gallium: overhaul usage of vertex_info in draw module.

Remove all dependencies on vertex_info, except for draw_vbuf.
Drawing stages now strictly operate on post-transformed vertices and don't
know anything about hw vertices.
Use vertex program output info for two-side/flat/etc stages.
Temporarily disable vbuf module in softpipe driver.

13 files changed, 97 insertions, 162 deletions

diff --git a/src/mesa/pipe/draw/draw_clip.c b/src/mesa/pipe/draw/draw_clip.c
index c50376f11fe..e0eb656364d 100644
--- a/src/mesa/pipe/draw/draw_clip.c
+++ b/src/mesa/pipe/draw/draw_clip.c
@@ -93,7 +93,7 @@ static void interp( const struct clipper *clip,
 		    const struct vertex_header *out, 
 		    const struct vertex_header *in )
 {
-   const unsigned nr_attrs = clip->stage.draw->vertex_info.num_attribs;
+   const unsigned nr_attrs = clip->stage.draw->num_vs_outputs;
    unsigned j;
 
    /* Vertex header.
@@ -349,7 +349,7 @@ do_clip_line( struct draw_stage *stage,
 static void clip_begin( struct draw_stage *stage )
 {
    /* should always have position, at least */
-   assert(stage->draw->vertex_info.num_attribs >= 1);
+   assert(stage->draw->num_vs_outputs > 0);
 
    stage->next->begin( stage->next );
 }
diff --git a/src/mesa/pipe/draw/draw_context.c b/src/mesa/pipe/draw/draw_context.c
index 5b9ea556300..ff23288fa87 100644
--- a/src/mesa/pipe/draw/draw_context.c
+++ b/src/mesa/pipe/draw/draw_context.c
@@ -77,11 +77,6 @@ struct draw_context *draw_create( void )
 	 draw->vcache.vertex[i] = (struct vertex_header *)(tmp + i * MAX_VERTEX_SIZE);
    }
 
-   draw->attrib_front0 = 0;
-   draw->attrib_back0 = 0;
-   draw->attrib_front1 = 0;
-   draw->attrib_back1 = 0;
-
    draw->convert_wide_points = TRUE;
    draw->convert_wide_lines = TRUE;
 
@@ -242,7 +237,6 @@ draw_convert_wide_lines(struct draw_context *draw, boolean enable)
 }
 
 
-
 /**
  * Allocate space for temporary post-transform vertices, such as for clipping.
  */
diff --git a/src/mesa/pipe/draw/draw_context.h b/src/mesa/pipe/draw/draw_context.h
index cfde26ceb7b..ddeb184497a 100644
--- a/src/mesa/pipe/draw/draw_context.h
+++ b/src/mesa/pipe/draw/draw_context.h
@@ -122,7 +122,6 @@ void draw_set_mapped_constant_buffer(struct draw_context *draw,
                                      const void *buffer);
 
 
-
 /***********************************************************************
  * draw_prim.c 
  */
diff --git a/src/mesa/pipe/draw/draw_flatshade.c b/src/mesa/pipe/draw/draw_flatshade.c
index d7551e79481..46b0f7970fd 100644
--- a/src/mesa/pipe/draw/draw_flatshade.c
+++ b/src/mesa/pipe/draw/draw_flatshade.c
@@ -29,42 +29,59 @@
  */
 
 #include "pipe/p_util.h"
+#include "pipe/p_shader_tokens.h"
 #include "draw_private.h"
 
 
-static void flatshade_begin( struct draw_stage *stage )
+/** subclass of draw_stage */
+struct flat_stage
 {
-   stage->next->begin( stage->next );
-}
+   struct draw_stage stage;
+
+   uint num_color_attribs;
+   uint color_attribs[4];  /* front/back primary/secondary colors */
+};
 
 
+static INLINE struct flat_stage *
+flat_stage(struct draw_stage *stage)
+{
+   return (struct flat_stage *) stage;
+}
+
 
