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- /*
- * 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.
- */
-
- /* $Id$ */
-
- package org.apache.fop.render.ps;
-
- import java.awt.Color;
- import java.awt.Point;
- import java.io.IOException;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.xmlgraphics.ps.PSGenerator;
-
- import org.apache.fop.fo.Constants;
- import org.apache.fop.render.intermediate.ArcToBezierCurveTransformer;
- import org.apache.fop.render.intermediate.BezierCurvePainter;
- import org.apache.fop.render.intermediate.BorderPainter;
- import org.apache.fop.render.intermediate.GraphicsPainter;
- import org.apache.fop.traits.RuleStyle;
- import org.apache.fop.util.ColorUtil;
-
- /**
- * PostScript-specific implementation of the {@link BorderPainter}.
- */
- public class PSGraphicsPainter implements GraphicsPainter, BezierCurvePainter {
-
- /** logging instance */
- private static Log log = LogFactory.getLog(PSGraphicsPainter.class);
-
- private final PSGenerator generator;
-
- /** Used for drawing arcs since PS does not natively support drawing elliptic curves */
- private final ArcToBezierCurveTransformer arcToBezierCurveTransformer;
-
- /**
- * Creates a new border painter for PostScript.
- * @param generator the PostScript generator
- */
- public PSGraphicsPainter(PSGenerator generator) {
- this.generator = generator;
- this.arcToBezierCurveTransformer = new ArcToBezierCurveTransformer(this);
- }
-
- /** {@inheritDoc} */
- public void drawBorderLine(int x1, int y1, int x2, int y2, boolean horz,
- boolean startOrBefore, int style, Color col) throws IOException {
- drawBorderLine(generator, toPoints(x1), toPoints(y1), toPoints(x2), toPoints(y2),
- horz, startOrBefore, style, col);
- }
-
- private static void drawLine(PSGenerator gen,
- float startx, float starty, float endx, float endy) throws IOException {
- gen.writeln(gen.formatDouble(startx) + " "
- + gen.formatDouble(starty) + " " + gen.mapCommand("moveto") + " "
- + gen.formatDouble(endx) + " "
- + gen.formatDouble(endy) + " " + gen.mapCommand("lineto") + " "
- + gen.mapCommand("stroke") + " " + gen.mapCommand("newpath"));
- }
-
- /** {@inheritDoc} */
- public static void drawBorderLine(PSGenerator gen,
- float x1, float y1, float x2, float y2, boolean horz,
- boolean startOrBefore, int style, Color col) throws IOException {
- float w = x2 - x1;
- float h = y2 - y1;
- if ((w < 0) || (h < 0)) {
- log.error("Negative extent received. Border won't be painted.");
- return;
- }
- switch (style) {
- case Constants.EN_DASHED:
- gen.useColor(col);
- if (horz) {
- float unit = Math.abs(2 * h);
- int rep = (int)(w / unit);
- if (rep % 2 == 0) {
- rep++;
- }
- unit = w / rep;
- gen.useDash("[" + unit + "] 0");
- gen.useLineCap(0);
- gen.useLineWidth(h);
- float ym = y1 + (h / 2);
- drawLine(gen, x1, ym, x2, ym);
- } else {
- float unit = Math.abs(2 * w);
- int rep = (int)(h / unit);
- if (rep % 2 == 0) {
- rep++;
- }
- unit = h / rep;
- gen.useDash("[" + unit + "] 0");
- gen.useLineCap(0);
- gen.useLineWidth(w);
- float xm = x1 + (w / 2);
- drawLine(gen, xm, y1, xm, y2);
- }
- break;
- case Constants.EN_DOTTED:
- gen.useColor(col);
- gen.useLineCap(1); //Rounded!
