-
Notifications
You must be signed in to change notification settings - Fork 0
/
bmp.h
774 lines (653 loc) · 22.7 KB
/
bmp.h
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
/*
* Windows Bitmap File Loader
* Version 1.2.5 (20120929)
*
* Supported Formats: 1, 4, 8, 16, 24, 32 Bit Images
* Alpha Bitmaps are also supported.
* Supported compression types: RLE 8, BITFIELDS
*
* Created by: Benjamin Kalytta, 2006 - 2012
* Thanks for bug fixes goes to: Chris Campbell
*
* Licence: Free to use, URL to my source and my name is required in your source code.
*
* Source can be found at http://www.kalytta.com/bitmap.h
*
* Warning: This code should not be used in unmodified form in a production environment.
* It should only serve as a basis for your own development.
* There is only a minimal error handling in this code. (Notice added 20111211)
*/
#ifndef BITMAP_H
#define BITMAP_H
#include <iostream>
#include <fstream>
#include <string>
#ifndef __LITTLE_ENDIAN__
#ifndef __BIG_ENDIAN__
#define __LITTLE_ENDIAN__
#endif
#endif
#ifdef __LITTLE_ENDIAN__
#define BITMAP_SIGNATURE 0x4d42
#else
#define BITMAP_SIGNATURE 0x424d
#endif
#if defined(_MSC_VER) || defined(__INTEL_COMPILER)
typedef unsigned __int32 uint32_t;
typedef unsigned __int16 uint16_t;
typedef unsigned __int8 uint8_t;
typedef __int32 int32_t;
#elif defined(__GNUC__) || defined(__CYGWIN__) || defined(__MWERKS__) || defined(__WATCOMC__) || defined(__PGI) || defined(__LCC__)
#include <stdint.h>
#else
typedef unsigned int uint32_t;
typedef unsigned short int uint16_t;
typedef unsigned char uint8_t;
typedef int int32_t;
#endif
#pragma pack(push, 1)
typedef struct _BITMAP_FILEHEADER {
uint16_t Signature;
uint32_t Size;
uint32_t Reserved;
uint32_t BitsOffset;
} BITMAP_FILEHEADER;
#define BITMAP_FILEHEADER_SIZE 14
typedef struct _BITMAP_HEADER {
uint32_t HeaderSize;
int32_t Width;
int32_t Height;
uint16_t Planes;
uint16_t BitCount;
uint32_t Compression;
uint32_t SizeImage;
int32_t PelsPerMeterX;
int32_t PelsPerMeterY;
uint32_t ClrUsed;
uint32_t ClrImportant;
uint32_t RedMask;
uint32_t GreenMask;
uint32_t BlueMask;
uint32_t AlphaMask;
uint32_t CsType;
uint32_t Endpoints[9]; // see http://msdn2.microsoft.com/en-us/library/ms536569.aspx
uint32_t GammaRed;
uint32_t GammaGreen;
uint32_t GammaBlue;
} BITMAP_HEADER;
typedef struct _RGBA {
uint8_t Red;
uint8_t Green;
uint8_t Blue;
uint8_t Alpha;
} RGBA;
typedef struct _BGRA {
uint8_t Blue;
uint8_t Green;
uint8_t Red;
uint8_t Alpha;
} BGRA;
#pragma pack(pop)
class CBitmap {
private:
BITMAP_FILEHEADER m_BitmapFileHeader;
BITMAP_HEADER m_BitmapHeader;
RGBA *m_BitmapData;
unsigned int m_BitmapSize;
// Masks and bit counts shouldn't exceed 32 Bits
public:
class CColor {
public:
static inline unsigned int BitCountByMask(unsigned int Mask) {
unsigned int BitCount = 0;
while (Mask) {
Mask &= Mask - 1;
BitCount++;
}
return BitCount;
}
static inline unsigned int BitPositionByMask(unsigned int Mask) {
return BitCountByMask((Mask & (~Mask + 1)) - 1);
}
