Subject:
Re: [nanogui] server background
From:
Junior ####@####.####
Date:
28 Dec 2006 22:19:52 +0000
Message-Id: <8A25CAA0E56.00000498ejr@inbox.com>
It seem like using Gd functions such as
GdDrawImageFromFile(wp->psd, 0, 0,wp->width, wp->height,"bg.bmp", 0)
would be a better choice after Redraw. I have a bit of a distortion around the edges (black pixels) that I haven't determine the source yet, but it's away around the ownership issue.
--Jr.
> -----Original Message-----
> From: ####@####.####
> Sent: Tue, 26 Dec 2006 15:17:09 +0100
> To: ####@####.####
> Subject: Re: [nanogui] server background
>
> Hi Jr,
>
> I tried to put the code I wrote as a client directly into the GsInit....
> function.
> Firstly I thought, I cannot use the Gr functions from the server,
> but after some investigation I didnt find any reason to do so.
> So I put it after the GsRedrawScreen function. At this point, I
> think everything what has to be initialized is initialized so far.
>
> /* Force root window screen paint*/
> GsRedrawScreen();
>
> /*REM BEGIN:*/
> //now everything is done. We begin to create the background.
>
> //create pixmap gc, and image
> GR_WINDOW_ID pixid = GrNewPixmap(wp->width, wp->height, 0);
> GR_GC_ID gc = GrNewGC();
> GR_IMAGE_ID imageid = GrLoadImageFromFile("background.gif", 0);
>
> //draw the image to the pixmap
> GrDrawImageToFit(pixid,gc,0,0,wp->width, wp->height, imageid);
>
> //destroy all the stuff not needed any more
> GrFreeImage(imageid);
> GrDestroyGC(gc);
>
> //set it to the root windows backgound
> GrSetBackgroundPixmap (GR_ROOT_WINDOW_ID,pixid,0);
>
> //redraw it again.
> GsRedrawScreen();
> /*REM END*/
>
> The problem here is that the GrNewPixmap function does not
> set any owner since there is no clinet which could own it.
> At first everything looks fine. But when the first client is destroyed
> and
> the Server had been compiled with the VERBOSE flag, it will die in
> GsPrintResources() as DPRINTF("%d(%d),", pp->id, pp->owner->id);
> is called and our pixmap above has a null pointer in pp->owner.
>
> As I could see, owner is only used here for debugging and in
> GsDestroyClientResources() to determine all pixmaps created by a client
> which has closed its connection. I modified GsPrintResources() to
>
> DPRINTF("%d(%d),", pp->id, /*REM*/(pp->owner?pp->owner->id:0));
>
> and left GsDestroyClientResources() as it is.
> This looks like its working. But I didnt make much testing about this.
> I simply tried with several ntetris', nxterms and the nanowm. I didnt
> notice anything bad, but one should think about it again before using it.
>
> Bye
>
>
> Junior wrote:
>
> >I've used the below code to create a GR_PIXMAP *bgpm, so as to use in
> the root window structure (wp->bgpixmap)
>>
> >/-- code snip
>> bgpm->x = 0;
>> bgpm->y = 0;
>> bgpm->width = psd->xvirtres;
>> bgpm->height = psd->yvirtres;
>> bgpm->psd = psd;
>> GrDrawImageFromFile(bgpm->id, bggc, 0, 0,psd->xvirtres,
>> psd->yvirtres,"background.bmp", 0);
>> bgpm->owner = NULL;
>> bgpm->next = NULL;
>> end snip --/
>>
> >Although I didn't get any segfault from this code nothing happens until
> I do the following:
> >/-- snip
> >// psd->FillRect(psd, 0, 0, psd->xvirtres-1, psd->yvirtres-1,
> >// GdFindColor(psd, wp->background));
>>
>> GrDrawImageFromFile(GR_ROOT_WINDOW_ID, bggc, 0, 0,psd->xvirtres,
>> psd->yvirtres,"/Images/background.bmp", 0);
> >-- end snip --/
>>
> >If I do the above without a GR_PIXMAP*, the background pixmap will
> appear for a brief second as GsRedrawScreen() is
> >called erases it.
> >Now, with GR_PIXMAP* GsRedrawScreen() does not erase it but strangely
> enough killing one of two clients also kills the server.
> >That is, if I have nano-X server and two clients (nanowm, app-x),
> killing app-x kills nano-X also.
>>
> >I also find it strange that GsWpDrawBackgroundPixmap(wp, bgpm, 0, 0,
> psd->xvirtres, psd->yvirtres) does not do what I'm trying to accomplish.
>>
> >If anyone have any ideas, I'll like to hear them. I know I must be
> missing something but what it is I'm trying to find out.
>>
> >Thanks,
> >--Jr.
>>
>>
>>
>>
>>
> >>-----Original Message-----
> >>From: ####@####.####
> >>Sent: Thu, 21 Dec 2006 10:45:18 -0800
> >>To: ####@####.####
> >>Subject: Re: [nanogui] server background
>>>
> >>I've been working in that area, trying to determine why I'm getting a
> >>segfault when I create and use wp->bgpixmap.
