protected Stroke getStroke(VPFSymbolAttributes attr) {
BasicStroke stroke;
float lineWidth = (float) attr.getOutlineWidth() + .5f; // Exagerate a bit line width
if (attr.getOutlineStippleFactor() > 0) {
// Dashed line - determine dash array from 16 bit stipple pattern
ArrayList<Float> dashList = new ArrayList<Float>();
short pattern = attr.getOutlineStipplePattern();
int length = 0;
boolean dash = true;
for (int i = 0; i < 16; i++) {
boolean dashBit = ((pattern << i) & 0x8000) > 0;
if (dashBit != dash) {
dashList.add((float) length);
length = attr.getOutlineStippleFactor();
dash = dashBit;
} else length += attr.getOutlineStippleFactor();
}
dashList.add((float) length);
float[] dashArray = new float[dashList.size()];
for (int i = 0; i < dashList.size(); i++) {
dashArray[i] = dashList.get(i);
}
stroke =
new BasicStroke(
lineWidth, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND, 10f, dashArray, 0f);
} else {
// Plain line
stroke = new BasicStroke(lineWidth);
}
return stroke;
}
protected void drawPointLegend(
VPFSymbolAttributes attr, Graphics2D g2, int width, int height, int margin) {
if (attr.getIconImageSource() == null) return;
BufferedImage icon = getImage(attr.getIconImageSource());
if (icon != null) {
// icon width / height
int iw = icon.getWidth();
int ih = icon.getHeight();
// draw area width / height
int dw = width - margin * 2;
int dh = height - margin * 2;
// draw scale to fit icon inside draw area
float sx = iw > dw ? (float) dw / iw : 1f; // shrink only
float sy = ih > dh ? (float) dh / ih : 1f;
float scale = Math.min(sx, sy);
iw = (int) ((float) iw * scale);
ih = (int) ((float) ih * scale);
// Center image and draw
int x1 = iw < dw ? margin + (dw - iw) / 2 : margin;
int y1 = ih < dh ? margin + (dh - ih) / 2 : margin;
g2.setRenderingHint(
RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2.drawImage(icon, x1, y1, iw, ih, null);
}
}
@SuppressWarnings({"UnusedDeclaration"})
protected Paint getFillPaint(VPFSymbolAttributes attr, int width, int height) {
if (attr.getImageSource() == null) return attr.getInteriorMaterial().getDiffuse();
// int patternSize = Math.min(width, height); // fit one pattern tiles
BufferedImage pattern = getImage(attr.getImageSource());
if (pattern != null)
return new TexturePaint(
pattern, new Rectangle(0, 0, pattern.getWidth(), pattern.getHeight()));
return attr.getInteriorMaterial().getDiffuse();
}
protected void drawAreaLegend(
VPFSymbolAttributes attr, Graphics2D g2, int width, int height, int margin) {
// Interior if any
if (attr.isDrawInterior()) {
g2.setPaint(this.getFillPaint(attr, width, height));
g2.fillRect(margin, margin, width - margin * 2, height - margin * 2);
}
// Outline if any
if (attr.isDrawOutline()) {
g2.setStroke(this.getStroke(attr));
g2.setPaint(attr.getOutlineMaterial().getDiffuse());
g2.drawRect(margin, margin, width - margin * 2, height - margin * 2);
}
}
public BufferedImage createLegendImage(
VPFSymbolAttributes attr, int width, int height, int margin) {
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_4BYTE_ABGR);
Graphics2D g2 = image.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
switch (attr.getFeatureType()) {
case POINT:
this.drawPointLegend(attr, g2, width, height, margin);
break;
case LINE:
this.drawLineLegend(attr, g2, width, height, margin);
break;
case AREA:
this.drawAreaLegend(attr, g2, width, height, margin);
break;
}
return image;
}
protected void drawLineLegend(
VPFSymbolAttributes attr, Graphics2D g2, int width, int height, int margin) {
g2.setStroke(this.getStroke(attr));
g2.setPaint(attr.getOutlineMaterial().getDiffuse());
g2.drawLine(margin, height / 2, width - margin, height / 2);
}