static inline unsigned int ComponentByMask(unsigned int Color, unsigned int Mask) {
unsigned int Component = Color & Mask;
return Component >> BitPositionByMask(Mask);
}
static inline unsigned int BitCountToMask(unsigned int BitCount) {
return (BitCount == 32) ? 0xFFFFFFFF : (1 << BitCount) - 1;
}
static unsigned int Convert(unsigned int Color, unsigned int FromBitCount, unsigned int ToBitCount) {
if (ToBitCount < FromBitCount) {
Color >>= (FromBitCount - ToBitCount);
} else {
Color <<= (ToBitCount - FromBitCount);
if (Color > 0) {
Color |= BitCountToMask(ToBitCount - FromBitCount);
}
}
return Color;
}
};
public:
CBitmap() : m_BitmapData(0), m_BitmapSize(0) {
Dispose();
}
CBitmap(const char* Filename) : m_BitmapData(0), m_BitmapSize(0) {
Load(Filename);
}
~CBitmap() {
Dispose();
}
void Dispose() {
if (m_BitmapData) {
delete[] m_BitmapData;
m_BitmapData = 0;
}
memset(&m_BitmapFileHeader, 0, sizeof(m_BitmapFileHeader));
memset(&m_BitmapHeader, 0, sizeof(m_BitmapHeader));
}
/* Load specified Bitmap and stores it as RGBA in an internal buffer */
bool Load(const char *Filename) {
std::ifstream file(Filename, std::ios::binary | std::ios::in);
if (file.bad()) {
return false;
}
if (file.is_open() == false) {
return false;
}
Dispose();
file.read((char*) &m_BitmapFileHeader, BITMAP_FILEHEADER_SIZE);
if (m_BitmapFileHeader.Signature != BITMAP_SIGNATURE) {
return false;
}
file.read((char*) &m_BitmapHeader, sizeof(BITMAP_HEADER));
/* Load Color Table */
file.seekg(BITMAP_FILEHEADER_SIZE + m_BitmapHeader.HeaderSize, std::ios::beg);
unsigned int ColorTableSize = 0;
if (m_BitmapHeader.BitCount == 1) {
ColorTableSize = 2;
} else if (m_BitmapHeader.BitCount == 4) {
ColorTableSize = 16;
} else if (m_BitmapHeader.BitCount == 8) {
ColorTableSize = 256;
}
// Always allocate full sized color table
BGRA* ColorTable = new BGRA[ColorTableSize]; // std::bad_alloc exception should be thrown if memory is not available
file.read((char*) ColorTable, sizeof(BGRA) * m_BitmapHeader.ClrUsed);
/* ... Color Table for 16 bits images are not supported yet */
m_BitmapSize = GetWidth() * GetHeight();
m_BitmapData = new RGBA[m_BitmapSize];
unsigned int LineWidth = ((GetWidth() * GetBitCount() / 8) + 3) & ~3;
uint8_t *Line = new uint8_t[LineWidth];
file.seekg(m_BitmapFileHeader.BitsOffset, std::ios::beg);
int Index = 0;
bool Result = true;
if (m_BitmapHeader.Compression == 0) {
for (unsigned int i = 0; i < GetHeight(); i++) {
file.read((char*) Line, LineWidth);
uint8_t *LinePtr = Line;
for (unsigned int j = 0; j < GetWidth(); j++) {
if (m_BitmapHeader.BitCount == 1) {
uint32_t Color = *((uint8_t*) LinePtr);
for (int k = 0; k < 8; k++) {
m_BitmapData[Index].Red = ColorTable[Color & 0x80 ? 1 : 0].Red;
m_BitmapData[Index].Green = ColorTable[Color & 0x80 ? 1 : 0].Green;
m_BitmapData[Index].Blue = ColorTable[Color & 0x80 ? 1 : 0].Blue;
m_BitmapData[Index].Alpha = ColorTable[Color & 0x80 ? 1 : 0].Alpha;
Index++;
Color <<= 1;
}
LinePtr++;
j += 7;
} else if (m_BitmapHeader.BitCount == 4) {
uint32_t Color = *((uint8_t*) LinePtr);
