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/* PostScriptGraphics2D.java -- AWT printer rendering class.

   Copyright (C) 2006  Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.

GNU Classpath is distributed in the hope that it will be useful, but

WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

General Public License for more details.

You should have received a copy of the GNU General Public License

along with GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

package gnu.java.awt.print;

import java.awt.BasicStroke;

import java.awt.Color;

import java.awt.Composite;

import java.awt.Paint;

import java.awt.Font;

import java.awt.FontMetrics;

import java.awt.GradientPaint;

import java.awt.Graphics;

import java.awt.GraphicsConfiguration;

import java.awt.Graphics2D;

import java.awt.Image;

import java.awt.Polygon;

import java.awt.Rectangle;

import java.awt.RenderingHints;

import java.awt.Shape;

import java.awt.Stroke;

import java.awt.geom.AffineTransform;

import java.awt.geom.Arc2D;

import java.awt.geom.Ellipse2D;

import java.awt.geom.RoundRectangle2D;

import java.awt.geom.PathIterator;

import java.awt.geom.Point2D;

import java.awt.geom.Rectangle2D;

import java.awt.font.FontRenderContext;

import java.awt.font.GlyphVector;

import java.awt.font.TextLayout;

import java.awt.image.BufferedImage;

import java.awt.image.BufferedImageOp;

import java.awt.image.renderable.RenderableImage;

import java.awt.image.RenderedImage;

import java.awt.image.ImageObserver;

import java.awt.image.PixelGrabber;

import java.awt.print.PageFormat;

import java.awt.print.Pageable;

import java.awt.print.Paper;

import java.awt.print.Printable;

import java.awt.print.PrinterException;

import java.awt.print.PrinterJob;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStreamWriter;

import java.io.PrintWriter;

import java.text.AttributedCharacterIterator;

import java.util.Map;

/**

 * Class PostScriptGraphics2D - Class that implements the Graphics2D object,

 * writing the output to a PostScript or EPS file

 *

 * @author Sven de Marothy

 *

 */

class PostScriptGraphics2D extends Graphics2D

{

  /**

   * The associated printer job.

   */

  private PrinterJob printerJob;

  /**

   * Output file.

   */

  private PrintWriter out;

  // Graphics data

  private AffineTransform currentTransform = new AffineTransform();

  private AffineTransform pageTransform;

  private RenderingHints renderingHints;

  private Paint currentPaint = null;

  private Shape clipShape = null;

  private Font currentFont = null;

  private Color currentColor = Color.black;

  private Color backgroundColor = Color.white;

  private Stroke currentStroke = null;

  private static Stroke ordinaryStroke = new BasicStroke(0.0f,

                                                         BasicStroke.CAP_BUTT,

                                                         BasicStroke.JOIN_MITER);

  private float cx; // current drawing position

  private float cy; // current drawing position

  private boolean currentFontIsPS; // set if currentFont is one of the above

  // settings

  private double pageX = 595;

  private double pageY = 842;

  private double Y = pageY;

  private boolean gradientOn = false;

  /**

   * Constructor

   *

   */

  public PostScriptGraphics2D( PrinterJob pg )

  {

    printerJob = pg;

    // create transform objects

    pageTransform = new AffineTransform();

    currentTransform = new AffineTransform();

    /*

      Create Rendering hints

      No text aliasing

      Quality color and rendering

      Bicubic interpolation

      Fractional metrics supported

    */

    renderingHints = new RenderingHints(null);

    renderingHints.put(RenderingHints.KEY_RENDERING,

                       RenderingHints.VALUE_RENDER_QUALITY);

    renderingHints.put(RenderingHints.KEY_TEXT_ANTIALIASING,

                       RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);

    renderingHints.put(RenderingHints.KEY_INTERPOLATION,

                       RenderingHints.VALUE_INTERPOLATION_BICUBIC);

    renderingHints.put(RenderingHints.KEY_FRACTIONALMETRICS,

                       RenderingHints.VALUE_FRACTIONALMETRICS_ON);

    renderingHints.put(RenderingHints.KEY_COLOR_RENDERING,

                       RenderingHints.VALUE_COLOR_RENDER_QUALITY);

  }

  /**

   * Spool a document to PostScript.

   * If Pageable is non-null, it will print that, otherwise it will use

   * the supplied printable and pageFormat.

