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
40 struct svga_fragment_shader;
41 struct svga_vertex_shader;
42 struct svga_shader;
43 struct tgsi_shader_info;
44 struct tgsi_token;
45
46
47 struct svga_vs_compile_key
48 {
49 unsigned fs_generic_inputs;
50 unsigned need_prescale:1;
51 unsigned allow_psiz:1;
52 };
53
54 struct 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
76 struct 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 */
88 struct 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 */
svga_generate_vdecl_semantics(unsigned idx,unsigned * usage,unsigned * usage_index)120 static 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
svga_vs_key_size(const struct svga_vs_compile_key * key)136 static INLINE unsigned svga_vs_key_size( const struct svga_vs_compile_key *key )
137 {
138 return sizeof *key;
139 }
140
svga_fs_key_size(const struct svga_fs_compile_key * key)141 static 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
146 struct svga_shader_result *
147 svga_translate_fragment_program( const struct svga_fragment_shader *fs,
148 const struct svga_fs_compile_key *fkey );
149
150 struct svga_shader_result *
151 svga_translate_vertex_program( const struct svga_vertex_shader *fs,
152 const struct svga_vs_compile_key *vkey );
153
154
155 void svga_destroy_shader_result( struct svga_shader_result *result );
156
157 unsigned
158 svga_get_generic_inputs_mask(const struct tgsi_shader_info *info);
159
160 unsigned
161 svga_get_generic_outputs_mask(const struct tgsi_shader_info *info);
162
163 void
164 svga_remap_generics(unsigned generics_mask,
165 int8_t remap_table[MAX_GENERIC_VARYING]);
166
167 int
168 svga_remap_generic_index(int8_t remap_table[MAX_GENERIC_VARYING],
169 int generic_index);
170
171 #endif
172