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
  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     result = new_texture(image);
 107     result->set_filename(filename);
 108   } catch(...) {
 109     delete result;
 110     SDL_FreeSurface(image);
 111     throw;
 112   }
 113
 114   SDL_FreeSurface(image);
 115   return result;
 116 }
 117
 118 #ifdef HAVE_OPENGL
 119 void
 120 TextureManager::save_textures()
 121 {
 122   glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 123   glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
 124   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
 125   glPixelStorei(GL_PACK_SKIP_ROWS, 0);
 126   glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
 127   glPixelStorei(GL_PACK_ALIGNMENT, 1);
 128   for(Textures::iterator i = textures.begin(); i != textures.end(); ++i) {
 129     save_texture(*i);
 130   }
 131   for(ImageTextures::iterator i = image_textures.begin();
 132       i != image_textures.end(); ++i) {
 133     save_texture(dynamic_cast<GL::Texture *>(i->second));
 134   }
 135 }
 136
 137 void
 138 TextureManager::save_texture(GL::Texture* texture)
 139 {
 140   SavedTexture saved_texture;
 141   saved_texture.texture = texture;
 142   glBindTexture(GL_TEXTURE_2D, texture->get_handle());
 143   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH,
 144                            &saved_texture.width);
 145   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT,
 146                            &saved_texture.height);
 147   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BORDER,
 148                            &saved_texture.border);
 149   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 150                       &saved_texture.min_filter);
 151   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 152                       &saved_texture.mag_filter);
 153   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 154                       &saved_texture.wrap_s);
 155   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 156                       &saved_texture.wrap_t);
 157
 158   size_t pixelssize = saved_texture.width * saved_texture.height * 4;
 159   saved_texture.pixels = new char[pixelssize];
 160
 161   glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 162                 saved_texture.pixels);
 163
 164   saved_textures.push_back(saved_texture);
 165
 166   glDeleteTextures(1, &(texture->get_handle()));
 167   texture->set_handle(0);
 168
 169   assert_gl("retrieving texture for save");
 170 }
 171
 172 void
 173 TextureManager::reload_textures()
 174 {
 175   glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 176   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
 177   glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 178   glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 179   glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
 180   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 181
 182   for(std::vector<SavedTexture>::iterator i = saved_textures.begin();
 183       i != saved_textures.end(); ++i) {
 184     SavedTexture& saved_texture = *i;
 185
 186     GLuint handle;
 187     glGenTextures(1, &handle);
 188     assert_gl("creating texture handle");
 189
 190     glBindTexture(GL_TEXTURE_2D, handle);
 191     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
 192                  saved_texture.width, saved_texture.height,
 193                  saved_texture.border, GL_RGBA,
 194                  GL_UNSIGNED_BYTE, saved_texture.pixels);
 195     delete[] saved_texture.pixels;
 196     assert_gl("uploading texture pixel data");
 197
 198     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 199                     saved_texture.min_filter);
 200     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 201                     saved_texture.mag_filter);
 202     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 203                     saved_texture.wrap_s);
 204     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 205                     saved_texture.wrap_t);
 206
 207     assert_gl("setting texture_params");
 208     saved_texture.texture->set_handle(handle);
 209   }
 210
 211   saved_textures.clear();
 212 }
 213 #endif