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 <assert.h>
  21 #include <iostream>
  22
  23 #include "physfs/physfs_sdl.hpp"
  24 #include "util/file_system.hpp"
  25 #include "util/log.hpp"
  26 #include "video/gl/gl_texture.hpp"
  27 #include "video/sdl_surface_ptr.hpp"
  28 #include "video/video_systems.hpp"
  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 Texture*
  69 TextureManager::get(const std::string& filename, const Rect& rect)
  70 {
  71   return 0;
  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(GLTexture* texture)
  84 {
  85   textures.insert(texture);
  86 }
  87
  88 void
  89 TextureManager::remove_texture(GLTexture* texture)
  90 {
  91   textures.erase(texture);
  92 }
  93 #endif
  94
  95 Texture*
  96 TextureManager::create_image_texture(const std::string& filename, const Rect& rect)
  97 {
  98   assert(!"not implemented");
  99   return 0;
 100 }
 101
 102 Texture*
 103 TextureManager::create_image_texture(const std::string& filename)
 104 {
 105   try
 106   {
 107     return create_image_texture_raw(filename);
 108   }
 109   catch (const std::exception& err)
 110   {
 111     log_warning << "Couldn't load texture '" << filename << "' (now using dummy texture): " << err.what() << std::endl;
 112     Texture* texture = create_dummy_texture();
 113     return texture;
 114   }
 115 }
 116
 117 Texture*
 118 TextureManager::create_image_texture_raw(const std::string& filename)
 119 {
 120   SDLSurfacePtr image(IMG_Load_RW(get_physfs_SDLRWops(filename), 1));
 121   if (!image)
 122   {
 123     std::ostringstream msg;
 124     msg << "Couldn't load image '" << filename << "' :" << SDL_GetError();
 125     throw std::runtime_error(msg.str());
 126   }
 127   else
 128   {
 129     Texture* result = VideoSystem::new_texture(image.get());
 130     result->set_filename(filename);
 131     return result;
 132   }
 133 }
 134
 135 Texture*
 136 TextureManager::create_dummy_texture()
 137 {
 138   const std::string dummy_texture_fname = "images/engine/missing.png";
 139
 140   // on error, try loading placeholder file
 141   try
 142   {
 143     Texture* tex = create_image_texture_raw(dummy_texture_fname);
 144     return tex;
 145   }
 146   catch (const std::exception& err)
 147   {
 148     // on error (when loading placeholder), try using empty surface,
 149     // when that fails to, just give up
 150     SDLSurfacePtr image(SDL_CreateRGBSurface(0, 1024, 1024, 8, 0, 0, 0, 0));
 151     if (!image)
 152     {
 153       throw err;
 154     }
 155     else
 156     {
 157       Texture* result = VideoSystem::new_texture(image.get());
 158       result->set_filename("-dummy-texture-.png");
 159       log_warning << "Couldn't load texture '" << dummy_texture_fname << "' (now using empty one): " << err.what() << std::endl;
 160       return result;
 161     }
 162   }
 163 }
 164
 165 #ifdef HAVE_OPENGL
 166 void
 167 TextureManager::save_textures()
 168 {
 169 #ifdef GL_PACK_ROW_LENGTH
 170   /* all this stuff is not support by OpenGL ES */
 171   glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 172   glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
 173   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
 174   glPixelStorei(GL_PACK_SKIP_ROWS, 0);
 175   glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
 176 #endif
 177
 178   glPixelStorei(GL_PACK_ALIGNMENT, 1);
 179   for(Textures::iterator i = textures.begin(); i != textures.end(); ++i) {
 180     save_texture(*i);
 181   }
 182   for(ImageTextures::iterator i = image_textures.begin();
 183       i != image_textures.end(); ++i) {
 184     save_texture(dynamic_cast<GLTexture *>(i->second));
 185   }
 186 }
 187
 188 void
 189 TextureManager::save_texture(GLTexture* texture)
 190 {
 191   SavedTexture saved_texture;
 192   saved_texture.texture = texture;
 193   glBindTexture(GL_TEXTURE_2D, texture->get_handle());
 194
 195   //this doesn't work with OpenGL ES (but we don't need it on the GP2X anyway)
 196 #ifndef GL_VERSION_ES_CM_1_0
 197   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH,
 198                            &saved_texture.width);
 199   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT,
 200                            &saved_texture.height);
 201   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BORDER,
 202                            &saved_texture.border);
 203   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 204                       &saved_texture.min_filter);
 205   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 206                       &saved_texture.mag_filter);
 207   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 208                       &saved_texture.wrap_s);
 209   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 210                       &saved_texture.wrap_t);
 211
 212   size_t pixelssize = saved_texture.width * saved_texture.height * 4;
 213   saved_texture.pixels = new char[pixelssize];
 214
 215   glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 216                 saved_texture.pixels);
 217 #endif
 218
 219   saved_textures.push_back(saved_texture);
 220
 221   glDeleteTextures(1, &(texture->get_handle()));
 222   texture->set_handle(0);
 223
 224   assert_gl("retrieving texture for save");
 225 }
 226
 227 void
 228 TextureManager::reload_textures()
 229 {
 230 #ifdef GL_UNPACK_ROW_LENGTH
 231   /* OpenGL ES doesn't support these */
 232   glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 233   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
 234   glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 235   glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 236   glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
 237 #endif
 238   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 239
 240   for(std::vector<SavedTexture>::iterator i = saved_textures.begin();
 241       i != saved_textures.end(); ++i) {
 242     SavedTexture& saved_texture = *i;
 243
 244     GLuint handle;
 245     glGenTextures(1, &handle);
 246     assert_gl("creating texture handle");
 247
 248     glBindTexture(GL_TEXTURE_2D, handle);
 249     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
 250                  saved_texture.width, saved_texture.height,
 251                  saved_texture.border, GL_RGBA,
 252                  GL_UNSIGNED_BYTE, saved_texture.pixels);
 253     delete[] saved_texture.pixels;
 254     assert_gl("uploading texture pixel data");
 255
 256     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 257                     saved_texture.min_filter);
 258     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 259                     saved_texture.mag_filter);
 260     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 261                     saved_texture.wrap_s);
 262     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 263                     saved_texture.wrap_t);
 264
 265     assert_gl("setting texture_params");
 266     saved_texture.texture->set_handle(handle);
 267   }
 268
 269   saved_textures.clear();
 270 }
 271 #endif
 272
 273 /* EOF */