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// Copyright 2018 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "VkRenderPass.hpp"
#include "VkStringify.hpp"
#include <cstring>
namespace vk {
RenderPass::RenderPass(const VkRenderPassCreateInfo *pCreateInfo, void *mem)
: attachmentCount(pCreateInfo->attachmentCount)
, subpassCount(pCreateInfo->subpassCount)
, dependencyCount(pCreateInfo->dependencyCount)
{
char *hostMemory = reinterpret_cast<char *>(mem);
// subpassCount must be greater than 0
ASSERT(pCreateInfo->subpassCount > 0);
size_t subpassesSize = pCreateInfo->subpassCount * sizeof(VkSubpassDescription);
subpasses = reinterpret_cast<VkSubpassDescription *>(hostMemory);
memcpy(subpasses, pCreateInfo->pSubpasses, subpassesSize);
hostMemory += subpassesSize;
uint32_t *masks = reinterpret_cast<uint32_t *>(hostMemory);
hostMemory += pCreateInfo->subpassCount * sizeof(uint32_t);
if(pCreateInfo->attachmentCount > 0)
{
size_t attachmentSize = pCreateInfo->attachmentCount * sizeof(VkAttachmentDescription);
attachments = reinterpret_cast<VkAttachmentDescription *>(hostMemory);
memcpy(attachments, pCreateInfo->pAttachments, attachmentSize);
hostMemory += attachmentSize;
size_t firstUseSize = pCreateInfo->attachmentCount * sizeof(int);
attachmentFirstUse = reinterpret_cast<int *>(hostMemory);
hostMemory += firstUseSize;
attachmentViewMasks = reinterpret_cast<uint32_t *>(hostMemory);
hostMemory += pCreateInfo->attachmentCount * sizeof(uint32_t);
for(auto i = 0u; i < pCreateInfo->attachmentCount; i++)
{
attachmentFirstUse[i] = -1;
attachmentViewMasks[i] = 0;
}
}
const VkBaseInStructure *extensionCreateInfo = reinterpret_cast<const VkBaseInStructure *>(pCreateInfo->pNext);
while(extensionCreateInfo)
{
switch(extensionCreateInfo->sType)
{
case VK_STRUCTURE_TYPE_RENDER_PASS_MULTIVIEW_CREATE_INFO:
{
// Renderpass uses multiview if this structure is present AND some subpass specifies
// a nonzero view mask
auto const *multiviewCreateInfo = reinterpret_cast<VkRenderPassMultiviewCreateInfo const *>(extensionCreateInfo);
for(auto i = 0u; i < pCreateInfo->subpassCount; i++)
{
masks[i] = multiviewCreateInfo->pViewMasks[i];
// This is now a multiview renderpass, so make the masks available
if(masks[i])
viewMasks = masks;
}
break;
}
default:
WARN("pCreateInfo->pNext sType = %s", vk::Stringify(extensionCreateInfo->sType).c_str());
break;
}
extensionCreateInfo = extensionCreateInfo->pNext;
}
// Deep copy subpasses
for(uint32_t i = 0; i < pCreateInfo->subpassCount; ++i)
{
const auto &subpass = pCreateInfo->pSubpasses[i];
subpasses[i].pInputAttachments = nullptr;
subpasses[i].pColorAttachments = nullptr;
subpasses[i].pResolveAttachments = nullptr;
subpasses[i].pDepthStencilAttachment = nullptr;
subpasses[i].pPreserveAttachments = nullptr;
if(subpass.inputAttachmentCount > 0)
{
size_t inputAttachmentsSize = subpass.inputAttachmentCount * sizeof(VkAttachmentReference);
subpasses[i].pInputAttachments = reinterpret_cast<VkAttachmentReference *>(hostMemory);
memcpy(const_cast<VkAttachmentReference *>(subpasses[i].pInputAttachments),
pCreateInfo->pSubpasses[i].pInputAttachments, inputAttachmentsSize);
hostMemory += inputAttachmentsSize;
for(auto j = 0u; j < subpasses[i].inputAttachmentCount; j++)
{
if(subpass.pInputAttachments[j].attachment != VK_ATTACHMENT_UNUSED)
MarkFirstUse(subpass.pInputAttachments[j].attachment, i);
}
}
if(subpass.colorAttachmentCount > 0)
{
size_t colorAttachmentsSize = subpass.colorAttachmentCount * sizeof(VkAttachmentReference);
subpasses[i].pColorAttachments = reinterpret_cast<VkAttachmentReference *>(hostMemory);
memcpy(const_cast<VkAttachmentReference *>(subpasses[i].pColorAttachments),
subpass.pColorAttachments, colorAttachmentsSize);
