Mesa (mesa_7_7_branch): svga: Ensure buffer size/alignment is not zero.

[Jose Fonseca]

Module: Mesa
Branch: mesa_7_7_branch
Commit: dc298559c6c838d8ad744e07c134a1c8846c9b33
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=dc298559c6c838d8ad744e07c134a1c8846c9b33

Author: José Fonseca <jfonseca at vmware.com>
Date:   Thu Jan 14 15:06:48 2010 +0000

svga: Ensure buffer size/alignment is not zero.

---

 src/gallium/drivers/svga/svga_screen_buffer.c |    3 +++
 src/gallium/drivers/svga/svga_swtnl_backend.c |    6 +++---
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/gallium/drivers/svga/svga_screen_buffer.c b/src/gallium/drivers/svga/svga_screen_buffer.c
index 1f8a889..c014f2e 100644
--- a/src/gallium/drivers/svga/svga_screen_buffer.c
+++ b/src/gallium/drivers/svga/svga_screen_buffer.c
@@ -594,6 +594,9 @@ svga_buffer_create(struct pipe_screen *screen,
    struct svga_screen *ss = svga_screen(screen);
    struct svga_buffer *sbuf;
    
+   assert(size);
+   assert(alignment);
+
    sbuf = CALLOC_STRUCT(svga_buffer);
    if(!sbuf)
       goto error1;
diff --git a/src/gallium/drivers/svga/svga_swtnl_backend.c b/src/gallium/drivers/svga/svga_swtnl_backend.c
index b4f757a..3d82e4f 100644
--- a/src/gallium/drivers/svga/svga_swtnl_backend.c
+++ b/src/gallium/drivers/svga/svga_swtnl_backend.c
@@ -87,13 +87,13 @@ svga_vbuf_render_allocate_vertices( struct vbuf_render *render,
    if (!svga_render->vbuf) {
       svga_render->vbuf_size = MAX2(size, svga_render->vbuf_alloc_size);
       svga_render->vbuf = pipe_buffer_create(screen,
-                                             0,
+                                             16,
                                              PIPE_BUFFER_USAGE_VERTEX,
                                              svga_render->vbuf_size);
       if(!svga_render->vbuf) {
          svga_context_flush(svga, NULL);
          svga_render->vbuf = pipe_buffer_create(screen,
-                                                0,
+                                                16,
                                                 PIPE_BUFFER_USAGE_VERTEX,
                                                 svga_render->vbuf_size);
          assert(svga_render->vbuf);
@@ -259,7 +259,7 @@ svga_vbuf_render_draw( struct vbuf_render *render,
    if (!svga_render->ibuf) {
       svga_render->ibuf_size = MAX2(size, svga_render->ibuf_alloc_size);
       svga_render->ibuf = pipe_buffer_create(screen,
-                                             0,
+                                             2,
                                              PIPE_BUFFER_USAGE_VERTEX,
                                              svga_render->ibuf_size);
       svga_render->ibuf_offset = 0;