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