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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.pdf;
-
- import java.awt.Color;
- import java.awt.Point;
- import java.awt.Rectangle;
- import java.io.IOException;
-
- 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.GraphicsPainter;
- import org.apache.fop.traits.RuleStyle;
- import org.apache.fop.util.ColorUtil;
-
- /**
- * PDF-specific implementation of the {@link GraphicsPainter}.
- */
- public class PDFGraphicsPainter implements GraphicsPainter, BezierCurvePainter {
-
- private final PDFContentGeneratorHelper generator;
-
- /** Used for drawing arcs since PS does not natively support drawing elliptic curves */
- private final ArcToBezierCurveTransformer arcToBezierCurveTransformer;
-
- public PDFGraphicsPainter(PDFContentGenerator generator) {
- this.generator = new PDFContentGeneratorHelper(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) {
- //TODO lose scale?
- drawBorderLine2(x1 / 1000f, y1 / 1000f, x2 / 1000f, y2 / 1000f,
- horz, startOrBefore, style, col);
- }
-
- /** {@inheritDoc} */
- private void drawBorderLine2(float x1, float y1, float x2, float y2, boolean horz,
- boolean startOrBefore, int style, Color col) {
- float w = x2 - x1;
- float h = y2 - y1;
- float colFactor;
- switch (style) {
- case Constants.EN_DASHED:
- generator.setColor(col);
- if (horz) {
- float unit = Math.abs(2 * h);
- int rep = (int) (w / unit);
- if (rep % 2 == 0) {
- rep++;
- }
- unit = w / rep;
- float ym = y1 + (h / 2);
- generator.setDashLine(unit)
- .setLineWidth(h)
- .strokeLine(x1, ym, x2, ym);
- } else {
- float unit = Math.abs(2 * w);
- int rep = (int) (h / unit);
- if (rep % 2 == 0) {
- rep++;
- }
- unit = h / rep;
- float xm = x1 + (w / 2);
- generator.setDashLine(unit)
- .setLineWidth(w)
- .strokeLine(xm, y1, xm, y2);
- }
- break;
- case Constants.EN_DOTTED:
- generator.setColor(col).setRoundCap();
- if (horz) {
- float unit = Math.abs(2 * h);
- int rep = (int) (w / unit);
- if (rep % 2 == 0) {
- rep++;
- }
- unit = w / rep;
- float ym = y1 + (h / 2);
- generator.setDashLine(0, unit)
- .setLineWidth(h)
- .strokeLine(x1, ym, x2, ym);
- } else {
- float unit = Math.abs(2 * w);
- int rep = (int) (h / unit);
- if (rep % 2 == 0) {
- rep++;
- }
- unit = h / rep;
- float xm = x1 + (w / 2);
- generator.setDashLine(0, unit)
- .setLineWidth(w)
- .strokeLine(xm, y1, xm, y2);
- }
- break;
- case Constants.EN_DOUBLE:
- generator.setColor(col)
- .setSolidLine();
- if (horz) {
- float h3 = h / 3;
- float ym1 = y1 + (h3 / 2);
- float ym2 = ym1 + h3 + h3;
- generator.setLineWidth(h3)
- .strokeLine(x1, ym1, x2, ym1)
- .strokeLine(x1, ym2, x2, ym2);
- } else {
- float w3 = w / 3;
- float xm1 = x1 + (w3 / 2);
- float xm2 = xm1 + w3 + w3;
- generator.setLineWidth(w3)
- .strokeLine(xm1, y1, xm1, y2)
- .strokeLine(xm2, y1, xm2, y2);
- }
- break;
- case Constants.EN_GROOVE:
- case Constants.EN_RIDGE:
- colFactor = (style == Constants.EN_GROOVE ? 0.4f : -0.4f);
- generator.setSolidLine();
- if (horz) {
- Color uppercol = ColorUtil.lightenColor(col, -colFactor);
- Color lowercol = ColorUtil.lightenColor(col, colFactor);
- float h3 = h / 3;
- float ym1 = y1 + (h3 / 2);
- generator.setLineWidth(h3)
- .setColor(uppercol)
- .strokeLine(x1, ym1, x2, ym1)
- .setColor(col)
- .strokeLine(x1, ym1 + h3, x2, ym1 + h3)
- .setColor(lowercol)
- .strokeLine(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;
- float xm1 = x1 + (w3 / 2);
- generator.setLineWidth(w3)
- .setColor(leftcol)
- .strokeLine(xm1, y1, xm1, y2)
- .setColor(col)
- .strokeLine(xm1 + w3, y1, xm1 + w3, y2)
- .setColor(rightcol)
- .strokeLine(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);
- generator.setSolidLine();
- Color c = col;
- if (horz) {
- c = ColorUtil.lightenColor(c, (startOrBefore ? 1 : -1) * colFactor);
- float ym1 = y1 + (h / 2);
- generator.setLineWidth(h)
- .setColor(c)
- .strokeLine(x1, ym1, x2, ym1);
- } else {
- c = ColorUtil.lightenColor(c, (startOrBefore ? 1 : -1) * colFactor);
- float xm1 = x1 + (w / 2);
- generator.setLineWidth(w)
- .setColor(c)