-static INLINE void copy_attr( unsigned attr,
-			      struct vertex_header *dst, 
-			      const struct vertex_header *src )
+static void flatshade_begin( struct draw_stage *stage )
 {
-   if (attr) {
-      memcpy( dst->data[attr],
-	      src->data[attr],
-	      sizeof(src->data[0]) );
+   struct flat_stage *flat = flat_stage(stage);
+   const struct pipe_shader_state *vs = stage->draw->vertex_shader->state;
+   uint i;
+
+   /* Find which vertex shader outputs are colors, make a list */
+   flat->num_color_attribs = 0;
+   for (i = 0; i < vs->num_outputs; i++) {
+      if (vs->output_semantic_name[i] == TGSI_SEMANTIC_COLOR ||
+          vs->output_semantic_name[i] == TGSI_SEMANTIC_BCOLOR) {
+         flat->color_attribs[flat->num_color_attribs++] = i;
+      }
    }
+
+   stage->next->begin( stage->next );
 }
 
 
+/** Copy all the color attributes from 'src' vertex to 'dst' vertex */
 static INLINE void copy_colors( struct draw_stage *stage, 
                                 struct vertex_header *dst, 
                                 const struct vertex_header *src )
 {
-   const uint num_attribs = stage->draw->vertex_info.num_attribs;
-   const enum interp_mode *interp = stage->draw->vertex_info.interp_mode;
+   const struct flat_stage *flat = flat_stage(stage);
    uint i;
 
    /* Look for constant/flat attribs and duplicate from src to dst vertex */
    /* skip attrib[0] which is vert pos */
-   for (i = 1; i < num_attribs; i++) {
-      if (interp[i] == INTERP_CONSTANT) {
-         copy_attr( i, dst, src );
-      }
+   for (i = 0; i < flat->num_color_attribs; i++) {
+      const uint attr = flat->color_attribs[i];
+      memcpy(dst->data[attr], src->data[attr], sizeof(src->data[0]));
    }
 }
 
@@ -139,21 +156,21 @@ static void flatshade_destroy( struct draw_stage *stage )
  */
 struct draw_stage *draw_flatshade_stage( struct draw_context *draw )
 {
-   struct draw_stage *flatshade = CALLOC_STRUCT(draw_stage);
+   struct flat_stage *flatshade = CALLOC_STRUCT(flat_stage);
 
-   draw_alloc_tmps( flatshade, 2 );
+   draw_alloc_tmps( &flatshade->stage, 2 );
 
-   flatshade->draw = draw;
-   flatshade->next = NULL;
-   flatshade->begin = flatshade_begin;
-   flatshade->point = flatshade_point;
-   flatshade->line = flatshade_line;
-   flatshade->tri = flatshade_tri;
-   flatshade->end = flatshade_end;
-   flatshade->reset_stipple_counter = flatshade_reset_stipple_counter;
-   flatshade->destroy = flatshade_destroy;
+   flatshade->stage.draw = draw;
+   flatshade->stage.next = NULL;
+   flatshade->stage.begin = flatshade_begin;
+   flatshade->stage.point = flatshade_point;
+   flatshade->stage.line = flatshade_line;
+   flatshade->stage.tri = flatshade_tri;
+   flatshade->stage.end = flatshade_end;
+   flatshade->stage.reset_stipple_counter = flatshade_reset_stipple_counter;
+   flatshade->stage.destroy = flatshade_destroy;
 
-   return flatshade;
+   return &flatshade->stage;
 }
 
 
diff --git a/src/mesa/pipe/draw/draw_private.h b/src/mesa/pipe/draw/draw_private.h
index a264fabfb48..685ec4a6443 100644
--- a/src/mesa/pipe/draw/draw_private.h
+++ b/src/mesa/pipe/draw/draw_private.h
@@ -44,8 +44,6 @@
 #include "pipe/p_state.h"
 #include "pipe/p_defines.h"
 
-#include "draw_vertex.h"
-
 #include "x86/rtasm/x86sse.h"
 #include "pipe/tgsi/exec/tgsi_exec.h"
 
