Scales render textures to support dynamic resolution if the target platform/graphics API supports it.
The ScalableBufferManager class handles the scaling of any render textures that you have marked as DynamicallyScalable when ResizeBuffers is called. All render textures marked as DynamicallyScalable are scaled by a width and height scale factor. The scale is controlled through a scale factor and not with a specific width and height value because even though render textures are of different sizes, they need to be scaled by a common factor.
The current implementation only supports discrete scale factors in the range of 0.05 and 1.0 in steps of 0.05 to be consistent across all platforms. Unity automatically selects the closest supported scale factors. You can access the selected scale factors using ScalableBufferManager.widthScaleFactor and ScalableBufferManager.heightScaleFactor.
The scaled dimensions are calculated as follows:
width = ceil(renderTexture.width * ScalableBufferManager.widthScaleFactor)
height = ceil(renderTexture.height * ScalableBufferManager.heightScaleFactor)
The render textures that you have marked as DynamicallyScalableExplicit are not scaled by a call to ResizeBuffers but by a call to RenderTexture.ApplyDynamicScale. Scaling is subject to the exact same process as ResizeBuffers.
| heightScaleFactor | Height scale factor to control dynamic resolution. |
| widthScaleFactor | Width scale factor to control dynamic resolution. |
| ResizeBuffers | Function to resize all buffers marked as DynamicallyScalable. |