From 78f41f1fc1b62f0daa2f108cdad396b1b5fbea9d Mon Sep 17 00:00:00 2001 From: Kelly Campbell Date: Mon, 2 Apr 2001 03:47:42 +0000 Subject: [PATCH] Cleaned up renderWordArea. removed unused code. optimized object creation a little. PR: Obtained from: Submitted by: Reviewed by: git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@194188 13f79535-47bb-0310-9956-ffa450edef68 --- .../apache/fop/render/pdf/PDFRenderer.java | 359 +++++++++--------- 1 file changed, 174 insertions(+), 185 deletions(-) diff --git a/src/org/apache/fop/render/pdf/PDFRenderer.java b/src/org/apache/fop/render/pdf/PDFRenderer.java index eb4ab80e3..8161f98a1 100644 --- a/src/org/apache/fop/render/pdf/PDFRenderer.java +++ b/src/org/apache/fop/render/pdf/PDFRenderer.java @@ -36,8 +36,6 @@ import java.util.Hashtable; */ public class PDFRenderer extends PrintRenderer { - private static final boolean OPTIMIZE_TEXT = true; - /** the PDF Document being created */ protected PDFDocument pdfDoc; @@ -53,6 +51,8 @@ public class PDFRenderer extends PrintRenderer { /** the current page to add annotations to */ PDFPage currentPage; + PDFColor currentColor; + /** true if a TJ command is left to be written */ boolean textOpen = false; @@ -69,6 +69,9 @@ public class PDFRenderer extends PrintRenderer { private PDFOutline rootOutline; + /** reusable word area string buffer to reduce memory usage */ + private StringBuffer _wordAreaPDF = new StringBuffer(); + /** * create the PDF renderer */ @@ -373,182 +376,167 @@ public class PDFRenderer extends PrintRenderer { * @param area inline area to render */ public void renderWordArea(WordArea area) { - // char ch; - StringBuffer pdf = new StringBuffer(); - - Hashtable kerning = null; - boolean kerningAvailable = false; - - kerning = area.getFontState().getKerning(); - if (kerning != null && !kerning.isEmpty()) { - kerningAvailable = true; - } - - String name = area.getFontState().getFontName(); - int size = area.getFontState().getFontSize(); - - // This assumes that *all* CIDFonts use a /ToUnicode mapping - boolean useMultiByte = false; - Font f = (Font) area.getFontState().getFontInfo().getFonts().get( - name); - if (f instanceof CIDFont) - useMultiByte = true; - //String startText = useMultiByte ? "" : ")"; - - PDFColor theAreaColor = new PDFColor((double) area.getRed(), - (double) area.getGreen(), (double) area.getBlue()); - - if ((!name.equals(this.currentFontName)) || + synchronized (_wordAreaPDF) { + StringBuffer pdf = _wordAreaPDF; + pdf.setLength(0); + + Hashtable kerning = null; + boolean kerningAvailable = false; + + kerning = area.getFontState().getKerning(); + if (kerning != null && !kerning.isEmpty()) { + kerningAvailable = true; + } + + String name = area.getFontState().getFontName(); + int size = area.getFontState().getFontSize(); + + // This assumes that *all* CIDFonts use a /ToUnicode mapping + boolean useMultiByte = false; + Font f = (Font) area.getFontState().getFontInfo().getFonts().get( + name); + if (f instanceof CIDFont) + useMultiByte = true; + //String startText = useMultiByte ? " " : ") "; + + if ((!name.equals(this.currentFontName)) || (size != this.currentFontSize)) { - closeText(); - - this.currentFontName = name; - this.currentFontSize = size; - pdf = pdf.append("/" + name + " " + (size / 1000) + " Tf\n"); - } - - - if (!