From 7a23eb34e1cff1fd3a696a75d3916d3e1bd96e57 Mon Sep 17 00:00:00 2001
From: Naomi Luis <nluis@codeaurora.org>
Date: Wed, 16 Mar 2011 13:32:07 -0700
Subject: [PATCH] libgralloc-qsd8k: support for specifying buffer size during
 allocation

Add support in the gralloc to specify the desired buffer size during
buffer allocation. This is done via a new function in the gralloc(allocSize).

If the specified size is lesser that the calculated size,
set the buffer size to the calculated size.

Change-Id: Iad9609d3b9074dcf3af07430966590078081ab72
---
 libgralloc-qsd8k/gpu.cpp | 17 +++++++++++++++--
 libgralloc-qsd8k/gpu.h   |  4 +++-
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/libgralloc-qsd8k/gpu.cpp b/libgralloc-qsd8k/gpu.cpp
index a2c35b4..6f1420c 100755
--- a/libgralloc-qsd8k/gpu.cpp
+++ b/libgralloc-qsd8k/gpu.cpp
@@ -43,6 +43,7 @@ gpu_context_t::gpu_context_t(Deps& deps, PmemAllocator& pmemAllocator,
     common.module  = const_cast<hw_module_t*>(&module->base.common);
     common.close   = gralloc_close;
     alloc          = gralloc_alloc;
+    allocSize      = gralloc_alloc_size;
     free           = gralloc_free;
 }
 
@@ -313,7 +314,7 @@ void gpu_context_t::getGrallocInformationFromFormat(int inputFormat, int *colorF
 }
 
 int gpu_context_t::alloc_impl(int w, int h, int format, int usage,
-        buffer_handle_t* pHandle, int* pStride) {
+        buffer_handle_t* pHandle, int* pStride, int bufferSize) {
     if (!pHandle || !pStride)
         return -EINVAL;
 
@@ -373,6 +374,8 @@ int gpu_context_t::alloc_impl(int w, int h, int format, int usage,
     if ((ssize_t)size <= 0)
         return -EINVAL;
 
+    size = (bufferSize >= size)? bufferSize : size;
+
     int err;
     if (usage & GRALLOC_USAGE_HW_FB) {
         err = gralloc_alloc_framebuffer(size, usage, pHandle);
@@ -439,7 +442,17 @@ int gpu_context_t::gralloc_alloc(alloc_device_t* dev, int w, int h, int format,
         return -EINVAL;
     }
     gpu_context_t* gpu = reinterpret_cast<gpu_context_t*>(dev);
-    return gpu->alloc_impl(w, h, format, usage, pHandle, pStride);
+    return gpu->alloc_impl(w, h, format, usage, pHandle, pStride, 0);
+}
+
+int gpu_context_t::gralloc_alloc_size(alloc_device_t* dev, int w, int h, int format,
+        int usage, buffer_handle_t* pHandle, int* pStride, int bufferSize)
+{
+    if (!dev) {
+        return -EINVAL;
+    }
+    gpu_context_t* gpu = reinterpret_cast<gpu_context_t*>(dev);
+    return gpu->alloc_impl(w, h, format, usage, pHandle, pStride, bufferSize);
 }
 
 int gpu_context_t::gralloc_free(alloc_device_t* dev,
diff --git a/libgralloc-qsd8k/gpu.h b/libgralloc-qsd8k/gpu.h
index 67a58d8..3789f6c 100755
--- a/libgralloc-qsd8k/gpu.h
+++ b/libgralloc-qsd8k/gpu.h
@@ -60,11 +60,13 @@ class gpu_context_t : public alloc_device_t {
                              int width, int height);
     int free_impl(private_handle_t const* hnd);
     int alloc_impl(int w, int h, int format, int usage,
-            buffer_handle_t* pHandle, int* pStride);
+            buffer_handle_t* pHandle, int* pStride, int bufferSize = 0);
 
     static int gralloc_alloc(alloc_device_t* dev, int w, int h, int format,
             int usage, buffer_handle_t* pHandle, int* pStride);
     static int gralloc_free(alloc_device_t* dev, buffer_handle_t handle);
+    static int gralloc_alloc_size(alloc_device_t* dev, int w, int h, int format,
+            int usage, buffer_handle_t* pHandle, int* pStride, int bufferSize);
     static int gralloc_close(struct hw_device_t *dev);
 
  private: