| /* |
| * 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. |
| */ |
| |
| /* $Id$ */ |
| |
| package org.apache.fop.afp.ioca; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| import org.apache.fop.afp.Streamable; |
| |
| /** |
| * This class represents the IOCA IDE Structure parameter (X'9B'). |
| */ |
| public class IDEStructureParameter implements Streamable { |
| |
| /** The RGB color model used by the IDE Structure parameter */ |
| public static final byte COLOR_MODEL_RGB = (byte)0x01; |
| /** The YCrCb color model used by the IDE Structure parameter */ |
| public static final byte COLOR_MODEL_YCRCB = (byte)0x02; |
| /** The CMYK color model used by the IDE Structure parameter */ |
| public static final byte COLOR_MODEL_CMYK = (byte)0x04; |
| /** The YCbCr color model used by the IDE Structure parameter */ |
| public static final byte COLOR_MODEL_YCBCR = (byte)0x12; |
| |
| /** additive/subtractive setting for ASFLAG */ |
| private boolean subtractive = false; |
| |
| /** setting for GRAYCODE flag */ |
| private boolean grayCoding = false; |
| |
| /** the image color model */ |
| private byte colorModel = COLOR_MODEL_RGB; |
| |
| /** the array with the number of bits/IDE for each component */ |
| private byte[] bitsPerIDE = new byte[] {(byte)1}; //1-bit by default |
| |
| /** |
| * Creates a new IDE Structure parameter. The values are initialized for a bi-level image |
| * using the RGB color model. |
| */ |
| public IDEStructureParameter() { |
| //nop |
| } |
| |
| /** |
| * Sets the image IDE color model. |
| * |
| * @param color the IDE color model. |
| */ |
| public void setColorModel(byte color) { |
| this.colorModel = color; |
| } |
| |
| /** |
| * Establishes the parameter values for the normal RGB 24bit color model. |
| */ |
| public void setDefaultRGBColorModel() { |
| this.colorModel = COLOR_MODEL_RGB; |
| setUniformBitsPerComponent(3, 8); |
| } |
| |
| /** |
| * Establishes the parameter values for the normal CMYK 32bit color model. |
| */ |
| public void setDefaultCMYKColorModel() { |
| this.colorModel = COLOR_MODEL_CMYK; |
| setUniformBitsPerComponent(4, 8); |
| } |
| |
| /** |
| * Sets |
| * @param numComponents |
| * @param bitsPerComponent |
| */ |
| public void setUniformBitsPerComponent(int numComponents, int bitsPerComponent) { |
| if (bitsPerComponent < 0 || bitsPerComponent >= 256) { |
| throw new IllegalArgumentException( |
| "The number of bits per component must be between 0 and 255"); |
| } |
| this.bitsPerIDE = new byte[numComponents]; |
| for (int i = 0; i < numComponents; i++) { |
| this.bitsPerIDE[i] = (byte)bitsPerComponent; |
| } |
| } |
| |
| /** |
| * Sets the array for the bits/IDE, one entry per component. |
| * @param bitsPerComponent the |
| */ |
| public void setBitsPerComponent(int[] bitsPerComponent) { |
| int numComponents = bitsPerComponent.length; |
| this.bitsPerIDE = new byte[numComponents]; |
| for (int i = 0; i < numComponents; i++) { |
| int bits = bitsPerComponent[i]; |
| if (bits < 0 || bits >= 256) { |
| throw new IllegalArgumentException( |
| "The number of bits per component must be between 0 and 255"); |
| } |
| this.bitsPerIDE[i] = (byte)bits; |
| } |
| } |
| |
| /** |
| * Set either additive or subtractive mode (used for ASFLAG). |
| * @param subtractive true for subtractive mode, false for additive mode |
| */ |
| public void setSubtractive(boolean subtractive) { |
| this.subtractive = subtractive; |
| } |
| |
| /** {@inheritDoc} */ |
| public void writeToStream(OutputStream os) throws IOException { |
| int length = 7 + bitsPerIDE.length; |
| |
| byte flags = 0x00; |
| if (subtractive) { |
| flags |= 1 << 7; |
| } |
| if (grayCoding) { |
| flags |= 1 << 6; |
| } |
| |
| DataOutputStream dout = new DataOutputStream(os); |
| dout.writeByte(0x9B); //ID |
| dout.writeByte(length - 2); //LENGTH |
| dout.writeByte(flags); //FLAGS |
| dout.writeByte(this.colorModel); //FORMAT |
| for (int i = 0; i < 3; i++) { |
| dout.writeByte(0); //RESERVED |
| } |
| dout.write(this.bitsPerIDE); //component sizes |
| } |
| |
| } |