Lout 3.42 (Was: wikipedia page)

Changes and new features introduced in Version 3.41 [Nov 2020]

3.41 is 3.40 with fixes for two CVEs.

Download 3.41 with

wget https://github.com/william8000/lout/archive/3.41.tar.gz

Bug fixes:

CVE-2019-19918-srcnext in z02.c

CVE-2019-19917-StringQuotedWord in z39.c

Changes and new features introduced in Version 3.42 [Dec 2020]

3.42 has bug fixes, some small enhancements, and updated

build scripts. Existing lout files should work unchanged

and should produce identical output, except for slightly

more accurate placement of some objects.

Download 3.42 with

wget https://github.com/william8000/lout/archive/3.42.tar.gz

Support for embedding PDF and bitmapped images in lout.

Embedding postscript requires pdftops, see PDFTOPS_COM

in externs.h.

Embedding bitmapped images requires ImageMagick convert,

see CONVERT_COM in externs.h.

The embedding code is in z03.c.

Small images are now placed more accurately.

externs.h now defines ALT_SCALE_FACTOR_SHIFT for embedded

images. Lout rounds the scale factor of images with

trunc(SF * available_space / image_size).

If a small image needed a scale factor of 25.9, lout would

round it down to 25, which could leave the image short by

a few points on an A4 or Letter size page.

Increasing ALT_SCALE_FACTOR_SHIFT from 8 to 12 makes image

placement more accurate at the expense of reducing the

largest page from 148m to 9.2m.

The calculations are in FixAndPrintObject() in z23.c.

Improve accuracy of the CM unit. PS_PrintBeforeFirstPage() in

z49.c now writes its value to 3 decimal places instead of

rounded to an integer.

Running 'make install' no longer requires creating or removing

directories. The makefile now works cleanly on Linux with

'make all' and repeated runs of 'make allinstall'.

Reorganized library directory that supports multiple versions of

lout. In the makefile, the default PREFIX is now /usr/local

instead of /home/jeff. The default lib, doc, and man directories

are now under $(PREFIX)/share/lout-$(VERSION)

The makefile now adds more warnings in COPTS.

The makefile now adds $(CFLAGS) to the lout link line.

externs.h has USE_SYSTEM_MALLOC to use the operating system's

malloc and USE_MALLOC_DEBUG to enabled malloc debugging.

Both should normally be disabled (set to 0) but can be

turned on to help locate memory allocation errors.

Memory allocation in z29.c and in z31.c checks USE_SYSTEM_MALLOC.

Add an 'al' debug option to enable all debug flags

in DebugInit() in z27.c.

Add support for segmented postscript files in z03.c by including

a graphic with the syntax @name@start:end

The file 'name' should have a shared postscript prolog, a null,

a shared postscript trailer, and then byte offsets 'start' and

'end' to identify the postscript segment to use.

Add 'static' to several C functions that did not need to be global.

Fix bad memory accesses in DisposeObject() in z07.c.

Fix the fatal error "AdjustSize: Up(x) == x!".

Initialize column and row forward and back pointers

in CopyObject() in z07.c, in insert_split() in z08.c,

in MinSize() in z12.c, and in BreakObject() in z13.c.

The original code did not take into account that rotations

need both column and row pointers initialized.

The uninitialized values would trigger an assert in AdjustSize()

in z16.c. AdjustSize() now prints a warning instead of exiting

in case the initializations did not completely solve the problem.

Fix bad memory access to kerned_glyphs[] in z14.c.

Fix a possible memory overwrite in prg2lout.c

New files:

.gitignore to keep generated files out of git

updateversion.sh to update the version number in lout source files

complout.bat unmaintained script to compile lout in a dos box

makelout.bat unmaintained script to build lout using complout.bat

instlout.bat unmaintained script to install lout in a dos box

From:	William Bader
Subject:	Lout 3.42 (Was: wikipedia page)
Date:	Mon, 12 Apr 2021 00:25:35 +0000