forked from tmj-fstate/maszyna
-
Notifications
You must be signed in to change notification settings - Fork 16
/
Texture.cpp
1088 lines (890 loc) · 33 KB
/
Texture.cpp
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
/*
This Source Code Form is subject to the
terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not
distributed with this file, You can
obtain one at
http://mozilla.org/MPL/2.0/.
*/
/*
MaSzyna EU07 locomotive simulator
Copyright (C) 2001-2004 Marcin Wozniak and others
*/
#include "stdafx.h"
#include "Texture.h"
#include "GL/glew.h"
#include "application.h"
#include "dictionary.h"
#include "Globals.h"
#include "Logs.h"
#include "utilities.h"
#include "sn_utils.h"
#include "utilities.h"
#include "flip-s3tc.h"
#include <png.h>
#define EU07_DEFERRED_TEXTURE_UPLOAD
texture_manager::texture_manager() {
// since index 0 is used to indicate no texture, we put a blank entry in the first texture slot
m_textures.emplace_back( new opengl_texture(), std::chrono::steady_clock::time_point() );
}
// loads texture data from specified file
// TODO: wrap it in a workitem class, for the job system deferred loading
void
opengl_texture::load() {
if( type == "make:" ) {
// for generated texture we delay data creation until texture is bound
// this ensures the script will receive all simulation data it might potentially want
// as any binding will happen after simulation is loaded, initialized and running
// until then we supply data for a tiny 2x2 grey stub
make_stub();
}
else {
WriteLog( "Loading texture data from \"" + name + type + "\"", logtype::texture );
data_state = resource_state::loading;
if( type == ".dds" ) { load_DDS(); }
else if( type == ".tga" ) { load_TGA(); }
else if( type == ".png" ) { load_PNG(); }
else if( type == ".bmp" ) { load_BMP(); }
else if( type == ".tex" ) { load_TEX(); }
else { goto fail; }
}
// data state will be set by called loader, so we're all done here
if( data_state == resource_state::good ) {
has_alpha = (
data_components == GL_RGBA ?
true :
false );
size = data.size() / 1024;
return;
}
fail:
data_state = resource_state::failed;
ErrorLog( "Bad texture: failed to load texture \"" + name + type + "\"" );
// NOTE: temporary workaround for texture assignment errors
id = 0;
return;
}
void opengl_texture::load_PNG()
{
png_image png;
memset(&png, 0, sizeof(png_image));
png.version = PNG_IMAGE_VERSION;
png_image_begin_read_from_file(&png, (name + type).c_str());
if (png.warning_or_error)
{
data_state = resource_state::failed;
ErrorLog(name + " error: " + std::string(png.message));
return;
}
if (png.format & PNG_FORMAT_FLAG_ALPHA)
{
data_format = GL_RGBA;
data_components = GL_RGBA;
png.format = PNG_FORMAT_RGBA;
}
else
{
data_format = GL_RGB;
data_components = GL_RGB;
png.format = PNG_FORMAT_RGB;
}
data_width = png.width;
data_height = png.height;
data.resize(PNG_IMAGE_SIZE(png));
png_image_finish_read(&png, nullptr,
(void*)&data[0], -data_width * PNG_IMAGE_PIXEL_SIZE(png.format), nullptr);
// we're storing texture data internally with bottom-left origin
// so use negative stride
if (png.warning_or_error)
{
data_state = resource_state::failed;
ErrorLog(name + " error: " + std::string(png.message));
return;
}
data_mapcount = 1;
data_state = resource_state::good;
}
void
opengl_texture::make_stub() {
data_width = 2;
data_height = 2;
data.resize( data_width * data_height * 3 );
std::fill( std::begin( data ), std::end( data ), static_cast<char>( 0xc0 ) );
data_mapcount = 1;
data_format = GL_RGB;
data_components = GL_RGB;
data_state = resource_state::good;
}
void
opengl_texture::make_request() {
auto const components { Split( name, '?' ) };
auto *dictionary { new dictionary_source( components.back() ) };
if( dictionary == nullptr ) { return; }
Application.request( { ToLower( components.front() ), dictionary, id } );
}
