var args as rect

gistfile1.txt

#define mgArgs(...) mgmgArgs_(__VA_ARGS__, MG_NONE)
int mgArgs_(const char* text, ...);

int mgText_(const char* text, struct MGargs args);

// Can "cache" args for common operations, as well as merge them, or use inline.

int mgColor(float* r, float* g, float* b, float* a, struct MGargs args)
{
  struct MGargs labelArgs = mgArgs(mgFontSize(LABEL_SIZE), mgSpacing(LABEL_SPACING));
  struct MGargs containerArgs = mgMergeArgs(args, mgArgs(mgAlign(MG_CENTER), mgSpacing(SPACING)); 
  mgDivBegin(MG_ROW, containerArgs);
  	mgText("R", labelArgs); mgNumber(r, mgGrow(1));
  	mgText("G", labelArgs); mgNumber(g, mgGrow(1));
  	mgText("B", labelArgs); mgNumber(b, mgGrow(1));
  	mgText("A", labelArgs); mgNumber(a, mgGrow(1));
  return mgDivEnd();
}