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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.render.ps;
-
- import java.awt.Color;
- import java.awt.Dimension;
- import java.awt.Paint;
- import java.awt.Point;
- import java.awt.Rectangle;
- import java.awt.geom.AffineTransform;
- import java.io.IOException;
- import java.util.Map;
-
- import org.w3c.dom.Document;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.xmlgraphics.image.loader.ImageException;
- import org.apache.xmlgraphics.image.loader.ImageInfo;
- import org.apache.xmlgraphics.image.loader.ImageProcessingHints;
- import org.apache.xmlgraphics.image.loader.ImageSessionContext;
- import org.apache.xmlgraphics.ps.PSGenerator;
- import org.apache.xmlgraphics.ps.PSResource;
-
- import org.apache.fop.fonts.Font;
- import org.apache.fop.fonts.FontTriplet;
- import org.apache.fop.fonts.LazyFont;
- import org.apache.fop.fonts.MultiByteFont;
- import org.apache.fop.fonts.SingleByteFont;
- import org.apache.fop.fonts.Typeface;
- import org.apache.fop.render.RenderingContext;
- import org.apache.fop.render.intermediate.AbstractIFPainter;
- import org.apache.fop.render.intermediate.BorderPainter;
- import org.apache.fop.render.intermediate.GraphicsPainter;
- import org.apache.fop.render.intermediate.IFException;
- import org.apache.fop.render.intermediate.IFState;
- import org.apache.fop.traits.BorderProps;
- import org.apache.fop.traits.RuleStyle;
- import org.apache.fop.util.CharUtilities;
- import org.apache.fop.util.HexEncoder;
-
- /**
- * IFPainter implementation that produces PostScript.
- */
- public class PSPainter extends AbstractIFPainter<PSDocumentHandler> {
-
- /** logging instance */
- private static Log log = LogFactory.getLog(PSPainter.class);
-
- private final GraphicsPainter graphicsPainter;
-
- private BorderPainter borderPainter;
-
- private boolean inTextMode;
-
- /**
- * Default constructor.
- * @param documentHandler the parent document handler
- */
- public PSPainter(PSDocumentHandler documentHandler) {
- this(documentHandler, IFState.create());
- }
-
- protected PSPainter(PSDocumentHandler documentHandler, IFState state) {
- super(documentHandler);
- this.graphicsPainter = new PSGraphicsPainter(getGenerator());
- this.borderPainter = new BorderPainter(graphicsPainter);
- this.state = state;
- }
-
- private PSGenerator getGenerator() {
- return getDocumentHandler().getGenerator();
- }
-
- /** {@inheritDoc} */
- public void startViewport(AffineTransform transform, Dimension size, Rectangle clipRect)
- throws IFException {
- try {
- PSGenerator generator = getGenerator();
- saveGraphicsState();
- generator.concatMatrix(toPoints(transform));
- } catch (IOException ioe) {
- throw new IFException("I/O error in startViewport()", ioe);
- }
- if (clipRect != null) {
- clipRect(clipRect);
- }
- }
-
- /** {@inheritDoc} */
- public void endViewport() throws IFException {
- try {
- restoreGraphicsState();
- } catch (IOException ioe) {
- throw new IFException("I/O error in endViewport()", ioe);
- }
- }
-
- /** {@inheritDoc} */
- public void startGroup(AffineTransform transform, String layer) throws IFException {
- try {
- PSGenerator generator = getGenerator();
- saveGraphicsState();
- generator.concatMatrix(toPoints(transform));
- } catch (IOException ioe) {
- throw new IFException("I/O error in startGroup()", ioe);
- }
- }
-
- /** {@inheritDoc} */
- public void endGroup() throws IFException {
- try {
- restoreGraphicsState();
- } catch (IOException ioe) {
- throw new IFException("I/O error in endGroup()", ioe);
- }
- }
-
- /** {@inheritDoc} */
- protected Map createDefaultImageProcessingHints(ImageSessionContext sessionContext) {
- Map hints = super.createDefaultImageProcessingHints(sessionContext);
-
- //PostScript doesn't support alpha channels
- hints.put(ImageProcessingHints.TRANSPARENCY_INTENT,
- ImageProcessingHints.TRANSPARENCY_INTENT_IGNORE);
- //TODO We might want to support image masks in the future.
