[3171580] Add transform field to native buffers. (DO NOT MERGE)

This field indicate how the content of the buffer
needs to be transformed.

Change-Id: Ide3e980a90599e931406135693231276626adbbb

1 files changed, 13 insertions, 6 deletions

diff --git a/libs/ui/GraphicBuffer.cpp b/libs/ui/GraphicBuffer.cpp
index 828a988..3671954 100644
--- a/libs/ui/GraphicBuffer.cpp
+++ b/libs/ui/GraphicBuffer.cpp
@@ -45,6 +45,7 @@ GraphicBuffer::GraphicBuffer()
     stride = 
     format = 
     usage  = 0;
+    transform = 0;
     handle = NULL;
 }
 
@@ -57,7 +58,8 @@ GraphicBuffer::GraphicBuffer(uint32_t w, uint32_t h,
     height = 
     stride = 
     format = 
-    usage  = 0;
+    usage  =
+    transform = 0;
     handle = NULL;
     mInitCheck = initSize(w, h, reqFormat, reqUsage);
 }
@@ -74,6 +76,7 @@ GraphicBuffer::GraphicBuffer(uint32_t w, uint32_t h,
     stride = inStride;
     format = inFormat;
     usage  = inUsage;
+    transform = 0;
     handle = inHandle;
 }
 
@@ -182,8 +185,10 @@ status_t GraphicBuffer::lock(GGLSurface* sur, uint32_t usage)
     return res;
 }
 
+const int kFlattenFdsOffset = 9;
+
 size_t GraphicBuffer::getFlattenedSize() const {
-    return (8 + (handle ? handle->numInts : 0))*sizeof(int);
+    return (kFlattenFdsOffset + (handle ? handle->numInts : 0))*sizeof(int);
 }
 
 size_t GraphicBuffer::getFdCount() const {
@@ -208,13 +213,14 @@ status_t GraphicBuffer::flatten(void* buffer, size_t size,
     buf[5] = usage;
     buf[6] = 0;
     buf[7] = 0;
+    buf[8] = transform;
 
     if (handle) {
         buf[6] = handle->numFds;
         buf[7] = handle->numInts;
         native_handle_t const* const h = handle;
         memcpy(fds,     h->data,             h->numFds*sizeof(int));
-        memcpy(&buf[8], h->data + h->numFds, h->numInts*sizeof(int));
+        memcpy(&buf[kFlattenFdsOffset], h->data + h->numFds, h->numInts*sizeof(int));
     }
 
     return NO_ERROR;
@@ -223,7 +229,7 @@ status_t GraphicBuffer::flatten(void* buffer, size_t size,
 status_t GraphicBuffer::unflatten(void const* buffer, size_t size,
         int fds[], size_t count)
 {
-    if (size < 8*sizeof(int)) return NO_MEMORY;
+    if (size < kFlattenFdsOffset*sizeof(int)) return NO_MEMORY;
 
     int const* buf = static_cast<int const*>(buffer);
     if (buf[0] != 'GBFR') return BAD_TYPE;
@@ -231,7 +237,7 @@ status_t GraphicBuffer::unflatten(void const* buffer, size_t size,
     const size_t numFds  = buf[6];
     const size_t numInts = buf[7];
 
-    const size_t sizeNeeded = (8 + numInts) * sizeof(int);
+    const size_t sizeNeeded = (kFlattenFdsOffset + numInts) * sizeof(int);
     if (size < sizeNeeded) return NO_MEMORY;
 
     size_t fdCountNeeded = 0;
@@ -248,9 +254,10 @@ status_t GraphicBuffer::unflatten(void const* buffer, size_t size,
         stride = buf[3];
         format = buf[4];
         usage  = buf[5];
+        transform = buf[8];
         native_handle* h = native_handle_create(numFds, numInts);
         memcpy(h->data,          fds,     numFds*sizeof(int));
-        memcpy(h->data + numFds, &buf[8], numInts*sizeof(int));
+        memcpy(h->data + numFds, &buf[kFlattenFdsOffset], numInts*sizeof(int));
         handle = h;
     } else {
         width = height = stride = format = usage = 0;