From fa1a66d7fc4fd7854de7958a48e4992edd154489 Mon Sep 17 00:00:00 2001
From: José Fonseca <jrfonseca@tungstengraphics.com>
Date: Mon, 5 Nov 2007 18:04:35 +0000
Subject: Supply buffer usage hints to winsys.

Winsys driver needs some hints in order to allocate the appropriate kind of
memory for the buffer.
---
 src/mesa/state_tracker/st_atom_constbuf.c    |  3 ++-
 src/mesa/state_tracker/st_cb_bufferobjects.c | 20 +++++++++++++++++++-
 src/mesa/state_tracker/st_cb_rasterpos.c     |  7 +++++--
 src/mesa/state_tracker/st_draw.c             |  4 +++-
 4 files changed, 29 insertions(+), 5 deletions(-)

(limited to 'src/mesa/state_tracker')

diff --git a/src/mesa/state_tracker/st_atom_constbuf.c b/src/mesa/state_tracker/st_atom_constbuf.c
index 7da7136676..446250c226 100644
--- a/src/mesa/state_tracker/st_atom_constbuf.c
+++ b/src/mesa/state_tracker/st_atom_constbuf.c
@@ -80,7 +80,8 @@ void st_upload_constants( struct st_context *st,
       }
 
       /* load Mesa constants into the constant buffer */
-      ws->buffer_data(ws, cbuf->buffer, paramBytes, params->ParameterValues);
+      ws->buffer_data(ws, cbuf->buffer, paramBytes, params->ParameterValues,
+                      PIPE_BUFFER_USAGE_CONSTANT);
 
       cbuf->size = paramBytes;
 
diff --git a/src/mesa/state_tracker/st_cb_bufferobjects.c b/src/mesa/state_tracker/st_cb_bufferobjects.c
index a593bd74d1..99e1eb3c7a 100644
--- a/src/mesa/state_tracker/st_cb_bufferobjects.c
+++ b/src/mesa/state_tracker/st_cb_bufferobjects.c
@@ -104,11 +104,29 @@ st_bufferobj_data(GLcontext *ctx,
 {
    struct pipe_context *pipe = st_context(ctx)->pipe;
    struct st_buffer_object *st_obj = st_buffer_object(obj);
+   unsigned buffer_usage;
 
    st_obj->Base.Size = size;
    st_obj->Base.Usage = usage;
+   
+   switch(target) {
+   case GL_PIXEL_PACK_BUFFER_ARB:
+   case GL_PIXEL_UNPACK_BUFFER_ARB:
+      buffer_usage = PIPE_BUFFER_USAGE_PIXEL;
+      break;
+   case GL_ARRAY_BUFFER_ARB:
+      buffer_usage = PIPE_BUFFER_USAGE_VERTEX;
+      break;
+   case GL_ELEMENT_ARRAY_BUFFER_ARB:
+      buffer_usage = PIPE_BUFFER_USAGE_INDEX;
+      break;
+   default:
+      buffer_usage = 0;
+   }
 
-   pipe->winsys->buffer_data( pipe->winsys, st_obj->buffer, size, data );
+   pipe->winsys->buffer_data( pipe->winsys, st_obj->buffer, 
+                              size, data, 
+                              buffer_usage );
 }
 
 
diff --git a/src/mesa/state_tracker/st_cb_rasterpos.c b/src/mesa/state_tracker/st_cb_rasterpos.c
index 40807fc05a..5b97c1ee34 100644
--- a/src/mesa/state_tracker/st_cb_rasterpos.c
+++ b/src/mesa/state_tracker/st_cb_rasterpos.c
@@ -282,7 +282,9 @@ st_RasterPos(GLcontext *ctx, const GLfloat v[4])
       const unsigned size = sizeof(ctx->Current.Attrib);
       const void *data = ctx->Current.Attrib;
       /* colors, texcoords, etc */
-      pipe->winsys->buffer_data(pipe->winsys, buf, size, data);
+      pipe->winsys->buffer_data(pipe->winsys, buf, 
+                                size, data, 
+                                PIPE_BUFFER_USAGE_VERTEX);
       /* position */
       pipe->winsys->buffer_subdata(pipe->winsys, buf,
                                    0, /* offset */
@@ -301,7 +303,8 @@ st_RasterPos(GLcontext *ctx, const GLfloat v[4])
       fb_buf.start_offset = 0;
       pipe->winsys->buffer_data(pipe->winsys, fb_buf.buffer,
                                 fb_buf.size,
-                                NULL); /* data */
+                                NULL, /* data */
+                                PIPE_BUFFER_USAGE_VERTEX);
       if (pipe->set_feedback_buffer)
          pipe->set_feedback_buffer(pipe, 0, &fb_buf);
    }
diff --git a/src/mesa/state_tracker/st_draw.c b/src/mesa/state_tracker/st_draw.c
index c3f33a447e..3e2ed6cada 100644
--- a/src/mesa/state_tracker/st_draw.c
+++ b/src/mesa/state_tracker/st_draw.c
@@ -289,7 +289,9 @@ st_draw_vertices(GLcontext *ctx, unsigned prim,
 
    /* XXX create one-time */
    vbuf = pipe->winsys->buffer_create(pipe->winsys, 32);
-   pipe->winsys->buffer_data(pipe->winsys, vbuf, vertex_bytes, verts);
+   pipe->winsys->buffer_data(pipe->winsys, vbuf, 
+                             vertex_bytes, verts,
+                             PIPE_BUFFER_USAGE_VERTEX);
 
    /* tell pipe about the vertex buffer */
    vbuffer.buffer = vbuf;
-- 
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