src/compiler/nir/nir_xfb_info.h

   1 /*
   2  * Copyright © 2018 Intel Corporation
   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  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #ifndef NIR_XFB_INFO_H
  25 #define NIR_XFB_INFO_H
  26
  27 #include "nir.h"
  28
  29 #define NIR_MAX_XFB_BUFFERS 4
  30 #define NIR_MAX_XFB_STREAMS 4
  31
  32 typedef struct {
  33    uint16_t stride;
  34    uint16_t varying_count;
  35 } nir_xfb_buffer_info;
  36
  37 typedef struct {
  38    uint8_t buffer;
  39    uint16_t offset;
  40    uint8_t location;
  41    uint8_t component_mask;
  42    uint8_t component_offset;
  43 } nir_xfb_output_info;
  44
  45 typedef struct {
  46    const struct glsl_type *type;
  47    uint8_t buffer;
  48    uint16_t offset;
  49 } nir_xfb_varying_info;
  50
  51 typedef struct nir_xfb_info {
  52    uint8_t buffers_written;
  53    uint8_t streams_written;
  54
  55    nir_xfb_buffer_info buffers[NIR_MAX_XFB_BUFFERS];
  56    uint8_t buffer_to_stream[NIR_MAX_XFB_STREAMS];
  57
  58    uint16_t varying_count;
  59    nir_xfb_varying_info *varyings;
  60
  61    uint16_t output_count;
  62    nir_xfb_output_info *outputs;
  63 } nir_xfb_info;
  64
  65 /* This method doesn't take into account varyings, as it is used to compute
  66  * how much size is needed to copy only the outputs.
  67  */
  68 static inline size_t
  69 nir_xfb_info_size(uint16_t output_count)
  70 {
  71    return sizeof(nir_xfb_info) + sizeof(nir_xfb_output_info) * output_count;
  72 }
  73
  74 nir_xfb_info *
  75 nir_gather_xfb_info(const nir_shader *shader, void *mem_ctx);
  76
  77 #endif /* NIR_XFB_INFO_H */