hostMemory += colorAttachmentsSize;
if(subpass.pResolveAttachments)
{
subpasses[i].pResolveAttachments = reinterpret_cast<VkAttachmentReference *>(hostMemory);
memcpy(const_cast<VkAttachmentReference *>(subpasses[i].pResolveAttachments),
subpass.pResolveAttachments, colorAttachmentsSize);
hostMemory += colorAttachmentsSize;
}
for(auto j = 0u; j < subpasses[i].colorAttachmentCount; j++)
{
if(subpass.pColorAttachments[j].attachment != VK_ATTACHMENT_UNUSED)
MarkFirstUse(subpass.pColorAttachments[j].attachment, i);
if(subpass.pResolveAttachments &&
subpass.pResolveAttachments[j].attachment != VK_ATTACHMENT_UNUSED)
MarkFirstUse(subpass.pResolveAttachments[j].attachment, i);
}
}
if(subpass.pDepthStencilAttachment)
{
subpasses[i].pDepthStencilAttachment = reinterpret_cast<VkAttachmentReference *>(hostMemory);
memcpy(const_cast<VkAttachmentReference *>(subpasses[i].pDepthStencilAttachment),
subpass.pDepthStencilAttachment, sizeof(VkAttachmentReference));
hostMemory += sizeof(VkAttachmentReference);
if(subpass.pDepthStencilAttachment->attachment != VK_ATTACHMENT_UNUSED)
MarkFirstUse(subpass.pDepthStencilAttachment->attachment, i);
}
if(subpass.preserveAttachmentCount > 0)
{
size_t preserveAttachmentSize = subpass.preserveAttachmentCount * sizeof(uint32_t);
subpasses[i].pPreserveAttachments = reinterpret_cast<uint32_t *>(hostMemory);
memcpy(const_cast<uint32_t *>(subpasses[i].pPreserveAttachments),
pCreateInfo->pSubpasses[i].pPreserveAttachments, preserveAttachmentSize);
hostMemory += preserveAttachmentSize;
for(auto j = 0u; j < subpasses[i].preserveAttachmentCount; j++)
{
if(subpass.pPreserveAttachments[j] != VK_ATTACHMENT_UNUSED)
MarkFirstUse(subpass.pPreserveAttachments[j], i);
}
}
}
if(pCreateInfo->dependencyCount > 0)
{
size_t dependenciesSize = pCreateInfo->dependencyCount * sizeof(VkSubpassDependency);
dependencies = reinterpret_cast<VkSubpassDependency *>(hostMemory);
memcpy(dependencies, pCreateInfo->pDependencies, dependenciesSize);
}
}
void RenderPass::destroy(const VkAllocationCallbacks *pAllocator)
{
vk::deallocate(subpasses, pAllocator); // attachments and dependencies are in the same allocation
}
size_t RenderPass::ComputeRequiredAllocationSize(const VkRenderPassCreateInfo *pCreateInfo)
{
size_t attachmentSize = pCreateInfo->attachmentCount * sizeof(VkAttachmentDescription) + pCreateInfo->attachmentCount * sizeof(int) // first use
+ pCreateInfo->attachmentCount * sizeof(uint32_t); // union of subpass view masks, per attachment
size_t subpassesSize = 0;
for(uint32_t i = 0; i < pCreateInfo->subpassCount; ++i)
{
const auto &subpass = pCreateInfo->pSubpasses[i];
uint32_t nbAttachments = subpass.inputAttachmentCount + subpass.colorAttachmentCount;
if(subpass.pResolveAttachments)
{
nbAttachments += subpass.colorAttachmentCount;
}
if(subpass.pDepthStencilAttachment)
{
nbAttachments += 1;
}
subpassesSize += sizeof(VkSubpassDescription) +
sizeof(VkAttachmentReference) * nbAttachments +
sizeof(uint32_t) * subpass.preserveAttachmentCount +
sizeof(uint32_t); // view mask
}
size_t dependenciesSize = pCreateInfo->dependencyCount * sizeof(VkSubpassDependency);
return attachmentSize + subpassesSize + dependenciesSize;
}
void RenderPass::getRenderAreaGranularity(VkExtent2D *pGranularity) const
{
pGranularity->width = 1;
pGranularity->height = 1;
}
void RenderPass::MarkFirstUse(int attachment, int subpass)
{
// FIXME: we may not actually need to track attachmentFirstUse if we're going to eagerly
// clear attachments at the start of the renderpass; can use attachmentViewMasks always instead.
if(attachmentFirstUse[attachment] == -1)
attachmentFirstUse[attachment] = subpass;
if(isMultiView())
attachmentViewMasks[attachment] |= viewMasks[subpass];
}
} // namespace vk