libgui: Add generation numbers to BufferQueue
This change allows producers to set a generation number on a
BufferQueue. This number will be embedded in any new GraphicBuffers
created in that BufferQueue, and attempts to attach buffers which have
a different generation number will fail.
It also plumbs the setGenerationNumber method through Surface, with the
additional effect that any buffers attached to the Surface after
setting a new generation number will automatically be updated with the
new number (as opposed to failing, as would happen on through IGBP).
Bug: 20923096
Change-Id: I32bf726b035f99c3e5834beaf76afb9f01adcbc2
diff --git a/include/ui/GraphicBuffer.h b/include/ui/GraphicBuffer.h
index f91d192..3da720f 100644
--- a/include/ui/GraphicBuffer.h
+++ b/include/ui/GraphicBuffer.h
@@ -94,6 +94,11 @@
Rect getBounds() const { return Rect(width, height); }
uint64_t getId() const { return mId; }
+ uint32_t getGenerationNumber() const { return mGenerationNumber; }
+ void setGenerationNumber(uint32_t generation) {
+ mGenerationNumber = generation;
+ }
+
status_t reallocate(uint32_t inWidth, uint32_t inHeight,
PixelFormat inFormat, uint32_t inUsage);
@@ -166,6 +171,11 @@
sp<ANativeWindowBuffer> mWrappedBuffer;
uint64_t mId;
+
+ // Stores the generation number of this buffer. If this number does not
+ // match the BufferQueue's internal generation number (set through
+ // IGBP::setGenerationNumber), attempts to attach the buffer will fail.
+ uint32_t mGenerationNumber;
};
}; // namespace android