- if (horz) {
- float unit = Math.abs(2 * h);
- int rep = (int)(w / unit);
- if (rep % 2 == 0) {
- rep++;
- }
- unit = w / rep;
- gen.useDash("[0 " + unit + "] 0");
- gen.useLineWidth(h);
- float ym = y1 + (h / 2);
- drawLine(gen, x1, ym, x2, ym);
- } else {
- float unit = Math.abs(2 * w);
- int rep = (int)(h / unit);
- if (rep % 2 == 0) {
- rep++;
- }
- unit = h / rep;
- gen.useDash("[0 " + unit + "] 0");
- gen.useLineWidth(w);
- float xm = x1 + (w / 2);
- drawLine(gen, xm, y1, xm, y2);
- }
- break;
- case Constants.EN_DOUBLE:
- gen.useColor(col);
- gen.useDash(null);
- if (horz) {
- float h3 = h / 3;
- gen.useLineWidth(h3);
- float ym1 = y1 + (h3 / 2);
- float ym2 = ym1 + h3 + h3;
- drawLine(gen, x1, ym1, x2, ym1);
- drawLine(gen, x1, ym2, x2, ym2);
- } else {
- float w3 = w / 3;
- gen.useLineWidth(w3);
- float xm1 = x1 + (w3 / 2);
- float xm2 = xm1 + w3 + w3;
- drawLine(gen, xm1, y1, xm1, y2);
- drawLine(gen, xm2, y1, xm2, y2);
- }
- break;
- case Constants.EN_GROOVE:
- case Constants.EN_RIDGE:
- float colFactor = (style == Constants.EN_GROOVE ? 0.4f : -0.4f);
- gen.useDash(null);
- if (horz) {
- Color uppercol = ColorUtil.lightenColor(col, -colFactor);
- Color lowercol = ColorUtil.lightenColor(col, colFactor);
- float h3 = h / 3;
- gen.useLineWidth(h3);
- float ym1 = y1 + (h3 / 2);
- gen.useColor(uppercol);
- drawLine(gen, x1, ym1, x2, ym1);
- gen.useColor(col);
- drawLine(gen, x1, ym1 + h3, x2, ym1 + h3);
- gen.useColor(lowercol);
- drawLine(gen, x1, ym1 + h3 + h3, x2, ym1 + h3 + h3);
- } else {
- Color leftcol = ColorUtil.lightenColor(col, -colFactor);
- Color rightcol = ColorUtil.lightenColor(col, colFactor);
- float w3 = w / 3;
- gen.useLineWidth(w3);
- float xm1 = x1 + (w3 / 2);
- gen.useColor(leftcol);
- drawLine(gen, xm1, y1, xm1, y2);
- gen.useColor(col);
- drawLine(gen, xm1 + w3, y1, xm1 + w3, y2);
- gen.useColor(rightcol);
- drawLine(gen, xm1 + w3 + w3, y1, xm1 + w3 + w3, y2);
- }
- break;
- case Constants.EN_INSET:
- case Constants.EN_OUTSET:
- colFactor = (style == Constants.EN_OUTSET ? 0.4f : -0.4f);
- gen.useDash(null);
- if (horz) {
- Color c = ColorUtil.lightenColor(col, (startOrBefore ? 1 : -1) * colFactor);
- gen.useLineWidth(h);
- float ym1 = y1 + (h / 2);
- gen.useColor(c);
- drawLine(gen, x1, ym1, x2, ym1);
- } else {
- Color c = ColorUtil.lightenColor(col, (startOrBefore ? 1 : -1) * colFactor);
- gen.useLineWidth(w);
- float xm1 = x1 + (w / 2);
- gen.useColor(c);
- drawLine(gen, xm1, y1, xm1, y2);
- }
- break;
- case Constants.EN_HIDDEN:
- break;
- default:
- gen.useColor(col);
- gen.useDash(null);
- gen.useLineCap(0);
- if (horz) {
- gen.useLineWidth(h);
- float ym = y1 + (h / 2);
- drawLine(gen, x1, ym, x2, ym);
- } else {
- gen.useLineWidth(w);
- float xm = x1 + (w / 2);
- drawLine(gen, xm, y1, xm, y2);
- }
- }
- }
-
- /** {@inheritDoc} */
- public void drawLine(Point start, Point end,
- int width, Color color, RuleStyle style) throws IOException {
- if (start.y != end.y) {
- //TODO Support arbitrary lines if necessary
- throw new UnsupportedOperationException(
- "Can only deal with horizontal lines right now");
- }
-
- saveGraphicsState();
- int half = width / 2;
- int starty = start.y - half;
- //Rectangle boundingRect = new Rectangle(start.x, start.y - half, end.x - start.x, width);
-
- switch (style.getEnumValue()) {
- case Constants.EN_SOLID:
- case Constants.EN_DASHED:
- case Constants.EN_DOUBLE:
- drawBorderLine(start.x, starty, end.x, starty + width,
- true, true, style.getEnumValue(), color);
- break;
- case Constants.EN_DOTTED:
- clipRect(start.x, starty, end.x - start.x, width);
- //This displaces the dots to the right by half a dot's width
- //TODO There's room for improvement here
- generator.concatMatrix(1, 0, 0, 1, toPoints(half), 0);
- drawBorderLine(start.x, starty, end.x, starty + width,
- true, true, style.getEnumValue(), color);
- break;
- case Constants.EN_GROOVE:
- case Constants.EN_RIDGE:
- generator.useColor(ColorUtil.lightenColor(color, 0.6f));
