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Ghostscript with Tesseract. Headlines Tesseract is a free OCR library, offering some of the best results going. It has 2 different engines within it. The...
Git Policies We use git for development work. If anyone is new to git, I strongly recommend they read (at least the first couple of chapters of) Git it is available...
Artifex IRC Usage We use IRC as a conferencing tool. Currently we have 3 channels: #ghostscript A public channel that anyone can join and ask questions....
Mail Security Periodically we get `security researchers` telling us that our mail setup is prone to spoofing. They suggest that we deploy some of the more modern technologies...
Enabling Tesseract For Ghostscript 9.53 Ghostscript 9.53 contains preliminary support for OCR devices. It relies upon the open source Tesseract and Leptonica libraries...
ClapTrap ClusterHowTo ClusterStructure ClusterWork DeviceMethodsProposal DeviceRemovalCandidates GhostscriptDependencies GhostscriptMemoryManagement...
RunTests Cluster testing Our cluster testing has traditionally been targetted at testing where we build something, and then run lots of test files through it, and...
The Structure of the Artifex Cluster Overview The cluster consists of a central server, and a set of distributed `nodes` that connect into it. The nodes differ in...
Comparing Adobe Acrobat vs. Ghostscript ATS Compare To compare rendering created by Adobe Acrobat with Ghostscript the following process was performed: The ATS...
Visual Studio Tweaks This page documents some tweaks to Visual Studio that I find very useful. These are primarily targetted at VS2019, but many work with older versions...
Updating Release Baselines Sometimes, during development, we`ll make a commit that changes large numbers of diffs (for instance, a change that affects linewidths,...
Ghostscript Diffs http://ghostscript.com/~regression/release gs regressions introduced by Fill stroke commit https://ghostscript.com/~regression/release gs/compare...
Ghostscript Web Preferences The following settings are web preferences of the Ghostscript web. These preferences override the site level preferences in...
How to do stuff with the cluster How to remove jobs from the queue The current queue of jobs is kept on casper in 5 files, one for each `priority` (where priority...
How to use Ghostscript with valgrind Dumb usage Valgrind can be used direct on pretty much any binary, but it is prone to false positives, and the backtraces it gives...
Cluster work This is a list of work that needs to be done on the cluster/notes on work underway/notes on completed work. Windows cluster nodes Windows nodes can now...
GPDL Issues This is the list of issues that need to be solved before we can fold GPDL down onto the master branch and have it tested regularly by the cluster. I`ve...
Results of 9.25 vs 9.25 scan converter fixes, only ppmraw. https://ghostscript.com/~regression/release gs/compare.html#198Bottom of the characters in `State` cut...
Ghostscript/GhostPDL Memory Management Overview (Draft) Ghostscript/GhostPDL memory management is based around what we term `allocators`. Those are built around the...
Ghostscript Dependencies for Development Ghostscript/GhostPDL is fairly self contained, and has few `hard` dependencies other than a supported build system (autoconf...
Running Cluster Jobs The clusterpush.pl script allows you to run a cluster regression on code that has not been committed to git. Usage: clusterpush.pl product...
URW Font Work 1) Enhance the entire base 35 with Greek and Cyrillic as was done forthe 12 fonts in the previous order. Four variations of Courier,Times, and Helvetica...
Pixel Patch Device Method Proposal At various points in Ghostscript, we are forced to convert from an array of pixel values to a series of fill rectangle calls. While...
Ghostscript Diffs http://ghostscript.com/~regression/release gs Michael tests private/comparefiles/Bug692057.pdf.psdcmykog.144.0 https://ghostscript.com/~regression...
Ghostscript Diffs http://ghostscript.com/~regression/release gs/ Ken has identified the following problems and guessed at the following people to look at them. Updated...
Choosing between Ghostscript and MuPDF and http://www.mupdf.com MuPDF are both high quality renderers for page description languages. While there is considerable...
Device Methods Tidy up Proposal Initial, previously discussed work. Remove the following deprecated/obsolete methods:pattern managetile rectangleget alpha bitsdraw...
List of Ghostscript devices (and related files) for removal File name and brief description: DONE gdevwddb.c Microsoft Windows 3.n driver for Ghostscript, using...
ClapTrap Very simple bitmap trapping The problem to be solved. During printing processes one common problem is that of misregistration between inks. Colours are not...
RefactorForLanguages We want to refactor various bits of the GhostPDL internals so as to make a Language Switch build easier. This file is for recording thoughts on...
Digitally signing ghostpdf.inf You must be running a version of Microsoft Windows to use the following tools. Install Visual Studio 2013 (community edition is fine...
HowToAddAClusterUser Make them a user account on casper. This will involve add user and a key. As the regression user, in /home/regression/cluster/users copy...
Top Menu of Ghostscript Web This topic defines the menu structure of the Ghostscript web, used by the TopMenuSkin. 1 Web` Create New...
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Topic revision: r1 - 2006-11-15 - TWikiContributor
 
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