draw: streamline the varray path

- drop support for running the pipeline (ie. don't populate the flags values)
- pass through all split-able primitives intact to the middle end
- only primitives that can't be split are shunted on the draw-element path

1 files changed, 23 insertions, 142 deletions

diff --git a/src/gallium/auxiliary/draw/draw_pt_varray_tmp_linear.h b/src/gallium/auxiliary/draw/draw_pt_varray_tmp_linear.h
index 6e2b16d9be..b6f1f0cadc 100644
--- a/src/gallium/auxiliary/draw/draw_pt_varray_tmp_linear.h
+++ b/src/gallium/auxiliary/draw/draw_pt_varray_tmp_linear.h
@@ -1,3 +1,7 @@
+static unsigned trim( unsigned count, unsigned first, unsigned incr )
+{
+   return count - (count - first) % incr; 
+}
 
 static void FUNC(struct draw_pt_front_end *frontend,
                  pt_elt_func get_elt,
@@ -5,12 +9,9 @@ static void FUNC(struct draw_pt_front_end *frontend,
                  unsigned count)
 {
    struct varray_frontend *varray = (struct varray_frontend *)frontend;
-   struct draw_context *draw = varray->draw;
    unsigned start = (unsigned)elts;
 
-   boolean flatfirst = (draw->rasterizer->flatshade &&
-                        draw->rasterizer->flatshade_first);
-   unsigned i, j, flags;
+   unsigned i, j;
    unsigned first, incr;
 
    varray->fetch_start = start;
@@ -27,26 +28,30 @@ static void FUNC(struct draw_pt_front_end *frontend,
    case PIPE_PRIM_POINTS:
    case PIPE_PRIM_LINES:
    case PIPE_PRIM_TRIANGLES:
-      j = 0;
-      while (j + first <= count) {
-         unsigned end = MIN2(FETCH_MAX, count - j);
-         end -= (end % incr);
-         varray_flush_linear(varray, start + j, end);
-         j += end;
+   case PIPE_PRIM_LINE_STRIP:
+   case PIPE_PRIM_TRIANGLE_STRIP:
+   case PIPE_PRIM_QUADS:
+   case PIPE_PRIM_QUAD_STRIP:
+      
+      for (j = 0; j < count;) {
+         unsigned remaining = count - j;
+         unsigned nr = trim( MIN2(FETCH_MAX, remaining), first, incr );
+         varray_flush_linear(varray, start + j, nr);
+         j += nr;
+         if (nr != remaining) 
+            j -= (first - incr);
       }
       break;
 
    case PIPE_PRIM_LINE_LOOP:
       if (count >= 2) {
-         flags = DRAW_PIPE_RESET_STIPPLE;
-
          for (j = 0; j + first <= count; j += i) {
             unsigned end = MIN2(FETCH_MAX, count - j);
             end -= (end % incr);
-            for (i = 1; i < end; i++, flags = 0) {
-               LINE(varray, flags, i - 1, i);
+            for (i = 1; i < end; i++) {
+               LINE(varray, i - 1, i);
             }
-            LINE(varray, flags, i - 1, 0);
+            LINE(varray, i - 1, 0);
             i = end;
             fetch_init(varray, end);
             varray_flush(varray);
@@ -54,145 +59,21 @@ static void FUNC(struct draw_pt_front_end *frontend,
       }
       break;
 
