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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.svg;
-
- import java.awt.BasicStroke;
- import java.awt.Color;
- import java.awt.Graphics2D;
- import java.awt.Paint;
- import java.awt.Shape;
- import java.awt.Stroke;
- import java.awt.font.TextAttribute;
- import java.awt.geom.AffineTransform;
- import java.awt.geom.Ellipse2D;
- import java.awt.geom.GeneralPath;
- import java.awt.geom.Point2D;
- import java.lang.reflect.Method;
- import java.text.AttributedCharacterIterator;
- import java.util.Iterator;
- import java.util.List;
-
- import org.apache.batik.bridge.SVGFontFamily;
- import org.apache.batik.gvt.font.GVTFont;
- import org.apache.batik.gvt.font.GVTFontFamily;
- import org.apache.batik.gvt.font.GVTGlyphVector;
- import org.apache.batik.gvt.renderer.StrokingTextPainter;
- import org.apache.batik.gvt.text.GVTAttributedCharacterIterator;
- import org.apache.batik.gvt.text.TextPaintInfo;
- import org.apache.batik.gvt.text.TextSpanLayout;
- import org.apache.fop.fonts.Font;
- import org.apache.fop.fonts.FontInfo;
- import org.apache.fop.fonts.FontTriplet;
- import org.apache.fop.util.CharUtilities;
-
- /**
- * Renders the attributed character iterator of a <tt>TextNode</tt>.
- * This class draws the text directly into the PDFGraphics2D so that
- * the text is not drawn using shapes which makes the PDF files larger.
- * If the text is simple enough to draw then it sets the font and calls
- * drawString. If the text is complex or the cannot be translated
- * into a simple drawString the StrokingTextPainter is used instead.
- *
- * @version $Id$
- */
- public class PDFTextPainter extends StrokingTextPainter {
-
- private static final boolean DEBUG = true;
-
- private boolean strokeText = false;
- private FontInfo fontInfo;
-
- /**
- * Create a new PDF text painter with the given font information.
- * @param fi the font info
- */
- public PDFTextPainter(FontInfo fi) {
- fontInfo = fi;
- }
-
- /** {@inheritDoc} */
- protected void paintTextRuns(List textRuns, Graphics2D g2d) {
- if (DEBUG) {
- System.out.println("paintTextRuns: count = " + textRuns.size());
- //fontInfo.dumpAllTripletsToSystemOut();
- }
- if (!(g2d instanceof PDFGraphics2D) || strokeText) {
- super.paintTextRuns(textRuns, g2d);
- return;
- }
- PDFGraphics2D pdf = (PDFGraphics2D)g2d;
- PDFTextUtil textUtil = new PDFTextUtil(pdf);
- for (int i = 0; i < textRuns.size(); i++) {
- TextRun textRun = (TextRun)textRuns.get(i);
- AttributedCharacterIterator runaci = textRun.getACI();
- runaci.first();
-
- TextPaintInfo tpi = (TextPaintInfo)runaci.getAttribute(PAINT_INFO);
- if (tpi == null || !tpi.visible) {
- continue;
- }
- if ((tpi != null) && (tpi.composite != null)) {
- g2d.setComposite(tpi.composite);
- }
-
- //------------------------------------
- TextSpanLayout layout = textRun.getLayout();
- if (DEBUG) {
- int charCount = runaci.getEndIndex() - runaci.getBeginIndex();
- System.out.println("================================================");
- System.out.println("New text run:");
- System.out.println("char count: " + charCount);
- System.out.println("range: "
- + runaci.getBeginIndex() + " - " + runaci.getEndIndex());
- System.out.println("glyph count: " + layout.getGlyphCount()); //=getNumGlyphs()
- }
- //Gather all characters of the run
- StringBuffer chars = new StringBuffer();
- for (runaci.first(); runaci.getIndex() < runaci.getEndIndex();) {
- chars.append(runaci.current());
- runaci.next();
- }
- runaci.first();
- if (DEBUG) {
