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Brings SVG parsing and drawing functionality to Android devices. Forked from the original project at https://github.com/japgolly/svg-android (which was forked from http://code.google.com/p/svg-android/).
The newest version!
package com.larvalabs.svgandroid;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.DashPathEffect;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Picture;
import android.graphics.RadialGradient;
import android.graphics.RectF;
import android.graphics.Shader;
import android.graphics.Shader.TileMode;
import android.util.Log;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.StringTokenizer;
import java.util.regex.Pattern;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
/*
* 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.
*/
/**
* @author Larva Labs, LLC
*/
public class SVGParser {
static final String TAG = "SVGAndroid";
private static boolean DISALLOW_DOCTYPE_DECL = true;
/**
* Parses a single SVG path and returns it as a android.graphics.Path object. An example path is
* M250,150L150,350L350,350Z, which draws a triangle.
*
* @param pathString the SVG path, see the specification here.
*/
public static Path parsePath(String pathString) {
return doPath(pathString);
}
static SVG parse(InputSource data, SVGHandler handler) throws SVGParseException {
try {
final Picture picture = new Picture();
handler.setPicture(picture);
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
XMLReader xr = sp.getXMLReader();
xr.setContentHandler(handler);
xr.setFeature("http://xml.org/sax/features/validation", false);
if (DISALLOW_DOCTYPE_DECL) {
try {
xr.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
} catch (SAXNotRecognizedException e) {
DISALLOW_DOCTYPE_DECL = false;
}
}
xr.parse(data);
SVG result = new SVG(picture, handler.bounds);
// Skip bounds if it was an empty pic
if (!Float.isInfinite(handler.limits.top)) {
result.setLimits(handler.limits);
}
return result;
} catch (Exception e) {
Log.e(TAG, "Failed to parse SVG.", e);
throw new SVGParseException(e);
}
}
private static NumberParse parseNumbers(String s) {
// Util.debug("Parsing numbers from: '" + s + "'");
int n = s.length();
int p = 0;
ArrayList numbers = new ArrayList();
boolean skipChar = false;
boolean prevWasE = false;
for (int i = 1; i < n; i++) {
if (skipChar) {
skipChar = false;
continue;
}
char c = s.charAt(i);
switch (c) {
// This ends the parsing, as we are on the next element
case 'M':
case 'm':
case 'Z':
case 'z':
case 'L':
case 'l':
case 'H':
case 'h':
case 'V':
case 'v':
case 'C':
case 'c':
case 'S':
case 's':
case 'Q':
case 'q':
case 'T':
case 't':
case 'a':
case 'A':
case ')': {
String str = s.substring(p, i);
if (str.trim().length() > 0) {
// Util.debug(" Last: " + str);
Float f = Float.parseFloat(str);
numbers.add(f);
}
p = i;
return new NumberParse(numbers, p);
}
case '-':
// Allow numbers with negative exp such as 7.23e-4
if (prevWasE) {
prevWasE = false;
break;
}
// fall-through
case '\n':
case '\t':
case ' ':
case ',': {
String str = s.substring(p, i);
// Just keep moving if multiple whitespace
if (str.trim().length() > 0) {
// Util.debug(" Next: " + str);
Float f = Float.parseFloat(str);
numbers.add(f);
if (c == '-') {
p = i;
} else {
p = i + 1;
skipChar = true;
}
} else {
p++;
}
prevWasE = false;
break;
}
case 'e':
prevWasE = true;
break;
default:
prevWasE = false;
}
}
String last = s.substring(p);
if (last.length() > 0) {
// Util.debug(" Last: " + last);
try {
numbers.add(Float.parseFloat(last));
} catch (NumberFormatException nfe) {
// Just white-space, forget it
}
p = s.length();
}
return new NumberParse(numbers, p);
}
private static final Pattern TRANSFORM_SEP = Pattern.compile("[\\s,]*");
/**
* Parse a list of transforms such as: foo(n,n,n...) bar(n,n,n..._ ...) Delimiters are whitespaces or commas
*/
private static Matrix parseTransform(String s) {
Matrix matrix = new Matrix();
while (true) {
parseTransformItem(s, matrix);
// Log.i(TAG, "Transformed: (" + s + ") " + matrix);
final int rparen = s.indexOf(")");
if (rparen > 0 && s.length() > rparen + 1) {
s = TRANSFORM_SEP.matcher(s.substring(rparen + 1)).replaceFirst("");
} else {
break;
}
}
return matrix;
}
private static Matrix parseTransformItem(String s, Matrix matrix) {
if (s.startsWith("matrix(")) {
NumberParse np = parseNumbers(s.substring("matrix(".length()));
if (np.numbers.size() == 6) {
Matrix mat = new Matrix();
mat.setValues(new float[] {
// Row 1
np.numbers.get(0), np.numbers.get(2), np.numbers.get(4),
// Row 2
np.numbers.get(1), np.numbers.get(3), np.numbers.get(5),
// Row 3
0, 0, 1, });
matrix.preConcat(mat);
}
} else if (s.startsWith("translate(")) {
NumberParse np = parseNumbers(s.substring("translate(".length()));
if (np.numbers.size() > 0) {
float tx = np.numbers.get(0);
float ty = 0;
