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.lock())
  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     image_textures[filename] = texture;
  71   }
  72
  73   return texture;
  74 }
  75
  76 TexturePtr
  77 TextureManager::get(const std::string& filename, const Rect& rect)
  78 {
  79   // FIXME: implement caching
  80   return create_image_texture(filename, rect);
  81 }
  82
  83 void
  84 TextureManager::release(Texture* texture)
  85 {
  86   image_textures.erase(texture->get_filename());
  87 }
  88
  89 #ifdef HAVE_OPENGL
  90 void
  91 TextureManager::register_texture(GLTexture* texture)
  92 {
  93   textures.insert(texture);
  94 }
  95
  96 void
  97 TextureManager::remove_texture(GLTexture* texture)
  98 {
  99   textures.erase(texture);
 100 }
 101 #endif
 102
 103 TexturePtr
 104 TextureManager::create_image_texture(const std::string& filename, const Rect& rect)
 105 {
 106   try
 107   {
 108     return create_image_texture_raw(filename, rect);
 109   }
 110   catch(const std::exception& err)
 111   {
 112     log_warning << "Couldn't load texture '" << filename << "' (now using dummy texture): " << err.what() << std::endl;
 113     TexturePtr texture = create_dummy_texture();
 114     return texture;
 115   }
 116 }
 117
 118 TexturePtr
 119 TextureManager::create_image_texture_raw(const std::string& filename, const Rect& rect)
 120 {
 121   SDLSurfacePtr image(IMG_Load_RW(get_physfs_SDLRWops(filename), 1));
 122   if (!image)
 123   {
 124     std::ostringstream msg;
 125     msg << "Couldn't load image '" << filename << "' :" << SDL_GetError();
 126     throw std::runtime_error(msg.str());
 127   }
 128   else
 129   {
 130     SDLSurfacePtr subimage(SDL_CreateRGBSurfaceFrom(static_cast<uint8_t*>(image->pixels) +
 131                                                     rect.top * image->pitch +
 132                                                     rect.left * image->format->BytesPerPixel,
 133
 134                                                     rect.get_width(), rect.get_height(),
 135                                                     image->format->BitsPerPixel,
 136                                                     image->pitch,
 137                                                     image->format->Rmask,
 138                                                     image->format->Gmask,
 139                                                     image->format->Bmask,
 140                                                     image->format->Amask));
 141     if (!subimage)
 142     {
 143       throw std::runtime_error("SDL_CreateRGBSurfaceFrom() call failed");
 144     }
 145     else
 146     {
 147       if (image->format->palette)
 148       { // copy the image palette to subimage if present
 149         SDL_SetColors(subimage.get(), image->format->palette->colors, 0, image->format->palette->ncolors);
 150       }
 151
 152       TexturePtr result = VideoSystem::new_texture(subimage.get());
 153       result->set_filename(filename);
 154       return result;
 155     }
 156   }
 157 }
 158
 159 TexturePtr
 160 TextureManager::create_image_texture(const std::string& filename)
 161 {
 162   try
 163   {
 164     return create_image_texture_raw(filename);
 165   }
 166   catch (const std::exception& err)
 167   {
 168     log_warning << "Couldn't load texture '" << filename << "' (now using dummy texture): " << err.what() << std::endl;
 169     TexturePtr texture = create_dummy_texture();
 170     return 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     TexturePtr result = VideoSystem::new_texture(image.get());
 187     result->set_filename(filename);
 188     return result;
 189   }
 190 }
 191
 192 TexturePtr
 193 TextureManager::create_dummy_texture()
 194 {
 195   const std::string dummy_texture_fname = "images/engine/missing.png";
 196
 197   // on error, try loading placeholder file
 198   try
 199   {
 200     TexturePtr tex = create_image_texture_raw(dummy_texture_fname);
 201     return tex;
 202   }
 203   catch (const std::exception& err)
 204   {
 205     // on error (when loading placeholder), try using empty surface,
 206     // when that fails to, just give up
 207     SDLSurfacePtr image(SDL_CreateRGBSurface(0, 1024, 1024, 8, 0, 0, 0, 0));
 208     if (!image)
 209     {
 210       throw err;
 211     }
 212     else
 213     {
 214       TexturePtr result = VideoSystem::new_texture(image.get());
 215       result->set_filename("-dummy-texture-.png");
