src/tile.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "tile.h"
  21 #include "debug.h"
  22 #include "main.h" // for g_settings
  23 #include "filesys.h"
  24 #include "utility.h"
  25
  26 /*
  27         A cache from texture name to texture path
  28 */
  29 MutexedMap<std::string, std::string> g_texturename_to_path_cache;
  30
  31 /*
  32         Replaces the filename extension.
  33         eg:
  34                 std::string image = "a/image.png"
  35                 replace_ext(image, "jpg")
  36                 -> image = "a/image.jpg"
  37         Returns true on success.
  38 */
  39 static bool replace_ext(std::string &path, const char *ext)
  40 {
  41         if(ext == NULL)
  42                 return false;
  43         // Find place of last dot, fail if \ or / found.
  44         s32 last_dot_i = -1;
  45         for(s32 i=path.size()-1; i>=0; i--)
  46         {
  47                 if(path[i] == '.')
  48                 {
  49                         last_dot_i = i;
  50                         break;
  51                 }
  52
  53                 if(path[i] == '\\' || path[i] == '/')
  54                         break;
  55         }
  56         // If not found, return an empty string
  57         if(last_dot_i == -1)
  58                 return false;
  59         // Else make the new path
  60         path = path.substr(0, last_dot_i+1) + ext;
  61         return true;
  62 }
  63
  64 /*
  65         Find out the full path of an image by trying different filename
  66         extensions.
  67
  68         If failed, return "".
  69 */
  70 static std::string getImagePath(std::string path)
  71 {
  72         // A NULL-ended list of possible image extensions
  73         const char *extensions[] = {
  74                 "png", "jpg", "bmp", "tga",
  75                 "pcx", "ppm", "psd", "wal", "rgb",
  76                 NULL
  77         };
  78
  79         const char **ext = extensions;
  80         do{
  81                 bool r = replace_ext(path, *ext);
  82                 if(r == false)
  83                         return "";
  84                 if(fs::PathExists(path))
  85                         return path;
  86         }
  87         while((++ext) != NULL);
  88
  89         return "";
  90 }
  91
  92 /*
  93         Gets the path to a texture by first checking if the texture exists
  94         in texture_path and if not, using the data path.
  95
  96         Checks all supported extensions by replacing the original extension.
  97
  98         If not found, returns "".
  99
 100         Utilizes a thread-safe cache.
 101 */
 102 std::string getTexturePath(const std::string &filename)
 103 {
 104         std::string fullpath = "";
 105         /*
 106                 Check from cache
 107         */
 108         bool incache = g_texturename_to_path_cache.get(filename, &fullpath);
 109         if(incache)
 110                 return fullpath;
 111
 112         /*
 113                 Check from texture_path
 114         */
 115         std::string texture_path = g_settings.get("texture_path");
 116         if(texture_path != "")
 117         {
 118                 std::string testpath = texture_path + '/' + filename;
 119                 // Check all filename extensions. Returns "" if not found.
 120                 fullpath = getImagePath(testpath);
 121         }
 122
 123         /*
 124                 Check from default data directory
 125         */
 126         if(fullpath == "")
 127         {
 128                 std::string testpath = porting::getDataPath(filename.c_str());
 129                 // Check all filename extensions. Returns "" if not found.
 130                 fullpath = getImagePath(testpath);
 131         }
 132
 133         // Add to cache (also an empty result is cached)
 134         g_texturename_to_path_cache.set(filename, fullpath);
 135
 136         // Finally return it
 137         return fullpath;
 138 }
 139
 140 /*
 141         TextureSource
 142 */
 143
 144 TextureSource::TextureSource(IrrlichtDevice *device):
 145                 m_device(device),
 146                 m_main_atlas_image(NULL),
 147                 m_main_atlas_texture(NULL)
 148 {
 149         assert(m_device);
 150
 151         m_atlaspointer_cache_mutex.Init();
 152
 153         m_main_thread = get_current_thread_id();
 154
 155         // Add a NULL AtlasPointer as the first index, named ""
 156         m_atlaspointer_cache.push_back(SourceAtlasPointer(""));
 157         m_name_to_id[""] = 0;
 158
 159         // Build main texture atlas
 160         if(g_settings.getBool("enable_texture_atlas"))
 161                 buildMainAtlas();
 162         else
 163                 dstream<<"INFO: Not building texture atlas."<<std::endl;
 164 }
 165
 166 TextureSource::~TextureSource()
 167 {
 168 }
 169
 170 void TextureSource::processQueue()
 171 {
 172         /*
 173                 Fetch textures
 174         */
 175         if(m_get_texture_queue.size() > 0)
 176         {
 177                 GetRequest<std::string, u32, u8, u8>
 178                                 request = m_get_texture_queue.pop();
 179
 180                 dstream<<"INFO: TextureSource::processQueue(): "
 181                                 <<"got texture request with "
 182                                 <<"name=\""<<request.key<<"\""
 183                                 <<std::endl;
 184
 185                 GetResult<std::string, u32, u8, u8>
 186                                 result;
 187                 result.key = request.key;
 188                 result.callers = request.callers;
 189                 result.item = getTextureIdDirect(request.key);
 190
 191                 request.dest->push_back(result);
 192         }
 193 }
 194
 195 u32 TextureSource::getTextureId(const std::string &name)
 196 {
 197         //dstream<<"INFO: getTextureId(): \""<<name<<"\""<<std::endl;
 198
 199         {
 200                 /*
 201                         See if texture already exists
 202                 */
 203                 JMutexAutoLock lock(m_atlaspointer_cache_mutex);
 204                 core::map<std::string, u32>::Node *n;
 205                 n = m_name_to_id.find(name);
 206                 if(n != NULL)
 207                 {
 208                         return n->getValue();
 209                 }
 210         }
 211
 212         /*
 213                 Get texture
 214         */
 215         if(get_current_thread_id() == m_main_thread)
 216         {
 217                 return getTextureIdDirect(name);
 218         }
 219         else
 220         {
 221                 dstream<<"INFO: getTextureId(): Queued: name=\""<<name<<"\""<<std::endl;
 222
 223                 // We're gonna ask the result to be put into here
 224                 ResultQueue<std::string, u32, u8, u8> result_queue;
 225
 226                 // Throw a request in
 227                 m_get_texture_queue.add(name, 0, 0, &result_queue);
 228
 229                 dstream<<"INFO: Waiting for texture from main thread, name=\""
 230                                 <<name<<"\""<<std::endl;
 231
 232                 try
 233                 {
 234                         // Wait result for a second
 235                         GetResult<std::string, u32, u8, u8>
 236                                         result = result_queue.pop_front(1000);
 237
 238                         // Check that at least something worked OK
 239                         assert(result.key == name);
 240
 241                         return result.item;
 242                 }
 243                 catch(ItemNotFoundException &e)
 244                 {
 245                         dstream<<"WARNING: Waiting for texture timed out."<<std::endl;
 246                         return 0;
 247                 }
 248         }
 249
 250         dstream<<"WARNING: getTextureId(): Failed"<<std::endl;
 251
 252         return 0;
 253 }
 254
 255 // Draw a progress bar on the image
 256 void make_progressbar(float value, video::IImage *image);
