mirror of
https://github.com/Facepunch/sbox-public.git
synced 2026-04-20 14:28:17 -04:00
a582fd6f7a
New UI rendering that groups multiple panels to be grouped into a single draw call when possible. New custom rendering API for custom panels using `Panel.Draw.XX` to emit drawing commands.
79 lines
2.1 KiB
C#
79 lines
2.1 KiB
C#
namespace Sandbox.UI;
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internal partial class PanelRenderer
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{
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internal void BuildDescriptors( Panel panel, RenderState state )
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{
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if ( panel?.ComputedStyle == null || !panel.IsVisible )
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return;
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BuildTransformState( panel );
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UpdateScissorState( panel );
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var renderMode = PushRenderMode( panel );
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panel.CachedOverrideBlendMode = OverrideBlendMode;
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panel.UpdateLayer( panel.ComputedStyle );
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UpdateBackgroundImageState( panel );
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// Accumulate CSS opacity into state so children inherit it
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// without depending on layout having updated panel.Opacity.
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state = state with { RenderOpacity = state.RenderOpacity * (panel.ComputedStyle?.Opacity ?? 1.0f) };
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if ( MathF.Abs( panel.CachedRenderOpacity - state.RenderOpacity ) > 0.001f )
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{
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panel.CachedRenderOpacity = state.RenderOpacity;
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panel.IsRenderDirty = true;
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}
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if ( panel.IsRenderDirty || panel.HasPanelLayer )
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{
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panel.CachedDescriptors ??= RenderLayer.Rent();
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RebuildDescriptors( panel, ref state );
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}
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panel.CachedRenderMode = GetRenderMode( panel );
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if ( panel.HasChildren )
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panel.BuildDescriptorsForChildren( this, ref state );
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if ( panel.HasPanelLayer )
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panel.BuildLayerPopCommands( this, DefaultRenderTarget );
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if ( renderMode ) PopRenderMode();
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}
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Panel.RenderMode GetRenderMode( Panel panel )
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{
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if ( panel.HasPanelLayer )
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return Panel.RenderMode.Layer;
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if ( panel.HasBackdropFilter ) return Panel.RenderMode.Inline;
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if ( panel is ScenePanel ) return Panel.RenderMode.Inline;
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if ( panel is BasePopup ) return Panel.RenderMode.Inline;
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return Panel.RenderMode.Batched;
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}
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void UpdateScissorState( Panel panel )
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{
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var hash = HashCode.Combine( ScissorGPU.Rect, ScissorGPU.CornerRadius, ScissorGPU.Matrix );
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if ( panel._lastScissorHash == hash ) return;
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panel._lastScissorHash = hash;
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panel.CachedDescriptors ??= new();
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panel.CachedDescriptors.Scissor = ScissorGPU;
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}
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void UpdateBackgroundImageState( Panel panel )
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{
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if ( panel.ComputedStyle?.BackgroundImage is not { } tex )
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return;
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if ( tex.IsDirty )
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panel.IsRenderDirty = true;
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tex.MarkUsed();
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}
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}
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