gallium: allow setting of the internal stream output offset

D3D10 allows setting of the internal offset of a buffer, which is
in general only incremented via actual stream output writes. By
allowing setting of the internal offset draw_auto is capable
of rendering from buffers which have not been actually streamed
out to. Our interface didn't allow. This change functionally
shouldn't make any difference to OpenGL where instead of an
append_bitmask you just get a real array where -1 means append
(like in D3D) and 0 means do not append.

Signed-off-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

src/gallium/auxiliary/cso_cache/cso_context.c

@@ -332,7 +332,7 @@ void cso_release_all( struct cso_context *ctx )
       ctx->pipe->bind_vertex_elements_state( ctx->pipe, NULL );
 
       if (ctx->pipe->set_stream_output_targets)
-         ctx->pipe->set_stream_output_targets(ctx->pipe, 0, NULL, 0);
+         ctx->pipe->set_stream_output_targets(ctx->pipe, 0, NULL, NULL);
    }
 
    /* free fragment sampler views */
@@ -1241,7 +1241,7 @@ void
 cso_set_stream_outputs(struct cso_context *ctx,
                        unsigned num_targets,
                        struct pipe_stream_output_target **targets,
-                       unsigned append_bitmask)
+                       const unsigned *offsets)
 {
    struct pipe_context *pipe = ctx->pipe;
    uint i;
@@ -1266,7 +1266,7 @@ cso_set_stream_outputs(struct cso_context *ctx,
    }
 
    pipe->set_stream_output_targets(pipe, num_targets, targets,
-                                   append_bitmask);
+                                   offsets);
    ctx->nr_so_targets = num_targets;
 }
 
@@ -1292,6 +1292,7 @@ cso_restore_stream_outputs(struct cso_context *ctx)
 {
    struct pipe_context *pipe = ctx->pipe;
    uint i;
+   unsigned offset[PIPE_MAX_SO_BUFFERS];
 
    if (!ctx->has_streamout) {
       return;
@@ -1302,19 +1303,21 @@ cso_restore_stream_outputs(struct cso_context *ctx)
       return;
    }
 
+   assert(ctx->nr_so_targets_saved <= PIPE_MAX_SO_BUFFERS);
    for (i = 0; i < ctx->nr_so_targets_saved; i++) {
       pipe_so_target_reference(&ctx->so_targets[i], NULL);
       /* move the reference from one pointer to another */
       ctx->so_targets[i] = ctx->so_targets_saved[i];
       ctx->so_targets_saved[i] = NULL;
+      /* -1 means append */
+      offset[i] = (unsigned)-1;
    }
    for (; i < ctx->nr_so_targets; i++) {
       pipe_so_target_reference(&ctx->so_targets[i], NULL);
    }
 
-   /* ~0 means append */
    pipe->set_stream_output_targets(pipe, ctx->nr_so_targets_saved,
-                                   ctx->so_targets, ~0);
+                                   ctx->so_targets, offset);
 
    ctx->nr_so_targets = ctx->nr_so_targets_saved;
    ctx->nr_so_targets_saved = 0;

src/gallium/auxiliary/cso_cache/cso_context.h

@@ -115,7 +115,7 @@ 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,
-                            unsigned append_bitmask);
+                            const unsigned *offsets);
 void cso_save_stream_outputs(struct cso_context *ctx);
 void cso_restore_stream_outputs(struct cso_context *ctx);
 

src/gallium/auxiliary/draw/draw_context.h

@@ -53,14 +53,13 @@ struct tgsi_sampler;
  * structure to contain driver internal information 
  * for stream out support. mapping stores the pointer
  * to the buffer contents, and internal offset stores
- * stores an internal counter to how much of the stream
+ * an internal counter to how much of the stream
  * out buffer is used (in bytes).
  */
 struct draw_so_target {
    struct pipe_stream_output_target target;
    void *mapping;
    int internal_offset;
-   int emitted_vertices;
 };
 
 struct draw_context *draw_create( struct pipe_context *pipe );