   */

  public SpooledDocument spoolPostScript(Printable printable,

                                         PageFormat pageFormat,

                                         Pageable pageable)

    throws PrinterException

  {

    try

      {

        // spool to a temporary file

        File temp = File.createTempFile("cpspool", ".ps");

        temp.deleteOnExit();

        out = new PrintWriter(new BufferedWriter

                              (new OutputStreamWriter

                               (new FileOutputStream(temp),

                                "ISO8859_1"), 1000000));

        writePSHeader();

        if(pageable != null)

          {

            for(int index = 0; index < pageable.getNumberOfPages(); index++)

              spoolPage(out, pageable.getPrintable(index),

                        pageable.getPageFormat(index), index);

          }

        else

          {

            int index = 0;

            while(spoolPage(out, printable, pageFormat, index++) ==

                  Printable.PAGE_EXISTS)

              ;

          }

        out.println("%%Trailer");

        out.println("%%EOF");

        out.close();

        return new SpooledDocument( temp );

      }

    catch (IOException e)

      {

        PrinterException pe = new PrinterException();

        pe.initCause(e);

        throw pe;

      }

  }

  //--------------------------------------------------------------------------

  /**

   * Write the postscript file header,

   * setup the page format and transforms.

   */

  private void writePSHeader()

  {

    out.println("%!PS-Adobe-3.0");

    out.println("%%Title: "+printerJob.getJobName());

    out.println("%%Creator: GNU Classpath ");

    out.println("%%DocumentData: Clean8Bit");

    out.println("%%DocumentNeededResources: font Times-Roman Helvetica Courier");

    out.println("%%EndComments");

    out.println("%%BeginProlog");

    out.println("%%EndProlog");

    out.println("%%BeginSetup");

    out.println("%%EndFeature");

    setupFonts();

    out.println("%%EndSetup");

    // set default fonts and colors

    setFont( new Font("Dialog", Font.PLAIN, 12) );

    currentColor = Color.white;

    currentStroke = new BasicStroke();

    setPaint(currentColor);

    setStroke(currentStroke);

  }

  /**

   * setupFonts - set up the font dictionaries for

   * helvetica, times and courier

   */

  private void setupFonts()

  {

    out.println("/helveticaISO");

    out.println("/Helvetica findfont dup length dict begin");

    out.println("{ 1 index /FID eq { pop pop } { def } ifelse } forall");

    out.println("/Encoding ISOLatin1Encoding def");

    out.println("currentdict end definefont pop");

    out.println("/timesISO");

    out.println("/Times-Roman findfont dup length dict begin");

    out.println("{ 1 index /FID eq { pop pop } { def } ifelse } forall");

    out.println("/Encoding ISOLatin1Encoding def");

    out.println("currentdict end definefont pop");

    out.println("/courierISO");

    out.println("/Courier findfont dup length dict begin");

    out.println("{ 1 index /FID eq { pop pop } { def } ifelse } forall");

    out.println("/Encoding ISOLatin1Encoding def");

    out.println("currentdict end definefont pop");

  }

  /**

   * Spools a single page, returns NO_SUCH_PAGE unsuccessful,

   * PAGE_EXISTS if it was.

   */

  public int spoolPage(PrintWriter out,

                       Printable printable,

                       PageFormat pageFormat,

                       int index) throws IOException, PrinterException

  {

    out.println("%%BeginPageSetup");

    Paper p = pageFormat.getPaper();

    pageX = p.getWidth();

    pageY = p.getHeight();

    if( pageFormat.getOrientation() == PageFormat.PORTRAIT )

      out.println( "%%Orientation: Portrait" );

    else

      {

        out.println( "%%Orientation: Landscape" );

        double t = pageX;

        pageX = pageY;

        pageY = t;

      }

    setClip(0, 0, (int)pageX, (int)pageY);

    out.println("gsave % first save");

    // 595x842; 612x792 respectively

    out.println("<< /PageSize [" +pageX + " "+pageY+ "] >> setpagedevice");

    if( pageFormat.getOrientation() != PageFormat.LANDSCAPE )

      {

        pageTransform.translate(pageX, 0);

        pageTransform.scale(-1.0, 1.0);

      }

    // save the original CTM

    pushCTM();

    concatCTM(pageTransform);

    setTransform(new AffineTransform());

    out.println("%%EndPageSetup");

    out.println("gsave");

    if( printable.print(this, pageFormat, index) == Printable.NO_SUCH_PAGE )

      return Printable.NO_SUCH_PAGE;

    out.println("grestore");

    out.println("showpage");

    return Printable.PAGE_EXISTS;

  }

  /** push the Current Transformation Matrix onto the PS stack */

  private void pushCTM()

  {

    out.println("matrix currentmatrix   % pushCTM()");

  }

  /** pop the Current Transformation Matrix from the PS stack */

  private void popCTM()

  {

    out.println("setmatrix % restore CTM");

  }

  ///////////////////////////////////////////////////////////////////////////

  public Graphics create()

  {

    return null;

