src/gallium/auxiliary/translate/translate.h

   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    struct translate_key key;
  73
  74    void (*release)( struct translate * );
  75
  76    void (*set_buffer)( struct translate *,
  77                        unsigned i,
  78                        const void *ptr,
  79                        unsigned stride );
  80
  81    void (PIPE_CDECL *run_elts)( struct translate *,
  82                                 const unsigned *elts,
  83                                 unsigned count,
  84                                 unsigned instance_id,
  85                                 void *output_buffer);
  86
  87    void (PIPE_CDECL *run)( struct translate *,
  88                            unsigned start,
  89                            unsigned count,
  90                            unsigned instance_id,
  91                            void *output_buffer);
  92 };
  93
  94
  95
  96 #if 0
  97 struct translate_context *translate_context_create( void );
  98 void translate_context_destroy( struct translate_context * );
  99
 100 struct translate *translate_lookup_or_create( struct translate_context *tctx,
 101                                               const struct translate_key *key );
 102 #endif
 103
 104
 105 struct translate *translate_create( const struct translate_key *key );
 106
 107 static INLINE int translate_keysize( const struct translate_key *key )
 108 {
 109    return 2 * sizeof(int) + key->nr_elements * sizeof(struct translate_element);
 110 }
 111
 112 static INLINE int translate_key_compare( const struct translate_key *a,
 113                                          const struct translate_key *b )
 114 {
 115    int keysize_a = translate_keysize(a);
 116    int keysize_b = translate_keysize(b);
 117
 118    if (keysize_a != keysize_b) {
 119       return keysize_a - keysize_b;
 120    }
 121    return memcmp(a, b, keysize_a);
 122 }
 123
 124
 125 static INLINE void translate_key_sanitize( struct translate_key *a )
 126 {
 127    int keysize = translate_keysize(a);
 128    char *ptr = (char *)a;
 129    memset(ptr + keysize, 0, sizeof(*a) - keysize);
 130 }
 131
 132
 133 /*******************************************************************************
 134  *  Private:
 135  */
 136 struct translate *translate_sse2_create( const struct translate_key *key );
 137
 138 struct translate *translate_generic_create( const struct translate_key *key );
 139
 140
 141 #endif