fix [2211532] improves sholes graphics performance

Instead of using glTex{Sub}Image2D() to refresh the textures, we're using an EGLImageKHR object
backed up by a gralloc buffer. The data is updated using memcpy(). This is faster than
glTex{Sub}Image2D() because the texture is not swizzled. It also uses less memory because
EGLImageKHW is not limited to power-of-two dimensions.

1 files changed, 3 insertions, 0 deletions

diff --git a/libs/surfaceflinger/Layer.h b/libs/surfaceflinger/Layer.h
index 702c51a..57b3dfa 100644
--- a/libs/surfaceflinger/Layer.h
+++ b/libs/surfaceflinger/Layer.h
@@ -85,6 +85,8 @@ private:
     }
  
     void reloadTexture(const Region& dirty);
+    status_t initializeEglImageLocked(
+            const sp<GraphicBuffer>& buffer, Texture* texture);
 
     uint32_t getEffectiveUsage(uint32_t usage) const;
 
@@ -118,6 +120,7 @@ private:
             // protected by mLock
             sp<GraphicBuffer> mBuffers[NUM_BUFFERS];
             Texture         mTextures[NUM_BUFFERS];
+            sp<GraphicBuffer> mHybridBuffer;
             uint32_t        mWidth;
             uint32_t        mHeight;