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#Pdf comparator pdf#

It has the maximum size of the expected and the actual image. A new empty BufferedImage is created to take the result of the comparison.

#Pdf comparator pdf#

A page from each Pdf is read and rendered into a BufferedImage by default at 300dpi.

The Two Pdfs to compare are opened with PdfBox.

PdfCompare uses the Apache PdfBox Library to read and write Pdfs. Here is in a nutshell, what PdfCompare does, when it compares two PDFs. It is good to know a few internals, when using the PdfCompare. The can be used to control certain aspects of the system behaviour, in particular memory consumption. There are a few different Implementations of CompareResults with different characteristics. Otherwise it is ignored and only an info level log messages is written.

When set to true, a missing ignore file leads to an exception. When set to false, only pages with differences are added to the result and this the resulting difference PDF document. When set to false, disables all parallel processing and process everything in a single thread. Not that the differencesĪre still marked in the output file, when you addEqualPagesToResult. That way a difference is only reported, when more than the given percentage You can configure a percentage of pixels that are ignored during comparison. If for some reason your rendering is a little off or you allow for some error margin, Percent of pixels that may differ per page.

System specific default, like /tmp on most unix systems. Defaults to the java default for java.io.tmpdir, which usually determines a Sets the directory where to write temporary files. TempDir=System.property("java.io.tmpdir") The actual color is the color that is used for pixels that are there, but were not expected. The last two characters define the blue-portion of the color to use. The next two characters define the green-portion The first two characters define the red-portion of the color in hexadecimal. The colors are specified in HTML-Stlye format (without a leading '#'): The expected color is the color that is used for pixels that were expected, but are not there. Sets the DPI that Pdf pages are rendered with. Through the environment you can configure the memory settings (see above) and the following settings: The SimpleEnvironment delegates all settings, that were not assigned, to the default Environment. Configuring PdfCompare though an APIĪll the settings, that can be changed through the nf file can also be changed programmatically through the API. New ConfigFileEnvironment(.) and pass it to PdfCompare.withEnvironment(.).

Replacement config file with the -Dconfig.file=path/to/file command line argument.Īlternatively you can specify parameters either through a system environment variables or as aĪnother way to specify a different config location programmatically is to create a If you want to specify another configuration file, you can find out more about that here: PdfCompare uses Lightbend Config (previously called TypeSafe Config) to read its configurationįiles. Must be located in the root of the classpath. The default config file is called "nf" and it PdfCompare can be configured with a config file. New PdfComparator( "expected.pdf", "actual.pdf")