Large Textures on an O2

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Michael Polis (mfp+++at++cs.cmu.edu)
Fri, 03 Oct 1997 11:01:50 -0400

I'm trying to use a large texture (4096x4096, 8 bit luminance) on an
O2. Performer claims to have downloaded it (apparently using an RGBA8
format):
PF Loading texture:
PF File name = phototex.rgb
PF Image size (SxTxR) = 4096x4096x1
PF Download size = 89478496 bytes
PF Download time =6469.723 ms
PF Download rate = 13.190 MB/sec
PF Total texture use = 85.604 MB

Despite this, the resulting texture is only 1024x1024:
  - a 1024x1024 texture flashes on the screen during download
  - xscreen reports that 2.81MB of teture memory is being used
  - The displayed resolution is 1/4 of what it should be, as
determined by counting the number of texels across certain features.

I'm using the 2.0 dev and 2.0.3 eoe with patches 1696 and 1392 as
recommended in the FAQ. The O2 has 192MB of RAM, so it should
theoretically be able to load that texture into memory, even if it was
89MB. I also tried a 2048x2048 version of the texture, but that came
out as 1024x1024 also.

What does is mean when Performer says the download size is 89MB?

Is there something I have to do to explicitly allocate more RAM to
texture memory?
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