radiant/textures.cpp

   1 /*
   2    Copyright (C) 1999-2006 Id Software, Inc. and contributors.
   3    For a list of contributors, see the accompanying CONTRIBUTORS file.
   4
   5    This file is part of GtkRadiant.
   6
   7    GtkRadiant is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    GtkRadiant is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GtkRadiant; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  20  */
  21
  22 #include "textures.h"
  23
  24 #include "debugging/debugging.h"
  25 #include "warnings.h"
  26
  27 #include "itextures.h"
  28 #include "igl.h"
  29 #include "preferencesystem.h"
  30 #include "qgl.h"
  31
  32 #include "texturelib.h"
  33 #include "container/hashfunc.h"
  34 #include "container/cache.h"
  35 #include "generic/callback.h"
  36 #include "stringio.h"
  37
  38 #include "image.h"
  39 #include "texmanip.h"
  40 #include "preferences.h"
  41
  42
  43
  44 enum ETexturesMode
  45 {
  46         eTextures_NEAREST = 0,
  47         eTextures_NEAREST_MIPMAP_NEAREST = 1,
  48         eTextures_NEAREST_MIPMAP_LINEAR = 2,
  49         eTextures_LINEAR = 3,
  50         eTextures_LINEAR_MIPMAP_NEAREST = 4,
  51         eTextures_LINEAR_MIPMAP_LINEAR = 5,
  52         eTextures_MAX_ANISOTROPY = 6,
  53 };
  54
  55 enum TextureCompressionFormat
  56 {
  57         TEXTURECOMPRESSION_NONE = 0,
  58         TEXTURECOMPRESSION_RGBA = 1,
  59         TEXTURECOMPRESSION_RGBA_S3TC_DXT1 = 2,
  60         TEXTURECOMPRESSION_RGBA_S3TC_DXT3 = 3,
  61         TEXTURECOMPRESSION_RGBA_S3TC_DXT5 = 4,
  62 };
  63
  64 struct texture_globals_t
  65 {
  66         // RIANT
  67         // texture compression format
  68         TextureCompressionFormat m_nTextureCompressionFormat;
  69
  70         float fGamma;
  71
  72         bool bTextureCompressionSupported; // is texture compression supported by hardware?
  73         GLint texture_components;
  74
  75         // temporary values that should be initialised only once at run-time
  76         bool m_bOpenGLCompressionSupported;
  77         bool m_bS3CompressionSupported;
  78
  79         texture_globals_t( GLint components ) :
  80                 m_nTextureCompressionFormat( TEXTURECOMPRESSION_NONE ),
  81                 fGamma( 1.0f ),
  82                 bTextureCompressionSupported( false ),
  83                 texture_components( components ),
  84                 m_bOpenGLCompressionSupported( false ),
  85                 m_bS3CompressionSupported( false ){
  86         }
  87 };
  88
  89 texture_globals_t g_texture_globals( GL_RGBA );
  90
  91 void SetTexParameters( ETexturesMode mode ){
  92         float maxAniso = QGL_maxTextureAnisotropy();
  93         if ( maxAniso > 1 ) {
  94                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, 1.0f );
  95         }
  96         else
  97         if ( mode == eTextures_MAX_ANISOTROPY ) {
  98                 mode = eTextures_LINEAR_MIPMAP_LINEAR;
  99         }
 100
 101         switch ( mode )
 102         {
 103         case eTextures_NEAREST:
 104                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
 105                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
 106                 break;
 107         case eTextures_NEAREST_MIPMAP_NEAREST:
 108                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST );
 109                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
 110                 break;
 111         case eTextures_NEAREST_MIPMAP_LINEAR:
 112                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_LINEAR );
 113                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
 114                 break;
 115         case eTextures_LINEAR:
 116                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 117                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 118                 break;
 119         case eTextures_LINEAR_MIPMAP_NEAREST:
 120                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST );
 121                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 122                 break;
