1/**********************************************************
2 * Copyright 2008-2009 VMware, Inc.  All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 **********************************************************/
25
26#ifndef SVGA_SAMPLER_VIEW_H
27#define SVGA_SAMPLER_VIEW_H
28
29
30#include "pipe/p_compiler.h"
31#include "pipe/p_state.h"
32#include "util/u_inlines.h"
33#include "svga_screen_cache.h"
34
35struct pipe_context;
36struct pipe_screen;
37struct svga_context;
38struct svga_pipe_sampler_view;
39struct svga_winsys_surface;
40struct svga_surface;
41enum SVGA3dSurfaceFormat;
42
43
44/**
45 * A sampler's view into a texture
46 *
47 * We currently cache one sampler view on
48 * the texture and in there by holding a reference
49 * from the texture to the sampler view.
50 *
51 * Because of this we can not hold a refernce to the
52 * texture from the sampler view. So the user
53 * of the sampler views must make sure that the
54 * texture has a reference take for as long as
55 * the sampler view is refrenced.
56 *
57 * Just unreferencing the sampler_view before the
58 * texture is enough.
59 */
60struct svga_sampler_view
61{
62   struct pipe_reference reference;
63
64   struct pipe_resource *texture;
65
66   int min_lod;
67   int max_lod;
68
69   unsigned age;
70
71   struct svga_host_surface_cache_key key;
72   struct svga_winsys_surface *handle;
73};
74
75
76
77extern struct svga_sampler_view *
78svga_get_tex_sampler_view(struct pipe_context *pipe,
79                          struct pipe_resource *pt,
80                          unsigned min_lod, unsigned max_lod);
81
82void
83svga_validate_sampler_view(struct svga_context *svga, struct svga_sampler_view *v);
84
85void
86svga_destroy_sampler_view_priv(struct svga_sampler_view *v);
87
88void
89svga_debug_describe_sampler_view(char *buf, const struct svga_sampler_view *sv);
90
91static inline void
92svga_sampler_view_reference(struct svga_sampler_view **ptr, struct svga_sampler_view *v)
93{
94   struct svga_sampler_view *old = *ptr;
95
96   if (pipe_reference_described(&(*ptr)->reference, &v->reference,
97                                (debug_reference_descriptor)svga_debug_describe_sampler_view))
98      svga_destroy_sampler_view_priv(old);
99   *ptr = v;
100}
101
102boolean
103svga_check_sampler_view_resource_collision(const struct svga_context *svga,
104                                           const struct svga_winsys_surface *res,
105                                           enum pipe_shader_type shader);
106
107boolean
108svga_check_sampler_framebuffer_resource_collision(struct svga_context *svga,
109                                                  enum pipe_shader_type shader);
110
111enum pipe_error
112svga_validate_pipe_sampler_view(struct svga_context *svga,
113                                struct svga_pipe_sampler_view *sv);
114
115#endif
116