>>>
> >>Unless I misunderstood what this is, wp->bgpixmap in GsInitialize(), I
> >>take to be the background image. Correct?
> >>That's default to NULL.
>>>
> >>I created a GR_PIXMAP variable populate it (say GR_PIXMAP *bgpm).
> >>However, When I try to create bgpm->id, I get a segault if I do this
> just
> >>before wp initializes and not if I do it at the start of the function.
>>>
> >>I'll add a code snip when I get back to working on it.
>>>
> >>Thanks,
> >>Jr.
>>>
>>>
>>>
>>>
> >>>-----Original Message-----
> >>>From: ####@####.####
> >>>Sent: Wed, 20 Dec 2006 20:52:32 +0100
> >>>To: ####@####.####
> >>>Subject: Re: [nanogui] server background
>>>>
> >>>Hi Jr,
>>>>
> >>>in this case I would try to hack it in the GsInitialize function in
> >>>srvmain.c.
> >>>I think this is the position where the root window is created. It
> should
> >>>also
> >>>be possible to do it the same way than in the example I wrote. You
> >>>should try
> >>>to find out what functions are called by the Gr.... routines and use
> >>>them in GsInitialize.
>>>>
> >>>But ts a good idea to show a picture instead of a blank screen. What
> >>>about the running cat
> >>>of the microwindows webpage?
>>>>
> >>>cheers
>>>>
> >>>Junior wrote:
>>>>
>>>>
>>>>
> >>>>Hi Roberto,
> >>>>Thanks. This will work but I'm trying to do it in the server. That
> is,
>>>>>
>>>>>
> >>>when the server starts, it will use a specific background instead of a
> >>>color. I'm trying to hack the server code to do it. In this way,
> instead
> >>>of a blank display if he client fails, I'll show a background.
>>>>
>>>>
> >>>>--Jr.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
> >>>>>-----Original Message-----
> >>>>>From: ####@####.####
> >>>>>Sent: Sun, 17 Dec 2006 16:24:07 +0100
> >>>>>To: ####@####.####
> >>>>>Subject: Re: [nanogui] server background
>>>>>>
> >>>>>Hi Jr,
>>>>>>
> >>>>>I played a little with your problem. You may create a pixmap and use
> >>>>>GrSetBackgroundPixmap to map it to the GR_ROOT_WINDOW_ID.
>>>>>>
> >>>>>You may try this code:
>>>>>>
> >>>>>#include <microwin/nano-X.h>
>>>>>>
> >>>>>int main(int argc, char** argv)
> >>>>>{
>>>>>> GR_SCREEN_INFO si;
>>>>>> GR_GC_ID gc;
>>>>>>
>>>>>> if (GrOpen() < 0)
>>>>>> return -1;
>>>>>>
>>>>>> //get screen info and gc
>>>>>> GrGetScreenInfo(&si);
>>>>>> gc = GrNewGC();
>>>>>>
>>>>>>
>>>>>> //create pixmap and image
>>>>>> GR_WINDOW_ID pid = GrNewPixmap(si.cols,si.rows,0);
>>>>>> GR_IMAGE_ID imageid = GrLoadImageFromFile("background.gif", 0);
>>>>>>
>>>>>> //draw the image to the pixmap
>>>>>> GrDrawImageToFit(pid,gc,0,0,si.cols, si.rows, imageid);
>>>>>>
>>>>>> //destreoy all the stuff not needed any more
>>>>>> GrFreeImage(imageid);
>>>>>> GrDestroyGC(gc);
>>>>>>
>>>>>> //set it to the root windows backgound
>>>>>> GrSetBackgroundPixmap (GR_ROOT_WINDOW_ID,pid,0);
>>>>>> GrClearWindow(GR_ROOT_WINDOW_ID,GR_TRUE);
>>>>>>
>>>>>> //select close event
>>>>>> GR_EVENT event; /* current event */
>>>>>>
>>>>>> GrSelectEvents(GR_ROOT_WINDOW_ID, GR_EVENT_MASK_CLOSE_REQ);
>>>>>>
>>>>>> //wait until server shuts down
>>>>>> while(1)
>>>>>> {
>>>>>> GrCheckNextEvent(&event);
>>>>>> if(event.type == GR_EVENT_TYPE_CLOSE_REQ)
>>>>>> break;
>>>>>> }
>>>>>>
>>>>>> GrClose();
>>>>>>
> >>>>>}
>>>>>>
> >>>>>Junior wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
> >>>>>>Hi All,
> >>>>>>How do I change the nanoX background to an image instead of a
> colour?
>>>>>>>
> >>>>>>Thanks,
> >>>>>>--Jr.
>>>>>>>
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>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
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>>>>>
>>>>>
>>>>>
>>>>>
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>>>>
>>>>
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>>>
>>
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>>
>>
>>
>>
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