Grx March 2000

grx@gnu.de

7 participants
8 discussions

Pixmap and SubContext
by Josu Onandia 17 May '00

17 May '00

>Josu Onandia wrote: >> I would like to 'gray' the screen, as in Windows when you shut-down. >> Can anyone suggest an efficient way to do this?. >What about ANDing the screen with a pattern of alternating bits? >Hope this helps, > Peter Thank you, Peter. It works perfectly. But now I've run into another problem: I'm applying the pixmap to a SubContext, not to the whole screen. It seems that the function GrPatternFilledBox doesn´t take this into account, and starts painting at left corner of the screen, not of the SubContext. I suspect that the line (file patfbox.c, function GrPatternFilledBox): (*bltfun)( &CURC->gc_frame,xpos,y1, &p->gp_pxp_source,xcuroff,yoff,fillw,fillh, p->gp_pxp_oper ); should be: (*bltfun)( &CURC->gc_frame, xpos+CURC->gc_xoffset, //adding the subcontext offset y1+CURC->gc_yoffset, //adding the subcontext offset &p->gp_pxp_source,xcuroff,yoff,fillw,fillh, p->gp_pxp_oper ); I've implemented the change, and it works. I wonder if it's a bug or it's something else I'm doing wrong. Josu

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Problems with GrCursor
by Josu Onandia 23 Apr '00

23 Apr '00

Hi all, I've been having problems with the GrDisplayCursor function. In my case, sometimes the cursor is drawn partially. I think I've found the error in GrDisplayCursor. If the cursor is 8 pixels wide, the work area is 16 pixels wide. Let's supose a call to GrDisplayCursor with C->xcord = 323: C->xcord = 323; C->xoffs = 0; C->xsize = 8; C->xwork = 16; ----------------------- call GrDisplayCursor xpos = 323; xsiz = 16; xwrk = 312; ... (save bitmap from 312 to 327) [our cursor goes from 323 to 330] ... xpos = 11; xsiz = 8; if(xsiz > (C->xwork - xpos)) xsiz = C->xwork - xpos; ====> xsiz = 5; (draw a cursor 5 pixels wide) IMHO this is a bug. I think GrDisplayCursor tries to place the cursor in the middle of the work area, but in a coordinate multiple of 8: xwrk = (xpos - (C->xsize >> 1)) & ~7; but sometimes the result lets the cursor partially outside the work area. I think after this line is necesary a correction: if((xpos + C->size) > (xwrk + xsiz)) xwrk += 8; The same applies to vertical coordinates. What do you think about it? Josu Onandia Dpto. I+D Software. e-mail: jonandia(a)fagorautomation.es ---------------------------------------------------- Fagor Automation, S.Coop. Barrio San Andres, s/n - P.O. Box. 144 Mondragon 20500 - SPAIN http://www.fagorautomation.mcc.es

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2.4?
by Ben Sutter 03 Apr '00

03 Apr '00

Greetings everyone, I'm wondering what the status of 2.4 is. Is it still being developed? Is there an estimate for when it might be released? Is it available in its current state for beta testing? Any information would be appreciated. I checked the GRX site (http://www.gnu.de/software/GRX/) but I couldn't find any details. Thanks! Ben

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Re: GRX on Linux.
by Hartmut Schirmer 28 Mar '00