 123         case eTextures_LINEAR_MIPMAP_LINEAR:
 124                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR );
 125                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 126                 break;
 127         case eTextures_MAX_ANISOTROPY:
 128                 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, maxAniso );
 129                 break;
 130         default:
 131                 globalOutputStream() << "invalid texture mode\n";
 132         }
 133 }
 134
 135 ETexturesMode g_texture_mode = eTextures_LINEAR_MIPMAP_LINEAR;
 136
 137
 138
 139
 140 byte g_gammatable[256];
 141 void ResampleGamma( float fGamma ){
 142         int i,inf;
 143         if ( fGamma == 1.0 ) {
 144                 for ( i = 0; i < 256; i++ )
 145                         g_gammatable[i] = i;
 146         }
 147         else
 148         {
 149                 for ( i = 0; i < 256; i++ )
 150                 {
 151                         inf = (int)( 255 * pow( static_cast<double>( ( i + 0.5 ) / 255.5 ), static_cast<double>( fGamma ) ) + 0.5 );
 152                         if ( inf < 0 ) {
 153                                 inf = 0;
 154                         }
 155                         if ( inf > 255 ) {
 156                                 inf = 255;
 157                         }
 158                         g_gammatable[i] = inf;
 159                 }
 160         }
 161 }
 162
 163 inline const int& min_int( const int& left, const int& right ){
 164         return std::min( left, right );
 165 }
 166
 167 int max_tex_size = 0;
 168 const int max_texture_quality = 3;
 169 LatchedValue<int> g_Textures_textureQuality( 3, "Texture Quality" );
 170
 171 /// \brief This function does the actual processing of raw RGBA data into a GL texture.
 172 /// It will also resample to power-of-two dimensions, generate the mipmaps and adjust gamma.
 173 void LoadTextureRGBA( qtexture_t* q, unsigned char* pPixels, int nWidth, int nHeight ){
 174         static float fGamma = -1;
 175         float total[3];
 176         byte  *outpixels = 0;
 177         int nCount = nWidth * nHeight;
 178
 179         if ( fGamma != g_texture_globals.fGamma ) {
 180                 fGamma = g_texture_globals.fGamma;
 181                 ResampleGamma( fGamma );
 182         }
 183
 184         q->width = nWidth;
 185         q->height = nHeight;
 186
 187         total[0] = total[1] = total[2] = 0.0f;
 188
 189         // resample texture gamma according to user settings
 190         for ( int i = 0; i < ( nCount * 4 ); i += 4 )
 191         {
 192                 for ( int j = 0; j < 3; j++ )
 193                 {
 194                         total[j] += ( pPixels + i )[j];
 195                         byte b = ( pPixels + i )[j];
 196                         ( pPixels + i )[j] = g_gammatable[b];
 197                 }
 198         }
 199
 200         q->color[0] = total[0] / ( nCount * 255 );
 201         q->color[1] = total[1] / ( nCount * 255 );
 202         q->color[2] = total[2] / ( nCount * 255 );
 203
 204         glGenTextures( 1, &q->texture_number );
 205
 206         glBindTexture( GL_TEXTURE_2D, q->texture_number );
 207
 208         SetTexParameters( g_texture_mode );
 209
 210         int gl_width = 1;
 211         while ( gl_width < nWidth )
 212                 gl_width <<= 1;
 213
 214         int gl_height = 1;
 215         while ( gl_height < nHeight )
 216                 gl_height <<= 1;
 217
 218         bool resampled = false;
 219         if ( !( gl_width == nWidth && gl_height == nHeight ) ) {
 220                 resampled = true;
 221                 outpixels = (byte *)malloc( gl_width * gl_height * 4 );
 222                 R_ResampleTexture( pPixels, nWidth, nHeight, outpixels, gl_width, gl_height, 4 );
 223         }
 224         else
 225         {
 226                 outpixels = pPixels;
 227         }
 228
 229         int quality_reduction = max_texture_quality - g_Textures_textureQuality.m_value;
 230         int target_width = min_int( gl_width >> quality_reduction, max_tex_size );