 216       log_warning << "Couldn't load texture '" << dummy_texture_fname << "' (now using empty one): " << err.what() << std::endl;
 217       return result;
 218     }
 219   }
 220 }
 221
 222 #ifdef HAVE_OPENGL
 223 void
 224 TextureManager::save_textures()
 225 {
 226 #ifdef GL_PACK_ROW_LENGTH
 227   /* all this stuff is not support by OpenGL ES */
 228   glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 229   glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
 230   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
 231   glPixelStorei(GL_PACK_SKIP_ROWS, 0);
 232   glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
 233 #endif
 234
 235   glPixelStorei(GL_PACK_ALIGNMENT, 1);
 236   for(Textures::iterator i = textures.begin(); i != textures.end(); ++i) {
 237     save_texture(*i);
 238   }
 239   for(ImageTextures::iterator i = image_textures.begin();
 240       i != image_textures.end(); ++i) {
 241     save_texture(dynamic_cast<GLTexture*>(i->second.lock().get()));
 242   }
 243 }
 244
 245 void
 246 TextureManager::save_texture(GLTexture* texture)
 247 {
 248   SavedTexture saved_texture;
 249   saved_texture.texture = texture;
 250   glBindTexture(GL_TEXTURE_2D, texture->get_handle());
 251
 252   //this doesn't work with OpenGL ES (but we don't need it on the GP2X anyway)
 253 #ifndef GL_VERSION_ES_CM_1_0
 254   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH,
 255                            &saved_texture.width);
 256   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT,
 257                            &saved_texture.height);
 258   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BORDER,
 259                            &saved_texture.border);
 260   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 261                       &saved_texture.min_filter);
 262   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 263                       &saved_texture.mag_filter);
 264   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 265                       &saved_texture.wrap_s);
 266   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 267                       &saved_texture.wrap_t);
 268
 269   size_t pixelssize = saved_texture.width * saved_texture.height * 4;
 270   saved_texture.pixels = new char[pixelssize];
 271
 272   glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 273                 saved_texture.pixels);
 274 #endif
 275
 276   saved_textures.push_back(saved_texture);
 277
 278   glDeleteTextures(1, &(texture->get_handle()));
 279   texture->set_handle(0);
 280
 281   assert_gl("retrieving texture for save");
 282 }
 283
 284 void
 285 TextureManager::reload_textures()
 286 {
 287 #ifdef GL_UNPACK_ROW_LENGTH
 288   /* OpenGL ES doesn't support these */
 289   glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 290   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
 291   glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 292   glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 293   glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
 294 #endif
 295   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 296
 297   for(std::vector<SavedTexture>::iterator i = saved_textures.begin();
 298       i != saved_textures.end(); ++i) {
 299     SavedTexture& saved_texture = *i;
 300
 301     GLuint handle;
 302     glGenTextures(1, &handle);
 303     assert_gl("creating texture handle");
 304
 305     glBindTexture(GL_TEXTURE_2D, handle);
 306     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
 307                  saved_texture.width, saved_texture.height,
 308                  saved_texture.border, GL_RGBA,
 309                  GL_UNSIGNED_BYTE, saved_texture.pixels);
 310     delete[] saved_texture.pixels;
 311     assert_gl("uploading texture pixel data");
 312
 313     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 314                     saved_texture.min_filter);
 315     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 316                     saved_texture.mag_filter);
 317     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 318                     saved_texture.wrap_s);
 319     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 320                     saved_texture.wrap_t);
 321
 322     assert_gl("setting texture_params");
 323     saved_texture.texture->set_handle(handle);
 324   }
 325
 326   saved_textures.clear();
 327 }
 328 #endif
 329
 330 /* EOF */