src/gallium/auxiliary/draw/draw_pt.c

@@ -431,14 +431,16 @@ draw_pt_arrays_restart(struct draw_context *draw,
  */
 static void
 resolve_draw_info(const struct pipe_draw_info *raw_info,
-                  struct pipe_draw_info *info)
+                  struct pipe_draw_info *info,
+                  struct pipe_vertex_buffer *vertex_buffer)
 {
    memcpy(info, raw_info, sizeof(struct pipe_draw_info));
 
    if (raw_info->count_from_stream_output) {
       struct draw_so_target *target =
          (struct draw_so_target *)info->count_from_stream_output;
-      info->count = target->emitted_vertices;
+      assert(vertex_buffer != NULL);
+      info->count = target->internal_offset / vertex_buffer->stride;
 
       /* Stream output draw can not be indexed */
       debug_assert(!info->indexed);
@@ -467,7 +469,7 @@ draw_vbo(struct draw_context *draw,
     */
    util_fpstate_set_denorms_to_zero(fpstate);
 
-   resolve_draw_info(info, &resolved_info);
+   resolve_draw_info(info, &resolved_info, &(draw->pt.vertex_buffer[0]));
    info = &resolved_info;
 
    assert(info->instance_count > 0);

src/gallium/auxiliary/draw/draw_pt_so_emit.c

@@ -194,7 +194,7 @@ static void so_emit_prim(struct pt_so_emit *so,
          {
             int j;
             debug_printf("VERT[%d], offset = %d, slot[%d] sc = %d, num_c = %d, idx = %d = [",
-                         i + draw->so.targets[ob]->emitted_vertices,
+                         i,
                          draw->so.targets[ob]->internal_offset,
                          slot, start_comp, num_comps, idx);
             for (j = 0; j < num_comps; ++j) {
@@ -209,7 +209,6 @@ static void so_emit_prim(struct pt_so_emit *so,
          struct draw_so_target *target = draw->so.targets[ob];
          if (target && buffer_written[ob]) {
             target->internal_offset += state->stride[ob] * sizeof(float);
-            target->emitted_vertices += 1;
          }
       }
    }

src/gallium/auxiliary/hud/hud_context.c

@@ -454,7 +454,7 @@ hud_draw(struct hud_context *hud, struct pipe_resource *tex)
    cso_set_depth_stencil_alpha(cso, &hud->dsa);
    cso_set_rasterizer(cso, &hud->rasterizer);
    cso_set_viewport(cso, &viewport);
-   cso_set_stream_outputs(cso, 0, NULL, 0);
+   cso_set_stream_outputs(cso, 0, NULL, NULL);
    cso_set_geometry_shader_handle(cso, NULL);
    cso_set_vertex_shader_handle(cso, hud->vs);
    cso_set_vertex_elements(cso, 2, hud->velems);

src/gallium/auxiliary/postprocess/pp_run.c

@@ -136,7 +136,7 @@ pp_run(struct pp_queue_t *ppq, struct pipe_resource *in,
 
    /* set default state */
    cso_set_sample_mask(cso, ~0);
-   cso_set_stream_outputs(cso, 0, NULL, 0);
+   cso_set_stream_outputs(cso, 0, NULL, NULL);
    cso_set_geometry_shader_handle(cso, NULL);
    cso_set_render_condition(cso, NULL, FALSE, 0);
 

src/gallium/auxiliary/util/u_blit.c

@@ -537,7 +537,7 @@ util_blit_pixels_tex(struct blit_state *ctx,
    cso_set_sample_mask(ctx->cso, ~0);
    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
    cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
-   cso_set_stream_outputs(ctx->cso, 0, NULL, 0);
+   cso_set_stream_outputs(ctx->cso, 0, NULL, NULL);
 
    /* sampler */
    ctx->sampler.normalized_coords = normalized;

src/gallium/auxiliary/util/u_blitter.c

@@ -472,9 +472,12 @@ static void blitter_restore_vertex_states(struct blitter_context_priv *ctx)
 