 231         int target_height = min_int( gl_height >> quality_reduction, max_tex_size );
 232
 233         while ( gl_width > target_width || gl_height > target_height )
 234         {
 235                 GL_MipReduce( outpixels, outpixels, gl_width, gl_height, target_width, target_height );
 236
 237                 if ( gl_width > target_width ) {
 238                         gl_width >>= 1;
 239                 }
 240                 if ( gl_height > target_height ) {
 241                         gl_height >>= 1;
 242                 }
 243         }
 244
 245         int mip = 0;
 246         glTexImage2D( GL_TEXTURE_2D, mip++, g_texture_globals.texture_components, gl_width, gl_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, outpixels );
 247         while ( gl_width > 1 || gl_height > 1 )
 248         {
 249                 GL_MipReduce( outpixels, outpixels, gl_width, gl_height, 1, 1 );
 250
 251                 if ( gl_width > 1 ) {
 252                         gl_width >>= 1;
 253                 }
 254                 if ( gl_height > 1 ) {
 255                         gl_height >>= 1;
 256                 }
 257
 258                 glTexImage2D( GL_TEXTURE_2D, mip++, g_texture_globals.texture_components, gl_width, gl_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, outpixels );
 259         }
 260
 261         glBindTexture( GL_TEXTURE_2D, 0 );
 262         if ( resampled ) {
 263                 free( outpixels );
 264         }
 265 }
 266
 267 #if 0
 268 /*
 269    ==============
 270    Texture_InitPalette
 271    ==============
 272  */
 273 void Texture_InitPalette( byte *pal ){
 274         int r,g,b;
 275         int i;
 276         int inf;
 277         byte gammatable[256];
 278         float gamma;
 279
 280         gamma = g_texture_globals.fGamma;
 281
 282         if ( gamma == 1.0 ) {
 283                 for ( i = 0 ; i < 256 ; i++ )
 284                         gammatable[i] = i;
 285         }
 286         else
 287         {
 288                 for ( i = 0 ; i < 256 ; i++ )
 289                 {
 290                         inf = (int)( 255 * pow( ( i + 0.5 ) / 255.5, gamma ) + 0.5 );
 291                         if ( inf < 0 ) {
 292                                 inf = 0;
 293                         }
 294                         if ( inf > 255 ) {
 295                                 inf = 255;
 296                         }
 297                         gammatable[i] = inf;
 298                 }
 299         }
 300
 301         for ( i = 0 ; i < 256 ; i++ )
 302         {
 303                 r = gammatable[pal[0]];
 304                 g = gammatable[pal[1]];
 305                 b = gammatable[pal[2]];
 306                 pal += 3;
 307
 308                 //v = (r<<24) + (g<<16) + (b<<8) + 255;
 309                 //v = BigLong (v);
 310
 311                 //tex_palette[i] = v;
 312                 tex_palette[i * 3 + 0] = r;
 313                 tex_palette[i * 3 + 1] = g;
 314                 tex_palette[i * 3 + 2] = b;
 315         }
 316 }
 317 #endif
 318
 319 #if 0
 320 class TestHashtable
 321 {
 322 public:
 323 TestHashtable(){
 324         HashTable<CopiedString, CopiedString, HashStringNoCase, StringEqualNoCase> strings;
 325         strings["Monkey"] = "bleh";
 326         strings["MonkeY"] = "blah";
 327 }
 328 };
 329
 330 const TestHashtable g_testhashtable;
 331
 332 #endif
 333
 334 typedef std::pair<LoadImageCallback, CopiedString> TextureKey;
 335
 336 void qtexture_realise( qtexture_t& texture, const TextureKey& key ){
 337         texture.texture_number = 0;
 338         if ( !string_empty( key.second.c_str() ) ) {
 339                 Image* image = key.first.loadImage( key.second.c_str() );
 340                 if ( image != 0 ) {
 341                         LoadTextureRGBA( &texture, image->getRGBAPixels(), image->getWidth(), image->getHeight() );
 342                         texture.surfaceFlags = image->getSurfaceFlags();
 343                         texture.contentFlags = image->getContentFlags();
