src/video/texture_manager.cpp

   1 //  $Id$
   2 //
   3 //  SuperTux
   4 //  Copyright (C) 2006 Matthias Braun <matze@braunis.de>
   5 //
   6 //  This program is free software; you can redistribute it and/or
   7 //  modify it under the terms of the GNU General Public License
   8 //  as published by the Free Software Foundation; either version 2
   9 //  of the License, or (at your option) any later version.
  10 //
  11 //  This program is distributed in the hope that it will be useful,
  12 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 //  GNU General Public License for more details.
  15 //
  16 //  You should have received a copy of the GNU General Public License
  17 //  along with this program; if not, write to the Free Software
  18 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20 #include <config.h>
  21
  22 #include "texture_manager.hpp"
  23
  24 #include <assert.h>
  25 #include <SDL.h>
  26 #include <SDL_image.h>
  27 #include <iostream>
  28 #include <sstream>
  29 #include <stdexcept>
  30 #include "physfs/physfs_sdl.hpp"
  31 #include "video_systems.hpp"
  32 #include "gl_texture.hpp"
  33 #include "glutil.hpp"
  34 #include "gameconfig.hpp"
  35 #include "file_system.hpp"
  36 #include "log.hpp"
  37 #include "texture.hpp"
  38
  39 TextureManager* texture_manager = NULL;
  40
  41 TextureManager::TextureManager()
  42 {
  43 }
  44
  45 TextureManager::~TextureManager()
  46 {
  47   for(ImageTextures::iterator i = image_textures.begin();
  48       i != image_textures.end(); ++i) {
  49     if(i->second == NULL)
  50       continue;
  51     log_warning << "Texture '" << i->first << "' not freed" << std::endl;
  52     delete i->second;
  53   }
  54 }
  55
  56 Texture*
  57 TextureManager::get(const std::string& _filename)
  58 {
  59   std::string filename = FileSystem::normalize(_filename);
  60   ImageTextures::iterator i = image_textures.find(filename);
  61
  62   Texture* texture = NULL;
  63   if(i != image_textures.end())
  64     texture = i->second;
  65
  66   if(texture == NULL) {
  67     texture = create_image_texture(filename);
  68     image_textures[filename] = texture;
  69   }
  70
  71   return texture;
  72 }
  73
  74 void
  75 TextureManager::release(Texture* texture)
  76 {
  77   image_textures.erase(texture->get_filename());
  78   delete texture;
  79 }
  80
  81 #ifdef HAVE_OPENGL
  82 void
  83 TextureManager::register_texture(GL::Texture* texture)
  84 {
  85   textures.insert(texture);
  86 }
  87
  88 void
  89 TextureManager::remove_texture(GL::Texture* texture)
  90 {
  91   textures.erase(texture);
  92 }
  93 #endif
  94
  95 Texture*
  96 TextureManager::create_image_texture(const std::string& filename)
  97 {
  98   try {
  99
 100     SDL_Surface* image = IMG_Load_RW(get_physfs_SDLRWops(filename), 1);
 101     if(image == 0) {
 102       std::ostringstream msg;
 103       msg << "Couldn't load image '" << filename << "' :" << SDL_GetError();
 104       throw std::runtime_error(msg.str());
 105     }
 106
 107     Texture* result = 0;
 108     try {
 109       result = new_texture(image);
 110       result->set_filename(filename);
 111     } catch(...) {
 112       delete result;
 113       SDL_FreeSurface(image);
 114       throw;
 115     }
 116
 117     SDL_FreeSurface(image);
 118     return result;
 119
 120   } catch (const std::runtime_error& err) {
 121     const std::string dummy_texture_fname = "images/engine/missing.png";
 122     if (filename == dummy_texture_fname) throw err;
 123
 124     // on error, try loading placeholder file
 125     try {
 126
 127       Texture* tex = create_image_texture(dummy_texture_fname);
 128       log_warning << "Couldn't load texture '" << filename << "' (now using dummy texture): " << err.what() << std::endl;
 129       return tex;
 130
 131     } catch (...) {
 132
 133       // on error (when loading placeholder), try using empty surface
 134       try {
 135
 136         SDL_Surface* image = SDL_CreateRGBSurface(0, 1024, 1024, 8, 0, 0, 0, 0);
 137         if(image == 0) {
 138           throw err;
 139         }
 140
 141         Texture* result = 0;
 142         try {
 143           result = new_texture(image);
 144           result->set_filename("-dummy-texture-.png");
 145         } catch(...) {
 146           delete result;
 147           SDL_FreeSurface(image);
 148           throw err;
 149         }
 150
 151         SDL_FreeSurface(image);