    /* Stream outputs. */
    if (ctx->has_stream_out) {
+      unsigned offsets[PIPE_MAX_SO_BUFFERS];
+      for (i = 0; i < ctx->base.saved_num_so_targets; i++)
+         offsets[i] = (unsigned)-1;
       pipe->set_stream_output_targets(pipe,
                                       ctx->base.saved_num_so_targets,
-                                      ctx->base.saved_so_targets, ~0);
+                                      ctx->base.saved_so_targets, offsets);
 
       for (i = 0; i < ctx->base.saved_num_so_targets; i++)
          pipe_so_target_reference(&ctx->base.saved_so_targets[i], NULL);
@@ -1013,7 +1016,7 @@ static void blitter_set_common_draw_rect_state(struct blitter_context_priv *ctx,
    if (ctx->has_geometry_shader)
       pipe->bind_gs_state(pipe, NULL);
    if (ctx->has_stream_out)
-      pipe->set_stream_output_targets(pipe, 0, NULL, 0);
+      pipe->set_stream_output_targets(pipe, 0, NULL, NULL);
 }
 
 static void blitter_draw(struct blitter_context_priv *ctx,
@@ -1806,6 +1809,7 @@ void util_blitter_copy_buffer(struct blitter_context *blitter,
    struct pipe_context *pipe = ctx->base.pipe;
    struct pipe_vertex_buffer vb;
    struct pipe_stream_output_target *so_target;
+   unsigned offsets[PIPE_MAX_SO_BUFFERS] = {0};
 
    if (srcx >= src->width0 ||
        dstx >= dst->width0) {
@@ -1847,7 +1851,7 @@ void util_blitter_copy_buffer(struct blitter_context *blitter,
    pipe->bind_rasterizer_state(pipe, ctx->rs_discard_state);
 
    so_target = pipe->create_stream_output_target(pipe, dst, dstx, size);
-   pipe->set_stream_output_targets(pipe, 1, &so_target, 0);
+   pipe->set_stream_output_targets(pipe, 1, &so_target, offsets);
 
    util_draw_arrays(pipe, PIPE_PRIM_POINTS, 0, size / 4);
 
@@ -1867,6 +1871,7 @@ void util_blitter_clear_buffer(struct blitter_context *blitter,
    struct pipe_context *pipe = ctx->base.pipe;
    struct pipe_vertex_buffer vb = {0};
    struct pipe_stream_output_target *so_target;
+   unsigned offsets[PIPE_MAX_SO_BUFFERS] = {0};
 
    assert(num_channels >= 1);
    assert(num_channels <= 4);
@@ -1906,7 +1911,7 @@ void util_blitter_clear_buffer(struct blitter_context *blitter,
    pipe->bind_rasterizer_state(pipe, ctx->rs_discard_state);
 
    so_target = pipe->create_stream_output_target(pipe, dst, offset, size);
-   pipe->set_stream_output_targets(pipe, 1, &so_target, 0);
+   pipe->set_stream_output_targets(pipe, 1, &so_target, offsets);
 
    util_draw_arrays(pipe, PIPE_PRIM_POINTS, 0, size / 4);
 

src/gallium/auxiliary/util/u_gen_mipmap.c

@@ -1578,7 +1578,7 @@ util_gen_mipmap(struct gen_mipmap_state *ctx,
    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
    cso_set_sample_mask(ctx->cso, ~0);
    cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
-   cso_set_stream_outputs(ctx->cso, 0, NULL, 0);
+   cso_set_stream_outputs(ctx->cso, 0, NULL, NULL);
    cso_set_render_condition(ctx->cso, NULL, FALSE, 0);
 
    set_fragment_shader(ctx, type, is_depth);

src/gallium/docs/source/context.rst

@@ -182,10 +182,11 @@ discussed above.
   use pipe_so_target_reference instead.
 
 * ``set_stream_output_targets`` binds stream output targets. The parameter
-  append_bitmask is a bitmask, where the i-th bit specifies whether new
+  offset is an array which specifies the internal offset of the buffer. The
-  primitives should be appended to the i-th buffer (writing starts at
+  internal offset is, besides writing, used for reading the data during the
-  the internal offset), or whether writing should start at the beginning
+  draw_auto stage, i.e. it specifies how much data there is in the buffer
-  (the internal offset is effectively set to 0).
+  for the purposes of the draw_auto stage. -1 means the buffer should
+  be appended to, and everything else sets the internal offset.
 