 344                         texture.value = image->getValue();
 345                         image->release();
 346                         globalOutputStream() << "Loaded Texture: \"" << key.second.c_str() << "\"\n";
 347                         GlobalOpenGL_debugAssertNoErrors();
 348                 }
 349                 else
 350                 {
 351                         globalErrorStream() << "Texture load failed: \"" << key.second.c_str() << "\"\n";
 352                 }
 353         }
 354 }
 355
 356 void qtexture_unrealise( qtexture_t& texture ){
 357         if ( GlobalOpenGL().contextValid && texture.texture_number != 0 ) {
 358                 glDeleteTextures( 1, &texture.texture_number );
 359                 GlobalOpenGL_debugAssertNoErrors();
 360         }
 361 }
 362
 363 class TextureKeyEqualNoCase
 364 {
 365 public:
 366 bool operator()( const TextureKey& key, const TextureKey& other ) const {
 367         return key.first == other.first && string_equal_nocase( key.second.c_str(), other.second.c_str() );
 368 }
 369 };
 370
 371 class TextureKeyHashNoCase
 372 {
 373 public:
 374 typedef hash_t hash_type;
 375 hash_t operator()( const TextureKey& key ) const {
 376         return hash_combine( string_hash_nocase( key.second.c_str() ), pod_hash( key.first ) );
 377 }
 378 };
 379
 380 #define DEBUG_TEXTURES 0
 381
 382 class TexturesMap : public TexturesCache
 383 {
 384 class TextureConstructor
 385 {
 386 TexturesMap* m_cache;
 387 public:
 388 explicit TextureConstructor( TexturesMap* cache )
 389         : m_cache( cache ){
 390 }
 391 qtexture_t* construct( const TextureKey& key ){
 392         qtexture_t* texture = new qtexture_t( key.first, key.second.c_str() );
 393         if ( m_cache->realised() ) {
 394                 qtexture_realise( *texture, key );
 395         }
 396         return texture;
 397 }
 398 void destroy( qtexture_t* texture ){
 399         if ( m_cache->realised() ) {
 400                 qtexture_unrealise( *texture );
 401         }
 402         delete texture;
 403 }
 404 };
 405
 406 typedef HashedCache<TextureKey, qtexture_t, TextureKeyHashNoCase, TextureKeyEqualNoCase, TextureConstructor> qtextures_t;
 407 qtextures_t m_qtextures;
 408 TexturesCacheObserver* m_observer;
 409 std::size_t m_unrealised;
 410
 411 public:
 412 virtual ~TexturesMap() = default;
 413 TexturesMap() : m_qtextures( TextureConstructor( this ) ), m_observer( 0 ), m_unrealised( 1 ){
 414 }
 415 typedef qtextures_t::iterator iterator;
 416
 417 iterator begin(){
 418         return m_qtextures.begin();
 419 }
 420 iterator end(){
 421         return m_qtextures.end();
 422 }
 423
 424 LoadImageCallback defaultLoader() const {
 425         return LoadImageCallback( 0, QERApp_LoadImage );
 426 }
 427 Image* loadImage( const char* name ){
 428         return defaultLoader().loadImage( name );
 429 }
 430 qtexture_t* capture( const char* name ){
 431         return capture( defaultLoader(), name );
 432 }
 433 qtexture_t* capture( const LoadImageCallback& loader, const char* name ){
 434 #if DEBUG_TEXTURES
 435         globalOutputStream() << "textures capture: " << makeQuoted( name ) << '\n';
 436 #endif
 437         return m_qtextures.capture( TextureKey( loader, name ) ).get();
 438 }
 439 void release( qtexture_t* texture ){
 440 #if DEBUG_TEXTURES
 441         globalOutputStream() << "textures release: " << makeQuoted( texture->name ) << '\n';
 442 #endif
 443         m_qtextures.release( TextureKey( texture->load, texture->name ) );
 444 }
 445 void attach( TexturesCacheObserver& observer ){
 446         ASSERT_MESSAGE( m_observer == 0, "TexturesMap::attach: cannot attach observer" );
 447         m_observer = &observer;
 448 }
 449 void detach( TexturesCacheObserver& observer ){
 450         ASSERT_MESSAGE( m_observer == &observer, "TexturesMap::detach: cannot detach observer" );
 451         m_observer = 0;
 452 }
 453 void realise(){
 454         if ( --m_unrealised == 0 ) {
 455                 g_texture_globals.bTextureCompressionSupported = false;
 456
 457                 if ( GlobalOpenGL().ARB_texture_compression() ) {
