src/gallium/drivers/r300/r300_shader_semantics.h

   1 /*
   2  * Copyright 2009 Marek Olšák <maraeo@gmail.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  22
  23 #ifndef R300_SHADER_SEMANTICS_H
  24 #define R300_SHADER_SEMANTICS_H
  25
  26 #define ATTR_UNUSED             (-1)
  27 #define ATTR_COLOR_COUNT        2
  28 #define ATTR_GENERIC_COUNT      32
  29
  30 /* This structure contains information about what attributes are written by VS
  31  * or read by FS. (but not both) It's much easier to work with than
  32  * tgsi_shader_info.
  33  *
  34  * The variables contain indices to tgsi_shader_info semantics and those
  35  * indices are nothing else than input/output register numbers. */
  36 struct r300_shader_semantics {
  37     int pos;
  38     int psize;
  39     int color[ATTR_COLOR_COUNT];
  40     int bcolor[ATTR_COLOR_COUNT];
  41     int face;
  42     int generic[ATTR_GENERIC_COUNT];
  43     int fog;
  44     int wpos;
  45
  46     int num_generic;
  47 };
  48
  49 static inline void r300_shader_semantics_reset(
  50     struct r300_shader_semantics* info)
  51 {
  52     int i;
  53
  54     info->pos = ATTR_UNUSED;
  55     info->psize = ATTR_UNUSED;
  56     info->face = ATTR_UNUSED;
  57     info->fog = ATTR_UNUSED;
  58     info->wpos = ATTR_UNUSED;
  59
  60     for (i = 0; i < ATTR_COLOR_COUNT; i++) {
  61         info->color[i] = ATTR_UNUSED;
  62         info->bcolor[i] = ATTR_UNUSED;
  63     }
  64
  65     for (i = 0; i < ATTR_GENERIC_COUNT; i++) {
  66         info->generic[i] = ATTR_UNUSED;
  67     }
  68
  69     info->num_generic = 0;
  70 }
  71
  72 #endif