if (np.numbers.size() > 1) {
ty = np.numbers.get(1);
}
matrix.preTranslate(tx, ty);
}
} else if (s.startsWith("scale(")) {
NumberParse np = parseNumbers(s.substring("scale(".length()));
if (np.numbers.size() > 0) {
float sx = np.numbers.get(0);
float sy = sx;
if (np.numbers.size() > 1) {
sy = np.numbers.get(1);
}
matrix.preScale(sx, sy);
}
} else if (s.startsWith("skewX(")) {
NumberParse np = parseNumbers(s.substring("skewX(".length()));
if (np.numbers.size() > 0) {
float angle = np.numbers.get(0);
matrix.preSkew((float) Math.tan(angle), 0);
}
} else if (s.startsWith("skewY(")) {
NumberParse np = parseNumbers(s.substring("skewY(".length()));
if (np.numbers.size() > 0) {
float angle = np.numbers.get(0);
matrix.preSkew(0, (float) Math.tan(angle));
}
} else if (s.startsWith("rotate(")) {
NumberParse np = parseNumbers(s.substring("rotate(".length()));
if (np.numbers.size() > 0) {
float angle = np.numbers.get(0);
float cx = 0;
float cy = 0;
if (np.numbers.size() > 2) {
cx = np.numbers.get(1);
cy = np.numbers.get(2);
}
matrix.preTranslate(-cx, -cy);
matrix.preRotate(angle);
matrix.preTranslate(cx, cy);
}
} else {
Log.w(TAG, "Invalid transform (" + s + ")");
}
return matrix;
}
/**
* This is where the hard-to-parse paths are handled. Uppercase rules are absolute positions, lowercase are
* relative. Types of path rules:
*
*
* - M/m - (x y)+ - Move to (without drawing)
*
- Z/z - (no params) - Close path (back to starting point)
*
- L/l - (x y)+ - Line to
*
- H/h - x+ - Horizontal ine to
*
- V/v - y+ - Vertical line to
*
- C/c - (x1 y1 x2 y2 x y)+ - Cubic bezier to
*
- S/s - (x2 y2 x y)+ - Smooth cubic bezier to (shorthand that assumes the x2, y2 from previous C/S is the x1,
* y1 of this bezier)
*
- Q/q - (x1 y1 x y)+ - Quadratic bezier to
*
- T/t - (x y)+ - Smooth quadratic bezier to (assumes previous control point is "reflection" of last one w.r.t.
* to current point)
*
*
* Numbers are separate by whitespace, comma or nothing at all (!) if they are self-delimiting, (ie. begin with a -
* sign)
*
* @param s the path string from the XML
*/
private static Path doPath(String s) {
int n = s.length();
ParserHelper ph = new ParserHelper(s, 0);
ph.skipWhitespace();
Path p = new Path();
float lastX = 0;
float lastY = 0;
float lastX1 = 0;
float lastY1 = 0;
float subPathStartX = 0;
float subPathStartY = 0;
char prevCmd = 0;
while (ph.pos < n) {
char cmd = s.charAt(ph.pos);
switch (cmd) {
case '-':
case '+':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if (prevCmd == 'm' || prevCmd == 'M') {
cmd = (char) ((prevCmd) - 1);
break;
} else if (("lhvcsqta").indexOf(Character.toLowerCase(prevCmd)) >= 0) {
cmd = prevCmd;
break;
}
default: {
ph.advance();
prevCmd = cmd;
}
}
boolean wasCurve = false;
switch (cmd) {
case 'M':
case 'm': {
float x = ph.nextFloat();
float y = ph.nextFloat();
if (cmd == 'm') {
subPathStartX += x;
subPathStartY += y;
p.rMoveTo(x, y);
lastX += x;
lastY += y;
} else {
subPathStartX = x;
subPathStartY = y;
p.moveTo(x, y);
lastX = x;
lastY = y;
}
break;
}
case 'Z':
case 'z': {
p.close();
p.moveTo(subPathStartX, subPathStartY);
lastX = subPathStartX;
lastY = subPathStartY;
lastX1 = subPathStartX;
lastY1 = subPathStartY;
wasCurve = true;
break;
}
case 'T':
case 't':
// todo - smooth quadratic Bezier (two parameters)
case 'L':
case 'l': {
float x = ph.nextFloat();
float y = ph.nextFloat();
if (cmd == 'l') {
p.rLineTo(x, y);
lastX += x;
lastY += y;
} else {
p.lineTo(x, y);
lastX = x;
lastY = y;
}
break;
}
case 'H':
case 'h': {
float x = ph.nextFloat();
if (cmd == 'h') {
p.rLineTo(x, 0);
lastX += x;
} else {
p.lineTo(x, lastY);
lastX = x;
}
break;
}
case 'V':
case 'v': {
float y = ph.nextFloat();
if (cmd == 'v') {
p.rLineTo(0, y);
lastY += y;
} else {
p.lineTo(lastX, y);
lastY = y;
}
break;
}
case 'C':
case 'c': {
wasCurve = true;
float x1 = ph.nextFloat();
float y1 = ph.nextFloat();
float x2 = ph.nextFloat();
float y2 = ph.nextFloat();
float x = ph.nextFloat();
float y = ph.nextFloat();
if (cmd == 'c') {
x1 += lastX;
x2 += lastX;
x += lastX;
y1 += lastY;
y2 += lastY;
y += lastY;
}
p.cubicTo(x1, y1, x2, y2, x, y);
lastX1 = x2;
lastY1 = y2;
lastX = x;
lastY = y;
break;
}
case 'Q':
case 'q':
// todo - quadratic Bezier (four parameters)
case 'S':
case 's': {
wasCurve = true;
float x2 = ph.nextFloat();
float y2 = ph.nextFloat();
float x = ph.nextFloat();
float y = ph.nextFloat();
if (Character.isLowerCase(cmd)) {
x2 += lastX;
x += lastX;
y2 += lastY;
y += lastY;
}
float x1 = 2 * lastX - lastX1;
float y1 = 2 * lastY - lastY1;
p.cubicTo(x1, y1, x2, y2, x, y);
lastX1 = x2;
lastY1 = y2;
lastX = x;
lastY = y;
break;
}
case 'A':
case 'a': {
float rx = ph.nextFloat();
float ry = ph.nextFloat();
float theta = ph.nextFloat();
int largeArc = ph.nextFlag();
int sweepArc = ph.nextFlag();
float x = ph.nextFloat();
float y = ph.nextFloat();
if (cmd == 'a') {
x += lastX;