 458                         g_texture_globals.bTextureCompressionSupported = true;
 459                         g_texture_globals.m_bOpenGLCompressionSupported = true;
 460                 }
 461
 462                 if ( GlobalOpenGL().EXT_texture_compression_s3tc() ) {
 463                         g_texture_globals.bTextureCompressionSupported = true;
 464                         g_texture_globals.m_bS3CompressionSupported = true;
 465                 }
 466
 467                 switch ( g_texture_globals.texture_components )
 468                 {
 469                 case GL_RGBA:
 470                         break;
 471                 case GL_COMPRESSED_RGBA_ARB:
 472                         if ( !g_texture_globals.m_bOpenGLCompressionSupported ) {
 473                                 globalOutputStream() << "OpenGL extension GL_ARB_texture_compression not supported by current graphics drivers\n";
 474                                 g_texture_globals.m_nTextureCompressionFormat = TEXTURECOMPRESSION_NONE;
 475                                 g_texture_globals.texture_components = GL_RGBA;
 476                         }
 477                         break;
 478                 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
 479                 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
 480                 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
 481                         if ( !g_texture_globals.m_bS3CompressionSupported ) {
 482                                 globalOutputStream() << "OpenGL extension GL_EXT_texture_compression_s3tc not supported by current graphics drivers\n";
 483                                 if ( g_texture_globals.m_bOpenGLCompressionSupported ) {
 484                                         g_texture_globals.m_nTextureCompressionFormat = TEXTURECOMPRESSION_RGBA;
 485                                         g_texture_globals.texture_components = GL_COMPRESSED_RGBA_ARB;
 486                                 }
 487                                 else
 488                                 {
 489                                         g_texture_globals.m_nTextureCompressionFormat = TEXTURECOMPRESSION_NONE;
 490                                         g_texture_globals.texture_components = GL_RGBA;
 491                                 }
 492                         }
 493                         break;
 494                 default:
 495                         globalOutputStream() << "Unknown texture compression selected, reverting\n";
 496                         g_texture_globals.m_nTextureCompressionFormat = TEXTURECOMPRESSION_NONE;
 497                         g_texture_globals.texture_components = GL_RGBA;
 498                         break;
 499                 }
 500
 501
 502                 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &max_tex_size );
 503                 if ( max_tex_size == 0 ) {
 504                         max_tex_size = 1024;
 505                 }
 506
 507                 for ( qtextures_t::iterator i = m_qtextures.begin(); i != m_qtextures.end(); ++i )
 508                 {
 509                         if ( !( *i ).value.empty() ) {
 510                                 qtexture_realise( *( *i ).value, ( *i ).key );
 511                         }
 512                 }
 513                 if ( m_observer != 0 ) {
 514                         m_observer->realise();
 515                 }
 516         }
 517 }
 518 void unrealise(){
 519         if ( ++m_unrealised == 1 ) {
 520                 if ( m_observer != 0 ) {
 521                         m_observer->unrealise();
 522                 }
 523                 for ( qtextures_t::iterator i = m_qtextures.begin(); i != m_qtextures.end(); ++i )
 524                 {
 525                         if ( !( *i ).value.empty() ) {
 526                                 qtexture_unrealise( *( *i ).value );
 527                         }
 528                 }
 529         }
 530 }
 531 bool realised(){
 532         return m_unrealised == 0;
 533 }
 534 };
 535
