svga_tgsi.h revision 4a49301e 
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_TGSI_H
27#define SVGA_TGSI_H
28
29#include "pipe/p_state.h"
30
31#include "svga_hw_reg.h"
32
33struct svga_fragment_shader;
34struct svga_vertex_shader;
35struct svga_shader;
36struct tgsi_shader_info;
37struct tgsi_token;
38
39
40struct svga_vs_compile_key
41{
42   ubyte need_prescale:1;
43   ubyte allow_psiz:1;
44   unsigned zero_stride_vertex_elements;
45   ubyte num_zero_stride_vertex_elements:6;
46};
47
48struct svga_fs_compile_key
49{
50   boolean light_twoside:1;
51   boolean front_cw:1;
52   boolean white_fragments:1;
53   ubyte num_textures;
54   ubyte num_unnormalized_coords;
55   struct {
56      ubyte compare_mode       : 1;
57      ubyte compare_func       : 3;
58      ubyte unnormalized       : 1;
59
60      ubyte width_height_idx   : 7;
61
62      ubyte texture_target;
63   } tex[PIPE_MAX_SAMPLERS];
64};
65
66union svga_compile_key {
67   struct svga_vs_compile_key vkey;
68   struct svga_fs_compile_key fkey;
69};
70
71struct svga_shader_result
72{
73   const struct svga_shader *shader;
74
75   /* Parameters used to generate this compilation result:
76    */
77   union svga_compile_key key;
78
79   /* Compiled shader tokens:
80    */
81   const unsigned *tokens;
82   unsigned nr_tokens;
83
84   /* SVGA Shader ID:
85    */
86   unsigned id;
87
88   /* Next compilation result:
89    */
90   struct svga_shader_result *next;
91};
92
93
94/* TGSI doesn't provide use with VS input semantics (they're actually
95 * pretty meaningless), so we just generate some plausible ones here.
96 * This is called both from within the TGSI translator and when
97 * building vdecls to ensure they match up.
98 *
99 * The real use of this information is matching vertex elements to
100 * fragment shader inputs in the case where vertex shader is disabled.
101 */
102static INLINE void svga_generate_vdecl_semantics( unsigned idx,
103                                                  unsigned *usage,
104                                                  unsigned *usage_index )
105{
106   if (idx == 0) {
107      *usage = SVGA3D_DECLUSAGE_POSITION;
108      *usage_index = 0;
109   }
110   else {
111      *usage = SVGA3D_DECLUSAGE_TEXCOORD;
112      *usage_index = idx - 1;
113   }
114}
115
116
117
118static INLINE unsigned svga_vs_key_size( const struct svga_vs_compile_key *key )
119{
120   return sizeof *key;
121}
122
123static INLINE unsigned svga_fs_key_size( const struct svga_fs_compile_key *key )
124{
125   return (const char *)&key->tex[key->num_textures].texture_target -
126      (const char *)key;
127}
128
129struct svga_shader_result *
130svga_translate_fragment_program( const struct svga_fragment_shader *fs,
131                                 const struct svga_fs_compile_key *fkey );
132
133struct svga_shader_result *
134svga_translate_vertex_program( const struct svga_vertex_shader *fs,
135                               const struct svga_vs_compile_key *vkey );
136
137
138void svga_destroy_shader_result( struct svga_shader_result *result );
139
140#endif
141