src/gallium/auxiliary/draw/draw_vs.h

   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
  39 struct draw_context;
  40 struct pipe_shader_state;
  41
  42 struct draw_variant_input
  43 {
  44    enum pipe_format format;
  45    unsigned buffer;
  46    unsigned offset;
  47    unsigned instance_divisor;
  48 };
  49
  50 struct 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
  57 struct draw_variant_element {
  58    struct draw_variant_input in;
  59    struct draw_variant_output out;
  60 };
  61
  62 struct 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
  73 struct draw_vs_variant;
  74
  75
  76 struct 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  */
 104 struct 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[PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT];
 116    unsigned culldistance_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
 145
 146    void (*delete)( struct draw_vertex_shader * );
 147 };
 148
 149
 150 struct draw_vs_variant *
 151 draw_vs_lookup_variant( struct draw_vertex_shader *base,
 152                         const struct draw_vs_variant_key *key );
 153
 154
 155 /********************************************************************************
 156  * Internal functions:
 157  */
 158
 159 struct draw_vertex_shader *
 160 draw_create_vs_exec(struct draw_context *draw,
 161                     const struct pipe_shader_state *templ);
 162
 163 struct draw_vs_variant_key;
 164 struct draw_vertex_shader;
 165
 166 #if HAVE_LLVM
 167 struct draw_vertex_shader *
 168 draw_create_vs_llvm(struct draw_context *draw,
 169                     const struct pipe_shader_state *state);
 170 #endif
 171
 172
 173 /********************************************************************************
 174  * Helpers for vs implementations that don't do their own fetch/emit variants.
 175  * Means these can be shared between shaders.
 176  */
 177 struct translate;
 178 struct translate_key;
 179
 180 struct translate *draw_vs_get_fetch( struct draw_context *draw,
 181                                      struct translate_key *key );
 182
 183
 184 struct translate *draw_vs_get_emit( struct draw_context *draw,
 185                                     struct translate_key *key );
 186
 187 struct draw_vs_variant *
 188 draw_vs_create_variant_generic( struct draw_vertex_shader *vs,
 189                                 const struct draw_vs_variant_key *key );
 190
 191
 192
 193 static INLINE int draw_vs_variant_keysize( const struct draw_vs_variant_key *key )
 194 {
 195    return 2 * sizeof(int) + key->nr_elements * sizeof(struct draw_variant_element);
 196 }
 197
 198 static INLINE int draw_vs_variant_key_compare( const struct draw_vs_variant_key *a,
 199                                          const struct draw_vs_variant_key *b )
 200 {
 201    int keysize = draw_vs_variant_keysize(a);
 202    return memcmp(a, b, keysize);
 203 }
 204
 205
 206 #define MAX_TGSI_VERTICES 4
 207
 208
 209
 210 #endif