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/* See LICENSE file for copyright and license details. */
#include "common.h"
/**
* Read information about a CRTC
*
* @param this Instance of a data structure to fill with the information about the CRTC
* @param size Should be `sizeof(*this)`, used to let the library know which version
* of the structure is used so that it does not write outside of it
* @param crtc The state of the CRTC whose information should be read
* @param fields OR:ed identifiers for the information about the CRTC that should be read
* @return Zero on success, -1 on error; on error refer to the error reports in `this`
*/
int
libgamma_get_crtc_information(libgamma_crtc_information_t *restrict this, size_t size,
libgamma_crtc_state_t *restrict crtc, unsigned long long fields)
{
libgamma_crtc_information_t info_;
int r, (*func)(libgamma_crtc_information_t *restrict, libgamma_crtc_state_t *restrict, unsigned long long);
this->edid = NULL;
this->connector_name = NULL;
switch (crtc->partition->site->method) {
#define X(CONST, CNAME, ...)\
case CONST:\
func = libgamma_##CNAME##_get_crtc_information;\
break;
LIST_AVAILABLE_METHODS(X)
#undef X
default:
return LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD;
}
if (size == sizeof(info_)) {
r = func(this, crtc, fields);
this->struct_version = LIBGAMMA_CRTC_INFORMATION_STRUCT_VERSION;
return r;
} else {
info_.struct_version = LIBGAMMA_CRTC_INFORMATION_STRUCT_VERSION;
r = func(&info_, crtc, fields);
if (size < sizeof(info_)) {
memcpy(this, &info_, size);
} else {
memcpy(this, &info_, sizeof(info_));
memset(&((char *)this)[size], 0, size - sizeof(info_));
}
return r;
}
}
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