draw_vs.h revision 1865f341d8f45b389061fc08d2da90b7aa8a6099 
1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28/* Authors:  Keith Whitwell <keith@tungstengraphics.com>
29 */
30
31#ifndef DRAW_VS_H
32#define DRAW_VS_H
33
34#include "draw_context.h"
35#include "draw_private.h"
36#include "draw_vertex.h"
37
38
39struct draw_context;
40struct pipe_shader_state;
41
42struct draw_variant_input
43{
44   enum pipe_format format;
45   unsigned buffer;
46   unsigned offset;
47   unsigned instance_divisor;
48};
49
50struct draw_variant_output
51{
52   enum attrib_emit format;     /* output format */
53   unsigned vs_output:8;        /* which vertex shader output is this? */
54   unsigned offset:24;          /* offset into output vertex */
55};
56
57struct draw_variant_element {
58   struct draw_variant_input in;
59   struct draw_variant_output out;
60};
61
62struct draw_vs_variant_key {
63   unsigned output_stride;
64   unsigned nr_elements:8;      /* max2(nr_inputs, nr_outputs) */
65   unsigned nr_inputs:8;
66   unsigned nr_outputs:8;
67   unsigned viewport:1;
68   unsigned clip:1;
69   unsigned const_vbuffers:5;
70   struct draw_variant_element element[PIPE_MAX_ATTRIBS];
71};
72
73struct draw_vs_variant;
74
75
76struct draw_vs_variant {
77   struct draw_vs_variant_key key;
78
79   struct draw_vertex_shader *vs;
80
81   void (*set_buffer)( struct draw_vs_variant *,
82                      unsigned i,
83                      const void *ptr,
84                      unsigned stride,
85                      unsigned max_stride );
86
87   void (PIPE_CDECL *run_linear)( struct draw_vs_variant *shader,
88                                  unsigned start,
89                                  unsigned count,
90                                  void *output_buffer );
91
92   void (PIPE_CDECL *run_elts)( struct draw_vs_variant *shader,
93                                const unsigned *elts,
94                                unsigned count,
95                                void *output_buffer );
96
97   void (*destroy)( struct draw_vs_variant * );
98};
99
100
101/**
102 * Private version of the compiled vertex_shader
103 */
104struct draw_vertex_shader {
105   struct draw_context *draw;
106
107   /* This member will disappear shortly:
108    */
109   struct pipe_shader_state   state;
110
111   struct tgsi_shader_info info;
112   unsigned position_output;
113   unsigned edgeflag_output;
114   unsigned clipvertex_output;
115   unsigned clipdistance_output[2];
116   /* Extracted from shader:
117    */
118   const float (*immediates)[4];
119
120   /*
121    */
122   struct draw_vs_variant *variant[16];
123   unsigned nr_variants;
124   unsigned last_variant;
125   struct draw_vs_variant *(*create_variant)( struct draw_vertex_shader *shader,
126                                              const struct draw_vs_variant_key *key );
127
128
129   void (*prepare)( struct draw_vertex_shader *shader,
130		    struct draw_context *draw );
131
132   /* Run the shader - this interface will get cleaned up in the
133    * future:
134    */
135   void (*run_linear)( struct draw_vertex_shader *shader,
136		       const float (*input)[4],
137		       float (*output)[4],
138                       const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
139                       const unsigned const_size[PIPE_MAX_CONSTANT_BUFFERS],
140		       unsigned count,
141		       unsigned input_stride,
142		       unsigned output_stride );
143
144
145   void (*delete)( struct draw_vertex_shader * );
146};
147
148
149struct draw_vs_variant *
150draw_vs_lookup_variant( struct draw_vertex_shader *base,
151                        const struct draw_vs_variant_key *key );
152
153
154/********************************************************************************
155 * Internal functions:
156 */
157
158struct draw_vertex_shader *
159draw_create_vs_exec(struct draw_context *draw,
160		    const struct pipe_shader_state *templ);
161
162struct draw_vertex_shader *
163draw_create_vs_ppc(struct draw_context *draw,
164		   const struct pipe_shader_state *templ);
165
166
167struct draw_vs_variant_key;
168struct draw_vertex_shader;
169
170#if HAVE_LLVM
171struct draw_vertex_shader *
172draw_create_vs_llvm(struct draw_context *draw,
173		    const struct pipe_shader_state *state);
174#endif
175
176
177/********************************************************************************
178 * Helpers for vs implementations that don't do their own fetch/emit variants.
179 * Means these can be shared between shaders.
180 */
181struct translate;
182struct translate_key;
183
184struct translate *draw_vs_get_fetch( struct draw_context *draw,
185                                     struct translate_key *key );
186
187
188struct translate *draw_vs_get_emit( struct draw_context *draw,
189                                    struct translate_key *key );
190
191struct draw_vs_variant *
192draw_vs_create_variant_generic( struct draw_vertex_shader *vs,
193                                const struct draw_vs_variant_key *key );
194
195
196
197static INLINE int draw_vs_variant_keysize( const struct draw_vs_variant_key *key )
198{
199   return 2 * sizeof(int) + key->nr_elements * sizeof(struct draw_variant_element);
200}
201
202static INLINE int draw_vs_variant_key_compare( const struct draw_vs_variant_key *a,
203                                         const struct draw_vs_variant_key *b )
204{
205   int keysize = draw_vs_variant_keysize(a);
206   return memcmp(a, b, keysize);
207}
208
209
210#define MAX_TGSI_VERTICES 4
211
212
213
214#endif
215