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 "math/rect.hpp"
  24 #include "physfs/physfs_sdl.hpp"
  25 #include "util/file_system.hpp"
  26 #include "util/log.hpp"
  27 #include "video/gl/gl_texture.hpp"
  28 #include "video/sdl_surface_ptr.hpp"
  29 #include "video/video_systems.hpp"
  30
  31 TextureManager::TextureManager() :
  32   image_textures()
  33 #ifdef HAVE_OPENGL
  34   ,textures(),
  35   saved_textures()
  36 #endif
  37 {
  38 }
  39
  40 TextureManager::~TextureManager()
  41 {
  42   for(ImageTextures::iterator i = image_textures.begin();
  43       i != image_textures.end(); ++i) {
  44     if(i->second == NULL)
  45       continue;
  46     log_warning << "Texture '" << i->first << "' not freed" << std::endl;
  47     delete i->second;
  48   }
  49 }
  50
  51 Texture*
  52 TextureManager::get(const std::string& _filename)
  53 {
  54   std::string filename = FileSystem::normalize(_filename);
  55   ImageTextures::iterator i = image_textures.find(filename);
  56
  57   Texture* texture = NULL;
  58   if(i != image_textures.end())
  59     texture = i->second;
  60
  61   if(texture == NULL) {
  62     texture = create_image_texture(filename);
  63     image_textures[filename] = texture;
  64   }
  65
  66   return texture;
  67 }
  68
  69 Texture*
  70 TextureManager::get(const std::string& filename, const Rect& rect)
  71 {
  72   // FIXME: implement caching
  73   return create_image_texture(filename, rect);
  74 }
  75
  76 void
  77 TextureManager::release(Texture* texture)
  78 {
  79   image_textures.erase(texture->get_filename());
  80   delete texture;
  81 }
  82
  83 #ifdef HAVE_OPENGL
  84 void
  85 TextureManager::register_texture(GLTexture* texture)
  86 {
  87   textures.insert(texture);
  88 }
  89
  90 void
  91 TextureManager::remove_texture(GLTexture* texture)
  92 {
  93   textures.erase(texture);
  94 }
  95 #endif
  96
  97 Texture*
  98 TextureManager::create_image_texture(const std::string& filename, const Rect& rect)
  99 {
 100   try
 101   {
 102     return create_image_texture_raw(filename, rect);
 103   }
 104   catch(const std::exception& err)
 105   {
 106     log_warning << "Couldn't load texture '" << filename << "' (now using dummy texture): " << err.what() << std::endl;
 107     Texture* texture = create_dummy_texture();
 108     return texture;
 109   }
 110 }
 111
 112 Texture*
 113 TextureManager::create_image_texture_raw(const std::string& filename, const Rect& rect)
 114 {
 115   SDLSurfacePtr image(IMG_Load_RW(get_physfs_SDLRWops(filename), 1));
 116   if (!image)
 117   {
 118     std::ostringstream msg;
 119     msg << "Couldn't load image '" << filename << "' :" << SDL_GetError();
 120     throw std::runtime_error(msg.str());
 121   }
 122   else
 123   {
 124     SDLSurfacePtr subimage(SDL_CreateRGBSurfaceFrom(static_cast<uint8_t*>(image->pixels) + rect.top * image->pitch + rect.left * image->format->BytesPerPixel,
 125                                                     rect.get_width(), rect.get_height(),
 126                                                     image->format->BitsPerPixel,
 127                                                     image->pitch,
 128                                                     image->format->Rmask,
 129                                                     image->format->Gmask,
 130                                                     image->format->Bmask,
 131                                                     image->format->Amask));
 132     if (!subimage)
 133     {
 134       throw std::runtime_error("SDL_CreateRGBSurfaceFrom() call failed");
 135     }
 136     else
 137     {
 138       Texture* result = VideoSystem::new_texture(subimage.get());
 139       result->set_filename(filename);
 140       return result;
 141     }
 142   }
 143 }
 144
 145 Texture*
 146 TextureManager::create_image_texture(const std::string& filename)
 147 {
 148   try
 149   {
 150     return create_image_texture_raw(filename);
 151   }
 152   catch (const std::exception& err)
 153   {
 154     log_warning << "Couldn't load texture '" << filename << "' (now using dummy texture): " << err.what() << std::endl;
 155     Texture* texture = create_dummy_texture();
 156     return texture;
 157   }
 158 }
 159
 160 Texture*
 161 TextureManager::create_image_texture_raw(const std::string& filename)
 162 {
 163   SDLSurfacePtr image(IMG_Load_RW(get_physfs_SDLRWops(filename), 1));
 164   if (!image)
 165   {
 166     std::ostringstream msg;
 167     msg << "Couldn't load image '" << filename << "' :" << SDL_GetError();
 168     throw std::runtime_error(msg.str());
 169   }
 170   else
 171   {
 172     Texture* result = VideoSystem::new_texture(image.get());
 173     result->set_filename(filename);
 174     return result;
 175   }
 176 }
 177
 178 Texture*
 179 TextureManager::create_dummy_texture()
 180 {
 181   const std::string dummy_texture_fname = "images/engine/missing.png";
 182
 183   // on error, try loading placeholder file
 184   try
