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// Copyright 2018 The Dawn Authors
//
// 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 "dawn_native/vulkan/BindGroupVk.h"
#include "dawn_native/vulkan/BindGroupLayoutVk.h"
#include "dawn_native/vulkan/BufferVk.h"
#include "dawn_native/vulkan/DeviceVk.h"
#include "dawn_native/vulkan/FencedDeleter.h"
#include "dawn_native/vulkan/SamplerVk.h"
#include "dawn_native/vulkan/TextureVk.h"
#include "common/BitSetIterator.h"
namespace dawn_native { namespace vulkan {
BindGroup::BindGroup(Device* device, const BindGroupDescriptor* descriptor)
: BindGroupBase(device, descriptor) {
// Create a pool to hold our descriptor set.
// TODO(cwallez@chromium.org): This horribly inefficient, find a way to be better, for
// example by having one pool per bind group layout instead.
uint32_t numPoolSizes = 0;
auto poolSizes = ToBackend(GetLayout())->ComputePoolSizes(&numPoolSizes);
VkDescriptorPoolCreateInfo createInfo;
createInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
createInfo.pNext = nullptr;
createInfo.flags = 0;
createInfo.maxSets = 1;
createInfo.poolSizeCount = numPoolSizes;
createInfo.pPoolSizes = poolSizes.data();
if (device->fn.CreateDescriptorPool(device->GetVkDevice(), &createInfo, nullptr, &mPool) !=
VK_SUCCESS) {
ASSERT(false);
}
// Now do the allocation of one descriptor set, this is very suboptimal too.
VkDescriptorSetLayout vkLayout = ToBackend(GetLayout())->GetHandle();
VkDescriptorSetAllocateInfo allocateInfo;
allocateInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
allocateInfo.pNext = nullptr;
allocateInfo.descriptorPool = mPool;
allocateInfo.descriptorSetCount = 1;
allocateInfo.pSetLayouts = &vkLayout;
if (device->fn.AllocateDescriptorSets(device->GetVkDevice(), &allocateInfo, &mHandle) !=
VK_SUCCESS) {
ASSERT(false);
}
// Now do a write of a single descriptor set with all possible chained data allocated on the
// stack.
uint32_t numWrites = 0;
std::array<VkWriteDescriptorSet, kMaxBindingsPerGroup> writes;
std::array<VkDescriptorBufferInfo, kMaxBindingsPerGroup> writeBufferInfo;
std::array<VkDescriptorImageInfo, kMaxBindingsPerGroup> writeImageInfo;
const auto& layoutInfo = GetLayout()->GetBindingInfo();
for (uint32_t bindingIndex : IterateBitSet(layoutInfo.mask)) {
auto& write = writes[numWrites];
write.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
write.pNext = nullptr;
write.dstSet = mHandle;
write.dstBinding = bindingIndex;
write.dstArrayElement = 0;
write.descriptorCount = 1;
write.descriptorType = VulkanDescriptorType(layoutInfo.types[bindingIndex]);
switch (layoutInfo.types[bindingIndex]) {
case dawn::BindingType::UniformBuffer:
case dawn::BindingType::StorageBuffer: {
BufferBinding binding = GetBindingAsBufferBinding(bindingIndex);
writeBufferInfo[numWrites].buffer = ToBackend(binding.buffer)->GetHandle();
writeBufferInfo[numWrites].offset = binding.offset;
writeBufferInfo[numWrites].range = binding.size;
write.pBufferInfo = &writeBufferInfo[numWrites];
} break;
case dawn::BindingType::Sampler: {
Sampler* sampler = ToBackend(GetBindingAsSampler(bindingIndex));
writeImageInfo[numWrites].sampler = sampler->GetHandle();
write.pImageInfo = &writeImageInfo[numWrites];
} break;
case dawn::BindingType::SampledTexture: {
TextureView* view = ToBackend(GetBindingAsTextureView(bindingIndex));
writeImageInfo[numWrites].imageView = view->GetHandle();
// TODO(cwallez@chromium.org): This isn't true in general: if the image can has
// two read-only usages one of which is Sampled. Works for now though :)
writeImageInfo[numWrites].imageLayout =
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
write.pImageInfo = &writeImageInfo[numWrites];
} break;
case dawn::BindingType::DynamicUniformBuffer:
case dawn::BindingType::DynamicStorageBuffer:
UNREACHABLE();
break;
default:
UNREACHABLE();
}
numWrites++;
}
device->fn.UpdateDescriptorSets(device->GetVkDevice(), numWrites, writes.data(), 0,
nullptr);
}
BindGroup::~BindGroup() {
// The descriptor set doesn't need to be delete because it's done implicitly when the
// descriptor pool is destroyed.
mHandle = VK_NULL_HANDLE;
if (mPool != VK_NULL_HANDLE) {
ToBackend(GetDevice())->GetFencedDeleter()->DeleteWhenUnused(mPool);
mPool = VK_NULL_HANDLE;
}
}
VkDescriptorSet BindGroup::GetHandle() const {
return mHandle;
}
}} // namespace dawn_native::vulkan
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