- System.out.println("Text: " + chars);
- pdf.currentStream.write("%Text: " + chars + "\n");
- }
-
- GeneralPath debugShapes = null;
- if (DEBUG) {
- debugShapes = new GeneralPath();
- }
-
- Font[] fonts = findFonts(runaci);
- if (fonts == null || fonts.length == 0) {
- //Draw using Java2D
- textRun.getLayout().draw(g2d);
- continue;
- }
-
- textUtil.saveGraphicsState();
- textUtil.concatMatrixCurrentTransform();
- Shape imclip = g2d.getClip();
- pdf.writeClip(imclip);
-
- applyColorAndPaint(tpi, pdf);
-
- textUtil.beginTextObject();
- textUtil.setFonts(fonts);
- textUtil.setTextRenderingMode(tpi.fillPaint != null, tpi.strokePaint != null, false);
-
- AffineTransform localTransform = new AffineTransform();
- Point2D prevPos = null;
- double prevVisibleCharWidth = 0.0;
- GVTGlyphVector gv = layout.getGlyphVector();
- for (int index = 0, c = gv.getNumGlyphs(); index < c; index++) {
- char ch = chars.charAt(index);
- boolean visibleChar = gv.isGlyphVisible(index)
- || (CharUtilities.isAnySpace(ch) && !CharUtilities.isZeroWidthSpace(ch));
- if (DEBUG) {
- System.out.println("glyph " + index
- + " -> " + layout.getGlyphIndex(index) + " => " + ch);
- if (CharUtilities.isAnySpace(ch) && ch != 32) {
- System.out.println("Space found: " + Integer.toHexString(ch));
- }
- if (ch == CharUtilities.ZERO_WIDTH_JOINER) {
- System.out.println("ZWJ found: " + Integer.toHexString(ch));
- }
- if (ch == CharUtilities.SOFT_HYPHEN) {
- System.out.println("Soft hyphen found: " + Integer.toHexString(ch));
- }
- if (!visibleChar) {
- System.out.println("Invisible glyph found: " + Integer.toHexString(ch));
- }
- }
- if (!visibleChar) {
- continue;
- }
- Point2D p = gv.getGlyphPosition(index);
-
- AffineTransform glyphTransform = gv.getGlyphTransform(index);
- //TODO Glyph transforms could be refined so not every char has to be painted
- //with its own TJ command (stretch/squeeze case could be optimized)
- if (DEBUG) {
- System.out.println("pos " + p + ", transform " + glyphTransform);
- Shape sh;
- sh = gv.getGlyphLogicalBounds(index);
- if (sh == null) {
- sh = new Ellipse2D.Double(p.getX(), p.getY(), 2, 2);
- }
- debugShapes.append(sh, false);
- }
-
- //Exact position of the glyph
- localTransform.setToIdentity();
- localTransform.translate(p.getX(), p.getY());
- if (glyphTransform != null) {
- localTransform.concatenate(glyphTransform);
- }
- localTransform.scale(1, -1);
-
- boolean yPosChanged = (prevPos == null
- || prevPos.getY() != p.getY()
- || glyphTransform != null);
- if (yPosChanged) {
- if (index > 0) {
- textUtil.writeTJ();
- textUtil.writeTextMatrix(localTransform);
- }
- } else {
- double xdiff = p.getX() - prevPos.getX();
- //Width of previous character
- Font font = textUtil.getCurrentFont();
- double cw = prevVisibleCharWidth;
- double effxdiff = (1000 * xdiff) - cw;
- if (effxdiff != 0) {
- double adjust = (-effxdiff / font.getFontSize());
- textUtil.adjustGlyphTJ(adjust * 1000);
- }
- if (DEBUG) {
- System.out.println("==> x diff: " + xdiff + ", " + effxdiff
- + ", charWidth: " + cw);
- }
- }
- Font f = textUtil.selectFontForChar(ch);
- if (f != textUtil.getCurrentFont()) {
- textUtil.writeTJ();
- textUtil.setCurrentFont(f);
- textUtil.writeTf(f);
- textUtil.writeTextMatrix(localTransform);
- }
- char paintChar = (CharUtilities.isAnySpace(ch) ? ' ' : ch);
- textUtil.writeTJChar(paintChar);
-
- //Update last position
- prevPos = p;
- prevVisibleCharWidth = textUtil.getCurrentFont().getCharWidth(chars.charAt(index));
- }
- textUtil.writeTJ();
- textUtil.endTextObject();
