Init
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#if XR_COMPOSITION_LAYERS
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using Unity.XR.CompositionLayers;
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using Unity.XR.CompositionLayers.Extensions;
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using Unity.XR.CompositionLayers.Layers;
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using Unity.XR.CompositionLayers.Services;
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using UnityEngine;
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namespace Unity.XR.PXR
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{
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internal class PXR_CylinderLayer : PXR_CustomLayerHandler<XrCompositionLayerCylinderKHR>
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{
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float savedDelta;
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bool layerDataChanged = false;
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struct CylinderLayerSize
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{
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public float radius;
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public float centralAngle;
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public float aspectRatio;
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public static implicit operator CylinderLayerSize(Vector3 v) => new CylinderLayerSize
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{
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radius = v.x,
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centralAngle = v.y,
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aspectRatio = v.z
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};
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}
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protected override bool CreateSwapchain(CompositionLayerManager.LayerInfo layer, out SwapchainCreateInfo swapchainCreateInfo)
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{
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if (layer.Layer == null)
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{
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swapchainCreateInfo = default;
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return false;
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}
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unsafe
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{
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var texturesExtension = layer.Layer.GetComponent<TexturesExtension>();
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if (texturesExtension == null || texturesExtension.enabled == false)
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{
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swapchainCreateInfo = default;
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return false;
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}
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switch (texturesExtension.sourceTexture)
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{
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case TexturesExtension.SourceTextureEnum.LocalTexture:
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{
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if (texturesExtension.LeftTexture == null)
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goto default;
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var xrCreateInfo = new XrSwapchainCreateInfo()
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{
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Type = (uint)XrStructureType.XR_TYPE_SWAPCHAIN_CREATE_INFO,
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Next = PXR_LayerUtility.GetExtensionsChain(layer, CompositionLayerExtension.ExtensionTarget.Swapchain),
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CreateFlags = 0,
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UsageFlags = (ulong)(XrSwapchainUsageFlags.XR_SWAPCHAIN_USAGE_SAMPLED_BIT | XrSwapchainUsageFlags.XR_SWAPCHAIN_USAGE_COLOR_ATTACHMENT_BIT),
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Format = PXR_LayerUtility.GetDefaultColorFormat(),
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SampleCount = 1,
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Width = (uint)texturesExtension.LeftTexture.width,
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Height = (uint)texturesExtension.LeftTexture.height,
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FaceCount = 1,
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ArraySize = 1,
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MipCount = (uint)texturesExtension.LeftTexture.mipmapCount,
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};
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swapchainCreateInfo = new SwapchainCreateInfo(xrCreateInfo, isExternalSurface: false);
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return true;
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}
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case TexturesExtension.SourceTextureEnum.AndroidSurface:
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{
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#if UNITY_ANDROID
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var xrCreateInfo = new XrSwapchainCreateInfo()
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{
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Type = (uint)XrStructureType.XR_TYPE_SWAPCHAIN_CREATE_INFO,
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Next = PXR_LayerUtility.GetExtensionsChain(layer, CompositionLayerExtension.ExtensionTarget.Swapchain),
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CreateFlags = 0,
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UsageFlags = (ulong)(XrSwapchainUsageFlags.XR_SWAPCHAIN_USAGE_SAMPLED_BIT | XrSwapchainUsageFlags.XR_SWAPCHAIN_USAGE_COLOR_ATTACHMENT_BIT),
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Format = 0,
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SampleCount = 0,
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Width = (uint)texturesExtension.Resolution.x,
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Height = (uint)texturesExtension.Resolution.y,
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FaceCount = 0,
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ArraySize = 0,
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MipCount = 0,
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};
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swapchainCreateInfo = new SwapchainCreateInfo(xrCreateInfo, isExternalSurface: true);
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return true;
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#else
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goto default;
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#endif
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}
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default:
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swapchainCreateInfo = default;
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return false;
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}
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}
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}
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protected override bool CreateNativeLayer(CompositionLayerManager.LayerInfo layer, SwapchainCreatedOutput swapchainOutput, out XrCompositionLayerCylinderKHR nativeLayer)
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{
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unsafe
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{
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var data = layer.Layer.LayerData as CylinderLayerData;
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var transform = layer.Layer.GetComponent<Transform>();
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var texturesExtension = layer.Layer.GetComponent<TexturesExtension>();
