+++ /dev/null
-/*
- * Copyright (c) 2009, Takeyuki Nagao
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the
- * following conditions are met:
- *
- * * Redistributions of source code must retain the above
- * copyright notice, this list of conditions and the
- * following disclaimer.
- * * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the
- * following disclaimer in the documentation and/or other
- * materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
- * OF SUCH DAMAGE.
- */
-
-package jp.sourceforge.dvibrowser.dvicore.gs;
-import java.io.BufferedInputStream;
-import java.io.File;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.util.ArrayList;
-import java.util.Scanner;
-import java.util.concurrent.TimeUnit;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import jp.sourceforge.dvibrowser.dvicore.DviException;
-import jp.sourceforge.dvibrowser.dvicore.DviPaperSize;
-import jp.sourceforge.dvibrowser.dvicore.DviRect;
-import jp.sourceforge.dvibrowser.dvicore.DviResolution;
-import jp.sourceforge.dvibrowser.dvicore.DviSize;
-import jp.sourceforge.dvibrowser.dvicore.api.DviContext;
-import jp.sourceforge.dvibrowser.dvicore.image.pnm.PnmSplitter;
-import jp.sourceforge.dvibrowser.dvicore.image.split.SplitImageWriter;
-import jp.sourceforge.dvibrowser.dvicore.util.BufferFilter;
-import jp.sourceforge.dvibrowser.dvicore.util.CommandShell;
-import jp.sourceforge.dvibrowser.dvicore.util.CommandShellHandler;
-import jp.sourceforge.dvibrowser.dvicore.util.DviUtils;
-
-public class GhostscriptUtils {
- private static final class CommandShellHandlerImpl implements
- CommandShellHandler {
- private final ArrayList<String> list;
- private final String path;
- public CommandShellHandlerImpl(String path, ArrayList<String> list) {
- this.list = list;
- this.path = path;
- }
-
- public void handleStderr(InputStream in) throws IOException,
- DviException {
- DviUtils.logLinesFromStream("[stderr]", in, LOGGER, Level.WARNING);
- }
-
- public void handleStdin(OutputStream out) throws IOException,
- DviException {
- out.close();
- }
-
- public void handleStdout(InputStream in) throws IOException,
- DviException {
- try {
- Scanner s = new Scanner(in);
- String line = s.nextLine();
- if (line.indexOf("Ghostscript") != -1) {
- list.add(path);
- }
- in.close();
- } finally {
- DviUtils.silentClose(in);
- }
-
- }
- }
-
- private static final Logger LOGGER = Logger.getLogger(GhostscriptUtils.class
- .getName());
-
- public static DviRect [] computePostScriptBoundingBoxes(DviContext ctx, File file, int dpi) throws DviException, IOException, InterruptedException
- {
- if (ctx == null)
- throw new IllegalArgumentException("ctx can't be null");
-
- if (file == null)
- throw new IllegalArgumentException("file can't be null");
-
- if (dpi <= 0)
- throw new IllegalArgumentException("dpi <= 0: " + dpi);
-
- GhostscriptCommandBuilder gs = new GhostscriptCommandBuilder(ctx);
- gs.setInputFile(file);
- gs.setResolution(dpi);
- gs.setDevice("bbox");
- CommandShell shell = gs.createCommandShell();
- GhostscriptBBOXParser handler = new GhostscriptBBOXParser();
- shell.setHandler(handler);
- shell.execute();
-
- ArrayList<DviRect> list = new ArrayList<DviRect>();
-
- LOGGER.info("total pages=" + handler.getTotalPages());
- for (int i = 0; i < handler.getTotalPages(); i++) {
- DviRect bbox = handler.getBoundingBoxOfPage(i);
- LOGGER.info("bounding box[" + i + "]=" + bbox);
- list.add(bbox);
- }
- return list.toArray(new DviRect[list.size()]);
- }
-
- public static void renderAndSplit(final DviContext ctx, final InputStream is,
- DviSize unitSize, final SplitImageWriter imageWriter,
- DviResolution res,
- String deviceName, final int pageNum, final long timeout,
- final TimeUnit timeUnit) throws DviException {
- if (deviceName == null) {
- deviceName = "pnmraw";
- }
-
- GhostscriptCommandBuilder gs = new GhostscriptCommandBuilder(ctx);
- gs.setInputFile(null);
- gs.setOutputFile(null);
- gs.setResolution(res.dpi());
- gs.setDevice(deviceName);
- gs.setFirstPage(pageNum);
- gs.setLastPage(pageNum);
- gs.setTextAlpha(0); // textAlpha and graphicsAlpha have no effects for PNM
- // devices.
