/*
* Can first format be used where second is expected
*/
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 : (List<VertexFormatElement>) 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;
}
