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  1. /*
  2.  * Copyright 2008 VMware, 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.  * VMWARE 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@vmware.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. /**
  48.  * Translate has to work on one more attribute because
  49.  * the draw module has to be able to pass the vertex
  50.  * position even if the fragment shader already consumes
  51.  * PIPE_MAX_ATTRIBS inputs.
  52.  */
  53. #define TRANSLATE_MAX_ATTRIBS (PIPE_MAX_ATTRIBS + 1)
  54.  
  55. enum translate_element_type {
  56.    TRANSLATE_ELEMENT_NORMAL,
  57.    TRANSLATE_ELEMENT_INSTANCE_ID
  58. };
  59.  
  60. struct translate_element
  61. {
  62.    enum translate_element_type type;
  63.    enum pipe_format input_format;
  64.    enum pipe_format output_format;
  65.    unsigned input_buffer:8;
  66.    unsigned input_offset:24;
  67.    unsigned instance_divisor;
  68.    unsigned output_offset;
  69. };
  70.  
  71.  
  72. struct translate_key {
  73.    unsigned output_stride;
  74.    unsigned nr_elements;
  75.    struct translate_element element[TRANSLATE_MAX_ATTRIBS];
  76. };
  77.  
  78.  
  79. struct translate;
  80.  
  81.  
  82. typedef void (PIPE_CDECL *run_elts_func)(struct translate *,
  83.                                          const unsigned *elts,
  84.                                          unsigned count,
  85.                                          unsigned start_instance,
  86.                                          unsigned instance_id,
  87.                                          void *output_buffer);
  88.  
  89. typedef void (PIPE_CDECL *run_elts16_func)(struct translate *,
  90.                                            const uint16_t *elts,
  91.                                            unsigned count,
  92.                                            unsigned start_instance,
  93.                                            unsigned instance_id,
  94.                                            void *output_buffer);
  95.  
  96. typedef void (PIPE_CDECL *run_elts8_func)(struct translate *,
  97.                                           const uint8_t *elts,
  98.                                           unsigned count,
  99.                                           unsigned start_instance,
  100.                                           unsigned instance_id,
  101.                                           void *output_buffer);
  102.  
  103. typedef void (PIPE_CDECL *run_func)(struct translate *,
  104.                                     unsigned start,
  105.                                     unsigned count,
  106.                                     unsigned start_instance,
  107.                                     unsigned instance_id,
  108.                                     void *output_buffer);
  109.  
  110. struct translate {
  111.    struct translate_key key;
  112.  
  113.    void (*release)( struct translate * );
  114.  
  115.    void (*set_buffer)( struct translate *,
  116.                        unsigned i,
  117.                        const void *ptr,
  118.                        unsigned stride,
  119.                        unsigned max_index );
  120.  
  121.    run_elts_func run_elts;
  122.    run_elts16_func run_elts16;
  123.    run_elts8_func run_elts8;
  124.    run_func run;
  125. };
  126.  
  127.  
  128.  
  129. struct translate *translate_create( const struct translate_key *key );
  130.  
  131. boolean translate_is_output_format_supported(enum pipe_format format);
  132.  
  133. static INLINE int translate_keysize( const struct translate_key *key )
  134. {
  135.    return 2 * sizeof(int) + key->nr_elements * sizeof(struct translate_element);
  136. }
  137.  
  138. static INLINE int translate_key_compare( const struct translate_key *a,
  139.                                          const struct translate_key *b )
  140. {
  141.    int keysize_a = translate_keysize(a);
  142.    int keysize_b = translate_keysize(b);
  143.  
  144.    if (keysize_a != keysize_b) {
  145.       return keysize_a - keysize_b;
  146.    }
  147.    return memcmp(a, b, keysize_a);
  148. }
  149.  
  150.  
  151. static INLINE void translate_key_sanitize( struct translate_key *a )
  152. {
  153.    int keysize = translate_keysize(a);
  154.    char *ptr = (char *)a;
  155.    memset(ptr + keysize, 0, sizeof(*a) - keysize);
  156. }
  157.  
  158.  
  159. /*******************************************************************************
  160.  *  Private:
  161.  */
  162. struct translate *translate_sse2_create( const struct translate_key *key );
  163.  
  164. struct translate *translate_generic_create( const struct translate_key *key );
  165.  
  166. boolean translate_generic_is_output_format_supported(enum pipe_format format);
  167.  
  168. #endif
  169.