On Thu, 6 Jul 2006, Martin Piwowarski wrote:
How the graphic card stores texture data when compressed formats like DTX are
used? Are they stored still in compressed format or are they decompressed
during allocating and storing in the texture memory? So is the size in the
memory equally to the texture file size?
My understanding is that the textures are stored compressed. Since all of
the S3TC compression modes are fixed-compression schemes, it is not difficult
for the graphics card to decode them when it's time for displaying them.
Lots of the literature I've read tout compressed textures as a way to reduce
both bandwidth and video memory usage, which implies that they are stored
correct.
--
____ __ Eric Sokolowsky (GST) NASA Goddard Space Flight Center
/ __/__/_/__ Visualization Programmer Scientific Visualization Studio
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