src/video/texture_manager.cpp

   1 //  SuperTux
   2 //  Copyright (C) 2006 Matthias Braun <matze@braunis.de>
   3 //
   4 //  This program is free software: you can redistribute it and/or modify
   5 //  it under the terms of the GNU General Public License as published by
   6 //  the Free Software Foundation, either version 3 of the License, or
   7 //  (at your option) any later version.
   8 //
   9 //  This program is distributed in the hope that it will be useful,
  10 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 //  GNU General Public License for more details.
  13 //
  14 //  You should have received a copy of the GNU General Public License
  15 //  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 #include "video/texture_manager.hpp"
  18
  19 #include <SDL_image.h>
  20 #include <assert.h>
  21 #include <iostream>
  22 #include <sstream>
  23 #include <stdexcept>
  24
  25 #include "math/rect.hpp"
  26 #include "physfs/physfs_sdl.hpp"
  27 #include "util/file_system.hpp"
  28 #include "util/log.hpp"
  29 #include "video/sdl_surface_ptr.hpp"
  30 #include "video/texture.hpp"
  31 #include "video/video_system.hpp"
  32
  33 #ifdef HAVE_OPENGL
  34 #include "video/gl/gl_texture.hpp"
  35 #endif
  36
  37 TextureManager::TextureManager() :
  38   m_image_textures()
  39   ,m_surfaces()
  40 #ifdef HAVE_OPENGL
  41   ,m_textures(),
  42   m_saved_textures()
  43 #endif
  44 {
  45 }
  46
  47 TextureManager::~TextureManager()
  48 {
  49   for(ImageTextures::iterator i = m_image_textures.begin(); i != m_image_textures.end(); ++i)
  50   {
  51     if(!i->second.expired())
  52     {
  53       log_warning << "Texture '" << i->first << "' not freed" << std::endl;
  54     }
  55   }
  56   m_image_textures.clear();
  57
  58   for(auto& surface : m_surfaces)
  59   {
  60     SDL_FreeSurface(surface.second);
  61   }
  62   m_surfaces.clear();
  63 }
  64
  65 TexturePtr
  66 TextureManager::get(const std::string& _filename)
  67 {
  68   std::string filename = FileSystem::normalize(_filename);
  69   ImageTextures::iterator i = m_image_textures.find(filename);
  70
  71   TexturePtr texture;
  72   if(i != m_image_textures.end())
  73     texture = i->second.lock();
  74
  75   if(!texture) {
  76     texture = create_image_texture(filename);
  77     texture->cache_filename = filename;
  78     m_image_textures[filename] = texture;
  79   }
  80
  81   return texture;
  82 }
  83
  84 TexturePtr
  85 TextureManager::get(const std::string& _filename, const Rect& rect)
  86 {
  87   std::string filename = FileSystem::normalize(_filename);
  88   // FIXME: implement caching
  89   return create_image_texture(filename, rect);
  90 }
  91
  92 void
  93 TextureManager::reap_cache_entry(const std::string& filename)
  94 {
  95   ImageTextures::iterator i = m_image_textures.find(filename);
  96   assert(i != m_image_textures.end());
  97   assert(i->second.expired());
  98   m_image_textures.erase(i);
  99 }
 100
 101 #ifdef HAVE_OPENGL
 102 void
 103 TextureManager::register_texture(GLTexture* texture)
 104 {
 105   m_textures.insert(texture);
 106 }
 107
 108 void
 109 TextureManager::remove_texture(GLTexture* texture)
 110 {
 111   m_textures.erase(texture);
 112 }
 113 #endif
 114
 115 TexturePtr
 116 TextureManager::create_image_texture(const std::string& filename, const Rect& rect)
 117 {
 118   try
 119   {
 120     return create_image_texture_raw(filename, rect);
 121   }
 122   catch(const std::exception& err)
 123   {
 124     log_warning << "Couldn't load texture '" << filename << "' (now using dummy texture): " << err.what() << std::endl;
 125     return create_dummy_texture();
 126   }
 127 }
 128
 129 TexturePtr
 130 TextureManager::create_image_texture_raw(const std::string& filename, const Rect& rect)
 131 {
 132   SDL_Surface *image = nullptr;
 133
 134   Surfaces::iterator i = m_surfaces.find(filename);
 135   if (i != m_surfaces.end())
 136   {
 137     image = i->second;
 138   }