m_BitmapData[Index].Red = ColorTable[(Color >> 4) & 0x0f].Red;
m_BitmapData[Index].Green = ColorTable[(Color >> 4) & 0x0f].Green;
m_BitmapData[Index].Blue = ColorTable[(Color >> 4) & 0x0f].Blue;
m_BitmapData[Index].Alpha = ColorTable[(Color >> 4) & 0x0f].Alpha;
Index++;
m_BitmapData[Index].Red = ColorTable[Color & 0x0f].Red;
m_BitmapData[Index].Green = ColorTable[Color & 0x0f].Green;
m_BitmapData[Index].Blue = ColorTable[Color & 0x0f].Blue;
m_BitmapData[Index].Alpha = ColorTable[Color & 0x0f].Alpha;
Index++;
LinePtr++;
j++;
} else if (m_BitmapHeader.BitCount == 8) {
uint32_t Color = *((uint8_t*) LinePtr);
m_BitmapData[Index].Red = ColorTable[Color].Red;
m_BitmapData[Index].Green = ColorTable[Color].Green;
m_BitmapData[Index].Blue = ColorTable[Color].Blue;
m_BitmapData[Index].Alpha = ColorTable[Color].Alpha;
Index++;
LinePtr++;
} else if (m_BitmapHeader.BitCount == 16) {
uint32_t Color = *((uint16_t*) LinePtr);
m_BitmapData[Index].Red = ((Color >> 10) & 0x1f) << 3;
m_BitmapData[Index].Green = ((Color >> 5) & 0x1f) << 3;
m_BitmapData[Index].Blue = (Color & 0x1f) << 3;
m_BitmapData[Index].Alpha = 255;
Index++;
LinePtr += 2;
} else if (m_BitmapHeader.BitCount == 24) {
uint32_t Color = *((uint32_t*) LinePtr);
m_BitmapData[Index].Blue = Color & 0xff;
m_BitmapData[Index].Green = (Color >> 8) & 0xff;
m_BitmapData[Index].Red = (Color >> 16) & 0xff;
m_BitmapData[Index].Alpha = 255;
Index++;
LinePtr += 3;
} else if (m_BitmapHeader.BitCount == 32) {
uint32_t Color = *((uint32_t*) LinePtr);
m_BitmapData[Index].Blue = Color & 0xff;
m_BitmapData[Index].Green = (Color >> 8) & 0xff;
m_BitmapData[Index].Red = (Color >> 16) & 0xff;
m_BitmapData[Index].Alpha = Color >> 24;
Index++;
LinePtr += 4;
}
}
}
} else if (m_BitmapHeader.Compression == 1) { // RLE 8
uint8_t Count = 0;
uint8_t ColorIndex = 0;
int x = 0, y = 0;
while (file.eof() == false) {
file.read((char*) &Count, sizeof(uint8_t));
file.read((char*) &ColorIndex, sizeof(uint8_t));
if (Count > 0) {
Index = x + y * GetWidth();
for (int k = 0; k < Count; k++) {
m_BitmapData[Index + k].Red = ColorTable[ColorIndex].Red;
m_BitmapData[Index + k].Green = ColorTable[ColorIndex].Green;
m_BitmapData[Index + k].Blue = ColorTable[ColorIndex].Blue;
m_BitmapData[Index + k].Alpha = ColorTable[ColorIndex].Alpha;
}
x += Count;
} else if (Count == 0) {
int Flag = ColorIndex;
if (Flag == 0) {
x = 0;
y++;
} else if (Flag == 1) {
break;
} else if (Flag == 2) {
char rx = 0;
char ry = 0;
file.read((char*) &rx, sizeof(char));
file.read((char*) &ry, sizeof(char));
x += rx;
y += ry;
} else {
Count = Flag;
Index = x + y * GetWidth();
for (int k = 0; k < Count; k++) {
file.read((char*) &ColorIndex, sizeof(uint8_t));
m_BitmapData[Index + k].Red = ColorTable[ColorIndex].Red;
m_BitmapData[Index + k].Green = ColorTable[ColorIndex].Green;
m_BitmapData[Index + k].Blue = ColorTable[ColorIndex].Blue;
m_BitmapData[Index + k].Alpha = ColorTable[ColorIndex].Alpha;
}
x += Count;
// Attention: Current Microsoft STL implementation seems to be buggy, tellg() always returns 0.
