private static int getPictureBytesStartOffset(
int dataBlockStartOffset, byte[] _dataStream, int dataBlockSize) {
int realPicoffset = dataBlockStartOffset;
final int dataBlockEndOffset = dataBlockSize + dataBlockStartOffset;
// Skip over the PICT block
int PICTFBlockSize =
LittleEndian.getShort(
_dataStream, dataBlockStartOffset + PICT_HEADER_OFFSET); // Should be 68 bytes
// Now the PICTF1
int PICTF1BlockOffset = PICTFBlockSize + PICT_HEADER_OFFSET;
short MM_TYPE =
LittleEndian.getShort(_dataStream, dataBlockStartOffset + PICT_HEADER_OFFSET + 2);
if (MM_TYPE == 0x66) {
// Skip the stPicName
int cchPicName = LittleEndian.getUnsignedByte(_dataStream, PICTF1BlockOffset);
PICTF1BlockOffset += 1 + cchPicName;
}
int PICTF1BlockSize =
LittleEndian.getShort(_dataStream, dataBlockStartOffset + PICTF1BlockOffset);
int unknownHeaderOffset =
(PICTF1BlockSize + PICTF1BlockOffset) < dataBlockEndOffset
? (PICTF1BlockSize + PICTF1BlockOffset)
: PICTF1BlockOffset;
realPicoffset += (unknownHeaderOffset + UNKNOWN_HEADER_SIZE);
if (realPicoffset >= dataBlockEndOffset) {
realPicoffset -= UNKNOWN_HEADER_SIZE;
}
return realPicoffset;
}
void serialize(byte[] mainStream, int offset) {
LittleEndian.putShort(mainStream, offset, (short) _longs.length);
offset += LittleEndian.SHORT_SIZE;
for (int x = 0; x < _longs.length; x++) {
LittleEndian.putInt(mainStream, offset, _longs[x]);
offset += LittleEndian.INT_SIZE;
}
}
public FIBLongHandler(byte[] mainStream, int offset) {
int longCount = LittleEndian.getShort(mainStream, offset);
offset += LittleEndian.SHORT_SIZE;
_longs = new int[longCount];
for (int x = 0; x < longCount; x++) {
_longs[x] = LittleEndian.getInt(mainStream, offset + (x * LittleEndian.INT_SIZE));
}
}
/**
* For an existing set of text properties, build the list of properties coded for in a given run
* of properties.
*
* @return the number of bytes that were used encoding the properties list
*/
public int buildTextPropList(
int containsField, TextProp[] potentialProperties, byte[] data, int dataOffset) {
int bytesPassed = 0;
// For each possible entry, see if we match the mask
// If we do, decode that, save it, and shuffle on
for (int i = 0; i < potentialProperties.length; i++) {
// Check there's still data left to read
// Check if this property is found in the mask
if ((containsField & potentialProperties[i].getMask()) != 0) {
if (dataOffset + bytesPassed >= data.length) {
// Out of data, can't be any more properties to go
// remember the mask and return
maskSpecial |= potentialProperties[i].getMask();
return bytesPassed;
}
// Bingo, data contains this property
TextProp prop = (TextProp) potentialProperties[i].clone();
int val = 0;
if (prop.getSize() == 2) {
val = LittleEndian.getShort(data, dataOffset + bytesPassed);
} else if (prop.getSize() == 4) {
val = LittleEndian.getInt(data, dataOffset + bytesPassed);
} else if (prop.getSize() == 0) {
// remember "special" bits.
maskSpecial |= potentialProperties[i].getMask();
continue;
}
prop.setValue(val);
bytesPassed += prop.getSize();
textPropList.add(prop);
}
}
// Return how many bytes were used
return bytesPassed;
}
public Picture(int dataBlockStartOfsset, byte[] _dataStream, boolean fillBytes) {
this._dataStream = _dataStream;
this.dataBlockStartOfsset = dataBlockStartOfsset;
this.dataBlockSize = LittleEndian.getInt(_dataStream, dataBlockStartOfsset);
this.pictureBytesStartOffset =
getPictureBytesStartOffset(dataBlockStartOfsset, _dataStream, dataBlockSize);
this.size = dataBlockSize - (pictureBytesStartOffset - dataBlockStartOfsset);
if (size < 0) {}
this.aspectRatioX = extractAspectRatioX(_dataStream, dataBlockStartOfsset);
this.aspectRatioY = extractAspectRatioY(_dataStream, dataBlockStartOfsset);
if (fillBytes) {
fillImageContent();
}
}
private static int extractAspectRatioY(byte[] _dataStream, int dataBlockStartOffset) {
return LittleEndian.getShort(_dataStream, dataBlockStartOffset + 0x22) / 10;
}