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org.apache.fop.render.pcl.PCLGraphics2D Maven / Gradle / Ivy
/*
* 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: PCLGraphics2D.java 1618496 2014-08-17 18:56:01Z gadams $ */
package org.apache.fop.render.pcl;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.Image;
import java.awt.Paint;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.font.FontRenderContext;
import java.awt.font.GlyphVector;
import java.awt.geom.AffineTransform;
import java.awt.geom.PathIterator;
import java.awt.geom.Point2D;
import java.awt.image.BufferedImage;
import java.awt.image.ImageObserver;
import java.awt.image.RenderedImage;
import java.awt.image.renderable.RenderableImage;
import java.io.IOException;
import java.text.AttributedCharacterIterator;
import org.apache.xmlgraphics.java2d.AbstractGraphics2D;
import org.apache.xmlgraphics.java2d.GraphicContext;
import org.apache.xmlgraphics.java2d.GraphicsConfigurationWithTransparency;
import org.apache.xmlgraphics.util.UnitConv;
/**
* Graphics2D implementation implementing PCL and HP GL/2.
* Note: This class cannot be used stand-alone to create full PCL documents.
*/
public class PCLGraphics2D extends AbstractGraphics2D {
/** The PCL generator */
protected PCLGenerator gen;
private static final boolean FAIL_ON_UNSUPPORTED_FEATURE = true;
private boolean clippingDisabled;
/**
* Create a new PCLGraphics2D.
* @param gen the PCL Generator to paint with
*/
public PCLGraphics2D(PCLGenerator gen) {
super(true);
this.gen = gen;
}
/**
* Copy constructor
* @param g parent PCLGraphics2D
*/
public PCLGraphics2D(PCLGraphics2D g) {
super(true);
this.gen = g.gen;
}
/** {@inheritDoc} */
public Graphics create() {
PCLGraphics2D copy = new PCLGraphics2D(this);
copy.setGraphicContext((GraphicContext)getGraphicContext().clone());
return copy;
}
/** {@inheritDoc} */
public void dispose() {
this.gen = null;
}
/**
* Sets the GraphicContext
* @param c GraphicContext to use
*/
public void setGraphicContext(GraphicContext c) {
this.gc = c;
}
/**
* Allows to disable all clipping operations.
* @param value true if clipping should be disabled.
*/
public void setClippingDisabled(boolean value) {
this.clippingDisabled = value;
}
/**
* Central handler for IOExceptions for this class.
* @param ioe IOException to handle
*/
public void handleIOException(IOException ioe) {
//TODO Surely, there's a better way to do this.
ioe.printStackTrace();
}
/**
* Raises an UnsupportedOperationException if this instance is configured to do so and an
* unsupported feature has been requested. Clients can make use of this to fall back to
* a more compatible way of painting a PCL graphic.
* @param msg the error message to be displayed
*/
protected void handleUnsupportedFeature(String msg) {
if (FAIL_ON_UNSUPPORTED_FEATURE) {
throw new UnsupportedOperationException(msg);
}
}
/** {@inheritDoc} */
public GraphicsConfiguration getDeviceConfiguration() {
return new GraphicsConfigurationWithTransparency();
}
/**
* Applies a new Stroke object.
