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 <iostream>
  21
  22 #include "physfs/physfs_sdl.hpp"
  23 #include "util/file_system.hpp"
  24 #include "util/log.hpp"
  25 #include "video/gl/gl_texture.hpp"
  26 #include "video/video_systems.hpp"
  27
  28 TextureManager::TextureManager() :
  29   image_textures()
  30 #ifdef HAVE_OPENGL
  31   ,textures(),
  32   saved_textures()
  33 #endif
  34 {
  35 }
  36
  37 TextureManager::~TextureManager()
  38 {
  39   for(ImageTextures::iterator i = image_textures.begin();
  40       i != image_textures.end(); ++i) {
  41     if(i->second == NULL)
  42       continue;
  43     log_warning << "Texture '" << i->first << "' not freed" << std::endl;
  44     delete i->second;
  45   }
  46 }
  47
  48 Texture*
  49 TextureManager::get(const std::string& _filename)
  50 {
  51   std::string filename = FileSystem::normalize(_filename);
  52   ImageTextures::iterator i = image_textures.find(filename);
  53
  54   Texture* texture = NULL;
  55   if(i != image_textures.end())
  56     texture = i->second;
  57
  58   if(texture == NULL) {
  59     texture = create_image_texture(filename);
  60     image_textures[filename] = texture;
  61   }
  62
  63   return texture;
  64 }
  65
  66 void
  67 TextureManager::release(Texture* texture)
  68 {
  69   image_textures.erase(texture->get_filename());
  70   delete texture;
  71 }
  72
  73 #ifdef HAVE_OPENGL
  74 void
  75 TextureManager::register_texture(GLTexture* texture)
  76 {
  77   textures.insert(texture);
  78 }
  79
  80 void
  81 TextureManager::remove_texture(GLTexture* texture)
  82 {
  83   textures.erase(texture);
  84 }
  85 #endif
  86
  87 Texture*
  88 TextureManager::create_image_texture(const std::string& filename)
  89 {
  90   try {
  91
  92     SDL_Surface* image = IMG_Load_RW(get_physfs_SDLRWops(filename), 1);
  93     if(image == 0) {
  94       std::ostringstream msg;
  95       msg << "Couldn't load image '" << filename << "' :" << SDL_GetError();
  96       throw std::runtime_error(msg.str());
  97     }
  98
  99     Texture* result = 0;
 100     try {
 101       result = new_texture(image);
 102       result->set_filename(filename);
 103     } catch(...) {
 104       delete result;
 105       SDL_FreeSurface(image);
 106       throw;
 107     }
 108
 109     SDL_FreeSurface(image);
 110     return result;
 111
 112   } catch (const std::runtime_error& err) {
 113     const std::string dummy_texture_fname = "images/engine/missing.png";
 114     if (filename == dummy_texture_fname) throw err;
 115
 116     // on error, try loading placeholder file
 117     try {
 118
 119       Texture* tex = create_image_texture(dummy_texture_fname);
 120       log_warning << "Couldn't load texture '" << filename << "' (now using dummy texture): " << err.what() << std::endl;
 121       return tex;
 122
 123     } catch (...) {
 124
 125       // on error (when loading placeholder), try using empty surface
 126       try {
 127
 128         SDL_Surface* image = SDL_CreateRGBSurface(0, 1024, 1024, 8, 0, 0, 0, 0);
 129         if(image == 0) {
 130           throw err;
 131         }
 132
 133         Texture* result = 0;
 134         try {
 135           result = new_texture(image);
 136           result->set_filename("-dummy-texture-.png");
 137         } catch(...) {
 138           delete result;
 139           SDL_FreeSurface(image);
 140           throw err;
 141         }
 142
 143         SDL_FreeSurface(image);
 144         log_warning << "Couldn't load texture '" << filename << "' (now using empty one): " << err.what() << std::endl;
 145         return result;
 146
 147         // on error (when trying to use empty surface), give up
 148       } catch (const std::runtime_error& err) {
 149         throw err;
 150       }
 151     }
 152   }
 153 }
 154
 155 #ifdef HAVE_OPENGL
 156 void
 157 TextureManager::save_textures()
 158 {
 159 #ifdef GL_PACK_ROW_LENGTH
 160   /* all this stuff is not support by OpenGL ES */
 161   glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 162   glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
 163   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
 164   glPixelStorei(GL_PACK_SKIP_ROWS, 0);
 165   glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
 166 #endif
 167
 168   glPixelStorei(GL_PACK_ALIGNMENT, 1);
 169   for(Textures::iterator i = textures.begin(); i != textures.end(); ++i) {
 170     save_texture(*i);
 171   }
 172   for(ImageTextures::iterator i = image_textures.begin();
 173       i != image_textures.end(); ++i) {
 174     save_texture(dynamic_cast<GLTexture *>(i->second));
 175   }
 176 }
 177
 178 void
 179 TextureManager::save_texture(GLTexture* texture)
 180 {
 181   SavedTexture saved_texture;
 182   saved_texture.texture = texture;
 183   glBindTexture(GL_TEXTURE_2D, texture->get_handle());
 184
 185   //this doesn't work with OpenGL ES (but we don't need it on the GP2X anyway)
 186 #ifndef GL_VERSION_ES_CM_1_0
 187   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH,
 188                            &saved_texture.width);
 189   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT,
 190                            &saved_texture.height);
 191   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BORDER,
 192                            &saved_texture.border);
 193   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 194                       &saved_texture.min_filter);
 195   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 196                       &saved_texture.mag_filter);
 197   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 198                       &saved_texture.wrap_s);
 199   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 200                       &saved_texture.wrap_t);
 201
 202   size_t pixelssize = saved_texture.width * saved_texture.height * 4;
 203   saved_texture.pixels = new char[pixelssize];
 204
 205   glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 206                 saved_texture.pixels);
 207 #endif
 208
 209   saved_textures.push_back(saved_texture);
 210
 211   glDeleteTextures(1, &(texture->get_handle()));
 212   texture->set_handle(0);
 213
 214   assert_gl("retrieving texture for save");
 215 }
 216
 217 void
 218 TextureManager::reload_textures()
 219 {
 220 #ifdef GL_UNPACK_ROW_LENGTH
 221   /* OpenGL ES doesn't support these */
 222   glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 223   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
 224   glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 225   glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 226   glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
 227 #endif
 228   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 229
 230   for(std::vector<SavedTexture>::iterator i = saved_textures.begin();
 231       i != saved_textures.end(); ++i) {
 232     SavedTexture& saved_texture = *i;
 233
 234     GLuint handle;
 235     glGenTextures(1, &handle);
 236     assert_gl("creating texture handle");
 237
 238     glBindTexture(GL_TEXTURE_2D, handle);
 239     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
 240                  saved_texture.width, saved_texture.height,
 241                  saved_texture.border, GL_RGBA,
 242                  GL_UNSIGNED_BYTE, saved_texture.pixels);
 243     delete[] saved_texture.pixels;
 244     assert_gl("uploading texture pixel data");
 245
 246     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 247                     saved_texture.min_filter);
 248     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 249                     saved_texture.mag_filter);
 250     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 251                     saved_texture.wrap_s);
 252     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 253                     saved_texture.wrap_t);
 254
 255     assert_gl("setting texture_params");
 256     saved_texture.texture->set_handle(handle);
 257   }
 258
 259   saved_textures.clear();
 260 }
 261 #endif
 262
 263 /* EOF */