How could I use 24-bit texels texture?

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pere1++at++VIDEO3.cluny.ensam.fr
Wed, 26 Mar 1997 12:04:08 +0000

        Hello,

        I have a problem with pfTexFormat. I would like to use 24-bit texture
in a special application. In pfTexture reference pages, I saw that the default
4 component internal format is 16-bit texels (PFTEX_RGB_5), I tried
PFTEX_RGBA_8 to set the format to 32-bit texels. This works well but because it
seems too simple, my texture is 2048x2048.

 Image size (SxTxR) = 2048x2048x1
PF Download size = 22369626 bytes
PF Download time =3759.588 ms
PF Download rate = 5.674 MB/sec
PF Total texture use = 21.333 MB
PF This texture uses = 533.333% of 4MB memory
PF Total texture use = 533.333% of 4MB memory

 The hardware texture memory is saturated. But Performer swaps with the main
memory and the image is here at slowly rate but I don't need real time for this
application ( In fact, I want to render 2Dimensional frames faster than
 with Wavefront software). Well, it seems good except that the mapping texture
is not at the right size (2048x2048),it is pixelated. Does it mean that
Performer uses a low level of mipmap texture because the hardware texture
memory is out?

        Thanks to you for your diagnostic!

                                        Christian

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