gallium/util: add upload manager helper module

Add a module that will manage uploading and coalescing multiple
user-buffers, malloc-buffers and other random data that doesn't
happen to be in a GPU buffer already.  The module stuffs multiple
little uploads into larger GPU buffers to reduce create/destroy
overheads, etc.

1 files changed, 75 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/util/u_upload_mgr.h b/src/gallium/auxiliary/util/u_upload_mgr.h
new file mode 100644
index 00000000000..745b5834af6
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_upload_mgr.h
@@ -0,0 +1,75 @@
+/**************************************************************************
+ * 
+ * Copyright 2009 VMware, Inc.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+/* Helper utility for uploading user buffers & other data, and
+ * coalescing small buffers into larger ones.
+ */
+
+#ifndef U_UPLOAD_MGR_H
+#define U_UPLOAD_MGR_H
+
+struct pipe_screen;
+struct pipe_buffer;
+struct u_upload_mgr;
+
+
+struct u_upload_mgr *u_upload_create( struct pipe_screen *screen,
+                                      unsigned default_size,
+                                      unsigned alignment,
+                                      unsigned usage );
+
+void u_upload_destroy( struct u_upload_mgr *upload );
+
+/* Unmap and release old buffer.
+ * 
+ * This must usually be called prior to firing the command stream
+ * which references the upload buffer, as many memory managers either
+ * don't like firing a mapped buffer or cause subsequent maps of a
+ * fired buffer to wait.  For now, it's easiest just to grab a new
+ * buffer.
+ */
+void u_upload_flush( struct u_upload_mgr *upload );
+
+
+enum pipe_error u_upload_data( struct u_upload_mgr *upload,
+                               unsigned size,
+                               const void *data,
+                               unsigned *out_offset,
+                               struct pipe_buffer **outbuf );
+
+
+enum pipe_error u_upload_buffer( struct u_upload_mgr *upload,
+                                 unsigned offset,
+                                 unsigned size,
+                                 struct pipe_buffer *inbuf,
+                                 unsigned *out_offset,
+                                 struct pipe_buffer **outbuf );
+
+
+
+#endif
+