y += lastY;
}
drawArc(p, lastX, lastY, x, y, rx, ry, theta, largeArc, sweepArc);
lastX = x;
lastY = y;
break;
}
default:
Log.w(TAG, "Invalid path command: " + cmd);
ph.advance();
}
if (!wasCurve) {
lastX1 = lastX;
lastY1 = lastY;
}
ph.skipWhitespace();
}
return p;
}
private static float angle(float x1, float y1, float x2, float y2) {
return (float) Math.toDegrees(Math.atan2(x1, y1) - Math.atan2(x2, y2)) % 360;
}
private static final RectF arcRectf = new RectF();
private static final Matrix arcMatrix = new Matrix();
private static final Matrix arcMatrix2 = new Matrix();
private static void drawArc(Path p, float lastX, float lastY, float x, float y, float rx, float ry, float theta,
int largeArc, int sweepArc) {
// Log.d("drawArc", "from (" + lastX + "," + lastY + ") to (" + x + ","+ y + ") r=(" + rx + "," + ry +
// ") theta=" + theta + " flags="+ largeArc + "," + sweepArc);
// http://www.w3.org/TR/SVG/implnote.html#ArcImplementationNotes
if (rx == 0 || ry == 0) {
p.lineTo(x, y);
return;
}
if (x == lastX && y == lastY) {
return; // nothing to draw
}
rx = Math.abs(rx);
ry = Math.abs(ry);
final float thrad = theta * (float) Math.PI / 180;
final float st = (float) Math.sin(thrad);
final float ct = (float) Math.cos(thrad);
final float xc = (lastX - x) / 2;
final float yc = (lastY - y) / 2;
final float x1t = ct * xc + st * yc;
final float y1t = -st * xc + ct * yc;
final float x1ts = x1t * x1t;
final float y1ts = y1t * y1t;
float rxs = rx * rx;
float rys = ry * ry;
float lambda = (x1ts / rxs + y1ts / rys) * 1.001f; // add 0.1% to be sure that no out of range occurs due to
// limited precision
if (lambda > 1) {
float lambdasr = (float) Math.sqrt(lambda);
rx *= lambdasr;
ry *= lambdasr;
rxs = rx * rx;
rys = ry * ry;
}
final float R = (float) (
Math.sqrt((rxs * rys - rxs * y1ts - rys * x1ts) / (rxs * y1ts + rys * x1ts))
* ((largeArc == sweepArc) ? -1 : 1)
);
final float cxt = R * rx * y1t / ry;
final float cyt = -R * ry * x1t / rx;
final float cx = ct * cxt - st * cyt + (lastX + x) / 2;
final float cy = st * cxt + ct * cyt + (lastY + y) / 2;
final float th1 = angle(1, 0, (x1t - cxt) / rx, (y1t - cyt) / ry);
float dth = angle((x1t - cxt) / rx, (y1t - cyt) / ry, (-x1t - cxt) / rx, (-y1t - cyt) / ry);
if (sweepArc == 0 && dth > 0) {
dth -= 360;
} else if (sweepArc != 0 && dth < 0) {
dth += 360;
}
// draw
if ((theta % 360) == 0) {
// no rotate and translate need
arcRectf.set(cx - rx, cy - ry, cx + rx, cy + ry);
p.arcTo(arcRectf, th1, dth);
} else {
// this is the hard and slow part :-)
arcRectf.set(-rx, -ry, rx, ry);
arcMatrix.reset();
arcMatrix.postRotate(theta);
arcMatrix.postTranslate(cx, cy);
arcMatrix.invert(arcMatrix2);
p.transform(arcMatrix2);
p.arcTo(arcRectf, th1, dth);
p.transform(arcMatrix);
}
}
private static NumberParse getNumberParseAttr(String name, Attributes attributes) {
int n = attributes.getLength();
for (int i = 0; i < n; i++) {
if (attributes.getLocalName(i).equals(name)) {
return parseNumbers(attributes.getValue(i));
}
}
return null;
}
private static String getStringAttr(String name, Attributes attributes) {
int n = attributes.getLength();
for (int i = 0; i < n; i++) {
if (attributes.getLocalName(i).equals(name)) {
return attributes.getValue(i);
}
}
return null;
}
private static Float getFloatAttr(String name, Attributes attributes) {
return getFloatAttr(name, attributes, null);
}
private static Float getFloatAttr(String name, Attributes attributes, Float defaultValue) {
String v = getStringAttr(name, attributes);
return parseFloatValue(v, defaultValue);
}
private static float getFloatAttr(String name, Attributes attributes, float defaultValue) {
String v = getStringAttr(name, attributes);
return parseFloatValue(v, defaultValue);
}
private static Float parseFloatValue(String str, Float defaultValue) {
if (str == null) {
return defaultValue;
} else if (str.endsWith("px")) {
str = str.substring(0, str.length() - 2);
} else if (str.endsWith("%")) {
str = str.substring(0, str.length() - 1);
return Float.parseFloat(str) / 100;
}
// Log.d(TAG, "Float parsing '" + name + "=" + v + "'");
return Float.parseFloat(str);
}
private static class NumberParse {
private ArrayList numbers;
private int nextCmd;
public NumberParse(ArrayList numbers, int nextCmd) {
this.numbers = numbers;
this.nextCmd = nextCmd;
}
public int getNextCmd() {
return nextCmd;
}
public float getNumber(int index) {
return numbers.get(index);
}
}
private static class Gradient {
String id;
String xlink;
boolean isLinear;
float x1, y1, x2, y2;
float x, y, radius;
ArrayList positions = new ArrayList();
ArrayList colors = new ArrayList();
Matrix matrix = null;
public Shader shader = null;
public boolean boundingBox = false;
public TileMode tilemode;
/*
public Gradient createChild(Gradient g) {
Gradient child = new Gradient();
child.id = g.id;
child.xlink = id;
child.isLinear = g.isLinear;
