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  1. /*
  2.  * Copyright 2008 Tungsten Graphics, inc.
  3.  * All Rights Reserved.
  4.  *
  5.  * Permission is hereby granted, free of charge, to any person obtaining a
  6.  * copy of this software and associated documentation files (the "Software"),
  7.  * to deal in the Software without restriction, including without limitation
  8.  * on the rights to use, copy, modify, merge, publish, distribute, sub
  9.  * license, and/or sell copies of the Software, and to permit persons to whom
  10.  * the Software is furnished to do so, subject to the following conditions:
  11.  *
  12.  * The above copyright notice and this permission notice (including the next
  13.  * paragraph) shall be included in all copies or substantial portions of the
  14.  * Software.
  15.  *
  16.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17.  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18.  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19.  * TUNGSTEN GRAPHICS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20.  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21.  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22.  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  23.  */
  24.  
  25.  
  26. /**
  27.  * Vertex fetch/store/convert code.  This functionality is used in two places:
  28.  * 1. Vertex fetch/convert - to grab vertex data from incoming vertex
  29.  *    arrays and convert to format needed by vertex shaders.
  30.  * 2. Vertex store/emit - to convert simple float[][4] vertex attributes
  31.  *    (which is the organization used throughout the draw/prim pipeline) to
  32.  *    hardware-specific formats and emit into hardware vertex buffers.
  33.  *
  34.  *
  35.  * Authors:
  36.  *    Keith Whitwell <keithw@tungstengraphics.com>
  37.  */
  38.  
  39. #ifndef _TRANSLATE_H
  40. #define _TRANSLATE_H
  41.  
  42.  
  43. #include "pipe/p_compiler.h"
  44. #include "pipe/p_format.h"
  45. #include "pipe/p_state.h"
  46.  
  47. enum translate_element_type {
  48.    TRANSLATE_ELEMENT_NORMAL,
  49.    TRANSLATE_ELEMENT_INSTANCE_ID
  50. };
  51.  
  52. struct translate_element
  53. {
  54.    enum translate_element_type type;
  55.    enum pipe_format input_format;
  56.    enum pipe_format output_format;
  57.    unsigned input_buffer:8;
  58.    unsigned input_offset:24;
  59.    unsigned instance_divisor;
  60.    unsigned output_offset;
  61. };
  62.  
  63.  
  64. struct translate_key {
  65.    unsigned output_stride;
  66.    unsigned nr_elements;
  67.    struct translate_element element[PIPE_MAX_ATTRIBS + 1];
  68. };
  69.  
  70.  
  71. struct translate;
  72.  
  73.  
  74. typedef void (PIPE_CDECL *run_elts_func)(struct translate *,
  75.                                          const unsigned *elts,
  76.                                          unsigned count,
  77.                                          unsigned start_instance,
  78.                                          unsigned instance_id,
  79.                                          void *output_buffer);
  80.  
  81. typedef void (PIPE_CDECL *run_elts16_func)(struct translate *,
  82.                                            const uint16_t *elts,
  83.                                            unsigned count,
  84.                                            unsigned start_instance,
  85.                                            unsigned instance_id,
  86.                                            void *output_buffer);
  87.  
  88. typedef void (PIPE_CDECL *run_elts8_func)(struct translate *,
  89.                                           const uint8_t *elts,
  90.                                           unsigned count,
  91.                                           unsigned start_instance,
  92.                                           unsigned instance_id,
  93.                                           void *output_buffer);
  94.  
  95. typedef void (PIPE_CDECL *run_func)(struct translate *,
  96.                                     unsigned start,
  97.                                     unsigned count,
  98.                                     unsigned start_instance,
  99.                                     unsigned instance_id,
  100.                                     void *output_buffer);
  101.  
  102. struct translate {
  103.    struct translate_key key;
  104.  
  105.    void (*release)( struct translate * );
  106.  
  107.    void (*set_buffer)( struct translate *,
  108.                        unsigned i,
  109.                        const void *ptr,
  110.                        unsigned stride,
  111.                        unsigned max_index );
  112.  
  113.    run_elts_func run_elts;
  114.    run_elts16_func run_elts16;
  115.    run_elts8_func run_elts8;
  116.    run_func run;
  117. };
  118.  
  119.  
  120.  
  121. struct translate *translate_create( const struct translate_key *key );
  122.  
  123. boolean translate_is_output_format_supported(enum pipe_format format);
  124.  
  125. static INLINE int translate_keysize( const struct translate_key *key )
  126. {
  127.    return 2 * sizeof(int) + key->nr_elements * sizeof(struct translate_element);
  128. }
  129.  
  130. static INLINE int translate_key_compare( const struct translate_key *a,
  131.                                          const struct translate_key *b )
  132. {
  133.    int keysize_a = translate_keysize(a);
  134.    int keysize_b = translate_keysize(b);
  135.  
  136.    if (keysize_a != keysize_b) {
  137.       return keysize_a - keysize_b;
  138.    }
  139.    return memcmp(a, b, keysize_a);
  140. }
  141.  
  142.  
  143. static INLINE void translate_key_sanitize( struct translate_key *a )
  144. {
  145.    int keysize = translate_keysize(a);
  146.    char *ptr = (char *)a;
  147.    memset(ptr + keysize, 0, sizeof(*a) - keysize);
  148. }
  149.  
  150.  
  151. /*******************************************************************************
  152.  *  Private:
  153.  */
  154. struct translate *translate_sse2_create( const struct translate_key *key );
  155.  
  156. struct translate *translate_generic_create( const struct translate_key *key );
  157.  
  158. boolean translate_generic_is_output_format_supported(enum pipe_format format);
  159.  
  160. #endif
  161.