Grx

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559 discussions

Re: bgi2grx: Borland incompatibility in modes and colors
by Frank Heckenbach 01 Jul '00

01 Jul '00

> if you really need 100% compatibility, just use TP or BP on > a DOS machine. BCC2GRX (and the Pascal interface BGI22GRX) were > designed to make it easy to port programs, not to allow ill formed > programs to work on every platform. I don't think using a few colors without setting a palette is "ill formed". > PS: You should have found another incompability: On several systems > integers are wider than 16 bit causing major trouble ;) We've already provided a work-around (redefinition in the System unit) for a long time. Frank -- Frank Heckenbach, frank(a)g-n-u.de http://fjf.gnu.de/ PGP and GPG keys: http://fjf.gnu.de/plan

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bgi2grx: Borland incompatibility in modes and colors
by Frank Heckenbach 29 Jun '00

29 Jun '00

Hi, I'm a GNU Pascal developer. I'm not subscribed to this list, so please CC any replies to me. As I'm concerned with many of GPC's units, I took a look at the bgi2grx unit which I understand is meant to be compatible to Borland Pascal's Graph unit. I managed to get some sample programs originally written for BP to run with the unit under Linux (svgalib and X11), but noticed some problems with the GraphDriver/GraphMode parameters to InitGraph. In fact, I tried various values (Detect, Vga/Vga{Lo,Med,Hi}, even Cga/CgaC0), but always got the same mode: 640x480/4 in svgalib and 640x480/<color depth of X server> under X11. That's not nice for programs that expect a certain resolution. I think, under X11 it ought to be easy to get a window of any size, and also svgalib supports modes with lower resolutions. If the color depth seems to be the problem, I think using a higher depth should be no problem. E.g., the CGA modes have 320x200 in 4 colors. svgalib supports G320x200x256 on any card AFAIK (maybe also G320x200x16), so the library could just set this mode, map the 4 colors used by the CGA modes to the (ugly) CGA colors (see below), and just ignore the other colors. Since the unit only provides high-level access (i.e., no direct frame buffer), I think the program will not notice the difference. Besides, is there any particular reason why the constants `Detect' and `Current_Driver' are different from the BP values? In particular `Detect' might be problematic, as I guess there are many BP programs that don't bother to use `Detect', but simply write 0. BTW, `CurrentDriver' is written without an `_' in BP. The second point are the color constants. AFAICFO, the library uses the "default" colors, whatever these are. Under svgalib, they're probably the hardware defaults and therefore BP compatible (except for some strange modes like CGA, see above), but under X11, that's not the case. When I start the X server with 8bpp, I seem to get the palette used by the window manager etc., and in 16 or 24 bpp, I just get shades of blue (which are the first few color values). That's problematic for programs that don't set their own palette, and e.g. just use colors 1..3 to draw some things. In 8bpp it might happen (e.g., on my system) that color 2 is black (or something very dark), so this color is just missing, and with more bpp, it's all in dark blue. So I think, to be more compatible, the library should set the VGA default colors in InitGraph. Frank -- Frank Heckenbach, frank(a)g-n-u.de http://fjf.gnu.de/ PGP and GPG keys: http://fjf.gnu.de/plan

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Your GRX project
by Mariano Alvarez Fernandez 28 Jun '00

28 Jun '00

Sorry for the inconvenience, this message is for Richard: I can't reply to you because mails are bounced to me (I don't know why and neither my ISP). If you want use the list instead. Greetings M.Alvarez

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Re: GRX and GNU
by Hartmut Schirmer 25 Jun '00

