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
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  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 viewport_index_output;
 114    unsigned edgeflag_output;
 115    unsigned clipvertex_output;
 116    unsigned clipdistance_output[PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT];
 117    unsigned culldistance_output[PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT];
 118    /* Extracted from shader:
 119     */
 120    const float (*immediates)[4];
 121
 122    /*
 123     */
 124    struct draw_vs_variant *variant[16];
 125    unsigned nr_variants;
 126    unsigned last_variant;
 127    struct draw_vs_variant *(*create_variant)( struct draw_vertex_shader *shader,
 128                                               const struct draw_vs_variant_key *key );
 129
 130
 131    void (*prepare)( struct draw_vertex_shader *shader,
 132                     struct draw_context *draw );
 133
 134    /* Run the shader - this interface will get cleaned up in the
 135     * future:
 136     */
 137    void (*run_linear)( struct draw_vertex_shader *shader,
 138                        const float (*input)[4],
 139                        float (*output)[4],
 140                        const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
 141                        const unsigned const_size[PIPE_MAX_CONSTANT_BUFFERS],
 142                        unsigned count,
 143                        unsigned input_stride,
 144                        unsigned output_stride );
 145
 146
 147    void (*delete)( struct draw_vertex_shader * );
 148 };
 149
 150
 151 struct draw_vs_variant *
 152 draw_vs_lookup_variant( struct draw_vertex_shader *base,
 153                         const struct draw_vs_variant_key *key );
 154
 155
 156 /********************************************************************************
 157  * Internal functions:
 158  */
 159
 160 struct draw_vertex_shader *
 161 draw_create_vs_exec(struct draw_context *draw,
 162                     const struct pipe_shader_state *templ);
 163
 164 struct draw_vs_variant_key;
 165 struct draw_vertex_shader;
 166
 167 #if HAVE_LLVM
 168 struct draw_vertex_shader *
 169 draw_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  */
 178 struct translate;
 179 struct translate_key;
 180
 181 struct translate *draw_vs_get_fetch( struct draw_context *draw,
 182                                      struct translate_key *key );
 183
 184
 185 struct translate *draw_vs_get_emit( struct draw_context *draw,
 186                                     struct translate_key *key );
 187
 188 struct draw_vs_variant *
 189 draw_vs_create_variant_generic( struct draw_vertex_shader *vs,
 190                                 const struct draw_vs_variant_key *key );
 191
 192
 193
 194 static 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
 199 static 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