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1 package com.imagero.uio.io;
2 import java.io.IOException  ;
3 import java.io.InputStream ;
4
5
8 public class TargaRLEInputStream extends RLEInputStream {
9
10 int numSamples;
11 byte [] value;
12 boolean rawPacket;
13 int pixelSize;
14 int vindex;
15
16 public TargaRLEInputStream(InputStream in, int pixelSize) {
17 super(in);
18 this.pixelSize = pixelSize;
19 value = new byte[pixelSize];
20 }
21
22 public int read() throws IOException {
23 if (numSamples == 0) {
24 int v = in.read();
25 if(v == -1) {
26 return -1;
27 }
28 if ((v >> 7) == 1) {
29 for (int i = 0; i < value.length; i++) {
30 value[i] = (byte) in.read();
31 }
32 numSamples = ((v & 0x7F) + 1) * pixelSize;
33 rawPacket = false;
34 }
35 else {
36 numSamples = (v + 1) * pixelSize;
37 rawPacket = true;
38 }
39 }
40 numSamples--;
41 if (rawPacket) {
42 return in.read();
43 }
44 else {
45 int b = value[vindex++] & 0xFF;
46 if(vindex == pixelSize) {
47 vindex = 0;
48 }
49 return b;
50 }
51 }
52 }
53
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