child.x1 = g.x1;
child.x2 = g.x2;
child.y1 = g.y1;
child.y2 = g.y2;
child.x = g.x;
child.y = g.y;
child.radius = g.radius;
child.positions = positions;
child.colors = colors;
child.matrix = matrix;
if (g.matrix != null) {
if (matrix == null) {
child.matrix = g.matrix;
} else {
Matrix m = new Matrix(matrix);
m.preConcat(g.matrix);
child.matrix = m;
}
}
child.boundingBox = g.boundingBox;
child.shader = g.shader;
child.tilemode = g.tilemode;
return child;
}
*/
public void inherit(Gradient parent) {
Gradient child = this;
child.xlink = parent.id;
child.positions = parent.positions;
child.colors = parent.colors;
if (child.matrix == null) {
child.matrix = parent.matrix;
} else if (parent.matrix != null) {
Matrix m = new Matrix(parent.matrix);
m.preConcat(child.matrix);
child.matrix = m;
}
}
}
private static class StyleSet {
HashMap styleMap = new HashMap();
private StyleSet(String string) {
String[] styles = string.split(";");
for (String s : styles) {
String[] style = s.split(":");
if (style.length == 2) {
styleMap.put(style[0], style[1]);
}
}
}
public String getStyle(String name) {
return styleMap.get(name);
}
}
private static class Properties {
StyleSet styles = null;
Attributes atts;
private Properties(Attributes atts) {
this.atts = atts;
String styleAttr = getStringAttr("style", atts);
if (styleAttr != null) {
styles = new StyleSet(styleAttr);
}
}
public String getAttr(String name) {
String v = null;
if (styles != null) {
v = styles.getStyle(name);
}
if (v == null) {
v = getStringAttr(name, atts);
}
return v;
}
public String getString(String name) {
return getAttr(name);
}
private Integer rgb(int r, int g, int b) {
return ((r & 0xff) << 16) | ((g & 0xff) << 8) | (b & 0xff);
}
private int parseNum(String v) throws NumberFormatException {
if (v.endsWith("%")) {
v = v.substring(0, v.length() - 1);
return Math.round(Float.parseFloat(v) / 100 * 255);
}
return Integer.parseInt(v);
}
public Integer getColor(String name) {
String v = name;
if (v == null) {
return null;
} else if (v.startsWith("#")) {
try { // #RRGGBB or #AARRGGBB
return Color.parseColor(v);
} catch (IllegalArgumentException iae) {
return null;
}
} else if (v.startsWith("rgb(") && v.endsWith(")")) {
String values[] = v.substring(4, v.length() - 1).split(",");
try {
return rgb(parseNum(values[0]), parseNum(values[1]), parseNum(values[2]));
} catch (NumberFormatException nfe) {
return null;
} catch (ArrayIndexOutOfBoundsException e) {
return null;
}
} else {
return SVGColors.mapColour(v);
}
}
// convert 0xRGB into 0xRRGGBB
private int hex3Tohex6(int x) {
return (x & 0xF00) << 8 | (x & 0xF00) << 12 | (x & 0xF0) << 4 | (x & 0xF0) << 8 | (x & 0xF) << 4
| (x & 0xF);
}
public float getFloat(String name, float defaultValue) {
String v = getAttr(name);
if (v == null) {
return defaultValue;
} else {
try {
return Float.parseFloat(v);
} catch (NumberFormatException nfe) {
return defaultValue;
}
}
}
public Float getFloat(String name, Float defaultValue) {
String v = getAttr(name);
if (v == null) {
return defaultValue;
} else {
try {
return Float.parseFloat(v);
} catch (NumberFormatException nfe) {
return defaultValue;
}
}
}
public Float getFloat(String name) {
return getFloat(name, null);
}
}
private static class LayerAttributes {
public final float opacity;
public LayerAttributes(float opacity) {
this.opacity = opacity;
}
}
static class SVGHandler extends DefaultHandler {
private Picture picture;
private Canvas canvas;
private Float limitsAdjustmentX, limitsAdjustmentY;
final LinkedList layerAttributeStack = new LinkedList();
Paint strokePaint;
boolean strokeSet = false;
final LinkedList strokePaintStack = new LinkedList();
final LinkedList strokeSetStack = new LinkedList();
Paint fillPaint;
boolean fillSet = false;
final LinkedList fillPaintStack = new LinkedList();
final LinkedList fillSetStack = new LinkedList();
Paint textPaint;
boolean drawCharacters;
// See http://stackoverflow.com/questions/4567636/java-sax-parser-split-calls-to-characters
StringBuilder textBuilder;
Float textX;
Float textY;
int newLineCount;
Float textSize;
Matrix font_matrix;
// Scratch rect (so we aren't constantly making new ones)
final RectF rect = new RectF();
RectF bounds = null;
final RectF limits = new RectF(
Float.POSITIVE_INFINITY, Float.POSITIVE_INFINITY, Float.NEGATIVE_INFINITY, Float.NEGATIVE_INFINITY);
Integer searchColor = null;
Integer replaceColor = null;
Float opacityMultiplier = null;
boolean whiteMode = false;
Integer canvasRestoreCount;
final LinkedList transformStack = new LinkedList();
final LinkedList matrixStack = new LinkedList();
final HashMap gradientMap = new HashMap();
Gradient gradient = null;
public SVGHandler() {
strokePaint = new Paint();
strokePaint.setAntiAlias(true);
strokePaint.setStyle(Paint.Style.STROKE);
fillPaint = new Paint();
fillPaint.setAntiAlias(true);
