svga_tgsi.h revision cdc920a0 
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   unsigned zero_stride_vertex_elements;
43   unsigned need_prescale:1;
44   unsigned allow_psiz:1;
45   unsigned num_zero_stride_vertex_elements:6;
46};
47
48struct svga_fs_compile_key
49{
50   unsigned light_twoside:1;
51   unsigned front_cw:1;
52   unsigned white_fragments:1;
53   unsigned num_textures:8;
54   unsigned num_unnormalized_coords:8;
55   struct {
56      unsigned compare_mode:1;
57      unsigned compare_func:3;
58      unsigned unnormalized:1;
59      unsigned width_height_idx:7;
60      unsigned texture_target:8;
61   } tex[PIPE_MAX_SAMPLERS];
62};
63
64union svga_compile_key {
65   struct svga_vs_compile_key vkey;
66   struct svga_fs_compile_key fkey;
67};
68
69struct svga_shader_result
70{
71   const struct svga_shader *shader;
72
73   /* Parameters used to generate this compilation result:
74    */
75   union svga_compile_key key;
76
77   /* Compiled shader tokens:
78    */
79   const unsigned *tokens;
80   unsigned nr_tokens;
81
82   /* SVGA Shader ID:
83    */
84   unsigned id;
85
86   /* Next compilation result:
87    */
88   struct svga_shader_result *next;
89};
90
91
92/* TGSI doesn't provide use with VS input semantics (they're actually
93 * pretty meaningless), so we just generate some plausible ones here.
94 * This is called both from within the TGSI translator and when
95 * building vdecls to ensure they match up.
96 *
97 * The real use of this information is matching vertex elements to
98 * fragment shader inputs in the case where vertex shader is disabled.
99 */
100static INLINE void svga_generate_vdecl_semantics( unsigned idx,
101                                                  unsigned *usage,
102                                                  unsigned *usage_index )
103{
104   if (idx == 0) {
105      *usage = SVGA3D_DECLUSAGE_POSITION;
106      *usage_index = 0;
107   }
108   else {
109      *usage = SVGA3D_DECLUSAGE_TEXCOORD;
110      *usage_index = idx - 1;
111   }
112}
113
114
115
116static INLINE unsigned svga_vs_key_size( const struct svga_vs_compile_key *key )
117{
118   return sizeof *key;
119}
120
121static INLINE unsigned svga_fs_key_size( const struct svga_fs_compile_key *key )
122{
123   return (const char *)&key->tex[key->num_textures] - (const char *)key;
124}
125
126struct svga_shader_result *
127svga_translate_fragment_program( const struct svga_fragment_shader *fs,
128                                 const struct svga_fs_compile_key *fkey );
129
130struct svga_shader_result *
131svga_translate_vertex_program( const struct svga_vertex_shader *fs,
132                               const struct svga_vs_compile_key *vkey );
133
134
135void svga_destroy_shader_result( struct svga_shader_result *result );
136
137#endif
138