 257
 258 /*
 259         Generate image based on a string like "stone.png" or "[crack0".
 260         if baseimg is NULL, it is created. Otherwise stuff is made on it.
 261 */
 262 bool generate_image(std::string part_of_name, video::IImage *& baseimg,
 263                 IrrlichtDevice *device);
 264
 265 /*
 266         Generates an image from a full string like
 267         "stone.png^mineral_coal.png^[crack0".
 268
 269         This is used by buildMainAtlas().
 270 */
 271 video::IImage* generate_image_from_scratch(std::string name,
 272                 IrrlichtDevice *device);
 273
 274 /*
 275         This method generates all the textures
 276 */
 277 u32 TextureSource::getTextureIdDirect(const std::string &name)
 278 {
 279         //dstream<<"INFO: getTextureIdDirect(): name=\""<<name<<"\""<<std::endl;
 280
 281         // Empty name means texture 0
 282         if(name == "")
 283         {
 284                 dstream<<"INFO: getTextureIdDirect(): name is empty"<<std::endl;
 285                 return 0;
 286         }
 287
 288         /*
 289                 Calling only allowed from main thread
 290         */
 291         if(get_current_thread_id() != m_main_thread)
 292         {
 293                 dstream<<"ERROR: TextureSource::getTextureIdDirect() "
 294                                 "called not from main thread"<<std::endl;
 295                 return 0;
 296         }
 297
 298         /*
 299                 See if texture already exists
 300         */
 301         {
 302                 JMutexAutoLock lock(m_atlaspointer_cache_mutex);
 303
 304                 core::map<std::string, u32>::Node *n;
 305                 n = m_name_to_id.find(name);
 306                 if(n != NULL)
 307                 {
 308                         dstream<<"INFO: getTextureIdDirect(): \""<<name
 309                                         <<"\" found in cache"<<std::endl;
 310                         return n->getValue();
 311                 }
 312         }
 313
 314         dstream<<"INFO: getTextureIdDirect(): \""<<name
 315                         <<"\" NOT found in cache. Creating it."<<std::endl;
 316
 317         /*
 318                 Get the base image
 319         */
 320
 321         char separator = '^';
 322
 323         /*
 324                 This is set to the id of the base image.
 325                 If left 0, there is no base image and a completely new image
 326                 is made.
 327         */
 328         u32 base_image_id = 0;
 329
 330         // Find last meta separator in name
 331         s32 last_separator_position = -1;
 332         for(s32 i=name.size()-1; i>=0; i--)
 333         {
 334                 if(name[i] == separator)
 335                 {
 336                         last_separator_position = i;
 337                         break;
 338                 }
 339         }
 340         /*
 341                 If separator was found, construct the base name and make the
 342                 base image using a recursive call
 343         */
 344         std::string base_image_name;
 345         if(last_separator_position != -1)
 346         {
 347                 // Construct base name
 348                 base_image_name = name.substr(0, last_separator_position);
 349                 /*dstream<<"INFO: getTextureIdDirect(): Calling itself recursively"
 350                                 " to get base image of \""<<name<<"\" = \""
 351                 <<base_image_name<<"\""<<std::endl;*/
 352                 base_image_id = getTextureIdDirect(base_image_name);
 353         }
 354
 355         //dstream<<"base_image_id="<<base_image_id<<std::endl;
 356
 357         video::IVideoDriver* driver = m_device->getVideoDriver();
 358         assert(driver);
 359
 360         video::ITexture *t = NULL;