- moveTo(start.x, starty);
- lineTo(end.x, starty);
- lineTo(end.x, starty + 2 * half);
- lineTo(start.x, starty + 2 * half);
- closePath();
- generator.write(" " + generator.mapCommand("fill"));
- generator.writeln(" " + generator.mapCommand("newpath"));
- generator.useColor(color);
- if (style == RuleStyle.GROOVE) {
- moveTo(start.x, starty);
- lineTo(end.x, starty);
- lineTo(end.x, starty + half);
- lineTo(start.x + half, starty + half);
- lineTo(start.x, starty + 2 * half);
- } else {
- moveTo(end.x, starty);
- lineTo(end.x, starty + 2 * half);
- lineTo(start.x, starty + 2 * half);
- lineTo(start.x, starty + half);
- lineTo(end.x - half, starty + half);
- }
- closePath();
- generator.write(" " + generator.mapCommand("fill"));
- generator.writeln(" " + generator.mapCommand("newpath"));
- break;
- default:
- throw new UnsupportedOperationException("rule style not supported");
- }
-
- restoreGraphicsState();
-
- }
-
- private static float toPoints(int mpt) {
- return mpt / 1000f;
- }
-
- /** {@inheritDoc} */
- public void moveTo(int x, int y) throws IOException {
- generator.writeln(generator.formatDouble(toPoints(x)) + " "
- + generator.formatDouble(toPoints(y)) + " " + generator.mapCommand("moveto"));
- }
-
- /** {@inheritDoc} */
- public void lineTo(int x, int y) throws IOException {
- generator.writeln(generator.formatDouble(toPoints(x)) + " "
- + generator.formatDouble(toPoints(y)) + " " + generator.mapCommand("lineto"));
- }
-
- /** {@inheritDoc} */
- public void arcTo(final double startAngle, final double endAngle, final int cx, final int cy,
- final int width, final int height) throws IOException {
- arcToBezierCurveTransformer.arcTo(startAngle, endAngle, cx, cy, width, height);
- }
-
- /** {@inheritDoc} */
- public void closePath() throws IOException {
- generator.writeln("cp");
- }
-
- private void clipRect(int x, int y, int width, int height) throws IOException {
- generator.defineRect(toPoints(x), toPoints(y), toPoints(width), toPoints(height));
- clip();
- }
-
- /** {@inheritDoc} */
- public void clip() throws IOException {
- generator.writeln(generator.mapCommand("clip") + " " + generator.mapCommand("newpath"));
- }
-
- /** {@inheritDoc} */
- public void saveGraphicsState() throws IOException {
- generator.saveGraphicsState();
- }
-
- /** {@inheritDoc} */
- public void restoreGraphicsState() throws IOException {
- generator.restoreGraphicsState();
- }
-
- /** {@inheritDoc} */
- public void rotateCoordinates(double angle) throws IOException {
- StringBuffer sb = new StringBuffer()
- .append(generator.formatDouble(angle * 180d / Math.PI))
- .append(" rotate ");
- generator.writeln(sb.toString());
- }
-
- /** {@inheritDoc} */
- public void translateCoordinates(int xTranslate, int yTranslate) throws IOException {
- StringBuffer sb = new StringBuffer()
- .append(generator.formatDouble(toPoints(xTranslate)))
- .append(" ")
- .append(generator.formatDouble(toPoints(yTranslate)))
- .append(" translate ");
- generator.writeln(sb.toString());
- }
-
- /** {@inheritDoc} */
- public void scaleCoordinates(float xScale, float yScale) throws IOException {
- StringBuffer sb = new StringBuffer()
- .append(generator.formatDouble(xScale))
- .append(" ")
- .append(generator.formatDouble(yScale))
- .append(" scale ");
- generator.writeln(sb.toString());
- }
-
- /** {@inheritDoc} */
- public void cubicBezierTo(int p1x, int p1y, int p2x, int p2y, int p3x, int p3y)
- throws IOException {
- StringBuffer sb = new StringBuffer()
- .append(generator.formatDouble(toPoints(p1x)))
- .append(" ")
- .append(generator.formatDouble(toPoints(p1y)))
- .append(" ")
- .append(generator.formatDouble(toPoints(p2x)))
- .append(" ")
- .append(generator.formatDouble(toPoints(p2y)))
- .append(" ")
- .append(generator.formatDouble(toPoints(p3x)))
- .append(" ")
- .append(generator.formatDouble(toPoints(p3y)))
- .append(" curveto ");
- generator.writeln(sb.toString());
- }
-
- }
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