Add sticky transform to surfaceflinger.

Bug: 15116722

- Adds a sticky transform field that can be set from a
  SurfaceFlinger client Surface.  This transform is
  added to any transform applied to the Surface.

Change-Id: Idaa4311dfd027b2d2b8ea5e2c6cba2da5779d753

3 files changed, 21 insertions, 4 deletions

diff --git a/include/gui/BufferQueueProducer.h b/include/gui/BufferQueueProducer.h
index fe8a308..3fc5de2 100644
--- a/include/gui/BufferQueueProducer.h
+++ b/include/gui/BufferQueueProducer.h
@@ -195,6 +195,8 @@ private:
     // most updates).
     String8 mConsumerName;
 
+    uint32_t mStickyTransform;
+
 }; // class BufferQueueProducer
 
 } // namespace android
diff --git a/include/gui/IGraphicBufferProducer.h b/include/gui/IGraphicBufferProducer.h
index 9b96b2b..4e9e810 100644
--- a/include/gui/IGraphicBufferProducer.h
+++ b/include/gui/IGraphicBufferProducer.h
@@ -273,15 +273,18 @@ public:
         // async - if the buffer is queued in asynchronous mode
         // fence - a fence that the consumer must wait on before reading the buffer,
         //         set this to Fence::NO_FENCE if the buffer is ready immediately
+        // sticky - the sticky transform set in Surface (only used by the LEGACY
+        //          camera mode).
         inline QueueBufferInput(int64_t timestamp, bool isAutoTimestamp,
                 const Rect& crop, int scalingMode, uint32_t transform, bool async,
-                const sp<Fence>& fence)
+                const sp<Fence>& fence, uint32_t sticky = 0)
         : timestamp(timestamp), isAutoTimestamp(isAutoTimestamp), crop(crop),
-          scalingMode(scalingMode), transform(transform), async(async),
-          fence(fence) { }
+          scalingMode(scalingMode), transform(transform), stickyTransform(sticky),
+          async(async), fence(fence) { }
         inline void deflate(int64_t* outTimestamp, bool* outIsAutoTimestamp,
                 Rect* outCrop, int* outScalingMode, uint32_t* outTransform,
-                bool* outAsync, sp<Fence>* outFence) const {
+                bool* outAsync, sp<Fence>* outFence,
+                uint32_t* outStickyTransform = NULL) const {
             *outTimestamp = timestamp;
             *outIsAutoTimestamp = bool(isAutoTimestamp);
             *outCrop = crop;
@@ -289,6 +292,9 @@ public:
             *outTransform = transform;
             *outAsync = bool(async);
             *outFence = fence;
+            if (outStickyTransform != NULL) {
+                *outStickyTransform = stickyTransform;
+            }
         }
 
         // Flattenable protocol
@@ -303,6 +309,7 @@ public:
         Rect crop;
         int scalingMode;
         uint32_t transform;
+        uint32_t stickyTransform;
         int async;
         sp<Fence> fence;
     };
diff --git a/include/gui/Surface.h b/include/gui/Surface.h
index dcfe74f..35ab7f6 100644
--- a/include/gui/Surface.h
+++ b/include/gui/Surface.h
@@ -138,6 +138,7 @@ private:
     int dispatchSetBuffersFormat(va_list args);
     int dispatchSetScalingMode(va_list args);
     int dispatchSetBuffersTransform(va_list args);
+    int dispatchSetBuffersStickyTransform(va_list args);
     int dispatchSetBuffersTimestamp(va_list args);
     int dispatchSetCrop(va_list args);
     int dispatchSetPostTransformCrop(va_list args);
@@ -163,6 +164,7 @@ protected:
     virtual int setBuffersFormat(int format);
     virtual int setScalingMode(int mode);
     virtual int setBuffersTransform(int transform);
+    virtual int setBuffersStickyTransform(int transform);
     virtual int setBuffersTimestamp(int64_t timestamp);
     virtual int setCrop(Rect const* rect);
     virtual int setUsage(uint32_t reqUsage);
@@ -231,6 +233,12 @@ private:
     // buffer that gets queued. It is set by calling setTransform.
     uint32_t mTransform;
 
+    // mStickyTransform is a transform that is applied on top of mTransform
+    // in each buffer that is queued.  This is typically used to force the
+    // compositor to apply a transform, and will prevent the transform hint
+    // from being set by the compositor.
+    uint32_t mStickyTransform;
+
      // mDefaultWidth is default width of the buffers, regardless of the
      // native_window_set_buffers_dimensions call.
      uint32_t mDefaultWidth;