  }

  public void drawOval(int x, int y, int width, int height)

  {

    out.println("% drawOval()");

    setStroke(ordinaryStroke);

    draw(new Ellipse2D.Double(x, y, width, height));

    setStroke(currentStroke);

  }

  public void drawPolyline(int[] xPoints, int[] yPoints, int nPoints)

  {

    if (nPoints <= 0 || xPoints.length < nPoints || yPoints.length < nPoints)

      return;

    out.println("newpath % drawPolyLine()");

    out.println(xPoints[0] + " " + yPoints[0] + " moveto");

    for (int i = 1; i < nPoints; i++)

      out.println(xPoints[i] + " " + yPoints[i] + " lineto");

    out.println("closepath");

    out.println("stroke");

  }

  public void drawRoundRect(int x, int y, int width, int height, int arcWidth,

                            int arcHeight)

  {

    out.println("% drawRoundRect()");

    RoundRectangle2D.Double rr = new RoundRectangle2D.Double(x, y, width,

                                                             height, arcWidth,

                                                             arcHeight);

    setStroke(ordinaryStroke);

    draw(rr);

    setStroke(currentStroke);

  }

  public void fillRoundRect(int x, int y, int width, int height, int arcWidth,

                            int arcHeight)

  {

    out.println("% fillRoundRect()");

    RoundRectangle2D.Double rr = new RoundRectangle2D.Double(x, y, width,

                                                             height, arcWidth,

                                                             arcHeight);

    fill(rr);

  }

  public void drawArc(int x, int y, int width, int height, int startAngle,

                      int arcAngle)

  {

    setStroke(ordinaryStroke);

    draw(new Arc2D.Double(x, y, width, height, startAngle, arcAngle, Arc2D.OPEN));

    setStroke(currentStroke);

  }

  public void fillArc(int x, int y, int width, int height, int startAngle,

                      int arcAngle)

  {

    fill(new Arc2D.Double(x, y, width, height, startAngle, arcAngle, Arc2D.PIE));

  }

  public void fillOval(int x, int y, int width, int height)

  {

    out.println("% fillOval()");

    fill( new Ellipse2D.Double(x, y, width, height) );

  }

  public void fillPolygon(int[] x, int[] y, int nPoints)

  {

    out.println("% fillPolygon()");

    fill( new Polygon(x, y, nPoints) );

  }

  public void drawLine(int x1, int y1, int x2, int y2)

  {

    out.println("% drawLine()");

    setStroke(ordinaryStroke);

    out.println("newpath");

    out.println(x1 + " " + (y1) + " moveto");

    out.println(x2 + " " + (y2) + " lineto");

    out.println("stroke");

    setStroke(currentStroke);

  }

  //--------------- Image drawing ------------------------------------------

  public boolean drawImage(Image img, int x, int y, Color bgcolor,

                           ImageObserver observer)

  {

    int w = img.getWidth(null);

    int h = img.getHeight(null);

    return drawImage(img, x, y, x + w, y + h, 0, 0, w - 1, h - 1, bgcolor,

                     observer);

  }

  public boolean drawImage(Image img, int dx1, int dy1, int dx2, int dy2,

                           int sx1, int sy1, int sx2, int sy2, Color bgcolor,

                           ImageObserver observer)

  {

    int n = 0;

    boolean flipx = false;

    boolean flipy = false;

    // swap X and Y's

    if (sx1 > sx2)

      {

        n = sx1;

        sx1 = sx2;

        sx2 = n;

        flipx = ! flipx;

      }

    if (sy1 > sy2)

      {

        n = sy1;

        sy1 = sy2;

        sy2 = n;

        flipy = ! flipy;

      }

    if (dx1 > dx2)

      {

        n = dx1;

        dx1 = dx2;

        dx2 = n;

        flipx = ! flipx;

      }

    if (dy1 > dy2)

      {

        n = dy1;

        dy1 = dy2;

        dy2 = n;

        flipy = ! flipy;

      }

    n = 0;

    int sw = sx2 - sx1; // source width

    int sh = sy2 - sy1; // source height

    int[] pixels = new int[sw * sh]; // pixel buffer

    int dw = dx2 - dx1; // destination width

    int dh = dy2 - dy1; // destination height

    double x_scale = ((double) dw) / ((double) sw);

    double y_scale = ((double) dh) / ((double) sh);

    out.println("% drawImage() 2");

    out.println("gsave");

    out.println(dx1 + " " + dy1 + " translate");

    out.println(dw + " " + dh + " scale");

    out.println(sw + " " + sh + " 8 [" + (flipx ? -sw : sw) + " 0 0 "

                + (flipy ? -sh : sh) + " " + (flipx ? sw : 0) + " "