 536 TexturesMap* g_texturesmap;
 537
 538 TexturesCache& GetTexturesCache(){
 539         return *g_texturesmap;
 540 }
 541
 542
 543 void Textures_Realise(){
 544         g_texturesmap->realise();
 545 }
 546
 547 void Textures_Unrealise(){
 548         g_texturesmap->unrealise();
 549 }
 550
 551
 552 Callback<void()> g_texturesModeChangedNotify;
 553
 554 void Textures_setModeChangedNotify( const Callback<void()>& notify ){
 555         g_texturesModeChangedNotify = notify;
 556 }
 557
 558 void Textures_ModeChanged(){
 559         if ( g_texturesmap->realised() ) {
 560                 SetTexParameters( g_texture_mode );
 561
 562                 for ( TexturesMap::iterator i = g_texturesmap->begin(); i != g_texturesmap->end(); ++i )
 563                 {
 564                         glBindTexture( GL_TEXTURE_2D, ( *i ).value->texture_number );
 565                         SetTexParameters( g_texture_mode );
 566                 }
 567
 568                 glBindTexture( GL_TEXTURE_2D, 0 );
 569         }
 570         g_texturesModeChangedNotify();
 571 }
 572
 573 void Textures_SetMode( ETexturesMode mode ){
 574         if ( g_texture_mode != mode ) {
 575                 g_texture_mode = mode;
 576
 577                 Textures_ModeChanged();
 578         }
 579 }
 580
 581 void Textures_setTextureComponents( GLint texture_components ){
 582         if ( g_texture_globals.texture_components != texture_components ) {
 583                 Textures_Unrealise();
 584                 g_texture_globals.texture_components = texture_components;
 585                 Textures_Realise();
 586         }
 587 }
 588
 589 void Textures_UpdateTextureCompressionFormat(){
 590         GLint texture_components = GL_RGBA;
 591
 592         switch ( g_texture_globals.m_nTextureCompressionFormat )
 593         {
 594         case ( TEXTURECOMPRESSION_NONE ):
 595         {
 596                 texture_components = GL_RGBA;
 597                 break;
 598         }
 599         case ( TEXTURECOMPRESSION_RGBA ):
 600         {
 601                 texture_components = GL_COMPRESSED_RGBA_ARB;
 602                 break;
 603         }
 604         case ( TEXTURECOMPRESSION_RGBA_S3TC_DXT1 ):
 605         {
 606                 texture_components = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
 607                 break;
 608         }
 609         case ( TEXTURECOMPRESSION_RGBA_S3TC_DXT3 ):
 610         {
 611                 texture_components = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
 612                 break;
 613         }
 614         case ( TEXTURECOMPRESSION_RGBA_S3TC_DXT5 ):
 615         {
 616                 texture_components = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
 617                 break;
 618         }
 619         }
 620
 621         Textures_setTextureComponents( texture_components );
 622 }
 623
 624 struct TextureCompression {
 625     static void Export(const TextureCompressionFormat &self, const Callback<void(int)> &returnz) {
 626         returnz(self);
 627     }
 628
 629     static void Import(TextureCompressionFormat &self, int value) {
 630         if (!g_texture_globals.m_bOpenGLCompressionSupported
 631             && g_texture_globals.m_bS3CompressionSupported
 632             && value >= 1) {
 633             ++value;
 634         }
 635         switch (value) {
 636             case 0:
 637                 self = TEXTURECOMPRESSION_NONE;
 638                 break;
 639             case 1:
 640                 self = TEXTURECOMPRESSION_RGBA;
 641                 break;
 642             case 2:
 643                 self = TEXTURECOMPRESSION_RGBA_S3TC_DXT1;
 644                 break;
 645             case 3:
 646                 self = TEXTURECOMPRESSION_RGBA_S3TC_DXT3;
 647                 break;
 648             case 4:
 649                 self = TEXTURECOMPRESSION_RGBA_S3TC_DXT5;
 650                 break;
 651         }
 652         Textures_UpdateTextureCompressionFormat();
 653     }
 654 };
 655
 656 struct TextureGamma {
