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.TH "FcWeightFromOpenTypeDouble" "3" "15 May 2020" "Fontconfig 2.13.1" ""

.SH NAME
FcWeightFromOpenTypeDouble \- Convert from OpenType weight values to fontconfig ones
.SH SYNOPSIS
.sp
\fB#include <fontconfig/fontconfig.h>
.sp
double FcWeightFromOpenTypeDouble (double\fIot_weight\fB);
\fR
.SH "DESCRIPTION"
.PP
\fBFcWeightFromOpenTypeDouble\fR returns an double value
to use with FC_WEIGHT, from an double in the 1..1000 range, resembling
the numbers from OpenType specification's OS/2 usWeight numbers, which
are also similar to CSS font-weight numbers.  If input is negative,
zero, or greater than 1000, returns -1.  This function linearly doubleerpolates
between various FC_WEIGHT_* constants.  As such, the returned value does not
necessarily match any of the predefined constants.
.SH "SINCE"
.PP
version 2.12.92