draw_vs.h revision 4eb3225b38ce12cb34ab3d90804c9683bd7b4ed3 
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
115   /* Extracted from shader:
116    */
117   const float (*immediates)[4];
118
119   /*
120    */
121   struct draw_vs_variant *variant[16];
122   unsigned nr_variants;
123   unsigned last_variant;
124   struct draw_vs_variant *(*create_variant)( struct draw_vertex_shader *shader,
125                                              const struct draw_vs_variant_key *key );
126
127
128   void (*prepare)( struct draw_vertex_shader *shader,
129		    struct draw_context *draw );
130
131   /* Run the shader - this interface will get cleaned up in the
132    * future:
133    */
134   void (*run_linear)( struct draw_vertex_shader *shader,
135		       const float (*input)[4],
136		       float (*output)[4],
137                       const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
138                       const unsigned const_size[PIPE_MAX_CONSTANT_BUFFERS],
139		       unsigned count,
140		       unsigned input_stride,
141		       unsigned output_stride );
142
143
144   void (*delete)( struct draw_vertex_shader * );
145};
146
147
148struct draw_vs_variant *
149draw_vs_lookup_variant( struct draw_vertex_shader *base,
150                        const struct draw_vs_variant_key *key );
151
152
153/********************************************************************************
154 * Internal functions:
155 */
156
157struct draw_vertex_shader *
158draw_create_vs_exec(struct draw_context *draw,
159		    const struct pipe_shader_state *templ);
160
161struct draw_vertex_shader *
162draw_create_vs_ppc(struct draw_context *draw,
163		   const struct pipe_shader_state *templ);
164
165
166struct draw_vs_variant_key;
167struct draw_vertex_shader;
168
169#if HAVE_LLVM
170struct draw_vertex_shader *
171draw_create_vs_llvm(struct draw_context *draw,
172		    const struct pipe_shader_state *state);
173#endif
174
175
176/********************************************************************************
177 * Helpers for vs implementations that don't do their own fetch/emit variants.
178 * Means these can be shared between shaders.
179 */
180struct translate;
181struct translate_key;
182
183struct translate *draw_vs_get_fetch( struct draw_context *draw,
184                                     struct translate_key *key );
185
186
187struct translate *draw_vs_get_emit( struct draw_context *draw,
188                                    struct translate_key *key );
189
190struct draw_vs_variant *
191draw_vs_create_variant_generic( struct draw_vertex_shader *vs,
192                                const struct draw_vs_variant_key *key );
193
194
195
196static INLINE int draw_vs_variant_keysize( const struct draw_vs_variant_key *key )
197{
198   return 2 * sizeof(int) + key->nr_elements * sizeof(struct draw_variant_element);
199}
200
201static INLINE int draw_vs_variant_key_compare( const struct draw_vs_variant_key *a,
202                                         const struct draw_vs_variant_key *b )
203{
204   int keysize = draw_vs_variant_keysize(a);
205   return memcmp(a, b, keysize);
206}
207
208
209#define MAX_TGSI_VERTICES 4
210
211
212
213#endif
214