* @param stroke Stroke object to use
* @throws IOException In case of an I/O problem
*/
protected void applyStroke(Stroke stroke) throws IOException {
if (stroke instanceof BasicStroke) {
BasicStroke bs = (BasicStroke)stroke;
float[] da = bs.getDashArray();
if (da != null) {
gen.writeText("UL1,");
int len = Math.min(20, da.length);
float patternLen = 0.0f;
for (int idx = 0; idx < len; idx++) {
patternLen += da[idx];
}
if (len == 1) {
patternLen *= 2;
}
for (int idx = 0; idx < len; idx++) {
float perc = da[idx] * 100 / patternLen;
gen.writeText(gen.formatDouble2(perc));
if (idx < da.length - 1) {
gen.writeText(",");
}
}
if (len == 1) {
gen.writeText("," + gen.formatDouble2(da[0] * 100 / patternLen));
}
gen.writeText(";");
/* TODO Dash phase NYI
float offset = bs.getDashPhase();
gen.writeln(gen.formatDouble4(offset) + " setdash");
*/
Point2D ptLen = new Point2D.Double(patternLen, 0);
//interpret as absolute length
getTransform().deltaTransform(ptLen, ptLen);
double transLen = UnitConv.pt2mm(ptLen.distance(0, 0));
gen.writeText("LT1," + gen.formatDouble4(transLen) + ",1;");
} else {
gen.writeText("LT;");
}
gen.writeText("LA1"); //line cap
int ec = bs.getEndCap();
switch (ec) {
case BasicStroke.CAP_BUTT:
gen.writeText(",1");
break;
case BasicStroke.CAP_ROUND:
gen.writeText(",4");
break;
case BasicStroke.CAP_SQUARE:
gen.writeText(",2");
break;
default: System.err.println("Unsupported line cap: " + ec);
}
gen.writeText(",2"); //line join
int lj = bs.getLineJoin();
switch (lj) {
case BasicStroke.JOIN_MITER:
gen.writeText(",1");
break;
case BasicStroke.JOIN_ROUND:
gen.writeText(",4");
break;
case BasicStroke.JOIN_BEVEL:
gen.writeText(",5");
break;
default: System.err.println("Unsupported line join: " + lj);
}
float ml = bs.getMiterLimit();
gen.writeText(",3" + gen.formatDouble4(ml));
float lw = bs.getLineWidth();
Point2D ptSrc = new Point2D.Double(lw, 0);
//Pen widths are set as absolute metric values (WU0;)
Point2D ptDest = getTransform().deltaTransform(ptSrc, null);
double transDist = UnitConv.pt2mm(ptDest.distance(0, 0));
//System.out.println("--" + ptDest.distance(0, 0) + " " + transDist);
gen.writeText(";PW" + gen.formatDouble4(transDist) + ";");
} else {
handleUnsupportedFeature("Unsupported Stroke: " + stroke.getClass().getName());
}
}
/**
* Applies a new Paint object.
* @param paint Paint object to use
* @throws IOException In case of an I/O problem
*/
protected void applyPaint(Paint paint) throws IOException {
if (paint instanceof Color) {
Color col = (Color)paint;
int shade = gen.convertToPCLShade(col);
gen.writeText("TR0;FT10," + shade + ";");
} else {
handleUnsupportedFeature("Unsupported Paint: " + paint.getClass().getName());
}
}
private void writeClip(Shape imclip) throws IOException {
if (clippingDisabled) {
return;
}
if (imclip == null) {
//gen.writeText("IW;");
} else {
handleUnsupportedFeature("Clipping is not supported. Shape: " + imclip);
/* This is an attempt to clip using the "InputWindow" (IW) but this only allows to
* clip a rectangular area. Force falling back to bitmap mode for now.
Rectangle2D bounds = imclip.getBounds2D();
Point2D p1 = new Point2D.Double(bounds.getX(), bounds.getY());
Point2D p2 = new Point2D.Double(
bounds.getX() + bounds.getWidth(), bounds.getY() + bounds.getHeight());
getTransform().transform(p1, p1);
getTransform().transform(p2, p2);
gen.writeText("IW" + gen.formatDouble4(p1.getX())
+ "," + gen.formatDouble4(p2.getY())
+ "," + gen.formatDouble4(p2.getX())
+ "," + gen.formatDouble4(p1.getY()) + ";");
*/
}
}
/** {@inheritDoc} */
public void draw(Shape s) {
try {
AffineTransform trans = getTransform();
Shape imclip = getClip();
writeClip(imclip);
if (!Color.black.equals(getColor())) {
//TODO PCL 5 doesn't support colored pens, PCL5c has a pen color (PC) command
handleUnsupportedFeature("Only black is supported as stroke color: " + getColor());
}
applyStroke(getStroke());
PathIterator iter = s.getPathIterator(trans);
processPathIteratorStroke(iter);
writeClip(null);
} catch (IOException ioe) {
handleIOException(ioe);
}
}
/** {@inheritDoc} */
public void fill(Shape s) {
try {
AffineTransform trans = getTransform();
Shape imclip = getClip();
writeClip(imclip);
applyPaint(getPaint());
PathIterator iter = s.getPathIterator(trans);
processPathIteratorFill(iter);
writeClip(null);
} catch (IOException ioe) {
handleIOException(ioe);
}
}
/**
* Processes a path iterator generating the nexessary painting operations.
* @param iter PathIterator to process
* @throws IOException In case of an I/O problem.
