//////////////////////////////////////////////////////
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// MK Glow RenderContext //
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// //
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// Created by Michael Kremmel //
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// www.michaelkremmel.de //
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// Copyright © 2020 All rights reserved. //
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//////////////////////////////////////////////////////
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using UnityEngine;
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namespace MK.Glow
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{
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#if UNITY_2018_3_OR_NEWER
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#if ENABLE_VR
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using XRSettings = UnityEngine.XR.XRSettings;
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#endif
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#endif
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internal sealed class RenderContext : IDimension
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{
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#if UNITY_2017_1_OR_NEWER
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private RenderTextureDescriptor _descriptor;
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public RenderTextureDescriptor descriptor { get{ return _descriptor; } }
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public RenderDimension renderDimension { get{ return new RenderDimension(_descriptor.width, _descriptor.height); } }
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#else
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private RenderDimension _descriptor;
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public RenderDimension descriptor { get{ return _descriptor; } }
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public RenderDimension renderDimension { get{ return _descriptor; } }
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#endif
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public int width { get{ return _descriptor.width; } }
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public int height { get{ return _descriptor.height; } }
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/// <summary>
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/// Create the rendercontext based on XR settings
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/// </summary>
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internal RenderContext()
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{
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#if UNITY_2018_3_OR_NEWER
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#if ENABLE_VR
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_descriptor = XRSettings.enabled ? XRSettings.eyeTextureDesc : new RenderTextureDescriptor();
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#else
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_descriptor = new RenderTextureDescriptor();
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#endif
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_descriptor.msaaSamples = 1;
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_descriptor.useMipMap = false;
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_descriptor.autoGenerateMips = false;
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_descriptor.shadowSamplingMode = UnityEngine.Rendering.ShadowSamplingMode.None;
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#elif UNITY_2017_1_OR_NEWER
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_descriptor = new RenderTextureDescriptor();
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_descriptor.msaaSamples = 1;
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_descriptor.useMipMap = false;
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_descriptor.autoGenerateMips = false;
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#else
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_descriptor = new RenderDimension(0, 0);
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#endif
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#if UNITY_2019_2_OR_NEWER
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_descriptor.mipCount = 1;
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#endif
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}
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/// <summary>
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/// Doublewide the dimension if single pass stereo is enabled
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/// </summary>
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/// <param name="stereoEnabled"></param>
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internal void SinglePassStereoAdjustWidth(bool stereoEnabled)
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{
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_descriptor.width = stereoEnabled && PipelineProperties.singlePassStereoDoubleWideEnabled ? _descriptor.width * 2 : _descriptor.width;
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}
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/// <summary>
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/// Update a render context based on rendering settings including xr
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/// </summary>
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/// <param name="camera"></param>
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/// <param name="format"></param>
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/// <param name="depthBufferBits"></param>
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/// <param name="dimension"></param>
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internal void UpdateRenderContext(MK.Glow.ICameraData cameraData, RenderTextureFormat format, int depthBufferBits, RenderDimension dimension)
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{
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if(cameraData.GetOverwriteDescriptor())
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{
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_descriptor.dimension = cameraData.GetOverwriteDimension();
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#if ENABLE_VR
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_descriptor.vrUsage = cameraData.GetStereoEnabled() ? XRSettings.eyeTextureDesc.vrUsage : VRTextureUsage.None;
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#else
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_descriptor.vrUsage = VRTextureUsage.None;
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#endif
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_descriptor.volumeDepth = cameraData.GetOverwriteVolumeDepth();
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}
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else
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{
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#if UNITY_2018_3_OR_NEWER
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#if ENABLE_VR
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_descriptor.dimension = cameraData.GetStereoEnabled() && !cameraData.GetTargetTexture() ? UnityEngine.XR.XRSettings.eyeTextureDesc.dimension : UnityEngine.Rendering.TextureDimension.Tex2D;
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_descriptor.vrUsage = cameraData.GetStereoEnabled() && !cameraData.GetTargetTexture() ? UnityEngine.XR.XRSettings.eyeTextureDesc.vrUsage : VRTextureUsage.None;
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_descriptor.volumeDepth = cameraData.GetStereoEnabled() && !cameraData.GetTargetTexture() ? UnityEngine.XR.XRSettings.eyeTextureDesc.volumeDepth : 1;
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#else
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_descriptor.dimension = UnityEngine.Rendering.TextureDimension.Tex2D;
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_descriptor.vrUsage = VRTextureUsage.None;
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_descriptor.volumeDepth = 1;
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#endif
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#elif UNITY_2017_1_OR_NEWER
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_descriptor.dimension = UnityEngine.Rendering.TextureDimension.Tex2D;
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_descriptor.vrUsage = VRTextureUsage.None;
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_descriptor.volumeDepth = 1;
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#endif
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}
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#if UNITY_2017_1_OR_NEWER
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_descriptor.colorFormat = format;
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_descriptor.depthBufferBits = depthBufferBits;
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_descriptor.width = dimension.width;
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_descriptor.height = dimension.height;
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_descriptor.memoryless = RenderTextureMemoryless.None;
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_descriptor.sRGB = RenderTextureReadWrite.Default != RenderTextureReadWrite.Linear;
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#else
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_descriptor.width = dimension.width;
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_descriptor.height = dimension.height;
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#endif
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_descriptor.depthBufferBits = 16;
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}
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}
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}
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