FOP-2821: 1 bit image fails when using PreloaderRawPNG

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1843560 13f79535-47bb-0310-9956-ffa450edef68

fop-core/src/main/java/org/apache/fop/render/pdf/AbstractImageAdapter.java

 import org.apache.commons.logging.LogFactory;
 
 import org.apache.xmlgraphics.image.loader.Image;
+import org.apache.xmlgraphics.image.loader.impl.ImageRawPNG;
 import org.apache.xmlgraphics.image.loader.impl.ImageRendered;
 import org.apache.xmlgraphics.java2d.color.profile.ColorProfileUtil;
 
 
         dict.put("ColorSpace", indexed);
 
-        Raster raster = ((ImageRendered)image).getRenderedImage().getTile(0, 0);
-        if (raster.getDataBuffer() instanceof DataBufferByte) {
-            dict.put("BitsPerComponent", icm.getPixelSize());
+        int bits = 8;
+        if (image instanceof ImageRawPNG) {
+            bits = ((ImageRawPNG) image).getBitDepth();
         } else {
-            dict.put("BitsPerComponent", 8);
+            Raster raster = ((ImageRendered) image).getRenderedImage().getTile(0, 0);
+            if (raster.getDataBuffer() instanceof DataBufferByte) {
+                bits = icm.getPixelSize();
+            }
         }
+        dict.put("BitsPerComponent", bits);
 
         Integer index = getIndexOfFirstTransparentColorInPalette(icm);
         if (index != null) {

fop-core/src/test/java/org/apache/fop/render/pdf/ImageRawPNGAdapterTestCase.java

         PDFICCStream iccStream = irpnga.getICCStream();
         assertTrue(ColorProfileUtil.isDefaultsRGB(iccStream.getICCProfile()));
     }
+
+    @Test
+    public void test1BitPNG() throws IOException {
+        ImageRawPNG imageRawPNG = new ImageRawPNG(null, null,
+                new IndexColorModel(1, 1, new byte[3], 0, false), 1, null);
+        ImageRawPNGAdapter imageRawPNGAdapter = new ImageRawPNGAdapter(imageRawPNG, null);
+        PDFDocument pdfDocument = new PDFDocument("");
+        PDFDictionary pdfDictionary = new PDFDictionary();
+        pdfDictionary.setDocument(pdfDocument);
+        imageRawPNGAdapter.populateXObjectDictionary(pdfDictionary);
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        pdfDictionary.output(bos);
+        assertEquals(bos.toString(), "<< /ColorSpace [/Indexed /DeviceGray 0 <00>] /BitsPerComponent 1 >>");
+    }
 }