fillPaint.setStyle(Paint.Style.FILL);
textPaint = new Paint();
textPaint.setAntiAlias(true);
matrixStack.addFirst(new Matrix());
layerAttributeStack.addFirst(new LayerAttributes(1f));
}
void setPicture(Picture picture) {
this.picture = picture;
}
public void setColorSwap(Integer searchColor, Integer replaceColor, boolean overideOpacity) {
this.searchColor = searchColor;
this.replaceColor = replaceColor;
if (replaceColor != null && overideOpacity) {
opacityMultiplier = ((replaceColor >> 24) & 0x000000FF) / 255f;
} else {
opacityMultiplier = null;
}
}
public void setWhiteMode(boolean whiteMode) {
this.whiteMode = whiteMode;
}
@Override
public void startDocument() throws SAXException {
// Set up prior to parsing a doc
}
@Override
public void endDocument() throws SAXException {
// Clean up after parsing a doc
}
private final Matrix gradMatrix = new Matrix();
private boolean doFill(Properties atts, RectF bounding_box) {
if ("none".equals(atts.getString("display"))) {
return false;
}
if (whiteMode) {
fillPaint.setShader(null);
fillPaint.setColor(Color.WHITE);
return true;
}
String fillString = atts.getString("fill");
if (fillString == null && SVG_FILL != null) {
fillString = SVG_FILL;
}
if (fillString != null) {
if (fillString.startsWith("url(#")) {
// It's a gradient fill, look it up in our map
String id = fillString.substring("url(#".length(), fillString.length() - 1);
Gradient g = gradientMap.get(id);
Shader shader = null;
if (g != null) {
shader = g.shader;
}
if (shader != null) {
// Util.debug("Found shader!");
fillPaint.setShader(shader);
gradMatrix.set(g.matrix);
if (g.boundingBox && bounding_box != null) {
// Log.d("svg", "gradient is bounding box");
gradMatrix.preTranslate(bounding_box.left, bounding_box.top);
gradMatrix.preScale(bounding_box.width(), bounding_box.height());
}
shader.setLocalMatrix(gradMatrix);
return true;
} else {
Log.w(TAG, "Didn't find shader, using black: " + id);
fillPaint.setShader(null);
doColor(atts, Color.BLACK, true, fillPaint);
return true;
}
} else if (fillString.equalsIgnoreCase("none")) {
fillPaint.setShader(null);
fillPaint.setColor(Color.TRANSPARENT);
return true;
} else {
fillPaint.setShader(null);
Integer color = atts.getColor(fillString);
if (color != null) {
doColor(atts, color, true, fillPaint);
return true;
} else {
Log.w(TAG, "Unrecognized fill color, using black: " + fillString);
doColor(atts, Color.BLACK, true, fillPaint);
return true;
}
}
} else {
if (fillSet) {
// If fill is set, inherit from parent
return fillPaint.getColor() != Color.TRANSPARENT; // optimization
} else {
// Default is black fill
fillPaint.setShader(null);
fillPaint.setColor(Color.BLACK);
return true;
}
}
}
private boolean doStroke(Properties atts) {
if (whiteMode) {
// Never stroke in white mode
return false;
}
if ("none".equals(atts.getString("display"))) {
return false;
}
// Check for other stroke attributes
Float width = atts.getFloat("stroke-width");
if (width != null) {
strokePaint.setStrokeWidth(width);
}
String linecap = atts.getString("stroke-linecap");
if ("round".equals(linecap)) {
strokePaint.setStrokeCap(Paint.Cap.ROUND);
} else if ("square".equals(linecap)) {
strokePaint.setStrokeCap(Paint.Cap.SQUARE);
} else if ("butt".equals(linecap)) {
strokePaint.setStrokeCap(Paint.Cap.BUTT);
}
String linejoin = atts.getString("stroke-linejoin");
if ("miter".equals(linejoin)) {
strokePaint.setStrokeJoin(Paint.Join.MITER);
} else if ("round".equals(linejoin)) {
strokePaint.setStrokeJoin(Paint.Join.ROUND);
} else if ("bevel".equals(linejoin)) {
strokePaint.setStrokeJoin(Paint.Join.BEVEL);
}
pathStyleHelper(atts.getString("stroke-dasharray"), atts.getString("stroke-dashoffset"));
String strokeString = atts.getAttr("stroke");
if (strokeString != null) {
if (strokeString.equalsIgnoreCase("none")) {
strokePaint.setColor(Color.TRANSPARENT);
return false;
} else {
Integer color = atts.getColor(strokeString);
if (color != null) {
doColor(atts, color, false, strokePaint);
return true;
} else {
Log.w(TAG, "Unrecognized stroke color, using none: " + strokeString);
strokePaint.setColor(Color.TRANSPARENT);
return false;
}
}
} else {
if (strokeSet) {
// Inherit from parent
return strokePaint.getColor() != Color.TRANSPARENT; // optimization
} else {
// Default is none
strokePaint.setColor(Color.TRANSPARENT);
return false;
}
}
}
private Gradient doGradient(boolean isLinear, Attributes atts) {
Gradient gradient = new Gradient();
gradient.id = getStringAttr("id", atts);
gradient.isLinear = isLinear;
if (isLinear) {
gradient.x1 = getFloatAttr("x1", atts, 0f);
gradient.x2 = getFloatAttr("x2", atts, 1f);
gradient.y1 = getFloatAttr("y1", atts, 0f);
gradient.y2 = getFloatAttr("y2", atts, 0f);
} else {
gradient.x = getFloatAttr("cx", atts, 0f);
gradient.y = getFloatAttr("cy", atts, 0f);
gradient.radius = getFloatAttr("r", atts, 0f);
}
