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   SDL_Surface* image = IMG_Load_RW(get_physfs_SDLRWops(filename), 1);
  99   if(image == 0) {
 100     std::ostringstream msg;
 101     msg << "Couldn't load image '" << filename << "' :" << SDL_GetError();
 102     throw std::runtime_error(msg.str());
 103   }
 104
 105   Texture* result = 0;
 106   try {
 107     result = new_texture(image);
 108     result->set_filename(filename);
 109   } catch(...) {
 110     delete result;
 111     SDL_FreeSurface(image);
 112     throw;
 113   }
 114
 115   SDL_FreeSurface(image);
 116   return result;
 117 }
 118
 119 #ifdef HAVE_OPENGL
 120 void
 121 TextureManager::save_textures()
 122 {
 123 #ifdef GL_PACK_ROW_LENGTH
 124   /* all this stuff is not support by OpenGL ES */
 125   glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 126   glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
 127   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
 128   glPixelStorei(GL_PACK_SKIP_ROWS, 0);
 129   glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
 130 #endif
 131
 132   glPixelStorei(GL_PACK_ALIGNMENT, 1);
 133   for(Textures::iterator i = textures.begin(); i != textures.end(); ++i) {
 134     save_texture(*i);
 135   }
 136   for(ImageTextures::iterator i = image_textures.begin();
 137       i != image_textures.end(); ++i) {
 138     save_texture(dynamic_cast<GL::Texture *>(i->second));
 139   }
 140 }
 141
 142 void
 143 TextureManager::save_texture(GL::Texture* texture)
 144 {
 145   SavedTexture saved_texture;
 146   saved_texture.texture = texture;
 147   glBindTexture(GL_TEXTURE_2D, texture->get_handle());
 148   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH,
 149                            &saved_texture.width);
 150   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT,
 151                            &saved_texture.height);
 152   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BORDER,
 153                            &saved_texture.border);
 154   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 155                       &saved_texture.min_filter);
 156   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 157                       &saved_texture.mag_filter);
 158   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 159                       &saved_texture.wrap_s);
 160   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 161                       &saved_texture.wrap_t);
 162
 163   size_t pixelssize = saved_texture.width * saved_texture.height * 4;
 164   saved_texture.pixels = new char[pixelssize];
 165
 166   glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 167                 saved_texture.pixels);
 168
 169   saved_textures.push_back(saved_texture);
 170
 171   glDeleteTextures(1, &(texture->get_handle()));
 172   texture->set_handle(0);
 173
 174   assert_gl("retrieving texture for save");
 175 }
 176
 177 void
 178 TextureManager::reload_textures()
 179 {
 180 #ifdef GL_UNPACK_ROW_LENGTH
 181   /* OpenGL ES doesn't support these */
 182   glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 183   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
 184   glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 185   glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 186   glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
 187 #endif
 188   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 189
 190   for(std::vector<SavedTexture>::iterator i = saved_textures.begin();
 191       i != saved_textures.end(); ++i) {
 192     SavedTexture& saved_texture = *i;
 193
 194     GLuint handle;
 195     glGenTextures(1, &handle);
 196     assert_gl("creating texture handle");
 197
 198     glBindTexture(GL_TEXTURE_2D, handle);
 199     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
 200                  saved_texture.width, saved_texture.height,
 201                  saved_texture.border, GL_RGBA,
 202                  GL_UNSIGNED_BYTE, saved_texture.pixels);
 203     delete[] saved_texture.pixels;
 204     assert_gl("uploading texture pixel data");
 205
 206     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 207                     saved_texture.min_filter);
 208     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 209                     saved_texture.mag_filter);
 210     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 211                     saved_texture.wrap_s);
 212     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 213                     saved_texture.wrap_t);
 214
 215     assert_gl("setting texture_params");
 216     saved_texture.texture->set_handle(handle);
 217   }
 218
 219   saved_textures.clear();
 220 }
 221 #endif