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 #include <sstream>
  23 #include <stdexcept>
  24
  25 #include "math/rect.hpp"
  26 #include "physfs/physfs_sdl.hpp"
  27 #include "util/file_system.hpp"
  28 #include "util/log.hpp"
  29 #include "video/sdl_surface_ptr.hpp"
  30 #include "video/texture.hpp"
  31 #include "video/video_systems.hpp"
  32
  33 #ifdef HAVE_OPENGL
  34 #include "video/gl/gl_texture.hpp"
  35 #endif
  36
  37 TextureManager::TextureManager() :
  38   image_textures()
  39 #ifdef HAVE_OPENGL
  40   ,textures(),
  41   saved_textures()
  42 #endif
  43 {
  44 }
  45
  46 TextureManager::~TextureManager()
  47 {
  48   for(ImageTextures::iterator i = image_textures.begin(); i != image_textures.end(); ++i)
  49   {
  50     if(!i->second.expired())
  51     {
  52       log_warning << "Texture '" << i->first << "' not freed" << std::endl;
  53     }
  54   }
  55   image_textures.clear();
  56 }
  57
  58 TexturePtr
  59 TextureManager::get(const std::string& _filename)
  60 {
  61   std::string filename = FileSystem::normalize(_filename);
  62   ImageTextures::iterator i = image_textures.find(filename);
  63
  64   TexturePtr texture;
  65   if(i != image_textures.end())
  66     texture = i->second.lock();
  67
  68   if(!texture) {
  69     texture = create_image_texture(filename);
  70     texture->cache_filename = filename;
  71     image_textures[filename] = texture;
  72   }
  73
  74   return texture;
  75 }
  76
  77 TexturePtr
  78 TextureManager::get(const std::string& filename, const Rect& rect)
  79 {
  80   // FIXME: implement caching
  81   return create_image_texture(filename, rect);
  82 }
  83
  84 void
  85 TextureManager::reap_cache_entry(const std::string& filename)
  86 {
  87   ImageTextures::iterator i = image_textures.find(filename);
  88   assert(i != image_textures.end());
  89   assert(i->second.expired());
  90   image_textures.erase(i);
  91 }
  92
  93 #ifdef HAVE_OPENGL
  94 void
  95 TextureManager::register_texture(GLTexture* texture)
  96 {
  97   textures.insert(texture);
  98 }
  99
 100 void
 101 TextureManager::remove_texture(GLTexture* texture)
 102 {
 103   textures.erase(texture);
 104 }
 105 #endif
 106
 107 TexturePtr
 108 TextureManager::create_image_texture(const std::string& filename, const Rect& rect)
 109 {
 110   try
 111   {
 112     return create_image_texture_raw(filename, rect);
 113   }
 114   catch(const std::exception& err)
 115   {
 116     log_warning << "Couldn't load texture '" << filename << "' (now using dummy texture): " << err.what() << std::endl;
 117     return create_dummy_texture();
 118   }
 119 }
 120
 121 TexturePtr
 122 TextureManager::create_image_texture_raw(const std::string& filename, const Rect& rect)
 123 {
 124   SDLSurfacePtr image(IMG_Load_RW(get_physfs_SDLRWops(filename), 1));
 125   if (!image)
 126   {
 127     std::ostringstream msg;
 128     msg << "Couldn't load image '" << filename << "' :" << SDL_GetError();
 129     throw std::runtime_error(msg.str());
 130   }
 131   else
 132   {
 133     SDLSurfacePtr subimage(SDL_CreateRGBSurfaceFrom(static_cast<uint8_t*>(image->pixels) +
 134                                                     rect.top * image->pitch +
 135                                                     rect.left * image->format->BytesPerPixel,
 136
 137                                                     rect.get_width(), rect.get_height(),
 138                                                     image->format->BitsPerPixel,
 139                                                     image->pitch,
 140                                                     image->format->Rmask,
 141                                                     image->format->Gmask,
 142                                                     image->format->Bmask,
 143                                                     image->format->Amask));
 144     if (!subimage)
 145     {
 146       throw std::runtime_error("SDL_CreateRGBSurfaceFrom() call failed");
 147     }
 148     else
 149     {
 150       if (image->format->palette)
 151       { // copy the image palette to subimage if present
 152         SDL_SetColors(subimage.get(), image->format->palette->colors, 0, image->format->palette->ncolors);
 153       }
 154
 155       return VideoSystem::new_texture(subimage.get());
 156     }
 157   }
 158 }
 159
 160 TexturePtr
 161 TextureManager::create_image_texture(const std::string& filename)
 162 {
 163   try
 164   {
 165     return create_image_texture_raw(filename);
 166   }
 167   catch (const std::exception& err)
 168   {
 169     log_warning << "Couldn't load texture '" << filename << "' (now using dummy texture): " << err.what() << std::endl;
 170     return create_dummy_texture();
 171   }
 172 }
 173
 174 TexturePtr
 175 TextureManager::create_image_texture_raw(const std::string& filename)
 176 {
 177   SDLSurfacePtr image(IMG_Load_RW(get_physfs_SDLRWops(filename), 1));
 178   if (!image)
 179   {
 180     std::ostringstream msg;
 181     msg << "Couldn't load image '" << filename << "' :" << SDL_GetError();
 182     throw std::runtime_error(msg.str());
 183   }
 184   else
 185   {