String transform = getStringAttr("gradientTransform", atts);
if (transform != null) {
gradient.matrix = parseTransform(transform);
}
String spreadMethod = getStringAttr("spreadMethod", atts);
if (spreadMethod == null) {
spreadMethod = "pad";
}
gradient.tilemode =
(spreadMethod.equals("reflect")) ? Shader.TileMode.MIRROR
: (spreadMethod.equals("repeat")) ? Shader.TileMode.REPEAT : Shader.TileMode.CLAMP;
String unit = getStringAttr("gradientUnits", atts);
if (unit == null) {
unit = "objectBoundingBox";
}
gradient.boundingBox = !unit.equals("userSpaceOnUse");
String xlink = getStringAttr("href", atts);
if (xlink != null) {
if (xlink.startsWith("#")) {
xlink = xlink.substring(1);
}
gradient.xlink = xlink;
}
return gradient;
}
private void finishGradients() {
for(Gradient gradient : gradientMap.values()) {
if (gradient.xlink != null) {
Gradient parent = gradientMap.get(gradient.xlink);
if (parent != null) {
gradient.inherit(parent);
}
}
int[] colors = new int[gradient.colors.size()];
for (int i = 0; i < colors.length; i++) {
colors[i] = gradient.colors.get(i);
}
float[] positions = new float[gradient.positions.size()];
for (int i = 0; i < positions.length; i++) {
positions[i] = gradient.positions.get(i);
}
if (colors.length == 0) {
Log.d("BAD", "BAD gradient, id="+gradient.id);
}
if (gradient.isLinear) {
gradient.shader= new LinearGradient(gradient.x1, gradient.y1, gradient.x2, gradient.y2, colors, positions, gradient.tilemode);
} else {
gradient.shader= new RadialGradient(gradient.x, gradient.y, gradient.radius, colors, positions, gradient.tilemode);
}
}
}
private void doColor(Properties atts, Integer color, boolean fillMode, Paint paint) {
int c = (0xFFFFFF & color) | 0xFF000000;
if (searchColor != null && searchColor == c) {
c = replaceColor;
}
paint.setShader(null);
paint.setColor(c);
Float opacityAttr = atts.getFloat("opacity");
if (opacityAttr == null) {
opacityAttr = atts.getFloat(fillMode ? "fill-opacity" : "stroke-opacity");
}
float opacity = opacityAttr != null ? opacityAttr : 1f;
opacity *= currentLayerAttributes().opacity;
if (opacityMultiplier != null) {
opacity *= opacityMultiplier;
}
paint.setAlpha((int) (255f * opacity));
}
/**
* set the path style (if any) stroke-dasharray="n1,n2,..." stroke-dashoffset=n
*/
private void pathStyleHelper(String style, String offset) {
if (style == null) {
return;
}
if (style.equals("none")) {
strokePaint.setPathEffect(null);
return;
}
StringTokenizer st = new StringTokenizer(style, " ,");
int count = st.countTokens();
float[] intervals = new float[(count & 1) == 1 ? count * 2 : count];
float max = 0;
float current = 1f;
int i = 0;
while (st.hasMoreTokens()) {
intervals[i++] = current = toFloat(st.nextToken(), current);
max += current;
}
// in svg speak, we double the intervals on an odd count
for (int start = 0; i < intervals.length; i++, start++) {
max += intervals[i] = intervals[start];
}
float off = 0f;
if (offset != null) {
try {
off = Float.parseFloat(offset) % max;
} catch (NumberFormatException e) {
// ignore
}
}
strokePaint.setPathEffect(new DashPathEffect(intervals, off));
}
private static float toFloat(String s, float dflt) {
float result = dflt;
try {
result = Float.parseFloat(s);
} catch (NumberFormatException e) {
// ignore
}
return result;
}
private boolean hidden = false;
private int hiddenLevel = 0;
private boolean boundsMode = false;
private void doLimits2(float x, float y) {
if (x < limits.left) {
limits.left = x;
}
if (x > limits.right) {
limits.right = x;
}
if (y < limits.top) {
limits.top = y;
}
if (y > limits.bottom) {
limits.bottom = y;
}
}
private final RectF tmpLimitRect = new RectF();
private void doLimits(RectF box, Paint paint) {
Matrix m = matrixStack.getLast();
m.mapRect(tmpLimitRect, box);
float width2 = (paint == null) ? 0 : paint.getStrokeWidth() / 2;
doLimits2(tmpLimitRect.left - width2, tmpLimitRect.top - width2);
doLimits2(tmpLimitRect.right + width2, tmpLimitRect.bottom + width2);
}
private void doLimits(RectF box) {
doLimits(box, null);
}
private void pushTransform(Attributes atts) {
final String transform = getStringAttr("transform", atts);
boolean pushed = transform != null;
transformStack.addLast(pushed);
if (pushed) {
final Matrix matrix = parseTransform(transform);
canvas.save();
canvas.concat(matrix);
matrix.postConcat(matrixStack.getLast());
matrixStack.addLast(matrix);
}
}
private void popTransform() {
if (transformStack.removeLast()) {
canvas.restore();
matrixStack.removeLast();
}
}
private String SVG_FILL = null;
@Override
public void startElement(String namespaceURI, String localName, String qName, Attributes atts)
throws SAXException {
// Reset paint opacity
strokePaint.setAlpha(255);
fillPaint.setAlpha(255);
textPaint.setAlpha(255);
this.drawCharacters = false;
// Ignore everything but rectangles in bounds mode
if (boundsMode) {
if (localName.equals("rect")) {
