[sis] 01/01: chore(Core): add a new test case for mask images

[amanin]

This is an automated email from the ASF dual-hosted git repository.

amanin pushed a commit to branch fix/mask-image-is-back
in repository https://gitbox.apache.org/repos/asf/sis.git

commit 2d2f7ef21d9d5e3712cc96294f5a21932c8e5bd7
Author: Alexis Manin <alexis.ma...@geomatys.com>
AuthorDate: Wed Nov 10 17:34:42 2021 +0100

    chore(Core): add a new test case for mask images
    
    ensure working on image subsets works
---
 .../java/org/apache/sis/image/MaskedImageTest.java | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git 
a/core/sis-feature/src/test/java/org/apache/sis/image/MaskedImageTest.java 
b/core/sis-feature/src/test/java/org/apache/sis/image/MaskedImageTest.java
index 7be55e7..b01ec40 100644
--- a/core/sis-feature/src/test/java/org/apache/sis/image/MaskedImageTest.java
+++ b/core/sis-feature/src/test/java/org/apache/sis/image/MaskedImageTest.java
@@ -31,6 +31,7 @@ import java.awt.image.Raster;
 import java.awt.image.RenderedImage;
 import java.awt.image.WritableRaster;
 import org.apache.sis.internal.coverage.j2d.TiledImage;
+import org.apache.sis.test.FeatureAssert;
 import org.apache.sis.test.TestCase;
 import org.apache.sis.util.Debug;
 import org.junit.Test;
@@ -152,6 +153,36 @@ public final strictfp class MaskedImageTest extends 
TestCase {
     }
 
     /**
+     * Ensure that performing a mask on a {@link 
BufferedImage#getSubimage(int, int, int, int) subset of a buffered image}
+     * will return a tile correctly sized.
+     */
+    @Test
+    public void maskSubRegion() {
+        final BufferedImage source = monoTile();
+        final BufferedImage sourceSubset = source.getSubimage(0, 0, 4, 4);
+        final ImageProcessor processor = new ImageProcessor();
+        processor.setFillValues(4);
+        final RenderedImage mask = processor.mask(sourceSubset, new 
Rectangle(0, 0, 2, 2), true);
+
+        final Raster tile = mask.getTile(0, 0);
+        assertEquals("Tile width", mask.getTileWidth(), tile.getWidth());
+        assertEquals("Tile height", mask.getTileHeight(), tile.getHeight());
+
+        // Note: put 5 on pixels that should not be tested, so the test will 
fail if we do not test the right area
+        final RenderedImage expected = monoTile(new int[] {
+                4, 4, 0, 0, 5, 5, 5, 5,
+                4, 4, 0, 0, 5, 5, 5, 5,
+                0, 0, 0, 0, 5, 5, 5, 5,
+                0, 0, 0, 0, 5, 5, 5, 5,
+                5, 5, 5, 5, 5, 5, 5, 5,
+                5, 5, 5, 5, 5, 5, 5, 5,
+                5, 5, 5, 5, 5, 5, 5, 5,
+                5, 5, 5, 5, 5, 5, 5, 5
+        });
+        FeatureAssert.assertPixelsEqual(expected, new Rectangle(4, 4), mask, 
null);
+    }
+
+    /**
      * Tests masking pixels inside a rectangle on the given image.
      * This method is invoked twice, for untiled image and for tiled image.
      */