| /* |
| * 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.awt.image.BufferedImage; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.util.Map; |
| |
| import org.apache.commons.sanselan.ImageWriteException; |
| |
| public class PbmWriter extends PnmWriter implements PnmConstants |
| { |
| public PbmWriter(boolean RAWBITS) |
| { |
| super(RAWBITS); |
| } |
| |
| public void writeImage(BufferedImage src, OutputStream os, Map params) |
| throws ImageWriteException, IOException |
| { |
| os.write(PNM_PREFIX_BYTE); |
| os.write(RAWBITS ? PBM_RAW_CODE : PBM_TEXT_CODE); |
| os.write(PNM_SEPARATOR); |
| |
| int width = src.getWidth(); |
| int height = src.getHeight(); |
| |
| os.write(("" + width).getBytes("US-ASCII")); |
| os.write(PNM_SEPARATOR); |
| |
| os.write(("" + height).getBytes("US-ASCII")); |
| os.write(PNM_NEWLINE); |
| |
| int bitcache = 0; |
| int bits_in_cache = 0; |
| |
| for (int y = 0; y < height; y++) |
| { |
| for (int x = 0; x < width; x++) |
| { |
| int argb = src.getRGB(x, y); |
| int red = 0xff & (argb >> 16); |
| int green = 0xff & (argb >> 8); |
| int blue = 0xff & (argb >> 0); |
| int sample = (red + green + blue) / 3; |
| if (sample > 127) |
| sample = 0; |
| else |
| sample = 1; |
| |
| if (RAWBITS) |
| { |
| bitcache = (bitcache << 1) | (0x1 & sample); |
| bits_in_cache++; |
| |
| if (bits_in_cache >= 8) |
| { |
| os.write((byte) bitcache); |
| bitcache = 0; |
| bits_in_cache = 0; |
| } |
| } else |
| { |
| os.write(("" + sample).getBytes("US-ASCII")); // max component value |
| os.write(PNM_SEPARATOR); |
| } |
| } |
| |
| if ((RAWBITS) && (bits_in_cache > 0)) |
| { |
| bitcache = bitcache << (8-bits_in_cache); |
| os.write((byte) bitcache); |
| bitcache = 0; |
| bits_in_cache = 0; |
| } |
| } |
| } |
| } |