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view src/main/java/com/glavsoft/drawing/ColorDecoder.java @ 0:4689cc86d6cb
create TreeViewer2 Repository
author | Yu Taninari <you@cr.ie.u-ryukyu.ac.jp> |
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date | Tue, 03 Jul 2012 13:20:49 +0900 |
parents | |
children | 17b702648079 |
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// Copyright (C) 2010, 2011 GlavSoft LLC. // All rights reserved. // //------------------------------------------------------------------------- // This file is part of the TightVNC software. Please visit our Web site: // // http://www.tightvnc.com/ // // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 2 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License along // with this program; if not, write to the Free Software Foundation, Inc., // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. //------------------------------------------------------------------------- // package com.glavsoft.drawing; import com.glavsoft.exceptions.TransportException; import com.glavsoft.rfb.encoding.PixelFormat; import com.glavsoft.transport.Reader; public class ColorDecoder { protected byte redShift; protected byte greenShift; protected byte blueShift; public short redMax; public short greenMax; public short blueMax; private final int bytesPerPixel; private final int bytesPerPixelSignificant; private final byte[] buff; private int startShift; private int startShiftCompact; private int addShiftItem; private final boolean isTightSpecific; public ColorDecoder(PixelFormat pf) { redShift = pf.redShift; greenShift = pf.greenShift; blueShift = pf.blueShift; redMax = pf.redMax; greenMax = pf.greenMax; blueMax = pf.blueMax; bytesPerPixel = pf.bitsPerPixel / 8; bytesPerPixelSignificant = 24 == pf.depth && 32 == pf.bitsPerPixel ? 3 : bytesPerPixel; buff = new byte[bytesPerPixel]; if (0 == pf.bigEndianFlag) { startShift = 0; startShiftCompact = 0; addShiftItem = 8; } else { startShift = pf.bitsPerPixel - 8; startShiftCompact = Math.max(0, pf.depth - 8); addShiftItem = -8; } isTightSpecific = 4==bytesPerPixel && 3==bytesPerPixelSignificant && 255 == redMax && 255 == greenMax && 255 == blueMax; } protected int readColor(Reader reader) throws TransportException { return getColor(reader.readBytes(buff, 0, bytesPerPixel), 0); } protected int readCompactColor(Reader reader) throws TransportException { return getCompactColor(reader.readBytes(buff, 0, bytesPerPixelSignificant), 0); } protected int readTightColor(Reader reader) throws TransportException { return getTightColor(reader.readBytes(buff, 0, bytesPerPixelSignificant), 0); } protected int convertColor(int rawColor) { return 255 * (rawColor >> redShift & redMax) / redMax << 16 | 255 * (rawColor >> greenShift & greenMax) / greenMax << 8 | 255 * (rawColor >> blueShift & blueMax) / blueMax; } public void fillRawComponents(byte[] comp, byte[] bytes, int offset) { int rawColor = getRawTightColor(bytes, offset); comp[0] = (byte) (rawColor >> redShift & redMax); comp[1] = (byte) (rawColor >> greenShift & greenMax); comp[2] = (byte) (rawColor >> blueShift & blueMax); } protected int getTightColor(byte[] bytes, int offset) { return convertColor(getRawTightColor(bytes, offset)); } private int getRawTightColor(byte[] bytes, int offset) { if (isTightSpecific) return (bytes[offset++] & 0xff)<<16 | (bytes[offset++] & 0xff)<<8 | bytes[offset++] & 0xff; else return getRawColor(bytes, offset); } protected int getColor(byte[] bytes, int offset) { return convertColor(getRawColor(bytes, offset)); } private int getRawColor(byte[] bytes, int offset) { int shift = startShift; int item = addShiftItem; int rawColor = (bytes[offset++] & 0xff)<<shift; for (int i=1; i<bytesPerPixel; ++i) { rawColor |= (bytes[offset++] & 0xff)<<(shift+=item); } return rawColor; } protected int getCompactColor(byte[] bytes, int offset) { int shift = startShiftCompact; int item = addShiftItem; int rawColor = (bytes[offset++] & 0xff)<<shift; for (int i=1; i<bytesPerPixelSignificant; ++i) { rawColor |= (bytes[offset++] & 0xff)<<(shift+=item); } return convertColor(rawColor); } }