gallium: remove aux_vertex_buffer_slot code

The slot index is always 0, and is pretty unlikely to change in the future.

Reviewed-by: Brian Paul <brianp@vmware.com>

11 files changed, 45 insertions, 95 deletions

diff --git a/src/gallium/auxiliary/cso_cache/cso_context.c b/src/gallium/auxiliary/cso_cache/cso_context.c
index 3a3a63a332..e3d46f3c8d 100644
--- a/src/gallium/auxiliary/cso_cache/cso_context.c
+++ b/src/gallium/auxiliary/cso_cache/cso_context.c
@@ -87,9 +87,8 @@ struct cso_context {
     */
    int max_sampler_seen;
 
-   struct pipe_vertex_buffer aux_vertex_buffer_current;
-   struct pipe_vertex_buffer aux_vertex_buffer_saved;
-   unsigned aux_vertex_buffer_index;
+   struct pipe_vertex_buffer vertex_buffer0_current;
+   struct pipe_vertex_buffer vertex_buffer0_saved;
 
    struct pipe_constant_buffer aux_constbuf_current[PIPE_SHADER_TYPES];
    struct pipe_constant_buffer aux_constbuf_saved[PIPE_SHADER_TYPES];
@@ -291,8 +290,7 @@ static void cso_init_vbuf(struct cso_context *cso, unsigned flags)
 
    /* Install u_vbuf if there is anything unsupported. */
    if (u_vbuf_get_caps(cso->pipe->screen, &caps, flags)) {
-      cso->vbuf = u_vbuf_create(cso->pipe, &caps,
-                                cso->aux_vertex_buffer_index);
+      cso->vbuf = u_vbuf_create(cso->pipe, &caps);
    }
 }
 
@@ -313,8 +311,6 @@ cso_create_context(struct pipe_context *pipe, unsigned u_vbuf_flags)
    ctx->pipe = pipe;
    ctx->sample_mask = ~0;
 
-   ctx->aux_vertex_buffer_index = 0; /* 0 for now */
-
    cso_init_vbuf(ctx, u_vbuf_flags);
 
    /* Enable for testing: */
@@ -417,8 +413,8 @@ void cso_destroy_context( struct cso_context *ctx )
    util_unreference_framebuffer_state(&ctx->fb);
    util_unreference_framebuffer_state(&ctx->fb_saved);
 
-   pipe_vertex_buffer_unreference(&ctx->aux_vertex_buffer_current);
-   pipe_vertex_buffer_unreference(&ctx->aux_vertex_buffer_saved);
+   pipe_vertex_buffer_unreference(&ctx->vertex_buffer0_current);
+   pipe_vertex_buffer_unreference(&ctx->vertex_buffer0_saved);
 
    for (i = 0; i < PIPE_SHADER_TYPES; i++) {
       pipe_resource_reference(&ctx->aux_constbuf_current[i].buffer, NULL);
@@ -1158,15 +1154,12 @@ void cso_set_vertex_buffers(struct cso_context *ctx,
 
    /* Save what's in the auxiliary slot, so that we can save and restore it
     * for meta ops. */
-   if (start_slot <= ctx->aux_vertex_buffer_index &&
-       start_slot+count > ctx->aux_vertex_buffer_index) {
+   if (start_slot == 0) {
       if (buffers) {
-         const struct pipe_vertex_buffer *vb =
-               buffers + (ctx->aux_vertex_buffer_index - start_slot);
-
-         pipe_vertex_buffer_reference(&ctx->aux_vertex_buffer_current, vb);
+         pipe_vertex_buffer_reference(&ctx->vertex_buffer0_current,
+                                      buffers);
       } else {
-         pipe_vertex_buffer_unreference(&ctx->aux_vertex_buffer_current);
+         pipe_vertex_buffer_unreference(&ctx->vertex_buffer0_current);
       }
    }
 
