oneechanhax/vulkzample
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Implimented a Vertex Staging buffer to make startup and buffer-copies faster.
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This commit is contained in:
Rebekah 2024-07-15 06:59:47 -04:00
parent 128adb6947
commit 1350d6adf7
Signed by: oneechanhax
GPG Key ID: 0074BF373B812798
1 changed files with 32 additions and 3 deletions
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35
src/main.cpp
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@ -111,6 +111,8 @@ class VulkanExampleApplication {
std::unique_ptr<vk::raii::DeviceMemory> vk_buffer_vertex_memory; // in order to get a clean desctruction sequence, instantiate the DeviceMemory for the vertex buffer first
std::unique_ptr<vk::raii::Buffer> vk_buffer_vertex; // https://github.com/KhronosGroup/Vulkan-Hpp/blob/6f72ceca515d59f40d64b64cf2734f6261e1f9f2/RAII_Samples/13_InitVertexBuffer/13_InitVertexBuffer.cpp
std::unique_ptr<vk::raii::DeviceMemory> vk_buffer_vertex_staging_memory; // optional, but speeds things up!
std::unique_ptr<vk::raii::Buffer> vk_buffer_vertex_staging;
struct Vertex {
glm::vec2 pos;
@ -645,11 +647,14 @@ public:
}
{
const auto vertex_buffer_size = sizeof(triangle_vertices[0]) * triangle_vertices.size();
std::tie(this->vk_buffer_vertex, this->vk_buffer_vertex_memory) = CreateBuffer(vertex_buffer_size, vk::BufferUsageFlagBits::eVertexBuffer, vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent);
std::tie(this->vk_buffer_vertex_staging, this->vk_buffer_vertex_staging_memory) = CreateBuffer(vertex_buffer_size, vk::BufferUsageFlagBits::eTransferSrc, vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent);
std::uint8_t* const vertex_buffer_data = static_cast<std::uint8_t*>(this->vk_buffer_vertex_memory->mapMemory(0, vertex_buffer_size));
std::uint8_t* const vertex_buffer_data = static_cast<std::uint8_t*>(this->vk_buffer_vertex_staging_memory->mapMemory(0, vertex_buffer_size));
memcpy(vertex_buffer_data, triangle_vertices.data(), vertex_buffer_size);
this->vk_buffer_vertex_memory->unmapMemory();
this->vk_buffer_vertex_staging_memory->unmapMemory();
std::tie(this->vk_buffer_vertex, this->vk_buffer_vertex_memory) = CreateBuffer(vertex_buffer_size, vk::BufferUsageFlagBits::eTransferDst | vk::BufferUsageFlagBits::eVertexBuffer, vk::MemoryPropertyFlagBits::eDeviceLocal);
this->CopyBuffer(*this->vk_buffer_vertex_staging, *this->vk_buffer_vertex, vertex_buffer_size);
}
{ // syncronizing vars
this->vk_semephore_image_available = std::make_unique<vk::raii::Semaphore>(*this->vk_gpu, vk::SemaphoreCreateInfo {});
@ -704,6 +709,30 @@ protected:
allocated_buffer->bindMemory(**allocated_buffer_memory, 0);
return { std::make_unique<vk::raii::Buffer>(std::move(*allocated_buffer)), std::make_unique<vk::raii::DeviceMemory>(std::move(*allocated_buffer_memory)) };
};
void CopyBuffer(const vk::Buffer& src_buffer, const vk::Buffer& dest_buffer, const vk::DeviceSize& size) const {
const vk::CommandBufferAllocateInfo command_buffer_allocate_info {
.commandPool = **this->vk_command_pool,
.level = vk::CommandBufferLevel::ePrimary,
.commandBufferCount = 1
};
const auto command_buffer = std::move(vk::raii::CommandBuffers(*this->vk_gpu, command_buffer_allocate_info).front());
command_buffer.begin(vk::CommandBufferBeginInfo { .flags = vk::CommandBufferUsageFlagBits::eOneTimeSubmit });
const vk::BufferCopy copy_region {
//.srcOffset = 0, // Optional
//.dstOffset = 0, // Optional
.size = size
};
command_buffer.copyBuffer(src_buffer, dest_buffer, { copy_region });
command_buffer.end();
const vk::SubmitInfo submit_queue {
.commandBufferCount = 1,
.pCommandBuffers = &*command_buffer,
};
this->vk_queue_graphics->submit(submit_queue);
this->vk_queue_graphics->waitIdle();
};
public:
void Run() {