void
opengl_texture::load_BMP() {
std::ifstream file( name + type, std::ios::binary ); file.unsetf( std::ios::skipws );
BITMAPFILEHEADER header;
file.read( (char *)&header, sizeof( BITMAPFILEHEADER ) );
if( file.eof() ) {
data_state = resource_state::failed;
return;
}
// Read in bitmap information structure
BITMAPINFO info;
unsigned int infosize = header.bfOffBits - sizeof( BITMAPFILEHEADER );
if( infosize > sizeof( info ) ) {
WriteLog( "Warning - BMP header is larger than expected, possible format difference.", logtype::texture );
}
file.read( (char *)&info, std::min( (size_t)infosize, sizeof( info ) ) );
data_width = info.bmiHeader.biWidth;
data_height = info.bmiHeader.biHeight;
if( info.bmiHeader.biCompression != BI_RGB ) {
ErrorLog( "Bad texture: compressed BMP textures aren't supported.", logtype::texture );
data_state = resource_state::failed;
return;
}
unsigned long datasize = info.bmiHeader.biSizeImage;
if( 0 == datasize ) {
// calculate missing info
datasize = ( data_width * info.bmiHeader.biBitCount + 7 ) / 8 * data_height;
}
data.resize( datasize );
file.read( &data[0], datasize );
// we're storing texture data internally with bottom-left origin
// so BMP origin matches, no flipping needed
// fill remaining data info
if( info.bmiHeader.biBitCount == 32 ) {
data_format = GL_BGRA;
data_components = GL_RGBA;
}
else {
data_format = GL_BGR;
data_components = GL_RGB;
}
data_mapcount = 1;
data_state = resource_state::good;
return;
}
DDCOLORKEY opengl_texture::deserialize_ddck(std::istream &s)
{
DDCOLORKEY ddck;
ddck.dwColorSpaceLowValue = sn_utils::ld_uint32(s);
ddck.dwColorSpaceHighValue = sn_utils::ld_uint32(s);
return ddck;
}
DDPIXELFORMAT opengl_texture::deserialize_ddpf(std::istream &s)
{
DDPIXELFORMAT ddpf;
ddpf.dwSize = sn_utils::ld_uint32(s);
ddpf.dwFlags = sn_utils::ld_uint32(s);
ddpf.dwFourCC = sn_utils::ld_uint32(s);
ddpf.dwRGBBitCount = sn_utils::ld_uint32(s);
ddpf.dwRBitMask = sn_utils::ld_uint32(s);
ddpf.dwGBitMask = sn_utils::ld_uint32(s);
ddpf.dwBBitMask = sn_utils::ld_uint32(s);
ddpf.dwRGBAlphaBitMask = sn_utils::ld_uint32(s);
return ddpf;
}
DDSCAPS2 opengl_texture::deserialize_ddscaps(std::istream &s)
{
DDSCAPS2 ddsc;
ddsc.dwCaps = sn_utils::ld_uint32(s);
ddsc.dwCaps2 = sn_utils::ld_uint32(s);
ddsc.dwCaps3 = sn_utils::ld_uint32(s);
ddsc.dwCaps4 = sn_utils::ld_uint32(s);
return ddsc;
}
DDSURFACEDESC2 opengl_texture::deserialize_ddsd(std::istream &s)
{
DDSURFACEDESC2 ddsd;
ddsd.dwSize = sn_utils::ld_uint32(s);
ddsd.dwFlags = sn_utils::ld_uint32(s);
ddsd.dwHeight = sn_utils::ld_uint32(s);
ddsd.dwWidth = sn_utils::ld_uint32(s);
ddsd.lPitch = sn_utils::ld_uint32(s);
ddsd.dwBackBufferCount = sn_utils::ld_uint32(s);
ddsd.dwMipMapCount = sn_utils::ld_uint32(s);
ddsd.dwAlphaBitDepth = sn_utils::ld_uint32(s);
ddsd.dwReserved = sn_utils::ld_uint32(s);
sn_utils::ld_uint32(s);
ddsd.lpSurface = nullptr;
ddsd.ddckCKDestOverlay = deserialize_ddck(s);
ddsd.ddckCKDestBlt = deserialize_ddck(s);
ddsd.ddckCKSrcOverlay = deserialize_ddck(s);
ddsd.ddckCKSrcBlt = deserialize_ddck(s);
ddsd.ddpfPixelFormat = deserialize_ddpf(s);
ddsd.ddsCaps = deserialize_ddscaps(s);
ddsd.dwTextureStage = sn_utils::ld_uint32(s);
return ddsd;
}
void
opengl_texture::load_DDS() {
std::ifstream file( name + type, std::ios::binary | std::ios::ate ); file.unsetf( std::ios::skipws );
std::size_t filesize = static_cast<size_t>(file.tellg()); // ios::ate already positioned us at the end of the file
file.seekg( 0, std::ios::beg ); // rewind the caret afterwards
char filecode[5];
file.read(filecode, 4);
filesize -= 4;
filecode[4] = 0;
if( filecode != std::string( "DDS " ) )
{
data_state = resource_state::failed;
return;
}
DDSURFACEDESC2 ddsd = deserialize_ddsd(file);
filesize -= 124;
//
// This .dds loader supports the loading of compressed formats DXT1, DXT3
// and DXT5.