- gs.setGraphicsAlpha(0);
- CommandShell shell = gs.createCommandShell();
- shell.setTimeout(timeout, timeUnit);
- final PnmSplitter splitter = new PnmSplitter(unitSize, imageWriter);
- splitter.setShrinkFactor(res.shrinkFactor());
- final BufferFilter stdoutFilter = new BufferFilter(16384);
- CommandShellHandler handler = new CommandShellHandler() {
- public void handleStderr(InputStream in) throws IOException {
- try {
- DviUtils.dumpStreamAsync("gs stderr", in, System.err).join();
- } catch (InterruptedException e) {
- DviUtils.logStackTrace(LOGGER, Level.WARNING, e);
- }
- }
-
- public void handleStdin(OutputStream out) throws IOException {
- try {
- byte[] buf = new byte[16384];
- BufferedInputStream bis = new BufferedInputStream(is);
- do {
- int len = bis.read(buf);
- if (len < 0)
- break;
- out.write(buf, 0, len);
- } while (true);
- } finally {
- DviUtils.silentClose(out);
- DviUtils.silentClose(is);
- }
- }
-
- public void handleStdout(InputStream in) throws IOException, DviException {
- stdoutFilter.beginInput(in);
- try {
- splitter.splitImageFromStream(stdoutFilter);
- } finally {
- try {
- stdoutFilter.endInput();
- } catch (Exception e) {
- DviUtils.logStackTrace(LOGGER, Level.WARNING, e);
- }
- DviUtils.silentClose(in);
- }
- }
- };
- shell.setHandler(handler);
- int ret;
-
- try {
- ret = shell.execute();
- } catch (IOException e) {
- LOGGER.warning("Ghostscript failed with output: " + new String(stdoutFilter.getBuffer()));
- throw new DviException(e);
- } catch (InterruptedException e) {
- LOGGER.warning("Ghostscript failed with output: " + new String(stdoutFilter.getBuffer()));
- throw new DviException(e);
- }
- if (ret != 0) {
- LOGGER.warning("Ghostscript failed with output: " + new String(stdoutFilter.getBuffer()));
- throw new DviException("Ghostscript failed with exit code " + ret);
- }
- }
-
- public static DviRect mapToDviCoordinate(DviRect postScriptRect, DviPaperSize paperSize, DviResolution res)
- {
- DviRect paperRect = paperSize.toBoundingBox(res);
- return new DviRect(postScriptRect.x(), paperRect.y() - postScriptRect.y(), postScriptRect.width(), postScriptRect.height());
- }
-
- public static String [] listGhostscriptExecutables()
- {
- final ArrayList<String> list = new ArrayList<String>();
- final ArrayList<String> candidates = new ArrayList<String>();
-
- if (DviUtils.isWindows()) {
- candidates.add("gswin32c");
- }
- candidates.add("gs");
-
- LOGGER.fine("Start detecting Ghostscript.");
- for (String path : candidates) {
- LOGGER.fine("Trying " + path);
- try {
- CommandShell cs = new CommandShell();
- cs.setCommandLine(path, "-dSAFER", "-dPARANOIDSAFER", "-dDELAYSAFER", "-dNOPAUSE", "-dBATCH", "-help");
- cs.setHandler(new CommandShellHandlerImpl(path, list));
- cs.execute();
- } catch (Exception e) {
- DviUtils.logStackTrace(LOGGER, Level.WARNING, e);
- }
- }
- LOGGER.fine("Finished detecting Ghostscript.");
-
- return list.toArray(new String[list.size()]);
- }
-}
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