Float x = getFloatAttr("x", atts);
if (x == null) {
x = 0f;
}
Float y = getFloatAttr("y", atts);
if (y == null) {
y = 0f;
}
Float width = getFloatAttr("width", atts);
Float height = getFloatAttr("height", atts);
bounds = new RectF(x, y, x + width, y + height);
}
return;
}
if (localName.equals("svg")) {
canvas = null;
SVG_FILL = getStringAttr("fill", atts);
String viewboxStr = getStringAttr("viewBox", atts);
if (viewboxStr != null) {
String[] dims = viewboxStr.replace(',', ' ').split("\\s+");
if (dims.length == 4) {
Float x1 = parseFloatValue(dims[0], null);
Float y1 = parseFloatValue(dims[1], null);
Float x2 = parseFloatValue(dims[2], null);
Float y2 = parseFloatValue(dims[3], null);
if (x1 != null && x2 != null && y1 != null && y2 != null) {
x2 += x1;
y2 += y1;
float width = (float) Math.ceil(x2 - x1);
float height = (float) Math.ceil(y2 - y1);
canvas = picture.beginRecording((int) width, (int) height);
canvasRestoreCount = canvas.save();
canvas.clipRect(0f, 0f, width, height);
limitsAdjustmentX = -x1;
limitsAdjustmentY = -y1;
canvas.translate(limitsAdjustmentX, limitsAdjustmentY);
}
}
}
// No viewbox
if (canvas == null) {
int width = (int) Math.ceil(getFloatAttr("width", atts));
int height = (int) Math.ceil(getFloatAttr("height", atts));
canvas = picture.beginRecording(width, height);
canvasRestoreCount = null;
}
} else if (localName.equals("defs")) {
// Ignore
} else if (localName.equals("linearGradient")) {
gradient = doGradient(true, atts);
} else if (localName.equals("radialGradient")) {
gradient = doGradient(false, atts);
} else if (localName.equals("stop")) {
if (gradient != null) {
final Properties props = new Properties(atts);
final int colour;
final Integer stopColour = props.getColor(props.getAttr("stop-color"));
if (stopColour == null) {
colour = 0;
} else {
Float alpha = props.getFloat("stop-opacity");
if (alpha != null) {
int alphaInt = Math.round(255 * alpha * currentLayerAttributes().opacity);
// wipe the auto FF opacity from stopColour before applying stop-opacity:
colour = (stopColour & 0xFFFFFF) | (alphaInt << 24);
} else {
colour = stopColour;
}
}
gradient.colors.add(colour);
float offset = props.getFloat("offset", 0);
gradient.positions.add(offset);
}
} else if (localName.equals("g")) {
final Properties props = new Properties(atts);
// Check to see if this is the "bounds" layer
if ("bounds".equalsIgnoreCase(getStringAttr("id", atts))) {
boundsMode = true;
}
if (hidden) {
hiddenLevel++;
// Util.debug("Hidden up: " + hiddenLevel);
}
// Go in to hidden mode if display is "none"
if ("none".equals(getStringAttr("display", atts)) || "none".equals(props.getString("display"))) {
if (!hidden) {
hidden = true;
hiddenLevel = 1;
// Util.debug("Hidden up: " + hiddenLevel);
}
}
// Create layer attributes
final float opacity = props.getFloat("opacity", 1f);
LayerAttributes curLayerAttr = currentLayerAttributes();
LayerAttributes newLayerAttr = new LayerAttributes(curLayerAttr.opacity * opacity);
layerAttributeStack.addLast(newLayerAttr);
pushTransform(atts);
fillPaintStack.addLast(new Paint(fillPaint));
strokePaintStack.addLast(new Paint(strokePaint));
fillSetStack.addLast(fillSet);
strokeSetStack.addLast(strokeSet);
fillSet |= doFill(props, null); // Added by mrn but a boundingBox is now required by josef.
strokeSet |= doStroke(props);
} else if (!hidden && localName.equals("rect")) {
Float x = getFloatAttr("x", atts);
if (x == null) {
x = 0f;
}
Float y = getFloatAttr("y", atts);
if (y == null) {
y = 0f;
}
Float width = getFloatAttr("width", atts);
Float height = getFloatAttr("height", atts);
Float rx = getFloatAttr("rx", atts, 0f);
Float ry = getFloatAttr("ry", atts, 0f);
pushTransform(atts);
Properties props = new Properties(atts);
rect.set(x, y, x + width, y + height);
if (doFill(props, rect)) {
rect.set(x, y, x + width, y + height);
if (rx <= 0f && ry <= 0f) {
canvas.drawRect(rect, fillPaint);
} else {
canvas.drawRoundRect(rect, rx, ry, fillPaint);
}
doLimits(rect);
}
if (doStroke(props)) {
rect.set(x, y, x + width, y + height);
if (rx <= 0f && ry <= 0f) {
canvas.drawRect(rect, strokePaint);
} else {
canvas.drawRoundRect(rect, rx, ry, strokePaint);
}
doLimits(rect, strokePaint);
}
popTransform();
} else if (!hidden && localName.equals("line")) {
Float x1 = getFloatAttr("x1", atts);
Float x2 = getFloatAttr("x2", atts);
Float y1 = getFloatAttr("y1", atts);
Float y2 = getFloatAttr("y2", atts);
Properties props = new Properties(atts);
if (doStroke(props)) {
pushTransform(atts);
rect.set(x1, y1, x2, y2);
canvas.drawLine(x1, y1, x2, y2, strokePaint);
doLimits(rect, strokePaint);
popTransform();
}
} else if (!hidden && localName.equals("text")) {
Float textX = getFloatAttr("x", atts);
Float textY = getFloatAttr("y", atts);
Float fontSize = getFloatAttr("font-size", atts);
Matrix font_matrix = parseTransform(getStringAttr("transform",
atts));