(theAreaColor.equals(this.currentFill))) { - closeText(); - this.currentFill = theAreaColor; - pdf.append(this.currentFill.getColorSpaceOut(true)); - } - - - int rx = this.currentXPosition; - int bl = this.currentYPosition; - - addWordLines(area, rx, bl, size, theAreaColor); - - if (OPTIMIZE_TEXT) { - if (!textOpen || bl != prevWordY) { - closeText(); - - pdf.append("1 0 0 1 " +(rx / 1000f) + " " + - (bl / 1000f) + " Tm [" + startText); - prevWordY = bl; - textOpen = true; - } else { - // express the space between words in thousandths of an em - int space = prevWordX - rx + prevWordWidth; - float emDiff = - (float) space / (float) currentFontSize * 1000f; - pdf.append(emDiff + " " + startText); - } - prevWordWidth = area.getContentWidth(); - prevWordX = rx; - - } else { - // original text render code sets the text transformation matrix - // for every word. - pdf.append("1 0 0 1 " +(rx / 1000f) + " " + (bl / 1000f) + - " Tm "); - if (kerningAvailable) { - pdf.append(" [" + startText); - } else { - pdf.append(" " + startText); - } - } - - String s; - if (area.getPageNumberID() != null) { // this text is a page number, so resolve it - s = idReferences.getPageNumber(area.getPageNumberID()); - if (s == null) { - s = ""; - } - } else { - s = area.getText(); - } - - int l = s.length(); - - for (int i = 0; i < l; i++) { - char ch = s.charAt(i); - String prepend = ""; - - if (!useMultiByte) { - if (ch > 127) { - pdf.append("\\"); - pdf.append(Integer.toOctalString((int) ch)); - } else { - switch (ch) { - case '(': - case ')': - case '\\': - prepend = "\\"; - break; - } - pdf.append( - getUnicodeString(prepend + ch, useMultiByte)); - } - } else { - pdf.append(getUnicodeString(prepend + ch, useMultiByte)); - } - - if (kerningAvailable && (i + 1) < l) { - addKerning(pdf, (new Integer((int) ch)), - (new Integer((int) s.charAt(i + 1))), kerning, - startText, endText); - } - - } - pdf.append(endText + " "); - if (!OPTIMIZE_TEXT) { - if (kerningAvailable) { - pdf.append("] TJ\n"); - } else { - pdf.append("Tj\n"); - } - - } - - - - currentStream.add(pdf.toString()); - - this.currentXPosition += area.getContentWidth(); - + closeText(); + + this.currentFontName = name; + this.currentFontSize = size; + pdf = pdf.append("/" + name + " " + (size / 1000) + " Tf\n"); + } + + PDFColor areaColor = null; + if (this.currentFill instanceof PDFColor) { + areaColor = (PDFColor)this.currentFill; + } + + if (areaColor == null || + areaColor.red() != (double)area.getRed() || + areaColor.green() != (double)area.getGreen() || + areaColor.blue() != (double)area.getBlue()) { + + areaColor = new PDFColor((double) area.getRed(), + (double) area.getGreen(), + (double) area.getBlue()); + + + closeText(); + this.currentFill = areaColor; + pdf.append(this.currentFill.getColorSpaceOut(true)); + } + + + int rx = this.currentXPosition; + int bl = this.currentYPosition; + + addWordLines(area, rx, bl, size, areaColor); + + + if (!textOpen || bl != prevWordY) { + closeText(); + + pdf.append("1 0 0 1 " +(rx / 1000f) + " " + + (bl / 1000f) + " Tm [" + startText); + prevWordY = bl; + textOpen = true; + } else { + // express the space between words in thousandths of an em + int space = prevWordX - rx + prevWordWidth; + float emDiff = + (float) space / (float) currentFontSize * 1000f; + pdf.append(Float.toString(emDiff)); + pdf.append(" "); + pdf.append(startText); + } + prevWordWidth = area.getContentWidth(); + prevWordX = rx; + + + String s; + if (area.getPageNumberID() != null) { // this text is a page number, so resolve it + s = idReferences.getPageNumber(area.getPageNumberID()); + if (s == null) { + s = ""; + } + } else { + s = area.getText(); + } + + int l = s.length(); + + for (int i = 0; i < l; i++) { + char ch = s.charAt(i); + + if (!useMultiByte) { + if (ch > 127) { + pdf.append("\\"); + pdf.append(Integer.toOctalString((int) ch)); + + } else { + switch (ch) { + case '(': + case ')': + case '\\': + pdf.append("\\"); + break; + } + pdf.append(ch); + } + } + else { + pdf.append(getUnicodeString(ch)); + } + + if (kerningAvailable && (i + 1) < l) { + addKerning(pdf, (new Integer((int) ch)), + (new Integer((int) s.charAt(i + 1))), kerning, + startText, endText); + } + + } + pdf.append(endText); + + currentStream.add(pdf.toString()); + + this.currentXPosition += area.getContentWidth(); + + } } - + /** - * Convert a string to a unicode hex representation + * Convert a char to a multibyte hex representation */ - private String getUnicodeString(StringBuffer str, - boolean useMultiByte) { - return getUnicodeString(str.toString(), useMultiByte); - } - - /** - * Convert a string to a multibyte hex representation - */ - private String getUnicodeString(String str, boolean useMultiByte) { - if (!useMultiByte) { - return str; - } else { - StringBuffer buf = new StringBuffer(str.length() * 4); - byte[] uniBytes = null; - try { - uniBytes = str.getBytes("UnicodeBigUnmarked"); - } catch (Exception e) { - // This should never fail - } - - for (int i = 0; i < uniBytes.length; i++) { - int b = (uniBytes[i] < 0) ? (int)(256 + uniBytes[i]) : - (int) uniBytes[i]; - - String hexString = Integer.toHexString(b); - if (hexString.length() == 1) - buf = buf.append("0"+hexString); - else - buf = buf.append(hexString); - } - - return buf.toString(); - } + private String getUnicodeString(char c) { + + StringBuffer buf = new StringBuffer(4); + + byte[] uniBytes = null; + try { + char[] a = {c}; + uniBytes = new String(a).getBytes("UnicodeBigUnmarked"); + } catch (Exception e) { + // This should never fail + } + + for (int i = 0; i < uniBytes.length; i++) { + int b = (uniBytes[i] < 0) ? (int)(256 + uniBytes[i]) : + (int) uniBytes[i]; + + String hexString = Integer.toHexString(b); + if (hexString.length() == 1) + buf = buf.append("0"+hexString); + else + buf = buf.append(hexString); + } + + return buf.toString(); + } @@ -556,7 +544,7 @@ public class PDFRenderer extends PrintRenderer { * still and writes out the TJ command to the stream if we do */ private void closeText() { - if (OPTIMIZE_TEXT && textOpen) { + if (textOpen) { currentStream.add("] TJ\n"); textOpen = false; prevWordX = 0; @@ -566,22 +554,23 @@ public class PDFRenderer extends PrintRenderer { private void addKerning(StringBuffer buf, Integer ch1, Integer ch2, Hashtable kerning, String startText, String endText) { - Hashtable h2 = (Hashtable) kerning.get(ch1); - - if (h2 != null) { - Integer wdt = (Integer) h2.get(ch2); - if (wdt != null) { - buf.append(endText).append(' ').append(- - wdt.intValue()).append(' ').append(startText); + Hashtable kernPair = (Hashtable) kerning.get(ch1); + + if (kernPair != null) { + Integer width = (Integer) kernPair.get(ch2); + if (width != null) { + buf.append(endText) + .append(-(width.intValue())) + .append(' ').append(startText); } } } /** - * render page into PDF - * - * @param page page to render - */ + * render page into PDF + * + * @param page page to render + */ public void renderPage(Page page) { BodyAreaContainer body; AreaContainer before, after, start, end; -- 2.39.5