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PostScriptRenderer.java
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PostScriptRenderer.java
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/*
* Copyright 2015 Robin Stuart, Daniel Gredler
*
* Licensed 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.
*/
package uk.org.okapibarcode.output;
import static uk.org.okapibarcode.backend.HumanReadableAlignment.CENTER;
import static uk.org.okapibarcode.backend.HumanReadableAlignment.JUSTIFY;
import static uk.org.okapibarcode.util.Doubles.roughlyEqual;
import java.awt.Color;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.OutputStream;
import uk.org.okapibarcode.backend.Hexagon;
import uk.org.okapibarcode.backend.HumanReadableAlignment;
import uk.org.okapibarcode.backend.Symbol;
import uk.org.okapibarcode.backend.TextBox;
/**
* Renders symbologies to EPS (Encapsulated PostScript).
*
* @author <a href="mailto:[email protected]">Robin Stuart</a>
* @author Daniel Gredler
*/
public class PostScriptRenderer implements SymbolRenderer {
/** The output stream to render to. */
private final OutputStream out;
/** The magnification factor to apply. */
private final double magnification;
/** The paper (background) color. */
private final Color paper;
/** The ink (foreground) color. */
private final Color ink;
/**
* Creates a new PostScript renderer.
*
* @param out the output stream to render to
* @param magnification the magnification factor to apply
* @param paper the paper (background) color
* @param ink the ink (foreground) color
*/
public PostScriptRenderer(OutputStream out, double magnification, Color paper, Color ink) {
this.out = out;
this.magnification = magnification;
this.paper = paper;
this.ink = ink;
}
/** {@inheritDoc} */
@Override
public void render(Symbol symbol) throws IOException {
// All y dimensions are reversed because EPS origin (0,0) is at the bottom left, not top left
String content = symbol.getContent();
int width = (int) (symbol.getWidth() * magnification);
int height = (int) (symbol.getHeight() * magnification);
int marginX = (int) (symbol.getQuietZoneHorizontal() * magnification);
int marginY = (int) (symbol.getQuietZoneVertical() * magnification);
String title;
if (content == null || content.isEmpty()) {
title = "OkapiBarcode Generated Symbol";
} else {
title = content;
}
try (ExtendedOutputStreamWriter writer = new ExtendedOutputStreamWriter(out, "%.2f")) {
// Header
writer.append("%!PS-Adobe-3.0 EPSF-3.0\n");
writer.append("%%Creator: OkapiBarcode\n");
writer.append("%%Title: ").append(title).append('\n');
writer.append("%%Pages: 0\n");
writer.append("%%BoundingBox: 0 0 ").appendInt(width).append(" ").appendInt(height).append("\n");
writer.append("%%EndComments\n");
// Definitions
writer.append("/TL { setlinewidth moveto lineto stroke } bind def\n");
writer.append("/TC { moveto 0 360 arc 360 0 arcn fill } bind def\n");
writer.append("/TH { 0 setlinewidth moveto lineto lineto lineto lineto lineto closepath fill } bind def\n");
writer.append("/TB { 2 copy } bind def\n");
writer.append("/TR { newpath 4 1 roll exch moveto 1 index 0 rlineto 0 exch rlineto neg 0 rlineto closepath fill } bind def\n");
writer.append("/TE { pop pop } bind def\n");
// Background
writer.append("newpath\n");
writer.append(ink.getRed() / 255.0).append(" ")
.append(ink.getGreen() / 255.0).append(" ")
.append(ink.getBlue() / 255.0).append(" setrgbcolor\n");
writer.append(paper.getRed() / 255.0).append(" ")
.append(paper.getGreen() / 255.0).append(" ")
.append(paper.getBlue() / 255.0).append(" setrgbcolor\n");
writer.append(height).append(" 0.00 TB 0.00 ").append(width).append(" TR\n");
// Rectangles
for (int i = 0; i < symbol.getRectangles().size(); i++) {
Rectangle2D.Double rect = symbol.getRectangles().get(i);
if (i == 0) {
writer.append("TE\n");
writer.append(ink.getRed() / 255.0).append(" ")
.append(ink.getGreen() / 255.0).append(" ")
.append(ink.getBlue() / 255.0).append(" setrgbcolor\n");
writer.append(rect.height * magnification).append(" ")
.append(height - ((rect.y + rect.height) * magnification) - marginY).append(" TB ")
.append((rect.x * magnification) + marginX).append(" ")
.append(rect.width * magnification).append(" TR\n");
} else {
Rectangle2D.Double prev = symbol.getRectangles().get(i - 1);