//
switch (ddsd.ddpfPixelFormat.dwFourCC)
{
case FOURCC_DXT1:
// DXT1's compression ratio is 8:1
data_format = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
break;
case FOURCC_DXT3:
// DXT3's compression ratio is 4:1
data_format = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
break;
case FOURCC_DXT5:
// DXT5's compression ratio is 4:1
data_format = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
break;
default:
data_state = resource_state::failed;
return;
}
data_width = ddsd.dwWidth;
data_height = ddsd.dwHeight;
data_mapcount = ddsd.dwMipMapCount;
int blockSize = ( data_format == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT ? 8 : 16 );
int offset = 0;
while( ( data_width > Global.iMaxTextureSize ) || ( data_height > Global.iMaxTextureSize ) ) {
// pomijanie zbyt dużych mipmap, jeśli wymagane jest ograniczenie rozmiaru
offset += ( ( data_width + 3 ) / 4 ) * ( ( data_height + 3 ) / 4 ) * blockSize;
data_width /= 2;
data_height /= 2;
--data_mapcount;
WriteLog( "Texture pixelcount exceeds specified limits, skipping mipmap level" );
};
if( data_mapcount <= 0 ) {
// there's a chance we've discarded the provided mipmap(s) as too large
WriteLog( "Texture \"" + name + "\" has no mipmaps which can fit currently set texture pixelcount limits." );
data_state = resource_state::failed;
return;
}
size_t datasize = filesize - offset;
if( datasize == 0 ) {
// catch malformed .dds files
WriteLog( "Bad texture: file \"" + name + "\" is malformed and holds no texture data.", logtype::texture );
data_state = resource_state::failed;
return;
}
// reserve space and load texture data
data.resize( datasize );
if( offset != 0 ) {
// skip data for mipmaps we don't need
file.seekg( offset, std::ios_base::cur );
filesize -= offset;
}
file.read((char *)&data[0], datasize);
filesize -= datasize;
// we're storing texture data internally with bottom-left origin,
// while DDS stores it with top-left origin. we need to flip it.
if (Global.dds_upper_origin)
{
char *mipmap = (char*)&data[0];
int mapcount = data_mapcount,
width = data_width,
height = data_height;
while (mapcount)
{
if (ddsd.ddpfPixelFormat.dwFourCC == FOURCC_DXT1)
flip_s3tc::flip_dxt1_image(mipmap, width, height);
else if (ddsd.ddpfPixelFormat.dwFourCC == FOURCC_DXT3)
flip_s3tc::flip_dxt23_image(mipmap, width, height);
else if (ddsd.ddpfPixelFormat.dwFourCC == FOURCC_DXT5)
flip_s3tc::flip_dxt45_image(mipmap, width, height);
mipmap += ( ( width + 3 ) / 4 ) * ( ( height + 3 ) / 4 ) * blockSize;
width = std::max( width / 2, 4 );
height = std::max( height / 2, 4 );
--mapcount;
}
}
data_components =
( ddsd.ddpfPixelFormat.dwFourCC == FOURCC_DXT1 ?
