Qtable(boolean wantLuma, float quality) {
elementPrecision = 0;
JPEGQTable base = null;
if (wantLuma) {
tableID = 0;
base = JPEGQTable.K1Div2Luminance;
} else {
tableID = 1;
base = JPEGQTable.K2Div2Chrominance;
}
if (quality != JPEG.DEFAULT_QUALITY) {
quality = JPEG.convertToLinearQuality(quality);
if (wantLuma) {
base = JPEGQTable.K1Luminance.getScaledInstance(quality, true);
} else {
base = JPEGQTable.K2Div2Chrominance.getScaledInstance(quality, true);
}
}
data = base.getTable();
}
Qtable(Node node) throws IIOInvalidTreeException {
if (node.getNodeName().equals("dqtable")) {
NamedNodeMap attrs = node.getAttributes();
int count = attrs.getLength();
if ((count < 1) || (count > 2)) {
throw new IIOInvalidTreeException("dqtable node must have 1 or 2 attributes", node);
}
elementPrecision = 0;
tableID = getAttributeValue(node, attrs, "qtableId", 0, 3, true);
if (node instanceof IIOMetadataNode) {
IIOMetadataNode ourNode = (IIOMetadataNode) node;
JPEGQTable table = (JPEGQTable) ourNode.getUserObject();
if (table == null) {
throw new IIOInvalidTreeException("dqtable node must have user object", node);
}
data = table.getTable();
} else {
throw new IIOInvalidTreeException("dqtable node must have user object", node);
}
} else {
throw new IIOInvalidTreeException("Invalid node, expected dqtable", node);
}
}
Qtable(JPEGQTable table, int id) {
elementPrecision = 0;
tableID = id;
data = table.getTable();
}
