frontend for rendering without elts

1 files changed, 251 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/draw/draw_pt_varray.c b/src/gallium/auxiliary/draw/draw_pt_varray.c
new file mode 100644
index 0000000000..022098a314
--- /dev/null
+++ b/src/gallium/auxiliary/draw/draw_pt_varray.c
@@ -0,0 +1,251 @@
+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#include "pipe/p_util.h"
+#include "draw/draw_context.h"
+#include "draw/draw_private.h"
+#include "draw/draw_pt.h"
+
+#define FETCH_MAX 256
+#define DRAW_MAX (16*FETCH_MAX)
+
+struct varray_frontend {
+   struct draw_pt_front_end base;
+   struct draw_context *draw;
+
+   ushort draw_elts[DRAW_MAX];
+   unsigned fetch_elts[FETCH_MAX];
+
+   unsigned draw_count;
+   unsigned fetch_count;
+
+   struct draw_pt_middle_end *middle;
+
+   unsigned input_prim;
+   unsigned output_prim;
+};
+
+static void varray_flush(struct varray_frontend *varray)
+{
+   if (varray->draw_count) {
+#if 0
+      debug_printf("FLUSH fc = %d, dc = %d\n",
+                   varray->fetch_count,
+                   varray->draw_count);
+#endif
+      varray->middle->run(varray->middle,
+                          varray->fetch_elts,
+                          varray->fetch_count,
+                          varray->draw_elts,
+                          varray->draw_count);
+   }
+
+   varray->fetch_count = 0;
+   varray->draw_count = 0;
+}
+
+#if 0
+static void varray_check_flush(struct varray_frontend *varray)
+{
+   if (varray->draw_count + 6 >= DRAW_MAX/* ||
+       varray->fetch_count + 4 >= FETCH_MAX*/) {
+      varray_flush(varray);
+   }
+}
+#endif
+
+static INLINE void add_draw_el(struct varray_frontend *varray,
+                               int idx, ushort flags)
+{
+   varray->draw_elts[varray->draw_count++] = idx | flags;
+}
+
+
+static INLINE void varray_triangle( struct varray_frontend *varray,
+                                    unsigned i0,
+                                    unsigned i1,
+                                    unsigned i2 )
+{
+   add_draw_el(varray, i0, 0);
+   add_draw_el(varray, i1, 0);
+   add_draw_el(varray, i2, 0);
+}
+
+static INLINE void varray_triangle_flags( struct varray_frontend *varray,
+                                          ushort flags,
+                                          unsigned i0,
+                                          unsigned i1,
+                                          unsigned i2 )
+{
+   add_draw_el(varray, i0, flags);
+   add_draw_el(varray, i1, 0);
+   add_draw_el(varray, i2, 0);
+}
+
+static INLINE void varray_line( struct varray_frontend *varray,
+                                unsigned i0,
+                                unsigned i1 )
+{
+   add_draw_el(varray, i0, 0);
+   add_draw_el(varray, i1, 0);
+}
+
+
+static INLINE void varray_line_flags( struct varray_frontend *varray,
+                                      ushort flags,
+                                      unsigned i0,
+                                      unsigned i1 )
+{
+   add_draw_el(varray, i0, flags);
+   add_draw_el(varray, i1, 0);
+}
+
+
+static INLINE void varray_point( struct varray_frontend *varray,
+                                 unsigned i0 )
+{
+   add_draw_el(varray, i0, 0);
+}
+
+static INLINE void varray_quad( struct varray_frontend *varray,
+                                unsigned i0,
+                                unsigned i1,
+                                unsigned i2,
+                                unsigned i3 )
+{
+   varray_triangle( varray, i0, i1, i3 );
+   varray_triangle( varray, i1, i2, i3 );
+}
+
+static INLINE void varray_ef_quad( struct varray_frontend *varray,
+                                   unsigned i0,
+                                   unsigned i1,
+                                   unsigned i2,
+                                   unsigned i3 )
+{
+   const unsigned omitEdge1 = DRAW_PIPE_EDGE_FLAG_0 | DRAW_PIPE_EDGE_FLAG_2;
+   const unsigned omitEdge2 = DRAW_PIPE_EDGE_FLAG_0 | DRAW_PIPE_EDGE_FLAG_1;
+
+   varray_triangle_flags( varray,
+                          DRAW_PIPE_RESET_STIPPLE | omitEdge1,
+                          i0, i1, i3 );
+
+   varray_triangle_flags( varray,
+                          omitEdge2,
+                          i1, i2, i3 );
+}
+
+/* At least for now, we're back to using a template include file for
+ * this.  The two paths aren't too different though - it may be
+ * possible to reunify them.