- return hints;
- }
-
- /** {@inheritDoc} */
- protected RenderingContext createRenderingContext() {
- PSRenderingContext psContext = new PSRenderingContext(
- getUserAgent(), getGenerator(), getFontInfo());
- return psContext;
- }
-
- /** {@inheritDoc} */
- protected void drawImageUsingImageHandler(ImageInfo info, Rectangle rect)
- throws ImageException, IOException {
- if (!getDocumentHandler().getPSUtil().isOptimizeResources()
- || PSImageUtils.isImageInlined(info,
- (PSRenderingContext)createRenderingContext())) {
- super.drawImageUsingImageHandler(info, rect);
- } else {
- if (log.isDebugEnabled()) {
- log.debug("Image " + info + " is embedded as a form later");
- }
- //Don't load image at this time, just put a form placeholder in the stream
- PSResource form = getDocumentHandler().getFormForImage(info.getOriginalURI());
- PSImageUtils.drawForm(form, info, rect, getGenerator());
- }
- }
-
- /** {@inheritDoc} */
- public void drawImage(String uri, Rectangle rect) throws IFException {
- try {
- endTextObject();
- } catch (IOException ioe) {
- throw new IFException("I/O error in drawImage()", ioe);
- }
- drawImageUsingURI(uri, rect);
- }
-
- /** {@inheritDoc} */
- public void drawImage(Document doc, Rectangle rect) throws IFException {
- try {
- endTextObject();
- } catch (IOException ioe) {
- throw new IFException("I/O error in drawImage()", ioe);
- }
- drawImageUsingDocument(doc, rect);
- }
-
- /** {@inheritDoc} */
- public void clipRect(Rectangle rect) throws IFException {
- try {
- PSGenerator generator = getGenerator();
- endTextObject();
- generator.defineRect(rect.x / 1000.0, rect.y / 1000.0,
- rect.width / 1000.0, rect.height / 1000.0);
- generator.writeln(generator.mapCommand("clip") + " " + generator.mapCommand("newpath"));
- } catch (IOException ioe) {
- throw new IFException("I/O error in clipRect()", ioe);
- }
- }
-
- /** {@inheritDoc} */
- public void clipBackground(Rectangle rect,
- BorderProps bpsBefore, BorderProps bpsAfter,
- BorderProps bpsStart, BorderProps bpsEnd) throws IFException {
-
- try {
- borderPainter.clipBackground(rect,
- bpsBefore, bpsAfter, bpsStart, bpsEnd);
- } catch (IOException ioe) {
- throw new IFException("I/O error while clipping background", ioe);
- }
-
- }
-
- /** {@inheritDoc} */
- public void fillRect(Rectangle rect, Paint fill) throws IFException {
- if (fill == null) {
- return;
- }
- if (rect.width != 0 && rect.height != 0) {
- try {
- endTextObject();
- PSGenerator generator = getGenerator();
- if (fill != null) {
- if (fill instanceof Color) {
- generator.useColor((Color)fill);
- } else {
- throw new UnsupportedOperationException("Non-Color paints NYI");
- }
- }
- generator.defineRect(rect.x / 1000.0, rect.y / 1000.0,
- rect.width / 1000.0, rect.height / 1000.0);
- generator.writeln(generator.mapCommand("fill"));
- } catch (IOException ioe) {
- throw new IFException("I/O error in fillRect()", ioe);
- }
- }
- }
-
- /** {@inheritDoc} */
- public void drawBorderRect(Rectangle rect, BorderProps top, BorderProps bottom,
- BorderProps left, BorderProps right, Color innerBackgroundColor) throws IFException {
- if (top != null || bottom != null || left != null || right != null) {
- try {
- endTextObject();
- if (getDocumentHandler().getPSUtil().getRenderingMode() == PSRenderingMode.SIZE
- && hasOnlySolidBorders(top, bottom, left, right)) {
- super.drawBorderRect(rect, top, bottom, left, right, innerBackgroundColor);
- } else {
- this.borderPainter.drawBorders(rect, top, bottom, left, right, innerBackgroundColor);
- }
- } catch (IOException ioe) {
- throw new IFException("I/O error in drawBorderRect()", ioe);
- }
- }
- }
-
- /** {@inheritDoc} */
- public void drawLine(Point start, Point end, int width, Color color, RuleStyle style)
- throws IFException {
- try {
- endTextObject();
- this.graphicsPainter.drawLine(start, end, width, color, style);
- } catch (IOException ioe) {
- throw new IFException("I/O error in drawLine()", ioe);
- }
- }
-
- private Typeface getTypeface(String fontName) {
- if (fontName == null) {
- throw new NullPointerException("fontName must not be null");
- }
- Typeface tf = getFontInfo().getFonts().get(fontName);
- if (tf instanceof LazyFont) {
- tf = ((LazyFont)tf).getRealFont();
- }
- return tf;
- }
-
- /**
- * Saves the graphics state of the rendering engine.