28 Mar '00

Hi, please also CC messages to the GRX mailing list ! Thanks. On Tue, 28 Mar 2000, GianPiero Puccioni wrote: >> First make sure your grx wokrs well with your X installition using the >> test programs. >> >> In case of any problems try the 24/32bpp patch from >> >> http://www.gnu.de/software/GRX/download/grx23.xwin-patch >> >> >Most of the programs worked and almost all with the patches, still some >problems with xcursor and xkey. > > >> You should modify your program to work with real RGB color values >> instead of a color lookuptable: >> >> First call >> >> GrSetRGBcolorMode(); >> >> and use >> >> GrColor GrBuildRGBcolorT(int r,int g,int b); >> GrColor GrBuildRGBcolorR(int r,int g,int b); >> /* ...R Limits r,g,b to 0..255; ...T doesnŽt */ >> >> or >> >> GrColor GrAllocColor(int r,int g,int b); >> >> to calculate the color value from rgb values. >> >> Hope this helps, >> > >Yes, thanks. I was able to modify my old DOS programs to work under >Linux >When I compile, I still have a warning that I can't get rid of: > >passing arg 4 of `GrBuildPixmap' from incompatible pointer type GrColor color_tab[256]; // initialize color_tab GrBuildPixmap(pixels,w,h,color_tab); should work. (Note: untested !) >whatever I give as the type of the color table (GrColorTableP, long, >unsigned long...) but it seems to work. > >Thanks again. > >GianPiero >-- >**************************************************************************** >* Istituto Nazionale di Ottica GianPiero Puccioni * >* Largo E.Fermi 6 E-Mail : gip(a)ino.it * >* I-50125 Firenze - ITALY Tel +39 055 23081 - Fax +39 055 2337755 * >****************************************************************************

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font editor for grx fonts
by Marek Ratajczak 27 Mar '00

27 Mar '00

Hi, I use GRX with DJGPP on DOS. I'm looking for the font editor to change *.fnt for GRX (spacialy add char 127...255, national diacritic chars and math symbols). Where I can find font edytor working in wysiwyg mode (non commercial, GPL licence ......, DOS, Windows or Linux; noone I have can edit *.fnt from GRX) ?. Thanks, Marek Ratajczak *************************************** * ALFAX Software * * ul. Szafera 32 * * 52-216 Wroclaw * * Poland * * e-mail : alfax(a)provider.com.pl * * tel +48 71 368 17 70, +48 605 245 786 * ***************************************

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GRX on Linux.
by GianPiero Puccioni 25 Mar '00

25 Mar '00

Hi, I used GRX with DJGPP on DOS for a while (years ago) and was very happy with it, now I'd like to use it on Linux but I am having a few problems. Compiling and installing was easy and most of the test programs work without problems, but... Is there an archive of this list so I can check if this topic has been discussed before? Or someone can point me to a site that discuss this or has examples written for Linux and X11, if it exists? If the above is not possible.... What I want to do is nothing particular mostly for scientific work. I have an image in a char matrix and I want to display it somewhere on the screen. The first problem was that GRX doesn't do that easily but this I already solved on DOS. My main problem for now is dealing with colors. In DOS usually it was 256 colors and I allocated the colors in col[257] and used it in a GrBuildPixmap(array,xdim,ydim,col) function. But with Linux the window that X11 open is 16M colors (even if I ask for 256) and it seems the old way doesn't work anymore. How do I do that? Another problem is with the mouse it seems it doesn't work well even in some of the test programs. Is there a particular way of using it? Any help? Thanks, GianPiero Puccioni -- **************************************************************************** * Istituto Nazionale di Ottica GianPiero Puccioni * * Largo E.Fermi 6 E-Mail : gip(a)ino.it * * I-50125 Firenze - ITALY Tel +39 055 23081 - Fax +39 055 2337755 * ****************************************************************************

3 2

Mouse in GRX2.3 aint working?
by Ganesh Sivaraman 17 Mar '00

17 Mar '00

Hi, I have been trying to use the mouse with GRX 2.3. But it doesnt work. I am not using GRX for any major programming but what i want is the mouse to work, thats all. Even the simple mousetest program doesnt work. The mouse pointer just stucks at the left corner and thats it. Could anyone provide me with the solution? I feel it is the configuration problem, is it something to do with gpm. Oh yes, I am using Redhat6.0 i386... Thank you, Ganesh

2 2

None
by Ganesh Sivaraman 16 Mar '00

16 Mar '00

subscribe grx ganeshs(a)cc.hut.fi

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Grx March 2000