@@ -170,6 +168,8 @@ struct draw_context
    struct pipe_vertex_element vertex_element[PIPE_ATTRIB_MAX];
    const struct draw_vertex_shader *vertex_shader;
 
+   uint num_vs_outputs;  /**< convenience, from vertex_shader */
+
    /* user-space vertex data, buffers */
    struct {
       /** vertex element/index buffer (ex: glDrawElements) */
@@ -189,12 +189,6 @@ struct draw_context
    float plane[12][4];
    unsigned nr_planes;
 
-   /** Describes the layout of post-transformation vertices */
-   struct vertex_info vertex_info;
-   /** Two-sided attributes: */
-   uint attrib_front0, attrib_back0;
-   uint attrib_front1, attrib_back1;
-
    boolean convert_wide_points; /**< convert wide points to tris? */
    boolean convert_wide_lines;  /**< convert side lines to tris? */
 
@@ -309,7 +303,9 @@ dup_vert( struct draw_stage *stage,
 	  unsigned idx )
 {   
    struct vertex_header *tmp = stage->tmp[idx];
-   memcpy(tmp, vert, stage->draw->vertex_info.size * sizeof(float) );
+   const uint vsize = sizeof(struct vertex_header)
+      + stage->draw->num_vs_outputs * 4 * sizeof(float);
+   memcpy(tmp, vert, vsize);
    tmp->vertex_id = UNDEFINED_VERTEX_ID;
    return tmp;
 }
diff --git a/src/mesa/pipe/draw/draw_stipple.c b/src/mesa/pipe/draw/draw_stipple.c
index 3e0d5689e18..2a47eb7be23 100644
--- a/src/mesa/pipe/draw/draw_stipple.c
+++ b/src/mesa/pipe/draw/draw_stipple.c
@@ -61,6 +61,7 @@ stipple_stage(struct draw_stage *stage)
 /**
  * Compute interpolated vertex attributes for 'dst' at position 't' 
  * between 'v0' and 'v1'.
+ * XXX using linear interpolation for all attribs at this time.
  */
 static void
 screen_interp( struct draw_context *draw,
@@ -70,28 +71,13 @@ screen_interp( struct draw_context *draw,
                const struct vertex_header *v1 )
 {
    uint attr;
-   for (attr = 0; attr < draw->vertex_info.num_attribs; attr++) {
-      switch (draw->vertex_info.interp_mode[attr]) {
-      case INTERP_NONE:
-      case INTERP_CONSTANT:
-         COPY_4FV(dst->data[attr], v0->data[attr]);
-         break;
-      case INTERP_PERSPECTIVE:
-         /* Fall-through */
-         /* XXX special-case perspective? */
-      case INTERP_LINEAR:
-         {
-            const float *val0 = v0->data[attr];
-            const float *val1 = v1->data[attr];
-            float *newv = dst->data[attr];
-            uint i;
-            for (i = 0; i < 4; i++) {
-               newv[i] = val0[i] + t * (val1[i] - val0[i]);
-            }
-         }
-         break;
-      default:
-         abort();
+   for (attr = 0; attr < draw->num_vs_outputs; attr++) {
+      const float *val0 = v0->data[attr];
+      const float *val1 = v1->data[attr];
+      float *newv = dst->data[attr];
+      uint i;
+      for (i = 0; i < 4; i++) {
+         newv[i] = val0[i] + t * (val1[i] - val0[i]);
       }
    }
 }
diff --git a/src/mesa/pipe/draw/draw_twoside.c b/src/mesa/pipe/draw/draw_twoside.c
index c7e268f11ed..da8e7bd90df 100644
--- a/src/mesa/pipe/draw/draw_twoside.c
+++ b/src/mesa/pipe/draw/draw_twoside.c
@@ -30,12 +30,15 @@
 
