[Bug 101592] Very slow performance when rendering scenes with transparency, probably caused by excessive copying (intel_miptree_map())

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101592

--- Comment #5 from Steve Holland <sdh4 at iastate.edu> ---
It seems like for every character rendered the driver is copying the entire
window image back and forth, mipmapping and unmapping the entire window. Not at
all sure why it is necessary. But I understand the API is rather obsolete. 

Really the the sensible destination for improvement effort would be freeglut,
no?   I think GLUT is still a very widely used API.

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