src/mesa/shader/slang/slang_export.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5
   4  *
   5  * Copyright (C) 2006  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #if !defined SLANG_EXPORT_H
  26 #define SLANG_EXPORT_H
  27
  28 #if defined __cplusplus
  29 extern "C" {
  30 #endif
  31
  32 /*
  33  * Basic data quantity to transfer between application and assembly.
  34  * The <size> is the actual size of the data quantity including padding, if any. It is
  35  * used to calculate offsets from the beginning of the data.
  36  * The <array_len> is not 0, the data quantity is an array of <array_len> size.
  37  * If the <structure> is not NULL, the data quantity is a struct. The <basic_type> is
  38  * invalid and the <field_count> holds the size of the <structure> array.
  39  * The <basic_type> values match those of <type> parameter for glGetActiveUniformARB.
  40  */
  41
  42 typedef struct slang_export_data_quant_
  43 {
  44         slang_atom name;
  45         GLuint size;
  46         GLuint array_len;
  47         struct slang_export_data_quant_ *structure;
  48         union
  49         {
  50                 GLenum basic_type;
  51                 GLuint field_count;
  52         } u;
  53 } slang_export_data_quant;
  54
  55 GLvoid slang_export_data_quant_ctr (slang_export_data_quant *);
  56 GLvoid slang_export_data_quant_dtr (slang_export_data_quant *);
  57 slang_export_data_quant *slang_export_data_quant_add_field (slang_export_data_quant *);
  58
  59 /*
  60  * Data access pattern. Specifies how data is accessed at what frequency.
  61  */
  62
  63 typedef enum
  64 {
  65         slang_exp_uniform,
  66         slang_exp_varying,
  67         slang_exp_attribute
  68 } slang_export_data_access;
  69
  70 /*
  71  * Data export entry. Holds the data type information, access pattern and base address.
  72  */
  73
  74 typedef struct
  75 {
  76         slang_export_data_quant quant;
  77         slang_export_data_access access;
  78         GLuint address;
  79 } slang_export_data_entry;
  80
  81 GLvoid slang_export_data_entry_ctr (slang_export_data_entry *);
  82 GLvoid slang_export_data_entry_dtr (slang_export_data_entry *);
  83
  84 /*
  85  * Data export table. Holds <count> elements in <entries> array.
  86  */
  87
  88 typedef struct
  89 {
  90         slang_export_data_entry *entries;
  91         GLuint count;
  92         slang_atom_pool *atoms;
  93 } slang_export_data_table;
  94
  95 GLvoid slang_export_data_table_ctr (slang_export_data_table *);
  96 GLvoid slang_export_data_table_dtr (slang_export_data_table *);
  97 slang_export_data_entry *slang_export_data_table_add (slang_export_data_table *);
  98
  99 /*
 100  * _slang_find_exported_data()
 101  *
 102  * Parses the name string and returns corresponding data entry, data quantity and offset.
 103  * Returns GL_TRUE if the data is found, returns GL_FALSE otherwise.
 104  */
 105
 106 GLboolean _slang_find_exported_data (slang_export_data_table *, const char *,
 107         slang_export_data_entry **, slang_export_data_quant **, GLuint *);
 108
 109 #ifdef __cplusplus
 110 }
 111 #endif
 112
 113 #endif
 114