 361
 362         /*
 363                 An image will be built from files and then converted into a texture.
 364         */
 365         video::IImage *baseimg = NULL;
 366
 367         // If a base image was found, copy it to baseimg
 368         if(base_image_id != 0)
 369         {
 370                 JMutexAutoLock lock(m_atlaspointer_cache_mutex);
 371
 372                 SourceAtlasPointer ap = m_atlaspointer_cache[base_image_id];
 373
 374                 video::IImage *image = ap.atlas_img;
 375
 376                 if(image == NULL)
 377                 {
 378                         dstream<<"WARNING: getTextureIdDirect(): NULL image in "
 379                                         <<"cache: \""<<base_image_name<<"\""
 380                                         <<std::endl;
 381                 }
 382                 else
 383                 {
 384                         core::dimension2d<u32> dim = ap.intsize;
 385
 386                         baseimg = driver->createImage(video::ECF_A8R8G8B8, dim);
 387
 388                         core::position2d<s32> pos_to(0,0);
 389                         core::position2d<s32> pos_from = ap.intpos;
 390
 391                         image->copyTo(
 392                                         baseimg, // target
 393                                         v2s32(0,0), // position in target
 394                                         core::rect<s32>(pos_from, dim) // from
 395                         );
 396
 397                         /*dstream<<"INFO: getTextureIdDirect(): Loaded \""
 398                                         <<base_image_name<<"\" from image cache"
 399                                         <<std::endl;*/
 400                 }
 401         }
 402
 403         /*
 404                 Parse out the last part of the name of the image and act
 405                 according to it
 406         */
 407
 408         std::string last_part_of_name = name.substr(last_separator_position+1);
 409         //dstream<<"last_part_of_name=\""<<last_part_of_name<<"\""<<std::endl;
 410
 411         // Generate image according to part of name
 412         if(generate_image(last_part_of_name, baseimg, m_device) == false)
 413         {
 414                 dstream<<"INFO: getTextureIdDirect(): "
 415                                 "failed to generate \""<<last_part_of_name<<"\""
 416                                 <<std::endl;
 417         }
 418
 419         // If no resulting image, print a warning
 420         if(baseimg == NULL)
 421         {
 422                 dstream<<"WARNING: getTextureIdDirect(): baseimg is NULL (attempted to"
 423                                 " create texture \""<<name<<"\""<<std::endl;
 424         }
 425
 426         if(baseimg != NULL)
 427         {
 428                 // Create texture from resulting image
 429                 t = driver->addTexture(name.c_str(), baseimg);
 430         }
 431
 432         /*
 433                 Add texture to caches (add NULL textures too)
 434         */
 435
 436         JMutexAutoLock lock(m_atlaspointer_cache_mutex);
 437
 438         u32 id = m_atlaspointer_cache.size();
 439         AtlasPointer ap(id);
 440         ap.atlas = t;
 441         ap.pos = v2f(0,0);
 442         ap.size = v2f(1,1);
 443         ap.tiled = 0;
 444         core::dimension2d<u32> baseimg_dim(0,0);
 445         if(baseimg)
 446                 baseimg_dim = baseimg->getDimension();
 447         SourceAtlasPointer nap(name, ap, baseimg, v2s32(0,0), baseimg_dim);
 448         m_atlaspointer_cache.push_back(nap);
 449         m_name_to_id.insert(name, id);
 450
 451         /*dstream<<"INFO: getTextureIdDirect(): "
 452                         <<"Returning id="<<id<<" for name \""<<name<<"\""<<std::endl;*/
 453
 454         return id;
 455 }
 456
 457 std::string TextureSource::getTextureName(u32 id)
 458 {
 459         JMutexAutoLock lock(m_atlaspointer_cache_mutex);
 460
 461         if(id >= m_atlaspointer_cache.size())
 462         {
 463                 dstream<<"WARNING: TextureSource::getTextureName(): id="<<id
 464                                 <<" >= m_atlaspointer_cache.size()="
 465                                 <<m_atlaspointer_cache.size()<<std::endl;
 466                 return "";
 467         }
 468
 469         return m_atlaspointer_cache[id].name;
 470 }
 471
 472
 473 AtlasPointer TextureSource::getTexture(u32 id)
 474 {
 475         JMutexAutoLock lock(m_atlaspointer_cache_mutex);
 476
 477         if(id >= m_atlaspointer_cache.size())
 478                 return AtlasPointer(0, NULL);
 479
 480         return m_atlaspointer_cache[id].a;
 481 }
 482
 483 void TextureSource::buildMainAtlas()
 484 {
 485         dstream<<"TextureSource::buildMainAtlas()"<<std::endl;
 486
 487         //return; // Disable (for testing)
 488
 489         video::IVideoDriver* driver = m_device->getVideoDriver();
 490         assert(driver);
 491
 492         JMutexAutoLock lock(m_atlaspointer_cache_mutex);
 493
 494         // Create an image of the right size
 495         core::dimension2d<u32> atlas_dim(1024,1024);
 496         video::IImage *atlas_img =
 497                         driver->createImage(video::ECF_A8R8G8B8, atlas_dim);
 498         //assert(atlas_img);
 499         if(atlas_img == NULL)
 500         {
 501                 dstream<<"TextureSource::buildMainAtlas(): Failed to create atlas "
 502                                 "image; not building texture atlas."<<std::endl;
 503                 return;
 504         }
 505
 506         /*
 507                 A list of stuff to add. This should contain as much of the
 508                 stuff shown in game as possible, to minimize texture changes.