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int subImageWidth = 0;
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int subImageHeight = 0;
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switch (texturesExtension.sourceTexture)
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{
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case TexturesExtension.SourceTextureEnum.LocalTexture:
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{
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if (texturesExtension.LeftTexture != null)
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{
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subImageWidth = texturesExtension.LeftTexture.width;
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subImageHeight = texturesExtension.LeftTexture.height;
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}
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break;
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}
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case TexturesExtension.SourceTextureEnum.AndroidSurface:
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{
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subImageWidth = (int)texturesExtension.Resolution.x;
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subImageHeight = (int)texturesExtension.Resolution.y;
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break;
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}
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}
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CylinderLayerSize scaledSize = data.GetScaledSize(transform.lossyScale);
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if (texturesExtension.CropToAspect)
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{
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scaledSize = FixAspectRatio(data, scaledSize, subImageWidth, subImageHeight);
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}
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nativeLayer = new XrCompositionLayerCylinderKHR()
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{
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Type = (uint)XrStructureType.XR_TYPE_COMPOSITION_LAYER_CYLINDER_KHR,
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Next = PXR_LayerUtility.GetExtensionsChain(layer, CompositionLayerExtension.ExtensionTarget.Layer),
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LayerFlags = data.BlendType == BlendType.Premultiply ? XrCompositionLayerFlags.SourceAlpha : XrCompositionLayerFlags.SourceAlpha | XrCompositionLayerFlags.UnPremultipliedAlpha,
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Space = PXR_LayerUtility.GetCurrentAppSpace(),
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EyeVisibility = 0,
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SubImage = new XrSwapchainSubImage()
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{
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Swapchain = swapchainOutput.handle,
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ImageRect = new XrRect2Di()
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{
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Offset = new XrOffset2Di() { X = 0, Y = 0 },
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Extent = new XrExtent2Di()
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{
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Width = subImageWidth,
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Height = subImageHeight
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}
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},
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ImageArrayIndex = 0
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},
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Pose = new XrPosef(PXR_Utility.ComputePoseToWorldSpace(transform, CompositionLayerManager.mainCameraCache).position, PXR_Utility.ComputePoseToWorldSpace(transform, CompositionLayerManager.mainCameraCache).rotation),
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Radius = data.ApplyTransformScale ? scaledSize.radius : data.Radius,
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CentralAngle = data.ApplyTransformScale ? scaledSize.centralAngle : data.CentralAngle,
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AspectRatio = data.ApplyTransformScale ? scaledSize.aspectRatio : data.AspectRatio,
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};
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layerDataChanged = true;
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return true;
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}
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}
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protected override bool ModifyNativeLayer(CompositionLayerManager.LayerInfo layerInfo, ref XrCompositionLayerCylinderKHR nativeLayer)
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{
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var texturesExtension = layerInfo.Layer.GetComponent<TexturesExtension>();
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if (texturesExtension == null || texturesExtension.enabled == false)
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return false;
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var data = layerInfo.Layer.LayerData as CylinderLayerData;
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GetSubImageDimensions(out int subImageWidth, out int subImageHeight, texturesExtension);
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nativeLayer.SubImage.ImageRect.Extent = new XrExtent2Di()
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{
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Width = subImageWidth,
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Height = subImageHeight
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};
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var transform = layerInfo.Layer.GetComponent<Transform>();
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CylinderLayerSize scaledSize = data.GetScaledSize(transform.lossyScale);
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if (texturesExtension.CropToAspect)
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{
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scaledSize = FixAspectRatio(data, scaledSize, subImageWidth, subImageHeight);
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}
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nativeLayer.Radius = data.ApplyTransformScale ? scaledSize.radius : data.Radius;
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nativeLayer.CentralAngle = data.ApplyTransformScale ? scaledSize.centralAngle : data.CentralAngle;
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nativeLayer.AspectRatio = data.ApplyTransformScale ? scaledSize.aspectRatio : data.AspectRatio;
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unsafe
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{
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nativeLayer.Next = PXR_LayerUtility.GetExtensionsChain(layerInfo, CompositionLayerExtension.ExtensionTarget.Layer);
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}
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layerDataChanged = true;
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return true;
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}
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protected override bool ActiveNativeLayer(CompositionLayerManager.LayerInfo layerInfo, ref XrCompositionLayerCylinderKHR nativeLayer)
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{
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var texturesExtension = layerInfo.Layer.GetComponent<TexturesExtension>();
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if (texturesExtension == null || texturesExtension.enabled == false)
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return false;
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var transform = layerInfo.Layer.GetComponent<Transform>();
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// Special treatment for cylinder type based on destination rects.
