Problems with glGetTexImage() & cube maps.

OpenGL OpenGL: Advanced Coding
1

Trying to save cube maps to file I’ve written this code:

Procedure tCubeTexture.SaveTextureInInternalFormat(Stream:tStream);
Var Compressed:Lint;
    CompInfo:tCompressionInfo;
    CompressedImage:Pointer;
    I:Longint;
Begin                      
   Bind(GL_TEXTURE0);
 
   glPixelStorei(GL_UNPACK_ALIGNMENT,1);
  
   // preserve sizes of all compressed faces
   For I:=0 To 5 Do Begin
      CompInfo.CompressedSizes[i]:=Image.Width*Image.Height*3;
   End;
 
   // write headers
   Stream.BlockWrite(Image, SizeOf(Image));
   Stream.BlockWrite(CompInfo, SizeOf(CompInfo));
 
   // write images
   For I:=0 To 5 Do Begin
      GetMem(CompressedImage, CompInfo.CompressedSizes[i]);
 
      glGetTexImage(CubeTarget[i], 0, GL_RGB, GL_UNSIGNED_BYTE, CompressedImage);
 
      glFinish();
 
      Stream.BlockWrite(CompressedImage^, CompInfo.CompressedSizes[i]);
       
      FreeMem(CompressedImage);
   End;
End;

Then I use Photoshop to load the resulting file in a RAW format (Header+512*3072). The result is wrong: i have the same image on all 6 faces of cube map. What might be the problem ?

2

GLIntercept (see other thread) has this same problem witn ATI drivers. So I guess you are using an ATI?

I was tould this was fixed in 4.6 but have not actually tested it.

(ATI drivers just return the same face no matter what face you request)

3

I use Radeon 9500Pro with Catalyst 4.6. I’m going to try 4.7beta, maybe it would help.