/**
* Return the closest compatible {@link IcyColorModel} supported by writer from the specified
* image description.<br>
* That means the writer is able to save the data described by the returned {@link IcyColorModel}
* without any loss or conversion.<br>
*
* @param writer IFormatWriter we want to test compatibility
* @param numChannel number of channel of the image
* @param dataType image data type
*/
public static IcyColorModel getCompatibleColorModel(
IFormatWriter writer, int numChannel, DataType dataType) {
final DataType outDataType;
final int outNumChannel;
if (writer instanceof OMETiffWriter) {
// TIFF supports all formats
outDataType = dataType;
outNumChannel = numChannel;
} else if (writer instanceof APNGWriter) {
// PNG only supports byte and short data type
if (dataType.getSize() > 2) outDataType = DataType.USHORT;
else outDataType = dataType;
// PNG supports a maximum of 4 channels
outNumChannel = Math.min(numChannel, 4);
} else {
// JPG, AVI, default only supports byte data type
if (dataType.getSize() > 1) outDataType = DataType.UBYTE;
else outDataType = dataType;
// 3 channels at max
if (numChannel > 3) outNumChannel = 3;
else {
// special case of 2 channels
if (numChannel == 2)
// convert to RGB
outNumChannel = 3;
else outNumChannel = numChannel;
}
}
return IcyColorModel.createInstance(outNumChannel, outDataType);
}
/** Return the separate channel flag from specified writer and color space */
private static boolean getSeparateChannelFlag(IFormatWriter writer, IcyColorModel colorModel) {
return getSeparateChannelFlag(writer, colorModel.getNumComponents(), colorModel.getDataType_());
}
/**
* Return true if the specified writer is compatible with the specified {@link IcyColorModel}.
* <br>
* That means the writer is able to save the data described by the colorModel without any loss or
* conversion.<br>
* The color map data are never preserved, they are always restored to their default.<br>
*/
public static boolean isCompatible(IFormatWriter writer, IcyColorModel colorModel) {
return colorModel.isCompatible(getCompatibleColorModel(writer, colorModel));
}
/**
* Return true if the specified writer is compatible with the image description.<br>
* That means the writer is able to save the data without any loss or conversion.<br>
*
* @param numChannel number of channel of the image
* @param alpha true if the image has an alpha channel
* @param dataType image data type
*/
public static boolean isCompatible(
IFormatWriter writer, int numChannel, boolean alpha, DataType dataType) {
return isCompatible(writer, IcyColorModel.createInstance(numChannel, dataType));
}
/**
* Return the closest compatible {@link IcyColorModel} supported by writer from the specified
* {@link IcyColorModel}.<br>
* That means the writer is able to save the data described by the returned {@link IcyColorModel}
* without any loss or conversion.<br>
*
* @param writer IFormatWriter we want to test compatibility
* @param colorModel the colorModel describing data / image format
*/
public static IcyColorModel getCompatibleColorModel(
IFormatWriter writer, IcyColorModel colorModel) {
return getCompatibleColorModel(
writer, colorModel.getNumComponents(), colorModel.getDataType_());
}
