74fd618df9
This adds two new configuration environment variables: COGL_DISABLE_GL_EXTENSIONS and COGL_OVERRIDE_GL_VERSION The variables can also be set in the cogl.conf file using the same names. The first one is a list of GL extension names separated by commas. When set Cogl will assume any extension listed here is not available by removing it from the string returned from glGetString(GL_EXTENSIONS). If the string is set in both the config file and the environment variable then the union of the two lists will be used. The second overrides the value returned from glGetString(GL_VERSION). If the string is set in both places the version from the environment variable will take priority. These are sometimes useful for debugging Cogl to test the various combinations of extensions. It could also be useful to work around driver bugs where an extension is badly supported and it would be better not to use it. The variables in cogl-config that just set a global char * variable have been put together in an array instead of having a separate blob of code for each one in order to make it simpler to add new variables. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit ec69c2dc576c78664e0b73879365cb7414ecf441)
129 lines
3.6 KiB
C
129 lines
3.6 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2011 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*
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* Authors:
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* Robert Bragg <robert@linux.intel.com>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl-debug.h"
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#include "cogl-config-private.h"
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#include <glib.h>
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char *_cogl_config_driver;
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char *_cogl_config_renderer;
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char *_cogl_config_disable_gl_extensions;
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char *_cogl_config_override_gl_version;
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/* Array of config options that just set a global string */
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static const struct
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{
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const char *conf_name;
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char **variable;
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} cogl_config_string_options[] =
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{
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{ "COGL_DRIVER", &_cogl_config_driver },
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{ "COGL_RENDERER", &_cogl_config_renderer },
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{ "COGL_DISABLE_GL_EXTENSIONS", &_cogl_config_disable_gl_extensions },
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{ "COGL_OVERRIDE_GL_VERSION", &_cogl_config_override_gl_version }
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};
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static void
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_cogl_config_process (GKeyFile *key_file)
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{
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char *value;
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int i;
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value = g_key_file_get_string (key_file, "global", "COGL_DEBUG", NULL);
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if (value)
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{
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_cogl_parse_debug_string (value,
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TRUE /* enable the flags */,
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TRUE /* ignore help option */);
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g_free (value);
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}
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value = g_key_file_get_string (key_file, "global", "COGL_NO_DEBUG", NULL);
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if (value)
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{
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_cogl_parse_debug_string (value,
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FALSE /* disable the flags */,
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TRUE /* ignore help option */);
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g_free (value);
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}
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for (i = 0; i < G_N_ELEMENTS (cogl_config_string_options); i++)
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{
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const char *conf_name = cogl_config_string_options[i].conf_name;
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char **variable = cogl_config_string_options[i].variable;
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value = g_key_file_get_string (key_file, "global", conf_name, NULL);
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if (value)
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{
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g_free (*variable);
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*variable = value;
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}
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}
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}
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void
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_cogl_config_read (void)
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{
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GKeyFile *key_file = g_key_file_new ();
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const char * const *system_dirs = g_get_system_config_dirs ();
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char *filename;
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CoglBool status = FALSE;
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int i;
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for (i = 0; system_dirs[i]; i++)
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{
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filename = g_build_filename (system_dirs[i], "cogl", "cogl.conf", NULL);
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status = g_key_file_load_from_file (key_file,
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filename,
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0,
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NULL);
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g_free (filename);
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if (status)
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{
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_cogl_config_process (key_file);
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g_key_file_free (key_file);
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key_file = g_key_file_new ();
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break;
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}
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}
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filename = g_build_filename (g_get_user_config_dir (), "cogl", "cogl.conf", NULL);
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status = g_key_file_load_from_file (key_file,
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filename,
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0,
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NULL);
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g_free (filename);
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if (status)
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_cogl_config_process (key_file);
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g_key_file_free (key_file);
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}
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