Author: jeremias
Date: Wed Sep 17 09:41:14 2008
New Revision: 696365
URL: http://svn.apache.org/viewvc?rev=696365&view=rev
Log:
Bugzilla #45795:
PDF Output: Added support for handling 16-bit alpha channel. They are currently
converted to 8 bits.
Modified:
xmlgraphics/fop/trunk/src/java/org/apache/fop/pdf/AlphaRasterImage.java
xmlgraphics/fop/trunk/status.xml
Modified:
xmlgraphics/fop/trunk/src/java/org/apache/fop/pdf/AlphaRasterImage.java
URL:
http://svn.apache.org/viewvc/xmlgraphics/fop/trunk/src/java/org/apache/fop/pdf/AlphaRasterImage.java?rev=696365&r1=696364&r2=696365&view=diff
==============================================================================
--- xmlgraphics/fop/trunk/src/java/org/apache/fop/pdf/AlphaRasterImage.java
(original)
+++ xmlgraphics/fop/trunk/src/java/org/apache/fop/pdf/AlphaRasterImage.java Wed
Sep 17 09:41:14 2008
@@ -48,6 +48,9 @@
*/
public AlphaRasterImage(String k, Raster alpha) {
this.key = k;
+ //Enable the commented line below if 16-bit alpha channels are desired.
+ //Otherwise, we compress the alpha channel to 8 bit which should be
sufficient.
+ //this.bitsPerComponent = alpha.getSampleModel().getSampleSize(0);
this.bitsPerComponent = 8;
this.colorSpace = new
PDFDeviceColorSpace(PDFDeviceColorSpace.DEVICE_GRAY);
if (alpha == null) {
@@ -148,6 +151,18 @@
alpha.getDataElements(0, y, w, 1, line);
out.write(line);
}
+ } else if (dataType == DataBuffer.TYPE_USHORT) {
+ short[] sline = new short[nbands * w];
+ byte[] line = new byte[nbands * w];
+ for (int y = 0; y < h; y++) {
+ alpha.getDataElements(0, y, w, 1, sline);
+ for (int i = 0; i < w; i++) {
+ //this compresses a 16-bit alpha channel to 8 bits!
+ //we probably don't ever need a 16-bit channel
+ line[i] = (byte)(sline[i] >> 8);
+ }
+ out.write(line);
+ }
} else if (dataType == DataBuffer.TYPE_INT) {
//Is there an better way to get a 8bit raster from a TYPE_INT
raster?
int shift = 24;
Modified: xmlgraphics/fop/trunk/status.xml
URL:
http://svn.apache.org/viewvc/xmlgraphics/fop/trunk/status.xml?rev=696365&r1=696364&r2=696365&view=diff
==============================================================================
--- xmlgraphics/fop/trunk/status.xml (original)
+++ xmlgraphics/fop/trunk/status.xml Wed Sep 17 09:41:14 2008
@@ -53,6 +53,10 @@
<changes>
<release version="FOP Trunk" date="TBD">
+ <action context="Renderers" dev="JM" type="add" fixes-bug="45795">
+ PDF Output: Added support for handling 16-bit alpha channel. They are
currently
+ converted to 8 bits.
+ </action>
<action context="Renderers" dev="JM" type="fix">
PDF Output: Made sure the XMP Metadata stream is never compressed.
</action>
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