/**
* libgammamm -- C++ wrapper for libgamma
* Copyright (C) 2014 Mattias Andrée (maandree@member.fsf.org)
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "libgamma-facade.hh"
#include <cstdlib>
namespace libgamma
{
/**
* List available adjustment methods by their order of preference based on the environment.
*
* @param operation Allowed values:
* 0: Methods that the environment suggests will work, excluding fake.
* 1: Methods that the environment suggests will work, including fake.
* 2: All real non-fake methods.
* 3: All real methods.
* 4: All methods.
* Other values invoke undefined behaviour.
* @return Array of methods.
*/
std::vector<int> list_methods(int operation)
{
int* methods = (int*)malloc(LIBGAMMA_METHOD_COUNT * sizeof(int));
size_t n, i;
std::vector<int> rc;
n = libgamma_list_methods(methods, LIBGAMMA_METHOD_COUNT, operation);
if (n > LIBGAMMA_METHOD_COUNT)
{
free(methods);
methods = (int*)malloc(n * sizeof(int));
libgamma_list_methods(methods, n, operation);
}
for (i = 0; i < n; i++)
rc.push_back(methods[i]);
free(methods);
return rc;
}
/**
* Check whether an adjustment method is available, non-existing (invalid) methods will be
* identified as not available under the rationale that the library may be out of date.
*
* @param method The adjustment method.
* @return Whether the adjustment method is available.
*/
int is_method_available(int method)
{
return libgamma_is_method_available(method);
}
/**
* Return the capabilities of an adjustment method.
*
* @param output The data structure to fill with the method's capabilities,
* @param method The adjustment method (display server and protocol).
*/
void method_capabilities(MethodCapabilities* output, int method)
{
libgamma_method_capabilities_t caps;
libgamma_method_capabilities(&caps, method);
*output = MethodCapabilities(&caps);
}
/**
* Return the default site for an adjustment method.
*
* @param method The adjustment method (display server and protocol.)
* @return The default site, `nullptr` if it cannot be determined or if
* multiple sites are not supported by the adjustment method.
*/
std::string* method_default_site(int method)
{
char* cstr = libgamma_method_default_site(method);
if (cstr == nullptr)
return nullptr;
return new std::string(cstr);
}
/**
* Return the default variable that determines
* the default site for an adjustment method.
*
* @param method The adjustment method (display server and protocol.)
* @return The environ variables that is used to determine the
* default site. `nullptr` if there is none, that is, if
* the method does not support multiple sites.
* This value should not be `free`:d.
*/
std::string* method_default_site_variable(int method)
{
const char* cstr = libgamma_method_default_site_variable(method);
if (cstr == nullptr)
return nullptr;
return new std::string(cstr);
}
/**
* Convert a raw representation of an EDID to a lowercase hexadecimal representation.
*
* @param edid The EDID in raw representation.
* @param length The length of `edid`.
* @return The EDID in lowercase hexadecimal representation.
*/
std::string behex_edid(const unsigned char* edid, size_t length)
{
return behex_edid_lowercase(edid, length);
}
/**
* Convert a raw representation of an EDID to a lowercase hexadecimal representation.
*
* @param edid The EDID in raw representation.
* @param length The length of `edid`.
* @return The EDID in lowercase hexadecimal representation.
*/
std::string behex_edid_lowercase(const unsigned char* edid, size_t length)
{
char* cstr = libgamma_behex_edid_lowercase(edid, length);
std::string rc = std::string(cstr);
free(cstr);
return rc;
}
/**
* Convert a raw representation of an EDID to an uppercase hexadecimal representation.
*
* @param edid The EDID in raw representation.
* @param length The length of `edid`.
* @return The EDID in uppercase hexadecimal representation.
*/
std::string behex_edid_uppercase(const unsigned char* edid, size_t length)
{
char* cstr = libgamma_behex_edid_uppercase(edid, length);
std::string rc = std::string(cstr);
free(cstr);
return rc;
}
/**
* Convert an hexadecimal representation of an EDID to a raw representation.
*
* @param edid The EDID in hexadecimal representation.
* @return The EDID in raw representation, it will be half the length
* of `edid` (the input value).
*/
unsigned char* unhex_edid(const std::string edid)
{
const char* cstr = edid.c_str();
return libgamma_unhex_edid(cstr);
}
}
