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- /*
- * 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 uniform bits per component.
- * @param numComponents the number of components
- * @param bitsPerComponent number of bits per component
- */
- 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
- }
-
- }
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