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 struct translate_element
  48 {
  49    enum pipe_format input_format;
  50    enum pipe_format output_format;
  51    unsigned input_buffer:8;
  52    unsigned input_offset:24;
  53    unsigned instance_divisor;
  54    unsigned output_offset;
  55 };
  56
  57
  58 struct translate_key {
  59    unsigned output_stride;
  60    unsigned nr_elements;
  61    struct translate_element element[PIPE_MAX_ATTRIBS + 1];
  62 };
  63
  64
  65 struct translate {
  66    struct translate_key key;
  67
  68    void (*release)( struct translate * );
  69
  70    void (*set_buffer)( struct translate *,
  71                        unsigned i,
  72                        const void *ptr,
  73                        unsigned stride );
  74
  75    void (PIPE_CDECL *run_elts)( struct translate *,
  76                                 const unsigned *elts,
  77                                 unsigned count,
  78                                 void *output_buffer);
  79
  80    void (PIPE_CDECL *run)( struct translate *,
  81                            unsigned start,
  82                            unsigned count,
  83                            unsigned instance_id,
  84                            void *output_buffer);
  85 };
  86
  87
  88
  89 #if 0
  90 struct translate_context *translate_context_create( void );
  91 void translate_context_destroy( struct translate_context * );
  92
  93 struct translate *translate_lookup_or_create( struct translate_context *tctx,
  94                                               const struct translate_key *key );
  95 #endif
  96
  97
  98 struct translate *translate_create( const struct translate_key *key );
  99
 100 static INLINE int translate_keysize( const struct translate_key *key )
 101 {
 102    return 2 * sizeof(int) + key->nr_elements * sizeof(struct translate_element);
 103 }
 104
 105 static INLINE int translate_key_compare( const struct translate_key *a,
 106                                          const struct translate_key *b )
 107 {
 108    int keysize_a = translate_keysize(a);
 109    int keysize_b = translate_keysize(b);
 110
 111    if (keysize_a != keysize_b) {
 112       return keysize_a - keysize_b;
 113    }
 114    return memcmp(a, b, keysize_a);
 115 }
 116
 117
 118 static INLINE void translate_key_sanitize( struct translate_key *a )
 119 {
 120    int keysize = translate_keysize(a);
 121    char *ptr = (char *)a;
 122    memset(ptr + keysize, 0, sizeof(*a) - keysize);
 123 }
 124
 125
 126 /*******************************************************************************
 127  *  Private:
 128  */
 129 struct translate *translate_sse2_create( const struct translate_key *key );
 130
 131 struct translate *translate_generic_create( const struct translate_key *key );
 132
 133
 134 #endif