[ quesa-Feature Requests-901431 ] Textures should use packed pixel extension

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Feature Requests item #901431, was opened at 2004-02-20 14:40
Message generated for change (Comment added) made by jwwalker
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Category: None
Group: None
Status: Open
Priority: 5
Private: No
Submitted By: Dair Grant (grantd)
Assigned to: Nobody/Anonymous (nobody)
Summary: Textures should use packed pixel extension

Initial Comment:
We currently convert all incoming textures to 32bpp RGBA for 
passing to OpenGL - most OpenGL implementations will now 
support the packed pixel extension, so we should be able to pass 
on 16 or 24 bit pixel data directly rather than copying it.
        
This could also simplify the texture swapping code in IRUpdate.c, 
which  is quite complex and a bit misleading (e.g., 16bpp texture 
data is not really swapped, it's permuted, and yet the variable is 
called 'swap').


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>Comment By: James W. Walker (jwwalker)
Date: 2007-02-11 00:12

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Texture loading now uses 24-bit RGB when there is no alpha channel.  Since
Quesa pixmaps are top to bottom and OpenGL textures are bottom to top, we
need to row-order conversion on the texture data anyway.  So I'm not sure
if there's really much point to this.

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