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   image_textures()
  32 #ifdef HAVE_OPENGL
  33   ,textures(),
  34   saved_textures()
  35 #endif
  36 {
  37 }
  38
  39 TextureManager::~TextureManager()
  40 {
  41   for(ImageTextures::iterator i = image_textures.begin();
  42       i != image_textures.end(); ++i) {
  43     if(i->second == NULL)
  44       continue;
  45     log_warning << "Texture '" << i->first << "' not freed" << std::endl;
  46     delete i->second;
  47   }
  48 }
  49
  50 Texture*
  51 TextureManager::get(const std::string& _filename)
  52 {
  53   std::string filename = FileSystem::normalize(_filename);
  54   ImageTextures::iterator i = image_textures.find(filename);
  55
  56   Texture* texture = NULL;
  57   if(i != image_textures.end())
  58     texture = i->second;
  59
  60   if(texture == NULL) {
  61     texture = create_image_texture(filename);
  62     image_textures[filename] = texture;
  63   }
  64
  65   return texture;
  66 }
  67
  68 void
  69 TextureManager::release(Texture* texture)
  70 {
  71   image_textures.erase(texture->get_filename());
  72   delete texture;
  73 }
  74
  75 #ifdef HAVE_OPENGL
  76 void
  77 TextureManager::register_texture(GLTexture* texture)
  78 {
  79   textures.insert(texture);
  80 }
  81
  82 void
  83 TextureManager::remove_texture(GLTexture* texture)
  84 {
  85   textures.erase(texture);
  86 }
  87 #endif
  88
  89 Texture*
  90 TextureManager::create_image_texture(const std::string& filename)
  91 {
  92   try {
  93
  94     SDL_Surface* image = IMG_Load_RW(get_physfs_SDLRWops(filename), 1);
  95     if(image == 0) {
  96       std::ostringstream msg;
  97       msg << "Couldn't load image '" << filename << "' :" << SDL_GetError();
  98       throw std::runtime_error(msg.str());
  99     }
 100
 101     Texture* result = 0;
 102     try {
 103       result = new_texture(image);
 104       result->set_filename(filename);
 105     } catch(...) {
 106       delete result;
 107       SDL_FreeSurface(image);
 108       throw;
 109     }
 110
 111     SDL_FreeSurface(image);
 112     return result;
 113
 114   } catch (const std::runtime_error& err) {
 115     const std::string dummy_texture_fname = "images/engine/missing.png";
 116     if (filename == dummy_texture_fname) throw err;
 117
 118     // on error, try loading placeholder file
 119     try {
 120
 121       Texture* tex = create_image_texture(dummy_texture_fname);
 122       log_warning << "Couldn't load texture '" << filename << "' (now using dummy texture): " << err.what() << std::endl;
 123       return tex;
 124
 125     } catch (...) {
 126
 127       // on error (when loading placeholder), try using empty surface
 128       try {
 129
 130         SDL_Surface* image = SDL_CreateRGBSurface(0, 1024, 1024, 8, 0, 0, 0, 0);
 131         if(image == 0) {
 132           throw err;
 133         }
 134
 135         Texture* result = 0;
 136         try {
 137           result = new_texture(image);
 138           result->set_filename("-dummy-texture-.png");
 139         } catch(...) {
 140           delete result;
 141           SDL_FreeSurface(image);
 142           throw err;
 143         }
 144
 145         SDL_FreeSurface(image);
 146         log_warning << "Couldn't load texture '" << filename << "' (now using empty one): " << err.what() << std::endl;
 147         return result;
 148
 149         // on error (when trying to use empty surface), give up
 150       } catch (const std::runtime_error& err) {
 151         throw err;
 152       }
 153     }
 154   }
 155 }
 156
 157 #ifdef HAVE_OPENGL
 158 void
 159 TextureManager::save_textures()
 160 {
 161 #ifdef GL_PACK_ROW_LENGTH
 162   /* all this stuff is not support by OpenGL ES */
 163   glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 164   glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
 165   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
 166   glPixelStorei(GL_PACK_SKIP_ROWS, 0);
 167   glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
 168 #endif
 169
 170   glPixelStorei(GL_PACK_ALIGNMENT, 1);
 171   for(Textures::iterator i = textures.begin(); i != textures.end(); ++i) {
 172     save_texture(*i);
 173   }
 174   for(ImageTextures::iterator i = image_textures.begin();
 175       i != image_textures.end(); ++i) {
 176     save_texture(dynamic_cast<GLTexture *>(i->second));
 177   }
 178 }
 179
 180 void
 181 TextureManager::save_texture(GLTexture* texture)
 182 {
 183   SavedTexture saved_texture;
 184   saved_texture.texture = texture;
 185   glBindTexture(GL_TEXTURE_2D, texture->get_handle());
 186
 187   //this doesn't work with OpenGL ES (but we don't need it on the GP2X anyway)
 188 #ifndef GL_VERSION_ES_CM_1_0
 189   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH,
 190                            &saved_texture.width);
 191   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT,
 192                            &saved_texture.height);
 193   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BORDER,
 194                            &saved_texture.border);
 195   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 196                       &saved_texture.min_filter);
 197   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 198                       &saved_texture.mag_filter);
 199   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 200                       &saved_texture.wrap_s);
 201   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 202                       &saved_texture.wrap_t);
 203
 204   size_t pixelssize = saved_texture.width * saved_texture.height * 4;
 205   saved_texture.pixels = new char[pixelssize];
 206
 207   glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 208                 saved_texture.pixels);
 209 #endif
 210
 211   saved_textures.push_back(saved_texture);
 212
 213   glDeleteTextures(1, &(texture->get_handle()));
 214   texture->set_handle(0);
 215
 216   assert_gl("retrieving texture for save");
 217 }
 218
 219 void
 220 TextureManager::reload_textures()
 221 {
 222 #ifdef GL_UNPACK_ROW_LENGTH
 223   /* OpenGL ES doesn't support these */
 224   glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 225   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
 226   glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 227   glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 228   glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
 229 #endif
 230   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 231
 232   for(std::vector<SavedTexture>::iterator i = saved_textures.begin();
 233       i != saved_textures.end(); ++i) {
 234     SavedTexture& saved_texture = *i;
 235
 236     GLuint handle;
 237     glGenTextures(1, &handle);
 238     assert_gl("creating texture handle");
 239
 240     glBindTexture(GL_TEXTURE_2D, handle);
 241     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
 242                  saved_texture.width, saved_texture.height,
 243                  saved_texture.border, GL_RGBA,
 244                  GL_UNSIGNED_BYTE, saved_texture.pixels);
 245     delete[] saved_texture.pixels;
 246     assert_gl("uploading texture pixel data");
 247
 248     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 249                     saved_texture.min_filter);
 250     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 251                     saved_texture.mag_filter);
 252     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 253                     saved_texture.wrap_s);
 254     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 255                     saved_texture.wrap_t);
 256
 257     assert_gl("setting texture_params");
 258     saved_texture.texture->set_handle(handle);
 259   }
 260
 261   saved_textures.clear();
 262 }
 263 #endif
 264
 265 /* EOF */