DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG· RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT <http://issues.apache.org/bugzilla/show_bug.cgi?id=37116>. ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND· INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=37116 Summary: ESC POS Renderer Product: Fop Version: all Platform: Other OS/Version: other Status: NEW Severity: enhancement Priority: P2 Component: awt renderer AssignedTo: [email protected] ReportedBy: [EMAIL PROTECTED] Hi all, i would like to submit this ugly but functional implementation of a renderer for ESCPOS printers. With correct scale factor it can render against any ESCPOS printer directly (output stream to the device): ... Driver driver = new Driver(); OutputStream out= new FileOutputStream("/dev/usb/usbtm0"); // the printer device OutputStream debug= new FileOutputStream("/tmp/escpos.txt"); driver.setRenderer(new EscPosRenderer(284,new PrintWriter(debug))); driver.setOutputStream(out); driver.render(...); out.close(); ... Please let me know if you need more docs or info. Andrea. ---------------Renderer Code---------------------- package eforce.fop.renderer; /** * @Author Andrea A. A. Gariboldi * */ import java.awt.image.Raster; import java.io.OutputStream; import java.io.IOException; import java.io.PrintWriter; import org.apache.fop.render.awt.AWTRenderer; /** * EscPosRenderer converts AWTRenderer output * to an escpos raster bit image command. */ public class EscPosRenderer extends AWTRenderer { /** * Very usefull debug of 0 1 bit maps for * human beings. Expecially if you put in in * a file and look at without wrap. */ private PrintWriter debug; public EscPosRenderer() { super(null); this.debug= null; } /** * You will need scale factor to meet your printer * resolution, example: * * EPSON TM-L90 (scaleFactor 284): * max printable horizontal line = 71mm = 568 dots * so make a FO document to print a table with solid * borthers 71mm wide, and find that your scale factor * is 284. Is not so simple to explain why, you better test * it, playing with scaleFactor and trying to have your * table printed as 71mm wide, or better looking at * debug file, have your table printed as 568 dots wide. * */ public EscPosRenderer(double scaleFactor) { super(null); this.setScaleFactor(scaleFactor); this.debug= null; } public EscPosRenderer(double scaleFactor, PrintWriter debug) { super(null); this.setScaleFactor(scaleFactor); this.debug= debug; } public void stopRenderer(OutputStream out) throws IOException { super.stopRenderer(out); Raster r= getLastRenderedPage().getData(); double maxY= r.getBounds().getMaxY(); double maxX= r.getBounds().getMaxX(); int h= new Double(r.getBounds().getHeight()).intValue(); int w= new Double(r.getBounds().getWidth()).intValue(); /* convert to black & white image (very ugly) */ char[][] imagePixels= new char[h][w]; for (int y=(int)Math.round(r.getBounds().getMinY());y<maxY;y++) { for (int x=(int)Math.round(r.getBounds().getMinX());x<maxX;x++) { /* rgb values to 0 1 */ if (r.getSample(x,y,0)==255&&r.getSample(x,y,1)==255&&r.getSample (x,y,2)==255) imagePixels[y][x]= '0'; else imagePixels[y][x]= '1'; d(imagePixels[y][x]); } dln(); } dln("----------------------"); /* Escpos raster bit image is formed like this x=n*byte(8 bit) y=n*dots * so we need to convert w from dots to bytes, each byte represents 8 horizontal * dots, next we fill the end of the line whit nulls (xcorrection). * The result is an array on bytes to send to the printer. * */ int paperw= new Double(Math.ceil(new Double(w).doubleValue()/8.0)).intValue (); int xcorrection= (paperw*8)-w; byte[] image= new byte[paperw*h]; int cnt= 0,idx=0; StringBuffer sb= new StringBuffer(8); // so ugly for (int y=0;y<h;y++) { for (int x=0;x<w;x++) { if (++cnt==8) { sb.append(imagePixels[y][x]); String strb= sb.toString(); d(strb); int intb= Integer.parseInt(strb,2); image[idx++]= (byte)chr(intb); //binary string to byte sb.delete(0,8); cnt=0; } else sb.append(imagePixels[y][x]); } d("|"); for (int c=0;c<xcorrection;c++) if (++cnt==8) { sb.append('0'); String strb= sb.toString(); d(strb); int intb= Integer.parseInt(strb,2); image[idx++]= (byte)chr(intb); //binary string to byte sb.delete(0,8); cnt=0; } else sb.append('0'); //fill end of line with nulls dln(); } printImage(0, paperw, h, image, out); if (debug!=null) { debug.flush(); } } /** * Adpter for escpos raster bit image printing */ private static void printImage(int m, int w, int h, byte[] data, OutputStream out) throws IOException { int s=w*h,xH=1,xL=0,yH=1,yL=0,fix=255; if (data.length!=s) // if something strange stream!! throw new RuntimeException("wrong data count: data.length- > "+data.length+" w*h: "+s); if (w > fix) { xH= new Double(Math.floor((double)w/(double)fix)).intValue(); if (xH==0) xH=1; xL= w-(xH*fix); } else if (w < fix) { xH= 0; xL= w; } if (h > fix) { yH= new Double(Math.floor((double)h/(double)fix)).intValue(); if (yH==0) yH=1; yL= h-yH*fix; } else if (h < fix) { yH= 0; yL= new Double(Math.ceil(h)).intValue(); } int H= yL + yH * (fix+1),W= xL + xH * (fix+1),S= W*H; out.write(new byte[]{'\35','v','0',(byte)chr(m)}); //cmd1 out.flush(); out.write(new byte[]{(byte)chr(xL),(byte)chr(xH),(byte)chr(yL),(byte)chr (yH)}); //cmd2 out.flush(); out.write(data); //data out.flush(); byte[] surplus= new byte[S-data.length]; // data from strange escpos conversion functions // actually useless for (int i=0;i<surplus.length;i++) surplus[i]= (byte)chr(0); out.write(surplus); // actually useless data, that printer want! out.flush(); } /** * Stupid function to meet escpos samples, * and to try make code more readable */ private static char chr(int i) { return (char)i; } private void d(char c) { if (debug!=null) debug.print(c); } private void d(String s) { if (debug!=null) debug.print(s); } private void dln() { if (debug!=null) debug.println(); } private void dln(String s) { if (debug!=null) debug.println(s); } } ---------------------------------------------------------------- -- Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee.
