| /* |
| * 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 org.apache.commons.sanselan.formats.pnm; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.apache.commons.sanselan.ImageFormat; |
| import org.apache.commons.sanselan.ImageInfo; |
| |
| public class PbmFileInfo extends FileInfo |
| { |
| public PbmFileInfo(int width, int height, boolean RAWBITS) |
| { |
| super(width, height, RAWBITS); |
| } |
| |
| @Override |
| public int getNumComponents() |
| { |
| return 1; |
| } |
| |
| @Override |
| public int getBitDepth() |
| { |
| return 1; |
| } |
| |
| @Override |
| public ImageFormat getImageType() |
| { |
| return ImageFormat.IMAGE_FORMAT_PBM; |
| } |
| |
| @Override |
| public int getColorType() |
| { |
| return ImageInfo.COLOR_TYPE_BW; |
| } |
| |
| @Override |
| public String getImageTypeDescription() |
| { |
| return "PBM: portable bitmap fileformat"; |
| } |
| |
| @Override |
| public String getMIMEType() |
| { |
| return "image/x-portable-bitmap"; |
| } |
| |
| @Override |
| protected void newline() |
| { |
| bitcache = 0; |
| bits_in_cache = 0; |
| } |
| |
| |
| private int bitcache = 0; |
| private int bits_in_cache = 0; |
| |
| @Override |
| public int getRGB(InputStream is) throws IOException |
| { |
| if (bits_in_cache < 1) |
| { |
| int bits = is.read(); |
| if (bits < 0) |
| throw new IOException("PBM: Unexpected EOF"); |
| bitcache = 0xff & bits; |
| bits_in_cache += 8; |
| } |
| |
| int bit = 0x1 & (bitcache >> 7); |
| bitcache <<= 1; |
| bits_in_cache--; |
| |
| if (bit == 0) |
| return 0xffffffff; |
| if (bit == 1) |
| return 0xff000000; |
| throw new IOException("PBM: bad bit: " + bit); |
| } |
| |
| @Override |
| public int getRGB(WhiteSpaceReader wsr) throws IOException |
| { |
| int bit = Integer.parseInt(wsr.readtoWhiteSpace()); |
| if (bit == 0) |
| return 0xff000000; |
| if (bit == 1) |
| return 0xffffffff; |
| throw new IOException("PBM: bad bit: " + bit); |
| } |
| |
| } |