 152         log_warning << "Couldn't load texture '" << filename << "' (now using empty one): " << err.what() << std::endl;
 153         return result;
 154
 155       // on error (when trying to use empty surface), give up
 156       } catch (const std::runtime_error& err) {
 157         throw err;
 158       }
 159     }
 160   }
 161 }
 162
 163 #ifdef HAVE_OPENGL
 164 void
 165 TextureManager::save_textures()
 166 {
 167 #ifdef GL_PACK_ROW_LENGTH
 168   /* all this stuff is not support by OpenGL ES */
 169   glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 170   glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
 171   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
 172   glPixelStorei(GL_PACK_SKIP_ROWS, 0);
 173   glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
 174 #endif
 175
 176   glPixelStorei(GL_PACK_ALIGNMENT, 1);
 177   for(Textures::iterator i = textures.begin(); i != textures.end(); ++i) {
 178     save_texture(*i);
 179   }
 180   for(ImageTextures::iterator i = image_textures.begin();
 181       i != image_textures.end(); ++i) {
 182     save_texture(dynamic_cast<GL::Texture *>(i->second));
 183   }
 184 }
 185
 186 void
 187 TextureManager::save_texture(GL::Texture* texture)
 188 {
 189   SavedTexture saved_texture;
 190   saved_texture.texture = texture;
 191   glBindTexture(GL_TEXTURE_2D, texture->get_handle());
 192   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH,
 193                            &saved_texture.width);
 194   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT,
 195                            &saved_texture.height);
 196   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BORDER,
 197                            &saved_texture.border);
 198   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 199                       &saved_texture.min_filter);
 200   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 201                       &saved_texture.mag_filter);
 202   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 203                       &saved_texture.wrap_s);
 204   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 205                       &saved_texture.wrap_t);
 206
 207   size_t pixelssize = saved_texture.width * saved_texture.height * 4;
 208   saved_texture.pixels = new char[pixelssize];
 209
 210   glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 211                 saved_texture.pixels);
 212
 213   saved_textures.push_back(saved_texture);
 214
 215   glDeleteTextures(1, &(texture->get_handle()));
 216   texture->set_handle(0);
 217
 218   assert_gl("retrieving texture for save");
 219 }
 220
 221 void
 222 TextureManager::reload_textures()
 223 {
 224 #ifdef GL_UNPACK_ROW_LENGTH
 225   /* OpenGL ES doesn't support these */
 226   glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 227   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
 228   glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 229   glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 230   glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
 231 #endif
 232   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 233
 234   for(std::vector<SavedTexture>::iterator i = saved_textures.begin();
 235       i != saved_textures.end(); ++i) {
 236     SavedTexture& saved_texture = *i;
 237
 238     GLuint handle;
 239     glGenTextures(1, &handle);
 240     assert_gl("creating texture handle");
 241
 242     glBindTexture(GL_TEXTURE_2D, handle);
 243     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
 244                  saved_texture.width, saved_texture.height,
 245                  saved_texture.border, GL_RGBA,
 246                  GL_UNSIGNED_BYTE, saved_texture.pixels);
 247     delete[] saved_texture.pixels;
 248     assert_gl("uploading texture pixel data");
 249
 250     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 251                     saved_texture.min_filter);
 252     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 253                     saved_texture.mag_filter);
 254     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 255                     saved_texture.wrap_s);
 256     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 257                     saved_texture.wrap_t);
 258
 259     assert_gl("setting texture_params");
 260     saved_texture.texture->set_handle(handle);
 261   }
 262
 263   saved_textures.clear();
 264 }
 265 #endif