draw: create specialized vs varients incorporating fetch & emit

1 files changed, 105 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/draw/draw_vs.h b/src/gallium/auxiliary/draw/draw_vs.h
index f9772b83b8..677be0d28d 100644
--- a/src/gallium/auxiliary/draw/draw_vs.h
+++ b/src/gallium/auxiliary/draw/draw_vs.h
@@ -38,10 +38,63 @@
 struct draw_context;
 struct pipe_shader_state;
 
+struct draw_vs_input 
+{
+   enum pipe_format format;
+   unsigned buffer;
+   unsigned offset; 
+};
+
+struct draw_vs_output
+{
+   enum pipe_format format;
+   unsigned offset;
+};
+
+struct draw_vs_element {
+   struct draw_vs_input in;
+   struct draw_vs_output out;
+};
+
+struct draw_vs_varient_key {
+   unsigned output_stride;
+   unsigned nr_elements;
+   struct draw_vs_element element[PIPE_MAX_ATTRIBS];
+};
+
+struct draw_vs_varient {
+   struct draw_vs_varient_key key;
+
+   struct draw_vertex_shader *vs;
+
+   void (*set_input)( struct draw_vs_varient *,
+                      unsigned i,
+                      const void *ptr,
+                      unsigned stride );
+
+   void (*set_constants)( struct draw_vs_varient *,
+                          const float (*constants)[4] );
+
+
+   void (*run_linear)( struct draw_vs_varient *shader,
+                       unsigned start,
+		       unsigned count,
+		       void *output_buffer );
+
+   void (*run_elts)( struct draw_vs_varient *shader,
+                     const unsigned *elts,
+                     unsigned count,
+                     void *output_buffer );
+
+   void (*destroy)( struct draw_vs_varient * );
+};
+
+
 /**
  * Private version of the compiled vertex_shader
  */
 struct draw_vertex_shader {
+   struct draw_context *draw;
 
    /* This member will disappear shortly:
     */
@@ -49,6 +102,14 @@ struct draw_vertex_shader {
 
    struct tgsi_shader_info info;
 
+   /* 
+    */
+   struct draw_vs_varient *varient[16];
+   unsigned nr_varients;
+   struct draw_vs_varient *(*create_varient)( struct draw_vertex_shader *shader,
+                                              const struct draw_vs_varient_key *key );
+
+
    void (*prepare)( struct draw_vertex_shader *shader,
 		    struct draw_context *draw );
 
@@ -68,6 +129,15 @@ struct draw_vertex_shader {
 };
 
 
+struct draw_vs_varient *
+draw_vs_lookup_varient( struct draw_vertex_shader *base,
+                        const struct draw_vs_varient_key *key );
+
+
+/********************************************************************************
+ * Internal functions:
+ */
+
 struct draw_vertex_shader *
 draw_create_vs_exec(struct draw_context *draw,
 		    const struct pipe_shader_state *templ);
@@ -80,8 +150,43 @@ struct draw_vertex_shader *
 draw_create_vs_llvm(struct draw_context *draw,
 		    const struct pipe_shader_state *templ);
 
+/********************************************************************************
+ * Helpers for vs implementations that don't do their own fetch/emit varients.
+ * Means these can be shared between shaders.
+ */
+struct translate;
+struct translate_key;
+
+struct translate *draw_vs_get_fetch( struct draw_context *draw,
+                                     struct translate_key *key );
+
+
+struct translate *draw_vs_get_emit( struct draw_context *draw,
+                                    struct translate_key *key );
+
+struct draw_vs_varient *draw_vs_varient_generic( struct draw_vertex_shader *vs,
+                                                 const struct draw_vs_varient_key *key );
+
+
+
+static INLINE int draw_vs_varient_keysize( const struct draw_vs_varient_key *key )
+{
+   return 2 * sizeof(int) + key->nr_elements * sizeof(struct draw_vs_element);
+}
+
+static INLINE int draw_vs_varient_key_compare( const struct draw_vs_varient_key *a,
+                                         const struct draw_vs_varient_key *b )
+{
+   int keysize = draw_vs_varient_keysize(a);
+   return memcmp(a, b, keysize);
+}
+
+
+
+
 
 #define MAX_TGSI_VERTICES 4
    
 
+
 #endif