redo the linear paths

[mesa.git] / src / gallium / auxiliary / draw / draw_pt.h

diff --git a/src/gallium/auxiliary/draw/draw_pt.h b/src/gallium/auxiliary/draw/draw_pt.h
index 316289969bf18cfb0e726861b5e1f57738b349b0..312fdbe4f4067bca74e2299f5575db325f44633c 100644 (file)
--- a/src/gallium/auxiliary/draw/draw_pt.h
+++ b/src/gallium/auxiliary/draw/draw_pt.h
@@ -40,14 +40,11 @@ typedef unsigned (*pt_elt_func)( const void *elts, unsigned idx );
 struct draw_pt_middle_end;
 struct draw_context;
 
-/* We use the top couple of bits in the vertex fetch index to convey a
- * little API information.  This limits the number of vertices we can
- * address to only 1 billion -- if that becomes a problem, these could
- * be moved out & passed separately.
- */
-#define DRAW_PT_EDGEFLAG      (1<<30)
-#define DRAW_PT_RESET_STIPPLE (1<<31)
-#define DRAW_PT_FLAG_MASK     (3<<30)
+
+#define PT_SHADE      0x1
+#define PT_CLIPTEST   0x2
+#define PT_PIPELINE   0x4
+#define PT_MAX_MIDDLE 0x8
 
 
 /* The "front end" - prepare sets of fetch, draw elements for the
@@ -83,11 +80,6 @@ struct draw_pt_front_end {
  * Currently two versions of this:
  *     - fetch, vertex shade, cliptest, prim-pipeline
  *     - fetch, emit (ie passthrough)
- * Later:
- *     - fetch, vertex shade, cliptest, maybe-pipeline, maybe-emit
- *     - fetch, vertex shade, emit
- *
- * Currenly only using the passthrough version.
  */
 struct draw_pt_middle_end {
    void (*prepare)( struct draw_pt_middle_end *,
@@ -100,16 +92,16 @@ struct draw_pt_middle_end {
                 const ushort *draw_elts,
                 unsigned draw_count );
 
+   void (*run_linear)(struct draw_pt_middle_end *,
+                      unsigned start,
+                      unsigned count);
+
    void (*finish)( struct draw_pt_middle_end * );
    void (*destroy)( struct draw_pt_middle_end * );
 };
 
 
 /* The "back end" - supplied by the driver, defined in draw_vbuf.h.
- *
- * Not sure whether to wrap the prim pipeline up as an alternate
- * backend.  Would be a win for everything except pure passthrough
- * mode...  
  */
 struct vbuf_render;
 struct vertex_header;
@@ -121,23 +113,32 @@ pt_elt_func draw_pt_elt_func( struct draw_context *draw );
 const void *draw_pt_elt_ptr( struct draw_context *draw,
                              unsigned start );
 
-/* Implementations:
+/* Frontends: 
+ *
+ * Currently only the general-purpose vcache implementation, could add
+ * a special case for tiny vertex buffers.
  */
 struct draw_pt_front_end *draw_pt_vcache( struct draw_context *draw );
+struct draw_pt_front_end *draw_pt_varray(struct draw_context *draw);
+
+/* Middle-ends:
+ *
+ * Currently one general-purpose case which can do all possibilities,
+ * at the slight expense of creating a vertex_header in some cases
+ * unecessarily.
+ *
+ * The special case fetch_emit code avoids pipeline vertices
+ * altogether and builds hardware vertices directly from API
+ * vertex_elements.
+ */
 struct draw_pt_middle_end *draw_pt_fetch_emit( struct draw_context *draw );
-struct draw_pt_middle_end *draw_pt_fetch_pipeline( struct draw_context *draw );
 struct draw_pt_middle_end *draw_pt_fetch_pipeline_or_emit(struct draw_context *draw);
 
 
 /* More helpers:
  */
-void draw_pt_run_pipeline( struct draw_context *draw,
-                           unsigned prim,
-                           struct vertex_header *verts,
-                           unsigned vertex_count,
-                           unsigned vertex_stride,
-                           const ushort *elts,
-                           unsigned count );
+boolean draw_pt_get_edgeflag( struct draw_context *draw,
+                              unsigned idx );
 
 
 /*******************************************************************************
@@ -155,6 +156,13 @@ void draw_pt_emit( struct pt_emit *emit,
                   const ushort *elts,
                   unsigned count );
 
+void draw_pt_emit_linear( struct pt_emit *emit,
+                          const float (*vertex_data)[4],
+                          unsigned vertex_count,
+                          unsigned stride,
+                          unsigned start,
+                          unsigned count );
+
 void draw_pt_emit_destroy( struct pt_emit *emit );
 
 struct pt_emit *draw_pt_emit_create( struct draw_context *draw );
@@ -166,7 +174,6 @@ struct pt_emit *draw_pt_emit_create( struct draw_context *draw );
 
 struct pt_fetch;
 void draw_pt_fetch_prepare( struct pt_fetch *fetch,
-                           boolean emit_header,
                            unsigned vertex_size );
 
 void draw_pt_fetch_run( struct pt_fetch *fetch,
@@ -174,6 +181,11 @@ void draw_pt_fetch_run( struct pt_fetch *fetch,
                        unsigned count,
                        char *verts );
 
+void draw_pt_fetch_run_linear( struct pt_fetch *fetch,
+                               unsigned start,
+                               unsigned count,
+                               char *verts );
+
 void draw_pt_fetch_destroy( struct pt_fetch *fetch );
 
 struct pt_fetch *draw_pt_fetch_create( struct draw_context *draw );