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| 1 | +package org.geoserver.pngwind; |
| 2 | + |
| 3 | +import static org.junit.Assert.assertArrayEquals; |
| 4 | +import static org.junit.Assert.assertEquals; |
| 5 | +import static org.junit.Assert.assertNotNull; |
| 6 | +import static org.junit.Assert.assertTrue; |
| 7 | + |
| 8 | +import java.awt.image.BufferedImage; |
| 9 | +import java.awt.image.Raster; |
| 10 | +import java.io.ByteArrayInputStream; |
| 11 | +import java.io.DataInputStream; |
| 12 | +import java.io.IOException; |
| 13 | +import java.nio.charset.StandardCharsets; |
| 14 | +import java.util.HashMap; |
| 15 | +import java.util.LinkedHashMap; |
| 16 | +import java.util.List; |
| 17 | +import java.util.Map; |
| 18 | +import javax.imageio.ImageIO; |
| 19 | +import javax.imageio.ImageReader; |
| 20 | +import javax.imageio.stream.ImageInputStream; |
| 21 | +import javax.xml.namespace.QName; |
| 22 | +import org.geoserver.catalog.Catalog; |
| 23 | +import org.geoserver.catalog.CoverageDimensionInfo; |
| 24 | +import org.geoserver.catalog.CoverageInfo; |
| 25 | +import org.geoserver.data.test.MockData; |
| 26 | +import org.geoserver.data.test.SystemTestData; |
| 27 | +import org.geoserver.pngwind.config.PngWindConfigurator; |
| 28 | +import org.geoserver.wms.WMSTestSupport; |
| 29 | +import org.geotools.util.NumberRange; |
| 30 | +import org.junit.Test; |
| 31 | +import org.springframework.mock.web.MockHttpServletResponse; |
| 32 | + |
| 33 | +public class PngWindWmsIntegrationTest extends WMSTestSupport { |
| 34 | + |
| 35 | + private static final String UV_LAYER = "winduv"; |
| 36 | + private static final String SD_LAYER = "windspeeddir"; |
| 37 | + private static final QName WIND_UV = new QName(MockData.SF_URI, UV_LAYER, MockData.SF_PREFIX); |
| 38 | + private static final QName WIND_SPEEDDIR = new QName(MockData.SF_URI, SD_LAYER, MockData.SF_PREFIX); |
| 39 | + |
| 40 | + private static final String OUTPUT_FORMAT = "image/vnd.png-wind"; |
| 41 | + private static final double DELTA = 1E-6; |
| 42 | + |
| 43 | + @Override |
| 44 | + protected void onSetUp(SystemTestData testData) throws Exception { |
| 45 | + super.onSetUp(testData); |
| 46 | + testData.addRasterLayer(WIND_UV, "test-data/wind-uv.tif", "tif", new HashMap<>(), getClass(), getCatalog()); |
| 47 | + testData.addRasterLayer( |
| 48 | + WIND_SPEEDDIR, "test-data/wind-speeddir.tif", "tif", new HashMap<>(), getClass(), getCatalog()); |
| 49 | + configureCoverageDimensions( |
| 50 | + UV_LAYER, |
| 51 | + new String[] {"u", "v"}, |
| 52 | + new String[] {"m/s", "m/s"}, |
| 53 | + new Double[] {-20d, -20d}, |
| 54 | + new Double[] {20d, 20d}, |
| 55 | + new Double[] {-999d, -999d}); |
| 56 | + |
| 57 | + configureCoverageDimensions( |
| 58 | + SD_LAYER, |
| 59 | + new String[] {"speed", "direction"}, |
| 60 | + new String[] {"m/s", "deg"}, |
| 61 | + new Double[] {-20d, 0d}, |
| 62 | + new Double[] {20d, 350d}, |
| 63 | + new Double[] {Double.NaN, Double.NaN}); |
| 64 | + PngWindConfigurator configurator = applicationContext.getBean(PngWindConfigurator.class); |
| 65 | + configurator.onReload(); |
| 66 | + } |
| 67 | + |
| 68 | + private void configureCoverageDimensions( |
| 69 | + String layerName, |
| 70 | + String[] dimensionNames, |
| 71 | + String[] dimensionUnits, |
| 72 | + Double[] mins, |
| 73 | + Double[] maxs, |
| 74 | + Double[] nodataValues) |
| 75 | + throws IOException { |
| 76 | + Catalog catalog = getCatalog(); |
| 77 | + |
