BufferQueue improvements and APIs changes
this is the first step of a series of improvements to
BufferQueue. A few things happen in this change:
- setSynchronousMode() goes away as well as the SynchronousModeAllowed flag
- BufferQueue now defaults to (what used to be) synchronous mode
- a new "controlled by app" flag is passed when creating consumers and producers
those flags are used to put the BufferQueue in a mode where it
will never block if both flags are set. This is achieved by:
- returning an error from dequeueBuffer() if it would block
- making sure a buffer is always available by replacing
the previous buffer with the new one in queueBuffer()
(note: this is similar to what asynchrnous mode used to be)
Note: in this change EGL's swap-interval 0 is broken; this will be
fixed in another change.
Change-Id: I691f9507d6e2e158287e3039f2a79a4d4434211d
diff --git a/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp b/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
index 7987da3..bd2f5f3 100644
--- a/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
+++ b/services/surfaceflinger/DisplayHardware/FramebufferSurface.cpp
@@ -51,7 +51,7 @@
*/
FramebufferSurface::FramebufferSurface(HWComposer& hwc, int disp) :
- ConsumerBase(new BufferQueue(true, new GraphicBufferAlloc())),
+ ConsumerBase(new BufferQueue(new GraphicBufferAlloc())),
mDisplayType(disp),
mCurrentBufferSlot(-1),
mCurrentBuffer(0),
@@ -64,7 +64,6 @@
GRALLOC_USAGE_HW_COMPOSER);
mBufferQueue->setDefaultBufferFormat(mHwc.getFormat(disp));
mBufferQueue->setDefaultBufferSize(mHwc.getWidth(disp), mHwc.getHeight(disp));
- mBufferQueue->setSynchronousMode(true);
mBufferQueue->setDefaultMaxBufferCount(NUM_FRAMEBUFFER_SURFACE_BUFFERS);
}