25 Jun '00

On Mon, 08 May 2000, Richard Stallman wrote: >[I never got a response to this--could we finish the discussion?] OOPS, your message got into the grx-handled folder somehow, sorry. > > GRX should run on every X11R5 & X11R6 (tested on > SPARC, ALPHA, i386) > >I see. > > >I have never heard of doxygen. What does it convert from? > >What does it convert to? > > Reads the sources and transforms special formated comments into doc. > Output is HTML and LaTeX (maybe more). > >Our standard documentation format is Texinfo. So we would like the >documentation to be written in Texinfo, or at least in some format >that can be converted automatically to Texinfo. > >Anyway, doesn't the world have enough doxies already? ;-). >(Doxies are whores.) Yes, yuŽre right. I myself didn't start the documentation because of Texinfo. ItŽs rather difficult on first view (and IŽm familiar with TeX!) > >If substantial changes in the documentation are needed, > >then they don't have to be made *right away* before > >the program becomes a GNU package. They have to be part > >of the plans for future work. > > So GRX should be activley maintained to become a GNU package ? > >We want every GNU package to be maintained. So whenever you stop >maintaining GRX, we would look for someone else to take over. > >That's a general policy to deal with problems that will arise in the >future. If GRX has particular problems *now* that clearly should be >fixed, we need to plan now to solve them. ******************************** I do not maintain GRX any longer ******************************** A few weeks ago I collected all changes from the mailing list, from my private email archive and from a few public net places and set up a unified patch against grx v2.3. This patch also includes BCC2GRX (Borland BGI interface) as I promised to do. Peter Gerwinsky will put it online at www.gnu.de whenever he has some spare time. GRX needs a new maintainer. The major tasks currently are - adding autoconf support for better Linux/Unix build process - starting Texinfo documentation - try to clean up the licence so the Win driver can be integrated - package all things together and release grx v3.0 ! - Support BCC2GRX on other compilers than gcc If *YOU* want to maintain GRX, please send a note to the mailing list grx(a)gnu.de archive http://www.gnu.de/archive/wilma.cgi/grx or drop me a personal email. RMS: Please cc: any further mail concerning GRX to the mailing list if appropriate. Thanks to everyone who send questions, suggestions, patches or other contributions to GRX. Hartmut

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Announce:ctx2pnm
by Mariano Alvarez Fernández 25 Jun '00

25 Jun '00

Hi. I want to announce the ctx2pnm release. It's an add-on for GRX to load/save PNM (PPM, PGM and PBM) graphics files to/from contexts. It's very easy to use. You can download it from: http://www.terra.es/personal/malfer/grx/resourc.htm I want to add to that page links to other GRX resources, if you have some addons or programs using GRX please drop me a note. Greetings, M.Alvarez

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Re: graphic
by Nathalie Jarosz 24 Jun '00

24 Jun '00

-----Message d'origine----- De : Peter Gerwinski <peter(a)gerwinski.de> À : Nathalie Jarosz <njarosz(a)fr.packardbell.org> Cc : gpc(a)gnu.de <gpc(a)gnu.de>; grx(a)gnu.de <grx(a)gnu.de> Date : vendredi 23 juin 2000 10:32 Objet : Re: graphic >> " 2) set the GRX font dir. >> " SET GRXFONT=<directory for the GRX fonts> >> " This is required for GRX graphics text output. Path: <GRX base>/fonts >> " NOTE: You can define a default font directory when compiling GRX. >> " E.g, if you installed the fonts in /usr/local/lib/grx/fonts add >> " CCOPT += -DGRX_DEFAULT_FONT_PATH="/usr/local/lib/grx/fonts" >> " to makedefs.gnu (Linux / GNU-make example) > >For Unix (optional): Put into your `.profile' something like: > > set GRX20DRV=xwin > set GRXFONT=/usr/local/lib/grx/fonts > >... or whereever you have installed the GRX fonts. Is it credible to put "/usr/src/grx-2.3.1/fonts"? >> " 1) Go to GRX base dir and check the makefile and makedefs file >> " for your system setup >> " 2) Switch to src sub dir and check the makefile >> What do you mean by check? >> " 3) run make -f <your makefile> >> " 4) if every thing worked fine go to <GRX base>/test, check the makefile >> " and build all test files / examples: >> " make -f <your makefile> >> Do I have here to put all the makefile.something? > >Under Linux with SVGAlib installed, you can also use: > > make -f makefile.lnx > I did this and the following message appears: "make[1]:entering directory '/usr/src/grx-2.3.1/src' gcc -c -06 -Wall -DLFB_BY_NEAR_POINTER -pipe -fomit-frame-pointer -I. -I. /include -I /include -I .. /addons/printdraw/bitblt.c -o draw /bitblt.o make[1] : gcc : command not found make[1] : *** [draw/bitblt.o] Error 127 make[1] : leaving directory 'usr/src/grx-2.3.1/src' make : *** [static_libs] error 2" What I have to do now? Thanks, Nathalie