*/
public void processPathIteratorStroke(PathIterator iter) throws IOException {
gen.writeText("\n");
double[] vals = new double[6];
boolean penDown = false;
double x = 0;
double y = 0;
StringBuffer sb = new StringBuffer(256);
penUp(sb);
while (!iter.isDone()) {
int type = iter.currentSegment(vals);
if (type == PathIterator.SEG_CLOSE) {
gen.writeText("PM;");
gen.writeText(sb.toString());
gen.writeText("PM2;EP;");
sb.setLength(0);
iter.next();
continue;
} else if (type == PathIterator.SEG_MOVETO) {
gen.writeText(sb.toString());
sb.setLength(0);
if (penDown) {
penUp(sb);
penDown = false;
}
} else {
if (!penDown) {
penDown(sb);
penDown = true;
}
}
switch (type) {
case PathIterator.SEG_CLOSE:
break;
case PathIterator.SEG_MOVETO:
x = vals[0];
y = vals[1];
plotAbsolute(x, y, sb);
gen.writeText(sb.toString());
sb.setLength(0);
break;
case PathIterator.SEG_LINETO:
x = vals[0];
y = vals[1];
plotAbsolute(x, y, sb);
break;
case PathIterator.SEG_CUBICTO:
x = vals[4];
y = vals[5];
bezierAbsolute(vals[0], vals[1], vals[2], vals[3], x, y, sb);
break;
case PathIterator.SEG_QUADTO:
double originX = x;
double originY = y;
x = vals[2];
y = vals[3];
quadraticBezierAbsolute(originX, originY, vals[0], vals[1], x, y, sb);
break;
default:
break;
}
iter.next();
}
sb.append("\n");
gen.writeText(sb.toString());
}
/**
* Processes a path iterator generating the nexessary painting operations.
* @param iter PathIterator to process
* @throws IOException In case of an I/O problem.
*/
public void processPathIteratorFill(PathIterator iter) throws IOException {
gen.writeText("\n");
double[] vals = new double[6];
boolean penDown = false;
double x = 0;
double y = 0;
boolean pendingPM0 = true;
StringBuffer sb = new StringBuffer(256);
penUp(sb);
while (!iter.isDone()) {
int type = iter.currentSegment(vals);
if (type == PathIterator.SEG_CLOSE) {
sb.append("PM1;");
iter.next();
continue;
} else if (type == PathIterator.SEG_MOVETO) {
if (penDown) {
penUp(sb);
penDown = false;
}
} else {
if (!penDown) {
penDown(sb);
penDown = true;
}
}
switch (type) {
case PathIterator.SEG_MOVETO:
x = vals[0];
y = vals[1];
plotAbsolute(x, y, sb);
break;
case PathIterator.SEG_LINETO:
x = vals[0];
y = vals[1];
plotAbsolute(x, y, sb);
break;
case PathIterator.SEG_CUBICTO:
x = vals[4];
y = vals[5];
bezierAbsolute(vals[0], vals[1], vals[2], vals[3], x, y, sb);
break;
case PathIterator.SEG_QUADTO:
double originX = x;
double originY = y;
x = vals[2];
y = vals[3];
quadraticBezierAbsolute(originX, originY, vals[0], vals[1], x, y, sb);
break;
default:
throw new IllegalStateException("Must not get here");
}
if (pendingPM0) {
pendingPM0 = false;
sb.append("PM;");
}
iter.next();
}
sb.append("PM2;");
fillPolygon(iter.getWindingRule(), sb);
sb.append("\n");
gen.writeText(sb.toString());
}
private void fillPolygon(int windingRule, StringBuffer sb) {
int fillMethod = (windingRule == PathIterator.WIND_EVEN_ODD ? 0 : 1);
sb.append("FP").append(fillMethod).append(";");
}
private void plotAbsolute(double x, double y, StringBuffer sb) {
sb.append("PA").append(gen.formatDouble4(x));
sb.append(",").append(gen.formatDouble4(y)).append(";");
}
private void bezierAbsolute(double x1, double y1, double x2, double y2, double x3, double y3,
StringBuffer sb) {
sb.append("BZ").append(gen.formatDouble4(x1));
sb.append(",").append(gen.formatDouble4(y1));
sb.append(",").append(gen.formatDouble4(x2));
sb.append(",").append(gen.formatDouble4(y2));
sb.append(",").append(gen.formatDouble4(x3));
sb.append(",").append(gen.formatDouble4(y3)).append(";");
}
private void quadraticBezierAbsolute(double originX, double originY,