if (!roughlyEqual(rect.height, prev.height) || !roughlyEqual(rect.y, prev.y)) {
writer.append("TE\n");
writer.append(ink.getRed() / 255.0).append(" ")
.append(ink.getGreen() / 255.0).append(" ")
.append(ink.getBlue() / 255.0).append(" setrgbcolor\n");
writer.append(rect.height * magnification).append(" ")
.append(height - ((rect.y + rect.height) * magnification) - marginY).append(" ");
}
writer.append("TB ").append((rect.x * magnification) + marginX).append(" ").append(rect.width * magnification).append(" TR\n");
}
}
// Text
for (int i = 0; i < symbol.getTexts().size(); i++) {
TextBox text = symbol.getTexts().get(i);
HumanReadableAlignment alignment = (text.alignment == JUSTIFY && text.text.length() == 1 ? CENTER : text.alignment);
if (i == 0) {
writer.append("TE\n");;
writer.append(ink.getRed() / 255.0).append(" ")
.append(ink.getGreen() / 255.0).append(" ")
.append(ink.getBlue() / 255.0).append(" setrgbcolor\n");
}
writer.append("matrix currentmatrix\n");
writer.append("/").append(symbol.getFontName()).append(" findfont\n");
writer.append(symbol.getFontSize() * magnification).append(" scalefont setfont\n");
double y = height - (text.y * magnification) - marginY;
switch (alignment) {
case LEFT:
double leftX = (magnification * text.x) + marginX;
writer.append(" 0 0 moveto ").append(leftX).append(" ").append(y)
.append(" translate 0.00 rotate 0 0 moveto\n");
writer.append(" (").append(text.text).append(") show\n");
break;
case JUSTIFY:
double textX = (magnification * text.x) + marginX;
double textW = (magnification * text.width);
writer.append(" 0 0 moveto ").append(textX).append(" ").append(y)
.append(" translate 0.00 rotate 0 0 moveto\n");
writer.append(" (").append(text.text).append(") dup stringwidth pop ")
.append(textW).append(" sub neg 1 index length 1 sub div 0")
.append(" 3 -1 roll ashow\n");
break;
case RIGHT:
double rightX = (magnification * text.x) + (magnification * text.width) + marginX;
writer.append(" 0 0 moveto ").append(rightX).append(" ").append(y)
.append(" translate 0.00 rotate 0 0 moveto\n");
writer.append(" (").append(text.text).append(") stringwidth\n");
writer.append("pop\n");
writer.append("-1 mul 0 rmoveto\n");
writer.append(" (").append(text.text).append(") show\n");
break;
case CENTER:
double centerX = (magnification * text.x) + (magnification * text.width / 2) + marginX;
writer.append(" 0 0 moveto ").append(centerX).append(" ").append(y)
.append(" translate 0.00 rotate 0 0 moveto\n");
writer.append(" (").append(text.text).append(") stringwidth\n");
writer.append("pop\n");
writer.append("-2 div 0 rmoveto\n");
writer.append(" (").append(text.text).append(") show\n");
break;
default:
throw new IllegalStateException("Unknown alignment: " + alignment);
}
writer.append("setmatrix\n");
}
// Circles
// Because MaxiCode size is fixed, this ignores magnification
for (int i = 0; i < symbol.getTarget().size(); i += 2) {
Ellipse2D.Double ellipse1 = symbol.getTarget().get(i);
Ellipse2D.Double ellipse2 = symbol.getTarget().get(i + 1);
if (i == 0) {
writer.append("TE\n");
writer.append(ink.getRed() / 255.0).append(" ")
.append(ink.getGreen() / 255.0).append(" ")
.append(ink.getBlue() / 255.0).append(" setrgbcolor\n");
writer.append(ink.getRed() / 255.0).append(" ")
.append(ink.getGreen() / 255.0).append(" ")
.append(ink.getBlue() / 255.0).append(" setrgbcolor\n");
}
double x1 = ellipse1.x + (ellipse1.width / 2);
double x2 = ellipse2.x + (ellipse2.width / 2);
double y1 = height - ellipse1.y - (ellipse1.width / 2);
double y2 = height - ellipse2.y - (ellipse2.width / 2);
double r1 = ellipse1.width / 2;
double r2 = ellipse2.width / 2;
writer.append(x1 + marginX)
.append(" ").append(y1 - marginY)
.append(" ").append(r1)
.append(" ").append(x2 + marginX)
.append(" ").append(y2 - marginY)
.append(" ").append(r2)
.append(" ").append(x2 + r2 + marginX)
.append(" ").append(y2 - marginY)
.append(" TC\n");
}
// Hexagons
// Because MaxiCode size is fixed, this ignores magnification
for (int i = 0; i < symbol.getHexagons().size(); i++) {
Hexagon hexagon = symbol.getHexagons().get(i);
for (int j = 0; j < 6; j++) {
writer.append(hexagon.pointX[j] + marginX).append(" ").append((height - hexagon.pointY[j]) - marginY).append(" ");
}
writer.append(" TH\n");
}
// Footer
writer.append("\nshowpage\n");
}
}
}