*/
public class PDFRenderer extends PrintRenderer {
- private static final boolean OPTIMIZE_TEXT = true;
-
/** the PDF Document being created */
protected PDFDocument pdfDoc;
/** the current page to add annotations to */
PDFPage currentPage;
+ PDFColor currentColor;
+
/** true if a TJ command is left to be written */
boolean textOpen = false;
private PDFOutline rootOutline;
+ /** reusable word area string buffer to reduce memory usage */
+ private StringBuffer _wordAreaPDF = new StringBuffer();
+
/**
* create the PDF renderer
*/
* @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 ? "<FEFF" : "(";
- String startText = useMultiByte ? "<" : "(";
- String endText = 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 ? "<FEFF" : "(";
+ String startText = useMultiByte ? "<" : "(";
+ String endText = 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();
+
}
* 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;
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;
projects / xmlgraphics-fop.git / commitdiff