@@ -1174,41 +1167,34 @@ void cso_set_vertex_buffers(struct cso_context *ctx,
 }
 
 static void
-cso_save_aux_vertex_buffer_slot(struct cso_context *ctx)
+cso_save_vertex_buffer0(struct cso_context *ctx)
 {
    struct u_vbuf *vbuf = ctx->vbuf;
 
    if (vbuf) {
-      u_vbuf_save_aux_vertex_buffer_slot(vbuf);
+      u_vbuf_save_vertex_buffer0(vbuf);
       return;
    }
 
-   pipe_vertex_buffer_reference(&ctx->aux_vertex_buffer_saved,
-                                &ctx->aux_vertex_buffer_current);
+   pipe_vertex_buffer_reference(&ctx->vertex_buffer0_saved,
+                                &ctx->vertex_buffer0_current);
 }
 
 static void
-cso_restore_aux_vertex_buffer_slot(struct cso_context *ctx)
+cso_restore_vertex_buffer0(struct cso_context *ctx)
 {
    struct u_vbuf *vbuf = ctx->vbuf;
 
    if (vbuf) {
-      u_vbuf_restore_aux_vertex_buffer_slot(vbuf);
+      u_vbuf_restore_vertex_buffer0(vbuf);
       return;
    }
 
-   cso_set_vertex_buffers(ctx, ctx->aux_vertex_buffer_index, 1,
-                          &ctx->aux_vertex_buffer_saved);
-   pipe_vertex_buffer_unreference(&ctx->aux_vertex_buffer_saved);
-}
-
-unsigned cso_get_aux_vertex_buffer_slot(struct cso_context *ctx)
-{
-   return ctx->aux_vertex_buffer_index;
+   cso_set_vertex_buffers(ctx, 0, 1, &ctx->vertex_buffer0_saved);
+   pipe_vertex_buffer_unreference(&ctx->vertex_buffer0_saved);
 }
 
 
-
 void
 cso_single_sampler(struct cso_context *ctx, enum pipe_shader_type shader_stage,
                    unsigned idx, const struct pipe_sampler_state *templ)
@@ -1595,7 +1581,7 @@ cso_save_state(struct cso_context *cso, unsigned state_mask)
    cso->saved_state = state_mask;
 
    if (state_mask & CSO_BIT_AUX_VERTEX_BUFFER_SLOT)
-      cso_save_aux_vertex_buffer_slot(cso);
+      cso_save_vertex_buffer0(cso);
    if (state_mask & CSO_BIT_BLEND)
       cso_save_blend(cso);
    if (state_mask & CSO_BIT_DEPTH_STENCIL_ALPHA)
@@ -1650,7 +1636,7 @@ cso_restore_state(struct cso_context *cso)
    assert(state_mask);
 
    if (state_mask & CSO_BIT_AUX_VERTEX_BUFFER_SLOT)
-      cso_restore_aux_vertex_buffer_slot(cso);
+      cso_restore_vertex_buffer0(cso);
    if (state_mask & CSO_BIT_BLEND)
       cso_restore_blend(cso);
    if (state_mask & CSO_BIT_DEPTH_STENCIL_ALPHA)
diff --git a/src/gallium/auxiliary/cso_cache/cso_context.h b/src/gallium/auxiliary/cso_cache/cso_context.h
index 3a4e808f0c..d3501fb92e 100644
--- a/src/gallium/auxiliary/cso_cache/cso_context.h
+++ b/src/gallium/auxiliary/cso_cache/cso_context.h
@@ -87,11 +87,6 @@ void cso_set_vertex_buffers(struct cso_context *ctx,
                             unsigned start_slot, unsigned count,
                             const struct pipe_vertex_buffer *buffers);
 
