Detect undersize buffers being delivered by ANativeWindow

src/Main/FrameBufferAndroid.cpp

@@ -32,7 +32,6 @@ namespace sw
     {
         copy(source, format);
 		nativeWindow->queueBuffer(nativeWindow, buffer, -1);
-
 		if (buffer && locked)
 		{
 			locked = 0;
@@ -65,6 +64,13 @@ namespace sw
             return NULL;
         }
 
+		if ((buffer->width < width) || (buffer->height < height))
+		{
+			ALOGI("lock failed: buffer of %dx%d too small for window of %dx%d",
+				  buffer->width, buffer->height, width, height);
+			return NULL;
+		}
+
 		switch(buffer->format)
 		{
 		default: ALOGE("Unsupported buffer format %d", buffer->format); ASSERT(false);