- * @throws IOException if an I/O error occurs
- */
- protected void saveGraphicsState() throws IOException {
- endTextObject();
- getGenerator().saveGraphicsState();
- }
-
- /**
- * Restores the last graphics state of the rendering engine.
- * @throws IOException if an I/O error occurs
- */
- protected void restoreGraphicsState() throws IOException {
- endTextObject();
- getGenerator().restoreGraphicsState();
- }
-
- /**
- * Indicates the beginning of a text object.
- * @throws IOException if an I/O error occurs
- */
- protected void beginTextObject() throws IOException {
- if (!inTextMode) {
- PSGenerator generator = getGenerator();
- generator.saveGraphicsState();
- generator.writeln("BT");
- inTextMode = true;
- }
- }
-
- /**
- * Indicates the end of a text object.
- * @throws IOException if an I/O error occurs
- */
- protected void endTextObject() throws IOException {
- if (inTextMode) {
- inTextMode = false;
- PSGenerator generator = getGenerator();
- generator.writeln("ET");
- generator.restoreGraphicsState();
- }
- }
-
- private String formatMptAsPt(PSGenerator gen, int value) {
- return gen.formatDouble(value / 1000.0);
- }
-
- /* Disabled: performance experiment (incomplete)
-
- private static final String ZEROS = "0.00";
-
- private String formatMptAsPt1(int value) {
- String s = Integer.toString(value);
- int len = s.length();
- StringBuffer sb = new StringBuffer();
- if (len < 4) {
- sb.append(ZEROS.substring(0, 5 - len));
- sb.append(s);
- } else {
- int dec = len - 3;
- sb.append(s.substring(0, dec));
- sb.append('.');
- sb.append(s.substring(dec));
- }
- return sb.toString();
- }*/
-
- /** {@inheritDoc} */
- public void drawText(int x, int y, int letterSpacing, int wordSpacing,
- int[][] dp, String text) throws IFException {
- try {
- //Do not draw text if font-size is 0 as it creates an invalid PostScript file
- if (state.getFontSize() == 0) {
- return;
- }
- PSGenerator generator = getGenerator();
- generator.useColor(state.getTextColor());
- beginTextObject();
- FontTriplet triplet = new FontTriplet(
- state.getFontFamily(), state.getFontStyle(), state.getFontWeight());
- //TODO Ignored: state.getFontVariant()
- //TODO Opportunity for font caching if font state is more heavily used
- String fontKey = getFontKey(triplet);
- int sizeMillipoints = state.getFontSize();
-
- // This assumes that *all* CIDFonts use a /ToUnicode mapping
- Typeface tf = getTypeface(fontKey);
- SingleByteFont singleByteFont = null;
- if (tf instanceof SingleByteFont) {
- singleByteFont = (SingleByteFont)tf;
- }
- Font font = getFontInfo().getFontInstance(triplet, sizeMillipoints);
-
- PSFontResource res = getDocumentHandler().getPSResourceForFontKey(fontKey);
- boolean otf = tf instanceof MultiByteFont && ((MultiByteFont)tf).isOTFFile();
- useFont(fontKey, sizeMillipoints, otf);
-
- if (dp != null && dp[0] != null) {
- x += dp[0][0];
- y -= dp[0][1];
- }
- generator.writeln("1 0 0 -1 " + formatMptAsPt(generator, x)
- + " " + formatMptAsPt(generator, y) + " Tm");
-
- int textLen = text.length();
- int start = 0;
- if (singleByteFont != null) {
