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// Copyright 2018 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/vertex_buffer.h"
#include <cassert>
#include <cstring>
#include "src/make_unique.h"
#include "src/vulkan/command_buffer.h"
#include "src/vulkan/device.h"
namespace amber {
namespace vulkan {
namespace {
VkVertexInputRate GetVkInputRate(InputRate rate) {
return rate == InputRate::kVertex ? VK_VERTEX_INPUT_RATE_VERTEX
: VK_VERTEX_INPUT_RATE_INSTANCE;
}
} // namespace
VertexBuffer::VertexBuffer(Device* device) : device_(device) {}
VertexBuffer::~VertexBuffer() = default;
void VertexBuffer::SetData(uint8_t location, Buffer* buffer, InputRate rate) {
auto format = buffer->GetFormat();
const uint32_t binding = static_cast<uint32_t>(vertex_attr_desc_.size());
vertex_attr_desc_.emplace_back();
vertex_attr_desc_.back().binding = binding;
vertex_attr_desc_.back().location = location;
vertex_attr_desc_.back().offset = 0u;
vertex_attr_desc_.back().format = device_->GetVkFormat(*format);
vertex_binding_desc_.emplace_back();
vertex_binding_desc_.back().binding = binding;
vertex_binding_desc_.back().stride = format->SizeInBytes();
vertex_binding_desc_.back().inputRate = GetVkInputRate(rate);
data_.push_back(buffer);
}
void VertexBuffer::BindToCommandBuffer(CommandBuffer* command) {
std::vector<VkBuffer> buffers;
std::vector<VkDeviceSize> offsets;
for (const auto& buf : transfer_buffers_) {
buffers.push_back(buf->GetVkBuffer());
offsets.push_back(0);
}
device_->GetPtrs()->vkCmdBindVertexBuffers(
command->GetVkCommandBuffer(), 0,
static_cast<uint32_t>(transfer_buffers_.size()), buffers.data(),
offsets.data());
}
Result VertexBuffer::SendVertexData(CommandBuffer* command) {
if (!is_vertex_data_pending_)
return Result("Vulkan::Vertices data was already sent");
for (const auto& buf : data_) {
uint32_t bytes = buf->GetSizeInBytes();
transfer_buffers_.push_back(
MakeUnique<TransferBuffer>(device_, bytes, nullptr));
Result r = transfer_buffers_.back()->Initialize(
VK_BUFFER_USAGE_VERTEX_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT);
std::memcpy(transfer_buffers_.back()->HostAccessibleMemoryPtr(),
buf->GetValues<void>(), bytes);
transfer_buffers_.back()->CopyToDevice(command);
if (!r.IsSuccess())
return r;
}
is_vertex_data_pending_ = false;
return {};
}
} // namespace vulkan
} // namespace amber
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