 NOTE: The currently-bound vertex or geometry shader must be compiled with
 the properly-filled-in structure pipe_stream_output_info describing which

src/gallium/drivers/galahad/glhd_context.c

@@ -613,12 +613,12 @@ static INLINE void
 galahad_context_set_stream_output_targets(struct pipe_context *_pipe,
                                           unsigned num_targets,
                                           struct pipe_stream_output_target **tgs,
-                                          unsigned append_bitmask)
+                                          const unsigned *offsets)
 {
    struct galahad_context *glhd_pipe = galahad_context(_pipe);
    struct pipe_context *pipe = glhd_pipe->pipe;
 
-   pipe->set_stream_output_targets(pipe, num_targets, tgs, append_bitmask);
+   pipe->set_stream_output_targets(pipe, num_targets, tgs, offsets);
 }
 
 static void

src/gallium/drivers/ilo/ilo_state.c

@@ -856,10 +856,11 @@ static void
 ilo_set_stream_output_targets(struct pipe_context *pipe,
                               unsigned num_targets,
                               struct pipe_stream_output_target **targets,
-                              unsigned append_bitmask)
+                              const unsigned *offset)
 {
    struct ilo_context *ilo = ilo_context(pipe);
    unsigned i;
+   unsigned append_bitmask = 0;
 
    if (!targets)
       num_targets = 0;
@@ -868,8 +869,11 @@ ilo_set_stream_output_targets(struct pipe_context *pipe,
    if (!ilo->so.count && !num_targets)
       return;
 
-   for (i = 0; i < num_targets; i++)
+   for (i = 0; i < num_targets; i++) {
       pipe_so_target_reference(&ilo->so.states[i], targets[i]);
+      if (offset[i] == (unsigned)-1)
+         append_bitmask |= 1 << i;
+   }
 
    for (; i < ilo->so.count; i++)
       pipe_so_target_reference(&ilo->so.states[i], NULL);

src/gallium/drivers/llvmpipe/lp_state_so.c

@@ -64,17 +64,17 @@ static void
 llvmpipe_set_so_targets(struct pipe_context *pipe,
                         unsigned num_targets,
                         struct pipe_stream_output_target **targets,
-                        unsigned append_bitmask)
+                        const unsigned *offsets)
 {
    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
    int i;
    for (i = 0; i < num_targets; i++) {
+      const boolean append = (offsets[i] == (unsigned)-1);
       pipe_so_target_reference((struct pipe_stream_output_target **)&llvmpipe->so_targets[i], targets[i]);
-      /* if we're not appending then lets reset the internal
+      /* If we're not appending then lets set the internal
-         data of our so target */
+         offset to what was requested */
-      if (!(append_bitmask & (1 << i)) && llvmpipe->so_targets[i]) {
+      if (!append && llvmpipe->so_targets[i]) {
-         llvmpipe->so_targets[i]->internal_offset = 0;
+         llvmpipe->so_targets[i]->internal_offset = offsets[i];
-         llvmpipe->so_targets[i]->emitted_vertices = 0;
       }
    }
 

src/gallium/drivers/noop/noop_state.c

@@ -274,7 +274,7 @@ static void noop_stream_output_target_destroy(struct pipe_context *ctx,
 static void noop_set_stream_output_targets(struct pipe_context *ctx,
                            unsigned num_targets,
                            struct pipe_stream_output_target **targets,
-                           unsigned append_bitmask)
+                           const unsigned *offsets)
 {
 }
 

src/gallium/drivers/nouveau/nv50/nv50_state.c

@@ -1055,7 +1055,7 @@ static void
 nv50_set_stream_output_targets(struct pipe_context *pipe,
                                unsigned num_targets,
                                struct pipe_stream_output_target **targets,
-                               unsigned append_mask)
+                               const unsigned *offsets)
 {
    struct nv50_context *nv50 = nv50_context(pipe);
    unsigned i;
@@ -1066,7 +1066,8 @@ nv50_set_stream_output_targets(struct pipe_context *pipe,
 
    for (i = 0; i < num_targets; ++i) {
       const boolean changed = nv50->so_target[i] != targets[i];
-      if (!changed && (append_mask & (1 << i)))
+      const boolean append = (offsets[i] == (unsigned)-1);
+      if (!changed && append)
          continue;
       nv50->so_targets_dirty |= 1 << i;
 