 509         */
 510
 511         core::array<std::string> sourcelist;
 512
 513         sourcelist.push_back("stone.png");
 514         sourcelist.push_back("mud.png");
 515         sourcelist.push_back("sand.png");
 516         sourcelist.push_back("grass.png");
 517         sourcelist.push_back("grass_footsteps.png");
 518         sourcelist.push_back("tree.png");
 519         sourcelist.push_back("tree_top.png");
 520         sourcelist.push_back("water.png");
 521         sourcelist.push_back("leaves.png");
 522         sourcelist.push_back("glass.png");
 523         sourcelist.push_back("mud.png^grass_side.png");
 524         sourcelist.push_back("cobble.png");
 525         sourcelist.push_back("mossycobble.png");
 526         sourcelist.push_back("gravel.png");
 527         sourcelist.push_back("jungletree.png");
 528
 529         sourcelist.push_back("stone.png^mineral_coal.png");
 530         sourcelist.push_back("stone.png^mineral_iron.png");
 531
 532         // Padding to disallow texture bleeding
 533         s32 padding = 16;
 534
 535         /*
 536                 First pass: generate almost everything
 537         */
 538         core::position2d<s32> pos_in_atlas(0,0);
 539
 540         pos_in_atlas.Y += padding;
 541
 542         for(u32 i=0; i<sourcelist.size(); i++)
 543         {
 544                 std::string name = sourcelist[i];
 545
 546                 /*video::IImage *img = driver->createImageFromFile(
 547                                 getTexturePath(name.c_str()).c_str());
 548                 if(img == NULL)
 549                         continue;
 550
 551                 core::dimension2d<u32> dim = img->getDimension();
 552                 // Make a copy with the right color format
 553                 video::IImage *img2 =
 554                                 driver->createImage(video::ECF_A8R8G8B8, dim);
 555                 img->copyTo(img2);
 556                 img->drop();*/
 557
 558                 // Generate image by name
 559                 video::IImage *img2 = generate_image_from_scratch(name, m_device);
 560                 if(img2 == NULL)
 561                 {
 562                         dstream<<"WARNING: TextureSource::buildMainAtlas(): Couldn't generate texture atlas: Couldn't generate image \""<<name<<"\""<<std::endl;
 563                         continue;
 564                 }
 565
 566                 core::dimension2d<u32> dim = img2->getDimension();
 567
 568                 // Don't add to atlas if image is large
 569                 core::dimension2d<u32> max_size_in_atlas(32,32);
 570                 if(dim.Width > max_size_in_atlas.Width
 571                 || dim.Height > max_size_in_atlas.Height)
 572                 {
 573                         dstream<<"INFO: TextureSource::buildMainAtlas(): Not adding "
 574                                         <<"\""<<name<<"\" because image is large"<<std::endl;
 575                         continue;
 576                 }
 577
 578                 // Stop making atlas if atlas is full
 579                 if(pos_in_atlas.Y + dim.Height > atlas_dim.Height)
 580                 {
 581                         dstream<<"WARNING: TextureSource::buildMainAtlas(): "
 582                                         <<"Atlas is full, not adding more textures."
 583                                         <<std::endl;
 584                         break;
 585                 }
 586
 587         dstream<<"INFO: TextureSource::buildMainAtlas(): Adding \""<<name
 588                 <<"\" to texture atlas"<<std::endl;
 589
 590                 // Tile it a few times in the X direction
 591                 u16 xwise_tiling = 16;
 592                 for(u32 j=0; j<xwise_tiling; j++)
 593                 {
 594                         // Copy the copy to the atlas
 595                         img2->copyToWithAlpha(atlas_img,
 596                                         pos_in_atlas + v2s32(j*dim.Width,0),
 597                                         core::rect<s32>(v2s32(0,0), dim),
 598                                         video::SColor(255,255,255,255),
 599                                         NULL);
 600                 }
 601
 602                 // Copy the borders a few times to disallow texture bleeding
 603                 for(u32 side=0; side<2; side++) // top and bottom
 604                 for(s32 y0=0; y0<padding; y0++)
 605                 for(s32 x0=0; x0<(s32)xwise_tiling*(s32)dim.Width; x0++)
 606                 {
 607                         s32 dst_y;
 608                         s32 src_y;
 609                         if(side==0)
 610                         {
 611                                 dst_y = y0 + pos_in_atlas.Y + dim.Height;
 612                                 src_y = pos_in_atlas.Y + dim.Height - 1;
 613                         }
 614                         else
 615                         {
 616                                 dst_y = -y0 + pos_in_atlas.Y-1;
 617                                 src_y = pos_in_atlas.Y;
 618                         }
 619                         s32 x = x0 + pos_in_atlas.X * dim.Width;
 620                         video::SColor c = atlas_img->getPixel(x, src_y);
 621                         atlas_img->setPixel(x,dst_y,c);
 622                 }
 623
 624                 img2->drop();
 625
 626                 /*
 627                         Add texture to caches
 628                 */
 629
 630                 // Get next id
 631                 u32 id = m_atlaspointer_cache.size();
 632
 633                 // Create AtlasPointer
 634                 AtlasPointer ap(id);
 635                 ap.atlas = NULL; // Set on the second pass
 636                 ap.pos = v2f((float)pos_in_atlas.X/(float)atlas_dim.Width,
 637                                 (float)pos_in_atlas.Y/(float)atlas_dim.Height);
 638                 ap.size = v2f((float)dim.Width/(float)atlas_dim.Width,
 639                                 (float)dim.Width/(float)atlas_dim.Height);
 640                 ap.tiled = xwise_tiling;
 641
 642                 // Create SourceAtlasPointer and add to containers
 643                 SourceAtlasPointer nap(name, ap, atlas_img, pos_in_atlas, dim);
 644                 m_atlaspointer_cache.push_back(nap);
 645                 m_name_to_id.insert(name, id);
 646
 647                 // Increment position
 648                 pos_in_atlas.Y += dim.Height + padding * 2;
 649         }
 650
 651         /*
 652                 Make texture
 653         */
 654         video::ITexture *t = driver->addTexture("__main_atlas__", atlas_img);
 655         assert(t);
 656
 657         /*
