1/**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
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 VMWARE 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 <keithw@vmware.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 viewport_index_output;
114   unsigned edgeflag_output;
115   unsigned clipvertex_output;
116   unsigned ccdistance_output[PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT];
117   /* Extracted from shader:
118    */
119   const float (*immediates)[4];
120
121   /*
122    */
123   struct draw_vs_variant *variant[16];
124   unsigned nr_variants;
125   unsigned last_variant;
126   struct draw_vs_variant *(*create_variant)( struct draw_vertex_shader *shader,
127                                              const struct draw_vs_variant_key *key );
128
129
130   void (*prepare)( struct draw_vertex_shader *shader,
131		    struct draw_context *draw );
132
133   /* Run the shader - this interface will get cleaned up in the
134    * future:
135    */
136   void (*run_linear)( struct draw_vertex_shader *shader,
137		       const float (*input)[4],
138		       float (*output)[4],
139                       const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
140                       const unsigned const_size[PIPE_MAX_CONSTANT_BUFFERS],
141		       unsigned count,
142		       unsigned input_stride,
143		       unsigned output_stride,
144		       const unsigned *fetch_elts);
145
146
147   void (*delete)( struct draw_vertex_shader * );
148};
149
150
151struct draw_vs_variant *
152draw_vs_lookup_variant( struct draw_vertex_shader *base,
153                        const struct draw_vs_variant_key *key );
154
155
156/********************************************************************************
157 * Internal functions:
158 */
159
160struct draw_vertex_shader *
161draw_create_vs_exec(struct draw_context *draw,
162		    const struct pipe_shader_state *templ);
163
164struct draw_vs_variant_key;
165struct draw_vertex_shader;
166
167#ifdef DRAW_LLVM_AVAILABLE
168struct draw_vertex_shader *
169draw_create_vs_llvm(struct draw_context *draw,
170		    const struct pipe_shader_state *state);
171#endif
172
173
174/********************************************************************************
175 * Helpers for vs implementations that don't do their own fetch/emit variants.
176 * Means these can be shared between shaders.
177 */
178struct translate;
179struct translate_key;
180
181struct translate *draw_vs_get_fetch( struct draw_context *draw,
182                                     struct translate_key *key );
183
184
185struct translate *draw_vs_get_emit( struct draw_context *draw,
186                                    struct translate_key *key );
187
188struct draw_vs_variant *
189draw_vs_create_variant_generic( struct draw_vertex_shader *vs,
190                                const struct draw_vs_variant_key *key );
191
192
193
194static inline int draw_vs_variant_keysize( const struct draw_vs_variant_key *key )
195{
196   return 2 * sizeof(int) + key->nr_elements * sizeof(struct draw_variant_element);
197}
198
199static inline int draw_vs_variant_key_compare( const struct draw_vs_variant_key *a,
200                                         const struct draw_vs_variant_key *b )
201{
202   int keysize = draw_vs_variant_keysize(a);
203   return memcmp(a, b, keysize);
204}
205
206
207#define MAX_TGSI_VERTICES 4
208
209
210
211#endif
212