if (file.tellg() & 1) {
file.seekg(1, std::ios::cur);
}
}
}
}
} else if (m_BitmapHeader.Compression == 2) { // RLE 4
/* RLE 4 is not supported */
Result = false;
} else if (m_BitmapHeader.Compression == 3) { // BITFIELDS
/* We assumes that mask of each color component can be in any order */
uint32_t BitCountRed = CColor::BitCountByMask(m_BitmapHeader.RedMask);
uint32_t BitCountGreen = CColor::BitCountByMask(m_BitmapHeader.GreenMask);
uint32_t BitCountBlue = CColor::BitCountByMask(m_BitmapHeader.BlueMask);
uint32_t BitCountAlpha = CColor::BitCountByMask(m_BitmapHeader.AlphaMask);
for (unsigned int i = 0; i < GetHeight(); i++) {
file.read((char*) Line, LineWidth);
uint8_t *LinePtr = Line;
for (unsigned int j = 0; j < GetWidth(); j++) {
uint32_t Color = 0;
if (m_BitmapHeader.BitCount == 16) {
Color = *((uint16_t*) LinePtr);
LinePtr += 2;
} else if (m_BitmapHeader.BitCount == 32) {
Color = *((uint32_t*) LinePtr);
LinePtr += 4;
} else {
// Other formats are not valid
}
m_BitmapData[Index].Red = CColor::Convert(CColor::ComponentByMask(Color, m_BitmapHeader.RedMask), BitCountRed, 8);
m_BitmapData[Index].Green = CColor::Convert(CColor::ComponentByMask(Color, m_BitmapHeader.GreenMask), BitCountGreen, 8);
m_BitmapData[Index].Blue = CColor::Convert(CColor::ComponentByMask(Color, m_BitmapHeader.BlueMask), BitCountBlue, 8);
m_BitmapData[Index].Alpha = CColor::Convert(CColor::ComponentByMask(Color, m_BitmapHeader.AlphaMask), BitCountAlpha, 8);
Index++;
}
}
}
delete [] ColorTable;
delete [] Line;
file.close();
return Result;
}
bool Save(const char* Filename, unsigned int BitCount = 32) {
bool Result = true;
std::ofstream file(Filename, std::ios::out | std::ios::binary);
if (file.is_open() == false) {
return false;
}
BITMAP_FILEHEADER bfh;
BITMAP_HEADER bh;
memset(&bfh, 0, sizeof(bfh));
memset(&bh, 0, sizeof(bh));
bfh.Signature = BITMAP_SIGNATURE;
bfh.BitsOffset = BITMAP_FILEHEADER_SIZE + sizeof(BITMAP_HEADER);
bfh.Size = (GetWidth() * GetHeight() * BitCount) / 8 + bfh.BitsOffset;
bh.HeaderSize = sizeof(BITMAP_HEADER);
bh.BitCount = BitCount;
if (BitCount == 32) {
bh.Compression = 3; // BITFIELD
bh.AlphaMask = 0xff000000;
bh.BlueMask = 0x00ff0000;
bh.GreenMask = 0x0000ff00;
bh.RedMask = 0x000000ff;
} else if (BitCount == 16) {
bh.Compression = 3; // BITFIELD
bh.AlphaMask = 0x00000000;
bh.BlueMask = 0x0000001f;
bh.GreenMask = 0x000007E0;
bh.RedMask = 0x0000F800;
} else {
bh.Compression = 0; // RGB
}
unsigned int LineWidth = (GetWidth() + 3) & ~3;
bh.Planes = 1;
bh.Height = GetHeight();
bh.Width = GetWidth();
bh.SizeImage = (LineWidth * BitCount * GetHeight()) / 8;
bh.PelsPerMeterX = 3780;
bh.PelsPerMeterY = 3780;
if (BitCount == 32) {
file.write((char*) &bfh, sizeof(BITMAP_FILEHEADER));
file.write((char*) &bh, sizeof(BITMAP_HEADER));
file.write((char*) m_BitmapData, bh.SizeImage);
} else if (BitCount < 16) {
uint8_t* Bitmap = new uint8_t[bh.SizeImage];
BGRA *Palette = 0;
unsigned int PaletteSize = 0;
if (GetBitsWithPalette(Bitmap, bh.SizeImage, BitCount, Palette, PaletteSize)) {