 139   else
 140   {
 141     image = IMG_Load_RW(get_physfs_SDLRWops(filename), 1);
 142     if (!image)
 143     {
 144       std::ostringstream msg;
 145       msg << "Couldn't load image '" << filename << "' :" << SDL_GetError();
 146       throw std::runtime_error(msg.str());
 147     }
 148
 149     m_surfaces[filename] = image;
 150   }
 151
 152   SDLSurfacePtr subimage(SDL_CreateRGBSurfaceFrom(static_cast<uint8_t*>(image->pixels) +
 153                                                   rect.top * image->pitch +
 154                                                   rect.left * image->format->BytesPerPixel,
 155                                                   rect.get_width(), rect.get_height(),
 156                                                   image->format->BitsPerPixel,
 157                                                   image->pitch,
 158                                                   image->format->Rmask,
 159                                                   image->format->Gmask,
 160                                                   image->format->Bmask,
 161                                                   image->format->Amask));
 162   if (!subimage)
 163   {
 164     throw std::runtime_error("SDL_CreateRGBSurfaceFrom() call failed");
 165   }
 166
 167 #ifdef OLD_SDL
 168   if (image->format->palette)
 169   { // copy the image palette to subimage if present
 170     SDL_SetSurfacePalette(subimage.get(), image->format->palette->colors);
 171   }
 172 #endif
 173
 174   return VideoSystem::current()->new_texture(subimage.get());
 175 }
 176
 177 TexturePtr
 178 TextureManager::create_image_texture(const std::string& filename)
 179 {
 180   try
 181   {
 182     return create_image_texture_raw(filename);
 183   }
 184   catch (const std::exception& err)
 185   {
 186     log_warning << "Couldn't load texture '" << filename << "' (now using dummy texture): " << err.what() << std::endl;
 187     return create_dummy_texture();
 188   }
 189 }
 190
 191 TexturePtr
 192 TextureManager::create_image_texture_raw(const std::string& filename)
 193 {
 194   SDLSurfacePtr image(IMG_Load_RW(get_physfs_SDLRWops(filename), 1));
 195   if (!image)
 196   {
 197     std::ostringstream msg;
 198     msg << "Couldn't load image '" << filename << "' :" << SDL_GetError();
 199     throw std::runtime_error(msg.str());
 200   }
 201   else
 202   {
 203     TexturePtr texture = VideoSystem::current()->new_texture(image.get());
 204     image.reset(NULL);
 205     return texture;
 206   }
 207 }
 208
 209 TexturePtr
 210 TextureManager::create_dummy_texture()
 211 {
 212   const std::string dummy_texture_fname = "images/engine/missing.png";
 213
 214   // on error, try loading placeholder file
 215   try
 216   {
 217     TexturePtr tex = create_image_texture_raw(dummy_texture_fname);
 218     return tex;
 219   }
 220   catch (const std::exception& err)
 221   {
 222     // on error (when loading placeholder), try using empty surface,
 223     // when that fails to, just give up
 224     SDLSurfacePtr image(SDL_CreateRGBSurface(0, 1024, 1024, 8, 0, 0, 0, 0));
 225     if (!image)
 226     {
 227       throw;
 228     }
 229     else
 230     {
 231       log_warning << "Couldn't load texture '" << dummy_texture_fname << "' (now using empty one): " << err.what() << std::endl;
 232       TexturePtr texture = VideoSystem::current()->new_texture(image.get());
 233       image.reset(NULL);
 234       return texture;
 235     }
 236   }
 237 }
 238
 239 #ifdef HAVE_OPENGL
 240 void
 241 TextureManager::save_textures()
 242 {
 243 #if defined(GL_PACK_ROW_LENGTH) || defined(USE_GLBINDING)
 244   /* all this stuff is not support by OpenGL ES */
 245   glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 246   glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
 247   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
 248   glPixelStorei(GL_PACK_SKIP_ROWS, 0);
 249   glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