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if (texturesExtension != null && texturesExtension.CustomRects)
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{
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var cylinderLayer = layerInfo.Layer.LayerData as CylinderLayerData;
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float rotationDelta = (texturesExtension.LeftEyeDestinationRect.x + (0.5f * texturesExtension.LeftEyeDestinationRect.width) - 0.5f) * cylinderLayer.CentralAngle / (float)System.Math.PI * 180.0f;
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if (rotationDelta != savedDelta)
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{
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Quaternion savedDeltaQuaternion = Quaternion.AngleAxis(savedDelta, Vector3.up);
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Quaternion deltaQuaternion = Quaternion.AngleAxis(rotationDelta, Vector3.up);
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Quaternion difference = deltaQuaternion * Quaternion.Inverse(savedDeltaQuaternion);
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savedDelta = rotationDelta;
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transform.rotation *= difference;
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}
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}
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nativeLayer.Pose = new XrPosef(PXR_Utility.ComputePoseToWorldSpace(transform, CompositionLayerManager.mainCameraCache).position, PXR_Utility.ComputePoseToWorldSpace(transform, CompositionLayerManager.mainCameraCache).rotation);
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nativeLayer.Space = PXR_LayerUtility.GetCurrentAppSpace();
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if (texturesExtension.CustomRects && layerDataChanged)
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{
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GetSubImageDimensions(out int subImageWidth, out int subImageHeight, texturesExtension);
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nativeLayer.SubImage.ImageRect = new XrRect2Di()
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{
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Offset = new XrOffset2Di()
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{
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X = (int)(subImageWidth * texturesExtension.LeftEyeSourceRect.x),
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Y = (int)(subImageHeight * texturesExtension.LeftEyeSourceRect.y)
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},
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Extent = new XrExtent2Di()
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{
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Width = (int)(subImageWidth * texturesExtension.LeftEyeSourceRect.width),
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Height = (int)(subImageHeight * texturesExtension.LeftEyeSourceRect.height)
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}
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};
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var currentPosition = PXR_Utility.ComputePoseToWorldSpace(transform, CompositionLayerManager.mainCameraCache).position;
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float cylinderHeight = nativeLayer.Radius * nativeLayer.CentralAngle / nativeLayer.AspectRatio;
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float transformedY = currentPosition.y + (((texturesExtension.LeftEyeDestinationRect.y + (0.5f * texturesExtension.LeftEyeDestinationRect.height) - 0.5f)) * (-1.0f * cylinderHeight));
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nativeLayer.Pose = new XrPosef(new Vector3(currentPosition.x, transformedY, currentPosition.z), PXR_Utility.ComputePoseToWorldSpace(transform, CompositionLayerManager.mainCameraCache).rotation);
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nativeLayer.CentralAngle = nativeLayer.CentralAngle * texturesExtension.LeftEyeDestinationRect.width;
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nativeLayer.AspectRatio = nativeLayer.AspectRatio * texturesExtension.LeftEyeDestinationRect.width / texturesExtension.LeftEyeDestinationRect.height;
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layerDataChanged = false;
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}
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return base.ActiveNativeLayer(layerInfo, ref nativeLayer);
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}
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static CylinderLayerSize FixAspectRatio(CylinderLayerData data, CylinderLayerSize scaledSize, int texWidth, int texHeight)
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{
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// because we're cropping and trying to maintain the same other parameters, we don't
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// need to consider data.MaintainAspectRatio here. That's mostly an editor concern, anyway.
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float texRatio = (float)texWidth / (float)texHeight;
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if (scaledSize.aspectRatio > texRatio)
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{
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// too wide
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float width = scaledSize.radius * scaledSize.centralAngle;
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float height = width / scaledSize.aspectRatio;
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scaledSize.centralAngle = height * texRatio / scaledSize.radius;
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scaledSize.aspectRatio = texRatio;
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}
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else if (scaledSize.aspectRatio < texRatio)
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{
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// too narrow
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scaledSize.aspectRatio = texRatio;
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}
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return scaledSize;
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}
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static void GetSubImageDimensions(out int width, out int height, TexturesExtension texturesExtension)
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{
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width = 0;
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height = 0;
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switch (texturesExtension.sourceTexture)
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{
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case TexturesExtension.SourceTextureEnum.LocalTexture:
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{
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if (texturesExtension.LeftTexture != null)
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{
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width = texturesExtension.LeftTexture.width;
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height = texturesExtension.LeftTexture.height;
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}
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break;
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}
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case TexturesExtension.SourceTextureEnum.AndroidSurface:
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{
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width = (int)texturesExtension.Resolution.x;
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height = (int)texturesExtension.Resolution.y;
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break;
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}
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}
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}
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}
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}
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#endif
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