| 78 | + CoverageInfo coverage = catalog.getCoverageByName(MockData.SF_PREFIX, layerName); |
| 79 | + assertNotNull("Coverage not found in catalog: " + MockData.SF_PREFIX + ":" + layerName, coverage); |
| 80 | + |
| 81 | + List<CoverageDimensionInfo> dimensions = coverage.getDimensions(); |
| 82 | + assertEquals("Unexpected number of dimensions", dimensionNames.length, dimensions.size()); |
| 83 | + |
| 84 | + for (int i = 0; i < dimensions.size(); i++) { |
| 85 | + CoverageDimensionInfo dim = dimensions.get(i); |
| 86 | + dim.setName(dimensionNames[i]); |
| 87 | + dim.setDescription(dimensionNames[i]); |
| 88 | + |
| 89 | + if (dimensionUnits != null && i < dimensionUnits.length) { |
| 90 | + dim.setUnit(dimensionUnits[i]); |
| 91 | + } |
| 92 | + if (mins != null && i < mins.length && mins[i] != null) { |
| 93 | + dim.setRange(new NumberRange<>(Double.class, mins[i], maxs[i])); |
| 94 | + } else if (maxs != null && i < maxs.length && maxs[i] != null) { |
| 95 | + dim.setRange(new NumberRange<>(Double.class, mins[i], maxs[i])); |
| 96 | + } |
| 97 | + if (nodataValues != null && i < nodataValues.length && nodataValues[i] != null) { |
| 98 | + dim.getNullValues().clear(); |
| 99 | + dim.getNullValues().add(nodataValues[i]); |
| 100 | + } |
| 101 | + } |
| 102 | + |
| 103 | + catalog.save(coverage); |
| 104 | + } |
| 105 | + |
| 106 | + @Test |
| 107 | + public void testGetMapPngWindFromUvCoverage() throws Exception { |
| 108 | + MockHttpServletResponse response = getAsServletResponse("wms?service=WMS&version=1.1.1" |
| 109 | + + "&request=GetMap" |
| 110 | + + "&layers=" + MockData.SF_PREFIX + ":" + UV_LAYER |
| 111 | + + "&styles=" |
| 112 | + + "&srs=EPSG:4326" |
| 113 | + + "&bbox=0,0,20,20" |
| 114 | + + "&width=10" |
| 115 | + + "&height=10" |
| 116 | + + "&format=" + PngWindConstants.MIME_TYPE); |
| 117 | + |
| 118 | + assertEquals(200, response.getStatus()); |
| 119 | + assertEquals(OUTPUT_FORMAT, response.getContentType()); |
| 120 | + |
| 121 | + byte[] png = response.getContentAsByteArray(); |
| 122 | + assertTrue(png.length > 0); |
| 123 | + |
| 124 | + Map<String, String> textChunks = readPngTextChunks(png); |
| 125 | + assertEquals(PngWindConstants.FORMAT, textChunks.get("format")); |
| 126 | + assertEquals("u", textChunks.get("wind_b1_name")); |
| 127 | + assertEquals("v", textChunks.get("wind_b2_name")); |
| 128 | + assertEquals(-20d, Double.parseDouble(textChunks.get("wind_b1_offset")), DELTA); |
| 129 | + assertEquals(0.156862d, Double.parseDouble(textChunks.get("wind_b1_scale")), DELTA); |
| 130 | + assertEquals(-20d, Double.parseDouble(textChunks.get("wind_b2_offset")), DELTA); |
| 131 | + assertEquals(0.156862d, Double.parseDouble(textChunks.get("wind_b2_scale")), DELTA); |
| 132 | + assertEquals("m/s", textChunks.get("wind_b1_uom")); |
| 133 | + assertEquals("m/s", textChunks.get("wind_b2_uom")); |
| 134 | + assertEquals("EPSG:4326", textChunks.get("CRS")); |
| 135 | + assertEquals("0.000000,0.000000,20.000000,20.000000", textChunks.get("bbox")); |
| 136 | + } |
| 137 | + |
| 138 | + @Test |
| 139 | + public void testGetMapPngWindFromSpeedDirectionCoverage() throws Exception { |
| 140 | + MockHttpServletResponse response = getAsServletResponse("wms?service=WMS&version=1.1.1" |
| 141 | + + "&request=GetMap" |
| 142 | + + "&layers=" + MockData.SF_PREFIX + ":" + SD_LAYER |
| 143 | + + "&styles=" |
| 144 | + + "&srs=EPSG:4326" |
| 145 | + + "&bbox=0,0,20,20" |
| 146 | + + "&width=20" |
| 147 | + + "&height=20" |
| 148 | + + "&format=" + OUTPUT_FORMAT); |
| 149 | + |
