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xo-imgui: refactor ex4a: create_descriptor_pool()

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This commit is contained in:
Roland Conybeare 2025-11-11 10:39:20 -05:00
commit 43868c0888
2 changed files with 37 additions and 29 deletions
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29
xo-imgui/example/ex4a/VulkanApp.cpp
View file

@ -361,4 +361,33 @@ MinimalImGuiVulkan::create_sync_objects()
}
}
void
MinimalImGuiVulkan::create_descriptor_pool()
{
VkDescriptorPoolSize pool_sizes[] = {
{ VK_DESCRIPTOR_TYPE_SAMPLER, 1000 },
{ VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1000 },
{ VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, 1000 },
{ VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, 1000 },
{ VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER, 1000 },
{ VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER, 1000 },
{ VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1000 },
{ VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1000 },
{ VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC, 1000 },
{ VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC, 1000 },
{ VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT, 1000 }
};
VkDescriptorPoolCreateInfo pool_info = {};
pool_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
pool_info.flags = VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT;
pool_info.maxSets = 1000 * IM_ARRAYSIZE(pool_sizes);
pool_info.poolSizeCount = (uint32_t)IM_ARRAYSIZE(pool_sizes);
pool_info.pPoolSizes = pool_sizes;
if (vkCreateDescriptorPool(device_, &pool_info, nullptr, &(this->descriptor_pool_)) != VK_SUCCESS) {
throw std::runtime_error("Failed to create descriptor pool!");
}
}
/* end VulkanApp.cpp */

37
xo-imgui/example/ex4a/VulkanApp.hpp
View file

@ -85,32 +85,10 @@ private:
*/
void create_sync_objects();
void create_descriptor_pool() {
VkDescriptorPoolSize pool_sizes[] = {
{ VK_DESCRIPTOR_TYPE_SAMPLER, 1000 },
{ VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1000 },
{ VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, 1000 },
{ VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, 1000 },
{ VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER, 1000 },
{ VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER, 1000 },
{ VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1000 },
{ VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1000 },
{ VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC, 1000 },
{ VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC, 1000 },
{ VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT, 1000 }
};
VkDescriptorPoolCreateInfo pool_info = {};
pool_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
pool_info.flags = VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT;
pool_info.maxSets = 1000 * IM_ARRAYSIZE(pool_sizes);
pool_info.poolSizeCount = (uint32_t)IM_ARRAYSIZE(pool_sizes);
pool_info.pPoolSizes = pool_sizes;
if (vkCreateDescriptorPool(device_, &pool_info, nullptr, &descriptorPool) != VK_SUCCESS) {
throw std::runtime_error("Failed to create descriptor pool!");
}
}
/*
* populate @ref descriptor_pool_
*/
void create_descriptor_pool();
void init_imgui() {
// Setup Dear ImGui context
@ -130,7 +108,7 @@ private:
init_info.QueueFamily = graphics_queue_family_;
init_info.Queue = graphics_queue_;
init_info.PipelineCache = VK_NULL_HANDLE;
init_info.DescriptorPool = descriptorPool;
init_info.DescriptorPool = descriptor_pool_;
init_info.RenderPass = render_pass_;
init_info.Subpass = 0;
init_info.MinImageCount = MAX_FRAMES_IN_FLIGHT;
@ -389,7 +367,7 @@ private:
this->cleanupSwapchain();
vkDestroyRenderPass(device_, render_pass_, nullptr);
vkDestroyDescriptorPool(device_, descriptorPool, nullptr);
vkDestroyDescriptorPool(device_, descriptor_pool_, nullptr);
vkDestroyDevice(device_, nullptr);
vkDestroySurfaceKHR(instance_, this->surface_, nullptr);
vkDestroyInstance(instance_, nullptr);
@ -436,7 +414,8 @@ private:
std::vector<VkSemaphore> image_available_semaphores_;
std::vector<VkSemaphore> render_finished_semaphores_;
std::vector<VkFence> inflight_fences_;
VkDescriptorPool descriptorPool;
VkDescriptorPool descriptor_pool_;
uint32_t currentFrame = 0;
const int MAX_FRAMES_IN_FLIGHT = 2;