EEMetalPixelViewer
This is a set of Swift classes for iOS that are used for efficient presentation of pixel buffers on the screen, using Metal. This includes support for a myriad of pixel formats, including both planar and packed image data, as well as support for efficiently presenting Core Video CVImageBuffer images.
The base class, EETextureViewer, is a UIView, deriving from MTKView, which makes it super easy to get going and requires absolutely no dealing with Metal, writing shaders, etc.
Key Features
- Easy to use,
MTKView-based UIView object - Flexible support for a massive set of pixel formats, including both RGB and YUV, as well as planar and packed formats
- Support for the
UIViewUIContentModesettings for easy control of scaling and positioining of your pixel data within theUIView - Support for
CVImageBufferimages as an input, for working with video, camera sources, etc. - Optimized implementation with little to no CPU usage, no copied buffers, etc. All format conversions and such are done in the GPU.
Supported Pixel Formats
| Pixel Format | Supported | BPP | Planes |
|---|---|---|---|
| kCVPixelFormatType_420YpCbCr8Planar | ✅ | 16 | 3 |
| kCVPixelFormatType_420YpCbCr8PlanarFullRange | ✅ | 16 | 3 |
| kCVPixelFormatType_422YpCbCr8 | ✅ | 16 | 1 |
| kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange | ✅ | 16 | 2 |
| kCVPixelFormatType_420YpCbCr8BiPlanarFullRange | ✅ | 16 | 2 |
| kCVPixelFormatType_444YpCbCr8 | ✅ | 24 | 1 |
| kCVPixelFormatType_4444YpCbCrA8 | ✅ | 32 | 1 |
| kCVPixelFormatType_4444AYpCbCr8 | ✅ | 32 | 1 |
| kCVPixelFormatType_24RGB | ✅ | 24 | 1 |
| kCVPixelFormatType_24BGR | ✅ | 24 | 1 |
| kCVPixelFormatType_32ARGB | ✅ | 32 | 1 |
| kCVPixelFormatType_32BGRA | ✅ | 32 | 1 |
| kCVPixelFormatType_32ABGR | ✅ | 32 | 1 |
| kCVPixelFormatType_32RGBA | ✅ | 32 | 1 |
| kCVPixelFormatType_16LE555 | ✅ | 16 | 1 |
| kCVPixelFormatType_16LE5551 | ✅ | 16 | 1 |
| kCVPixelFormatType_16LE565 | ✅ | 16 | 1 |