summaryrefslogtreecommitdiff
path: root/src/gallium/auxiliary/gallivm/lp_bld_sample.h
blob: 92f3c57435a137a368d72dc457f99a99e2e5b4ef (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
/**************************************************************************
 *
 * Copyright 2009 VMware, Inc.
 * 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 VMWARE 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.
 *
 **************************************************************************/

/**
 * @file
 * Texture sampling.
 *
 * @author Jose Fonseca <jfonseca@vmware.com>
 */

#ifndef LP_BLD_SAMPLE_H
#define LP_BLD_SAMPLE_H


#include "gallivm/lp_bld.h"

struct pipe_texture;
struct pipe_sampler_state;
struct util_format_description;
struct lp_type;
struct lp_build_context;


/**
 * Sampler static state.
 *
 * These are the bits of state from pipe_texture and pipe_sampler_state that
 * are embedded in the generated code.
 */
struct lp_sampler_static_state
{
   /* pipe_texture's state */
   enum pipe_format format;
   unsigned target:2;
   unsigned pot_width:1;
   unsigned pot_height:1;
   unsigned pot_depth:1;

   /* pipe_sampler_state's state */
   unsigned wrap_s:3;
   unsigned wrap_t:3;
   unsigned wrap_r:3;
   unsigned min_img_filter:2;
   unsigned min_mip_filter:2;
   unsigned mag_img_filter:2;
   unsigned compare_mode:1;
   unsigned compare_func:3;
   unsigned normalized_coords:1;
   float lod_bias, min_lod, max_lod;
   float border_color[4];
};


/**
 * Sampler dynamic state.
 *
 * These are the bits of state from pipe_texture and pipe_sampler_state that
 * are computed in runtime.
 *
 * There are obtained through callbacks, as we don't want to tie the texture
 * sampling code generation logic to any particular texture layout or pipe
 * driver.
 */
struct lp_sampler_dynamic_state
{

   /** Obtain the base texture width. */
   LLVMValueRef
   (*width)( struct lp_sampler_dynamic_state *state,
             LLVMBuilderRef builder,
             unsigned unit);

   /** Obtain the base texture height. */
   LLVMValueRef
   (*height)( struct lp_sampler_dynamic_state *state,
              LLVMBuilderRef builder,
              unsigned unit);

   /** Obtain the base texture depth. */
   LLVMValueRef
   (*depth)( struct lp_sampler_dynamic_state *state,
             LLVMBuilderRef builder,
             unsigned unit);

   /** Obtain the number of mipmap levels (minus one). */
   LLVMValueRef
   (*last_level)( struct lp_sampler_dynamic_state *state,
                  LLVMBuilderRef builder,
                  unsigned unit);

   LLVMValueRef
   (*row_stride)( struct lp_sampler_dynamic_state *state,
                  LLVMBuilderRef builder,
                  unsigned unit);

   LLVMValueRef
   (*data_ptr)( struct lp_sampler_dynamic_state *state,
                LLVMBuilderRef builder,
                unsigned unit);

};


/**
 * Derive the sampler static state.
 */
void
lp_sampler_static_state(struct lp_sampler_static_state *state,
                        const struct pipe_texture *texture,
                        const struct pipe_sampler_state *sampler);


LLVMValueRef
lp_build_gather(LLVMBuilderRef builder,
                unsigned length,
                unsigned src_width,
                unsigned dst_width,
                LLVMValueRef base_ptr,
                LLVMValueRef offsets);


LLVMValueRef
lp_build_sample_offset(struct lp_build_context *bld,
                       const struct util_format_description *format_desc,
                       LLVMValueRef x,
                       LLVMValueRef y,
                       LLVMValueRef z,
                       LLVMValueRef y_stride,
                       LLVMValueRef z_stride);


void
lp_build_sample_soa(LLVMBuilderRef builder,
                    const struct lp_sampler_static_state *static_state,
                    struct lp_sampler_dynamic_state *dynamic_state,
                    struct lp_type fp_type,
                    unsigned unit,
                    unsigned num_coords,
                    const LLVMValueRef *coords,
                    LLVMValueRef lodbias,
                    LLVMValueRef *texel);



#endif /* LP_BLD_SAMPLE_H */