1 /**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 /* Authors: Keith Whitwell <[email protected]>
29 */
30
31 #ifndef DRAW_VS_H
32 #define DRAW_VS_H
33
34 #include "draw_context.h"
35 #include "draw_private.h"
36 #include "draw_vertex.h"
37
38 #include "tgsi/tgsi_scan.h"
39
40
41 struct draw_context;
42 struct pipe_shader_state;
43
44 struct draw_variant_input {
45 enum pipe_format format;
46 unsigned buffer;
47 unsigned offset;
48 unsigned instance_divisor;
49 };
50
51 struct draw_variant_output {
52 enum attrib_emit format; /* output format */
53 unsigned vs_output:8; /* which vertex shader output is this? */
54 unsigned offset:24; /* offset into output vertex */
55 };
56
57 struct draw_variant_element {
58 struct draw_variant_input in;
59 struct draw_variant_output out;
60 };
61
62 struct draw_vs_variant_key {
63 unsigned output_stride;
64 unsigned nr_elements:8; /* max2(nr_inputs, nr_outputs) */
65 unsigned nr_inputs:8;
66 unsigned nr_outputs:8;
67 unsigned viewport:1;
68 unsigned clip:1;
69 unsigned const_vbuffers:5;
70 struct draw_variant_element element[PIPE_MAX_ATTRIBS];
71 };
72
73 struct draw_vs_variant {
74 struct draw_vs_variant_key key;
75
76 struct draw_vertex_shader *vs;
77
78 void (*set_buffer)(struct draw_vs_variant *,
79 unsigned i,
80 const void *ptr,
81 unsigned stride,
82 unsigned max_stride);
83
84 void (UTIL_CDECL *run_linear)(struct draw_vs_variant *shader,
85 unsigned start,
86 unsigned count,
87 void *output_buffer);
88
89 void (UTIL_CDECL *run_elts)(struct draw_vs_variant *shader,
90 const unsigned *elts,
91 unsigned count,
92 void *output_buffer);
93
94 void (*destroy)(struct draw_vs_variant *);
95 };
96
97
98 /**
99 * Private version of the compiled vertex_shader
100 */
101 struct draw_vertex_shader {
102 struct draw_context *draw;
103
104 /* This member will disappear shortly:
105 */
106 struct pipe_shader_state state;
107
108 struct tgsi_shader_info info;
109 unsigned position_output;
110 unsigned viewport_index_output;
111 unsigned edgeflag_output;
112 unsigned clipvertex_output;
113 unsigned ccdistance_output[PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT];
114 /* Extracted from shader:
115 */
116 const float (*immediates)[4];
117
118 struct draw_vs_variant *variant[16];
119 unsigned nr_variants;
120 unsigned last_variant;
121 struct draw_vs_variant *(*create_variant)(struct draw_vertex_shader *shader,
122 const struct draw_vs_variant_key *key);
123
124
125 void (*prepare)(struct draw_vertex_shader *shader,
126 struct draw_context *draw);
127
128 /* Run the shader - this interface will get cleaned up in the
129 * future:
130 */
131 void (*run_linear)(struct draw_vertex_shader *shader,
132 const float (*input)[4],
133 float (*output)[4],
134 const struct draw_buffer_info *constants,
135 unsigned count,
136 unsigned input_stride,
137 unsigned output_stride,
138 const unsigned *fetch_elts);
139
140 void (*delete)(struct draw_vertex_shader *);
141 };
142
143
144 struct draw_vs_variant *
145 draw_vs_lookup_variant(struct draw_vertex_shader *base,
146 const struct draw_vs_variant_key *key);
147
148
149 /********************************************************************************
150 * Internal functions:
151 */
152
153 struct draw_vertex_shader *
154 draw_create_vs_exec(struct draw_context *draw,
155 const struct pipe_shader_state *templ);
156
157 #if DRAW_LLVM_AVAILABLE
158 struct draw_vertex_shader *
159 draw_create_vs_llvm(struct draw_context *draw,
160 const struct pipe_shader_state *state);
161 #endif
162
163
164 /********************************************************************************
165 * Helpers for vs implementations that don't do their own fetch/emit variants.
166 * Means these can be shared between shaders.
167 */
168 struct translate;
169 struct translate_key;
170
171 struct translate *
172 draw_vs_get_fetch(struct draw_context *draw,
173 struct translate_key *key);
174
175 struct translate *
176 draw_vs_get_emit(struct draw_context *draw,
177 struct translate_key *key);
178
179 struct draw_vs_variant *
180 draw_vs_create_variant_generic(struct draw_vertex_shader *vs,
181 const struct draw_vs_variant_key *key);
182
183
184 static inline int
draw_vs_variant_keysize(const struct draw_vs_variant_key * key)185 draw_vs_variant_keysize(const struct draw_vs_variant_key *key)
186 {
187 return 2 * sizeof(int) + key->nr_elements * sizeof(struct draw_variant_element);
188 }
189
190
191 static inline int
draw_vs_variant_key_compare(const struct draw_vs_variant_key * a,const struct draw_vs_variant_key * b)192 draw_vs_variant_key_compare(const struct draw_vs_variant_key *a,
193 const struct draw_vs_variant_key *b)
194 {
195 int keysize = draw_vs_variant_keysize(a);
196 return memcmp(a, b, keysize);
197 }
198
199
200 #define MAX_TGSI_VERTICES 4
201
202
203 #endif
204