From: Marek Olšák <maraeo@gmail.com>
Date: Sun, 26 Feb 2012 17:48:42 +0000 (+0100)
Subject: gallium/util: set correct usage flags in u_default_transfer_inline_write
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=615baedc778039a2dcd08bbc1b3006c9e5a111dc;p=mesa.git

gallium/util: set correct usage flags in u_default_transfer_inline_write

The DISCARD flags should improve performance in drivers which handle them.
---

diff --git a/src/gallium/auxiliary/util/u_transfer.c b/src/gallium/auxiliary/util/u_transfer.c
index 7e72a59ee00..1fa8d945982 100644
--- a/src/gallium/auxiliary/util/u_transfer.c
+++ b/src/gallium/auxiliary/util/u_transfer.c
@@ -21,6 +21,18 @@ void u_default_transfer_inline_write( struct pipe_context *pipe,
    const uint8_t *src_data = data;
    unsigned i;
 
+   assert(!(usage & PIPE_TRANSFER_READ));
+
+   /* the write flag is implicit by the nature of transfer_inline_write */
+   usage |= PIPE_TRANSFER_WRITE;
+
+   /* transfer_inline_write implicitly discards the rewritten buffer range */
+   if (box->x == 0 && box->width == resource->width0) {
+      usage |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
+   } else {
+      usage |= PIPE_TRANSFER_DISCARD_RANGE;
+   }
+
    transfer = pipe->get_transfer(pipe,
                                  resource,
                                  level,