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<title>Vulkan Memory Allocator: Quick start</title>
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<div id="projectname">Vulkan Memory Allocator
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<li class="navelem"><a class="el" href="index.html">Vulkan Memory Allocator</a></li> </ul>
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<div class="header">
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<div class="headertitle">
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<div class="title">Quick start </div> </div>
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</div><!--header-->
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<div class="contents">
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<div class="textblock"><p>In your project code:</p>
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<ol type="1">
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<li>Include "vk_mem_alloc.h" file wherever you want to use the library.</li>
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<li>In exacly one C++ file define following macro before include to build library implementation.</li>
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</ol>
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<pre class="fragment">#define VMA_IMPLEMENTATION
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#include "vk_mem_alloc.h"
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</pre><p>At program startup:</p>
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<ol type="1">
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<li>Initialize Vulkan to have <code>VkPhysicalDevice</code> and <code>VkDevice</code> object.</li>
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<li>Fill <a class="el" href="struct_vma_allocator_create_info.html" title="Description of a Allocator to be created. ">VmaAllocatorCreateInfo</a> structure and create <code>VmaAllocator</code> object by calling <a class="el" href="vk__mem__alloc_8h.html#a200692051ddb34240248234f5f4c17bb" title="Creates Allocator object. ">vmaCreateAllocator()</a>.</li>
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</ol>
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<pre class="fragment">VmaAllocatorCreateInfo allocatorInfo = {};
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allocatorInfo.physicalDevice = physicalDevice;
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allocatorInfo.device = device;
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VmaAllocator allocator;
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vmaCreateAllocator(&allocatorInfo, &allocator);
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</pre><p>When you want to create a buffer or image:</p>
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<ol type="1">
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<li>Fill <code>VkBufferCreateInfo</code> / <code>VkImageCreateInfo</code> structure.</li>
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<li>Fill <a class="el" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a> structure.</li>
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<li>Call <a class="el" href="vk__mem__alloc_8h.html#ac72ee55598617e8eecca384e746bab51">vmaCreateBuffer()</a> / <a class="el" href="vk__mem__alloc_8h.html#a02a94f25679275851a53e82eacbcfc73" title="Function similar to vmaCreateBuffer(). ">vmaCreateImage()</a> to get <code>VkBuffer</code>/<code>VkImage</code> with memory already allocated and bound to it.</li>
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</ol>
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<pre class="fragment">VkBufferCreateInfo bufferInfo = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };
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bufferInfo.size = 65536;
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bufferInfo.usage = VK_BUFFER_USAGE_VERTEX_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT;
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VmaAllocationCreateInfo allocInfo = {};
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allocInfo.usage = VMA_MEMORY_USAGE_GPU_ONLY;
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VkBuffer buffer;
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VmaAllocation allocation;
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vmaCreateBuffer(allocator, &bufferInfo, &allocInfo, &buffer, &allocation, nullptr);
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</pre><p>Don't forget to destroy your objects when no longer needed:</p>
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<pre class="fragment">vmaDestroyBuffer(allocator, buffer, allocation);
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vmaDestroyAllocator(allocator);</pre> </div></div><!-- contents -->
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</a> 1.8.13
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