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Wojtek Figat
251
Source/Editor/Viewport/Previews/CubeTexturePreview.cs
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251
Source/Editor/Viewport/Previews/CubeTexturePreview.cs
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// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
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using FlaxEditor.GUI.ContextMenu;
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using FlaxEditor.Viewport.Widgets;
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using FlaxEngine;
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using FlaxEngine.GUI;
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namespace FlaxEditor.Viewport.Previews
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{
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/// <summary>
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/// Cube Texture asset preview editor viewport.
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/// </summary>
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/// <seealso cref="FlaxEditor.Viewport.Previews.MaterialPreview" />
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public class CubeTexturePreview : MaterialPreview
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{
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private ChannelFlags _channelFlags = ChannelFlags.All;
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private bool _usePointSampler = false;
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private float _mipLevel = -1;
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private ContextMenu _mipWidgetMenu;
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private ContextMenuButton _filterWidgetPointButton;
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private ContextMenuButton _filterWidgetLinearButton;
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/// <summary>
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/// The preview material instance used to draw texture.
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/// </summary>
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protected MaterialInstance _previewMaterial;
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/// <summary>
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/// Sets the cube texture to preview.
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/// </summary>
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/// <value>
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/// The cube texture.
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/// </value>
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public CubeTexture CubeTexture
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{
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set
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{
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// Prepare material and assign texture asset as a parameter
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if (_previewMaterial == null || _previewMaterial.WaitForLoaded())
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{
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// Error
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Editor.LogError("Cannot load preview material.");
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return;
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}
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var baseMaterial = _previewMaterial.BaseMaterial;
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if (baseMaterial == null || baseMaterial.WaitForLoaded())
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{
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// Error
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Editor.LogError("Cannot load base material for preview material.");
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return;
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}
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_previewMaterial.SetParameterValue("CubeTexture", value);
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}
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}
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/// <summary>
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/// Gets or sets the view channels to show.
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/// </summary>
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public ChannelFlags ViewChannels
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{
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get => _channelFlags;
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set
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{
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if (_channelFlags != value)
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{
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_channelFlags = value;
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UpdateMask();
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}
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}
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}
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/// <summary>
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/// Gets or sets a value indicating whether use point sampler when drawing the texture. The default value is false.
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/// </summary>
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public bool UsePointSampler
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{
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get => _usePointSampler;
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set
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{
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if (_usePointSampler != value)
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{
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_usePointSampler = value;
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_previewMaterial.SetParameterValue("PointSampler", value);
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}
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}
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}
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/// <summary>
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/// Gets or sets the mip level to show. The default value is -1.
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/// </summary>
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public float MipLevel
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{
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get => _mipLevel;
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set
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{
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if (!Mathf.NearEqual(_mipLevel, value))
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{
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_mipLevel = value;
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_previewMaterial.SetParameterValue("Mip", value);
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}
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}
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}
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/// <inheritdoc />
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public CubeTexturePreview(bool useWidgets)
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: base(useWidgets)
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{
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// Create virtual material material
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_previewMaterial = FlaxEngine.Content.CreateVirtualAsset<MaterialInstance>();
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if (_previewMaterial != null)
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_previewMaterial.BaseMaterial = FlaxEngine.Content.LoadAsyncInternal<Material>("Editor/CubeTexturePreviewMaterial");
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// Add widgets
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if (useWidgets)
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{
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// Channels widget
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var channelsWidget = new ViewportWidgetsContainer(ViewportWidgetLocation.UpperLeft);
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//
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var channelR = new ViewportWidgetButton("R", SpriteHandle.Invalid, null, true)
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{
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Checked = true,
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TooltipText = "Show/hide texture red channel",
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Parent = channelsWidget
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};
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channelR.Toggled += button => ViewChannels = button.Checked ? ViewChannels | ChannelFlags.Red : (ViewChannels & ~ChannelFlags.Red);
