gallium/util: Use PIPE_TRANSFER_DISCARD_RANGE in pipe_buffer_write.

Additionally, to discarding the whole buffer, use
PIPE_TRANSFER_DISCARD_RANGE in pipe_buffer_write when the
write covers only part of the buffer.

Signed-off-by: Mathias Fröhlich <Mathias.Froehlich@web.de>

diff --git a/src/gallium/auxiliary/util/u_inlines.h b/src/gallium/auxiliary/util/u_inlines.h
index aed8ba7df43c096bd97ce1f99c62ecb67c623ddf..ddb81b5b95700df0f9c768507524b83d996886e4 100644 (file)
--- a/src/gallium/auxiliary/util/u_inlines.h
+++ b/src/gallium/auxiliary/util/u_inlines.h
@@ -303,6 +303,8 @@ pipe_buffer_write(struct pipe_context *pipe,
 
    if (offset == 0 && size == buf->width0) {
       usage |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
+   } else {
+      usage |= PIPE_TRANSFER_DISCARD_RANGE;
    }
 
    u_box_1d(offset, size, &box);