+ */
+#define TRIANGLE(vc,flags,i0,i1,i2) varray_triangle_flags(vc,flags,i0,i1,i2)
+#define QUAD(vc,i0,i1,i2,i3)        varray_ef_quad(vc,i0,i1,i2,i3)
+#define LINE(vc,flags,i0,i1)        varray_line_flags(vc,flags,i0,i1)
+#define POINT(vc,i0)                varray_point(vc,i0)
+#define FUNC varray_run_extras
+#include "draw_pt_varray_tmp.h"
+
+#define TRIANGLE(vc,flags,i0,i1,i2) varray_triangle(vc,i0,i1,i2)
+#define QUAD(vc,i0,i1,i2,i3)        varray_quad(vc,i0,i1,i2,i3)
+#define LINE(vc,flags,i0,i1)        varray_line(vc,i0,i1)
+#define POINT(vc,i0)                varray_point(vc,i0)
+#define FUNC varray_run
+#include "draw_pt_varray_tmp.h"
+
+
+
+static unsigned reduced_prim[PIPE_PRIM_POLYGON + 1] = {
+   PIPE_PRIM_POINTS,
+   PIPE_PRIM_LINES,
+   PIPE_PRIM_LINES,
+   PIPE_PRIM_LINES,
+   PIPE_PRIM_TRIANGLES,
+   PIPE_PRIM_TRIANGLES,
+   PIPE_PRIM_TRIANGLES,
+   PIPE_PRIM_TRIANGLES,
+   PIPE_PRIM_TRIANGLES,
+   PIPE_PRIM_TRIANGLES
+};
+
+
+
+static void varray_prepare(struct draw_pt_front_end *frontend,
+                           unsigned prim,
+                           struct draw_pt_middle_end *middle,
+                           unsigned opt)
+{
+   struct varray_frontend *varray = (struct varray_frontend *)frontend;
+   const struct pipe_rasterizer_state *rasterizer = varray->draw->rasterizer;
+
+   if (rasterizer->fill_cw != PIPE_POLYGON_MODE_FILL ||
+       rasterizer->fill_ccw != PIPE_POLYGON_MODE_FILL ||
+       rasterizer->line_stipple_enable)
+   {
+      assert(opt & PT_PIPELINE);
+      varray->base.run = varray_run_extras;
+   } else {
+      varray->base.run = varray_run;
+   }
+
+   varray->input_prim = prim;
+   varray->output_prim = reduced_prim[prim];
+
+   varray->middle = middle;
+   middle->prepare(middle, varray->output_prim, opt);
+}
+
+
+
+
+static void varray_finish(struct draw_pt_front_end *frontend)
+{
+   struct varray_frontend *varray = (struct varray_frontend *)frontend;
+   varray->middle->finish(varray->middle);
+   varray->middle = NULL;
+}
+
+static void varray_destroy(struct draw_pt_front_end *frontend)
+{
+   FREE(frontend);
+}
+
+
+struct draw_pt_front_end *draw_pt_varray(struct draw_context *draw)
+{
+   struct varray_frontend *varray = CALLOC_STRUCT(varray_frontend);
+   if (varray == NULL)
+      return NULL;
+
+   varray->base.prepare = varray_prepare;
+   varray->base.run     = NULL;
+   varray->base.finish  = varray_finish;
+   varray->base.destroy = varray_destroy;
+   varray->draw = draw;
+
+   return &varray->base;
+}