GL_RGB :
GL_RGBA );
data_state = resource_state::good;
return;
}
void
opengl_texture::load_TEX() {
std::ifstream file( name + type, std::ios::binary ); file.unsetf( std::ios::skipws );
char head[ 5 ];
file.read( head, 4 );
head[ 4 ] = 0;
bool hasalpha;
if( std::string( "RGB " ) == head ) {
hasalpha = false;
}
else if( std::string( "RGBA" ) == head ) {
hasalpha = true;
}
else {
ErrorLog( "Bad texture: unrecognized TEX texture sub-format: " + std::string(head), logtype::texture );
data_state = resource_state::failed;
return;
};
file.read( (char *)&data_width, sizeof( int ) );
file.read( (char *)&data_height, sizeof( int ) );
std::size_t datasize = data_width * data_height * ( hasalpha ? 4 : 3 );
data.resize( datasize );
file.read( reinterpret_cast<char *>( &data[0] ), datasize );
// fill remaining data info
if( true == hasalpha ) {
data_format = GL_RGBA;
data_components = GL_RGBA;
}
else {
data_format = GL_RGB;
data_components = GL_RGB;
}
data_mapcount = 1;
data_state = resource_state::good;
return;
}
void
opengl_texture::load_TGA() {
std::ifstream file( name + type, std::ios::binary ); file.unsetf( std::ios::skipws );
// Read the header of the TGA, compare it with the known headers for compressed and uncompressed TGAs
unsigned char tgaheader[ 18 ];
file.read( (char *)tgaheader, sizeof( unsigned char ) * 18 );
while( tgaheader[ 0 ] > 0 ) {
--tgaheader[ 0 ];
unsigned char temp;
file.read( (char *)&temp, sizeof( unsigned char ) );
}
data_width = tgaheader[ 13 ] * 256 + tgaheader[ 12 ];
data_height = tgaheader[ 15 ] * 256 + tgaheader[ 14 ];
int const bytesperpixel = tgaheader[ 16 ] / 8;
// check whether width, height an BitsPerPixel are valid
if( ( data_width <= 0 )
|| ( data_height <= 0 )
|| ( ( bytesperpixel != 1 ) && ( bytesperpixel != 3 ) && ( bytesperpixel != 4 ) ) ) {
data_state = resource_state::failed;
return;
}
// allocate the data buffer
int const datasize = data_width * data_height * 4;
data.resize(datasize);
// call the appropriate loader-routine
if( tgaheader[ 2 ] == 2 ) {
// uncompressed TGA
if( bytesperpixel == 4 ) {
// read the data directly
file.read( reinterpret_cast<char*>( &data[0] ), datasize );
}
else {
// rgb or greyscale image, expand to bgra
unsigned char buffer[ 4 ] = { 255, 255, 255, 255 }; // alpha channel will be white
unsigned int *datapointer = (unsigned int*)&data[0];
unsigned int *bufferpointer = (unsigned int*)&buffer[ 0 ];
int const pixelcount = data_width * data_height;
for( int i = 0; i < pixelcount; ++i ) {
file.read( (char *)&buffer[ 0 ], sizeof( unsigned char ) * bytesperpixel );
if( bytesperpixel == 1 ) {
// expand greyscale data
buffer[ 1 ] = buffer[ 0 ];
buffer[ 2 ] = buffer[ 0 ];
}
// copy all four values in one operation
( *datapointer ) = ( *bufferpointer );
++datapointer;
}
}
}
else if( tgaheader[ 2 ] == 10 ) {
// compressed TGA
int currentpixel = 0;
unsigned char buffer[ 4 ] = { 255, 255, 255, 255 };
const int pixelcount = data_width * data_height;
unsigned int *datapointer = (unsigned int *)&data[0];
unsigned int *bufferpointer = (unsigned int *)&buffer[ 0 ];
do {
unsigned char chunkheader = 0;
file.read( (char *)&chunkheader, sizeof( unsigned char ) );
if( (chunkheader & 0x80 ) == 0 ) {
// if the high bit is not set, it means it is the number of RAW color packets, plus 1
for( int i = 0; i <= chunkheader; ++i ) {
file.read( (char *)&buffer[ 0 ], bytesperpixel );
if( bytesperpixel == 1 ) {
// expand greyscale data
buffer[ 1 ] = buffer[ 0 ];
buffer[ 2 ] = buffer[ 0 ];
}
// copy all four values in one operation
( *datapointer ) = ( *bufferpointer );
++datapointer;
++currentpixel;
}
}
else {
// rle chunk, the color supplied afterwards is reapeated header + 1 times (not including the highest bit)
chunkheader &= ~0x80;
// read the current color
file.read( (char *)&buffer[ 0 ], bytesperpixel );
if( bytesperpixel == 1 ) {
// expand greyscale data
buffer[ 1 ] = buffer[ 0 ];
buffer[ 2 ] = buffer[ 0 ];
}
// copy the color into the image data as many times as dictated
for( int i = 0; i <= chunkheader; ++i ) {
( *datapointer ) = ( *bufferpointer );
++datapointer;
++currentpixel;
}
}
} while( currentpixel < pixelcount );
}
else {
// unrecognized TGA sub-type
data_state = resource_state::failed;
return;
}
if( ( tgaheader[ 17 ] & 0x20 ) != 0 ) {
// normally origin is bottom-left
// if byte 17 bit 5 is set, it is top-left and needs flip
flip_vertical();
}
downsize( GL_BGRA );
if( ( data_width > Global.iMaxTextureSize ) || ( data_height > Global.iMaxTextureSize ) ) {
// for non-square textures there's currently possibility the scaling routine will have to abort
// before it gets all work done
data_state = resource_state::failed;
return;
}
// TODO: add horizontal/vertical data flip, based on the descriptor (18th) header byte
// fill remaining data info
data_mapcount = 1;
data_format = GL_BGRA;
data_components =
( bytesperpixel == 4 ?
