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     // on error, try loading placeholder file
 122     const std::string dummy_texture_fname = "ximages/engine/missing.png";
 123     if (filename != dummy_texture_fname) {
 124       Texture* tex = create_image_texture(dummy_texture_fname);
 125       log_warning << "Couldn't load texture '" << filename << "': " << err.what() << std::endl;
 126       return tex;
 127     }
 128     // if this also failed, escalate error
 129     throw err;
 130   }
 131 }
 132
 133 #ifdef HAVE_OPENGL
 134 void
 135 TextureManager::save_textures()
 136 {
 137 #ifdef GL_PACK_ROW_LENGTH
 138   /* all this stuff is not support by OpenGL ES */
 139   glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 140   glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
 141   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
 142   glPixelStorei(GL_PACK_SKIP_ROWS, 0);
 143   glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
 144 #endif
 145
 146   glPixelStorei(GL_PACK_ALIGNMENT, 1);
 147   for(Textures::iterator i = textures.begin(); i != textures.end(); ++i) {
 148     save_texture(*i);
 149   }
 150   for(ImageTextures::iterator i = image_textures.begin();
 151       i != image_textures.end(); ++i) {
 152     save_texture(dynamic_cast<GL::Texture *>(i->second));
 153   }
 154 }
 155
 156 void
 157 TextureManager::save_texture(GL::Texture* texture)
 158 {
 159   SavedTexture saved_texture;
 160   saved_texture.texture = texture;
 161   glBindTexture(GL_TEXTURE_2D, texture->get_handle());
 162   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH,
 163                            &saved_texture.width);
 164   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT,
 165                            &saved_texture.height);
 166   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BORDER,
 167                            &saved_texture.border);
 168   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 169                       &saved_texture.min_filter);
 170   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 171                       &saved_texture.mag_filter);
 172   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 173                       &saved_texture.wrap_s);
 174   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 175                       &saved_texture.wrap_t);
 176
 177   size_t pixelssize = saved_texture.width * saved_texture.height * 4;
 178   saved_texture.pixels = new char[pixelssize];
 179
 180   glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 181                 saved_texture.pixels);
 182
 183   saved_textures.push_back(saved_texture);
 184
 185   glDeleteTextures(1, &(texture->get_handle()));
 186   texture->set_handle(0);
 187
 188   assert_gl("retrieving texture for save");
 189 }
 190
 191 void
 192 TextureManager::reload_textures()
 193 {
 194 #ifdef GL_UNPACK_ROW_LENGTH
 195   /* OpenGL ES doesn't support these */
 196   glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 197   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
 198   glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 199   glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 200   glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
 201 #endif
 202   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 203
 204   for(std::vector<SavedTexture>::iterator i = saved_textures.begin();
 205       i != saved_textures.end(); ++i) {
 206     SavedTexture& saved_texture = *i;
 207
 208     GLuint handle;
 209     glGenTextures(1, &handle);
 210     assert_gl("creating texture handle");
 211
 212     glBindTexture(GL_TEXTURE_2D, handle);
 213     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
 214                  saved_texture.width, saved_texture.height,
 215                  saved_texture.border, GL_RGBA,
 216                  GL_UNSIGNED_BYTE, saved_texture.pixels);
 217     delete[] saved_texture.pixels;
 218     assert_gl("uploading texture pixel data");
 219
 220     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 221                     saved_texture.min_filter);
 222     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 223                     saved_texture.mag_filter);
 224     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 225                     saved_texture.wrap_s);
 226     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 227                     saved_texture.wrap_t);
 228
 229     assert_gl("setting texture_params");
 230     saved_texture.texture->set_handle(handle);
 231   }
 232
 233   saved_textures.clear();
 234 }
 235 #endif