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 <keithw@vmware.com>
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
39 struct draw_context;
40 struct pipe_shader_state;
41
42 struct draw_variant_input
43 {
44 enum pipe_format format;
45 unsigned buffer;
46 unsigned offset;
47 unsigned instance_divisor;
48 };
49
50 struct draw_variant_output
51 {
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
75
76 struct draw_vs_variant {
77 struct draw_vs_variant_key key;
78
79 struct draw_vertex_shader *vs;
80
81 void (*set_buffer)( struct draw_vs_variant *,
82 unsigned i,
83 const void *ptr,
84 unsigned stride,
85 unsigned max_stride );
86
87 void (PIPE_CDECL *run_linear)( struct draw_vs_variant *shader,
88 unsigned start,
89 unsigned count,
90 void *output_buffer );
91
92 void (PIPE_CDECL *run_elts)( struct draw_vs_variant *shader,
93 const unsigned *elts,
94 unsigned count,
95 void *output_buffer );
96
97 void (*destroy)( struct draw_vs_variant * );
98 };
99
100
101 /**
102 * Private version of the compiled vertex_shader
103 */
104 struct draw_vertex_shader {
105 struct draw_context *draw;
106
107 /* This member will disappear shortly:
108 */
109 struct pipe_shader_state state;
110
111 struct tgsi_shader_info info;
112 unsigned position_output;
113 unsigned viewport_index_output;
114 unsigned edgeflag_output;
115 unsigned clipvertex_output;
116 unsigned ccdistance_output[PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT];
117 /* Extracted from shader:
118 */
119 const float (*immediates)[4];
120
121 /*
122 */
123 struct draw_vs_variant *variant[16];
124 unsigned nr_variants;
125 unsigned last_variant;
126 struct draw_vs_variant *(*create_variant)( struct draw_vertex_shader *shader,
127 const struct draw_vs_variant_key *key );
128
129
130 void (*prepare)( struct draw_vertex_shader *shader,
131 struct draw_context *draw );
132
133 /* Run the shader - this interface will get cleaned up in the
134 * future:
135 */
136 void (*run_linear)( struct draw_vertex_shader *shader,
137 const float (*input)[4],
138 float (*output)[4],
139 const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
140 const unsigned const_size[PIPE_MAX_CONSTANT_BUFFERS],
141 unsigned count,
142 unsigned input_stride,
143 unsigned output_stride,
144 const unsigned *fetch_elts);
145
146
147 void (*delete)( struct draw_vertex_shader * );
148 };
149
150
151 struct draw_vs_variant *
152 draw_vs_lookup_variant( struct draw_vertex_shader *base,
153 const struct draw_vs_variant_key *key );
154
155
156 /********************************************************************************
157 * Internal functions:
158 */
159
160 struct draw_vertex_shader *
161 draw_create_vs_exec(struct draw_context *draw,
162 const struct pipe_shader_state *templ);
163
164 struct draw_vs_variant_key;
165 struct draw_vertex_shader;
166
167 #ifdef LLVM_AVAILABLE
168 struct draw_vertex_shader *
169 draw_create_vs_llvm(struct draw_context *draw,
170 const struct pipe_shader_state *state);
171 #endif
172
173
174 /********************************************************************************
175 * Helpers for vs implementations that don't do their own fetch/emit variants.
176 * Means these can be shared between shaders.
177 */
178 struct translate;
179 struct translate_key;
180
181 struct translate *draw_vs_get_fetch( struct draw_context *draw,
182 struct translate_key *key );
183
184
185 struct translate *draw_vs_get_emit( struct draw_context *draw,
186 struct translate_key *key );
187
188 struct draw_vs_variant *
189 draw_vs_create_variant_generic( struct draw_vertex_shader *vs,
190 const struct draw_vs_variant_key *key );
191
192
193
draw_vs_variant_keysize(const struct draw_vs_variant_key * key)194 static inline int draw_vs_variant_keysize( const struct draw_vs_variant_key *key )
195 {
196 return 2 * sizeof(int) + key->nr_elements * sizeof(struct draw_variant_element);
197 }
198
draw_vs_variant_key_compare(const struct draw_vs_variant_key * a,const struct draw_vs_variant_key * b)199 static inline int draw_vs_variant_key_compare( const struct draw_vs_variant_key *a,
200 const struct draw_vs_variant_key *b )
201 {
202 int keysize = draw_vs_variant_keysize(a);
203 return memcmp(a, b, keysize);
204 }
205
206
207 #define MAX_TGSI_VERTICES 4
208
209
210
211 #endif
212