-/* One vertex buffer slot is provided with the save/restore functionality.
- * cso_context chooses the slot, it can be non-zero. */
-unsigned cso_get_aux_vertex_buffer_slot(struct cso_context *ctx);
-
-
 void cso_set_stream_outputs(struct cso_context *ctx,
                             unsigned num_targets,
                             struct pipe_stream_output_target **targets,
diff --git a/src/gallium/auxiliary/hud/hud_context.c b/src/gallium/auxiliary/hud/hud_context.c
index 1baaabbb38..6ed9ccffdb 100644
--- a/src/gallium/auxiliary/hud/hud_context.c
+++ b/src/gallium/auxiliary/hud/hud_context.c
@@ -90,8 +90,7 @@ hud_draw_colored_prims(struct hud_context *hud, unsigned prim,
    hud->constants.scale[1] = yscale;
    cso_set_constant_buffer(cso, PIPE_SHADER_VERTEX, 0, &hud->constbuf);
 
-   cso_set_vertex_buffers(cso, cso_get_aux_vertex_buffer_slot(cso),
-                          1, &hud->color_prims.vbuf);
+   cso_set_vertex_buffers(cso, 0, 1, &hud->color_prims.vbuf);
    cso_set_fragment_shader_handle(hud->cso, hud->fs_color);
    cso_draw_arrays(cso, prim, 0, num_vertices);
 
@@ -561,16 +560,14 @@ hud_draw_results(struct hud_context *hud, struct pipe_resource *tex)
       hud->constants.scale[1] = 1;
 
       cso_set_constant_buffer(cso, PIPE_SHADER_VERTEX, 0, &hud->constbuf);
-      cso_set_vertex_buffers(cso, cso_get_aux_vertex_buffer_slot(cso), 1,
-                             &hud->bg.vbuf);
+      cso_set_vertex_buffers(cso, 0, 1, &hud->bg.vbuf);
       cso_draw_arrays(cso, PIPE_PRIM_QUADS, 0, hud->bg.num_vertices);
    }
    pipe_resource_reference(&hud->bg.vbuf.buffer.resource, NULL);
 
    /* draw accumulated vertices for text */
    if (hud->text.num_vertices) {
-      cso_set_vertex_buffers(cso, cso_get_aux_vertex_buffer_slot(cso), 1,
-                             &hud->text.vbuf);
+      cso_set_vertex_buffers(cso, 0, 1, &hud->text.vbuf);
       cso_set_fragment_shader_handle(hud->cso, hud->fs_text);
       cso_draw_arrays(cso, PIPE_PRIM_QUADS, 0, hud->text.num_vertices);
    }
@@ -598,8 +595,7 @@ hud_draw_results(struct hud_context *hud, struct pipe_resource *tex)
    cso_set_constant_buffer(cso, PIPE_SHADER_VERTEX, 0, &hud->constbuf);
 
    if (hud->whitelines.num_vertices) {
-      cso_set_vertex_buffers(cso, cso_get_aux_vertex_buffer_slot(cso), 1,
-                             &hud->whitelines.vbuf);
+      cso_set_vertex_buffers(cso, 0, 1, &hud->whitelines.vbuf);
       cso_set_fragment_shader_handle(hud->cso, hud->fs_color);
       cso_draw_arrays(cso, PIPE_PRIM_LINES, 0, hud->whitelines.num_vertices);
    }
@@ -1868,7 +1864,7 @@ hud_create(struct cso_context *cso, struct hud_context *share)
    for (i = 0; i < 2; i++) {
       hud->velems[i].src_offset = i * 2 * sizeof(float);
       hud->velems[i].src_format = PIPE_FORMAT_R32G32_FLOAT;
-      hud->velems[i].vertex_buffer_index = cso_get_aux_vertex_buffer_slot(cso);
+      hud->velems[i].vertex_buffer_index = 0;
    }
 