 658                 Second pass: set texture pointer in generated AtlasPointers
 659         */
 660         for(u32 i=0; i<sourcelist.size(); i++)
 661         {
 662                 std::string name = sourcelist[i];
 663                 if(m_name_to_id.find(name) == NULL)
 664                         continue;
 665                 u32 id = m_name_to_id[name];
 666                 //dstream<<"id of name "<<name<<" is "<<id<<std::endl;
 667                 m_atlaspointer_cache[id].a.atlas = t;
 668         }
 669
 670         /*
 671                 Write image to file so that it can be inspected
 672         */
 673         /*driver->writeImageToFile(atlas_img,
 674                         getTexturePath("main_atlas.png").c_str());*/
 675 }
 676
 677 video::IImage* generate_image_from_scratch(std::string name,
 678                 IrrlichtDevice *device)
 679 {
 680         /*dstream<<"INFO: generate_image_from_scratch(): "
 681                         "\""<<name<<"\""<<std::endl;*/
 682
 683         video::IVideoDriver* driver = device->getVideoDriver();
 684         assert(driver);
 685
 686         /*
 687                 Get the base image
 688         */
 689
 690         video::IImage *baseimg = NULL;
 691
 692         char separator = '^';
 693
 694         // Find last meta separator in name
 695         s32 last_separator_position = -1;
 696         for(s32 i=name.size()-1; i>=0; i--)
 697         {
 698                 if(name[i] == separator)
 699                 {
 700                         last_separator_position = i;
 701                         break;
 702                 }
 703         }
 704
 705         /*dstream<<"INFO: generate_image_from_scratch(): "
 706                         <<"last_separator_position="<<last_separator_position
 707                         <<std::endl;*/
 708
 709         /*
 710                 If separator was found, construct the base name and make the
 711                 base image using a recursive call
 712         */
 713         std::string base_image_name;
 714         if(last_separator_position != -1)
 715         {
 716                 // Construct base name
 717                 base_image_name = name.substr(0, last_separator_position);
 718                 /*dstream<<"INFO: generate_image_from_scratch(): Calling itself recursively"
 719                                 " to get base image of \""<<name<<"\" = \""
 720                 <<base_image_name<<"\""<<std::endl;*/
 721                 baseimg = generate_image_from_scratch(base_image_name, device);
 722         }
 723
 724         /*
 725                 Parse out the last part of the name of the image and act
 726                 according to it
 727         */
 728
 729         std::string last_part_of_name = name.substr(last_separator_position+1);
 730         //dstream<<"last_part_of_name=\""<<last_part_of_name<<"\""<<std::endl;
 731
 732         // Generate image according to part of name
 733         if(generate_image(last_part_of_name, baseimg, device) == false)
 734         {
 735                 dstream<<"INFO: generate_image_from_scratch(): "
 736                                 "failed to generate \""<<last_part_of_name<<"\""
 737                                 <<std::endl;
 738                 return NULL;
 739         }
 740
 741         return baseimg;
 742 }
 743
 744 bool generate_image(std::string part_of_name, video::IImage *& baseimg,
 745                 IrrlichtDevice *device)
 746 {
 747         video::IVideoDriver* driver = device->getVideoDriver();
 748         assert(driver);
 749
 750         // Stuff starting with [ are special commands
 751         if(part_of_name[0] != '[')
 752         {
 753                 // A normal texture; load it from a file
 754                 std::string path = getTexturePath(part_of_name.c_str());
 755                 /*dstream<<"INFO: generate_image(): Loading path \""<<path
 756                                 <<"\""<<std::endl;*/
 757
 758                 video::IImage *image = driver->createImageFromFile(path.c_str());
 759
 760                 if(image == NULL)
 761                 {
 762                         dstream<<"WARNING: generate_image(): Could not load image \""
 763                     <<part_of_name<<"\" from path \""<<path<<"\""
 764                                         <<" while building texture"<<std::endl;
 765
 766                         //return false;
 767
 768                         dstream<<"WARNING: generate_image(): Creating a dummy"
 769                     <<" image for \""<<part_of_name<<"\""<<std::endl;
 770
 771                         // Just create a dummy image
 772                         //core::dimension2d<u32> dim(2,2);
 773                         core::dimension2d<u32> dim(1,1);
 774                         image = driver->createImage(video::ECF_A8R8G8B8, dim);
 775                         assert(image);
 776                         /*image->setPixel(0,0, video::SColor(255,255,0,0));
 777                         image->setPixel(1,0, video::SColor(255,0,255,0));
 778                         image->setPixel(0,1, video::SColor(255,0,0,255));
 779                         image->setPixel(1,1, video::SColor(255,255,0,255));*/
 780                         image->setPixel(0,0, video::SColor(255,myrand()%256,
 781                                         myrand()%256,myrand()%256));
 782                         /*image->setPixel(1,0, video::SColor(255,myrand()%256,
 783                                         myrand()%256,myrand()%256));
 784                         image->setPixel(0,1, video::SColor(255,myrand()%256,
 785                                         myrand()%256,myrand()%256));
 786                         image->setPixel(1,1, video::SColor(255,myrand()%256,
 787                                         myrand()%256,myrand()%256));*/
 788                 }
 789
 790                 // If base image is NULL, load as base.
 791                 if(baseimg == NULL)
 792                 {
 793                         //dstream<<"INFO: Setting "<<part_of_name<<" as base"<<std::endl;
 794                         /*
 795                                 Copy it this way to get an alpha channel.
 796                                 Otherwise images with alpha cannot be blitted on
 797                                 images that don't have alpha in the original file.
 798                         */
 799                         core::dimension2d<u32> dim = image->getDimension();
 800                         baseimg = driver->createImage(video::ECF_A8R8G8B8, dim);
 801                         image->copyTo(baseimg);
 802                         image->drop();
 803                 }
 804                 // Else blit on base.
