commit df37b62c62f8efd3b5a433f9b4d40d30cec13a31
author Mathias Agopian <mathias@google.com> Mon Aug 10 21:59:56 2009 -0700
committer Mathias Agopian <mathias@google.com> Tue Aug 11 16:12:56 2009 -0700
tree 43c783e665b9e1c47210d3c5a8f929b33acda72f
parent d779f052b4180f347ed0bd725fdfedda504773e5

SurfaceFlinger will now allocate buffers based on the usage specified by the clients. This allows to allocate the right kind of buffer automatically, without having the user to specify anything.

This change makes SurfaceHolder.setType(GPU) obsolete (it's now ignored).
Added an API to android_native_window_t to allow extending the functionality without ever breaking binary compatibility. This is used to implement the new set_usage() API. This API needs to be called by software renderers because the default is to use usage flags suitable for h/w.

libs/surfaceflinger/LayerBitmap.h

diff --git a/libs/surfaceflinger/LayerBitmap.h b/libs/surfaceflinger/LayerBitmap.h
index 22525ce..48ee553 100644
--- a/libs/surfaceflinger/LayerBitmap.h
+++ b/libs/surfaceflinger/LayerBitmap.h
@@ -58,7 +58,8 @@
     };
 
     // creates w * h buffer
-    Buffer(uint32_t w, uint32_t h, PixelFormat format, uint32_t flags = 0);
+    Buffer(uint32_t w, uint32_t h, PixelFormat format,
+            uint32_t reqUsage, uint32_t flags = 0);
 
     // return status
     status_t initCheck() const;
@@ -81,7 +82,7 @@
     Buffer& operator = (const Buffer& rhs);
     const Buffer& operator = (const Buffer& rhs) const;
 
-    status_t initSize(uint32_t w, uint32_t h);
+    status_t initSize(uint32_t w, uint32_t h, uint32_t reqUsage);
 
     ssize_t                 mInitCheck;
     uint32_t                mFlags;
@@ -108,7 +109,7 @@
 
     status_t setSize(uint32_t w, uint32_t h);
 
-    sp<Buffer> allocate();
+    sp<Buffer> allocate(uint32_t reqUsage);
     status_t free();
     
     sp<const Buffer>  getBuffer() const { return mBuffer; }