kinow commented on a change in pull request #106:
URL: https://github.com/apache/commons-imaging/pull/106#discussion_r523804095
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File path:
src/main/java/org/apache/commons/imaging/formats/tiff/write/TiffImageWriterBase.java
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@@ -330,9 +330,19 @@ public void writeImage(final BufferedImage src, final
OutputStream os, Map<Strin
final int width = src.getWidth();
final int height = src.getHeight();
+ // If the source image has a color model that supports alpha,
+ // this module performs a call to checkForActualAlpha() to see whether
+ // the image that was supplied to the API actually contains
+ // non-opaque data in its alpha channel. It is common for applications
+ // to create a BufferedImage using TYPE_INT_ARGB, and fill the entire
+ // image with opaque pixels. In such a case, the file size of the
output
+ // can be reduced by 25 percent by storing the image in an 3-byte RGB
+ // format. This approach will also make a small reduction in the
runtime
+ // to read the resulting file when it is accessed by an application.
Review comment:
🎉
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