 805                 else
 806                 {
 807                         //dstream<<"INFO: Blitting "<<part_of_name<<" on base"<<std::endl;
 808                         // Size of the copied area
 809                         core::dimension2d<u32> dim = image->getDimension();
 810                         //core::dimension2d<u32> dim(16,16);
 811                         // Position to copy the blitted to in the base image
 812                         core::position2d<s32> pos_to(0,0);
 813                         // Position to copy the blitted from in the blitted image
 814                         core::position2d<s32> pos_from(0,0);
 815                         // Blit
 816                         image->copyToWithAlpha(baseimg, pos_to,
 817                                         core::rect<s32>(pos_from, dim),
 818                                         video::SColor(255,255,255,255),
 819                                         NULL);
 820                         // Drop image
 821                         image->drop();
 822                 }
 823         }
 824         else
 825         {
 826                 // A special texture modification
 827
 828                 dstream<<"INFO: generate_image(): generating special "
 829                                 <<"modification \""<<part_of_name<<"\""
 830                                 <<std::endl;
 831
 832                 /*
 833                         This is the simplest of all; it just adds stuff to the
 834                         name so that a separate texture is created.
 835
 836                         It is used to make textures for stuff that doesn't want
 837                         to implement getting the texture from a bigger texture
 838                         atlas.
 839                 */
 840                 if(part_of_name == "[forcesingle")
 841                 {
 842                 }
 843                 /*
 844                         [crackN
 845                         Adds a cracking texture
 846                 */
 847                 else if(part_of_name.substr(0,6) == "[crack")
 848                 {
 849                         if(baseimg == NULL)
 850                         {
 851                                 dstream<<"WARNING: generate_image(): baseimg==NULL "
 852                                                 <<"for part_of_name=\""<<part_of_name
 853                                                 <<"\", cancelling."<<std::endl;
 854                                 return false;
 855                         }
 856
 857                         // Crack image number
 858                         u16 progression = stoi(part_of_name.substr(6));
 859
 860                         // Size of the base image
 861                         core::dimension2d<u32> dim_base = baseimg->getDimension();
 862
 863                         /*
 864                                 Load crack image.
 865
 866                                 It is an image with a number of cracking stages
 867                                 horizontally tiled.
 868                         */
 869                         video::IImage *img_crack = driver->createImageFromFile(
 870                                         getTexturePath("crack.png").c_str());
 871
 872                         if(img_crack)
 873                         {
 874                                 // Dimension of original image
 875                                 core::dimension2d<u32> dim_crack
 876                                                 = img_crack->getDimension();
 877                                 // Count of crack stages
 878                                 u32 crack_count = dim_crack.Height / dim_crack.Width;
 879                                 // Limit progression
 880                                 if(progression > crack_count-1)
 881                                         progression = crack_count-1;
 882                                 // Dimension of a single scaled crack stage
 883                                 core::dimension2d<u32> dim_crack_scaled_single(
 884                                         dim_base.Width,
 885                                         dim_base.Height
 886                                 );
 887                                 // Dimension of scaled size
 888                                 core::dimension2d<u32> dim_crack_scaled(
 889                                         dim_crack_scaled_single.Width,
 890                                         dim_crack_scaled_single.Height * crack_count
 891                                 );
 892                                 // Create scaled crack image
 893                                 video::IImage *img_crack_scaled = driver->createImage(
 894                                                 video::ECF_A8R8G8B8, dim_crack_scaled);
 895                                 if(img_crack_scaled)
 896                                 {
 897                                         // Scale crack image by copying
 898                                         img_crack->copyToScaling(img_crack_scaled);
 899
 900                                         // Position to copy the crack from
 901                                         core::position2d<s32> pos_crack_scaled(
 902                                                 0,
 903                                                 dim_crack_scaled_single.Height * progression
 904                                         );
 905
 906                                         // This tiling does nothing currently but is useful
 907                                         for(u32 y0=0; y0<dim_base.Height
 908                                                         / dim_crack_scaled_single.Height; y0++)
 909                                         for(u32 x0=0; x0<dim_base.Width
 910                                                         / dim_crack_scaled_single.Width; x0++)
 911                                         {
 912                                                 // Position to copy the crack to in the base image
 913                                                 core::position2d<s32> pos_base(
 914                                                         x0*dim_crack_scaled_single.Width,
 915                                                         y0*dim_crack_scaled_single.Height
 916                                                 );
 917                                                 // Rectangle to copy the crack from on the scaled image
 918                                                 core::rect<s32> rect_crack_scaled(
 919                                                         pos_crack_scaled,
 920                                                         dim_crack_scaled_single
 921                                                 );
 922                                                 // Copy it
