Németh Márton wrote:
Hi!
I've tested 4.5.0RC2 with xtest 4.0.10, see http://bugs.xfree86.org/show_bug.cgi?id=1557 for details.
I've attached a test C program which always produces bad rendering using acceleration, and never if XaaNoScreenToScreenCopy is set (=without acceleration). The results are also attached.
Have anyone see souch behaviour?
Have anyone programers manual about 86c764/765 [Trio32/64/64V+] chip?
Is it really only GXclear, GXinvert, and GXset that fail? If so, the diagnosis is pretty easy.
For those three ROPs, it's not really a screen-to-screen blit at all: the source surface is not used. Most S3 chips (Savage included) fail if you attempt to use a two-operand bitblt command when the source is not involved. That's why there is an XAA flag specifically for this case.
The solution is to add
pXAA->ScreenToScreenCopyFlags = ROP_NEEDS_SOURCE;
to the S3AccelInitXxx function at the bottom of the file.-- - Tim Roberts, [EMAIL PROTECTED] Providenza & Boekelheide, Inc.
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