andreacavalli/xserver-multidpi
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Compute matrix inversion instead of using wire version in RRCrtcTransformSet

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It doesn't make sense to have the client invert this matrix when the server
can do so reasonably efficiently. This avoids weird fixed point rounding
errors when testing the transform against its inverse. Now to fix the
protocol.
This commit is contained in:
Keith Packard 2008-03-17 23:04:49 -07:00
parent 160252d94f
commit 6d3a9e40a4
1 changed files with 2 additions and 3 deletions
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5
randr/rrcrtc.c
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@ -608,8 +608,6 @@ RRCrtcTransformSet (RRCrtcPtr crtc,
PictFilterPtr filter = NULL;
int width = 0, height = 0;
if (!PictureTransformIsInverse (transform, inverse))
return BadMatch;
if (filter_len)
{
filter = PictureFindFilter (crtc->pScreen,
@ -1229,7 +1227,8 @@ ProcRRSetCrtcTransform (ClientPtr client)
return RRErrorBase + BadRRCrtc;
PictTransform_from_xRenderTransform (&transform, &stuff->transform);
PictTransform_from_xRenderTransform (&inverse, &stuff->inverse);
if (!PictureTransformInvert (&inverse, &transform))
return BadMatch;
filter = (char *) (stuff + 1);
nbytes = stuff->nbytesFilter;