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