1/*
2 * Copyright © 2016 Bas Nieuwenhuizen
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
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24#ifndef TU_DESCRIPTOR_SET_H
25#define TU_DESCRIPTOR_SET_H
26
27#include <vulkan/vulkan.h>
28
29/* The hardware supports 5 descriptor sets, but we reserve 1 for dynamic
30 * descriptors and input attachments.
31 */
32#define MAX_SETS 4
33
34struct tu_descriptor_set_binding_layout
35{
36   VkDescriptorType type;
37
38   /* Number of array elements in this binding */
39   uint32_t array_size;
40
41   /* The size in bytes of each Vulkan descriptor. */
42   uint32_t size;
43
44   uint32_t offset;
45
46   /* Index into the pDynamicOffsets array for dynamic descriptors, as well as
47    * the array of dynamic descriptors (offsetted by
48    * tu_pipeline_layout::set::dynamic_offset_start).
49    */
50   uint32_t dynamic_offset_offset;
51
52   /* Offset in the tu_descriptor_set_layout of the immutable samplers, or 0
53    * if there are no immutable samplers. */
54   uint32_t immutable_samplers_offset;
55
56   /* Offset in the tu_descriptor_set_layout of the ycbcr samplers, or 0
57    * if there are no immutable samplers. */
58   uint32_t ycbcr_samplers_offset;
59
60   /* Shader stages that use this binding */
61   uint32_t shader_stages;
62};
63
64struct tu_descriptor_set_layout
65{
66   struct vk_object_base base;
67
68   /* The create flags for this descriptor set layout */
69   VkDescriptorSetLayoutCreateFlags flags;
70
71   /* Number of bindings in this descriptor set */
72   uint32_t binding_count;
73
74   /* Total size of the descriptor set with room for all array entries */
75   uint32_t size;
76
77   /* Shader stages affected by this descriptor set */
78   uint16_t shader_stages;
79
80   /* Number of dynamic offsets used by this descriptor set */
81   uint16_t dynamic_offset_count;
82
83   /* A bitfield of which dynamic buffers are ubo's, to make the
84    * descriptor-binding-time patching easier.
85    */
86   uint32_t dynamic_ubo;
87
88   bool has_immutable_samplers;
89   bool has_variable_descriptors;
90
91   /* Bindings in this descriptor set */
92   struct tu_descriptor_set_binding_layout binding[0];
93};
94
95struct tu_pipeline_layout
96{
97   struct vk_object_base base;
98
99   struct
100   {
101      struct tu_descriptor_set_layout *layout;
102      uint32_t size;
103      uint32_t dynamic_offset_start;
104   } set[MAX_SETS];
105
106   uint32_t num_sets;
107   uint32_t push_constant_size;
108   uint32_t dynamic_offset_count;
109};
110
111static inline const struct tu_sampler *
112tu_immutable_samplers(const struct tu_descriptor_set_layout *set,
113                      const struct tu_descriptor_set_binding_layout *binding)
114{
115   return (void *) ((const char *) set + binding->immutable_samplers_offset);
116}
117
118static inline const struct tu_sampler_ycbcr_conversion *
119tu_immutable_ycbcr_samplers(const struct tu_descriptor_set_layout *set,
120                            const struct tu_descriptor_set_binding_layout *binding)
121{
122   if (!binding->ycbcr_samplers_offset)
123      return NULL;
124
125   return (void *) ((const char *) set + binding->ycbcr_samplers_offset);
126}
127
128#endif /* TU_DESCRIPTOR_SET_H */
129