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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
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@ -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 */