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var channelG = new ViewportWidgetButton("G", SpriteHandle.Invalid, null, true)
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{
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Checked = true,
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TooltipText = "Show/hide texture green channel",
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Parent = channelsWidget
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};
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channelG.Toggled += button => ViewChannels = button.Checked ? ViewChannels | ChannelFlags.Green : (ViewChannels & ~ChannelFlags.Green);
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var channelB = new ViewportWidgetButton("B", SpriteHandle.Invalid, null, true)
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{
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Checked = true,
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TooltipText = "Show/hide texture blue channel",
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Parent = channelsWidget
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};
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channelB.Toggled += button => ViewChannels = button.Checked ? ViewChannels | ChannelFlags.Blue : (ViewChannels & ~ChannelFlags.Blue);
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var channelA = new ViewportWidgetButton("A", SpriteHandle.Invalid, null, true)
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{
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Checked = true,
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TooltipText = "Show/hide texture alpha channel",
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Parent = channelsWidget
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};
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channelA.Toggled += button => ViewChannels = button.Checked ? ViewChannels | ChannelFlags.Alpha : (ViewChannels & ~ChannelFlags.Alpha);
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//
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channelsWidget.Parent = this;
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// Mip widget
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var mipWidget = new ViewportWidgetsContainer(ViewportWidgetLocation.UpperLeft);
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_mipWidgetMenu = new ContextMenu();
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_mipWidgetMenu.VisibleChanged += OnMipWidgetMenuOnVisibleChanged;
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var mipWidgetButton = new ViewportWidgetButton("Mip", SpriteHandle.Invalid, _mipWidgetMenu)
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{
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TooltipText = "The mip level to show. The default is -1.",
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Parent = mipWidget
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};
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//
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mipWidget.Parent = this;
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// Filter widget
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var filterWidget = new ViewportWidgetsContainer(ViewportWidgetLocation.UpperLeft);
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var filterWidgetMenu = new ContextMenu();
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filterWidgetMenu.VisibleChanged += OnFilterWidgetMenuVisibleChanged;
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_filterWidgetPointButton = filterWidgetMenu.AddButton("Point", () => UsePointSampler = true);
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_filterWidgetLinearButton = filterWidgetMenu.AddButton("Linear", () => UsePointSampler = false);
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var filterWidgetButton = new ViewportWidgetButton("Filter", SpriteHandle.Invalid, filterWidgetMenu)
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{
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TooltipText = "The texture preview filtering mode. The default is Linear.",
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Parent = filterWidget
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};
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//
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filterWidget.Parent = this;
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}
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// Link it
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Material = _previewMaterial;
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}
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private void OnFilterWidgetMenuVisibleChanged(Control control)
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{
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if (!control.Visible)
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return;
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_filterWidgetPointButton.Checked = UsePointSampler;
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_filterWidgetLinearButton.Checked = !UsePointSampler;
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}
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private void OnMipWidgetMenuOnVisibleChanged(Control control)
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{
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if (!control.Visible)
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return;
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var textureObj = _previewMaterial.GetParameterValue("CubeTexture");
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if (textureObj is TextureBase texture && !texture.WaitForLoaded())
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{
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_mipWidgetMenu.ItemsContainer.DisposeChildren();
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var mipLevels = texture.MipLevels;
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for (int i = -1; i < mipLevels; i++)
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{
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var button = _mipWidgetMenu.AddButton(i.ToString(), OnMipWidgetClicked);
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button.Tag = i;
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button.Checked = Mathf.Abs(MipLevel - i) < 0.9f;
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}
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}
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}
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private void OnMipWidgetClicked(ContextMenuButton button)
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{
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MipLevel = (int)button.Tag;
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}
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private void UpdateMask()
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{
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Vector4 mask = Vector4.One;
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if ((_channelFlags & ChannelFlags.Red) == 0)
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mask.X = 0;
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if ((_channelFlags & ChannelFlags.Green) == 0)
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mask.Y = 0;
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if ((_channelFlags & ChannelFlags.Blue) == 0)
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mask.Z = 0;
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if ((_channelFlags & ChannelFlags.Alpha) == 0)
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mask.W = 0;
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_previewMaterial.SetParameterValue("Mask", mask);
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}
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/// <inheritdoc />
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protected override void PerformLayoutBeforeChildren()
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{
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base.PerformLayoutBeforeChildren();
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ViewportWidgetsContainer.ArrangeWidgets(this);
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}
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/// <inheritdoc />
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public override bool HasLoadedAssets => base.HasLoadedAssets && _previewMaterial.IsLoaded && _previewMaterial.BaseMaterial.IsLoaded;
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/// <inheritdoc />
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public override void OnDestroy()
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{
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Material = null;
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Object.Destroy(ref _previewMaterial);
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base.OnDestroy();
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}
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}
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}
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