    /* sampler state (for font drawing) */
diff --git a/src/gallium/auxiliary/util/u_blit.c b/src/gallium/auxiliary/util/u_blit.c
index d1571cd1f5..9a43c2f655 100644
--- a/src/gallium/auxiliary/util/u_blit.c
+++ b/src/gallium/auxiliary/util/u_blit.c
@@ -112,7 +112,7 @@ util_create_blit(struct pipe_context *pipe, struct cso_context *cso)
    for (i = 0; i < 2; i++) {
       ctx->velem[i].src_offset = i * 4 * sizeof(float);
       ctx->velem[i].instance_divisor = 0;
-      ctx->velem[i].vertex_buffer_index = cso_get_aux_vertex_buffer_slot(cso);
+      ctx->velem[i].vertex_buffer_index = 0;
       ctx->velem[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
    }
 
@@ -631,8 +631,7 @@ util_blit_pixels_tex(struct blit_state *ctx,
                                   s0, t0, s1, t1,
                                   z);
 
-   util_draw_vertex_buffer(ctx->pipe, ctx->cso, ctx->vbuf,
-                           cso_get_aux_vertex_buffer_slot(ctx->cso),
+   util_draw_vertex_buffer(ctx->pipe, ctx->cso, ctx->vbuf, 0,
                            offset,
                            PIPE_PRIM_TRIANGLE_FAN,
                            4,  /* verts */
diff --git a/src/gallium/auxiliary/util/u_vbuf.c b/src/gallium/auxiliary/util/u_vbuf.c
index 8a680d60a6..42f37c7574 100644
--- a/src/gallium/auxiliary/util/u_vbuf.c
+++ b/src/gallium/auxiliary/util/u_vbuf.c
@@ -154,8 +154,7 @@ struct u_vbuf {
    uint32_t enabled_vb_mask;
 
    /* Saved vertex buffer. */
-   unsigned aux_vertex_buffer_slot;
-   struct pipe_vertex_buffer aux_vertex_buffer_saved;
+   struct pipe_vertex_buffer vertex_buffer0_saved;
 
    /* Vertex buffers for the driver.
     * There are usually no user buffers. */
@@ -300,13 +299,11 @@ boolean u_vbuf_get_caps(struct pipe_screen *screen, struct u_vbuf_caps *caps,
 }
 
 struct u_vbuf *
-u_vbuf_create(struct pipe_context *pipe,
-              struct u_vbuf_caps *caps, unsigned aux_vertex_buffer_index)
+u_vbuf_create(struct pipe_context *pipe, struct u_vbuf_caps *caps)
 {
    struct u_vbuf *mgr = CALLOC_STRUCT(u_vbuf);
 
    mgr->caps = *caps;
-   mgr->aux_vertex_buffer_slot = aux_vertex_buffer_index;
    mgr->pipe = pipe;
    mgr->cso_cache = cso_cache_create();
    mgr->translate_cache = translate_cache_create();
@@ -381,7 +378,7 @@ void u_vbuf_destroy(struct u_vbuf *mgr)
    for (i = 0; i < PIPE_MAX_ATTRIBS; i++)
       pipe_vertex_buffer_unreference(&mgr->real_vertex_buffer[i]);
 
-   pipe_vertex_buffer_unreference(&mgr->aux_vertex_buffer_saved);
+   pipe_vertex_buffer_unreference(&mgr->vertex_buffer0_saved);
 
    translate_cache_destroy(mgr->translate_cache);
    cso_cache_delete(mgr->cso_cache);
@@ -1313,15 +1310,14 @@ void u_vbuf_restore_vertex_elements(struct u_vbuf *mgr)
    mgr->ve_saved = NULL;
 }
 
-void u_vbuf_save_aux_vertex_buffer_slot(struct u_vbuf *mgr)
+void u_vbuf_save_vertex_buffer0(struct u_vbuf *mgr)
 {
-   pipe_vertex_buffer_reference(&mgr->aux_vertex_buffer_saved,
-                           &mgr->vertex_buffer[mgr->aux_vertex_buffer_slot]);
+   pipe_vertex_buffer_reference(&mgr->vertex_buffer0_saved,
+                                &mgr->vertex_buffer[0]);
 }
 