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Re: graphic
by Nathalie Jarosz 23 Jun '00

23 Jun '00

-----Message d'origine----- De : Peter Gerwinski <peter(a)gerwinski.de> À : gpc(a)gnu.de <gpc(a)gnu.de> Date : jeudi 22 juin 2000 18:48 Objet : Re: graphic > http://www.gnu.de/software/GRX/ I try to install GRX 2.3.1, I did not succeed: - "unpacking the GRX archive" was ok. - but "set the environment variables" was not: " 1) set the default driver and graphics mode info: " SET GRX20DRV=<driver> gw <width> gh <height> nc <colors> " (very useful but not required) " Available drivers are for " DOS : stdvga, stdega, et4000, cl5426, mach64, ati28800, VESA, " memory " Linux: svgalib, memory " X11 : xwin, memory " 2) set the GRX font dir. " SET GRXFONT=<directory for the GRX fonts> " This is required for GRX graphics text output. Path: <GRX base>/fonts " NOTE: You can define a default font directory when compiling GRX. " E.g, if you installed the fonts in /usr/local/lib/grx/fonts add " CCOPT += -DGRX_DEFAULT_FONT_PATH="/usr/local/lib/grx/fonts" " to makedefs.gnu (Linux / GNU-make example) I don't really understand what I have to do here? - "compiling GRX" was not ok as well: " 1) Go to GRX base dir and check the makefile and makedefs file " for your system setup " 2) Switch to src sub dir and check the makefile What do you mean by check? " 3) run make -f <your makefile> " 4) if every thing worked fine go to <GRX base>/test, check the makefile " and build all test files / examples: " make -f <your makefile> Do I have here to put all the makefile.something? Thank you for your help, Nathalie

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grx-2.3.1 distribution (was: Problem with last patch of grx23)
by Peter Gerwinski 22 Jun '00

22 Jun '00

(Including the GRX mailing list ...) Hello, Maurice and everybody, Maurice Lombardi wrote: > > http://www.gnu.de/software/GRX/grx23.update.000520.gz > > 1 - it is not gzipped It is. Maybe your HTTP client ungzipped it on the fly? > 2 - four hunks failed (with respect to the original grx23.zip, no update) > in highlow.h grdriver.h makebase.dj and makefile.bcc > two (in makebase.dj and makefile.bcc) contain > "return return linefeed" instead of "return linefeed" as end of lines > dtou solves that I `dtou'd the patch. > the other are cosmetic changes (some extra spaces to align consecutive lines) which seem > different between your version of "original" grx23 and the one on simtelnet. > The best is probably to make fresh new diffs rather than to try to modify the present diff file. I went a step further and created a fresh distribution: grx-2.3.1.tar.gz. > 3 - more seriously, compiling tests on grx23 fails at the first file (arctest.c) for not finding > GrLine. [...] The new archive contains these bugfixes. > 4 - [...] > 5 - [...] You obviously have done more important things on GRX. What about merging them into grx-2.3.1 to create grx-2.3.2? Peter -- http://home.pages.de/~Peter.Gerwinski/ - G-N-U GmbH: http://www.g-n-u.de Maintainer GNU Pascal - http://home.pages.de/~GNU-Pascal/ - gpc-19990118 GnuPG key fingerprint: 9E7C 0FC4 8A62 5536 1730 A932 9834 65DB 2143 9422 keys: ftp://ftp.gerwinski.de/pub/keys/ - AntiSpam: http://spam.abuse.net

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Announce:ctx2ppm
by Mariano Alvarez Fernández 14 Jun '00

14 Jun '00

Hi. I want to announce the ctx2ppm release. It's an addon for GRX to load/save PPM graphics files to/from contexts. You can download it from: http://www.terra.es/personal/malfer/grx/resourc.htm I want to add to that page links to other GRX resources, if you have some addons or programs using GRX please drop me a note. Greetings, M.Alvarez

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GrFilledCircleArc(xc,yc,r,start,end,style,<grcolor>)
by Ryan Bulger 14 Jun '00

14 Jun '00

To who it May Consern I'm still using the ancient grx20 library, but if you could tell me how to use this function that is the subject, i would apreciate it a lot. So far, i've figured out that i really don't know how to use it. RSVP. RB ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com

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