FBO render to cubemap broken on catalyst 6.7?

OpenGL OpenGL: Advanced Coding
1

Hiya,

I upgraded my ATI9500 drivers from 6.5 to 6.7 and now I can’t render to cubemap using FBOs…

This is the code i’m using…

FBO creation time:

glGenTextures(1,&rt.texID); 
glGenFramebuffersEXT(1,&rt.fbo);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT,rt.fbo);
    glBindTexture(GL_TEXTURE_CUBE_MAP_ARB,rt.texID);   

//Need to set here a filter indicating we are /are NOT going to use mipmaps. If not, a FRAMEBUFFER_UNSUPPORTED will be returned by glCheckFramebufferStatusEXT because we didn't defined a complete mipmap chain??

glTexParameteri ( GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
glTexParameteri ( GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
glTexParameteri ( GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
glTexParameteri ( GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_NEAREST ); 

GLenum i;  
for ( i=0; i<6; ++i )
{
   glTexImage2D ( GL_TEXTURE_CUBE_MAP_POSITIVE_X+i, 0, GL_RGB16, w, h, 0, GL_RGB, GL_UNSIGNED_SHORT, 0 );
   glFramebufferTexture2DEXT ( GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_CUBE_MAP_POSITIVE_X+i, rt.texID, 0);
}

glGenRenderbuffersEXT(1,&rt.fboDepth);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT,rt.fboDepth);
glRenderbufferStorageEXT ( GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, w, h );
glFramebufferRenderbufferEXT ( GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,GL_RENDERBUFFER_EXT, rt.fboDepth );

//Check if all attachments are correct
GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if ( status!=GL_FRAMEBUFFER_COMPLETE_EXT )
{
   //blah blah
}

FBO render time:

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT,rt.fbo);  

glFramebufferRenderbufferEXT ( GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, rt.fboDepth );

GLenum f;
for ( f=0; f<6; ++f ) 
{
   glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,GL_COLOR_ATTACHMENT0_EXT,GL_TEXTURE_CUBE_MAP_POSITIVE_X+f,rt.texID,0);
   glClear ( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    .... draw each cubemap face....
}

Do you notice something bad there? Well it works on ATI cat6.5 and NVIDIA. Crashes badly on cat.6.7 causing a big exception (attempt to write at 0x00000000 in ATI DLL driver file ). My PC is a Duron 1000, 1,5Gb RAM, ATI9500 64Mb AGP.

Also a petition for the ARB… Could you include in the FBO spec a render-to-cubemap CLEAR example please?

2

More specifically brokes in address:

0x691efdd4

at

atioglxx.dll C:\WINDOWS\system32\atioglxx.dll N/A N/A No symbols loaded. 87 6.14.10.5949 19/07/2006 4:13 69000000-694F3000

Error message is

First-chance exception at 0x691efdd4 in mySample18.exe: 0xC0000005: Access violation writing location 0x00000000

and occurs when I do the

glFramebufferTexture2DEXT ( GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_CUBE_MAP_POSITIVE_X+i, rt.texID, 0 )

call with “i==0”

ofc if I go back to cat6.5 or use an NVIDIA card works… Btw I’m using WinXP SP2 32-bits I forgot to mention it.

Also tryed to use GL_RGB8 instead of that GL_RGB16 but nothing… crash is still there…

Also tested the code with the NVPerfKit with maximum validation… and got no errors with NVIDIA drivers so I assume is an ATI driver problem?

3

btw, I tryed the Humus examples with Catalyst 6.7 and all crashes strangely… Rollbacking to 6.5 or 6.6 works well… I tryed with two different computers ( one with w2k ati 9800 and other with winXP ati 9500 ) and same result on both…

4

Anybody having these problems too pls?

5

I made a quick test a week ago and noticed a crash in one app using FBOs, but haven’t had time to investigate yet.

6

thx Humus for looking. If you need some test app or whatever to test just tell me, I’m desperated 8(

7

A test app always helps. If you have one, please send it to epersson ‘at’ ati.com and I’ll take a look at it.

8

no matter Humus… Catalyst 6.8 solved the problem :smiley: No longer crashes, thx