GL_RGBA :
GL_RGB );
data_state = resource_state::good;
return;
}
bool
opengl_texture::bind() {
if( ( false == is_ready )
&& ( false == create() ) ) {
return false;
}
::glBindTexture( GL_TEXTURE_2D, id );
return true;
}
bool
opengl_texture::create() {
if( data_state != resource_state::good ) {
// don't bother until we have useful texture data
return false;
}
// TODO: consider creating and storing low-res version of the texture if it's ever unloaded from the gfx card,
// as a placeholder until it can be loaded again
if( id == -1 ) {
::glGenTextures( 1, &id );
::glBindTexture( GL_TEXTURE_2D, id );
// analyze specified texture traits
bool wraps{ true };
bool wrapt{ true };
for( auto const &trait : traits ) {
switch( trait ) {
case 's': { wraps = false; break; }
case 't': { wrapt = false; break; }
}
}
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, ( wraps == true ? GL_REPEAT : GL_CLAMP_TO_EDGE ) );
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, ( wrapt == true ? GL_REPEAT : GL_CLAMP_TO_EDGE ) );
set_filtering();
if( data_mapcount == 1 ) {
// fill missing mipmaps if needed
::glTexParameteri( GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE );
}
// upload texture data
int dataoffset = 0,
datasize = 0,
datawidth = data_width,
dataheight = data_height;
for( int maplevel = 0; maplevel < data_mapcount; ++maplevel ) {
if( ( data_format == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT )
|| ( data_format == GL_COMPRESSED_RGBA_S3TC_DXT3_EXT )
|| ( data_format == GL_COMPRESSED_RGBA_S3TC_DXT5_EXT ) ) {
// compressed dds formats
int const datablocksize =
( data_format == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT ?
8 :
16 );
datasize = ( ( std::max( datawidth, 4 ) + 3 ) / 4 ) * ( ( std::max( dataheight, 4 ) + 3 ) / 4 ) * datablocksize;
::glCompressedTexImage2D(
GL_TEXTURE_2D, maplevel, data_format,
datawidth, dataheight, 0,
datasize, (GLubyte *)&data[ dataoffset ] );
dataoffset += datasize;
datawidth = std::max( datawidth / 2, 1 );
dataheight = std::max( dataheight / 2, 1 );
}
else {
// uncompressed texture data. have the gfx card do the compression as it sees fit
::glTexImage2D(
GL_TEXTURE_2D, 0,
Global.compress_tex ? GL_COMPRESSED_RGBA : GL_RGBA,
data_width, data_height, 0,
data_format, GL_UNSIGNED_BYTE, (GLubyte *)&data[ 0 ] );
}
}
if( ( true == Global.ResourceMove )
|| ( false == Global.ResourceSweep ) ) {
// if garbage collection is disabled we don't expect having to upload the texture more than once
data = std::vector<char>();
data_state = resource_state::none;
}
if( type == "make:" ) {
// for generated textures send a request to have the actual content of the texture generated
make_request();
}
is_ready = true;
}
return true;
}
// releases resources allocated on the opengl end, storing local copy if requested
void
opengl_texture::release() {
if( id == -1 ) { return; }
if( true == Global.ResourceMove ) {
// if resource move is enabled we don't keep a cpu side copy after upload
// so need to re-acquire the data before release
// TBD, TODO: instead of vram-ram transfer fetch the data 'normally' from the disk using worker thread
if( type == "make:" ) {
// auto generated textures only store a stub
make_stub();
}
else {
::glBindTexture( GL_TEXTURE_2D, id );
GLint datasize{};
GLint iscompressed{};
::glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED, &iscompressed );
if( iscompressed == GL_TRUE ) {
// texture is compressed on the gpu side
// query texture details needed to perform the backup...
::glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &data_format );
::glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED_IMAGE_SIZE, &datasize );
data.resize( datasize );
// ...fetch the data...
::glGetCompressedTexImage( GL_TEXTURE_2D, 0, &data[ 0 ] );
}
else {
// for whatever reason texture didn't get compressed during upload
// fallback on plain rgba storage...
data_format = GL_RGBA;
data.resize( data_width * data_height * 4 );
// ...fetch the data...
::glGetTexImage( GL_TEXTURE_2D, 0, data_format, GL_UNSIGNED_BYTE, &data[ 0 ] );
}
// ...and update texture object state
data_mapcount = 1; // we keep copy of only top mipmap level
data_state = resource_state::good;
}
}
// release opengl resources
::glDeleteTextures( 1, &id );
id = -1;
is_ready = false;
return;
}
void
opengl_texture::set_filtering() const {
// default texture mode
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR );
if( GLEW_EXT_texture_filter_anisotropic ) {
// anisotropic filtering
::glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, Global.AnisotropicFiltering );
}
bool sharpen{ false };
for( auto const &trait : traits ) {
switch( trait ) {
case '#': { sharpen = true; break; }
default: { break; }
}
}
if( true == sharpen ) {
// #: sharpen more
::glTexEnvf( GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS, -2.0 );
}
else {
// regular texture sharpening
::glTexEnvf( GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS, -1.0 );
}
}
void
opengl_texture::downsize( GLuint const Format ) {
while( ( data_width > Global.iMaxTextureSize ) || ( data_height > Global.iMaxTextureSize ) ) {
// scale down the base texture, if it's larger than allowed maximum
// NOTE: scaling is uniform along both axes, meaning non-square textures can drop below the maximum
// TODO: replace with proper scaling function once we have image middleware in place
if( ( data_width < 2 ) || ( data_height < 2 ) ) {
// can't go any smaller
break;
}
WriteLog( "Texture pixelcount exceeds specified limits, downsampling data" );
// trim potential odd texture sizes
data_width -= ( data_width % 2 );
data_height -= ( data_height % 2 );
switch( Format ) {
case GL_RGB: { downsample< glm::tvec3<std::uint8_t> >( data_width, data_height, data.data() ); break; }
case GL_BGRA:
case GL_RGBA: { downsample< glm::tvec4<std::uint8_t> >( data_width, data_height, data.data() ); break; }
default: { break; }
}
data_width /= 2;
data_height /= 2;
data.resize( data.size() / 4 ); // not strictly needed, but, eh
};
}
void
opengl_texture::flip_vertical() {
auto const swapsize { data_width * 4 };
auto destination { data.begin() + ( data_height - 1 ) * swapsize };
auto sampler { data.begin() };
for( auto row = 0; row < data_height / 2; ++row ) {
std::swap_ranges( sampler, sampler + swapsize, destination );
sampler += swapsize;
destination -= swapsize;
}
}
void
texture_manager::assign_units( GLint const Helper, GLint const Shadows, GLint const Normals, GLint const Diffuse ) {
m_units[ 0 ].unit = Helper;
m_units[ 1 ].unit = Shadows;
m_units[ 2 ].unit = Normals;
m_units[ 3 ].unit = Diffuse;
}
void
texture_manager::unit( GLint const Textureunit ) {
if( m_activeunit == Textureunit ) { return; }
m_activeunit = Textureunit;
::glActiveTexture( Textureunit );
}
// ustalenie numeru tekstury, wczytanie jeśli jeszcze takiej nie było
texture_handle
texture_manager::create( std::string Filename, bool const Loadnow ) {
if( Filename.find( '|' ) != std::string::npos )
Filename.erase( Filename.find( '|' ) ); // po | może być nazwa kolejnej tekstury
std::pair<std::string, std::string> locator; // resource name, resource type
std::string traits;
// discern textures generated by a script
// TBD: support file: for file resources?
