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// Copyright 2019 The Amber 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 "src/vulkan/buffer_backed_descriptor.h"
#include <cstring>
#include "src/vulkan/command_buffer.h"
#include "src/vulkan/device.h"
namespace amber {
namespace vulkan {
BufferBackedDescriptor::BufferBackedDescriptor(Buffer* buffer,
DescriptorType type,
Device* device,
uint32_t desc_set,
uint32_t binding)
: Descriptor(type, device, desc_set, binding) {
AddAmberBuffer(buffer);
}
BufferBackedDescriptor::~BufferBackedDescriptor() = default;
Result BufferBackedDescriptor::RecordCopyDataToResourceIfNeeded(
CommandBuffer* command) {
auto resources = GetResources();
auto buffers = GetAmberBuffers();
if (resources.size() != buffers.size())
return Result(
"Vulkan: BufferBackedDescriptor::RecordCopyDataToResourceIfNeeded() "
"resource and buffer vector sizes are not matching");
for (size_t i = 0; i < resources.size(); i++) {
if (!buffers[i]->ValuePtr()->empty()) {
resources[i]->UpdateMemoryWithRawData(*buffers[i]->ValuePtr());
// If the resource is read-only, keep the buffer data; Amber won't copy
// read-only resources back into the host buffers, so it makes sense to
// leave the buffer intact.
if (!IsReadOnly())
buffers[i]->ValuePtr()->clear();
}
resources[i]->CopyToDevice(command);
}
return {};
}
Result BufferBackedDescriptor::RecordCopyDataToHost(CommandBuffer* command) {
if (!IsReadOnly()) {
if (GetResources().empty()) {
return Result(
"Vulkan: BufferBackedDescriptor::RecordCopyDataToHost() no transfer "
"resources");
}
for (const auto& r : GetResources())
r->CopyToHost(command);
}
return {};
}
Result BufferBackedDescriptor::MoveResourceToBufferOutput() {
// No need to copy results of read only resources.
if (IsReadOnly())
return {};
auto resources = GetResources();
auto buffers = GetAmberBuffers();
if (resources.size() != buffers.size())
return Result(
"Vulkan: BufferBackedDescriptor::MoveResourceToBufferOutput() resource "
"and buffer vector sizes are not matching");
if (resources.empty()) {
return Result(
"Vulkan: BufferBackedDescriptor::MoveResourceToBufferOutput() no "
"transfer resource");
}
for (size_t i = 0; i < resources.size(); i++) {
void* resource_memory_ptr = resources[i]->HostAccessibleMemoryPtr();
if (!resource_memory_ptr) {
return Result(
"Vulkan: BufferBackedDescriptor::MoveResourceToBufferOutput() "
"no host accessible memory pointer");
}
if (!buffers[i]->ValuePtr()->empty()) {
return Result(
"Vulkan: BufferBackedDescriptor::MoveResourceToBufferOutput() "
"output buffer is not empty");
}
auto size_in_bytes = resources[i]->GetSizeInBytes();
buffers[i]->SetElementCount(size_in_bytes /
buffers[i]->GetFormat()->SizeInBytes());
buffers[i]->ValuePtr()->resize(size_in_bytes);
std::memcpy(buffers[i]->ValuePtr()->data(), resource_memory_ptr,
size_in_bytes);
}
return {};
}
bool BufferBackedDescriptor::IsReadOnly() const {
switch (type_) {
case DescriptorType::kUniformBuffer:
case DescriptorType::kUniformBufferDynamic:
case DescriptorType::kUniformTexelBuffer:
case DescriptorType::kSampledImage:
case DescriptorType::kCombinedImageSampler:
return true;
case DescriptorType::kStorageBuffer:
case DescriptorType::kStorageBufferDynamic:
case DescriptorType::kStorageTexelBuffer:
case DescriptorType::kStorageImage:
return false;
default:
assert(false && "Unexpected descriptor type");
return false;
}
}
} // namespace vulkan
} // namespace amber
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