 185   {
 186     Texture* tex = create_image_texture_raw(dummy_texture_fname);
 187     return tex;
 188   }
 189   catch (const std::exception& err)
 190   {
 191     // on error (when loading placeholder), try using empty surface,
 192     // when that fails to, just give up
 193     SDLSurfacePtr image(SDL_CreateRGBSurface(0, 1024, 1024, 8, 0, 0, 0, 0));
 194     if (!image)
 195     {
 196       throw err;
 197     }
 198     else
 199     {
 200       Texture* result = VideoSystem::new_texture(image.get());
 201       result->set_filename("-dummy-texture-.png");
 202       log_warning << "Couldn't load texture '" << dummy_texture_fname << "' (now using empty one): " << err.what() << std::endl;
 203       return result;
 204     }
 205   }
 206 }
 207
 208 #ifdef HAVE_OPENGL
 209 void
 210 TextureManager::save_textures()
 211 {
 212 #ifdef GL_PACK_ROW_LENGTH
 213   /* all this stuff is not support by OpenGL ES */
 214   glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 215   glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
 216   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
 217   glPixelStorei(GL_PACK_SKIP_ROWS, 0);
 218   glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
 219 #endif
 220
 221   glPixelStorei(GL_PACK_ALIGNMENT, 1);
 222   for(Textures::iterator i = textures.begin(); i != textures.end(); ++i) {
 223     save_texture(*i);
 224   }
 225   for(ImageTextures::iterator i = image_textures.begin();
 226       i != image_textures.end(); ++i) {
 227     save_texture(dynamic_cast<GLTexture *>(i->second));
 228   }
 229 }
 230
 231 void
 232 TextureManager::save_texture(GLTexture* texture)
 233 {
 234   SavedTexture saved_texture;
 235   saved_texture.texture = texture;
 236   glBindTexture(GL_TEXTURE_2D, texture->get_handle());
 237
 238   //this doesn't work with OpenGL ES (but we don't need it on the GP2X anyway)
 239 #ifndef GL_VERSION_ES_CM_1_0
 240   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH,
 241                            &saved_texture.width);
 242   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT,
 243                            &saved_texture.height);
 244   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BORDER,
 245                            &saved_texture.border);
 246   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 247                       &saved_texture.min_filter);
 248   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 249                       &saved_texture.mag_filter);
 250   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 251                       &saved_texture.wrap_s);
 252   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 253                       &saved_texture.wrap_t);
 254
 255   size_t pixelssize = saved_texture.width * saved_texture.height * 4;
 256   saved_texture.pixels = new char[pixelssize];
 257
 258   glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 259                 saved_texture.pixels);
 260 #endif
 261
 262   saved_textures.push_back(saved_texture);
 263
 264   glDeleteTextures(1, &(texture->get_handle()));
 265   texture->set_handle(0);
 266
 267   assert_gl("retrieving texture for save");
 268 }
 269
 270 void
 271 TextureManager::reload_textures()
 272 {
 273 #ifdef GL_UNPACK_ROW_LENGTH
 274   /* OpenGL ES doesn't support these */
 275   glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 276   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
 277   glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 278   glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 279   glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
 280 #endif
 281   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 282
 283   for(std::vector<SavedTexture>::iterator i = saved_textures.begin();
 284       i != saved_textures.end(); ++i) {
 285     SavedTexture& saved_texture = *i;
 286
 287     GLuint handle;
 288     glGenTextures(1, &handle);
 289     assert_gl("creating texture handle");
 290
 291     glBindTexture(GL_TEXTURE_2D, handle);
 292     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
 293                  saved_texture.width, saved_texture.height,
 294                  saved_texture.border, GL_RGBA,
 295                  GL_UNSIGNED_BYTE, saved_texture.pixels);
 296     delete[] saved_texture.pixels;
 297     assert_gl("uploading texture pixel data");
 298
 299     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 300                     saved_texture.min_filter);
 301     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 302                     saved_texture.mag_filter);
 303     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 304                     saved_texture.wrap_s);
 305     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 306                     saved_texture.wrap_t);
 307
 308     assert_gl("setting texture_params");
 309     saved_texture.texture->set_handle(handle);
 310   }
 311
 312   saved_textures.clear();
 313 }
 314 #endif
 315
 316 /* EOF */