Author: tilman
Date: Fri Sep 11 19:31:35 2026
New Revision: 1938116
Log:
PDFBOX-5250: add test, by Valery Bokov; closes #529
Modified:
pdfbox/branches/2.0/pdfbox/pom.xml
pdfbox/branches/2.0/pdfbox/src/test/java/org/apache/pdfbox/rendering/TestQuality.java
Modified: pdfbox/branches/2.0/pdfbox/pom.xml
==============================================================================
--- pdfbox/branches/2.0/pdfbox/pom.xml Fri Sep 11 19:31:24 2026
(r1938115)
+++ pdfbox/branches/2.0/pdfbox/pom.xml Fri Sep 11 19:31:35 2026
(r1938116)
@@ -970,6 +970,19 @@
</configuration>
</execution>
<execution>
+ <id>PDFBOX-5250</id>
+ <phase>generate-test-resources</phase>
+ <goals>
+ <goal>wget</goal>
+ </goals>
+ <configuration>
+
<url>https://issues.apache.org/jira/secure/attachment/13073765/PDFBOX-5250-pattern-reduced3.pdf</url>
+
<outputDirectory>${project.build.directory}/pdfs</outputDirectory>
+
<outputFileName>PDFBOX-5250-pattern-reduced3.pdf</outputFileName>
+
<sha512>fef1da8db49531a3bf017c6872b2032cac2d3c7e431f5529a80f87886b2d06455d086c9228ad35aee80d824ffb9e65e5ea302327b7feada001ede66f83199101</sha512>
+ </configuration>
+ </execution>
+ <execution>
<id>PDFBOX-5960</id>
<phase>generate-test-resources</phase>
<goals>
Modified:
pdfbox/branches/2.0/pdfbox/src/test/java/org/apache/pdfbox/rendering/TestQuality.java
==============================================================================
---
pdfbox/branches/2.0/pdfbox/src/test/java/org/apache/pdfbox/rendering/TestQuality.java
Fri Sep 11 19:31:24 2026 (r1938115)
+++
pdfbox/branches/2.0/pdfbox/src/test/java/org/apache/pdfbox/rendering/TestQuality.java
Fri Sep 11 19:31:35 2026 (r1938116)
@@ -107,6 +107,37 @@ public class TestQuality
}
/**
+ * PDFBOX-5250: a mesh shading pattern used inside a transparency group
that has its own
+ * non-trivial /Matrix must be positioned using that group's own initial
matrix, not the
+ * parent's. Before the fix, the transparency group's /Matrix was
concatenated into the CTM
+ * only after the initial matrix had already been captured, so any pattern
painted inside the
+ * group (here, a colored tiling pattern whose cell is itself a
transparency group filled
+ * with a type 7 shading) was placed using the wrong reference matrix.
That shifted the mesh
+ * shading far out of position, so instead of the intended multicolor
gradient, only a
+ * single, mostly-green sliver of it ever landed on the visible glyphs.
+ *
+ * @throws IOException
+ */
+ @Test
+ public void testPDFBox5250() throws IOException
+ {
+ File file = new File(TARGET_PDF_DIR,
"PDFBOX-5250-pattern-reduced3.pdf");
+ PDDocument doc = PDDocument.load(file);
+ PDFRenderer renderer = new PDFRenderer(doc);
+ BufferedImage renderedImage = renderer.renderImageWithDPI(0, 100);
+ // a pixel within the shading-pattern-filled text; before the fix, the
mesh shading
+ // was shifted out of view here, leaving this pixel blank white
instead of the
+ // gradient's red-ish color. Checking red without also ruling out
green isn't enough
+ // because white also has a maxed-out red channel.
+ int rgb = renderedImage.getRGB(190, 331);
+ int red = (rgb >> 16) & 0xFF;
+ int green = (rgb >> 8) & 0xFF;
+ assertTrue("expected a red-ish gradient pixel but was: " +
Integer.toHexString(rgb),
+ red > 150 && green < 150);
+ doc.close();
+ }
+
+ /**
* PDFBOX-5876: rendering a page containing a very large JPEG 2000 (JPX)
image at reduced
* scale must not decode the image at full resolution first just to read
its width, height
* and color space. Before the fix, {@code PDImageXObject.initJPXValues()}
did exactly that,
