svga_tgsi.h revision 848b8605 
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   unsigned adjust_attrib_range:16;
53   unsigned adjust_attrib_w_1:16;
54};
55
56struct svga_fs_compile_key
57{
58   unsigned light_twoside:1;
59   unsigned front_ccw:1;
60   unsigned white_fragments:1;
61   unsigned write_color0_to_n_cbufs:3;
62   unsigned num_textures:8;
63   unsigned num_unnormalized_coords:8;
64   unsigned sprite_origin_lower_left:1;
65   struct {
66      unsigned compare_mode:1;
67      unsigned compare_func:3;
68      unsigned unnormalized:1;
69      unsigned width_height_idx:7;
70      unsigned texture_target:8;
71      unsigned sprite_texgen:1;
72      unsigned swizzle_r:3;
73      unsigned swizzle_g:3;
74      unsigned swizzle_b:3;
75      unsigned swizzle_a:3;
76   } tex[PIPE_MAX_SAMPLERS];
77};
78
79/**
80 * Key/index for identifying shader variants.
81 */
82struct svga_compile_key {
83   struct svga_vs_compile_key vkey;
84   struct svga_fs_compile_key fkey;
85   int8_t generic_remap_table[MAX_GENERIC_VARYING];
86};
87
88
89/**
90 * A single TGSI shader may be compiled into different variants of
91 * SVGA3D shaders depending on the compile key.  Each user shader
92 * will have a linked list of these variants.
93 */
94struct svga_shader_variant
95{
96   const struct svga_shader *shader;
97
98   /** Parameters used to generate this variant */
99   struct svga_compile_key key;
100
101   /* Compiled shader tokens:
102    */
103   const unsigned *tokens;
104   unsigned nr_tokens;
105
106   /** Per-context shader identifier used with SVGA_3D_CMD_SHADER_DEFINE,
107    * SVGA_3D_CMD_SET_SHADER and SVGA_3D_CMD_SHADER_DESTROY.
108    */
109   unsigned id;
110
111   /* GB object buffer containing the bytecode */
112   struct svga_winsys_gb_shader *gb_shader;
113
114   /** Next variant */
115   struct svga_shader_variant *next;
116};
117
118
119/* TGSI doesn't provide use with VS input semantics (they're actually
120 * pretty meaningless), so we just generate some plausible ones here.
121 * This is called both from within the TGSI translator and when
122 * building vdecls to ensure they match up.
123 *
124 * The real use of this information is matching vertex elements to
125 * fragment shader inputs in the case where vertex shader is disabled.
126 */
127static INLINE void svga_generate_vdecl_semantics( unsigned idx,
128                                                  unsigned *usage,
129                                                  unsigned *usage_index )
130{
131   if (idx == 0) {
132      *usage = SVGA3D_DECLUSAGE_POSITION;
133      *usage_index = 0;
134   }
135   else {
136      *usage = SVGA3D_DECLUSAGE_TEXCOORD;
137      *usage_index = idx - 1;
138   }
139}
140
141
142
143static INLINE unsigned svga_vs_key_size( const struct svga_vs_compile_key *key )
144{
145   return sizeof *key;
146}
147
148static INLINE unsigned svga_fs_key_size( const struct svga_fs_compile_key *key )
149{
150   return (const char *)&key->tex[key->num_textures] - (const char *)key;
151}
152
153struct svga_shader_variant *
154svga_translate_fragment_program( const struct svga_fragment_shader *fs,
155                                 const struct svga_fs_compile_key *fkey );
156
157struct svga_shader_variant *
158svga_translate_vertex_program( const struct svga_vertex_shader *fs,
159                               const struct svga_vs_compile_key *vkey );
160
161
162unsigned
163svga_get_generic_inputs_mask(const struct tgsi_shader_info *info);
164
165unsigned
166svga_get_generic_outputs_mask(const struct tgsi_shader_info *info);
167
168void
169svga_remap_generics(unsigned generics_mask,
170                    int8_t remap_table[MAX_GENERIC_VARYING]);
171
172int
173svga_remap_generic_index(int8_t remap_table[MAX_GENERIC_VARYING],
174                         int generic_index);
175
176#endif
177