glGetFragDataLocation — query the bindings of color numbers to user-defined varying out variables
|const char * name|
The name of the program containing varying out variable whose binding to query
The name of the user-defined varying out variable whose binding to query
glGetFragDataLocation retrieves the assigned color number binding for the user-defined
varying out variable
name for program
must have previously been linked.
name must be a null-terminated string. If
is not the name of an active user-defined varying out fragment shader variable within
program, -1 will
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