 250 #endif
 251
 252   glPixelStorei(GL_PACK_ALIGNMENT, 1);
 253
 254   for(Textures::iterator i = m_textures.begin(); i != m_textures.end(); ++i)
 255   {
 256     save_texture(*i);
 257   }
 258
 259   for(ImageTextures::iterator i = m_image_textures.begin();
 260       i != m_image_textures.end(); ++i)
 261   {
 262     GLTexture* texture = dynamic_cast<GLTexture*>(i->second.lock().get());
 263     if(texture == NULL)
 264       continue;
 265
 266     save_texture(texture);
 267   }
 268 }
 269
 270 void
 271 TextureManager::save_texture(GLTexture* texture)
 272 {
 273   SavedTexture saved_texture;
 274   saved_texture.texture = texture;
 275   glBindTexture(GL_TEXTURE_2D, texture->get_handle());
 276
 277   //this doesn't work with OpenGL ES (but we don't need it on the GP2X anyway)
 278 #ifndef GL_VERSION_ES_CM_1_0
 279   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH,
 280                            &saved_texture.width);
 281   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT,
 282                            &saved_texture.height);
 283   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BORDER,
 284                            &saved_texture.border);
 285   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 286                       &saved_texture.min_filter);
 287   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 288                       &saved_texture.mag_filter);
 289   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 290                       &saved_texture.wrap_s);
 291   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 292                       &saved_texture.wrap_t);
 293
 294   size_t pixelssize = saved_texture.width * saved_texture.height * 4;
 295   saved_texture.pixels = new char[pixelssize];
 296
 297   glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 298                 saved_texture.pixels);
 299 #endif
 300
 301   m_saved_textures.push_back(saved_texture);
 302
 303   glDeleteTextures(1, &(texture->get_handle()));
 304   texture->set_handle(0);
 305
 306   assert_gl("retrieving texture for save");
 307 }
 308
 309 void
 310 TextureManager::reload_textures()
 311 {
 312 #if defined(GL_UNPACK_ROW_LENGTH) || defined(USE_GLBINDING)
 313   /* OpenGL ES doesn't support these */
 314   glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 315   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
 316   glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 317   glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 318   glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
 319 #endif
 320   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 321
 322   for(std::vector<SavedTexture>::iterator i = m_saved_textures.begin();
 323       i != m_saved_textures.end(); ++i) {
 324     SavedTexture& saved_texture = *i;
 325
 326     GLuint handle;
 327     glGenTextures(1, &handle);
 328     assert_gl("creating texture handle");
 329
 330     glBindTexture(GL_TEXTURE_2D, handle);
 331     glTexImage2D(GL_TEXTURE_2D, 0, static_cast<GLint>(GL_RGBA),
 332                  saved_texture.width, saved_texture.height,
 333                  saved_texture.border, GL_RGBA,
 334                  GL_UNSIGNED_BYTE, saved_texture.pixels);
 335     delete[] saved_texture.pixels;
 336     assert_gl("uploading texture pixel data");
 337
 338     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 339                     saved_texture.min_filter);
 340     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 341                     saved_texture.mag_filter);
 342     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 343                     saved_texture.wrap_s);
 344     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 345                     saved_texture.wrap_t);
 346
 347     assert_gl("setting texture_params");
 348     saved_texture.texture->set_handle(handle);
 349   }
 350
 351   m_saved_textures.clear();
 352 }
 353 #endif
 354
 355 /* EOF */