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-rw-r--r--src/mga_exa.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/src/mga_exa.c b/src/mga_exa.c
index 6c39f97..066215f 100644
--- a/src/mga_exa.c
+++ b/src/mga_exa.c
@@ -350,6 +350,8 @@ static Bool
mgaCheckComposite(int op, PicturePtr pSrcPict, PicturePtr pMaskPict,
PicturePtr pDstPict)
{
+ MGAPtr pMga = xf86Screens[pSrcPict->pDrawable->pScreen->myNum]->driverPrivate;
+
if (op >= sizeof(mgaBlendOp) / sizeof(mgaBlendOp[0])) {
DEBUG_MSG(("unsupported op %x\n", op));
return FALSE;
@@ -373,10 +375,9 @@ mgaCheckComposite(int op, PicturePtr pSrcPict, PicturePtr pMaskPict,
return FALSE;
}
- /* FIXME
- * Doing this operation in hardware is broken atm :/
- */
- if (op == PictOpAdd && pSrcPict->format == PICT_a8 &&
+ /* Only the G550 can perform Add on A8 textures, it seems. */
+ if (pMga->Chipset != PCI_CHIP_MGAG550 &&
+ op == PictOpAdd && pSrcPict->format == PICT_a8 &&
pDstPict->format == PICT_a8)
return FALSE;