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@ -26,22 +26,23 @@ Memory allocation and resource (buffer and image) creation in Vulkan is difficul
# Features # Features
This library can help game developers to manage memory allocations and resource creation by offering some higher-level functions. Features of the library are divided into several layers, low level to high level: This library can help game developers to manage memory allocations and resource creation by offering some higher-level functions:
1. Functions that help to choose correct and optimal memory type based on intended usage of the memory. 1. Functions that help to choose correct and optimal memory type based on intended usage of the memory.
- Required or preferred traits of the memory are expressed using higher-level description comparing to Vulkan flags. - Required or preferred traits of the memory are expressed using higher-level description comparing to Vulkan flags.
2. Functions that allocate memory blocks, reserve and return parts of them (`VkDeviceMemory` + offset + size) to the user. 2. Functions that allocate memory blocks, reserve and return parts of them (`VkDeviceMemory` + offset + size) to the user.
- Library keeps track of allocated memory blocks, used and unused ranges inside them, finds best matching unused ranges for new allocations, takes all the rules of alignment and buffer/image granularity into consideration. - Library keeps track of allocated memory blocks, used and unused ranges inside them, finds best matching unused ranges for new allocations, respects all the rules of alignment and buffer/image granularity.
3. Functions that can create an image/buffer, allocate memory for it and bind them together - all in one call. 3. Functions that can create an image/buffer, allocate memory for it and bind them together - all in one call.
Additional features: Additional features:
- Well-documented - description of all functions and structures provided, along with chapters that contain general description and example code.
- Thread-safety: Library is designed to be used by multithreaded code. - Thread-safety: Library is designed to be used by multithreaded code.
- Configuration: Fill optional members of CreateInfo structure to provide custom CPU memory allocator and other parameters. - Configuration: Fill optional members of CreateInfo structure to provide custom CPU memory allocator, pointers to Vulkan functions and other parameters.
- Customization: Predefine appropriate macros to provide your own implementation of all external facilities used by the library, from assert, mutex, and atomic, to vector and linked list. - Customization: Predefine appropriate macros to provide your own implementation of all external facilities used by the library, from assert, mutex, and atomic, to vector and linked list.
- Support memory mapping, reference-counted internally. Support for persistently mapped memory: Just allocate with appropriate flag and you get access to mapped pointer. - Support for memory mapping, reference-counted internally. Support for persistently mapped memory: Just allocate with appropriate flag and you get access to mapped pointer.
- Custom memory pools: Create a pool with desired parameters (e.g. fixed or limited maximum size) and allocate memory out of it. - Custom memory pools: Create a pool with desired parameters (e.g. fixed or limited maximum size) and allocate memory out of it.
- Support for VK_KHR_dedicated_allocation extension: Enable it and it will be used automatically by the library. - Support for VK_KHR_dedicated_allocation extension: Just enable it and it will be used automatically by the library.
- Defragmentation: Call one function and let the library move data around to free some memory blocks and make your allocations better compacted. - Defragmentation: Call one function and let the library move data around to free some memory blocks and make your allocations better compacted.
- Lost allocations: Allocate memory with appropriate flags and let the library remove allocations that are not used for many frames to make room for new ones. - Lost allocations: Allocate memory with appropriate flags and let the library remove allocations that are not used for many frames to make room for new ones.
- Statistics: Obtain detailed statistics about the amount of memory used, unused, number of allocated blocks, number of allocations etc. - globally, per memory heap, and per memory type. - Statistics: Obtain detailed statistics about the amount of memory used, unused, number of allocated blocks, number of allocations etc. - globally, per memory heap, and per memory type.
@ -52,9 +53,9 @@ Additional features:
- Self-contained C++ library in single header file. No external dependencies other than standard C and C++ library and of course Vulkan. - Self-contained C++ library in single header file. No external dependencies other than standard C and C++ library and of course Vulkan.
- Public interface in C, in same convention as Vulkan API. Implementation in C++. - Public interface in C, in same convention as Vulkan API. Implementation in C++.
- Interface documented using Doxygen-style comments.
- Platform-independent, but developed and tested on Windows using Visual Studio.
- Error handling implemented by returning `VkResult` error codes - same way as in Vulkan. - Error handling implemented by returning `VkResult` error codes - same way as in Vulkan.
- Interface documented using Doxygen-style comments.
- Platform-independent, but developed and tested on Windows using Visual Studio. Continuous integration setup for Windows and Linux. Tested also on Android and MacOS.
# Example # Example
@ -79,7 +80,7 @@ With this one function call:
2. `VkDeviceMemory` block is allocated if needed. 2. `VkDeviceMemory` block is allocated if needed.
3. An unused region of the memory block is bound to this buffer. 3. An unused region of the memory block is bound to this buffer.
`VmaAllocation` is an object that represents memory assigned to this buffer. It can be queried for parameters useful e.g. if you want to map the memory on host. `VmaAllocation` is an object that represents memory assigned to this buffer. It can be queried for parameters like Vulkan memory handle and offset.
# Read more # Read more
@ -87,12 +88,12 @@ See **[Documentation](https://gpuopen-librariesandsdks.github.io/VulkanMemoryAll
# Software using this library # Software using this library
- **[Anvil](https://github.com/GPUOpen-LibrariesAndSDKs/Anvil)** - cross-platform framework for Vulkan - **[Anvil](https://github.com/GPUOpen-LibrariesAndSDKs/Anvil)** - cross-platform framework for Vulkan. License: MIT.
- **[vkDOOM3](https://github.com/DustinHLand/vkDOOM3)** - Vulkan port of GPL DOOM 3 BFG Edition - **[vkDOOM3](https://github.com/DustinHLand/vkDOOM3)** - Vulkan port of GPL DOOM 3 BFG Edition. License: GNU GPL.
- **[Lightweight Java Game Library (LWJGL)](https://www.lwjgl.org/)** - includes binding of the library for Java - **[Lightweight Java Game Library (LWJGL)](https://www.lwjgl.org/)** - includes binding of the library for Java. License: BSD.
# See also # See also
- **[Awesome Vulkan](https://github.com/vinjn/awesome-vulkan)** - a curated list of awesome Vulkan libraries, debuggers and resources. - **[Awesome Vulkan](https://github.com/vinjn/awesome-vulkan)** - a curated list of awesome Vulkan libraries, debuggers and resources.
- **[PyVMA](https://github.com/realitix/pyvma)** - Python wrapper for this library. Author: Jean-Sébastien B. (@realitix). License: Apache 2.0. - **[PyVMA](https://github.com/realitix/pyvma)** - Python wrapper for this library. Author: Jean-Sébastien B. (@realitix). License: Apache 2.0.
- **[vulkan-malloc](https://github.com/dylanede/vulkan-malloc)** - Vulkan memory allocation library for Rust. Based on version 1 of this library. Author: Dylan Ede (@dylanede). License: MIT / Apache 2.0. - **[vulkan-malloc](https://github.com/dylanede/vulkan-malloc)** - Vulkan memory allocation library for Rust. Based on version 1 of this library. Author: Dylan Ede (@dylanede). License: MIT / Apache 2.0.