i915: Added a intel be function to wrap a drm bo handle

src/gallium/winsys/common/intel_drm/intel_be_device.c

@@ -125,6 +125,37 @@ intel_be_user_buffer_create(struct pipe_winsys *winsys, void *ptr, unsigned byte
 	return &buffer->base;
 }
 
+struct pipe_buffer *
+intel_be_buffer_from_handle(struct intel_be_device *device,
+                            const char* name, unsigned handle)
+{
+	struct intel_be_buffer *be_buf = malloc(sizeof(*be_buf));
+	struct pipe_buffer *buffer;
+
+	if (!be_buf)
+		goto err;
+
+	memset(be_buf, 0, sizeof(*be_buf));
+
+	driGenBuffers(device->staticPool, name, 1, &be_buf->driBO, 0, 0, 0);
+    driBOSetReferenced(be_buf->driBO, handle);
+
+	if (0) /** XXX TODO check error */
+		goto err_bo;
+	
+	buffer = &be_buf->base;
+	buffer->refcount = 1;
+	buffer->alignment = 0;
+	buffer->usage = 0;
+	buffer->size = driBOSize(be_buf->driBO);
+
+	return buffer;
+err_bo:
+	free(be_buf);
+err:
+	return NULL;
+}
+
 
 /*
  * Surface functions.
@@ -157,6 +188,7 @@ intel_i915_surface_release(struct pipe_winsys *winsys, struct pipe_surface **s)
 	assert((size_t)"intel_i915_surface_release is deprecated" & 0);
 }
 
+
 /*
  * Fence functions
  */
@@ -189,6 +221,7 @@ intel_be_fence_finish( struct pipe_winsys *sws,
 	return driFenceFinish((struct _DriFenceObject *)fence, flag, 0);
 }
 
+
 /*
  * Misc functions
  */

src/gallium/winsys/common/intel_drm/intel_be_device.h

@@ -48,14 +48,23 @@ struct intel_be_buffer {
 	struct _DriBufferObject *driBO;
 };
 
+/**
+ * Create a be buffer from a drm bo handle
+ *
+ * Takes a reference
+ */
+struct pipe_buffer *
+intel_be_buffer_from_handle(struct intel_be_device *device,
+                            const char* name, unsigned handle);
+
 static INLINE struct intel_be_buffer *
-intel_be_buffer( struct pipe_buffer *buf )
+intel_be_buffer(struct pipe_buffer *buf)
 {
 	return (struct intel_be_buffer *)buf;
 }
 
 static INLINE struct _DriBufferObject *
-dri_bo( struct pipe_buffer *buf )
+dri_bo(struct pipe_buffer *buf)
 {
 	return intel_be_buffer(buf)->driBO;
 }

src/gallium/winsys/dri/intel/intel_screen.c

@@ -49,28 +49,22 @@ intelCreateSurface(struct intel_screen *intelScreen, struct pipe_winsys *winsys,
 static void
 intelCreateSurface(struct intel_screen *intelScreen, struct pipe_winsys *winsys, unsigned handle)
 {
-   struct intel_be_buffer *be_buf = malloc(sizeof(*be_buf));
    struct pipe_screen *screen = intelScreen->base.screen;
    struct pipe_texture *texture;
    struct pipe_texture templat;
    struct pipe_surface *surface;
-   struct pipe_buffer *buffer = &be_buf->base;
+   struct pipe_buffer *buffer;
    unsigned pitch;
 
    assert(intelScreen->front.cpp == 4);
 
-   /* XXX create a intel_be function for this */
-   {
-      driGenBuffers(intelScreen->base.staticPool, "front", 1, &intelScreen->front.buffer, 0, 0, 0);
-      driBOSetReferenced(intelScreen->front.buffer, handle);
+   buffer = intel_be_buffer_from_handle(&intelScreen->base,
+                                        "front", handle);
 
-      memset(be_buf, 0, sizeof(*be_buf));
-      buffer->refcount = 1;
-      buffer->alignment = 0;
-      buffer->usage = 0;
-      buffer->size = driBOSize(intelScreen->front.buffer);
-      be_buf->driBO = intelScreen->front.buffer;
-   }
+   if (!buffer)
+      return;
+
+   intelScreen->front.buffer = dri_bo(buffer);
 
    memset(&templat, 0, sizeof(templat));
    templat.tex_usage |= PIPE_TEXTURE_USAGE_DISPLAY_TARGET;