bfh.BitsOffset += PaletteSize * sizeof(BGRA);
file.write((char*) &bfh, BITMAP_FILEHEADER_SIZE);
file.write((char*) &bh, sizeof(BITMAP_HEADER));
file.write((char*) Palette, PaletteSize * sizeof(BGRA));
file.write((char*) Bitmap, bh.SizeImage);
}
delete [] Bitmap;
delete [] Palette;
} else {
uint32_t RedMask = 0;
uint32_t GreenMask = 0;
uint32_t BlueMask = 0;
uint32_t AlphaMask = 0;
if (BitCount == 16) {
RedMask = 0x0000F800;
GreenMask = 0x000007E0;
BlueMask = 0x0000001F;
AlphaMask = 0x00000000;
} else if (BitCount == 24) {
RedMask = 0x00FF0000;
GreenMask = 0x0000FF00;
BlueMask = 0x000000FF;
} else {
// Other color formats are not valid
Result = false;
}
if (Result) {
if (GetBits(NULL, bh.SizeImage, RedMask, GreenMask, BlueMask, AlphaMask)) {
uint8_t* Bitmap = new uint8_t[bh.SizeImage];
if (GetBits(Bitmap, bh.SizeImage, RedMask, GreenMask, BlueMask, AlphaMask)) {
file.write((char*) &bfh, sizeof(BITMAP_FILEHEADER));
file.write((char*) &bh, sizeof(BITMAP_HEADER));
file.write((char*) Bitmap, bh.SizeImage);
}
delete [] Bitmap;
}
}
}
file.close();
return Result;
}
unsigned int GetWidth() {
/* Add plausibility test */
// if (abs(m_BitmapHeader.Width) > 8192) {
// m_BitmapHeader.Width = 8192;
// }
return m_BitmapHeader.Width < 0 ? -m_BitmapHeader.Width : m_BitmapHeader.Width;
}
unsigned int GetHeight() {
/* Add plausibility test */
// if (abs(m_BitmapHeader.Height) > 8192) {
// m_BitmapHeader.Height = 8192;
// }
return m_BitmapHeader.Height < 0 ? -m_BitmapHeader.Height : m_BitmapHeader.Height;
}
unsigned int GetBitCount() {
/* Add plausibility test */
// if (m_BitmapHeader.BitCount > 32) {
// m_BitmapHeader.BitCount = 32;
// }
return m_BitmapHeader.BitCount;
}
/* Copies internal RGBA buffer to user specified buffer */
bool GetBits(void* Buffer, unsigned int &Size) {
bool Result = false;
if (Size == 0 || Buffer == 0) {
Size = m_BitmapSize * sizeof(RGBA);
Result = m_BitmapSize != 0;
} else {
memcpy(Buffer, m_BitmapData, Size);
Result = true;
}
return Result;
}
/* Returns internal RGBA buffer */
void* GetBits() {
return m_BitmapData;
}
/* Copies internal RGBA buffer to user specified buffer and converts it into destination
* bit format specified by component masks.
*
* Typical Bitmap color formats (BGR/BGRA):
*
* Masks for 16 bit (5-5-5): ALPHA = 0x00000000, RED = 0x00007C00, GREEN = 0x000003E0, BLUE = 0x0000001F
* Masks for 16 bit (5-6-5): ALPHA = 0x00000000, RED = 0x0000F800, GREEN = 0x000007E0, BLUE = 0x0000001F
* Masks for 24 bit: ALPHA = 0x00000000, RED = 0x00FF0000, GREEN = 0x0000FF00, BLUE = 0x000000FF
* Masks for 32 bit: ALPHA = 0xFF000000, RED = 0x00FF0000, GREEN = 0x0000FF00, BLUE = 0x000000FF
*
* Other color formats (RGB/RGBA):
*
* Masks for 32 bit (RGBA): ALPHA = 0xFF000000, RED = 0x000000FF, GREEN = 0x0000FF00, BLUE = 0x00FF0000
*
* Bit count will be rounded to next 8 bit boundary. If IncludePadding is true, it will be ensured
* that line width is a multiple of 4. padding bytes are included if necessary.
*
* NOTE: systems with big endian byte order may require masks in inversion order.