- .strokeLine(xm1, y1, xm1, y2);
- }
- break;
- case Constants.EN_HIDDEN:
- break;
- default:
- generator.setColor(col).setSolidLine();
- if (horz) {
- float ym = y1 + (h / 2);
- generator.setLineWidth(h)
- .strokeLine(x1, ym, x2, ym);
- } else {
- float xm = x1 + (w / 2);
- generator.setLineWidth(w)
- .strokeLine(xm, y1, xm, y2);
- }
- }
- }
-
- /** {@inheritDoc} */
- public void drawLine(Point start, Point end,
- int width, Color color, RuleStyle style) {
- 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, start.y - half, end.x, end.y + half,
- true, true, style.getEnumValue(), color);
- break;
- case Constants.EN_DOTTED:
- generator.clipRect(boundingRect)
- //This displaces the dots to the right by half a dot's width
- //TODO There's room for improvement here
- .transformCoordinatesLine(1, 0, 0 , 1, half, 0);
- drawBorderLine(start.x, start.y - half, end.x, end.y + half, true, true, style.getEnumValue(),
- color);
- break;
- case Constants.EN_GROOVE:
- case Constants.EN_RIDGE:
- generator.setFillColor(ColorUtil.lightenColor(color, 0.6f))
- .fillRect(start.x, start.y, end.x, starty + 2 * half)
- .setFillColor(color)
- .fillRidge(style, start.x, start.y, end.x, end.y, half);
- break;
- default:
- throw new UnsupportedOperationException("rule style not supported");
- }
- restoreGraphicsState();
- }
-
- private static String format(int coordinate) {
- //TODO lose scale?
- return format(coordinate / 1000f);
- }
-
- private static String format(float coordinate) {
- return PDFContentGenerator.format(coordinate);
- }
-
- /** {@inheritDoc} */
- public void moveTo(int x, int y) {
- generator.moveTo(x, y);
- }
-
- /** {@inheritDoc} */
- public void lineTo(int x, int y) {
- generator.lineTo(x, y);
- }
-
- /** {@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() {
- generator.closePath();
- }
-
- /** {@inheritDoc} */
- public void clip() {
- generator.clip();
- }
-
- /** {@inheritDoc} */
- public void saveGraphicsState() {
- generator.saveGraphicsState();
- }
-
- /** {@inheritDoc} */
- public void restoreGraphicsState() {
- generator.restoreGraphicsState();
- }
-
- /** {@inheritDoc} */
- public void rotateCoordinates(double angle) throws IOException {
- float s = (float) Math.sin(angle);
- float c = (float) Math.cos(angle);
- generator.transformFloatCoordinates(c, s, -s, c, 0, 0);
- }
-
- /** {@inheritDoc} */
- public void translateCoordinates(int xTranslate, int yTranslate) throws IOException {
- generator.transformCoordinates(1000, 0, 0, 1000, xTranslate, yTranslate);
- }
-
- /** {@inheritDoc} */
- public void scaleCoordinates(float xScale, float yScale) throws IOException {
- generator.transformFloatCoordinates(xScale, 0, 0, yScale, 0, 0);
- }
-
- /** {@inheritDoc} */
- public void cubicBezierTo(int p1x, int p1y, int p2x, int p2y, int p3x, int p3y) {
- generator.cubicBezierTo(p1x, p1y, p2x, p2y, p3x, p3y);
- }
-
- // TODO consider enriching PDFContentGenerator with part of this API
- private static class PDFContentGeneratorHelper {
-
- private final PDFContentGenerator generator;
-
- public PDFContentGeneratorHelper(PDFContentGenerator generator) {
- this.generator = generator;
- }
-
- public PDFContentGeneratorHelper moveTo(int x, int y) {
- return add("m", format(x), format(y));
- }
-
- public PDFContentGeneratorHelper lineTo(int x, int y) {
- return add("l", format(x), format(y));
- }
-
- /** {@inheritDoc} */
- public PDFContentGeneratorHelper cubicBezierTo(int p1x, int p1y, int p2x, int p2y, int p3x, int p3y) {
- return add("c", format(p1x), format(p1y), format(p2x), format(p2y), format(p3x), format(p3y));
- }
-
- public PDFContentGeneratorHelper closePath() {
- return add("h");
- }
-
- public PDFContentGeneratorHelper clip() {
- return addLine("W\nn");
- }
-
- public PDFContentGeneratorHelper clipRect(Rectangle rectangle) {
- generator.clipRect(rectangle);
- return this;
- }
-
- public PDFContentGeneratorHelper saveGraphicsState() {
- return addLine("q");
- }
-
- public PDFContentGeneratorHelper restoreGraphicsState() {
- return addLine("Q");
- }
-
