value as a word value
		const uint16 flags = READ_SCI11ENDIAN_UINT16(celHeader + 10);
		_transparent = flags & 1 ? true : false;
		_remap = flags & 2 ? true : false;
	} else {
		_transparent = _compressionType != kCelCompressionNone ? true : analyzeUncompressedForSkip();

		if (_compressionType != kCelCompressionNone && _compressionType != kCelCompressionRLE) {
			error("Compression type not supported - P: %d  C: %d", picId, celNo);
		}
	}

	putCopyInCache(cacheInsertIndex);
}

bool CelObjPic::analyzeUncompressedForSkip() const {
	const byte *const resource = getResPointer();
	const byte *const pixels = resource + READ_SCI11ENDIAN_UINT32(resource + _celHeaderOffset + 24);
	for (int i = 0; i < _width * _height; ++i) {
		uint8 pixel = pixels[i];
		if (pixel == _skipColor) {
			return true;
		}
	}

	return false;
}

void CelObjPic::draw(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition, const bool mirrorX) {
	const Ratio square;
	_drawMirrored = mirrorX;
	drawTo(target, targetRect, scaledPosition, square, square);
}

CelObjPic *CelObjPic::duplicate() const {
	return new CelObjPic(*this);
}

byte *CelObjPic::getResPointer() const {
	const Resource *const resource = g_sci->getResMan()->findResource(ResourceId(kResourceTypePic, _info.resourceId), false);
	if (resource == nullptr) {
		error("Failed to load pic %d from resource manager", _info.resourceId);
	}
	return resource->data;
}

#pragma mark -
#pragma mark CelObjMem

CelObjMem::CelObjMem(const reg_t bitmapObject) {
	_info.type = kCelTypeMem;
	_info.bitmap = bitmapObject;
	_mirrorX = false;
	_compressionType = kCelCompressionNone;
	_celHeaderOffset = 0;
	_transparent = true;

	SciBitmap *bitmap = g_sci->getEngineState()->_segMan->lookupBitmap(bitmapObject);

	// NOTE: SSCI did no error checking here at all.
	if (!bitmap) {
		error("Bitmap %04x:%04x not found", PRINT_REG(bitmapObject));
	}

	_width = bitmap->getWidth();
	_height = bitmap->getHeight();
	_origin = bitmap->getOrigin();
	_skipColor = bitmap->getSkipColor();
	_xResolution = bitmap->getXResolution();
	_yResolution = bitmap->getYResolution();
	_hunkPaletteOffset = bitmap->getHunkPaletteOffset();
	_remap = bitmap->getRemap();
}

CelObjMem *CelObjMem::duplicate() const {
	return new CelObjMem(*this);
}

byte *CelObjMem::getResPointer() const {
	return g_sci->getEngineState()->_segMan->lookupBitmap(_info.bitmap)->getRawData();
}

#pragma mark -
#pragma mark CelObjColor

CelObjColor::CelObjColor(const uint8 color, const int16 width, const int16 height) {
	_info.type = kCelTypeColor;
	_info.color = color;
	_origin.x = 0;
	_origin.y = 0;
	_xResolution = g_sci->_gfxFrameout->getCurrentBuffer().scriptWidth;
	_yResolution = g_sci->_gfxFrameout->getCurrentBuffer().scriptHeight;
	_hunkPaletteOffset = 0;
	_mirrorX = false;
	_remap = false;
	_width = width;
	_height = height;
}

void CelObjColor::draw(Buffer &target, const ScreenItem &screenItem, const Common::Rect &targetRect, const bool mirrorX) {
	// TODO: The original engine sets this flag but why? One cannot
	// draw a solid color mirrored.
	_drawMirrored = mirrorX;
	draw(target, targetRect);
}
void CelObjColor::draw(Buffer &target, const Common::Rect &targetRect, const Common::Point &scaledPosition, bool mirrorX) {
	error("Unsupported method");
}
void CelObjColor::draw(Buffer &target, const Common::Rect &targetRect) const {
	target.fillRect(targetRect, _info.color);
}

CelObjColor *CelObjColor::duplicate() const {
	return new CelObjColor(*this);
}

byte *CelObjColor::getResPointer() const {
	error("Unsupported method");
}
} // End of namespace Sci