 923                                                 img_crack_scaled->copyToWithAlpha(baseimg, pos_base,
 924                                                                 rect_crack_scaled,
 925                                                                 video::SColor(255,255,255,255),
 926                                                                 NULL);
 927                                         }
 928
 929                                         img_crack_scaled->drop();
 930                                 }
 931
 932                                 img_crack->drop();
 933                         }
 934                 }
 935                 /*
 936                         [combine:WxH:X,Y=filename:X,Y=filename2
 937                         Creates a bigger texture from an amount of smaller ones
 938                 */
 939                 else if(part_of_name.substr(0,8) == "[combine")
 940                 {
 941                         Strfnd sf(part_of_name);
 942                         sf.next(":");
 943                         u32 w0 = stoi(sf.next("x"));
 944                         u32 h0 = stoi(sf.next(":"));
 945                         dstream<<"INFO: combined w="<<w0<<" h="<<h0<<std::endl;
 946                         core::dimension2d<u32> dim(w0,h0);
 947                         baseimg = driver->createImage(video::ECF_A8R8G8B8, dim);
 948                         while(sf.atend() == false)
 949                         {
 950                                 u32 x = stoi(sf.next(","));
 951                                 u32 y = stoi(sf.next("="));
 952                                 std::string filename = sf.next(":");
 953                                 dstream<<"INFO: Adding \""<<filename
 954                                                 <<"\" to combined ("<<x<<","<<y<<")"
 955                                                 <<std::endl;
 956                                 video::IImage *img = driver->createImageFromFile(
 957                                                 getTexturePath(filename.c_str()).c_str());
 958                                 if(img)
 959                                 {
 960                                         core::dimension2d<u32> dim = img->getDimension();
 961                                         dstream<<"INFO: Size "<<dim.Width
 962                                                         <<"x"<<dim.Height<<std::endl;
 963                                         core::position2d<s32> pos_base(x, y);
 964                                         video::IImage *img2 =
 965                                                         driver->createImage(video::ECF_A8R8G8B8, dim);
 966                                         img->copyTo(img2);
 967                                         img->drop();
 968                                         img2->copyToWithAlpha(baseimg, pos_base,
 969                                                         core::rect<s32>(v2s32(0,0), dim),
 970                                                         video::SColor(255,255,255,255),
 971                                                         NULL);
 972                                         img2->drop();
 973                                 }
 974                                 else
 975                                 {
 976                                         dstream<<"WARNING: img==NULL"<<std::endl;
 977                                 }
 978                         }
 979                 }
 980                 /*
 981                         [progressbarN
 982                         Adds a progress bar, 0.0 <= N <= 1.0
 983                 */
 984                 else if(part_of_name.substr(0,12) == "[progressbar")
 985                 {
 986                         if(baseimg == NULL)
 987                         {
 988                                 dstream<<"WARNING: generate_image(): baseimg==NULL "
 989                                                 <<"for part_of_name=\""<<part_of_name
 990                                                 <<"\", cancelling."<<std::endl;
 991                                 return false;
 992                         }
 993
 994                         float value = stof(part_of_name.substr(12));
 995                         make_progressbar(value, baseimg);
 996                 }
 997                 /*
 998                         "[noalpha:filename.png"
 999                         Use an image without it's alpha channel.
1000                         Used for the leaves texture when in old leaves mode, so
1001                         that the transparent parts don't look completely black
1002                         when simple alpha channel is used for rendering.
1003                 */
1004                 else if(part_of_name.substr(0,8) == "[noalpha")
1005                 {
1006                         if(baseimg != NULL)
1007                         {
1008                                 dstream<<"WARNING: generate_image(): baseimg!=NULL "
1009                                                 <<"for part_of_name=\""<<part_of_name
1010                                                 <<"\", cancelling."<<std::endl;
1011                                 return false;
1012                         }
1013
1014                         std::string filename = part_of_name.substr(9);
1015
1016                         std::string path = getTexturePath(filename.c_str());
1017
1018                         dstream<<"INFO: generate_image(): Loading path \""<<path
1019                                         <<"\""<<std::endl;
1020
1021                         video::IImage *image = driver->createImageFromFile(path.c_str());
1022
1023                         if(image == NULL)
1024                         {
1025                                 dstream<<"WARNING: generate_image(): Loading path \""
1026                                                 <<path<<"\" failed"<<std::endl;
1027                         }
1028                         else
1029                         {
1030                                 core::dimension2d<u32> dim = image->getDimension();
1031                                 baseimg = driver->createImage(video::ECF_A8R8G8B8, dim);
1032
1033                                 // Set alpha to full
1034                                 for(u32 y=0; y<dim.Height; y++)
1035                                 for(u32 x=0; x<dim.Width; x++)
1036                                 {
1037                                         video::SColor c = image->getPixel(x,y);
1038                                         c.setAlpha(255);
1039                                         image->setPixel(x,y,c);
1040                                 }
1041                                 // Blit
1042                                 image->copyTo(baseimg);
1043
1044                                 image->drop();