-void u_vbuf_restore_aux_vertex_buffer_slot(struct u_vbuf *mgr)
+void u_vbuf_restore_vertex_buffer0(struct u_vbuf *mgr)
 {
-   u_vbuf_set_vertex_buffers(mgr, mgr->aux_vertex_buffer_slot, 1,
-                             &mgr->aux_vertex_buffer_saved);
-   pipe_vertex_buffer_unreference(&mgr->aux_vertex_buffer_saved);
+   u_vbuf_set_vertex_buffers(mgr, 0, 1, &mgr->vertex_buffer0_saved);
+   pipe_vertex_buffer_unreference(&mgr->vertex_buffer0_saved);
 }
diff --git a/src/gallium/auxiliary/util/u_vbuf.h b/src/gallium/auxiliary/util/u_vbuf.h
index d070452456..a613983457 100644
--- a/src/gallium/auxiliary/util/u_vbuf.h
+++ b/src/gallium/auxiliary/util/u_vbuf.h
@@ -61,8 +61,7 @@ boolean u_vbuf_get_caps(struct pipe_screen *screen, struct u_vbuf_caps *caps,
                         unsigned flags);
 
 struct u_vbuf *
-u_vbuf_create(struct pipe_context *pipe,
-              struct u_vbuf_caps *caps, unsigned aux_vertex_buffer_index);
+u_vbuf_create(struct pipe_context *pipe, struct u_vbuf_caps *caps);
 
 void u_vbuf_destroy(struct u_vbuf *mgr);
 
@@ -77,7 +76,7 @@ void u_vbuf_draw_vbo(struct u_vbuf *mgr, const struct pipe_draw_info *info);
 /* Save/restore functionality. */
 void u_vbuf_save_vertex_elements(struct u_vbuf *mgr);
 void u_vbuf_restore_vertex_elements(struct u_vbuf *mgr);
-void u_vbuf_save_aux_vertex_buffer_slot(struct u_vbuf *mgr);
-void u_vbuf_restore_aux_vertex_buffer_slot(struct u_vbuf *mgr);
+void u_vbuf_save_vertex_buffer0(struct u_vbuf *mgr);
+void u_vbuf_restore_vertex_buffer0(struct u_vbuf *mgr);
 
 #endif
diff --git a/src/mesa/state_tracker/st_cb_bitmap.c b/src/mesa/state_tracker/st_cb_bitmap.c
index b25ae5f80e..1bfc82db43 100644
--- a/src/mesa/state_tracker/st_cb_bitmap.c
+++ b/src/mesa/state_tracker/st_cb_bitmap.c
@@ -774,10 +774,7 @@ st_DrawAtlasBitmaps(struct gl_context *ctx,
 
    u_upload_unmap(pipe->stream_uploader);
 
-   cso_set_vertex_buffers(st->cso_context,
-                          cso_get_aux_vertex_buffer_slot(st->cso_context),
-                          1, &vb);
-
+   cso_set_vertex_buffers(st->cso_context, 0, 1, &vb);
    cso_draw_arrays(st->cso_context, PIPE_PRIM_QUADS, 0, num_verts);
 
 out:
diff --git a/src/mesa/state_tracker/st_cb_drawtex.c b/src/mesa/state_tracker/st_cb_drawtex.c
index f18925ecfe..b6bf71d4cd 100644
--- a/src/mesa/state_tracker/st_cb_drawtex.c
+++ b/src/mesa/state_tracker/st_cb_drawtex.c
@@ -276,8 +276,7 @@ st_DrawTex(struct gl_context *ctx, GLfloat x, GLfloat y, GLfloat z,
       cso_set_viewport(cso, &vp);
    }
 