- //Analyze string and split up in order to paint in different sub-fonts/encodings
- int currentEncoding = -1;
- for (int i = 0; i < textLen; i++) {
- char c = text.charAt(i);
- char mapped = tf.mapChar(c);
- int encoding = mapped / 256;
- if (currentEncoding != encoding) {
- if (i > 0) {
- writeText(text, start, i - start,
- letterSpacing, wordSpacing, dp, font, tf, false);
- }
- if (encoding == 0) {
- useFont(fontKey, sizeMillipoints, false);
- } else {
- useFont(fontKey + "_" + Integer.toString(encoding), sizeMillipoints, false);
- }
- currentEncoding = encoding;
- start = i;
- }
- }
- } else {
- if (tf instanceof MultiByteFont && ((MultiByteFont)tf).isOTFFile()) {
- //Analyze string and split up in order to paint in different sub-fonts/encodings
- int curEncoding = 0;
- for (int i = start; i < textLen; i++) {
- char orgChar = text.charAt(i);
-
- MultiByteFont mbFont = (MultiByteFont)tf;
- mbFont.mapChar(orgChar);
- int origGlyphIdx = mbFont.findGlyphIndex(orgChar);
- int newGlyphIdx = mbFont.getUsedGlyphs().get(origGlyphIdx);
- int encoding = newGlyphIdx / 256;
- if (encoding != curEncoding) {
- if (i != 0) {
- writeText(text, start, i - start, letterSpacing, wordSpacing, dp, font, tf,
- true);
- start = i;
- }
- generator.useFont("/" + res.getName() + "." + encoding, sizeMillipoints / 1000f);
- curEncoding = encoding;
- }
- }
- } else {
- useFont(fontKey, sizeMillipoints, false);
- }
- }
- writeText(text, start, textLen - start, letterSpacing, wordSpacing, dp, font, tf,
- tf instanceof MultiByteFont);
- } catch (IOException ioe) {
- throw new IFException("I/O error in drawText()", ioe);
- }
- }
-
- private void writeText(String text, int start, int len,
- int letterSpacing, int wordSpacing, int[][] dp,
- Font font, Typeface tf, boolean multiByte) throws IOException {
- PSGenerator generator = getGenerator();
- int end = start + len;
- int initialSize = len;
- initialSize += initialSize / 2;
-
- boolean hasLetterSpacing = (letterSpacing != 0);
- boolean needTJ = false;
-
- int lineStart = 0;
- StringBuffer accText = new StringBuffer(initialSize);
- StringBuffer sb = new StringBuffer(initialSize);
- boolean isOTF = multiByte && ((MultiByteFont)tf).isOTFFile();
- for (int i = start; i < end; i++) {
- int orgChar = text.charAt(i);
- int ch;
- int cw;
- int xGlyphAdjust = 0;
- int yGlyphAdjust = 0;
-
- if (CharUtilities.isFixedWidthSpace(orgChar)) {
- //Fixed width space are rendered as spaces so copy/paste works in a reader
- ch = font.mapChar(CharUtilities.SPACE);
- cw = font.getCharWidth(orgChar);
- xGlyphAdjust = font.getCharWidth(ch) - cw;
- } else {
- if ((wordSpacing != 0) && CharUtilities.isAdjustableSpace(orgChar)) {
- xGlyphAdjust -= wordSpacing;
- }
-
- // surrogate pairs have to be merged in a single code point
- if (CharUtilities.containsSurrogatePairAt(text, i)) {
- orgChar = Character.toCodePoint((char) orgChar, text.charAt(++i));
- }
-
- ch = font.mapCodePoint(orgChar);
- }
-
- if (dp != null && i < dp.length && dp[i] != null) {
- // get x advancement adjust
- xGlyphAdjust -= dp[i][2] - dp[i][0];
