src/vulkan/util/vk_util.h

   1 /*
   2  * Copyright © 2017 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 #ifndef VK_UTIL_H
  24 #define VK_UTIL_H
  25
  26 /* common inlines and macros for vulkan drivers */
  27
  28 #include <vulkan/vulkan.h>
  29
  30 struct vk_struct_common {
  31     VkStructureType sType;
  32     struct vk_struct_common *pNext;
  33 };
  34
  35 #define vk_foreach_struct(__iter, __start) \
  36    for (struct vk_struct_common *__iter = (struct vk_struct_common *)(__start); \
  37         __iter; __iter = __iter->pNext)
  38
  39 #define vk_foreach_struct_const(__iter, __start) \
  40    for (const struct vk_struct_common *__iter = (const struct vk_struct_common *)(__start); \
  41         __iter; __iter = __iter->pNext)
  42
  43 /**
  44  * A wrapper for a Vulkan output array. A Vulkan output array is one that
  45  * follows the convention of the parameters to
  46  * vkGetPhysicalDeviceQueueFamilyProperties().
  47  *
  48  * Example Usage:
  49  *
  50  *    VkResult
  51  *    vkGetPhysicalDeviceQueueFamilyProperties(
  52  *       VkPhysicalDevice           physicalDevice,
  53  *       uint32_t*                  pQueueFamilyPropertyCount,
  54  *       VkQueueFamilyProperties*   pQueueFamilyProperties)
  55  *    {
  56  *       VK_OUTARRAY_MAKE(props, pQueueFamilyProperties,
  57  *                         pQueueFamilyPropertyCount);
  58  *
  59  *       vk_outarray_append(&props, p) {
  60  *          p->queueFlags = ...;
  61  *          p->queueCount = ...;
  62  *       }
  63  *
  64  *       vk_outarray_append(&props, p) {
  65  *          p->queueFlags = ...;
  66  *          p->queueCount = ...;
  67  *       }
  68  *
  69  *       return vk_outarray_status(&props);
  70  *    }
  71  */
  72 struct __vk_outarray {
  73    /** May be null. */
  74    void *data;
  75
  76    /**
  77     * Capacity, in number of elements. Capacity is unlimited (UINT32_MAX) if
  78     * data is null.
  79     */
  80    uint32_t cap;
  81
  82    /**
  83     * Count of elements successfully written to the array. Every write is
  84     * considered successful if data is null.
  85     */
  86    uint32_t *filled_len;
  87
  88    /**
  89     * Count of elements that would have been written to the array if its
  90     * capacity were sufficient. Vulkan functions often return VK_INCOMPLETE
  91     * when `*filled_len < wanted_len`.
  92     */
  93    uint32_t wanted_len;
  94 };
  95
  96 static inline void
  97 __vk_outarray_init(struct __vk_outarray *a,
  98                    void *data, uint32_t *restrict len)
  99 {
 100    a->data = data;
 101    a->cap = *len;
 102    a->filled_len = len;
 103    *a->filled_len = 0;
 104    a->wanted_len = 0;
 105
 106    if (a->data == NULL)
 107       a->cap = UINT32_MAX;
 108 }
 109
 110 static inline VkResult
 111 __vk_outarray_status(const struct __vk_outarray *a)
 112 {
 113    if (*a->filled_len < a->wanted_len)
 114       return VK_INCOMPLETE;
 115    else
 116       return VK_SUCCESS;
 117 }
 118
 119 static inline void *
 120 __vk_outarray_next(struct __vk_outarray *a, size_t elem_size)
 121 {
 122    void *p = NULL;
 123
 124    a->wanted_len += 1;
 125
 126    if (*a->filled_len >= a->cap)
 127       return NULL;
 128
 129    if (a->data != NULL)
 130       p = a->data + (*a->filled_len) * elem_size;
 131
 132    *a->filled_len += 1;
 133
 134    return p;
 135 }
 136
 137 #define vk_outarray(elem_t) \
 138    struct { \
 139       struct __vk_outarray base; \
 140       elem_t meta[]; \
 141    }
 142
 143 #define vk_outarray_typeof_elem(a) __typeof__((a)->meta[0])
 144 #define vk_outarray_sizeof_elem(a) sizeof((a)->meta[0])
 145
 146 #define vk_outarray_init(a, data, len) \
 147    __vk_outarray_init(&(a)->base, (data), (len))
 148
 149 #define VK_OUTARRAY_MAKE(name, data, len) \
 150    vk_outarray(__typeof__((data)[0])) name; \
 151    vk_outarray_init(&name, (data), (len))
 152
 153 #define vk_outarray_status(a) \
 154    __vk_outarray_status(&(a)->base)
 155
 156 #define vk_outarray_next(a) \
 157    ((vk_outarray_typeof_elem(a) *) \
 158       __vk_outarray_next(&(a)->base, vk_outarray_sizeof_elem(a)))
 159
 160 /**
 161  * Append to a Vulkan output array.
 162  *
 163  * This is a block-based macro. For example:
 164  *
 165  *    vk_outarray_append(&a, elem) {
 166  *       elem->foo = ...;
 167  *       elem->bar = ...;
 168  *    }
 169  *
 170  * The array `a` has type `vk_outarray(elem_t) *`. It is usually declared with
 171  * VK_OUTARRAY_MAKE(). The variable `elem` is block-scoped and has type
 172  * `elem_t *`.
 173  *
 174  * The macro unconditionally increments the array's `wanted_len`. If the array
 175  * is not full, then the macro also increment its `filled_len` and then
 176  * executes the block. When the block is executed, `elem` is non-null and
 177  * points to the newly appended element.
 178  */
 179 #define vk_outarray_append(a, elem) \
 180    for (vk_outarray_typeof_elem(a) *elem = vk_outarray_next(a); \
 181         elem != NULL; elem = NULL)
 182
 183 static inline void *
 184 __vk_find_struct(void *start, VkStructureType sType)
 185 {
 186    vk_foreach_struct(s, start) {
 187       if (s->sType == sType)
 188          return s;
 189    }
 190
 191    return NULL;
 192 }
 193
 194 #define vk_find_struct(__start, __sType) \
 195    __vk_find_struct((__start), VK_STRUCTURE_TYPE_##__sType)
 196
 197 #define vk_find_struct_const(__start, __sType) \
 198    (const void *)__vk_find_struct((void *)(__start), VK_STRUCTURE_TYPE_##__sType)
 199
 200 uint32_t vk_get_driver_version(void);
 201
 202 uint32_t vk_get_version_override(void);
 203
 204 #define VK_EXT_OFFSET (1000000000UL)
 205 #define VK_ENUM_EXTENSION(__enum) \
 206    ((__enum) >= VK_EXT_OFFSET ? ((((__enum) - VK_EXT_OFFSET) / 1000UL) + 1) : 0)
 207 #define VK_ENUM_OFFSET(__enum) \
 208    ((__enum) >= VK_EXT_OFFSET ? ((__enum) % 1000) : (__enum))
 209
 210 #endif /* VK_UTIL_H */