150 lines
3.0 KiB
Java
150 lines
3.0 KiB
Java
/*
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*
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* Copyright (C) 2003 Kent Hansen.
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*
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* This file is part of Tile Mangler.
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*
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* Tile Mangler is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Tile Mangler is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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package tm.tilecodecs;
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/**
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*
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* Abstract class for 8x8 ("atomic") tile codecs.
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* To add a new tile format, simply extend this class and implement decode() and encode().
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*
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**/
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public abstract class TileCodec {
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public static final int MODE_1D=1;
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public static final int MODE_2D=2;
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private String id;
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private String description;
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protected int[] pixels; // destination for DEcoded tile data
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protected int bitsPerPixel;
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protected int bytesPerRow; // row = 8 pixels
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protected long colorCount;
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protected int tileSize; // size of one encoded tile
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/**
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*
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* Constructor. Every subclass must call this with argument bitsPerPixel.
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*
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* @param bitsPerPixel Duh!
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*
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**/
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public TileCodec(String id, int bitsPerPixel, String description) {
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this.id = id;
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this.bitsPerPixel = bitsPerPixel;
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this.description = description;
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bytesPerRow = bitsPerPixel; // because (bitsPerPixel*8)/8 = bitsPerPixel
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tileSize = bytesPerRow*8;
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colorCount = 1 << bitsPerPixel;
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pixels = new int[8*8];
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}
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/**
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*
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* Decodes a tile.
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*
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* @param bits An array of encoded tile data
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* @param ofs Start offset of tile in bits array
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*
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**/
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public abstract int[] decode(byte[] bits, int ofs, int stride);
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/**
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*
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* Encodes a tile.
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*
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* @param pixels An array of decoded tile data
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*
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**/
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public abstract void encode(int[] pixels, byte[] bits, int ofs, int stride);
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/**
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*
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* Gets the # of bits per pixel for the tile format.
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*
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**/
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public int getBitsPerPixel() {
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return bitsPerPixel;
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}
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/**
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*
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* Gets the # of bytes per row (8 pixels) for the tile format.
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*
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**/
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public int getBytesPerRow() {
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return bytesPerRow;
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}
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/**
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*
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*
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*
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**/
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/*
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public long getColorCount() {
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return colorCount;
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}
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*/
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// TEMP!!!!!!!!!!
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public int getColorCount() {
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if (bitsPerPixel < 8) return (1 << bitsPerPixel);
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return 256;
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}
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/**
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*
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* Gets the size in bytes of one tile encoded in this format.
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*
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**/
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public int getTileSize() {
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return tileSize;
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}
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/**
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*
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* Gets the description of the codec.
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*
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**/
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public String getDescription() {
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return description;
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}
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/**
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*
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* Gets the codec id.
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*
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**/
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public String getID() {
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return id;
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}
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public String toString() {
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return description;
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}
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} |