73 lines
2.4 KiB
Java
73 lines
2.4 KiB
Java
package com.bytezone.diskbrowser.applefile;
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import java.awt.image.DataBuffer;
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import com.bytezone.diskbrowser.utilities.HexFormatter;
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// see graffidisk.v1.0.2mg
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// -----------------------------------------------------------------------------------//
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public class CharacterRom extends CharacterList
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// -----------------------------------------------------------------------------------//
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{
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private static final int charsX = 16;
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private static final int HEADER_LENGTH = 0x100;
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String description;
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// ---------------------------------------------------------------------------------//
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public CharacterRom (String name, byte[] buffer)
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// ---------------------------------------------------------------------------------//
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{
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super (name, buffer);
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description = HexFormatter.getCString (buffer, 16);
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int ptr = HEADER_LENGTH;
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while (ptr < buffer.length)
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{
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characters.add (new CharacterRomCharacter (buffer, ptr));
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ptr += sizeY;
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}
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buildImage (borderX, borderY, gapX, gapY, sizeX, sizeY, charsX);
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}
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// ---------------------------------------------------------------------------------//
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public static boolean isRom (byte[] buffer)
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// ---------------------------------------------------------------------------------//
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{
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if (buffer.length != 0x400)
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return false;
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// see CHARROM.S on graffidisk
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// BD 41 53 10 A0 07 08
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return buffer[0] == (byte) 0xBD && buffer[1] == (byte) 0x41
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&& buffer[2] == (byte) 0x53 && buffer[4] == (byte) 0xA0
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&& buffer[5] == (byte) 0x07 && buffer[6] == (byte) 0x08;
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}
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// ---------------------------------------------------------------------------------//
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class CharacterRomCharacter extends Character
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// ---------------------------------------------------------------------------------//
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{
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// -------------------------------------------------------------------------------//
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public CharacterRomCharacter (byte[] buffer, int ptr)
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// -------------------------------------------------------------------------------//
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{
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super (sizeX, sizeY);
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DataBuffer dataBuffer = image.getRaster ().getDataBuffer ();
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int element = 0;
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for (int i = 0; i < sizeY; i++)
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{
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int value = buffer[ptr++] & 0xFF;
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for (int j = 0; j < sizeX; j++)
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{
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dataBuffer.setElem (element++, (value & 0x80) == 0 ? 0 : 0xFF);
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value <<= 1;
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}
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}
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}
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}
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} |