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
34 struct 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
64 struct 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
95 struct 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
111 static inline const struct tu_sampler *
tu_immutable_samplers(const struct tu_descriptor_set_layout * set,const struct tu_descriptor_set_binding_layout * binding)112 tu_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
118 static inline const struct tu_sampler_ycbcr_conversion *
tu_immutable_ycbcr_samplers(const struct tu_descriptor_set_layout * set,const struct tu_descriptor_set_binding_layout * binding)119 tu_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