private void indexedColourLookUp(Chunk transparencyChunk) {
byte[] chunkData = transparencyChunk.getData().getArray();
int[] alphaValues = new int[chunkData.length];
for (int i = 0; i < chunkData.length; i++) {
alphaValues[i] = MASK & chunkData[i];
}
}
private void truecolorLookUp(Chunk transparencyChunk) {
byte[] chunkData = transparencyChunk.getData().getArray();
int[] transparentValue = new int[3];
for (int i = 0; i < transparentValue.length; i++) {
transparentValue[i] = ((MASK & chunkData[2 * i]) << 8) | chunkData[2 * i + 1];
}
}