From: Dick Rous (dick++at++sgi.com)
Date: 08/29/2002 06:47:31
Hi,
Systems with InfiniteReality graphics running IRIX 6.5.13 and above cannot
apply textures with widths larger than 2048 when using glTexImage2D(), or
larger than 3071 when using gluBuild2DMipmaps().
This limit has always been there (the results of using larger textures
could be unpredictable because of precision issues), but it was not
enforced before Irix 6.5.13.
Hope this helps,
cheers,
Dick.
> -----Original Message-----
> From: Larry E. Ramey [mailto:hydrajak++at++yahoo.com]
> Sent: Monday, August 26, 2002 18:21
> To: info-performer++at++sgi.com
> Subject: [info-performer] Texture problems
>
>
> Hello,
>
>
> I have some suprising results attempting to apply
> large textures to objects.
>
> My program is forked APP-CULL-DRAW and we also forked
> DBASE. (ISEC is still done in APP)
>
> We have 3 machines that we can test on. I have include
> d hinv and gfxinfo at the tail end of this email.
>
>
> I can compile on machine #1 (2.2) or #2 (2.4).
>
> I have an 8192x4096x1 3 compenent RGB file I am
> attempting to use as a texture. When I build on
> machine #1 I can run on #1 and I see my texture.
> HOWEVER, machine #2 and #3 show the polygon WITHOUT
> the texture. (whatever color I choose for the
> vertexes) It is clear that they are attempting to LOAD
> the texture as the program freezes for a while, but
> nothing ever renders.
>
> If I build on machine #2 niether Machine #2 or #3 can
> veiw the texture. (#1 can't run a 2.4 executable)
>
> I am not too suprised that Machine #2 can't view it,
> since this texture is larger than 64MB, but machine 3
> has 4 256M RM10s, certainly enough space.
>
> here is my code:
>
> pfTexture* tex = new pfTexture;
> pfTexEnv* tev = new pfTexEnv;
> assert(tex && tev);
>
> switch (ts->m_texMode){
> case BLEND:
> tev->setMode(PFTE_BLEND);
> break;
> case DECAL:
> tev->setMode(PFTE_DECAL);
> break;
> case MODULATE:
> tev->setMode(PFTE_MODULATE);
> break;
> case REPLACE:
> tev->setMode(PFTE_REPLACE);
> break;
> default:
> cerr<<"we do not support anything but
> decal,modulate,blend, and replace style in
> textures\n"<< endl;
> assert(false);
> }
> if(!tex->loadFile(ts->m_imageName.data())){
> cerr<<"Unrecoverable error reading texture file: "
> <<ts->m_imageName.data()<<endl;
> assert(false);
> }
> tex->setRepeat(PFTEX_WRAP,PFTEX_CLAMP);
>
> uint* dummy;
> int numChannels;
> int nS,nT,nR;
>
> tex->getImage(&dummy,&numChannels,&nS,&nT,&nR);
>
> cout<<"Texinfo: "<<numChannels<<" "<<nS<<" "<<nT<<"
> "<<nR<<" "<<endl;
>
>
> if(numChannels == 3){
> tex->setFormat(PFTEX_INTERNAL_FORMAT,PFTEX_RGB_8);
> }else if(numChannels ==4){
>
> tex->setFormat(PFTEX_INTERNAL_FORMAT,PFTEX_RGBA_8);
> }else{
> cerr<<"Critcal failure in image file. Must be 3 or
> 4 components"<<endl;
> assert(false);
> }
> pfGeoState* gState =
> new(PerformerAdapter::Instance().m_pfARENA)
> pfGeoState;
> gState->setMode(PFSTATE_ENTEXTURE, PF_ON);
> gState->setAttr(PFSTATE_TEXTURE, tex);
> gState->setAttr(PFSTATE_TEXENV,tev);
>
>
> When the program runs this is printed out:
>
> Texinfo: 3 8192 4096 1
>
> This is correct for my texture.
