From f088b53769aacbee20135d912c33d688b6002011 Mon Sep 17 00:00:00 2001
From: Zack Rusin <zack@tungstengraphics.com>
Date: Tue, 22 Apr 2008 18:20:34 -0400
Subject: Cache translate's structs for emits and fetches.

Results in a fair speed improvement.
---
 src/gallium/auxiliary/draw/draw_pt_emit.c | 63 ++++++++++++++++++++++++++++---
 1 file changed, 57 insertions(+), 6 deletions(-)

(limited to 'src/gallium/auxiliary/draw/draw_pt_emit.c')

diff --git a/src/gallium/auxiliary/draw/draw_pt_emit.c b/src/gallium/auxiliary/draw/draw_pt_emit.c
index 490da4cca3..d35329aba0 100644
--- a/src/gallium/auxiliary/draw/draw_pt_emit.c
+++ b/src/gallium/auxiliary/draw/draw_pt_emit.c
@@ -33,13 +33,66 @@
 #include "draw/draw_pt.h"
 #include "translate/translate.h"
 
+#include "cso_cache/cso_cache.h"
+#include "cso_cache/cso_hash.h"
 
 struct pt_emit {
    struct draw_context *draw;
 
    struct translate *translate;
+
+   struct cso_hash *hash;
 };
 
+static INLINE unsigned translate_hash_key_size(struct translate_key *key)
+{
+   unsigned size = sizeof(struct translate_key) -
+                   sizeof(struct translate_element) * (PIPE_MAX_ATTRIBS - key->nr_elements);
+   return size;
+}
+
+static INLINE unsigned create_key(struct translate_key *key)
+{
+   unsigned hash_key;
+   unsigned size = translate_hash_key_size(key);
+   /*debug_printf("key size = %d, (els = %d)\n",
+     size, key->nr_elements);*/
+   hash_key = cso_construct_key(key, size);
+   return hash_key;
+}
+
+static struct translate *cached_translate(struct pt_emit *emit,
+                                          struct translate_key *key)
+{
+   unsigned hash_key = create_key(key);
+   struct cso_hash_iter iter = cso_hash_find(emit->hash, hash_key);
+   struct translate *translate = 0;
+
+   if (cso_hash_iter_is_null(iter)) {
+      translate = translate_create(key);
+      cso_hash_insert(emit->hash, hash_key, translate);
+      /*debug_printf("\tCREATED with %d\n", hash_key);*/
+   } else {
+      translate = cso_hash_iter_data(iter);
+      /*debug_printf("\tOK with %d\n", hash_key);*/
+   }
+
+   return translate;
+}
+
+
+static INLINE void delete_translates(struct pt_emit *emit)
+{
+   struct cso_hash *hash = emit->hash;
+   struct cso_hash_iter iter = cso_hash_first_node(hash);
+   while (!cso_hash_iter_is_null(iter)) {
+      struct translate *state = (struct translate*)cso_hash_iter_data(iter);
+      iter = cso_hash_iter_next(iter);
+      if (state) {
+         state->release(state);
+      }
+   }
+}
 
 void draw_pt_emit_prepare( struct pt_emit *emit,
 			   unsigned prim )
@@ -123,10 +176,7 @@ void draw_pt_emit_prepare( struct pt_emit *emit,
    if (!emit->translate ||
        memcmp(&emit->translate->key, &hw_key, sizeof(hw_key)) != 0) 
    {
-      if (emit->translate)
-	 emit->translate->release(emit->translate);
-
-      emit->translate = translate_create( &hw_key );
+      emit->translate = cached_translate(emit, &hw_key);
    }
 }
 
@@ -188,14 +238,15 @@ struct pt_emit *draw_pt_emit_create( struct draw_context *draw )
       return NULL;
 
    emit->draw = draw;
+   emit->hash = cso_hash_create();
 
    return emit;
 }
 
 void draw_pt_emit_destroy( struct pt_emit *emit )
 {
-   if (emit->translate) 
-      emit->translate->release( emit->translate );
+   delete_translates(emit);
+   cso_hash_delete(emit->hash);
 
    FREE(emit);
 }
-- 
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