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- /*
- * Copyright 1999-2004 The Apache Software Foundation.
- *
- * Licensed 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.image;
-
- // Java
- import java.io.ByteArrayOutputStream;
- import java.awt.color.ColorSpace;
- import java.awt.color.ICC_Profile;
-
- // FOP
- import org.apache.avalon.framework.logger.Logger;
- import org.apache.fop.util.CMYKColorSpace;
-
- /**
- * FopImage object for JPEG images, Using Java native classes.
- * @author Eric Dalquist
- * @see AbstractFopImage
- * @see FopImage
- */
- public class JpegImage extends AbstractFopImage {
- private ICC_Profile iccProfile = null;
- private boolean foundICCProfile = false;
- private boolean foundDimensions = false;
-
- /**
- * Create a jpeg image with the info.
- *
- * @param imgInfo the image info for this jpeg
- */
- public JpegImage(FopImage.ImageInfo imgInfo) {
- super(imgInfo);
- }
-
- /**
- * Load the original jpeg data.
- * This loads the original jpeg data and reads the color space,
- * and icc profile if any.
- *
- * @param ua the user agent
- * @return true if loaded false for any error
- */
- protected boolean loadOriginalData(Logger logger) {
- ByteArrayOutputStream baos = new ByteArrayOutputStream();
- ByteArrayOutputStream iccStream = new ByteArrayOutputStream();
- int index = 0;
- boolean cont = true;
-
- try {
- byte[] readBuf = new byte[4096];
- int bytesRead;
- while ((bytesRead = inputStream.read(readBuf)) != -1) {
- baos.write(readBuf, 0, bytesRead);
- }
- inputStream.close();
- inputStream = null;
- } catch (java.io.IOException ex) {
- logger.error("Error while loading image "
- + " : " + ex.getClass()
- + " - " + ex.getMessage(), ex);
- return false;
- }
-
- this.bitmaps = baos.toByteArray();
- this.bitsPerPixel = 8;
- this.isTransparent = false;
-
- //Check for SOI (Start of image) marker (FFD8)
- if (this.bitmaps.length > (index + 2)
- && uByte(this.bitmaps[index]) == 255 /*0xFF*/
- && uByte(this.bitmaps[index + 1]) == 216 /*0xD8*/) {
- index += 2;
-
- while (index < this.bitmaps.length && cont) {
- //check to be sure this is the begining of a header
- if (this.bitmaps.length > (index + 2)
- && uByte(this.bitmaps[index]) == 255 /*0xFF*/) {
-
- //192 or 194 are the header bytes that contain
- // the jpeg width height and color depth.
- if (uByte(this.bitmaps[index + 1]) == 192 /*0xC0*/
- || uByte(this.bitmaps[index + 1]) == 194 /*0xC2*/) {
-
- this.height = calcBytes(this.bitmaps[index + 5],
- this.bitmaps[index + 6]);
- this.width = calcBytes(this.bitmaps[index + 7],
- this.bitmaps[index + 8]);
-
- if (this.bitmaps[index + 9] == 1) {
- this.colorSpace = ColorSpace.getInstance(
- ColorSpace.CS_GRAY);
- } else if (this.bitmaps[index + 9] == 3) {
- this.colorSpace = ColorSpace.getInstance(
- ColorSpace.CS_LINEAR_RGB);
- } else if (this.bitmaps[index + 9] == 4) {
- // howto create CMYK color space
- /*
- this.colorSpace = ColorSpace.getInstance(
- ColorSpace.CS_CIEXYZ);
- */
- this.colorSpace = CMYKColorSpace.getInstance();
- } else {
- logger.error("Unknown ColorSpace for image: "
- + "");
- return false;
- }
-
- foundDimensions = true;
- if (foundICCProfile) {
- cont = false;
- break;
- }
- index += calcBytes(this.bitmaps[index + 2],
- this.bitmaps[index + 3]) + 2;
-
- } else if (uByte(this.bitmaps[index + 1]) == 226 /*0xE2*/
- && this.bitmaps.length > (index + 60)) {
- // Check if ICC profile
- byte[] iccString = new byte[11];
- System.arraycopy(this.bitmaps, index + 4,
- iccString, 0, 11);
-
- if ("ICC_PROFILE".equals(new String(iccString))) {
- int chunkSize = calcBytes(
- this.bitmaps[index + 2],
- this.bitmaps[index + 3]) + 2;
-
- iccStream.write(this.bitmaps,
- index + 18, chunkSize - 18);
-
- }
-
- index += calcBytes(this.bitmaps[index + 2],
- this.bitmaps[index + 3]) + 2;
- } else {
- index += calcBytes(this.bitmaps[index + 2],
- this.bitmaps[index + 3]) + 2;
- }
-
- } else {
- cont = false;
- }
- }
- } else {
- logger.error("Error while loading "
- + "JpegImage - Invalid JPEG Header.");
- return false;
- }
- if (iccStream.size() > 0) {
- byte[] align = new byte[((iccStream.size()) % 8) + 8];
- try {
- iccStream.write(align);
- } catch (Exception e) {
- logger.error("Error while loading image "
- + " : "
- + e.getMessage(), e);
- return false;
- }
- try {
- iccProfile = ICC_Profile.getInstance(iccStream.toByteArray());
- } catch (Exception e) {
- logger.error("Invalid ICC profile: " + e, e);
- return false;
- }
- } else if (this.colorSpace == null) {
- logger.error("ColorSpace not specified for JPEG image");
- return false;
- }
- return true;
- }
-
- /**
- * Get the ICC profile for this Jpeg image.
- *
- * @return the icc profile or null if not found
- */
- public ICC_Profile getICCProfile() {
- return iccProfile;
- }
-
- private int calcBytes(byte bOne, byte bTwo) {
- return (uByte(bOne) * 256) + uByte(bTwo);
- }
-
- private int uByte(byte bIn) {
- if (bIn < 0) {
- return 256 + bIn;
- } else {
- return bIn;
- }
- }
- }
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