Module: Mesa
Branch: master
Commit: ce3b34b72702195694ee8fc64c8259d4a16711ab
URL:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=ce3b34b72702195694ee8fc64c8259d4a16711ab
Author: Brian Paul <bri...@vmware.com>
Date: Fri Aug 12 10:44:22 2016 -0600
svga: optimize memcpy() in svga_buffer_update_hw()
When we migrate a buffer from sw/malloc storage to a hardware buffer,
don't memcpy the whole buffer, just copy the part we've written to.
Reviewed-by: Charmaine Lee <charmai...@vmware.com>
---
src/gallium/drivers/svga/svga_resource_buffer_upload.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/src/gallium/drivers/svga/svga_resource_buffer_upload.c
b/src/gallium/drivers/svga/svga_resource_buffer_upload.c
index e1e65c1..7ecf95c 100644
--- a/src/gallium/drivers/svga/svga_resource_buffer_upload.c
+++ b/src/gallium/drivers/svga/svga_resource_buffer_upload.c
@@ -620,6 +620,7 @@ svga_buffer_update_hw(struct svga_context *svga, struct
svga_buffer *sbuf)
enum pipe_error ret;
boolean retry;
void *map;
+ unsigned i;
assert(sbuf->swbuf);
if (!sbuf->swbuf)
@@ -639,7 +640,13 @@ svga_buffer_update_hw(struct svga_context *svga, struct
svga_buffer *sbuf)
return PIPE_ERROR;
}
- memcpy(map, sbuf->swbuf, sbuf->b.b.width0);
+ /* Copy data from malloc'd swbuf to the new hardware buffer */
+ for (i = 0; i < sbuf->map.num_ranges; i++) {
+ unsigned start = sbuf->map.ranges[i].start;
+ unsigned len = sbuf->map.ranges[i].end - start;
+ memcpy((uint8_t *) map + start, (uint8_t *) sbuf->swbuf + start, len);
+ }
+
svga_buffer_hw_storage_unmap(svga, sbuf);
/* This user/malloc buffer is now indistinguishable from a gpu buffer */
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