Pass fences from BufferQueue to SurfaceTextureClient
ISurfaceTexture::dequeueBuffer now returns the buffer's fence for the
client to wait on. For BufferQueue, this means passing it through
Binder so it can be returned to the SurfaceTextureClient. Now
SurfaceTextureClient is responsible for waiting on the fence in
dequeueBuffer instead of BufferQueue: one step closer to the goal.
Change-Id: I677ae758bcd23acee2d784b8cec11b32cccc196d
diff --git a/include/gui/ISurfaceTexture.h b/include/gui/ISurfaceTexture.h
index 1e33764..019606a 100644
--- a/include/gui/ISurfaceTexture.h
+++ b/include/gui/ISurfaceTexture.h
@@ -25,6 +25,7 @@
#include <binder/IInterface.h>
+#include <ui/Fence.h>
#include <ui/GraphicBuffer.h>
#include <ui/Rect.h>
@@ -67,8 +68,13 @@
// in the contents of its associated buffer contents and call queueBuffer.
// If dequeueBuffer return BUFFER_NEEDS_REALLOCATION, the client is
// expected to call requestBuffer immediately.
- virtual status_t dequeueBuffer(int *slot, uint32_t w, uint32_t h,
- uint32_t format, uint32_t usage) = 0;
+ //
+ // The fence parameter will be updated to hold the fence associated with
+ // the buffer. The contents of the buffer must not be overwritten until the
+ // fence signals. If the fence is NULL, the buffer may be written
+ // immediately.
+ virtual status_t dequeueBuffer(int *slot, sp<Fence>& fence,
+ uint32_t w, uint32_t h, uint32_t format, uint32_t usage) = 0;
// queueBuffer indicates that the client has finished filling in the
// contents of the buffer associated with slot and transfers ownership of