 657         static void Export(const float &self, const Callback<void(float)> &returnz) {
 658                 returnz(self);
 659         }
 660
 661         static void Import(float &self, float value) {
 662                 if (value != self) {
 663                         Textures_Unrealise();
 664                         self = value;
 665                         Textures_Realise();
 666                 }
 667         }
 668 };
 669
 670 struct TextureMode {
 671     static void Export(const ETexturesMode &self, const Callback<void(int)> &returnz) {
 672         switch (self) {
 673             case eTextures_NEAREST:
 674                 returnz(0);
 675                 break;
 676             case eTextures_NEAREST_MIPMAP_NEAREST:
 677                 returnz(1);
 678                 break;
 679             case eTextures_LINEAR:
 680                 returnz(2);
 681                 break;
 682             case eTextures_NEAREST_MIPMAP_LINEAR:
 683                 returnz(3);
 684                 break;
 685             case eTextures_LINEAR_MIPMAP_NEAREST:
 686                 returnz(4);
 687                 break;
 688             case eTextures_LINEAR_MIPMAP_LINEAR:
 689                 returnz(5);
 690                 break;
 691             case eTextures_MAX_ANISOTROPY:
 692                 returnz(6);
 693                 break;
 694             default:
 695                 returnz(4);
 696         }
 697     }
 698
 699     static void Import(ETexturesMode &self, int value) {
 700         switch (value) {
 701             case 0:
 702                 Textures_SetMode(eTextures_NEAREST);
 703                 break;
 704             case 1:
 705                 Textures_SetMode(eTextures_NEAREST_MIPMAP_NEAREST);
 706                 break;
 707             case 2:
 708                 Textures_SetMode(eTextures_LINEAR);
 709                 break;
 710             case 3:
 711                 Textures_SetMode(eTextures_NEAREST_MIPMAP_LINEAR);
 712                 break;
 713             case 4:
 714                 Textures_SetMode(eTextures_LINEAR_MIPMAP_NEAREST);
 715                 break;
 716             case 5:
 717                 Textures_SetMode(eTextures_LINEAR_MIPMAP_LINEAR);
 718                 break;
 719             case 6:
 720                 Textures_SetMode(eTextures_MAX_ANISOTROPY);
 721         }
 722     }
 723 };
 724
 725 void Textures_constructPreferences( PreferencesPage& page ){
 726         {
 727                 const char* percentages[] = { "12.5%", "25%", "50%", "100%", };
 728                 page.appendRadio(
 729                         "Texture Quality",
 730                         STRING_ARRAY_RANGE( percentages ),
 731                         make_property( g_Textures_textureQuality )
 732                         );
 733         }
 734         page.appendSpinner(
 735                 "Texture Gamma",
 736                 1.0,
 737                 0.0,
 738                 1.0,
 739                 make_property<TextureGamma>(g_texture_globals.fGamma)
 740                 );
 741         {
 742                 const char* texture_mode[] = { "Nearest", "Nearest Mipmap", "Linear", "Bilinear", "Bilinear Mipmap", "Trilinear", "Anisotropy" };
 743                 page.appendCombo(
 744                         "Texture Render Mode",
 745                         STRING_ARRAY_RANGE( texture_mode ),
 746             make_property<TextureMode>(g_texture_mode)
 747                         );
 748         }
 749         {
 750                 const char* compression_none[] = { "None" };
 751                 const char* compression_opengl[] = { "None", "OpenGL ARB" };
 752                 const char* compression_s3tc[] = { "None", "S3TC DXT1", "S3TC DXT3", "S3TC DXT5" };
 753                 const char* compression_opengl_s3tc[] = { "None", "OpenGL ARB", "S3TC DXT1", "S3TC DXT3", "S3TC DXT5" };
 754                 StringArrayRange compression(
 755                         ( g_texture_globals.m_bOpenGLCompressionSupported )
 756                         ? ( g_texture_globals.m_bS3CompressionSupported )