- textUtil.restoreGraphicsState();
- if (DEBUG) {
- g2d.setStroke(new BasicStroke(0));
- g2d.setColor(Color.LIGHT_GRAY);
- g2d.draw(debugShapes);
- }
- }
- }
-
- private void applyColorAndPaint(TextPaintInfo tpi, PDFGraphics2D pdf) {
- Paint fillPaint = tpi.fillPaint;
- Paint strokePaint = tpi.strokePaint;
- Stroke stroke = tpi.strokeStroke;
- int fillAlpha = PDFGraphics2D.OPAQUE;
- if (fillPaint instanceof Color) {
- Color col = (Color)fillPaint;
- pdf.applyColor(col, true);
- fillAlpha = col.getAlpha();
- }
- if (strokePaint instanceof Color) {
- Color col = (Color)strokePaint;
- pdf.applyColor(col, false);
- }
- pdf.applyPaint(fillPaint, true);
- pdf.applyStroke(stroke);
- if (strokePaint != null) {
- pdf.applyPaint(strokePaint, false);
- }
- pdf.applyAlpha(fillAlpha, PDFGraphics2D.OPAQUE);
- }
-
- private Font[] findFonts(AttributedCharacterIterator aci) {
- List fonts = new java.util.ArrayList();
- List gvtFonts = (List) aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.GVT_FONT_FAMILIES);
- Float posture = (Float) aci.getAttribute(TextAttribute.POSTURE);
- Float taWeight = (Float) aci.getAttribute(TextAttribute.WEIGHT);
- Float fontSize = (Float) aci.getAttribute(TextAttribute.SIZE);
-
- String style = ((posture != null) && (posture.floatValue() > 0.0))
- ? "italic" : "normal";
- int weight = ((taWeight != null)
- && (taWeight.floatValue() > 1.0)) ? Font.WEIGHT_BOLD
- : Font.WEIGHT_NORMAL;
-
- String fontFamily = null;
-
- //GVT_FONT can sometimes be different from the fonts in GVT_FONT_FAMILIES
- //or GVT_FONT_FAMILIES can even be empty and only GVT_FONT is set
- /* The following code section is not available until Batik 1.7 is released. */
- GVTFont gvtFont = (GVTFont)aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.GVT_FONT);
- if (gvtFont != null) {
- try {
- Method method = gvtFont.getClass().getMethod("getFamilyName", null);
- String gvtFontFamily = (String)method.invoke(gvtFont, null);
- //TODO Uncomment the following line when Batik 1.7 is shipped with FOP
- //String gvtFontFamily = gvtFont.getFamilyName(); //Not available in Batik 1.6
- if (DEBUG) {
- System.out.print(gvtFontFamily + ", ");
- }
- if (fontInfo.hasFont(gvtFontFamily, style, weight)) {
- FontTriplet triplet = fontInfo.fontLookup(gvtFontFamily, style,
- weight);
- int fsize = (int)(fontSize.floatValue() * 1000);
- fonts.add(fontInfo.getFontInstance(triplet, fsize));
- }
- } catch (Exception e) {
- //Most likely NoSuchMethodError here when using Batik 1.6
- //Just skip this section in this case
- }
- }
-
- if (gvtFonts != null) {
- Iterator i = gvtFonts.iterator();
- while (i.hasNext()) {
- GVTFontFamily fam = (GVTFontFamily) i.next();
- if (fam instanceof SVGFontFamily) {
- return null; //Let Batik paint this text!
- }
- fontFamily = fam.getFamilyName();
- if (DEBUG) {
- System.out.print(fontFamily + ", ");
- }
- if (fontInfo.hasFont(fontFamily, style, weight)) {
- FontTriplet triplet = fontInfo.fontLookup(fontFamily, style,
- weight);
- int fsize = (int)(fontSize.floatValue() * 1000);
- fonts.add(fontInfo.getFontInstance(triplet, fsize));
- }
- }
- }
- if (fonts.size() == 0) {
- FontTriplet triplet = fontInfo.fontLookup("any", style, Font.WEIGHT_NORMAL);
- int fsize = (int)(fontSize.floatValue() * 1000);
- fonts.add(fontInfo.getFontInstance(triplet, fsize));
- if (DEBUG) {
- System.out.print("fallback to 'any' font");
- }
- }
- if (DEBUG) {
- System.out.println();
- }
- return (Font[])fonts.toArray(new Font[fonts.size()]);
- }
-
- }
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