andreacavalli/xserver-multidpi
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Bug #8226: Fixed SetPictureTransform()'s handling of the argument matrix.

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It now recognizes scaled variants of the identity matrix, too.
This commit is contained in:
Tilman Sauerbeck 2006-09-11 19:43:09 +02:00
parent 2b357e9a2f
commit fc30370d14
1 changed files with 13 additions and 7 deletions
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20
render/picture.c
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@ -1459,18 +1459,24 @@ SetPictureClipRegion (PicturePtr pPicture,
return result;
}
static Bool
transformIsIdentity(PictTransform *t)
{
return ((t->matrix[0][0] == t->matrix[1][1]) &&
(t->matrix[0][0] == t->matrix[2][2]) &&
(t->matrix[0][1] == 0) &&
(t->matrix[0][2] == 0) &&
(t->matrix[1][0] == 0) &&
(t->matrix[1][2] == 0) &&
(t->matrix[2][0] == 0) &&
(t->matrix[2][1] == 0));
}
int
SetPictureTransform (PicturePtr pPicture,
PictTransform *transform)
{
static const PictTransform identity = { {
{ xFixed1, 0x00000, 0x00000 },
{ 0x00000, xFixed1, 0x00000 },
{ 0x00000, 0x00000, xFixed1 },
} };
if (transform && memcmp (transform, &identity, sizeof (PictTransform)) == 0)
if (transform && transformIsIdentity (transform))
transform = 0;
if (transform)