1045                         }
1046                 }
1047                 /*
1048                         [inventorycube{topimage{leftimage{rightimage
1049                         In every subimage, replace ^ with &.
1050                         Create an "inventory cube".
1051                         NOTE: This should be used only on its own.
1052                         Example (a grass block (not actually used in game):
1053                         "[inventorycube{grass.png{mud.png&grass_side.png{mud.png&grass_side.png"
1054                 */
1055                 else if(part_of_name.substr(0,14) == "[inventorycube")
1056                 {
1057                         if(baseimg != NULL)
1058                         {
1059                                 dstream<<"WARNING: generate_image(): baseimg!=NULL "
1060                                                 <<"for part_of_name=\""<<part_of_name
1061                                                 <<"\", cancelling."<<std::endl;
1062                                 return false;
1063                         }
1064
1065                         str_replace_char(part_of_name, '&', '^');
1066                         Strfnd sf(part_of_name);
1067                         sf.next("{");
1068                         std::string imagename_top = sf.next("{");
1069                         std::string imagename_left = sf.next("{");
1070                         std::string imagename_right = sf.next("{");
1071
1072 #if 1
1073                         //TODO
1074
1075                         if(driver->queryFeature(video::EVDF_RENDER_TO_TARGET) == false)
1076                         {
1077                                 dstream<<"WARNING: generate_image(): EVDF_RENDER_TO_TARGET"
1078                                                 " not supported. Creating fallback image"<<std::endl;
1079                                 baseimg = generate_image_from_scratch(
1080                                                 imagename_top, device);
1081                                 return true;
1082                         }
1083
1084                         u32 w0 = 64;
1085                         u32 h0 = 64;
1086                         //dstream<<"INFO: inventorycube w="<<w0<<" h="<<h0<<std::endl;
1087                         core::dimension2d<u32> dim(w0,h0);
1088
1089                         // Generate images for the faces of the cube
1090                         video::IImage *img_top = generate_image_from_scratch(
1091                                         imagename_top, device);
1092                         video::IImage *img_left = generate_image_from_scratch(
1093                                         imagename_left, device);
1094                         video::IImage *img_right = generate_image_from_scratch(
1095                                         imagename_right, device);
1096                         assert(img_top && img_left && img_right);
1097
1098                         // TODO: Create textures from images
1099                         video::ITexture *texture_top = driver->addTexture(
1100                                         (imagename_top + "__temp__").c_str(), img_top);
1101                         assert(texture_top);
1102
1103                         // Drop images
1104                         img_top->drop();
1105                         img_left->drop();
1106                         img_right->drop();
1107
1108                         // Create render target texture
1109                         video::ITexture *rtt = NULL;
1110                         std::string rtt_name = part_of_name + "_RTT";
1111                         rtt = driver->addRenderTargetTexture(dim, rtt_name.c_str(),
1112                                         video::ECF_A8R8G8B8);
1113                         assert(rtt);
1114
1115                         // Set render target
1116                         driver->setRenderTarget(rtt, true, true,
1117                                         video::SColor(0,0,0,0));
1118
1119                         // Get a scene manager
1120                         scene::ISceneManager *smgr_main = device->getSceneManager();
1121                         assert(smgr_main);
1122                         scene::ISceneManager *smgr = smgr_main->createNewSceneManager();
1123                         assert(smgr);
1124
1125                         /*
1126                                 Create scene:
1127                                 - An unit cube is centered at 0,0,0
1128                                 - Camera looks at cube from Y+, Z- towards Y-, Z+
1129                                 NOTE: Cube has to be changed to something else because
1130                                 the textures cannot be set individually (or can they?)
1131                         */
1132
1133                         scene::ISceneNode* cube = smgr->addCubeSceneNode(1.0, NULL, -1,
1134                                         v3f(0,0,0), v3f(0, 45, 0));
1135                         // Set texture of cube
1136                         cube->setMaterialTexture(0, texture_top);
1137                         //cube->setMaterialFlag(video::EMF_LIGHTING, false);
1138                         cube->setMaterialFlag(video::EMF_ANTI_ALIASING, false);
1139                         cube->setMaterialFlag(video::EMF_BILINEAR_FILTER, false);
1140
1141                         scene::ICameraSceneNode* camera = smgr->addCameraSceneNode(0,
1142                                         v3f(0, 1.0, -1.5), v3f(0, 0, 0));
1143                         // Set orthogonal projection
1144                         core::CMatrix4<f32> pm;
1145                         pm.buildProjectionMatrixOrthoLH(1.65, 1.65, 0, 100);
1146                         camera->setProjectionMatrix(pm, true);
1147
1148                         /*scene::ILightSceneNode *light =*/ smgr->addLightSceneNode(0,
1149                                         v3f(-50, 100, 0), video::SColorf(0.5,0.5,0.5), 1000);
1150
1151                         smgr->setAmbientLight(video::SColorf(0.2,0.2,0.2));
1152
1153                         // Render scene
1154                         driver->beginScene(true, true, video::SColor(0,0,0,0));
1155                         smgr->drawAll();
1156                         driver->endScene();
1157
1158                         // NOTE: The scene nodes should not be dropped, otherwise
1159                         //       smgr->drop() segfaults
1160                         /*cube->drop();
1161                         camera->drop();
1162                         light->drop();*/
1163                         // Drop scene manager
1164                         smgr->drop();
1165
1166                         // Unset render target
1167                         driver->setRenderTarget(0, true, true, 0);
1168
1169                         //TODO: Free textures of images
1170                         driver->removeTexture(texture_top);
1171
1172                         // Create image of render target
1173                         video::IImage *image = driver->createImage(rtt, v2s32(0,0), dim);
1174
1175                         assert(image);
1176
1177                         baseimg = driver->createImage(video::ECF_A8R8G8B8, dim);
1178
1179                         if(image)
1180                         {
1181                                 image->copyTo(baseimg);
1182                                 image->drop();
1183                         }
1184 #endif
1185                 }
1186                 else
1187                 {
1188                         dstream<<"WARNING: generate_image(): Invalid "
1189                                         " modification: \""<<part_of_name<<"\""<<std::endl;
1190                 }
1191         }
1192
1193         return true;
1194 }
1195
1196 void make_progressbar(float value, video::IImage *image)
1197 {
1198         if(image == NULL)
1199                 return;
1200
1201         core::dimension2d<u32> size = image->getDimension();
1202
1203         u32 barheight = size.Height/16;
1204         u32 barpad_x = size.Width/16;
1205         u32 barpad_y = size.Height/16;
1206         u32 barwidth = size.Width - barpad_x*2;
1207         v2u32 barpos(barpad_x, size.Height - barheight - barpad_y);
1208
1209         u32 barvalue_i = (u32)(((float)barwidth * value) + 0.5);
1210
1211         video::SColor active(255,255,0,0);
1212         video::SColor inactive(255,0,0,0);
1213         for(u32 x0=0; x0<barwidth; x0++)
1214         {
1215                 video::SColor *c;
1216                 if(x0 < barvalue_i)
1217                         c = &active;
1218                 else
1219                         c = &inactive;
1220                 u32 x = x0 + barpos.X;
1221                 for(u32 y=barpos.Y; y<barpos.Y+barheight; y++)
1222                 {
1223                         image->setPixel(x,y, *c);
1224                 }
1225         }
1226 }
1227