- public PDFContentGeneratorHelper setSolidLine() {
- generator.add("[] 0 d ");
- return this;
- }
-
- public PDFContentGeneratorHelper setRoundCap() {
- return add("J", "1");
- }
-
- public PDFContentGeneratorHelper strokeLine(float xStart, float yStart, float xEnd, float yEnd) {
- add("m", xStart, yStart);
- return addLine("l S", xEnd, yEnd);
- }
-
- public PDFContentGeneratorHelper fillRect(int xStart, int yStart, int xEnd, int yEnd) {
- String xS = format(xStart);
- String xE = format(xEnd);
- String yS = format(yStart);
- String yE = format(yEnd);
- return addLine("m", xS, yS)
- .addLine("l", xE, yS)
- .addLine("l", xE, yE)
- .addLine("l", xS, yE)
- .addLine("h")
- .addLine("f");
- }
-
- public PDFContentGeneratorHelper fillRidge(RuleStyle style, int xStart, int yStart, int xEnd,
- int yEnd, int half) {
- String xS = format(xStart);
- String xE = format(xEnd);
- String yS = format(yStart);
- if (style == RuleStyle.GROOVE) {
- addLine("m", xS, yS)
- .addLine("l", xE, yS)
- .addLine("l", xE, format(yStart + half))
- .addLine("l", format(xStart + half), format(yStart + half))
- .addLine("l", xS, format(yStart + 2 * half));
- } else {
- addLine("m", xE, yS)
- .addLine("l", xE, format(yStart + 2 * half))
- .addLine("l", xS, format(yStart + 2 * half))
- .addLine("l", xS, format(yStart + half))
- .addLine("l", format(xEnd - half), format(yStart + half));
- }
- return addLine("h").addLine("f");
- }
-
- public PDFContentGeneratorHelper setLineWidth(float width) {
- return addLine("w", width);
- }
-
- public PDFContentGeneratorHelper setDashLine(float first, float... rest) {
- StringBuilder sb = new StringBuilder();
- sb.append("[").append(format(first));
- for (float unit : rest) {
- sb.append(" ").append(format(unit));
- }
- sb.append("] 0 d ");
- generator.add(sb.toString());
- return this;
- }
-
- public PDFContentGeneratorHelper setColor(Color col) {
- generator.setColor(col, false);
- return this;
- }
-
- public PDFContentGeneratorHelper setFillColor(Color col) {
- generator.setColor(col, true);
- return this;
- }
-
- public PDFContentGeneratorHelper transformFloatCoordinates(float a, float b, float c, float d,
- float e, float f) {
- return add("cm", a, b, c, d, e, f);
- }
-
- public PDFContentGeneratorHelper transformCoordinates(int a, int b, int c, int d, int e, int f) {
- return add("cm", format(a), format(b), format(c), format(d), format(e), format(f));
- }
-
- public PDFContentGeneratorHelper transformCoordinatesLine(int a, int b, int c, int d, int e, int f) {
- return addLine("cm", format(a), format(b), format(c), format(d), format(e), format(f));
- }
-
- public PDFContentGeneratorHelper add(String op) {
- assert op.equals(op.trim());
- generator.add(op + " ");
- return this;
- }
-
- private PDFContentGeneratorHelper add(String op, String... args) {
- add(createArgs(args), op);
- return this;
- }
-
- public PDFContentGeneratorHelper addLine(String op) {
- assert op.equals(op.trim());
- generator.add(op + "\n");
- return this;
- }
-
- public PDFContentGeneratorHelper addLine(String op, String... args) {
- addLine(createArgs(args), op);
- return this;
- }
-
- private PDFContentGeneratorHelper add(String op, float... args) {
- add(createArgs(args), op);
- return this;
- }
-
- public PDFContentGeneratorHelper addLine(String op, float... args) {
- addLine(createArgs(args), op);
- return this;
- }
-
- private StringBuilder createArgs(float... args) {
- StringBuilder sb = new StringBuilder();
- for (float arg : args) {
- sb.append(format(arg)).append(" ");
- }
- return sb;
- }
-
- private StringBuilder createArgs(String... args) {
- StringBuilder sb = new StringBuilder();
- for (String arg : args) {
- sb.append(arg).append(" ");
- }
- return sb;
- }
-
- private void add(StringBuilder args, String op) {
- assert op.equals(op.trim());
- generator.add(args.append(op).append(" ").toString());
- }
-
- private void addLine(StringBuilder args, String op) {
- assert op.equals(op.trim());
- generator.add(args.append(op).append("\n").toString());
- }
- }
-
- }
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