 #include "pipe/p_util.h"
 #include "pipe/p_defines.h"
+#include "pipe/p_shader_tokens.h"
 #include "draw_private.h"
 
 
 struct twoside_stage {
    struct draw_stage stage;
    float sign;         /**< +1 or -1 */
+   uint attrib_front0, attrib_back0;
+   uint attrib_front1, attrib_back1;
 };
 
 
@@ -48,6 +51,29 @@ static INLINE struct twoside_stage *twoside_stage( struct draw_stage *stage )
 static void twoside_begin( struct draw_stage *stage )
 {
    struct twoside_stage *twoside = twoside_stage(stage);
+   const struct pipe_shader_state *vs = stage->draw->vertex_shader->state;
+   uint i;
+
+   twoside->attrib_front0 = 0;
+   twoside->attrib_front1 = 0;
+   twoside->attrib_back0 = 0;
+   twoside->attrib_back1 = 0;
+
+   /* Find which vertex shader outputs are front/back colors */
+   for (i = 0; i < vs->num_outputs; i++) {
+      if (vs->output_semantic_name[i] == TGSI_SEMANTIC_COLOR) {
+         if (vs->output_semantic_index[i] == 0)
+            twoside->attrib_front0 = i;
+         else
+            twoside->attrib_front1 = i;
+      }
+      if (vs->output_semantic_name[i] == TGSI_SEMANTIC_BCOLOR) {
+         if (vs->output_semantic_index[i] == 0)
+            twoside->attrib_back0 = i;
+         else
+            twoside->attrib_back1 = i;
+      }
+   }
 
    /*
     * We'll multiply the primitive's determinant by this sign to determine
@@ -76,13 +102,12 @@ static struct vertex_header *copy_bfc( struct twoside_stage *twoside,
 				       unsigned idx )
 {   
    struct vertex_header *tmp = dup_vert( &twoside->stage, v, idx );
-   const struct draw_context *draw = twoside->stage.draw;
    
-   if (draw->attrib_front0 && draw->attrib_back0) {
-      copy_attrib(draw->attrib_front0, draw->attrib_back0, tmp);
+   if (twoside->attrib_front0 && twoside->attrib_back0) {
+      copy_attrib(twoside->attrib_front0, twoside->attrib_back0, tmp);
    }
-   if (draw->attrib_front1 && draw->attrib_back1) {
-      copy_attrib(draw->attrib_front1, draw->attrib_back1, tmp);
+   if (twoside->attrib_front1 && twoside->attrib_back1) {
+      copy_attrib(twoside->attrib_front1, twoside->attrib_back1, tmp);
    }
 
    return tmp;
diff --git a/src/mesa/pipe/draw/draw_vertex.c b/src/mesa/pipe/draw/draw_vertex.c
index 6191fcedbf9..1ab004be101 100644
--- a/src/mesa/pipe/draw/draw_vertex.c
+++ b/src/mesa/pipe/draw/draw_vertex.c
@@ -38,17 +38,6 @@
 #include "pipe/draw/draw_vertex.h"
 
 
-static INLINE void
-emit_vertex_attr(struct vertex_info *vinfo,
-                 enum attrib_format format, enum interp_mode interp)
-{
-   const uint n = vinfo->num_attribs;
-   vinfo->interp_mode[n] = interp;
-   vinfo->format[n] = format;
-   vinfo->num_attribs++;
-}
-
-
 /**
  * Compute the size of a vertex, in dwords/floats, to update the
  * vinfo->size field.
@@ -86,62 +75,3 @@ draw_compute_vertex_size(struct vertex_info *vinfo)
 