 186     return VideoSystem::new_texture(image.get());
 187   }
 188 }
 189
 190 TexturePtr
 191 TextureManager::create_dummy_texture()
 192 {
 193   const std::string dummy_texture_fname = "images/engine/missing.png";
 194
 195   // on error, try loading placeholder file
 196   try
 197   {
 198     TexturePtr tex = create_image_texture_raw(dummy_texture_fname);
 199     return tex;
 200   }
 201   catch (const std::exception& err)
 202   {
 203     // on error (when loading placeholder), try using empty surface,
 204     // when that fails to, just give up
 205     SDLSurfacePtr image(SDL_CreateRGBSurface(0, 1024, 1024, 8, 0, 0, 0, 0));
 206     if (!image)
 207     {
 208       throw err;
 209     }
 210     else
 211     {
 212       log_warning << "Couldn't load texture '" << dummy_texture_fname << "' (now using empty one): " << err.what() << std::endl;
 213       return VideoSystem::new_texture(image.get());
 214     }
 215   }
 216 }
 217
 218 #ifdef HAVE_OPENGL
 219 void
 220 TextureManager::save_textures()
 221 {
 222 #ifdef GL_PACK_ROW_LENGTH
 223   /* all this stuff is not support by OpenGL ES */
 224   glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 225   glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
 226   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
 227   glPixelStorei(GL_PACK_SKIP_ROWS, 0);
 228   glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
 229 #endif
 230
 231   glPixelStorei(GL_PACK_ALIGNMENT, 1);
 232   for(Textures::iterator i = textures.begin(); i != textures.end(); ++i) {
 233     save_texture(*i);
 234   }
 235   for(ImageTextures::iterator i = image_textures.begin();
 236       i != image_textures.end(); ++i) {
 237     save_texture(dynamic_cast<GLTexture*>(i->second.lock().get()));
 238   }
 239 }
 240
 241 void
 242 TextureManager::save_texture(GLTexture* texture)
 243 {
 244   SavedTexture saved_texture;
 245   saved_texture.texture = texture;
 246   glBindTexture(GL_TEXTURE_2D, texture->get_handle());
 247
 248   //this doesn't work with OpenGL ES (but we don't need it on the GP2X anyway)
 249 #ifndef GL_VERSION_ES_CM_1_0
 250   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH,
 251                            &saved_texture.width);
 252   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT,
 253                            &saved_texture.height);
 254   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BORDER,
 255                            &saved_texture.border);
 256   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 257                       &saved_texture.min_filter);
 258   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 259                       &saved_texture.mag_filter);
 260   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 261                       &saved_texture.wrap_s);
 262   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 263                       &saved_texture.wrap_t);
 264
 265   size_t pixelssize = saved_texture.width * saved_texture.height * 4;
 266   saved_texture.pixels = new char[pixelssize];
 267
 268   glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 269                 saved_texture.pixels);
 270 #endif
 271
 272   saved_textures.push_back(saved_texture);
 273
 274   glDeleteTextures(1, &(texture->get_handle()));
 275   texture->set_handle(0);
 276
 277   assert_gl("retrieving texture for save");
 278 }
 279
 280 void
 281 TextureManager::reload_textures()
 282 {
 283 #ifdef GL_UNPACK_ROW_LENGTH
 284   /* OpenGL ES doesn't support these */
 285   glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 286   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
 287   glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 288   glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 289   glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
 290 #endif
 291   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 292
 293   for(std::vector<SavedTexture>::iterator i = saved_textures.begin();
 294       i != saved_textures.end(); ++i) {
 295     SavedTexture& saved_texture = *i;
 296
 297     GLuint handle;
 298     glGenTextures(1, &handle);
 299     assert_gl("creating texture handle");
 300
 301     glBindTexture(GL_TEXTURE_2D, handle);
 302     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
 303                  saved_texture.width, saved_texture.height,
 304                  saved_texture.border, GL_RGBA,
 305                  GL_UNSIGNED_BYTE, saved_texture.pixels);
 306     delete[] saved_texture.pixels;
 307     assert_gl("uploading texture pixel data");
 308
 309     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 310                     saved_texture.min_filter);
 311     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 312                     saved_texture.mag_filter);
 313     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 314                     saved_texture.wrap_s);
 315     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 316                     saved_texture.wrap_t);
 317
 318     assert_gl("setting texture_params");
 319     saved_texture.texture->set_handle(handle);
 320   }
 321
 322   saved_textures.clear();
 323 }
 324 #endif
 325
 326 /* EOF */