@@ -1075,7 +1076,7 @@ nv50_set_stream_output_targets(struct pipe_context *pipe,
          serialize = FALSE;
       }
 
-      if (targets[i] && !(append_mask & (1 << i)))
+      if (targets[i] && !append)
          nv50_so_target(targets[i])->clean = TRUE;
 
       pipe_so_target_reference(&nv50->so_target[i], targets[i]);

src/gallium/drivers/nouveau/nvc0/nvc0_state.c

@@ -1031,7 +1031,7 @@ static void
 nvc0_set_transform_feedback_targets(struct pipe_context *pipe,
                                     unsigned num_targets,
                                     struct pipe_stream_output_target **targets,
-                                    unsigned append_mask)
+                                    unsigned *offsets)
 {
    struct nvc0_context *nvc0 = nvc0_context(pipe);
    unsigned i;
@@ -1040,14 +1040,15 @@ nvc0_set_transform_feedback_targets(struct pipe_context *pipe,
    assert(num_targets <= 4);
 
    for (i = 0; i < num_targets; ++i) {
-      if (nvc0->tfbbuf[i] == targets[i] && (append_mask & (1 << i)))
+      boolean append = (offsets[i] == ((unsigned)-1));
+      if (nvc0->tfbbuf[i] == targets[i] && append)
          continue;
       nvc0->tfbbuf_dirty |= 1 << i;
 
       if (nvc0->tfbbuf[i] && nvc0->tfbbuf[i] != targets[i])
          nvc0_so_target_save_offset(pipe, nvc0->tfbbuf[i], i, &serialize);
 
-      if (targets[i] && !(append_mask & (1 << i)))
+      if (targets[i] && !append)
          nvc0_so_target(targets[i])->clean = TRUE;
 
       pipe_so_target_reference(&nvc0->tfbbuf[i], targets[i]);

src/gallium/drivers/radeon/r600_pipe_common.h

@@ -413,7 +413,7 @@ void r600_streamout_buffers_dirty(struct r600_common_context *rctx);
 void r600_set_streamout_targets(struct pipe_context *ctx,
 				unsigned num_targets,
 				struct pipe_stream_output_target **targets,
-				unsigned append_bitmask);
+				unsigned *offset);
 void r600_emit_streamout_end(struct r600_common_context *rctx);
 void r600_streamout_init(struct r600_common_context *rctx);
 

src/gallium/drivers/radeon/r600_streamout.c

@@ -108,10 +108,11 @@ void r600_streamout_buffers_dirty(struct r600_common_context *rctx)
 void r600_set_streamout_targets(struct pipe_context *ctx,
 				unsigned num_targets,
 				struct pipe_stream_output_target **targets,
-				unsigned append_bitmask)
+				const unsigned *offsets)
 {
 	struct r600_common_context *rctx = (struct r600_common_context *)ctx;
 	unsigned i;
+        unsigned append_bitmask = 0;
 
 	/* Stop streamout. */
 	if (rctx->streamout.num_targets && rctx->streamout.begin_emitted) {
@@ -122,6 +123,8 @@ void r600_set_streamout_targets(struct pipe_context *ctx,
 	for (i = 0; i < num_targets; i++) {
 		pipe_so_target_reference((struct pipe_stream_output_target**)&rctx->streamout.targets[i], targets[i]);
 		r600_context_add_resource_size(ctx, targets[i]->buffer);
+		if (offsets[i] == ((unsigned)-1))
+			append_bitmask |=  1 << i;
 	}
 	for (; i < rctx->streamout.num_targets; i++) {
 		pipe_so_target_reference((struct pipe_stream_output_target**)&rctx->streamout.targets[i], NULL);

src/gallium/drivers/radeonsi/si_descriptors.c

@@ -605,7 +605,7 @@ void si_set_ring_buffer(struct pipe_context *ctx, uint shader, uint slot,
 static void si_set_streamout_targets(struct pipe_context *ctx,
 				     unsigned num_targets,
 				     struct pipe_stream_output_target **targets,
-				     unsigned append_bitmask)
+				     const unsigned *offsets)
 {
 	struct si_context *sctx = (struct si_context *)ctx;
 	struct si_buffer_resources *buffers = &sctx->rw_buffers[PIPE_SHADER_VERTEX];
@@ -618,7 +618,7 @@ static void si_set_streamout_targets(struct pipe_context *ctx,
 	 */
 
 	/* Set the VGT regs. */
-	r600_set_streamout_targets(ctx, num_targets, targets, append_bitmask);
+	r600_set_streamout_targets(ctx, num_targets, targets, offsets);
 
 	/* Set the shader resources.*/
 	for (i = 0; i < num_targets; i++) {

src/gallium/drivers/softpipe/sp_state_so.c

@@ -63,7 +63,7 @@ static void
 softpipe_set_so_targets(struct pipe_context *pipe,
                         unsigned num_targets,
                         struct pipe_stream_output_target **targets,
-                        unsigned append_bitmask)
+                        const unsigned *offsets)
 {
    struct softpipe_context *softpipe = softpipe_context(pipe);
    unsigned i;

src/gallium/drivers/trace/tr_context.c

@@ -1080,7 +1080,7 @@ static INLINE void
 trace_context_set_stream_output_targets(struct pipe_context *_pipe,
                                         unsigned num_targets,
                                         struct pipe_stream_output_target **tgs,
-                                        unsigned append_bitmask)
+                                        const unsigned *offsets)
 {
    struct trace_context *tr_ctx = trace_context(_pipe);
    struct pipe_context *pipe = tr_ctx->pipe;
@@ -1090,9 +1090,9 @@ trace_context_set_stream_output_targets(struct pipe_context *_pipe,
    trace_dump_arg(ptr, pipe);
    trace_dump_arg(uint, num_targets);
    trace_dump_arg_array(ptr, tgs, num_targets);
-   trace_dump_arg(uint, append_bitmask);
+   trace_dump_arg_array(uint, offsets, num_targets);
 
-   pipe->set_stream_output_targets(pipe, num_targets, tgs, append_bitmask);
+   pipe->set_stream_output_targets(pipe, num_targets, tgs, offsets);
 
    trace_dump_call_end();
 }

src/gallium/include/pipe/p_context.h

@@ -260,7 +260,7 @@ struct pipe_context {
    void (*set_stream_output_targets)(struct pipe_context *,
                               unsigned num_targets,
                               struct pipe_stream_output_target **targets,
-                              unsigned append_bitmask);
+                              const unsigned *offsets);
 
    /*@}*/
 

src/gallium/tools/trace/dump_state.py

@@ -536,9 +536,9 @@ class Context(Dispatcher):
         self._state.render_condition_condition = condition
         self._state.render_condition_mode = mode
 
-    def set_stream_output_targets(self, num_targets, tgs, append_bitmask):
+    def set_stream_output_targets(self, num_targets, tgs, offsets):
         self._state.so_targets = tgs
-        self._state.so_append_bitmask = append_bitmask
+        self._state.offsets = offsets
 
     def draw_vbo(self, info):
         self._draw_no += 1

src/mesa/state_tracker/st_cb_bitmap.c

@@ -513,7 +513,7 @@ draw_bitmap_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z,
    }
 
    cso_set_vertex_elements(cso, 3, st->velems_util_draw);
-   cso_set_stream_outputs(st->cso_context, 0, NULL, 0);
+   cso_set_stream_outputs(st->cso_context, 0, NULL, NULL);
 
