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 "gl_texture.hpp"
  32 #include "sdl_texture.hpp"
  33 #include "glutil.hpp"
  34 #include "gameconfig.hpp"
  35 #include "file_system.hpp"
  36 #include "log.hpp"
  37
  38 TextureManager* texture_manager = NULL;
  39
  40 TextureManager::TextureManager()
  41 {
  42 }
  43
  44 TextureManager::~TextureManager()
  45 {
  46   for(ImageTextures::iterator i = image_textures.begin();
  47       i != image_textures.end(); ++i) {
  48     if(i->second == NULL)
  49       continue;
  50     log_warning << "Texture '" << i->first << "' not freed" << std::endl;
  51     delete i->second;
  52   }
  53 }
  54
  55 Texture*
  56 TextureManager::get(const std::string& _filename)
  57 {
  58   std::string filename = FileSystem::normalize(_filename);
  59   ImageTextures::iterator i = image_textures.find(filename);
  60
  61   Texture* texture = NULL;
  62   if(i != image_textures.end())
  63     texture = i->second;
  64
  65   if(texture == NULL) {
  66     texture = create_image_texture(filename);
  67     image_textures[filename] = texture;
  68   }
  69
  70   return texture;
  71 }
  72
  73 void
  74 TextureManager::release(Texture* texture)
  75 {
  76   image_textures.erase(texture->get_filename());
  77   delete texture;
  78 }
  79
  80 #ifdef HAVE_OPENGL
  81 void
  82 TextureManager::register_texture(GL::Texture* texture)
  83 {
  84   textures.insert(texture);
  85 }
  86
  87 void
  88 TextureManager::remove_texture(GL::Texture* texture)
  89 {
  90   textures.erase(texture);
  91 }
  92 #endif
  93
  94 Texture*
  95 TextureManager::create_image_texture(const std::string& filename)
  96 {
  97   SDL_Surface* image = IMG_Load_RW(get_physfs_SDLRWops(filename), 1);
  98   if(image == 0) {
  99     std::ostringstream msg;
 100     msg << "Couldn't load image '" << filename << "' :" << SDL_GetError();
 101     throw std::runtime_error(msg.str());
 102   }
 103
 104   Texture* result = 0;
 105   try {
 106 #ifdef HAVE_OPENGL
 107     if(config->video == "opengl")
 108     {
 109       result = new GL::Texture(image);
 110     }
 111     else
 112 #endif
 113     {
 114       result = new SDL::Texture(image);
 115     }
 116     result->set_filename(filename);
 117   } catch(...) {
 118     delete result;
 119     SDL_FreeSurface(image);
 120     throw;
 121   }
 122
 123   SDL_FreeSurface(image);
 124   return result;
 125 }
 126
 127 #ifdef HAVE_OPENGL
 128 void
 129 TextureManager::save_textures()
 130 {
 131   glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 132   glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
 133   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
 134   glPixelStorei(GL_PACK_SKIP_ROWS, 0);
 135   glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
 136   glPixelStorei(GL_PACK_ALIGNMENT, 1);
 137   for(Textures::iterator i = textures.begin(); i != textures.end(); ++i) {
 138     save_texture(*i);
 139   }
 140   for(ImageTextures::iterator i = image_textures.begin();
 141       i != image_textures.end(); ++i) {
 142     save_texture(dynamic_cast<GL::Texture *>(i->second));
 143   }
 144 }
 145
 146 void
 147 TextureManager::save_texture(GL::Texture* texture)
 148 {
 149   SavedTexture saved_texture;
 150   saved_texture.texture = texture;
 151   glBindTexture(GL_TEXTURE_2D, texture->get_handle());
 152   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH,
 153                            &saved_texture.width);
 154   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT,
 155                            &saved_texture.height);
 156   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BORDER,
 157                            &saved_texture.border);
 158   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 159                       &saved_texture.min_filter);
 160   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 161                       &saved_texture.mag_filter);
 162   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 163                       &saved_texture.wrap_s);
 164   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 165                       &saved_texture.wrap_t);
 166
 167   size_t pixelssize = saved_texture.width * saved_texture.height * 4;
 168   saved_texture.pixels = new char[pixelssize];
 169
 170   glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 171                 saved_texture.pixels);
 172
 173   saved_textures.push_back(saved_texture);
 174
 175   glDeleteTextures(1, &(texture->get_handle()));
 176   texture->set_handle(0);
 177
 178   assert_gl("retrieving texture for save");
 179 }
 180
 181 void
 182 TextureManager::reload_textures()
 183 {
 184   glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 185   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
 186   glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 187   glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 188   glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
 189   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 190
 191   for(std::vector<SavedTexture>::iterator i = saved_textures.begin();
 192       i != saved_textures.end(); ++i) {
 193     SavedTexture& saved_texture = *i;
 194
 195     GLuint handle;
 196     glGenTextures(1, &handle);
 197     assert_gl("creating texture handle");
 198
 199     glBindTexture(GL_TEXTURE_2D, handle);
 200     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
 201                  saved_texture.width, saved_texture.height,
 202                  saved_texture.border, GL_RGBA,
 203                  GL_UNSIGNED_BYTE, saved_texture.pixels);
 204     delete[] saved_texture.pixels;
 205     assert_gl("uploading texture pixel data");
 206
 207     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 208                     saved_texture.min_filter);
 209     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 210                     saved_texture.mag_filter);
 211     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 212                     saved_texture.wrap_s);
 213     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 214                     saved_texture.wrap_t);
 215
 216     assert_gl("setting texture_params");
 217     saved_texture.texture->set_handle(handle);
 218   }
 219
 220   saved_textures.clear();
 221 }
 222 #endif