*/
bool GetBits(void* Buffer, unsigned int &Size, unsigned int RedMask, unsigned int GreenMask, unsigned int BlueMask, unsigned int AlphaMask, bool IncludePadding = true) {
bool Result = false;
uint32_t BitCountRed = CColor::BitCountByMask(RedMask);
uint32_t BitCountGreen = CColor::BitCountByMask(GreenMask);
uint32_t BitCountBlue = CColor::BitCountByMask(BlueMask);
uint32_t BitCountAlpha = CColor::BitCountByMask(AlphaMask);
unsigned int BitCount = (BitCountRed + BitCountGreen + BitCountBlue + BitCountAlpha + 7) & ~7;
if (BitCount > 32) {
return false;
}
unsigned int w = GetWidth();
//unsigned int LineWidth = (w + 3) & ~3;
unsigned int dataBytesPerLine = (w * BitCount + 7) / 8;
unsigned int LineWidth = (dataBytesPerLine + 3) & ~3;
if (Size == 0 || Buffer == 0) {
//Size = (LineWidth * GetHeight() * BitCount) / 8 + sizeof(unsigned int);
Size = (GetWidth() * GetHeight() * BitCount) / 8 + sizeof(unsigned int);
return true;
}
uint8_t* BufferPtr = (uint8_t*) Buffer;
Result = true;
uint32_t BitPosRed = CColor::BitPositionByMask(RedMask);
uint32_t BitPosGreen = CColor::BitPositionByMask(GreenMask);
uint32_t BitPosBlue = CColor::BitPositionByMask(BlueMask);
uint32_t BitPosAlpha = CColor::BitPositionByMask(AlphaMask);
unsigned int j = 0;
for (unsigned int i = 0; i < m_BitmapSize; i++) {
*(uint32_t*) BufferPtr =
(CColor::Convert(m_BitmapData[i].Blue, 8, BitCountBlue) << BitPosBlue) |
(CColor::Convert(m_BitmapData[i].Green, 8, BitCountGreen) << BitPosGreen) |
(CColor::Convert(m_BitmapData[i].Red, 8, BitCountRed) << BitPosRed) |
(CColor::Convert(m_BitmapData[i].Alpha, 8, BitCountAlpha) << BitPosAlpha);
if (IncludePadding) {
j++;
if (j >= w) {
for (unsigned int k = 0; k < LineWidth - dataBytesPerLine; k++) {
BufferPtr += (BitCount >> 3);
}
j = 0;
}
}
BufferPtr += (BitCount >> 3);
}
Size -= sizeof(unsigned int);
return Result;
}
/* See GetBits().
* It creates a corresponding color table (palette) which have to be destroyed by the user after usage.
*
* Supported Bit depths are: 4, 8
*
* Todo: Optimize, use optimized palette, do ditehring (see my dithering class), support padding for 4 bit bitmaps
*/
bool GetBitsWithPalette(void* Buffer, unsigned int &Size, unsigned int BitCount, BGRA* &Palette, unsigned int &PaletteSize, bool OptimalPalette = false, bool IncludePadding = true) {
bool Result = false;
if (BitCount > 16) {
return false;
}
unsigned int w = GetWidth();
unsigned int dataBytesPerLine = (w * BitCount + 7) / 8;
unsigned int LineWidth = (dataBytesPerLine + 3) & ~3;
if (Size == 0 || Buffer == 0) {
Size = (LineWidth * GetHeight() * BitCount) / 8;
return true;
}
if (OptimalPalette) {
PaletteSize = 0;
// Not implemented
} else {
if (BitCount == 1) {
PaletteSize = 2;
// Not implemented: Who need that?
} else if (BitCount == 4) { // 2:2:1
PaletteSize = 16;
Palette = new BGRA[PaletteSize];
for (int r = 0; r < 4; r++) {
for (int g = 0; g < 2; g++) {
for (int b = 0; b < 2; b++) {
Palette[r | g << 2 | b << 3].Red = r ? (r << 6) | 0x3f : 0;
Palette[r | g << 2 | b << 3].Green = g ? (g << 7) | 0x7f : 0;
Palette[r | g << 2 | b << 3].Blue = b ? (b << 7) | 0x7f : 0;
Palette[r | g << 2 | b << 3].Alpha = 0xff;
}
}
}
} else if (BitCount == 8) { // 3:3:2
PaletteSize = 256;
Palette = new BGRA[PaletteSize];
for (int r = 0; r < 8; r++) {
for (int g = 0; g < 8; g++) {
for (int b = 0; b < 4; b++) {
Palette[r | g << 3 | b << 6].Red = r ? (r << 5) | 0x1f : 0;
Palette[r | g << 3 | b << 6].Green = g ? (g << 5) | 0x1f : 0;
Palette[r | g << 3 | b << 6].Blue = b ? (b << 6) | 0x3f : 0;
Palette[r | g << 3 | b << 6].Alpha = 0xff;
}
}
}
} else if (BitCount == 16) { // 5:5:5
// Not implemented
}
}
unsigned int j = 0;
uint8_t* BufferPtr = (uint8_t*) Buffer;
for (unsigned int i = 0; i < m_BitmapSize; i++) {
if (BitCount == 1) {
// Not implemented: Who needs that?
