libgui: Allow an IGBProducer to disable allocation
Adds a new method IGBP::allowAllocation, which controls whether
dequeueBuffer is permitted to allocate a new buffer. If allocation is
disallowed, dequeueBuffer will block or return an error as it
normally would (as controlled by *ControlledByApp).
If there are free buffers, but they are not of the correct dimensions,
format, or usage, they may be freed if a more suitable buffer is not
found first.
Bug: 19801715
Change-Id: I0d604958b78b2fd775c2547690301423f9a52165
diff --git a/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.cpp b/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.cpp
index 0e94f0d..11cbdc6 100644
--- a/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.cpp
+++ b/services/surfaceflinger/DisplayHardware/VirtualDisplaySurface.cpp
@@ -526,6 +526,10 @@
// TODO: Should we actually allocate buffers for a virtual display?
}
+status_t VirtualDisplaySurface::allowAllocation(bool /* allow */) {
+ return INVALID_OPERATION;
+}
+
void VirtualDisplaySurface::updateQueueBufferOutput(
const QueueBufferOutput& qbo) {
uint32_t w, h, transformHint, numPendingBuffers;