gallium: make user vertex buffers optional

This couldn't be split because it would break bisecting.

Summary:
* r300g,r600g: stop using u_vbuf
* r300g,r600g: also report that the FIXED vertex type is unsupported
* u_vbuf: refactor for use in the state tracker
* cso: wire up u_vbuf with cso_context
* st/mesa: conditionally install u_vbuf

2 files changed, 29 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_context.c b/src/mesa/state_tracker/st_context.c
index 0245fd92b3e..b27f2f677b6 100644
--- a/src/mesa/state_tracker/st_context.c
+++ b/src/mesa/state_tracker/st_context.c
@@ -65,6 +65,7 @@
 #include "util/u_inlines.h"
 #include "util/u_upload_mgr.h"
 #include "cso_cache/cso_context.h"
+#include "util/u_vbuf.h"
 
 
 DEBUG_GET_ONCE_BOOL_OPTION(mesa_mvp_dp4, "MESA_MVP_DP4", FALSE)
@@ -111,6 +112,27 @@ st_get_msaa(void)
 }
 
 
+static void st_init_vbuf(struct st_context *st)
+{
+   struct u_vbuf_caps caps;
+
+   u_vbuf_get_caps(st->pipe->screen, &caps);
+
+   /* Create u_vbuf if there is anything unsupported. */
+   if (!caps.fetch_dword_unaligned ||
+       !caps.format_fixed32 ||
+       !caps.format_float16 ||
+       !caps.format_float64 ||
+       !caps.format_norm32 ||
+       !caps.format_scaled32 ||
+       !caps.user_vertex_buffers) {
+      /* XXX user vertex buffers are always uploaded regardless of the CAP. */
+      st->vbuf = u_vbuf_create(st->pipe, &caps);
+      cso_install_vbuf(st->cso_context, st->vbuf);
+   }
+}
+
+
 static struct st_context *
 st_create_context_priv( struct gl_context *ctx, struct pipe_context *pipe )
 {
@@ -134,6 +156,7 @@ st_create_context_priv( struct gl_context *ctx, struct pipe_context *pipe )
    st->uploader = u_upload_create(st->pipe, 65536, 4, PIPE_BIND_VERTEX_BUFFER);
    st->cso_context = cso_create_context(pipe);
 
+   st_init_vbuf(st);
    st_init_atoms( st );
    st_init_bitmap(st);
    st_init_clear(st);
@@ -277,6 +300,9 @@ void st_destroy_context( struct st_context *st )
 
    st_destroy_context_priv(st);
 
+   if (st->vbuf)
+      u_vbuf_destroy(st->vbuf);
+
    cso_destroy_context(cso);
 
    pipe->destroy( pipe );
diff --git a/src/mesa/state_tracker/st_context.h b/src/mesa/state_tracker/st_context.h
index e3d65d97aa5..3ec98ada196 100644
--- a/src/mesa/state_tracker/st_context.h
+++ b/src/mesa/state_tracker/st_context.h
@@ -41,6 +41,7 @@ struct gen_mipmap_state;
 struct st_context;
 struct st_fragment_program;
 struct u_upload_mgr;
+struct u_vbuf;
 
 
 #define ST_NEW_MESA                    (1 << 0) /* Mesa state has changed */
@@ -73,6 +74,8 @@ struct st_context
    struct pipe_context *pipe;
 
    struct u_upload_mgr *uploader;
+   struct u_vbuf *vbuf;
+
    struct draw_context *draw;  /**< For selection/feedback/rastpos only */
    struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */
    struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */