| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| package rdpclient.rdp; |
| |
| import java.awt.image.IndexColorModel; |
| |
| import streamer.BaseElement; |
| import streamer.ByteBuffer; |
| import streamer.Link; |
| import common.ScreenDescription; |
| |
| /** |
| * @see http://msdn.microsoft.com/en-us/library/cc240623.aspx |
| */ |
| public class ServerPaletteUpdate extends BaseElement { |
| |
| public static final int UPDATETYPE_PALETTE = 0x0002; |
| protected ScreenDescription screen; |
| |
| public ServerPaletteUpdate(String id, ScreenDescription screen) { |
| super(id); |
| this.screen = screen; |
| } |
| |
| @Override |
| public void handleData(ByteBuffer buf, Link link) { |
| |
| if (verbose) |
| System.out.println("[" + this + "] INFO: Data received: " + buf + "."); |
| |
| // (2 bytes): A 16-bit, unsigned integer. The update type. This field MUST |
| // be set to UPDATETYPE_PALETTE (0x0002). |
| int updateType = buf.readUnsignedShortLE(); |
| if (updateType != UPDATETYPE_PALETTE) |
| throw new RuntimeException("Unexpected update type. Expected type: UPDATETYPE_PALETTE (0x0002), actual value: " + updateType + ", data: " + buf + "."); |
| |
| // pad2Octets (2 bytes): A 16-bit, unsigned integer. Padding. Values in this |
| // field MUST be ignored. |
| buf.skipBytes(2); |
| |
| // (4 bytes): A 32-bit, unsigned integer. The number of RGB triplets in the |
| // paletteData field. This field MUST be set to 256 (the number of entries |
| // in an 8 bpp palette). |
| int numberColors = (int)buf.readUnsignedIntLE(); |
| if (numberColors != 256) |
| throw new RuntimeException("Unexpected value for number of color field in server Palette Update packet. Expected value: 256 colors, actual value: " |
| + numberColors + ", data: " + buf + "."); |
| |
| // (variable): An array of palette entries in RGB triplet format packed on |
| // byte boundaries. The number of triplet entries is given by the |
| // numberColors field. |
| ByteBuffer paletteEntries = buf.readBytes(numberColors * 3); |
| |
| // In the case of a Palette Update, the client MUST update the global |
| // palette on all drawing surfaces |
| screen.colorMap = new IndexColorModel(8, numberColors, paletteEntries.data, paletteEntries.offset, false); |
| |
| /* DEBUG */buf.assertThatBufferIsFullyRead(); |
| |
| buf.unref(); |
| } |
| |
| } |