double x1, double y1, double x2, double y2, StringBuffer sb) {
//Quadratic Bezier curve can be mapped to a normal bezier curve
//See http://pfaedit.sourceforge.net/bezier.html
double nx1 = originX + (2.0 / 3.0) * (x1 - originX);
double ny1 = originY + (2.0 / 3.0) * (y1 - originY);
double nx2 = nx1 + (1.0 / 3.0) * (x2 - originX);
double ny2 = ny1 + (1.0 / 3.0) * (y2 - originY);
bezierAbsolute(nx1, ny1, nx2, ny2, x2, y2, sb);
}
private void penDown(StringBuffer sb) {
sb.append("PD;");
}
private void penUp(StringBuffer sb) {
sb.append("PU;");
}
/** {@inheritDoc} */
public void drawString(String s, float x, float y) {
java.awt.Font awtFont = getFont();
FontRenderContext frc = getFontRenderContext();
GlyphVector gv = awtFont.createGlyphVector(frc, s);
Shape glyphOutline = gv.getOutline(x, y);
fill(glyphOutline);
}
/** {@inheritDoc} */
public void drawString(AttributedCharacterIterator iterator, float x,
float y) {
// TODO Auto-generated method stub
handleUnsupportedFeature("drawString NYI");
}
/** {@inheritDoc} */
public void drawRenderedImage(RenderedImage img, AffineTransform xform) {
handleUnsupportedFeature("Bitmap images are not supported");
}
/** {@inheritDoc} */
public void drawRenderableImage(RenderableImage img, AffineTransform xform) {
handleUnsupportedFeature("Bitmap images are not supported");
}
/** {@inheritDoc} */
public boolean drawImage(Image img, int x, int y, int width, int height,
ImageObserver observer) {
handleUnsupportedFeature("Bitmap images are not supported");
return false;
}
/** {@inheritDoc} */
public boolean drawImage(Image img, int x, int y, ImageObserver observer) {
handleUnsupportedFeature("Bitmap images are not supported");
return false;
/*
* First attempt disabled.
* Reasons: Lack of transparency control, positioning and rotation issues
final int width = img.getWidth(observer);
final int height = img.getHeight(observer);
if (width == -1 || height == -1) {
return false;
}
Dimension size = new Dimension(width, height);
BufferedImage buf = buildBufferedImage(size);
java.awt.Graphics2D g = buf.createGraphics();
try {
g.setComposite(AlphaComposite.SrcOver);
g.setBackground(new Color(255, 255, 255));
g.setPaint(new Color(255, 255, 255));
g.fillRect(0, 0, width, height);
g.clip(new Rectangle(0, 0, buf.getWidth(), buf.getHeight()));
if (!g.drawImage(img, 0, 0, observer)) {
return false;
}
} finally {
g.dispose();
}
try {
AffineTransform at = getTransform();
gen.enterPCLMode(false);
//Shape imclip = getClip(); Clipping is not available in PCL
Point2D p1 = new Point2D.Double(x, y);
at.transform(p1, p1);
pclContext.getTransform().transform(p1, p1);
gen.setCursorPos(p1.getX(), p1.getY());
gen.paintBitmap(buf, 72);
gen.enterHPGL2Mode(false);
} catch (IOException ioe) {
handleIOException(ioe);
}
return true;*/
}
/** {@inheritDoc} */
public void copyArea(int x, int y, int width, int height, int dx, int dy) {
// TODO Auto-generated method stub
handleUnsupportedFeature("copyArea NYI");
}
/** {@inheritDoc} */
public void setXORMode(Color c1) {
// TODO Auto-generated method stub
handleUnsupportedFeature("setXORMode NYI");
}
/**
* Used to create proper font metrics
*/
private Graphics2D fmg;
{
BufferedImage bi = new BufferedImage(1, 1,
BufferedImage.TYPE_INT_ARGB);
fmg = bi.createGraphics();
}
/**
* Creates a buffered image.
* @param size dimensions of the image to be created
* @return the buffered image
*/
protected BufferedImage buildBufferedImage(Dimension size) {
return new BufferedImage(size.width, size.height,
BufferedImage.TYPE_BYTE_GRAY);
}
/** {@inheritDoc} */
public java.awt.FontMetrics getFontMetrics(java.awt.Font f) {
return fmg.getFontMetrics(f);
}
}
