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LibGfx: Allocate command buffer for VulkanContext

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A later change will add the ability to allocate images. We need a
command buffer in order to initialize the layout of those images.
This commit is contained in:
Erik Kurzinger 2025-08-14 18:57:54 -04:00 • committed by Alexander Kalenik
commit 06c916d91c
Notes: github-actions[bot] 2025-08-18 22:32:11 +00:00
2 changed files with 42 additions and 0 deletions
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40
Libraries/LibGfx/VulkanContext.cpp
View file

@ -113,6 +113,41 @@ static ErrorOr<VkDevice> create_logical_device(VkPhysicalDevice physical_device,
return device;
}
static ErrorOr<VkCommandPool> create_command_pool(VkDevice logical_device, uint32_t queue_family_index)
{
VkCommandPoolCreateInfo command_pool_info = {
.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO,
.pNext = nullptr,
.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT,
.queueFamilyIndex = queue_family_index,
};
VkCommandPool command_pool = VK_NULL_HANDLE;
VkResult result = vkCreateCommandPool(logical_device, &command_pool_info, nullptr, &command_pool);
if (result != VK_SUCCESS) {
dbgln("vkCreateCommandPool returned {}", to_underlying(result));
return Error::from_string_literal("command pool creation failed");
}
return command_pool;
}
static ErrorOr<VkCommandBuffer> allocate_command_buffer(VkDevice logical_device, VkCommandPool commandPool)
{
VkCommandBufferAllocateInfo command_buffer_alloc_info = {
.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,
.pNext = nullptr,
.commandPool = commandPool,
.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY,
.commandBufferCount = 1,
};
VkCommandBuffer command_buffer = VK_NULL_HANDLE;
VkResult result = vkAllocateCommandBuffers(logical_device, &command_buffer_alloc_info, &command_buffer);
if (result != VK_SUCCESS) {
dbgln("vkAllocateCommandBuffers returned {}", to_underlying(result));
return Error::from_string_literal("command buffer allocation failed");
}
return command_buffer;
}
ErrorOr<VulkanContext> create_vulkan_context()
{
uint32_t const api_version = VK_API_VERSION_1_0;
@ -124,6 +159,9 @@ ErrorOr<VulkanContext> create_vulkan_context()
VkQueue graphics_queue;
vkGetDeviceQueue(logical_device, graphics_queue_family, 0, &graphics_queue);
VkCommandPool command_pool = TRY(create_command_pool(logical_device, graphics_queue_family));
VkCommandBuffer command_buffer = TRY(allocate_command_buffer(logical_device, command_pool));
return VulkanContext {
.api_version = api_version,
.instance = instance,
@ -131,6 +169,8 @@ ErrorOr<VulkanContext> create_vulkan_context()
.logical_device = logical_device,
.graphics_queue = graphics_queue,
.graphics_queue_family = graphics_queue_family,
.command_pool = command_pool,
.command_buffer = command_buffer,
};
}

2
Libraries/LibGfx/VulkanContext.h
View file

@ -19,6 +19,8 @@ struct VulkanContext {
VkDevice logical_device { VK_NULL_HANDLE };
VkQueue graphics_queue { VK_NULL_HANDLE };
uint32_t graphics_queue_family { 0 };
VkCommandPool command_pool { VK_NULL_HANDLE };
VkCommandBuffer command_buffer { VK_NULL_HANDLE };
};
ErrorOr<VulkanContext> create_vulkan_context();