VulkanMemoryAllocator/tools/GpuMemDumpVis/README.md

# GpuMemDumpVis

Vulkan/D3D12 Memory Allocator Dump Visualization. 
It is an auxiliary tool that can visualize internal state of [Vulkan Memory Allocator](https://github.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator) and
[D3D12 Memory Allocator](https://github.com/GPUOpen-LibrariesAndSDKs/D3D12MemoryAllocator) libraries on a picture.
It is a Python script that must be launched from command line with appropriate parameters.

## Requirements

- Python 3 installed
- [Pillow](http://python-pillow.org/) - Python Imaging Library (Fork) installed

## Usage

```
python GpuMemDumpVis.py -o OUTPUT_FILE INPUT_FILE
```

* `INPUT_FILE` - path to source file to be read, containing dump of internal state of the VMA/D3D12MA library in JSON format (encoding: UTF-8/UTF-16), generated using `vmaBuildStatsString()` and `D3D12MA::Allocator::BuildStatsString()` functions.
* `OUTPUT_FILE` - path to destination file to be written that will contain generated image. Image format is automatically recognized based on file extension. List of supported formats can be found [here](http://pillow.readthedocs.io/en/latest/handbook/image-file-formats.html) and includes: BMP, GIF, JPEG, PNG, TGA.

You can also use typical options:

* `-h` - to see help on command line syntax
* `-v` - to see program version number

## Example output

![Example output](README_files/ExampleOutput.png "Example output")

## Legend

* ![Free space](README_files/Legend_Bkg.png "Free space") Light gray without border - a space in Vulkan device memory block unused by any allocation.
* ![Buffer 1](README_files/Legend_Buffer_1.png "Buffer 1") Buffer with usage containing INDIRECT_BUFFER, VERTEX_BUFFER, or INDEX_BUFFER (Vulkan).
* ![Buffer 2](README_files/Legend_Buffer_2.png "Buffer 2") Buffer with usage containing STORAGE_BUFFER or STORAGE_TEXEL_BUFFER (Vulkan).
* ![Buffer 3](README_files/Legend_Buffer_3.png "Buffer 3") Buffer with usage containing UNIFORM_BUFFER or UNIFORM_TEXEL_BUFFER (Vulkan).
* ![Buffer 4](README_files/Legend_Buffer_4.png "Buffer 4") Other buffer.
* ![Image 1](README_files/Legend_Image_1.png "Image 1") Image with OPTIMAL tiling and usage containing DEPTH_STENCIL_ATTACHMENT (Vulkan) or a texture with usage containing D3D12_RESOURCE_FLAG_ALLOW_DEPTH_STENCIL (D3D12).
* ![Image 2](README_files/Legend_Image_2.png "Image 2") Image with OPTIMAL tiling and usage containing INPUT_ATTACHMENT, TRANSIENT_ATTACHMENT or COLOR_ATTACHMENT (Vulkan), or a texture with usage containing D3D12_RESOURCE_FLAG_ALLOW_RENDER_TARGET or D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS (D3D12).
* ![Image 3](README_files/Legend_Image_3.png "Image 3") Image with OPTIMAL tiling and usage containing SAMPLED (Vulkan) or a texture with usage not containing D3D12_RESOURCE_FLAG_DENY_SHARED_RESOURCE (D3D12).
* ![Image 4](README_files/Legend_Image_4.png "Image 4") Other image with OPTIMAL tiling (Vulkan) or a texture (D3D12).
* ![Image Linear](README_files/Legend_Image_Linear.png "Image Linear") Image with LINEAR tiling (Vulkan).
* ![Image Unknown](README_files/Legend_Image_Unknown.png "Image Unknown") Image with tiling unknown to the allocator (Vulkan).
* ![Unknown](README_files/Legend_Unknown.png "Unknown") Allocation of unknown type.
* ![Details](README_files/Legend_Details.png "Details") Black bar - one or more allocations of any kind too small to be visualized as filled rectangles.

## Additional notes

Warning! Current version of the tool shows incorrect result when allocations alias (overlap) in memory, as it only looks at sizes of the allocations, not their offsets.