src/framework/shadermanager.cpp

   1 /*
   2  * Copyright (c) 2007-2013, Czirkos Zoltan http://code.google.com/p/gdash/
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining
   5  * a copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sublicense, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  18  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
  19  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
  20  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  21  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include "config.h"
  25
  26 #include <glib.h>
  27
  28 #include "misc/logger.hpp"
  29 #include "misc/printf.hpp"
  30 #include "misc/autogfreeptr.hpp"
  31 #include "framework/shadermanager.hpp"
  32 #include "settings.hpp"
  33
  34
  35 static void add_dir_to_shaders(std::vector<std::string> &shaders, const char *directory_name) {
  36     gd_debug(CPrintf("checking dir %s for shaders") % directory_name);
  37
  38     GDir *dir = g_dir_open(directory_name, 0, NULL);
  39     /* silently ignore unable-to-open directories */
  40     if (!dir)
  41         return;
  42     char const *name;
  43     while ((name = g_dir_read_name(dir)) != NULL) {
  44         AutoGFreePtr<char> filename(g_build_filename(directory_name, name, NULL));
  45         AutoGFreePtr<char> lower(g_ascii_strdown(filename, -1));
  46         if ((g_str_has_suffix(lower, ".shader") && g_file_test(filename, G_FILE_TEST_IS_REGULAR))) {
  47             gd_debug(CPrintf("found shader %s") % filename);
  48             shaders.push_back((char*) filename);
  49         }
  50     }
  51     g_dir_close(dir);
  52 }
  53
  54
  55 /* will create a list of file names which can be used as themes. */
  56 /* the first item will be an empty string to represent the default, built-in theme. */
  57 void load_shaders_list(std::vector<std::string> &shaders, int &shadernum) {
  58     shaders.clear();
  59
  60     shaders.push_back("");    /* this symbolizes the empty shader */
  61     for (unsigned i = 0; i < gd_shaders_dirs.size(); ++i)
  62         add_dir_to_shaders(shaders, gd_shaders_dirs[i].c_str());
  63
  64     /* find the current shader. */
  65     std::vector<std::string>::iterator it =
  66         find(shaders.begin(), shaders.end(), gd_shader);
  67     /* if the current shader is not in the list, put it into the list */
  68     if (it == shaders.end()) {
  69         shaders.push_back(gd_shader);
  70         shadernum = shaders.size() - 1;
  71     } else {
  72         shadernum = it - shaders.begin();
  73     }
  74 }