--- /dev/null
-
- /** XXX move these */
- #define MAX_WIDTH 2048
- #define MAX_HEIGHT 2048
-
-
+/**************************************************************************
+ *
+ * Copyright 2007 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.
+ *
+ **************************************************************************/
+
+#ifndef SP_TEX_TILE_CACHE_H
+#define SP_TEX_TILE_CACHE_H
+
+
+#include "pipe/p_compiler.h"
+
+
+struct softpipe_context;
+struct softpipe_tex_tile_cache;
+
+
+/**
+ * Cache tile size (width and height). This needs to be a power of two.
+ */
+#define TILE_SIZE 64
+
+
+/* If we need to support > 4096, just expand this to be a 64 bit
+ * union, or consider tiling in Z as well.
+ */
+union tex_tile_address {
+ struct {
+ unsigned x:6; /* 4096 / TILE_SIZE */
+ unsigned y:6; /* 4096 / TILE_SIZE */
+ unsigned z:12; /* 4096 -- z not tiled */
+ unsigned face:3;
+ unsigned level:4;
+ unsigned invalid:1;
+ } bits;
+ unsigned value;
+};
+
+
+struct softpipe_tex_cached_tile
+{
+ union tex_tile_address addr;
+ union {
+ float color[TILE_SIZE][TILE_SIZE][4];
+ } data;
+};
+
+#define NUM_ENTRIES 50
+
+struct softpipe_tex_tile_cache
+{
+ struct pipe_screen *screen;
+ struct pipe_transfer *transfer;
+ void *transfer_map;
+
+ struct pipe_texture *texture; /**< if caching a texture */
+ unsigned timestamp;
+
+ struct softpipe_tex_cached_tile entries[NUM_ENTRIES];
+
+ struct pipe_transfer *tex_trans;
+ void *tex_trans_map;
+ int tex_face, tex_level, tex_z;
+
+ struct softpipe_tex_cached_tile *last_tile; /**< most recently retrieved tile */
+};
+
+
+extern struct softpipe_tex_tile_cache *
+sp_create_tex_tile_cache( struct pipe_screen *screen );
+
+extern void
+sp_destroy_tex_tile_cache(struct softpipe_tex_tile_cache *tc);
+
+
+extern void
+sp_tex_tile_cache_map_transfers(struct softpipe_tex_tile_cache *tc);
+
+extern void
+sp_tex_tile_cache_unmap_transfers(struct softpipe_tex_tile_cache *tc);
+
+extern void
+sp_tex_tile_cache_set_texture(struct softpipe_tex_tile_cache *tc,
+ struct pipe_texture *texture);
+
+void
+sp_tex_tile_cache_validate_texture(struct softpipe_tex_tile_cache *tc);
+
+extern void
+sp_flush_tex_tile_cache(struct softpipe_tex_tile_cache *tc);
+
+
+
+extern const struct softpipe_tex_cached_tile *
+sp_find_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
+ union tex_tile_address addr );
+
+static INLINE const union tex_tile_address
+tex_tile_address( unsigned x,
+ unsigned y,
+ unsigned z,
+ unsigned face,
+ unsigned level )
+{
+ union tex_tile_address addr;
+
+ addr.value = 0;
+ addr.bits.x = x / TILE_SIZE;
+ addr.bits.y = y / TILE_SIZE;
+ addr.bits.z = z;
+ addr.bits.face = face;
+ addr.bits.level = level;
+
+ return addr;
+}
+
+/* Quickly retrieve tile if it matches last lookup.
+ */
+static INLINE const struct softpipe_tex_cached_tile *
+sp_get_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
+ union tex_tile_address addr )
+{
+ if (tc->last_tile->addr.value == addr.value)
+ return tc->last_tile;
+
+ return sp_find_cached_tile_tex( tc, addr );
+}
+
+
+
+
+
+#endif /* SP_TEX_TILE_CACHE_H */
+