54 lines
1.6 KiB
Java
54 lines
1.6 KiB
Java
package com.bytezone.diskbrowser.applefile;
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// -----------------------------------------------------------------------------------//
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public class FaddenHiResImage extends OriginalHiResImage
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// -----------------------------------------------------------------------------------//
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{
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// https://github.com/fadden/fhpack/blob/master/fhpack.cpp
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// ---------------------------------------------------------------------------------//
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public FaddenHiResImage (String name, byte[] buffer, int fileType, int auxType,
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int endOfFile)
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// ---------------------------------------------------------------------------------//
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{
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super (name, buffer, fileType, auxType, endOfFile);
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assert buffer[0] == 0x66;
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this.buffer = new byte[0x2000];
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int outPtr = 0;
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int ptr = 1;
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while (ptr < buffer.length)
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{
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int literalLen = (buffer[ptr] & 0xF0) >>> 4;
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int matchLen = (buffer[ptr++] & 0x0F) + 4;
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if (literalLen == 15)
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literalLen = (buffer[ptr++] & 0xFF) + 15;
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if (literalLen > 0)
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{
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System.arraycopy (buffer, ptr, this.buffer, outPtr, literalLen);
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ptr += literalLen;
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outPtr += literalLen;
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}
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if (matchLen == 19) // 15 + 4
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{
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matchLen = (buffer[ptr++] & 0xFF);
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if (matchLen == 254) // eof
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break;
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if (matchLen == 253) // no match
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continue;
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matchLen += 19;
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}
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int offset = (buffer[ptr++] & 0xFF) | ((buffer[ptr++] & 0xFF) << 8);
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while (matchLen-- > 0)
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this.buffer[outPtr++] = this.buffer[offset++];
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}
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createImage ();
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}
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}
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