add support for update-on-demand in SurfaceFlinger

1 files changed, 11 insertions, 1 deletions

diff --git a/libs/ui/FramebufferNativeWindow.cpp b/libs/ui/FramebufferNativeWindow.cpp
index 83b333f7e0e1..8c8fd6bb0f9d 100644
--- a/libs/ui/FramebufferNativeWindow.cpp
+++ b/libs/ui/FramebufferNativeWindow.cpp
@@ -76,7 +76,7 @@ private:
  */
 
 FramebufferNativeWindow::FramebufferNativeWindow() 
-    : BASE(), fbDev(0), grDev(0)
+    : BASE(), fbDev(0), grDev(0), mUpdateOnDemand(false)
 {
     hw_module_t const* module;
     if (hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module) == 0) {
@@ -86,6 +86,8 @@ FramebufferNativeWindow::FramebufferNativeWindow()
         int err;
 
         
+        mUpdateOnDemand = (fbDev->setUpdateRect != 0);
+        
         // initialize the buffer FIFO
         mNumBuffers = 2;
         mNumFreeBuffers = 2;
@@ -131,6 +133,14 @@ FramebufferNativeWindow::~FramebufferNativeWindow() {
     framebuffer_close(fbDev);
 }
 
+status_t FramebufferNativeWindow::setUpdateRectangle(const Rect& r) 
+{
+    if (!mUpdateOnDemand) {
+        return INVALID_OPERATION;
+    }
+    return fbDev->setUpdateRect(fbDev, r.left, r.top, r.width(), r.height());
+}
+
 int FramebufferNativeWindow::setSwapInterval(
         android_native_window_t* window, int interval) 
 {