From 5649f886f76023532538b8792605a3578cec1ed1 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= Date: Sun, 14 Apr 2013 23:28:36 +0200 Subject: [PATCH] st/mesa: add a simple path to BufferData if it only discards buffer contents Reviewed-by: Brian Paul --- src/mesa/state_tracker/st_cb_bufferobjects.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/src/mesa/state_tracker/st_cb_bufferobjects.c b/src/mesa/state_tracker/st_cb_bufferobjects.c index 8ff32c8..1b3991c 100644 --- a/src/mesa/state_tracker/st_cb_bufferobjects.c +++ b/src/mesa/state_tracker/st_cb_bufferobjects.c @@ -182,6 +182,20 @@ st_bufferobj_data(struct gl_context *ctx, struct st_buffer_object *st_obj = st_buffer_object(obj); unsigned bind, pipe_usage; + if (st_obj->Base.Size == size && st_obj->Base.Usage == usage && data) { + /* Just discard the old contents and write new data. + * This should be the same as creating a new buffer, but we avoid + * a lot of validation in Mesa. + */ + struct pipe_box box; + + u_box_1d(0, size, &box); + pipe->transfer_inline_write(pipe, st_obj->buffer, 0, + PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE, + &box, data, 0, 0); + return GL_TRUE; + } + st_obj->Base.Size = size; st_obj->Base.Usage = usage; -- 2.7.4