test: extend COG export georeferencing coverage

Author: mephdrac

core/src/test/java/org/mapfish/print/output/MapCogExportOutputFormatTest.java

@@ -9,6 +9,7 @@
 import java.util.HashMap;
 import java.util.Map;
 import org.geotools.api.coverage.grid.GridCoverageReader;
+import org.geotools.api.referencing.operation.MathTransform;
 import org.geotools.coverage.grid.GridCoverage2D;
 import org.geotools.gce.geotiff.GeoTiffFormat;
 import org.junit.jupiter.api.Test;
@@ -71,4 +72,112 @@ public void testCogExport() throws Exception {
       reader.dispose();
     }
   }
+
+  @Test
+  public void testCogExportWithCenterAndScale() throws Exception {
+    final Configuration config = configurationFactory.getConfig(getFile(BASE_DIR + "config.yaml"));
+
+    final PJsonObject requestData =
+        parseJSONObjectFromFile(
+            MapCogExportOutputFormatTest.class, BASE_DIR + "requestData-center.json");
+
+    final OutputFormat format = this.outputFormat.get("cogMapOutputFormat");
+
+    final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+
+    format.print(
+        new HashMap<>(),
+        requestData,
+        config,
+        getFile(MapCogExportOutputFormatTest.class, BASE_DIR),
+        getTaskDirectory(),
+        outputStream);
+
+    final GeoTiffFormat geoTiffFormat = new GeoTiffFormat();
+    final GridCoverageReader reader =
+        geoTiffFormat.getReader(new ByteArrayInputStream(outputStream.toByteArray()));
+
+    assertNotNull(reader);
+
+    try {
+      final GridCoverage2D coverage = (GridCoverage2D) reader.read(null);
+
+      final MathTransform gridToCRS = coverage.getGridGeometry().getGridToCRS();
+
+      final double[] gridCenter = {
+        coverage.getRenderedImage().getWidth() / 2.0, coverage.getRenderedImage().getHeight() / 2.0
+      };
+
+      final double[] worldCenter = new double[2];
+
+      gridToCRS.transform(gridCenter, 0, worldCenter, 0, 1);
+
+      assertEquals(637395.386, worldCenter[0], 0.000001);
+      assertEquals(5788326.345, worldCenter[1], 0.000001);
+
+    } finally {
+      reader.dispose();
+    }
+  }
+
+  @Test
+  public void testCogExportWithRotation() throws Exception {
+    final Configuration config = configurationFactory.getConfig(getFile(BASE_DIR + "config.yaml"));
+
+    final PJsonObject requestData =
+        parseJSONObjectFromFile(
+            MapCogExportOutputFormatTest.class, BASE_DIR + "requestData-center-rotation.json");
+
+    final OutputFormat format = this.outputFormat.get("cogMapOutputFormat");
+
+    final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+
+    format.print(
+        new HashMap<>(),
+        requestData,
+        config,
+        getFile(MapCogExportOutputFormatTest.class, BASE_DIR),
+        getTaskDirectory(),
+        outputStream);
+
+    final GeoTiffFormat geoTiffFormat = new GeoTiffFormat();
+    final GridCoverageReader reader =
+        geoTiffFormat.getReader(new ByteArrayInputStream(outputStream.toByteArray()));
+
+    assertNotNull(reader);
+
+    try {
+      final GridCoverage2D coverage = (GridCoverage2D) reader.read(null);
+
+      final MathTransform gridToCRS = coverage.getGridGeometry().getGridToCRS();
+
+      final double[] gridCenter = {
+        coverage.getRenderedImage().getWidth() / 2.0, coverage.getRenderedImage().getHeight() / 2.0
+      };
+
+      final double[] worldCenter = new double[2];
+
+      gridToCRS.transform(gridCenter, 0, worldCenter, 0, 1);
+
+      assertEquals(637395.386, worldCenter[0], 0.000001);
+      assertEquals(5788326.345, worldCenter[1], 0.000001);
+
+      final double[] gridRight = {gridCenter[0] + 100.0, gridCenter[1]};
+
+      final double[] worldRight = new double[2];
+
+      gridToCRS.transform(gridRight, 0, worldRight, 0, 1);
+
+      final double expectedDistance = 100.0 * 3600.0 * 0.0254 / 72.0;
+
+      final double expectedOffset = expectedDistance / Math.sqrt(2.0);
+
+      assertEquals(expectedOffset, worldRight[0] - worldCenter[0], 0.000001);
+
+      assertEquals(expectedOffset, worldRight[1] - worldCenter[1], 0.000001);
+
+    } finally {
+      reader.dispose();
+    }
+  }
 }

core/src/test/resources/org/mapfish/print/output/map_cog/requestData-center-rotation.json

@@ -0,0 +1,14 @@
+{
+  "layout": "main",
+  "outputFormat": "cog",
+  "attributes": {
+    "map": {
+      "center": [637395.386, 5788326.345],
+      "scale": 3600,
+      "projection": "EPSG:25832",
+      "dpi": 72,
+      "rotation": 45,
+      "layers": []
+    }
+  }
+}

core/src/test/resources/org/mapfish/print/output/map_cog/requestData-center.json

@@ -0,0 +1,14 @@
+{
+  "layout": "main",
+  "outputFormat": "cog",
+  "attributes": {
+    "map": {
+      "center": [637395.386, 5788326.345],
+      "scale": 3600,
+      "projection": "EPSG:25832",
+      "dpi": 72,
+      "rotation": 0,
+      "layers": []
+    }
+  }
+}