    /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
    z = z * 2.0f - 1.0f;

src/mesa/state_tracker/st_cb_clear.c

@@ -307,7 +307,7 @@ clear_with_quad(struct gl_context *ctx, unsigned clear_buffers)
    }
 
    cso_set_vertex_elements(st->cso_context, 2, st->velems_util_draw);
-   cso_set_stream_outputs(st->cso_context, 0, NULL, 0);
+   cso_set_stream_outputs(st->cso_context, 0, NULL, NULL);
    cso_set_sample_mask(st->cso_context, ~0);
    cso_set_rasterizer(st->cso_context, &st->clear.raster);
 

src/mesa/state_tracker/st_cb_drawpixels.c

@@ -788,7 +788,7 @@ draw_textured_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z,
    }
 
    cso_set_vertex_elements(cso, 3, st->velems_util_draw);
-   cso_set_stream_outputs(st->cso_context, 0, NULL, 0);
+   cso_set_stream_outputs(st->cso_context, 0, NULL, NULL);
 
    /* texture state: */
    cso_set_sampler_views(cso, PIPE_SHADER_FRAGMENT, num_sampler_view, sv);

src/mesa/state_tracker/st_cb_drawtex.c

@@ -244,7 +244,7 @@ st_DrawTex(struct gl_context *ctx, GLfloat x, GLfloat y, GLfloat z,
       velements[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
    }
    cso_set_vertex_elements(cso, numAttribs, velements);
-   cso_set_stream_outputs(st->cso_context, 0, NULL, 0);
+   cso_set_stream_outputs(st->cso_context, 0, NULL, NULL);
 
    /* viewport state: viewport matching window dims */
    {

src/mesa/state_tracker/st_cb_xformfb.c

@@ -113,6 +113,7 @@ st_begin_transform_feedback(struct gl_context *ctx, GLenum mode,
    struct st_transform_feedback_object *sobj =
          st_transform_feedback_object(obj);
    unsigned i, max_num_targets;
+   unsigned offsets[PIPE_MAX_SO_BUFFERS] = {0};
 
    max_num_targets = MIN2(Elements(sobj->base.Buffers),
                           Elements(sobj->targets));
@@ -145,8 +146,8 @@ st_begin_transform_feedback(struct gl_context *ctx, GLenum mode,
    }
 
    /* Start writing at the beginning of each target. */
-   cso_set_stream_outputs(st->cso_context, sobj->num_targets, sobj->targets,
+   cso_set_stream_outputs(st->cso_context, sobj->num_targets,
-                          0);
+                          sobj->targets, offsets);
 }
 
 
@@ -155,7 +156,7 @@ st_pause_transform_feedback(struct gl_context *ctx,
                            struct gl_transform_feedback_object *obj)
 {
    struct st_context *st = st_context(ctx);
-   cso_set_stream_outputs(st->cso_context, 0, NULL, 0);
+   cso_set_stream_outputs(st->cso_context, 0, NULL, NULL);
 }
 
 
@@ -165,10 +166,15 @@ st_resume_transform_feedback(struct gl_context *ctx,
 {
    struct st_context *st = st_context(ctx);
    struct st_transform_feedback_object *sobj =
-         st_transform_feedback_object(obj);
+      st_transform_feedback_object(obj);
+   unsigned offsets[PIPE_MAX_SO_BUFFERS];
+   unsigned i;
 
-   cso_set_stream_outputs(st->cso_context, sobj->num_targets, sobj->targets,
+   for (i = 0; i < PIPE_MAX_SO_BUFFERS; i++)
-                          ~0);
+      offsets[i] = (unsigned)-1;
+
+   cso_set_stream_outputs(st->cso_context, sobj->num_targets,
+                          sobj->targets, offsets);
 }
 
 
@@ -198,7 +204,7 @@ st_end_transform_feedback(struct gl_context *ctx,
    struct st_transform_feedback_object *sobj =
          st_transform_feedback_object(obj);
 
-   cso_set_stream_outputs(st->cso_context, 0, NULL, 0);
+   cso_set_stream_outputs(st->cso_context, 0, NULL, NULL);
 
    pipe_so_target_reference(&sobj->draw_count,
                             st_transform_feedback_get_draw_target(obj));