 757                         ? STRING_ARRAY_RANGE( compression_opengl_s3tc )
 758                         : STRING_ARRAY_RANGE( compression_opengl )
 759                         : ( g_texture_globals.m_bS3CompressionSupported )
 760                         ? STRING_ARRAY_RANGE( compression_s3tc )
 761                         : STRING_ARRAY_RANGE( compression_none )
 762                         );
 763                 page.appendCombo(
 764                         "Hardware Texture Compression",
 765                         compression,
 766             make_property<TextureCompression>(g_texture_globals.m_nTextureCompressionFormat)
 767                         );
 768         }
 769 }
 770 void Textures_constructPage( PreferenceGroup& group ){
 771         PreferencesPage page( group.createPage( "Textures", "Texture Settings" ) );
 772         Textures_constructPreferences( page );
 773 }
 774 void Textures_registerPreferencesPage(){
 775         PreferencesDialog_addDisplayPage( makeCallbackF(Textures_constructPage) );
 776 }
 777
 778 struct TextureCompressionPreference {
 779         static void Export(const Callback<void(int)> &returnz) {
 780                 returnz(g_texture_globals.m_nTextureCompressionFormat);
 781         }
 782
 783         static void Import(int value) {
 784                 g_texture_globals.m_nTextureCompressionFormat = static_cast<TextureCompressionFormat>( value );
 785                 Textures_UpdateTextureCompressionFormat();
 786         }
 787 };
 788
 789 void Textures_Construct(){
 790         g_texturesmap = new TexturesMap;
 791
 792         GlobalPreferenceSystem().registerPreference( "TextureCompressionFormat", make_property_string<TextureCompressionPreference>() );
 793         GlobalPreferenceSystem().registerPreference( "TextureFiltering", make_property_string( reinterpret_cast<int&>( g_texture_mode ) ) );
 794         GlobalPreferenceSystem().registerPreference( "TextureQuality", make_property_string( g_Textures_textureQuality.m_latched ) );
 795         GlobalPreferenceSystem().registerPreference( "SI_Gamma", make_property_string( g_texture_globals.fGamma ) );
 796
 797         g_Textures_textureQuality.useLatched();
 798
 799         Textures_registerPreferencesPage();
 800
 801         Textures_ModeChanged();
 802 }
 803 void Textures_Destroy(){
 804         delete g_texturesmap;
 805 }
 806
 807
 808 #include "modulesystem/modulesmap.h"
 809 #include "modulesystem/singletonmodule.h"
 810 #include "modulesystem/moduleregistry.h"
 811
 812 class TexturesDependencies :
 813         public GlobalRadiantModuleRef,
 814         public GlobalOpenGLModuleRef,
 815         public GlobalPreferenceSystemModuleRef
 816 {
 817 ImageModulesRef m_image_modules;
 818 ImageModulesRef m_fallback_image_modules;
 819 public:
 820 TexturesDependencies() :
 821         m_image_modules( GlobalRadiant().getRequiredGameDescriptionKeyValue( "texturetypes" ) ),
 822         m_fallback_image_modules( "png" ){
 823 }
 824 ImageModules& getImageModules(){
 825         return m_image_modules.get();
 826 }
 827 ImageModules& getFallbackImageModules(){
 828         return m_fallback_image_modules.get();
 829 }
 830 };
 831
 832 class TexturesAPI
 833 {
 834 TexturesCache* m_textures;
 835 public:
 836 typedef TexturesCache Type;
 837 STRING_CONSTANT( Name, "*" );
 838
 839 TexturesAPI(){
 840         Textures_Construct();
 841
 842         m_textures = &GetTexturesCache();
 843 }
 844 ~TexturesAPI(){
 845         Textures_Destroy();
 846 }
 847 TexturesCache* getTable(){
 848         return m_textures;
 849 }
 850 };
 851
 852 typedef SingletonModule<TexturesAPI, TexturesDependencies> TexturesModule;
 853 typedef Static<TexturesModule> StaticTexturesModule;
 854 StaticRegisterModule staticRegisterTextures( StaticTexturesModule::instance() );
 855
 856 ImageModules& Textures_getImageModules(){
 857         return StaticTexturesModule::instance().getDependencies().getImageModules();
 858 }
 859 ImageModules& Textures_getFallbackImageModules(){
 860         return StaticTexturesModule::instance().getDependencies().getFallbackImageModules();
 861 }