} else if (BitCount == 4) {
*BufferPtr = ((m_BitmapData[i].Red >> 6) | (m_BitmapData[i].Green >> 7) << 2 | (m_BitmapData[i].Blue >> 7) << 3) << 4;
i++;
*BufferPtr |= (m_BitmapData[i].Red >> 6) | (m_BitmapData[i].Green >> 7) << 2 | (m_BitmapData[i].Blue >> 7) << 3;
} else if (BitCount == 8) {
*BufferPtr = (m_BitmapData[i].Red >> 5) | (m_BitmapData[i].Green >> 5) << 3 | (m_BitmapData[i].Blue >> 5) << 6;
} else if (BitCount == 16) {
// Not implemented
}
if (IncludePadding) {
j++;
if (j >= w) {
for (unsigned int k = 0; k < (LineWidth - dataBytesPerLine); k++) {
BufferPtr += BitCount / 8;
}
j = 0;
}
}
BufferPtr++;
}
Result = true;
return Result;
}
/* Set Bitmap Bits. Will be converted to RGBA internally */
bool SetBits(void* Buffer, unsigned int Width, unsigned int Height, unsigned int RedMask, unsigned int GreenMask, unsigned int BlueMask, unsigned int AlphaMask = 0) {
if (Buffer == 0) {
return false;
}
uint8_t *BufferPtr = (uint8_t*) Buffer;
Dispose();
m_BitmapHeader.Width = Width;
m_BitmapHeader.Height = Height;
m_BitmapHeader.BitCount = 32;
m_BitmapHeader.Compression = 3;
m_BitmapSize = GetWidth() * GetHeight();
m_BitmapData = new RGBA[m_BitmapSize];
/* Find bit count by masks (rounded to next 8 bit boundary) */
unsigned int BitCount = (CColor::BitCountByMask(RedMask | GreenMask | BlueMask | AlphaMask) + 7) & ~7;
uint32_t BitCountRed = CColor::BitCountByMask(RedMask);
uint32_t BitCountGreen = CColor::BitCountByMask(GreenMask);
uint32_t BitCountBlue = CColor::BitCountByMask(BlueMask);
uint32_t BitCountAlpha = CColor::BitCountByMask(AlphaMask);
for (unsigned int i = 0; i < m_BitmapSize; i++) {
unsigned int Color = 0;
if (BitCount <= 8) {
Color = *((uint8_t*) BufferPtr);
BufferPtr += 1;
} else if (BitCount <= 16) {
Color = *((uint16_t*) BufferPtr);
BufferPtr += 2;
} else if (BitCount <= 24) {
Color = *((uint32_t*) BufferPtr);
BufferPtr += 3;
} else if (BitCount <= 32) {
Color = *((uint32_t*) BufferPtr);
BufferPtr += 4;
} else {
/* unsupported */
BufferPtr += 1;
}
m_BitmapData[i].Alpha = CColor::Convert(CColor::ComponentByMask(Color, AlphaMask), BitCountAlpha, 8);
m_BitmapData[i].Red = CColor::Convert(CColor::ComponentByMask(Color, RedMask), BitCountRed, 8);
m_BitmapData[i].Green = CColor::Convert(CColor::ComponentByMask(Color, GreenMask), BitCountGreen, 8);
m_BitmapData[i].Blue = CColor::Convert(CColor::ComponentByMask(Color, BlueMask), BitCountBlue, 8);
}
return true;
}
};
#endif