drawCharacters = true;
if (fontSize != null) {
textSize = fontSize;
pushTransform(atts);
if (textX != null && textY != null) {
this.textX = textX;
this.textY = textY;
} else if (font_matrix != null) {
this.font_matrix = font_matrix;
}
Properties props = new Properties(atts);
Integer color = props.getColor("fill");
if (color != null) {
doColor(props, color, true, textPaint);
} else {
textPaint.setColor(Color.BLACK);
}
this.newLineCount = 0;
textPaint.setTextSize(textSize);
popTransform();
canvas.save();
textBuilder = new StringBuilder();
}
} else if (!hidden && (localName.equals("circle") || localName.equals("ellipse"))) {
Float centerX, centerY, radiusX, radiusY;
centerX = getFloatAttr("cx", atts);
centerY = getFloatAttr("cy", atts);
if (localName.equals("ellipse")) {
radiusX = getFloatAttr("rx", atts);
radiusY = getFloatAttr("ry", atts);
} else {
radiusX = radiusY = getFloatAttr("r", atts);
}
if (centerX != null && centerY != null && radiusX != null && radiusY != null) {
pushTransform(atts);
Properties props = new Properties(atts);
rect.set(centerX - radiusX, centerY - radiusY, centerX + radiusX, centerY + radiusY);
if (doFill(props, rect)) {
canvas.drawOval(rect, fillPaint);
doLimits(rect);
}
if (doStroke(props)) {
canvas.drawOval(rect, strokePaint);
doLimits(rect, strokePaint);
}
popTransform();
}
} else if (!hidden && (localName.equals("polygon") || localName.equals("polyline"))) {
NumberParse numbers = getNumberParseAttr("points", atts);
if (numbers != null) {
Path p = new Path();
ArrayList points = numbers.numbers;
if (points.size() > 1) {
pushTransform(atts);
Properties props = new Properties(atts);
p.moveTo(points.get(0), points.get(1));
for (int i = 2; i < points.size(); i += 2) {
float x = points.get(i);
float y = points.get(i + 1);
p.lineTo(x, y);
}
// Don't close a polyline
if (localName.equals("polygon")) {
p.close();
}
p.computeBounds(rect, false);
if (doFill(props, rect)) {
canvas.drawPath(p, fillPaint);
doLimits(rect);
}
if (doStroke(props)) {
canvas.drawPath(p, strokePaint);
doLimits(rect, strokePaint);
}
popTransform();
}
}
} else if (!hidden && localName.equals("path")) {
Path p = doPath(getStringAttr("d", atts));
pushTransform(atts);
Properties props = new Properties(atts);
p.computeBounds(rect, false);
if (doFill(props, rect)) {
canvas.drawPath(p, fillPaint);
doLimits(rect);
}
if (doStroke(props)) {
canvas.drawPath(p, strokePaint);
doLimits(rect, strokePaint);
}
popTransform();
} else if (!hidden) {
Log.w(TAG, "UNRECOGNIZED SVG COMMAND: " + localName);
}
}
public LayerAttributes currentLayerAttributes() {
return layerAttributeStack.getLast();
}
@Override
public void characters(char ch[], int start, int length) {
if (this.drawCharacters) {
String text = new String(ch, start, length);
textBuilder.append(text);
return;
}
}
@Override
public void endElement(String namespaceURI, String localName, String qName) throws SAXException {
if (localName.equals("svg")) {
if (canvasRestoreCount != null) {
canvas.restoreToCount(canvasRestoreCount);
}
if (limitsAdjustmentX != null) {
limits.left += limitsAdjustmentX;
limits.right += limitsAdjustmentX;
}
if (limitsAdjustmentY != null) {
limits.top += limitsAdjustmentY;
limits.bottom += limitsAdjustmentY;
}
picture.endRecording();
} else if (localName.equals("linearGradient") || localName.equals("radialGradient")) {
if (gradient.id != null) {
gradientMap.put(gradient.id, gradient);
}
} else if (localName.equals("defs")) {
finishGradients();
} else if (localName.equals("g")) {
if (boundsMode) {
boundsMode = false;
}
// Break out of hidden mode
if (hidden) {
hiddenLevel--;
// Util.debug("Hidden down: " + hiddenLevel);
if (hiddenLevel == 0) {
hidden = false;
}
}
// // Clear gradient map
// gradientRefMap.clear();
popTransform();
fillPaint = fillPaintStack.removeLast();
fillSet = fillSetStack.removeLast();
strokePaint = strokePaintStack.removeLast();
strokeSet = strokeSetStack.removeLast();
if (!layerAttributeStack.isEmpty()) {
layerAttributeStack.removeLast();
}
} else if (localName.equals("text")) {
if (this.drawCharacters) {
String text = getFullText();
if (text.length() == 1 && text.equals("\n")) {
newLineCount += 1;
canvas.translate(0, newLineCount * textSize);
} else {
if (this.textX != null && this.textY != null) {
canvas.drawText(text, this.textX, this.textY, textPaint);
} else {
canvas.concat(font_matrix);
canvas.drawText(text, 0, 0, textPaint);
}
}
canvas.restore();
textBuilder = null;
this.drawCharacters = false;
}
}
}
/**
* Return full text value for 'text' element.
* You can override this method if you want replace text before drawing.
* See here for details.
*/
protected String getFullText() {
if (textBuilder == null) {
throw new IllegalStateException("Must be called only if current element is 'text' and when the value is fully parsed!");
}
return textBuilder.toString();
}
}
}