ICCMarkerSegment(JPEGBuffer buffer) throws IOException {
super(buffer); // gets whole segment or fills the buffer
if (debug) {
System.out.println("Creating new ICC segment");
}
buffer.bufPtr += ID_SIZE; // Skip the id
buffer.bufAvail -= ID_SIZE;
/*
* Reduce the stored length by the id size. The stored
* length is used to store the length of the profile
* data only.
*/
length -= ID_SIZE;
// get the chunk number
int chunkNum = buffer.buf[buffer.bufPtr] & 0xff;
// get the total number of chunks
numChunks = buffer.buf[buffer.bufPtr + 1] & 0xff;
if (chunkNum > numChunks) {
throw new IIOException("Image format Error; chunk num > num chunks");
}
// if there are no more chunks, set up the data
if (numChunks == 1) {
// reduce the stored length by the two chunk numbering bytes
length -= 2;
profile = new byte[length];
buffer.bufPtr += 2;
buffer.bufAvail -= 2;
buffer.readData(profile);
inICC = false;
} else {
// If we store them away, include the chunk numbering bytes
byte[] profileData = new byte[length];
// Now reduce the stored length by the
// two chunk numbering bytes
length -= 2;
buffer.readData(profileData);
chunks = new ArrayList();
chunks.add(profileData);
chunksRead = 1;
inICC = true;
}
}
/* */ void loadData(JPEGBuffer paramJPEGBuffer) /* */ throws IOException /* */ {
/* 127 */ this.data = new byte[this.length];
/* 128 */ paramJPEGBuffer.readData(this.data);
/* */ }
boolean addData(JPEGBuffer buffer) throws IOException {
if (debug) {
System.out.println("Adding to ICC segment");
}
// skip the tag
buffer.bufPtr++;
buffer.bufAvail--;
// Get the length, but not in length
int dataLen = (buffer.buf[buffer.bufPtr++] & 0xff) << 8;
dataLen |= buffer.buf[buffer.bufPtr++] & 0xff;
buffer.bufAvail -= 2;
// Don't include length itself
dataLen -= 2;
// skip the id
buffer.bufPtr += ID_SIZE; // Skip the id
buffer.bufAvail -= ID_SIZE;
/*
* Reduce the stored length by the id size. The stored
* length is used to store the length of the profile
* data only.
*/
dataLen -= ID_SIZE;
// get the chunk number
int chunkNum = buffer.buf[buffer.bufPtr] & 0xff;
if (chunkNum > numChunks) {
throw new IIOException("Image format Error; chunk num > num chunks");
}
// get the number of chunks, which should match
int newNumChunks = buffer.buf[buffer.bufPtr + 1] & 0xff;
if (numChunks != newNumChunks) {
throw new IIOException("Image format Error; icc num chunks mismatch");
}
dataLen -= 2;
if (debug) {
System.out.println(
"chunkNum: " + chunkNum + ", numChunks: " + numChunks + ", dataLen: " + dataLen);
}
boolean retval = false;
byte[] profileData = new byte[dataLen];
buffer.readData(profileData);
chunks.add(profileData);
length += dataLen;
chunksRead++;
if (chunksRead < numChunks) {
inICC = true;
} else {
if (debug) {
System.out.println("Completing profile; total length is " + length);
}
// create an array for the whole thing
profile = new byte[length];
// copy the existing chunks, releasing them
// Note that they may be out of order
int index = 0;
for (int i = 1; i <= numChunks; i++) {
boolean foundIt = false;
for (int chunk = 0; chunk < chunks.size(); chunk++) {
byte[] chunkData = (byte[]) chunks.get(chunk);
if (chunkData[0] == i) { // Right one
System.arraycopy(chunkData, 2, profile, index, chunkData.length - 2);
index += chunkData.length - 2;
foundIt = true;
}
}
if (foundIt == false) {
throw new IIOException("Image Format Error: Missing ICC chunk num " + i);
}
}
chunks = null;
chunksRead = 0;
numChunks = 0;
inICC = false;
retval = true;
}
return retval;
}
