if (stream == null) {
throw new IllegalStateException(I18N.getString("WBMPImageWriter3"));
}
if (image == null) {
throw new IllegalArgumentException(I18N.getString("WBMPImageWriter4"));
}
clearAbortRequest();
processImageStarted(0);
if (param == null)
param = getDefaultWriteParam();
RenderedImage input = null;
Raster inputRaster = null;
boolean writeRaster = image.hasRaster();
Rectangle sourceRegion = param.getSourceRegion();
SampleModel sampleModel = null;
if (writeRaster) {
inputRaster = image.getRaster();
sampleModel = inputRaster.getSampleModel();
} else {
input = image.getRenderedImage();
sampleModel = input.getSampleModel();
inputRaster = input.getData();
}
checkSampleModel(sampleModel);
if (sourceRegion == null)
sourceRegion = inputRaster.getBounds();
else
sourceRegion = sourceRegion.intersection(inputRaster.getBounds());
if (sourceRegion.isEmpty())
throw new RuntimeException(I18N.getString("WBMPImageWriter1"));
int scaleX = param.getSourceXSubsampling();
int scaleY = param.getSourceYSubsampling();
int xOffset = param.getSubsamplingXOffset();
int yOffset = param.getSubsamplingYOffset();
sourceRegion.translate(xOffset, yOffset);
sourceRegion.width -= xOffset;
sourceRegion.height -= yOffset;
int minX = sourceRegion.x / scaleX;
int minY = sourceRegion.y / scaleY;
int w = (sourceRegion.width + scaleX - 1) / scaleX;
int h = (sourceRegion.height + scaleY - 1) / scaleY;
Rectangle destinationRegion = new Rectangle(minX, minY, w, h);
sampleModel = sampleModel.createCompatibleSampleModel(w, h);
SampleModel destSM= sampleModel;
// If the data are not formatted nominally then reformat.
if(sampleModel.getDataType() != DataBuffer.TYPE_BYTE ||
!(sampleModel instanceof MultiPixelPackedSampleModel) ||
((MultiPixelPackedSampleModel)sampleModel).getDataBitOffset() != 0) {
destSM =
new MultiPixelPackedSampleModel(DataBuffer.TYPE_BYTE,
w, h, 1,
w + 7 >> 3, 0);
}
if (!destinationRegion.equals(sourceRegion)) {
if (scaleX == 1 && scaleY == 1)
inputRaster = inputRaster.createChild(inputRaster.getMinX(),
inputRaster.getMinY(),
w, h, minX, minY, null);
else {
WritableRaster ras = Raster.createWritableRaster(destSM,
new Point(minX, minY));
byte[] data = ((DataBufferByte)ras.getDataBuffer()).getData();
for(int j = minY, y = sourceRegion.y, k = 0;
j < minY + h; j++, y += scaleY) {
for (int i = 0, x = sourceRegion.x;
i <w; i++, x +=scaleX) {
int v = inputRaster.getSample(x, y, 0);
data[k + (i >> 3)] |= v << (7 - (i & 7));
}
k += w + 7 >> 3;
}
inputRaster = ras;
}
}
// If the data are not formatted nominally then reformat.
if(!destSM.equals(inputRaster.getSampleModel())) {
WritableRaster raster =
Raster.createWritableRaster(destSM,
new Point(inputRaster.getMinX(),
inputRaster.getMinY()));
raster.setRect(inputRaster);
inputRaster = raster;
}
// Check whether the image is white-is-zero.
boolean isWhiteZero = false;
if(!writeRaster && input.getColorModel() instanceof IndexColorModel) {
IndexColorModel icm = (IndexColorModel)input.getColorModel();
isWhiteZero = icm.getRed(0) > icm.getRed(1);
}
// Get the line stride, bytes per row, and data array.
int lineStride =
((MultiPixelPackedSampleModel)destSM).getScanlineStride();
int bytesPerRow = (w + 7)/8;
byte[] bdata = ((DataBufferByte)inputRaster.getDataBuffer()).getData();
// Write WBMP header.
stream.write(0); // TypeField
stream.write(0); // FixHeaderField
stream.write(intToMultiByte(w)); // width
stream.write(intToMultiByte(h)); // height
// Write the data.
if(!isWhiteZero && lineStride == bytesPerRow) {
// Write the entire image.
stream.write(bdata, 0, h * bytesPerRow);
processImageProgress(100.0F);
} else {
// Write the image row-by-row.
int offset = 0;
if(!isWhiteZero) {
// Black-is-zero
for(int row = 0; row < h; row++) {
if (abortRequested())
break;
stream.write(bdata, offset, bytesPerRow);
offset += lineStride;
processImageProgress(100.0F * row / h);
}
} else {
// White-is-zero: need to invert data.
byte[] inverted = new byte[bytesPerRow];
for(int row = 0; row < h; row++) {
if (abortRequested())
break;
for(int col = 0; col < bytesPerRow; col++) {
inverted[col] = (byte)(~(bdata[col+offset]));
}
stream.write(inverted, 0, bytesPerRow);
offset += lineStride;
processImageProgress(100.0F * row / h);
}
}
}
if (abortRequested())
processWriteAborted();
else {
processImageComplete();
stream.flushBefore(stream.getStreamPosition());
}
