/*
 * Copyright © 2017 Intel Corporation
 * Copyright © 2022 Collabora, Ltd
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

#include "vk_descriptor_update_template.h"

#include "vk_alloc.h"
#include "vk_common_entrypoints.h"
#include "vk_device.h"
#include "vk_log.h"

VKAPI_ATTR VkResult VKAPI_CALL
vk_common_CreateDescriptorUpdateTemplate(VkDevice _device,
   const VkDescriptorUpdateTemplateCreateInfo *pCreateInfo,
   const VkAllocationCallbacks *pAllocator,
   VkDescriptorUpdateTemplate *pDescriptorUpdateTemplate)
{
   VK_FROM_HANDLE(vk_device, device, _device);
   struct vk_descriptor_update_template *template;

   uint32_t entry_count = 0;
   for (uint32_t i = 0; i < pCreateInfo->descriptorUpdateEntryCount; i++) {
      if (pCreateInfo->pDescriptorUpdateEntries[i].descriptorCount > 0)
         entry_count++;
   }

   size_t size = sizeof(*template) + entry_count * sizeof(template->entries[0]);

   /* Because we're reference counting and lifetimes may not be what the
    * client expects, these have to be allocated off the device and not as
    * their own object.
    */
   template = vk_zalloc(&device->alloc, size, 8,
                        VK_SYSTEM_ALLOCATION_SCOPE_DEVICE);
   if (template == NULL)
      return vk_error(device, VK_ERROR_OUT_OF_HOST_MEMORY);

   vk_object_base_init(device, &template->base,
                       VK_OBJECT_TYPE_DESCRIPTOR_UPDATE_TEMPLATE);

   template->type = pCreateInfo->templateType;
   template->bind_point = pCreateInfo->pipelineBindPoint;
   template->ref_cnt = 1;

   if (template->type == VK_DESCRIPTOR_UPDATE_TEMPLATE_TYPE_DESCRIPTOR_SET)
      template->set = pCreateInfo->set;

   uint32_t entry_idx = 0;
   template->entry_count = entry_count;
   for (uint32_t i = 0; i < pCreateInfo->descriptorUpdateEntryCount; i++) {
      const VkDescriptorUpdateTemplateEntry *pEntry =
         &pCreateInfo->pDescriptorUpdateEntries[i];

      if (pEntry->descriptorCount == 0)
         continue;

      template->entries[entry_idx++] = (struct vk_descriptor_template_entry) {
         .type = pEntry->descriptorType,
         .binding = pEntry->dstBinding,
         .array_element = pEntry->dstArrayElement,
         .array_count = pEntry->descriptorCount,
         .offset = pEntry->offset,
         .stride = pEntry->stride,
      };
   }
   assert(entry_idx == entry_count);

   *pDescriptorUpdateTemplate =
      vk_descriptor_update_template_to_handle(template);

   return VK_SUCCESS;
}

VKAPI_ATTR void VKAPI_CALL
vk_common_DestroyDescriptorUpdateTemplate(VkDevice _device,
   VkDescriptorUpdateTemplate descriptorUpdateTemplate,
   const VkAllocationCallbacks *pAllocator)
{
   VK_FROM_HANDLE(vk_device, device, _device);
   VK_FROM_HANDLE(vk_descriptor_update_template, template,
                  descriptorUpdateTemplate);

   if (!template)
      return;

   vk_descriptor_update_template_unref(device, template);
}