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added combined transforms

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hneemann 2018-12-03 22:00:44 +01:00
parent 402a38387f
commit bff8d7ea43
1 changed files with 92 additions and 44 deletions
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136
src/main/java/de/neemann/digital/draw/shapes/custom/svg/Context.java
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@ -11,6 +11,9 @@ import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import java.awt.*;
import java.io.IOException;
import java.io.StreamTokenizer;
import java.io.StringReader;
import java.util.HashMap;
import java.util.StringTokenizer;
@ -151,51 +154,96 @@ class Context {
}
private static void readTransform(Context c, String value) throws SvgException {
StringTokenizer st = new StringTokenizer(value, "(),");
Transform t;
final String trans = st.nextToken();
switch (trans) {
case "translate":
final float x = Float.parseFloat(st.nextToken());
float y = 0;
if (st.hasMoreTokens())
y = Float.parseFloat(st.nextToken());
t = new TransformTranslate(new VectorFloat(x, y));
break;
case "scale":
final float xs = Float.parseFloat(st.nextToken());
float ys = xs;
if (st.hasMoreTokens())
ys = Float.parseFloat(st.nextToken());
t = new TransformMatrix(xs, 0, 0, ys, 0, 0);
break;
case "matrix":
final float ma = Float.parseFloat(st.nextToken());
final float mb = Float.parseFloat(st.nextToken());
final float mc = Float.parseFloat(st.nextToken());
t = new TransformMatrix(
ma,
mc,
mb,
Float.parseFloat(st.nextToken()),
Float.parseFloat(st.nextToken()),
Float.parseFloat(st.nextToken()));
break;
case "rotate":
float w = Float.parseFloat(st.nextToken());
if (st.hasMoreTokens()) {
t = TransformMatrix.rotate(w);
float xc = Float.parseFloat(st.nextToken());
float yc = Float.parseFloat(st.nextToken());
t = Transform.mul(new TransformTranslate(-xc, -yc), t);
t = Transform.mul(t, new TransformTranslate(xc, yc));
} else
t = TransformMatrix.rotate(w);
break;
default:
throw new SvgException("unknown transform: " + value, null);
StreamTokenizer tokenzer = new StreamTokenizer(new StringReader(value));
try {
Transform t;
while (true) {
final int tok = tokenzer.nextToken();
if (tok == StreamTokenizer.TT_EOF)
break;
if (tok != StreamTokenizer.TT_WORD)
throw new SvgException("invalid transform", null);
switch (tokenzer.sval) {
case "translate":
consume(tokenzer, '(');
final float x = readFloat(tokenzer);
float y = 0;
if (isComma(tokenzer))
y = readFloat(tokenzer);
consume(tokenzer, ')');
t = new TransformTranslate(new VectorFloat(x, y));
break;
case "scale":
consume(tokenzer, '(');
final float xs = readFloat(tokenzer);
float ys = xs;
if (isComma(tokenzer))
ys = readFloat(tokenzer);
consume(tokenzer, ')');
t = new TransformMatrix(xs, 0, 0, ys, 0, 0);
break;
case "matrix":
consume(tokenzer, '(');
final float ma = readFloat(tokenzer);
consume(tokenzer, ',');
final float mb = readFloat(tokenzer);
consume(tokenzer, ',');
final float mc = readFloat(tokenzer);
consume(tokenzer, ',');
final float md = readFloat(tokenzer);
consume(tokenzer, ',');
final float mx = readFloat(tokenzer);
consume(tokenzer, ',');
final float my = readFloat(tokenzer);
consume(tokenzer, ')');
t = new TransformMatrix(
ma,
mc,
mb,
md,
mx,
my);
break;
case "rotate":
consume(tokenzer, '(');
float w = readFloat(tokenzer);
if (isComma(tokenzer)) {
t = TransformMatrix.rotate(w);
float xc = readFloat(tokenzer);
consume(tokenzer, ',');
float yc = readFloat(tokenzer);
t = Transform.mul(new TransformTranslate(-xc, -yc), t);
t = Transform.mul(t, new TransformTranslate(xc, yc));
} else
t = TransformMatrix.rotate(w);
consume(tokenzer, ')');
break;
default:
throw new SvgException("unknown transform: " + value, null);
}
c.tr = Transform.mul(t, c.tr);
}
} catch (IOException e) {
// can never happen
}
c.tr = Transform.mul(t, c.tr);
}
private static boolean isComma(StreamTokenizer tokenzer) throws IOException {
if (tokenzer.nextToken() == ',')
return true;
tokenzer.pushBack();
return false;
}
private static void consume(StreamTokenizer tokenzer, char c) throws IOException, SvgException {
if (tokenzer.nextToken() != c)
throw new SvgException("expected " + c, null);
}
private static float readFloat(StreamTokenizer tokenzer) throws IOException, SvgException {
if (tokenzer.nextToken() != StreamTokenizer.TT_NUMBER)
throw new SvgException("number expected", null);
return (float) tokenzer.nval;
}
private static Color getColorFromString(String v) {