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
35 struct pipe_context;
36 struct pipe_screen;
37 struct svga_context;
38 struct svga_pipe_sampler_view;
39 struct svga_winsys_surface;
40 struct svga_surface;
41 enum 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 */
60 struct 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
77 extern struct svga_sampler_view *
78 svga_get_tex_sampler_view(struct pipe_context *pipe,
79 struct pipe_resource *pt,
80 unsigned min_lod, unsigned max_lod);
81
82 void
83 svga_validate_sampler_view(struct svga_context *svga, struct svga_sampler_view *v);
84
85 void
86 svga_destroy_sampler_view_priv(struct svga_sampler_view *v);
87
88 void
89 svga_debug_describe_sampler_view(char *buf, const struct svga_sampler_view *sv);
90
91 static inline void
svga_sampler_view_reference(struct svga_sampler_view ** ptr,struct svga_sampler_view * v)92 svga_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
102 boolean
103 svga_check_sampler_view_resource_collision(const struct svga_context *svga,
104 const struct svga_winsys_surface *res,
105 enum pipe_shader_type shader);
106
107 boolean
108 svga_check_sampler_framebuffer_resource_collision(struct svga_context *svga,
109 enum pipe_shader_type shader);
110
111 enum pipe_error
112 svga_validate_pipe_sampler_view(struct svga_context *svga,
113 struct svga_pipe_sampler_view *sv);
114
115 #endif
116