>
>
>
> So I am really at a loss to explain this except that
> something changed between releases of the operating
> system that I don't understand.
>
>
>
>
>
>
>
> #1:
>
> 4 195 MHZ IP27 Processors
> CPU: MIPS R10000 Processor Chip Revision: 2.6
> FPU: MIPS R10010 Floating Point Chip Revision: 2.6
> Graphics board 0 is "KONAL" graphics.
> Managed (":0.0") 1280x1024
> Display has 8 channels
> 4 GEs (of 4), occmask = 0x0f
> 4MB external BEF ram, 32bit path
> 2 RM7 boards (of 2) 1/1/0/0
> Texture Memory: 64MB/64MB/-/-
> Large pixel depth
> 32K cmap, 64K external gamma
> Channel 0:
> Origin = (0,0)
> Video Output: 1280 pixels, 1024 lines, 72.00Hz
> (1280x1024_72.vfo)
>
> uname -R
> 6.5 6.5.10f
> Performer 2.2 is installed.
>
>
>
> Machine #2:
>
> 2 250 MHZ IP27 Processors
> CPU: MIPS R10000 Processor Chip Revision: 3.4
> FPU: MIPS R10010 Floating Point Chip Revision: 3.4
> Graphics board 0 is "KONAL" graphics.
> Managed (":0.0") 1280x1024
> Display has 2 channels
> 2 GEs (of 2), occmask = 0x03
> 4MB external BEF ram, 32bit path
> 1 RM8 board (of 1) 1/0/0/0
> Texture Memory: 64MB/-/-/-
> Small pixel depth
> 32K cmap
> Channel 0:
> Origin = (0,0)
> Video Output: 1280 pixels, 1024 lines, 72.00Hz
> (1280x1024_72.vfo)
>
> uname -R
> 6.5 6.5.17m
> Performer 2.4 is the installed. (The DSOs used to
> point to 2.5 DSO but we changed the softlinks after
> installing 6.5.17m)
>
> Machine #3)
>
> 2 500 MHZ IP35 Processors
> CPU: MIPS R14000 Processor Chip Revision: 1.4
> FPU: MIPS R14010 Floating Point Chip Revision: 1.4
> Graphics board 0 is "KONAD" graphics.
> Managed (":0.0") 1280x1024
> Display has 8 channels
> 4 GEs (of 4), occmask = 0x0f
> 4MB external BEF ram, 32bit path
> 4 RM10 boards (of 4) 1/1/1/1
> Texture Memory: 256MB/256MB/256MB/256MB
> Large pixel depth
> 32K cmap, 64K external gamma
> Channel 0:
> Origin = (0,0)
> Video Output: 1280 pixels, 1024 lines, 60.00Hz
> (1280x1024_60.vfo)
> Channel 1:
> Channel's Source Size: 1280 pixels, 1024
> lines; Origin = (0,0)
> Video Output: 640 pixels, 486 lines, 29.97Hz
> (640x486_30i.vfo)
>
> uname -R
> 6.5 6.5.15m
> This machine also has performer 2.4 installed.
>
> I performer_eoe.sw.2_2 02/11/2002 Performer 2.2.14
> Run-time
> I performer_eoe.sw.2_4 02/11/2002 Performer 2.4.3
> Run-time
> I performer_eoe 02/11/2002 OpenGL Performer
> 2.5 Run-Time Environment
>
>
>
>
>
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Finance - Get real-time stock quotes
> http://finance.yahoo.com
>
> --------------------------------------------------------------
> ---------
> List Archives, Info, FAQ: http://www.sgi.com/software/performer/
> Open Development Project: http://oss.sgi.com/projects/performer/
> Submissions: info-performer++at++sgi.com
> Admin. requests: info-performer-request++at++sgi.com
> --------------------------------------------------------------
> ---------
>
This archive was generated by hypermail 2b29 : Thu Aug 29 2002 - 06:47:43 PDT