Attributes.java 文件源码

public static boolean moreSpecific(VertexFormat first, VertexFormat second)
{
    int size = first.getNextOffset();
    if(size != second.getNextOffset()) return false;

    int padding = 0;
    int j = 0;
    for(VertexFormatElement firstAttr : first.getElements())
    {
        while(j < second.getElementCount() && second.getElement(j).getUsage() == EnumUsage.PADDING)
        {
            padding += second.getElement(j++).getSize();
        }
        if(j >= second.getElementCount() && padding == 0)
        {
            // if no padding is left, but there are still elements in first (we're processing one) - it doesn't fit
            return false;
        }
        if(padding == 0)
        {
            // no padding - attributes have to match
            VertexFormatElement secondAttr = second.getElement(j++);
            if(
                firstAttr.getIndex() != secondAttr.getIndex() ||
                firstAttr.getElementCount() != secondAttr.getElementCount() ||
                firstAttr.getType() != secondAttr.getType() ||
                firstAttr.getUsage() != secondAttr.getUsage())
            {
                return false;
            }
        }
        else
        {
            // padding - attribute should fit in it
            padding -= firstAttr.getSize();
            if(padding < 0) return false;
        }
    }

    if(padding != 0 || j != second.getElementCount()) return false;
    return true;
}