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/BufferQueue.h b/include/gui/BufferQueue.h
index 6db2c87..1ea22fd 100644
--- a/include/gui/BufferQueue.h
+++ b/include/gui/BufferQueue.h
@@ -116,12 +116,18 @@
// pointed to by the buf argument and a status of OK is returned. If no
// slot is available then a status of -EBUSY is returned and buf is
// unmodified.
+ //
+ // 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.
+ //
// The width and height parameters must be no greater than the minimum of
// GL_MAX_VIEWPORT_DIMS and GL_MAX_TEXTURE_SIZE (see: glGetIntegerv).
// An error due to invalid dimensions might not be reported until
// updateTexImage() is called.
- virtual status_t dequeueBuffer(int *buf, uint32_t width, uint32_t height,
- uint32_t format, uint32_t usage);
+ virtual status_t dequeueBuffer(int *buf, sp<Fence>& fence,
+ uint32_t width, uint32_t height, uint32_t format, uint32_t usage);
// queueBuffer returns a filled buffer to the BufferQueue. In addition, a
// timestamp must be provided for the buffer. The timestamp is in
@@ -220,7 +226,7 @@
// Note that the dependencies on EGL will be removed once we switch to using
// the Android HW Sync HAL.
status_t releaseBuffer(int buf, EGLDisplay display, EGLSyncKHR fence,
- const sp<Fence>& releaseFence = Fence::NO_FENCE);
+ const sp<Fence>& releaseFence);
// consumerConnect connects a consumer to the BufferQueue. Only one
// consumer may be connected, and when that consumer disconnects the