@Override
public void glyph(
final Graphics2D g,
final Rectangle2D rect,
final CachedDimRangeSymbolizer symbol,
final MapLayer layer) {
int[] ARGB = new int[] {Color.RED.getRGB(), Color.GREEN.getRGB(), Color.BLUE.getRGB()};
if (layer instanceof CoverageMapLayer) {
final CoverageMapLayer cml = (CoverageMapLayer) layer;
final CoverageReference ref = cml.getCoverageReference();
try {
final GridCoverageReader reader = ref.acquireReader();
final GridCoverageReadParam param = new GridCoverageReadParam();
param.setResolution(1, 1);
GridCoverage2D cov = (GridCoverage2D) reader.read(0, param);
ref.recycle(reader);
cov = cov.view(ViewType.NATIVE);
RenderedImage img = cov.getRenderedImage();
ColorModel cm = img.getColorModel();
if (cm instanceof IndexColorModel) {
final IndexColorModel icm = (IndexColorModel) cm;
final GridSampleDimension sampleDim = cov.getSampleDimension(0);
int size = icm.getMapSize();
ARGB = new int[size];
icm.getRGBs(ARGB);
final double minVal = sampleDim.getMinimumValue();
final double maxVal = sampleDim.getMaximumValue();
final ColorMap colorMap = new ColorMap();
colorMap.setGeophysicsRange(
ColorMap.ANY_QUANTITATIVE_CATEGORY,
new MeasurementRange(
NumberRange.create(minVal, true, maxVal, true), sampleDim.getUnits()));
GridSampleDimension ret = colorMap.recolor(sampleDim, ARGB);
}
} catch (CoverageStoreException | CancellationException ex) {
Logging.getLogger("org.geotoolkit.display2d.ext.dimrange").log(Level.WARNING, null, ex);
}
}
final float[] space = new float[ARGB.length];
final Color[] colors = new Color[ARGB.length];
for (int i = 0; i < space.length; i++) {
space[i] = (float) i / (space.length - 1);
colors[i] = new Color(ARGB[i]);
}
final LinearGradientPaint paint =
new LinearGradientPaint(
(float) rect.getMinX(),
(float) rect.getMinY(),
(float) rect.getMaxX(),
(float) rect.getMinY(),
space,
colors);
g.setPaint(paint);
g.fill(rect);
}
@Override
public List<GridSampleDimension> getSampleDimensions(final int i)
throws CoverageStoreException, CancellationException {
return Collections.singletonList(coverage.getSampleDimension(i));
}