                + (flipy ? sh : 0) + " ]");

    out.println("{currentfile 3 string readhexstring pop} bind");

    out.println("false 3 colorimage");

    PixelGrabber pg = new PixelGrabber(img, sx1, sy1, sw, sh, pixels, 0, sw);

    try

      {

        pg.grabPixels();

      }

    catch (InterruptedException e)

      {

        System.err.println("interrupted waiting for pixels!");

        return (false);

      }

    if ((pg.getStatus() & ImageObserver.ABORT) != 0)

      {

        System.err.println("image fetch aborted or errored");

        return (false);

      }

    for (int j = 0; j < sh; j++)

      {

        for (int i = 0; i < sw; i++)

          {

            out.print(colorTripleHex(new Color(pixels[j * sw + i])));

            if (((++n) % 11) == 0)

              out.println();

          }

      }

    out.println();

    out.println("%%EOF");

    out.println("grestore");

    return true;

  }

  public boolean drawImage(Image img, int dx1, int dy1, int dx2, int dy2,

                           int sx1, int sy1, int sx2, int sy2,

                           ImageObserver observer)

  {

    return drawImage(img, dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2, null,

                     observer);

  }

  public boolean drawImage(Image img, int x, int y, ImageObserver observer)

  {

    return drawImage(img, x, y, null, observer);

  }

  public boolean drawImage(Image img, int x, int y, int width, int height,

                           Color bgcolor, ImageObserver observer)

  {

    int sw = img.getWidth(null);

    int sh = img.getHeight(null);

    return drawImage(img, x, y, x + width, y + height, /* destination */

                     0, 0, sw - 1, sh - 1, /* source */

                     bgcolor, observer);

    // correct?

  }

  public boolean drawImage(Image img, int x, int y, int width, int height,

                           ImageObserver observer)

  {

    return drawImage(img, x, y, width, height, null, observer);

  }

  /** Renders a BufferedImage that is filtered with a BufferedImageOp. */

  public void drawImage(BufferedImage img, BufferedImageOp op, int x, int y)

  {

    BufferedImage result = op.filter(img, null);

    drawImage(result, x, y, null);

  }

  /** Renders an image, applying a transform from image space

      into user space before drawing. */

  public boolean drawImage(Image img, AffineTransform xform, ImageObserver obs)

  {

    AffineTransform oldTransform = new AffineTransform(currentTransform);

    boolean ret;

    transform(xform);

    ret = drawImage(img, 0, 0, null, obs);

    setTransform(oldTransform);

    return ret;

  }

  /** Renders a RenderableImage, applying a transform from image

      space into user space before drawing. */

  public void drawRenderableImage(RenderableImage img, AffineTransform xform)

  {

    // FIXME

  }

  /** Renders a RenderedImage, applying a transform from

      image space into user space before drawing. */

  public void drawRenderedImage(RenderedImage img, AffineTransform xform)

  {

    // FIXME

  }

  //-------------------------------------------------------------------------

  public void drawPolygon(int[] xPoints, int[] yPoints, int nPoints)

  {

    setStroke(ordinaryStroke);

    draw(new Polygon(xPoints, yPoints, nPoints));

    setStroke(currentStroke);

  }

  public void drawString(String str, int x, int y)

  {

    drawString(str, (float) x, (float) y);

  }

  public void drawString(String str, float x, float y)

  {

    if( str.trim().equals("") )

      return; // don't draw whitespace, silly!

    if( currentFontIsPS )

      {

        drawStringPSFont(str, x, y);

        return;

      }

    TextLayout text = new TextLayout(str, currentFont, getFontRenderContext());

    Shape s = text.getOutline(AffineTransform.getTranslateInstance(x, y));

    drawStringShape(s);

  }

  private void drawStringPSFont(String str, float x, float y)

  {

    out.println("% drawString PS font");

    out.println(x + " " + y + " moveto");

    saveAndInvertAxis();

    out.println("(" + str + ") show");

    restoreAxis();

  }

  private void saveAndInvertAxis()

  {

    // Invert the Y axis of the CTM.

    popCTM();

    pushCTM();

    double[] test =

      {

        pageTransform.getScaleX(), pageTransform.getShearY(),

        pageTransform.getShearX(), pageTransform.getScaleY(),

        pageTransform.getTranslateX(),

        -pageTransform.getTranslateY() + pageY

      };

    double[] test2 =

      {

        currentTransform.getScaleX(),

        currentTransform.getShearY(),

        -currentTransform.getShearX(),

        -currentTransform.getScaleY(),

        currentTransform.getTranslateX(),

        currentTransform.getTranslateY()

      };