[992] in linux-announce channel archive
Ygl 3.0.0 2d Graphics Library available
daemon@ATHENA.MIT.EDU (Lars Wirzenius)
Fri Sep 1 20:48:27 1995
Date: Fri, 1 Sep 1995 01:30:22 +0300
From: Lars Wirzenius <wirzeniu@cc.helsinki.fi>
To: linux-announce@vger.rutgers.edu
From: news@uunet.uu.net (UseNet News)
Newsgroups: comp.os.linux.announce
Subject: Ygl 3.0.0 2d Graphics Library available
Organization: Theoretische Physik, Uni-GH-Duisburg, Germany
Approved: linux-announce@news.ornl.gov (Lars Wirzenius)
Followup-to: comp.os.linux.x
Hello networld,
Ygl 3.0.0 is available now from ftp.thp.Uni-Duisburg.DE (134.91.141.1),
in files pub/source/X11/Ygl-3.0.0.tar.{Z|gz}.
Ygl emulates SGI's GL (Graphics Language) under X11. It compiles fine
under AIX 3.2, HP-UX 7.0/8.0/9.0, Linux with XFree, SunOS, ConvexOS
and others, but needs an ANSI-C compiler (gcc is ok).
Ygl is distributed under the GNU CopyLeft. See the included LICENSE
file for further details.
Included are most of the two-dimensional graphics routines, the queue
device routines, some query routines, doublebuffering, RGB mode with
arbitrary visuals and dithering and most of the window attribute
routines (see below). =
Several functions and features are added (see below), some bugs are
fixed (see below, too).
The latest version of the ReadMe file is available at the World Wide
Web: The URL is
http://WWW.thp.Uni-Duisburg.DE/Ygl/ReadMe.html
Changes from Version 2.9.5 -> 3.0.0:
------------------------------------
Added dithering to RGBmode. Dithering is controlled by the environment
variable YGL_DITHERSIZE or shorter YGL_DSZ. With this variable you can
specify the size of the dither matrix. The default value is 4, leading
to a 4x4 dither matrix. Valid values range from 0 to 6. On a normal 8
bit TrueColor visual ({3,3,2} bits {red,green,blue}) you obtain
113x113x49 =3D 625681 different "colors" with YGL_DSZ=3D4, leading to an
effective screen depth of approx. 19 bits. The other values and the
effective screendepths are:
| 8 bit (3-3-2) | 12 bit (4-4-4) | 16 bit (6-5-5)
YGL_DSZ| # colors (bits) | # colors (bits) | # colors (bits)
-------------------------------------------------------------
0,1 | 256 ( 8 ) | 4096 (12 ) | 65536 (16 )
2 | 10933 (13.4) | 226981 (17.8) | 3953125 (21.9)
3 | 114688 (16.8) | 2515456 (21.3) | 44531200 (25.4)
4 | 625681 (19.3) | 13997521 (23.7) | 249232081 (27.9)
5 | 2354176 (21.2) | 53157376 (25.7) | 949029376 (29.8)
6 | 6976981 (22.7) |158340421 (27.2) |2831006341 (31.4)
Note that dithering costs speed. You may set YGL_DSZ=3D0 to disable
dithering. If you are lucky and have a 24 bit TrueColor visual, YGL_DSZ
is automatically set to zero.
Affected routines: RGBcolor(), gRGBcolor(), cpack(), c3s(), c3i(),
c3f().
See examples/rgbtest.c for an example.
Added menu stuff. New functions: defpup(), newpup(), addtopup(),
dopup(), freepup(), setpup(). See examples/popup.c for details.
Added C++ support to Ygl.h.
Fixed bugs in FORTRAN bindings. Unfortunately some of the FORTRAN names
are not truncated to 6 chars due to nameing conflicts, SH*T. FORTRAN
bindings must be lowercase...
double_ -> doublebuffer_
gRGBcol_ -> grgbcol_
RGBcol_ -> rgbcol_
RGBmod_ -> rgbmod_
loadXf_ -> loadxf_
getXdpy_ -> getxdpy_
getXwid_ -> getxwid_
getXgc_ -> getxgc_
Fixed bug in gl2ppm() that caused it to fail under newer versions of
AIX32.
getXwid() returned Window* instead of Window, getXgc() returned GC*
instead of GC. Fixed.
Added winX() to FORTRAN bindings.
Fixed cooperation of FORTRAN bindings and YGL_PREFIX.
Changed behaviour of prefposition() and winposition(). The given
values now describe the position of the drawing area, not the position
of the window incl. window manager decorations.
A RGBmode window is now a child of the initially created colormap mode
window. This simplified changing to RGBmode. Ygl now uses the property
WM_COLORMAP_WINDOWS to tell the window manager, which colormaps are to
be installed. This also fixed a bug when a subwindow of a cmap window
was a RGB window. To toggle the colormaps is this case, use the window
manager function f.colormap in twm or f.next_cmap in mwm (see your
window manager manual for details).
Added the function getXdid(). getXdid() returns the window id of the
drawable. This id differs from getXwin() when using RGBmode or
doublebuffering.
Have fun,
Fred
--
---------
Fred Hucht, Institute of Theoretical Physics, University of Duisburg, Ger=
many
Email: fred@thp.Uni-Duisburg.DE
http://WWW.thp.Uni-Duisburg.DE/ ^A^@h|^H=A60!^@`N\200^@@(#).sigvirus =
V0.1^@
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