libgui: Add support to update buffer geometry.

Add native window properties NATIVE_WINDOW_UPDATE_BUFFERS_GEOMETRY
to the perform function of SurfaceTextureClient and SurfaceTexture
to update the width, height and format of the buffer dynamically
from the client before queue buffer call.

Change-Id: I62447fcf523b507d534085cd0835f55a978c4ead

3 files changed, 33 insertions, 0 deletions

diff --git a/include/gui/BufferQueue.h b/include/gui/BufferQueue.h
index 02598b0..cd38cfe 100644
--- a/include/gui/BufferQueue.h
+++ b/include/gui/BufferQueue.h
@@ -33,6 +33,23 @@
 namespace android {
 // ----------------------------------------------------------------------------
 
+#ifdef QCOM_BSP
+/*
+ * Structure to hold the buffer geometry
+ */
+struct QBufGeometry {
+    int mWidth;
+    int mHeight;
+    int mFormat;
+    QBufGeometry(): mWidth(0), mHeight(0), mFormat(0) {}
+    void set(int w, int h, int f) {
+        mWidth = w;
+        mHeight = h;
+        mFormat = f;
+    }
+};
+#endif
+
 class BufferQueue : public BnSurfaceTexture {
 public:
     enum { MIN_UNDEQUEUED_BUFFERS = 2 };
@@ -156,6 +173,11 @@ public:
     // to calculate the size for the buffer. this will take effect from next
     // dequeue buffer.
     virtual status_t setBuffersSize(int size);
+
+    // update buffer width, height and format for a native buffer
+    // dynamically from the client which will take effect in the next
+    // queue buffer.
+    virtual status_t updateBuffersGeometry(int w, int h, int f);
 #endif
 
     // connect attempts to connect a producer client API to the BufferQueue.
@@ -547,6 +569,11 @@ private:
 
     // mTransformHint is used to optimize for screen rotations
     uint32_t mTransformHint;
+
+#ifdef QCOM_BSP
+    // holds the updated buffer geometry info of the new video resolution.
+    QBufGeometry mNextBufferInfo;
+#endif
 };
 
 // ----------------------------------------------------------------------------
diff --git a/include/gui/ISurfaceTexture.h b/include/gui/ISurfaceTexture.h
index f0beab6..f2a6510 100644
--- a/include/gui/ISurfaceTexture.h
+++ b/include/gui/ISurfaceTexture.h
@@ -172,6 +172,10 @@ public:
    // calculate the size for the buffer. this will take effect from next
    // dequeue buffer.
     virtual status_t setBuffersSize(int size) = 0;
+
+    // update buffer width, height and format information from the client
+    // which will take effect in the next queue buffer.
+    virtual status_t updateBuffersGeometry(int w, int h, int f) = 0;
 #endif
 
     // connect attempts to connect a client API to the SurfaceTexture.  This
diff --git a/include/gui/SurfaceTextureClient.h b/include/gui/SurfaceTextureClient.h
index 108126d..f2b523d 100644
--- a/include/gui/SurfaceTextureClient.h
+++ b/include/gui/SurfaceTextureClient.h
@@ -94,6 +94,7 @@ private:
     int dispatchSetPostTransformCrop(va_list args);
     int dispatchSetUsage(va_list args);
 #ifdef QCOM_BSP
+    int dispatchUpdateBuffersGeometry(va_list args);
     int dispatchSetBuffersSize(va_list args);
 #endif
     int dispatchLock(va_list args);
@@ -107,6 +108,7 @@ protected:
     virtual int query(int what, int* value) const;
     virtual int setSwapInterval(int interval);
 #ifdef QCOM_BSP
+    virtual int updateBuffersGeometry(int w, int h, int f);
     virtual int setBuffersSize(int size);
 #endif
     virtual int lockBuffer_DEPRECATED(ANativeWindowBuffer* buffer);