| 150 | + assertEquals(200, response.getStatus()); |
| 151 | + assertEquals(OUTPUT_FORMAT, response.getContentType()); |
| 152 | + |
| 153 | + byte[] png = response.getContentAsByteArray(); |
| 154 | + assertTrue(png.length > 0); |
| 155 | + try (ImageInputStream in = ImageIO.createImageInputStream(new ByteArrayInputStream(png))) { |
| 156 | + ImageReader reader = ImageIO.getImageReadersByFormatName("png").next(); |
| 157 | + reader.setInput(in); |
| 158 | + assertEquals(20, reader.getWidth(0)); |
| 159 | + assertEquals(20, reader.getHeight(0)); |
| 160 | + BufferedImage image = reader.read(0); |
| 161 | + Raster data = image.getData(); |
| 162 | + for (int y = 0; y < data.getHeight(); y++) { |
| 163 | + // The pixel values on the edges should be nodata, therefore 0 as the 3rd band |
| 164 | + assertEquals(0, data.getSample(0, y, 2)); |
| 165 | + assertEquals(0, data.getSample(19, y, 2)); |
| 166 | + } |
| 167 | + } |
| 168 | + |
| 169 | + Map<String, String> textChunks = readPngTextChunks(png); |
| 170 | + assertEquals(PngWindConstants.FORMAT, textChunks.get("format")); |
| 171 | + assertEquals("U", textChunks.get("wind_b1_name")); |
| 172 | + assertEquals("V", textChunks.get("wind_b2_name")); |
| 173 | + assertEquals(-20d, Double.parseDouble(textChunks.get("wind_b1_offset")), DELTA); |
| 174 | + assertEquals(0.156862d, Double.parseDouble(textChunks.get("wind_b1_scale")), DELTA); |
| 175 | + assertEquals(-20d, Double.parseDouble(textChunks.get("wind_b2_offset")), DELTA); |
| 176 | + assertEquals(0.156862d, Double.parseDouble(textChunks.get("wind_b2_scale")), DELTA); |
| 177 | + assertEquals("m/s", textChunks.get("wind_b1_uom")); |
| 178 | + assertEquals("m/s", textChunks.get("wind_b2_uom")); |
| 179 | + assertEquals("EPSG:4326", textChunks.get("CRS")); |
| 180 | + assertEquals("0.000000,0.000000,20.000000,20.000000", textChunks.get("bbox")); |
| 181 | + } |
| 182 | + |
| 183 | + /** Reads PNG tEXt chunks without depending on PNG metadata DOM parsing. */ |
| 184 | + private static Map<String, String> readPngTextChunks(byte[] png) throws IOException { |
| 185 | + Map<String, String> result = new LinkedHashMap<>(); |
| 186 | + |
| 187 | + try (DataInputStream in = new DataInputStream(new ByteArrayInputStream(png))) { |
| 188 | + byte[] signature = new byte[8]; |
| 189 | + in.readFully(signature); |
| 190 | + assertArrayEquals(new byte[] {(byte) 137, 80, 78, 71, 13, 10, 26, 10}, signature); |
| 191 | + |
| 192 | + while (true) { |
| 193 | + int length = in.readInt(); |
| 194 | + byte[] typeBytes = new byte[4]; |
| 195 | + in.readFully(typeBytes); |
| 196 | + String type = new String(typeBytes, StandardCharsets.ISO_8859_1); |
| 197 | + |
| 198 | + byte[] data = new byte[length]; |
| 199 | + in.readFully(data); |
| 200 | + in.readInt(); // CRC |
| 201 | + |
| 202 | + if ("tEXt".equals(type)) { |
| 203 | + int sep = -1; |
| 204 | + for (int i = 0; i < data.length; i++) { |
| 205 | + if (data[i] == 0) { |
| 206 | + sep = i; |
| 207 | + break; |
| 208 | + } |
| 209 | + } |
| 210 | + if (sep > 0) { |
| 211 | + String key = new String(data, 0, sep, StandardCharsets.ISO_8859_1); |
| 212 | + String value = new String(data, sep + 1, data.length - sep - 1, StandardCharsets.ISO_8859_1); |
| 213 | + result.put(key, value); |
| 214 | + } |
| 215 | + } |
| 216 | + |
| 217 | + if ("IEND".equals(type)) { |
| 218 | + break; |
| 219 | + } |
| 220 | + } |
| 221 | + } |
| 222 | + |
| 223 | + return result; |
| 224 | + } |
| 225 | +} |
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