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  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.  
  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
  211.