svga_tgsi.h revision f21669e9a2f07502e3c4b0633adcfab397fb0760 
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
33
34/**
35 * We use a 32-bit mask to keep track of the generic indexes.
36 */
37#define MAX_GENERIC_VARYING 32
38
39
40struct svga_fragment_shader;
41struct svga_vertex_shader;
42struct svga_shader;
43struct tgsi_shader_info;
44struct tgsi_token;
45
46
47struct svga_vs_compile_key
48{
49   unsigned fs_generic_inputs;
50   unsigned need_prescale:1;
51   unsigned allow_psiz:1;
52};
53
54struct svga_fs_compile_key
55{
56   unsigned light_twoside:1;
57   unsigned front_ccw:1;
58   unsigned white_fragments:1;
59   unsigned num_textures:8;
60   unsigned num_unnormalized_coords:8;
61   unsigned sprite_origin_lower_left:1;
62   struct {
63      unsigned compare_mode:1;
64      unsigned compare_func:3;
65      unsigned unnormalized:1;
66      unsigned width_height_idx:7;
67      unsigned texture_target:8;
68      unsigned sprite_texgen:1;
69      unsigned swizzle_r:3;
70      unsigned swizzle_g:3;
71      unsigned swizzle_b:3;
72      unsigned swizzle_a:3;
73   } tex[PIPE_MAX_SAMPLERS];
74};
75
76struct svga_compile_key {
77   struct svga_vs_compile_key vkey;
78   struct svga_fs_compile_key fkey;
79   int8_t generic_remap_table[MAX_GENERIC_VARYING];
80};
81
82
83/**
84 * A single TGSI shader may be compiled into different variants of
85 * SVGA3D shaders depending on the compile key.  Each user shader
86 * will have a linked list of these results.
87 */
88struct svga_shader_result
89{
90   const struct svga_shader *shader;
91
92   /* Parameters used to generate this compilation result:
93    */
94   struct svga_compile_key key;
95
96   /* Compiled shader tokens:
97    */
98   const unsigned *tokens;
99   unsigned nr_tokens;
100
101   /** Per-context shader identifier used with SVGA_3D_CMD_SHADER_DEFINE,
102    * SVGA_3D_CMD_SET_SHADER and SVGA_3D_CMD_SHADER_DESTROY.
103    */
104   unsigned id;
105
106   /* Next compilation result:
107    */
108   struct svga_shader_result *next;
109};
110
111
112/* TGSI doesn't provide use with VS input semantics (they're actually
113 * pretty meaningless), so we just generate some plausible ones here.
114 * This is called both from within the TGSI translator and when
115 * building vdecls to ensure they match up.
116 *
117 * The real use of this information is matching vertex elements to
118 * fragment shader inputs in the case where vertex shader is disabled.
119 */
120static INLINE void svga_generate_vdecl_semantics( unsigned idx,
121                                                  unsigned *usage,
122                                                  unsigned *usage_index )
123{
124   if (idx == 0) {
125      *usage = SVGA3D_DECLUSAGE_POSITION;
126      *usage_index = 0;
127   }
128   else {
129      *usage = SVGA3D_DECLUSAGE_TEXCOORD;
130      *usage_index = idx - 1;
131   }
132}
133
134
135
136static INLINE unsigned svga_vs_key_size( const struct svga_vs_compile_key *key )
137{
138   return sizeof *key;
139}
140
141static INLINE unsigned svga_fs_key_size( const struct svga_fs_compile_key *key )
142{
143   return (const char *)&key->tex[key->num_textures] - (const char *)key;
144}
145
146struct svga_shader_result *
147svga_translate_fragment_program( const struct svga_fragment_shader *fs,
148                                 const struct svga_fs_compile_key *fkey );
149
150struct svga_shader_result *
151svga_translate_vertex_program( const struct svga_vertex_shader *fs,
152                               const struct svga_vs_compile_key *vkey );
153
154
155void svga_destroy_shader_result( struct svga_shader_result *result );
156
157unsigned
158svga_get_generic_inputs_mask(const struct tgsi_shader_info *info);
159
160unsigned
161svga_get_generic_outputs_mask(const struct tgsi_shader_info *info);
162
163void
164svga_remap_generics(unsigned generics_mask,
165                    int8_t remap_table[MAX_GENERIC_VARYING]);
166
167int
168svga_remap_generic_index(int8_t remap_table[MAX_GENERIC_VARYING],
169                         int generic_index);
170
171#endif
172