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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