    assert(vinfo->size * 4 <= MAX_VERTEX_SIZE);
 }
-
-
-/**
- * Tell the drawing module about the contents of post-transformation vertices.
- * Note that the vertex attribute format info isn't used by 'draw'; all
- * attributes are handled as float[4].  But when the driver emits vertices
- * it'll use that info.
- * We _do_ care about the number of attributes and their interpolation modes.
- */
-void
-draw_set_vertex_info( struct draw_context *draw,
-                      const struct vertex_info *info)
-{
-   assert(info->interp_mode[0] == INTERP_LINEAR); /* should be vert pos */
-   assert(info->num_attribs <= PIPE_MAX_SHADER_OUTPUTS);
-
-   memcpy(&draw->vertex_info, info, sizeof(*info));
-
-   /* Need to know vertex size (in words) for vertex copying elsewhere.
-    * Four words per attribute, plus vertex header (uint) and clip
-    * position (float[4]).
-    */
-   draw->vertex_info.size = draw->vertex_info.num_attribs * 4 + 5;
-}
-
-
-/**
- * This function is used to tell the draw module about attributes
- * (like colors) that need to be selected based on front/back face
- * orientation.
- *
- * The logic is:
- *    if (polygon is back-facing) {
- *       vertex->attrib[front0] = vertex->attrib[back0];
- *       vertex->attrib[front1] = vertex->attrib[back1];
- *    }
- *
- * \param front0  first attrib to replace if the polygon is back-facing
- * \param back0  first attrib to copy if the polygon is back-facing
- * \param front1  second attrib to replace if the polygon is back-facing
- * \param back1  second attrib to copy if the polygon is back-facing
- *
- * Pass -1 to disable two-sided attributes.
- */
-void
-draw_set_twoside_attributes(struct draw_context *draw,
-                            uint front0, uint back0,
-                            uint front1, uint back1)
-{
-   /* XXX we could alternately pass an array of front/back attribs if there's
-    * ever need for more than two.  One could imagine a shader extension
-    * that allows arbitrary attributes to be selected based on polygon
-    * orientation...
-    */
-   draw->attrib_front0 = front0;
-   draw->attrib_back0 = back0;
-   draw->attrib_front1 = front1;
-   draw->attrib_back1 = back1;
-}
diff --git a/src/mesa/pipe/draw/draw_vertex.h b/src/mesa/pipe/draw/draw_vertex.h
index e4f85bc49f8..28abd8ab910 100644
--- a/src/mesa/pipe/draw/draw_vertex.h
+++ b/src/mesa/pipe/draw/draw_vertex.h
@@ -34,9 +34,6 @@
 #define DRAW_VERTEX_H
 
 
-struct draw_context;
-
-
 /**
  * Vertex attribute format
  */
@@ -63,7 +60,7 @@ enum interp_mode {
 
 
 /**
- * Information about post-transformed vertex layout.
+ * Information about hardware/rasterization vertex layout.
  */
 struct vertex_info
 {
@@ -71,7 +68,7 @@ struct vertex_info
    uint hwfmt[4];      /**< hardware format info for this format */
    enum interp_mode interp_mode[PIPE_MAX_SHADER_OUTPUTS];
    enum attrib_format format[PIPE_MAX_SHADER_OUTPUTS];   /**< FORMAT_x */
-   uint src_index[PIPE_MAX_SHADER_OUTPUTS];
+   uint src_index[PIPE_MAX_SHADER_OUTPUTS]; /**< map to post-xform attribs */
    uint size;          /**< total vertex size in dwords */
 };
 
@@ -98,13 +95,6 @@ draw_emit_vertex_attr(struct vertex_info *vinfo,
 }
 
 
-extern void draw_set_vertex_info( struct draw_context *draw,
-                                  const struct vertex_info *info);
-
-extern void draw_set_twoside_attributes(struct draw_context *draw,
-                                        uint front0, uint back0,
-                                        uint front1, uint back1);
-
 extern void draw_compute_vertex_size(struct vertex_info *vinfo);
 
 
diff --git a/src/mesa/pipe/draw/draw_vertex_cache.c b/src/mesa/pipe/draw/draw_vertex_cache.c
index 29993f14d2f..97a40b876ea 100644
--- a/src/mesa/pipe/draw/draw_vertex_cache.c
+++ b/src/mesa/pipe/draw/draw_vertex_cache.c
@@ -33,7 +33,6 @@
 #include "pipe/p_util.h"
 #include "draw_private.h"
 #include "draw_context.h"
-#include "draw_vertex.h"
 