-   case PIPE_PRIM_LINE_STRIP:
-      flags = DRAW_PIPE_RESET_STIPPLE;
-      for (j = 0; j + first <= count; j += i) {
-         unsigned end = MIN2(FETCH_MAX, count - j);
-         end -= (end % incr);
-         for (i = 1; i < end; i++, flags = 0) {
-            LINE(varray, flags, i - 1, i);
-         }
-         i = end;
-         fetch_init(varray, end);
-         varray_flush(varray);
-      }
-      break;
-
-   case PIPE_PRIM_TRIANGLE_STRIP:
-      if (flatfirst) {
-         for (j = 0; j + first <= count; j += i) {
-            unsigned end = MIN2(FETCH_MAX, count - j);
-            end -= (end % incr);
-            for (i = 0; i+2 < end; i++) {
-               TRIANGLE(varray, DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL,
-                        i + 0, i + 1 + (i&1), i + 2 - (i&1));
-            }
-            i = end;
-            fetch_init(varray, end);
-            varray_flush(varray);
-            if (j + first + i <= count) {
-               varray->fetch_start -= 2;
-               i -= 2;
-            }
-         }
-      }
-      else {
-         for (j = 0; j + first <= count; j += i) {
-            unsigned end = MIN2(FETCH_MAX, count - j);
-            end -= (end % incr);
-            for (i = 0; i+2 < end; i++) {
-               TRIANGLE(varray, DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL,
-                        i + 0 + (i&1), i + 1 - (i&1), i + 2);
-            }
-            i = end;
-            fetch_init(varray, end);
-            varray_flush(varray);
-            if (j + first + i <= count) {
-               varray->fetch_start -= 2;
-               i -= 2;
-            }
-         }
-      }
-      break;
 
+   case PIPE_PRIM_POLYGON:
    case PIPE_PRIM_TRIANGLE_FAN:
-      if (count >= 3) {
-         if (flatfirst) {
-            flags = DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL;
-            for (j = 0; j + first <= count; j += i) {
-               unsigned end = MIN2(FETCH_MAX, count - j);
-               end -= (end % incr);
-               for (i = 0; i+2 < end; i++) {
-                  TRIANGLE(varray, flags, i + 1, i + 2, 0);
-               }
-               i = end;
-               fetch_init(varray, end);
-               varray_flush(varray);
-            }
-         }
-         else {
-            flags = DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL;
-            for (j = 0; j + first <= count; j += i) {
-               unsigned end = MIN2(FETCH_MAX, count - j);
-               end -= (end % incr);
-               for (i = 0; i+2 < end; i++) {
-                  TRIANGLE(varray, flags, 0, i + 1, i + 2);
-               }
-               i = end;
-               fetch_init(varray, end);
-               varray_flush(varray);
-            }
-         }
-      }
-      break;
-
-   case PIPE_PRIM_QUADS:
-      for (j = 0; j + first <= count; j += i) {
-         unsigned end = MIN2(FETCH_MAX, count - j);
-         end -= (end % incr);
-         for (i = 0; i+3 < end; i += 4) {
-            QUAD(varray, i + 0, i + 1, i + 2, i + 3);
-         }
-         i = end;
-         fetch_init(varray, end);
-         varray_flush(varray);
-      }
-      break;
-
-   case PIPE_PRIM_QUAD_STRIP:
       for (j = 0; j + first <= count; j += i) {
          unsigned end = MIN2(FETCH_MAX, count - j);
          end -= (end % incr);
-         for (i = 0; i+3 < end; i += 2) {
-            QUAD(varray, i + 2, i + 0, i + 1, i + 3);
+         for (i = 2; i < end; i++) {
+            TRIANGLE(varray, 0, i - 1, i);
          }
          i = end;
          fetch_init(varray, end);
          varray_flush(varray);
-         if (j + first + i <= count) {
-            varray->fetch_start -= 2;
-            i -= 2;
-         }
       }
       break;
 
-   case PIPE_PRIM_POLYGON:
-   {
-      /* These bitflags look a little odd because we submit the
-       * vertices as (1,2,0) to satisfy flatshade requirements.
-       */
-      const unsigned edge_first  = DRAW_PIPE_EDGE_FLAG_2;
-      const unsigned edge_middle = DRAW_PIPE_EDGE_FLAG_0;
-      const unsigned edge_last   = DRAW_PIPE_EDGE_FLAG_1;
-
-      flags = DRAW_PIPE_RESET_STIPPLE | edge_first | edge_middle;
-      for (j = 0; j + first <= count; j += i) {
-         unsigned end = MIN2(FETCH_MAX, count - j);
-         end -= (end % incr);
-         for (i = 0; i+2 < end; i++, flags = edge_middle) {
-
-            if (i + 3 == count)
-               flags |= edge_last;
-
-            TRIANGLE(varray, flags, i + 1, i + 2, 0);
-         }
-         i = end;
-         fetch_init(varray, end);
-         varray_flush(varray);
-      }
-   }
-   break;
-
    default:
       assert(0);
       break;