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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.awt.image.ImageProducer;
- import java.awt.image.ColorModel;
- import java.awt.image.IndexColorModel;
- import java.awt.color.ColorSpace;
- import java.awt.Color;
- import java.io.InputStream;
- import java.io.IOException;
- import java.net.URLConnection;
-
- // FOP
- import org.apache.avalon.framework.logger.Logger;
-
- /**
- * FopImage object for GIF images, using Java native classes.
- * @author Eric SCHAEFFER
- * @author Modified by Eric Dalquist - 9/14/2001 - ebdalqui@mtu.edu
- * @see AbstractFopImage
- * @see FopImage
- */
- public class GifImage extends AbstractFopImage {
- /**
- * Create a new gif image.
- *
- * @param imgInfo the image info for this gif image
- */
- public GifImage(FopImage.ImageInfo imgInfo) {
- super(imgInfo);
- }
-
- /**
- * Load the bitmap for this gif image.
- * This loads the data and creates a bitmap byte array
- * of the image data.
- * To decode the image a dummy URLConnection is used that
- * will do the conversion.
- *
- * @param ua the user agent for loading
- * @return True if the load process succeeded
- */
- protected boolean loadBitmap(Logger logger) {
- int[] tmpMap = null;
- try {
- URLConnection con = new DummyConnection(inputStream);
-
- ImageProducer ip = (ImageProducer) con.getContent();
- if (ip == null) {
- return false;
- }
- FopImageConsumer consumer = new FopImageConsumer(ip);
- ip.startProduction(consumer);
-
- //Load the image into memory
- while (!consumer.isImageReady()) {
- Thread.sleep(500);
- }
-
- this.height = consumer.getHeight();
- this.width = consumer.getWidth();
-
- try {
- tmpMap = consumer.getImage();
- } catch (Exception ex) {
- logger.error("Image grabbing interrupted : "
- + ex.getMessage(), ex);
- return false;
- }
-
- inputStream.close();
- inputStream = null;
-
- ColorModel cm = consumer.getColorModel();
- this.bitsPerPixel = 8;
- // this.bitsPerPixel = cm.getPixelSize();
- this.colorSpace = ColorSpace.getInstance(ColorSpace.CS_LINEAR_RGB);
- if (cm.hasAlpha()) {
- // java.awt.Transparency. BITMASK or OPAQUE or TRANSLUCENT
- int transparencyType = cm.getTransparency();
-
- if (transparencyType == java.awt.Transparency.OPAQUE) {
- this.isTransparent = false;
- } else if (transparencyType == java.awt.Transparency.BITMASK) {
- if (cm instanceof IndexColorModel) {
- IndexColorModel indexcm = (IndexColorModel) cm;
- this.isTransparent = false;
- byte[] alphas = new byte[indexcm.getMapSize()];
- byte[] reds = new byte[indexcm.getMapSize()];
- byte[] greens = new byte[indexcm.getMapSize()];
- byte[] blues = new byte[indexcm.getMapSize()];
- indexcm.getAlphas(alphas);
- indexcm.getReds(reds);
- indexcm.getGreens(greens);
- indexcm.getBlues(blues);
- for (int i = 0;
- i < indexcm.getMapSize();
- i++) {
- if ((alphas[i] & 0xFF) == 0) {
- this.isTransparent = true;
- this.transparentColor = new Color(
- (int)(reds[i] & 0xFF),
- (int)(greens[i] & 0xFF),
- (int)(blues[i] & 0xFF));
- break;
- }
- }
- } else {
- // TRANSLUCENT
- /*
- * this.isTransparent = false;
- * for (int i = 0; i < this.width * this.height; i++) {
- * if (cm.getAlpha(tmpMap[i]) == 0) {
- * this.isTransparent = true;
- * this.transparentColor = new PDFColor(cm.getRed(tmpMap[i]),
- * cm.getGreen(tmpMap[i]), cm.getBlue(tmpMap[i]));
- * break;
- * }
- * }
- */
- // use special API...
- this.isTransparent = false;
- }
- } else {
- this.isTransparent = false;
- }
- } else {
- this.isTransparent = false;
- }
- } catch (Exception ex) {
- logger.error("Error while loading image "
- + "" + " : "
- + ex.getClass() + " - "
- + ex.getMessage(), ex);
- return false;
- }
-
- // Should take care of the ColorSpace and bitsPerPixel
- this.bitmapsSize = this.width * this.height * 3;
- this.bitmaps = new byte[this.bitmapsSize];
- for (int i = 0; i < this.height; i++) {
- for (int j = 0; j < this.width; j++) {
- int p = tmpMap[i * this.width + j];
- int r = (p >> 16) & 0xFF;
- int g = (p >> 8) & 0xFF;
- int b = (p) & 0xFF;
- this.bitmaps[3 * (i * this.width + j)] =
- (byte)(r & 0xFF);
- this.bitmaps[3 * (i * this.width + j) + 1] =
- (byte)(g & 0xFF);
- this.bitmaps[3 * (i * this.width + j) + 2] =
- (byte)(b & 0xFF);
- }
- }
- return true;
- }
-
- /**
- * A dummy url connection for a gif image in an input stream.
- */
- protected static class DummyConnection extends URLConnection {
- private InputStream inputStream;
-
- DummyConnection(InputStream is) {
- super(null);
- inputStream = is;
- }
-
- public InputStream getInputStream() throws IOException {
- return inputStream;
- }
-
- public void connect() throws IOException {
- // do nothing
- }
-
- public String getContentType() {
- return "image/gif";
- }
-
- public int getContentLength() {
- try {
- return inputStream.available();
- } catch (IOException e) {
- return -1;
- }
- }
-
- }
- }
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