/** {@inheritDoc} */
@Override
public void write(GatheringByteChannel outputchannel) {
int numimages = numImages();
// Build header
ByteBuffer header = wsaheader.toByteBuffer();
// Build palette
ByteBuffer palette = wsapalette.toByteBuffer();
// Encode each frame, construct matching offsets
ByteBuffer[] frames = new ByteBuffer[isLooping() ? numimages + 1 : numimages];
ByteBuffer lastbytes =
com.mikeduvall.redhorizon.util.ByteBufferFactory.createLittleEndianByteBuffer(
width() * height());
ByteBuffer frameoffsets =
com.mikeduvall.redhorizon.util.ByteBufferFactory.createLittleEndianByteBuffer(
(numimages + 2) * 4);
int offsettotal = WsaFileHeaderCNC.HEADER_SIZE + ((numimages + 2) * 4);
for (int i = 0; i < frames.length; i++) {
ByteBuffer framebytes = wsaframes[i];
ByteBuffer frameint =
com.mikeduvall.redhorizon.util.ByteBufferFactory.createLittleEndianByteBuffer(
(int) (framebytes.capacity() * 1.5));
ByteBuffer frame =
com.mikeduvall.redhorizon.util.ByteBufferFactory.createLittleEndianByteBuffer(
(int) (framebytes.capacity() * 1.5));
// First encode in Format40, then Format80
CodecUtility.encodeFormat40(framebytes, frameint, lastbytes);
CodecUtility.encodeFormat80(frameint, frame);
frames[i] = frame;
lastbytes = framebytes;
frameoffsets.putInt(offsettotal);
offsettotal += frame.limit();
}
// Last offset for EOF
frameoffsets.putInt(offsettotal);
frameoffsets.rewind();
// Write file to disk
try {
outputchannel.write(header);
outputchannel.write(frameoffsets);
outputchannel.write(palette);
outputchannel.write(frames);
} catch (IOException e) {
throw new RuntimeException(e);
}
// Generate high-res colour lookup table
if (!srcnohires) {
// Figure-out the appropriate file name
String lookupname =
filename.contains(".")
? filename.substring(0, filename.lastIndexOf('.')) + ".pal"
: filename + ".pal";
// Write the index of the closest interpolated palette colour
// TODO: Perform proper colour interpolation
ByteBuffer lookup =
com.mikeduvall.redhorizon.util.ByteBufferFactory.createLittleEndianByteBuffer(256);
for (int i = 0; i < 256; i++) {
lookup.put((byte) i);
}
lookup.rewind();
try (FileChannel lookupfile = FileChannel.open(Paths.get(lookupname), WRITE)) {
for (int i = 0; i < 256; i++) {
lookupfile.write(lookup);
}
}
// TODO: Should be able to soften the auto-close without needing this
catch (IOException ex) {
throw new RuntimeException(ex);
}
}
}