 
 void draw_vertex_cache_invalidate( struct draw_context *draw )
diff --git a/src/mesa/pipe/draw/draw_vertex_fetch.c b/src/mesa/pipe/draw/draw_vertex_fetch.c
index 3ca17f8829c..4d64d3d4f28 100644
--- a/src/mesa/pipe/draw/draw_vertex_fetch.c
+++ b/src/mesa/pipe/draw/draw_vertex_fetch.c
@@ -34,7 +34,6 @@
 #include "pipe/p_shader_tokens.h"
 #include "draw_private.h"
 #include "draw_context.h"
-#include "draw_vertex.h"
 
 
 #define DRAW_DBG 0
diff --git a/src/mesa/pipe/draw/draw_vertex_shader.c b/src/mesa/pipe/draw/draw_vertex_shader.c
index c2e038453ec..5ca659dbf59 100644
--- a/src/mesa/pipe/draw/draw_vertex_shader.c
+++ b/src/mesa/pipe/draw/draw_vertex_shader.c
@@ -38,7 +38,6 @@
 #endif
 #include "draw_private.h"
 #include "draw_context.h"
-#include "draw_vertex.h"
 
 #include "x86/rtasm/x86sse.h"
 #include "pipe/llvm/gallivm.h"
@@ -176,7 +175,7 @@ run_vertex_program(struct draw_context *draw,
       /* Remaining attributes are packed into sequential post-transform
        * vertex attrib slots.
        */
-      for (slot = 1; slot < draw->vertex_info.num_attribs; slot++) {
+      for (slot = 1; slot < draw->num_vs_outputs; slot++) {
          vOut[j]->data[slot][0] = machine->Outputs[slot].xyzw[0].f[j];
          vOut[j]->data[slot][1] = machine->Outputs[slot].xyzw[1].f[j];
          vOut[j]->data[slot][2] = machine->Outputs[slot].xyzw[2].f[j];
@@ -275,6 +274,8 @@ draw_bind_vertex_shader(struct draw_context *draw,
    draw_flush(draw);
    draw->vertex_shader = dvs;
 
+   draw->num_vs_outputs = dvs->state->num_outputs;
+
    /* specify the fragment program to interpret/execute */
    tgsi_exec_machine_init(&draw->machine,
                           draw->vertex_shader->state->tokens,
diff --git a/src/mesa/pipe/draw/draw_vertex_shader_llvm.c b/src/mesa/pipe/draw/draw_vertex_shader_llvm.c
index acd61163faa..08be1b83f86 100644
--- a/src/mesa/pipe/draw/draw_vertex_shader_llvm.c
+++ b/src/mesa/pipe/draw/draw_vertex_shader_llvm.c
@@ -33,7 +33,6 @@
 #include "pipe/p_util.h"
 #include "draw_private.h"
 #include "draw_context.h"
-#include "draw_vertex.h"
 
 #ifdef MESA_LLVM
 
@@ -132,7 +131,7 @@ void draw_vertex_shader_queue_flush_llvm(struct draw_context *draw)
    gallivm_prog_exec(prog, inputs, outputs, consts,
                      draw->vs.queue_nr,
                      draw->vertex_shader->state->num_inputs,
-                     draw->vertex_info.num_attribs - 2);
+                     draw->vertex_shader->state->num_outputs);
 
 
    /* store machine results */
@@ -173,7 +172,7 @@ void draw_vertex_shader_queue_flush_llvm(struct draw_context *draw)
       /* Remaining attributes are packed into sequential post-transform
        * vertex attrib slots.
        */
-      for (slot = 1; slot < draw->vertex_info.num_attribs; slot++) {
+      for (slot = 1; slot < draw->vs_num_outputs; slot++) {
          vOut->data[slot][0] = dests[slot][0];
          vOut->data[slot][1] = dests[slot][1];
          vOut->data[slot][2] = dests[slot][2];