This allows ddx to set swap_limit if there is more than one back
buffer for drawable. Setting swap_limit has to also check if change
affects a client that is blocked.
This can be used to implement N-buffering in driver with minimal
logic in allocation and selecting next back.
Signed-off-by: Pauli Nieminen <ext-pauli.niemi...@nokia.com>
---
hw/xfree86/dri2/dri2.c | 23 +++++++++++++++++++++++
hw/xfree86/dri2/dri2.h | 1 +
2 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/hw/xfree86/dri2/dri2.c b/hw/xfree86/dri2/dri2.c
index ecb4a4e..255fed0 100644
--- a/hw/xfree86/dri2/dri2.c
+++ b/hw/xfree86/dri2/dri2.c
@@ -191,6 +191,29 @@ DRI2AllocateDrawable(DrawablePtr pDraw)
return pPriv;
}
+Bool
+DRI2SwapLimit(DrawablePtr pDraw, int swap_limit)
+{
+ DRI2DrawablePtr pPriv = DRI2GetDrawable(pDraw);
+ if (!pPriv)
+ return FALSE;
+
+ pPriv->swap_limit = swap_limit;
+
+ /* Check throttling */
+ if (pPriv->swapsPending >= pPriv->swap_limit)
+ return TRUE;
+
+ if (pPriv->target_sbc == -1 && !pPriv->blockedOnMsc) {
+ if (pPriv->blockedClient) {
+ AttendClient(pPriv->blockedClient);
+ pPriv->blockedClient = NULL;
+ }
+ }
+
+ return TRUE;
+}
+
typedef struct DRI2DrawableRefRec {
XID id;
XID dri2_id;
diff --git a/hw/xfree86/dri2/dri2.h b/hw/xfree86/dri2/dri2.h
index 531d801..3d01c55 100644
--- a/hw/xfree86/dri2/dri2.h
+++ b/hw/xfree86/dri2/dri2.h
@@ -265,6 +265,7 @@ extern _X_EXPORT DRI2BufferPtr
*DRI2GetBuffersWithFormat(DrawablePtr pDraw,
int *out_count);
extern _X_EXPORT void DRI2SwapInterval(DrawablePtr pDrawable, int interval);
+extern _X_EXPORT Bool DRI2SwapLimit(DrawablePtr pDraw, int swap_limit);
extern _X_EXPORT int DRI2SwapBuffers(ClientPtr client, DrawablePtr pDrawable,
CARD64 target_msc, CARD64 divisor,
CARD64 remainder, CARD64 *swap_target,
--
1.7.0.4
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