auto const isgenerated { Filename.find( "make:" ) == 0 };
// process supplied resource name
if( isgenerated ) {
// generated resource
// scheme:(user@)path?query
// remove scheme indicator
Filename.erase( 0, Filename.find( ':' ) + 1 );
// TODO: extract traits specification from the query
// clean up slashes
erase_leading_slashes( Filename );
}
else {
// regular file resource
// (filepath/)(#)filename.extension(:traits)
// extract trait specifications
auto const traitpos = Filename.rfind( ':' );
if( traitpos != std::string::npos ) {
// po dwukropku mogą być podane dodatkowe informacje niebędące nazwą tekstury
if( Filename.size() > traitpos + 1 ) {
traits = Filename.substr( traitpos + 1 );
}
Filename.erase( traitpos );
}
// potentially trim file type indicator since we check for multiple types
erase_extension( Filename );
// clean up slashes
erase_leading_slashes( Filename );
// temporary code for legacy assets -- textures with names beginning with # are to be sharpened
if( ( Filename[ 0 ] == '#' )
|| ( Filename.find( "/#" ) != std::string::npos ) ) {
traits += '#';
}
}
// try to locate requested texture in the databank
// TBD, TODO: include trait specification in the resource id in the databank?
auto const lookup { find_in_databank( Filename ) };
if( lookup != npos ) {
return lookup;
}
// if the lookup fails...
if( isgenerated ) {
// TODO: verify presence of the generator script
locator.first = Filename;
locator.second = "make:";
}
else {
// ...for file resources check if it's on disk
locator = find_on_disk( Filename );
if( true == locator.first.empty() ) {
// there's nothing matching in the databank nor on the disk, report failure
ErrorLog( "Bad file: failed do locate texture file \"" + Filename + "\"", logtype::file );
return npos;
}
}
auto texture = new opengl_texture();
texture->name = locator.first;
texture->type = locator.second;
texture->traits = traits;
auto const textureindex = (texture_handle)m_textures.size();
m_textures.emplace_back( texture, std::chrono::steady_clock::time_point() );
m_texturemappings.emplace( locator.first, textureindex );
WriteLog( "Created texture object for \"" + locator.first + "\"", logtype::texture );
if( true == Loadnow ) {
texture_manager::texture( textureindex ).load();
#ifndef EU07_DEFERRED_TEXTURE_UPLOAD
texture_manager::texture( textureindex ).create();
// texture creation binds a different texture, force a re-bind on next use
m_activetexture = -1;
#endif
}
return textureindex;
};
void
texture_manager::bind( std::size_t const Unit, texture_handle const Texture ) {
m_textures[ Texture ].second = m_garbagecollector.timestamp();
if( m_units[ Unit ].unit == 0 ) {
// no texture unit, nothing to bind the texture to
return;
}
// even if we may skip texture binding make sure the relevant texture unit is activated
unit( m_units[ Unit ].unit );
if( Texture == m_units[ Unit ].texture ) {
// don't bind again what's already active
return;
}
// TBD, TODO: do binding in texture object, add support for other types than 2d
if( Texture != null_handle ) {
#ifndef EU07_DEFERRED_TEXTURE_UPLOAD
// NOTE: we could bind dedicated 'error' texture here if the id isn't valid
::glBindTexture( GL_TEXTURE_2D, texture(Texture).id );
m_units[ Unit ].texture = Texture;
#else
if( true == texture( Texture ).bind() ) {
m_units[ Unit ].texture = Texture;
}
else {
// TODO: bind a special 'error' texture on failure
::glBindTexture( GL_TEXTURE_2D, 0 );
m_units[ Unit ].texture = 0;
}
#endif
}
else {
::glBindTexture( GL_TEXTURE_2D, 0 );
m_units[ Unit ].texture = 0;
}
// all done
return;
}
void
texture_manager::delete_textures() {
for( auto const &texture : m_textures ) {
// usunięcie wszyskich tekstur (bez usuwania struktury)
if( ( texture.first->id > 0 )
&& ( texture.first->id != -1 ) ) {
::glDeleteTextures( 1, &(texture.first->id) );
}
delete texture.first;
}
}
// performs a resource sweep
void
texture_manager::update() {
if( m_garbagecollector.sweep() > 0 ) {
for( auto &unit : m_units ) {
unit.texture = -1;
}