- yGlyphAdjust += dp[i][3] - dp[i][1];
- }
- if (dp != null && i < dp.length - 1 && dp[i + 1] != null) {
- // get x placement adjust for next glyph
- xGlyphAdjust -= dp[i + 1][0];
- yGlyphAdjust += dp[i + 1][1];
- }
- if (!multiByte || isOTF) {
- char codepoint = (char)(ch % 256);
- if (isOTF) {
- accText.append(HexEncoder.encode(codepoint, 2));
- } else {
- PSGenerator.escapeChar(codepoint, accText); //add character to accumulated text
- }
- } else {
- accText.append(HexEncoder.encode(ch));
- }
- if (xGlyphAdjust != 0 || yGlyphAdjust != 0) {
- needTJ = true;
- if (sb.length() == 0) {
- sb.append('['); //Need to start TJ
- }
- if (accText.length() > 0) {
- if ((sb.length() - lineStart + accText.length()) > 200) {
- sb.append(PSGenerator.LF);
- lineStart = sb.length();
- }
- lineStart = writePostScriptString(sb, accText, multiByte, lineStart);
- sb.append(' ');
- accText.setLength(0); //reset accumulated text
- }
- if (yGlyphAdjust == 0) {
- sb.append(Integer.toString(xGlyphAdjust)).append(' ');
- } else {
- sb.append('[');
- sb.append(Integer.toString(yGlyphAdjust)).append(' ');
- sb.append(Integer.toString(xGlyphAdjust)).append(']').append(' ');
- }
- }
- }
- if (needTJ) {
- if (accText.length() > 0) {
- if ((sb.length() - lineStart + accText.length()) > 200) {
- sb.append(PSGenerator.LF);
- }
- writePostScriptString(sb, accText, multiByte);
- }
- if (hasLetterSpacing) {
- sb.append("] " + formatMptAsPt(generator, letterSpacing) + " ATJ");
- } else {
- sb.append("] TJ");
- }
- } else {
- writePostScriptString(sb, accText, multiByte);
- if (hasLetterSpacing) {
- StringBuffer spb = new StringBuffer();
- spb.append(formatMptAsPt(generator, letterSpacing))
- .append(" 0 ");
- sb.insert(0, spb.toString());
- sb.append(" " + generator.mapCommand("ashow"));
- } else {
- sb.append(" " + generator.mapCommand("show"));
- }
- }
- generator.writeln(sb.toString());
- }
-
- private void writePostScriptString(StringBuffer buffer, StringBuffer string,
- boolean multiByte) {
- writePostScriptString(buffer, string, multiByte, 0);
- }
-
- private int writePostScriptString(StringBuffer buffer, StringBuffer string, boolean multiByte,
- int lineStart) {
- buffer.append(multiByte ? '<' : '(');
- int l = string.length();
- int index = 0;
- int maxCol = 200;
- buffer.append(string.substring(index, Math.min(index + maxCol, l)));
- index += maxCol;
- while (index < l) {
- if (!multiByte) {
- buffer.append('\\');
- }
- buffer.append(PSGenerator.LF);
- lineStart = buffer.length();
- buffer.append(string.substring(index, Math.min(index + maxCol, l)));
- index += maxCol;
- }
- buffer.append(multiByte ? '>' : ')');
- return lineStart;
- }
-
- private void useFont(String key, int size, boolean otf) throws IOException {
- PSFontResource res = getDocumentHandler().getPSResourceForFontKey(key);
- PSGenerator generator = getGenerator();
- String name = "/" + res.getName();
- if (otf) {
- name += ".0";
- }
- generator.useFont(name, size / 1000f);
- res.notifyResourceUsageOnPage(generator.getResourceTracker());
- }
- }
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