DRI2: fixup handling of last_swap_target
We need to initialize the swap target, which is passed to the driver to schedule events. Rather than using -1 to indicate that the field is uninitialized, just make sure we initialize it at drawable creation time. Reviewed-by: Mario Kleiner <mario.kleiner@tuebingen.mpg.de> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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@ -116,9 +116,11 @@ DRI2GetDrawable(DrawablePtr pDraw)
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int
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DRI2CreateDrawable(DrawablePtr pDraw)
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{
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DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
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WindowPtr pWin;
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PixmapPtr pPixmap;
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DRI2DrawablePtr pPriv;
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CARD64 ust;
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pPriv = DRI2GetDrawable(pDraw);
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if (pPriv != NULL)
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@ -141,7 +143,10 @@ DRI2CreateDrawable(DrawablePtr pDraw)
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pPriv->swap_count = 0;
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pPriv->target_sbc = -1;
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pPriv->swap_interval = 1;
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pPriv->last_swap_target = -1;
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/* Initialize last swap target from DDX if possible */
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if (!ds->GetMSC || !(*ds->GetMSC)(pDraw, &ust, &pPriv->last_swap_target))
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pPriv->last_swap_target = 0;
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pPriv->swap_limit = 1; /* default to double buffering */
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if (pDraw->type == DRAWABLE_WINDOW)
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@ -579,7 +584,6 @@ DRI2SwapBuffers(ClientPtr client, DrawablePtr pDraw, CARD64 target_msc,
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DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
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DRI2DrawablePtr pPriv;
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DRI2BufferPtr pDestBuffer = NULL, pSrcBuffer = NULL;
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CARD64 ust;
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int ret, i;
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pPriv = DRI2GetDrawable(pDraw);
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@ -620,27 +624,6 @@ DRI2SwapBuffers(ClientPtr client, DrawablePtr pDraw, CARD64 target_msc,
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return Success;
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}
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/*
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* In the simple glXSwapBuffers case, all params will be 0, and we just
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* need to schedule a swap for the last swap target + the swap interval.
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* If the last swap target hasn't been set yet, call into the driver
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* to get the current count.
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*/
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if (target_msc == 0 && divisor == 0 && remainder == 0 &&
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pPriv->last_swap_target < 0) {
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ret = (*ds->GetMSC)(pDraw, &ust, &target_msc);
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if (!ret) {
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xf86DrvMsg(pScreen->myNum, X_ERROR,
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"[DRI2] %s: driver failed to return current MSC\n",
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__func__);
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return BadDrawable;
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}
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}
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/* First swap needs to initialize last_swap_target */
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if (pPriv->last_swap_target < 0)
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pPriv->last_swap_target = target_msc;
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/*
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* Swap target for this swap is last swap target + swap interval since
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* we have to account for the current swap count, interval, and the
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