X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fstate_tracker%2Fst_draw_feedback.c;h=96a08b39100bf5020da695693b2fbb2421659d04;hb=0dc575c6f6157867accf749a06ec745617ea64ac;hp=c11c7696e30d1c7f9b941a06f4a281d9b3a3203b;hpb=bb1036aae5b31af583b9aa263fec73c899383493;p=mesa.git

diff --git a/src/mesa/state_tracker/st_draw_feedback.c b/src/mesa/state_tracker/st_draw_feedback.c
index c11c7696e30..96a08b39100 100644
--- a/src/mesa/state_tracker/st_draw_feedback.c
+++ b/src/mesa/state_tracker/st_draw_feedback.c
@@ -111,6 +111,7 @@ st_feedback_draw_vbo(struct gl_context *ctx,
    struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS];
    struct pipe_transfer *ib_transfer = NULL;
    GLuint attr, i;
+   const GLubyte *low_addr = NULL;
    const void *mapped_indices = NULL;
 
    assert(draw);
@@ -141,6 +142,16 @@ st_feedback_draw_vbo(struct gl_context *ctx,
    draw_bind_vertex_shader(draw, st->vp_variant->draw_shader);
    set_feedback_vertex_format(ctx);
 
+   /* Find the lowest address of the arrays we're drawing */
+   if (vp->num_inputs) {
+      low_addr = arrays[vp->index_to_input[0]]->Ptr;
+
+      for (attr = 1; attr < vp->num_inputs; attr++) {
+         const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
+         low_addr = MIN2(low_addr, start);
+      }
+   }
+
    /* loop over TGSI shader inputs to determine vertex buffer
     * and attribute info
     */
@@ -159,8 +170,8 @@ st_feedback_draw_vbo(struct gl_context *ctx,
 
          vbuffers[attr].buffer = NULL;
          pipe_resource_reference(&vbuffers[attr].buffer, stobj->buffer);
-         vbuffers[attr].buffer_offset = pointer_to_offset(arrays[0]->Ptr);
-         velements[attr].src_offset = arrays[mesaAttr]->Ptr - arrays[0]->Ptr;
+         vbuffers[attr].buffer_offset = pointer_to_offset(low_addr);
+         velements[attr].src_offset = arrays[mesaAttr]->Ptr - low_addr;
       }
       else {
          /* attribute data is in user-space memory, not a VBO */
@@ -179,7 +190,6 @@ st_feedback_draw_vbo(struct gl_context *ctx,
 
       /* common-case setup */
       vbuffers[attr].stride = arrays[mesaAttr]->StrideB; /* in bytes */
-      vbuffers[attr].max_index = max_index;
       velements[attr].instance_divisor = 0;
       velements[attr].vertex_buffer_index = attr;
       velements[attr].src_format = 
@@ -220,7 +230,7 @@ st_feedback_draw_vbo(struct gl_context *ctx,
          break;
       default:
          assert(0);
-	 return;
+	 goto out_unref_vertex;
       }
 
       if (bufobj && bufobj->Name) {
@@ -256,15 +266,6 @@ st_feedback_draw_vbo(struct gl_context *ctx,
    /*
     * unmap vertex/index buffers
     */
-   for (i = 0; i < PIPE_MAX_ATTRIBS; i++) {
-      if (draw->pt.vertex_buffer[i].buffer) {
-         pipe_buffer_unmap(pipe, vb_transfer[i]);
-         pipe_resource_reference(&draw->pt.vertex_buffer[i].buffer, NULL);
-         draw_set_mapped_vertex_buffer(draw, i, NULL);
-         pipe_resource_reference(&vbuffers[i].buffer, NULL);
-      }
-   }
-
    if (ib) {
       draw_set_mapped_index_buffer(draw, NULL);
       draw_set_index_buffer(draw, NULL);
@@ -273,6 +274,14 @@ st_feedback_draw_vbo(struct gl_context *ctx,
          pipe_buffer_unmap(pipe, ib_transfer);
       pipe_resource_reference(&ibuffer.buffer, NULL);
    }
+
+ out_unref_vertex:
+   for (attr = 0; attr < vp->num_inputs; attr++) {
+      pipe_buffer_unmap(pipe, vb_transfer[attr]);
+      draw_set_mapped_vertex_buffer(draw, attr, NULL);
+      pipe_resource_reference(&vbuffers[attr].buffer, NULL);
+   }
+   draw_set_vertex_buffers(draw, 0, NULL);
 }
 
 #endif /* FEATURE_feedback || FEATURE_rastpos */