-   util_draw_vertex_buffer(pipe, cso, vbuffer,
-			   cso_get_aux_vertex_buffer_slot(cso),
+   util_draw_vertex_buffer(pipe, cso, vbuffer, 0,
                            offset,  /* offset */
                            PIPE_PRIM_TRIANGLE_FAN,
                            4,  /* verts */
diff --git a/src/mesa/state_tracker/st_context.c b/src/mesa/state_tracker/st_context.c
index 061b8b9c4c..50c8b2e654 100644
--- a/src/mesa/state_tracker/st_context.c
+++ b/src/mesa/state_tracker/st_context.c
@@ -395,26 +395,17 @@ st_create_context_priv(struct gl_context *ctx, struct pipe_context *pipe,
    /* Setup vertex element info for 'struct st_util_vertex'.
     */
    {
-      const unsigned slot = cso_get_aux_vertex_buffer_slot(st->cso_context);
-
-      /* If this assertion ever fails all state tracker calls to
-       * cso_get_aux_vertex_buffer_slot() should be audited.  This
-       * particular call would have to be moved to just before each
-       * drawing call.
-       */
-      assert(slot == 0);
-
       STATIC_ASSERT(sizeof(struct st_util_vertex) == 9 * sizeof(float));
 
       memset(&st->util_velems, 0, sizeof(st->util_velems));
       st->util_velems[0].src_offset = 0;
-      st->util_velems[0].vertex_buffer_index = slot;
+      st->util_velems[0].vertex_buffer_index = 0;
       st->util_velems[0].src_format = PIPE_FORMAT_R32G32B32_FLOAT;
       st->util_velems[1].src_offset = 3 * sizeof(float);
-      st->util_velems[1].vertex_buffer_index = slot;
+      st->util_velems[1].vertex_buffer_index = 0;
       st->util_velems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
       st->util_velems[2].src_offset = 7 * sizeof(float);
-      st->util_velems[2].vertex_buffer_index = slot;
+      st->util_velems[2].vertex_buffer_index = 0;
       st->util_velems[2].src_format = PIPE_FORMAT_R32G32_FLOAT;
    }
 
diff --git a/src/mesa/state_tracker/st_draw.c b/src/mesa/state_tracker/st_draw.c
index 12cae85f40..208ea735a7 100644
--- a/src/mesa/state_tracker/st_draw.c
+++ b/src/mesa/state_tracker/st_draw.c
@@ -419,15 +419,7 @@ st_draw_quad(struct st_context *st,
 
    u_upload_unmap(st->pipe->stream_uploader);
 
-   /* At the time of writing, cso_get_aux_vertex_buffer_slot() always returns
-    * zero.  If that ever changes we need to audit the calls to that function
-    * and make sure the slot number is used consistently everywhere.
-    */
-   assert(cso_get_aux_vertex_buffer_slot(st->cso_context) == 0);
-
-   cso_set_vertex_buffers(st->cso_context,
-                          cso_get_aux_vertex_buffer_slot(st->cso_context),
-                          1, &vb);
+   cso_set_vertex_buffers(st->cso_context, 0, 1, &vb);
 
    if (num_instances > 1) {
       cso_draw_arrays_instanced(st->cso_context, PIPE_PRIM_TRIANGLE_FAN, 0, 4,
diff --git a/src/mesa/state_tracker/st_pbo.c b/src/mesa/state_tracker/st_pbo.c
index 628e3ca64a..6c55e85f06 100644
--- a/src/mesa/state_tracker/st_pbo.c
+++ b/src/mesa/state_tracker/st_pbo.c
@@ -245,7 +245,7 @@ st_pbo_draw(struct st_context *st, const struct st_pbo_addresses *addr,
 
       velem.src_offset = 0;
       velem.instance_divisor = 0;
-      velem.vertex_buffer_index = cso_get_aux_vertex_buffer_slot(cso);
+      velem.vertex_buffer_index = 0;
       velem.src_format = PIPE_FORMAT_R32G32_FLOAT;
 
       cso_set_vertex_elements(cso, 1, &velem);