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When a render method has nothing to render, eagerly return.

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By eagerly returning an empty enumerable in these cases, this avoids allocating an enumerable for the whole render method if nothing will be drawn.
This commit is contained in:
RoosterDragon
2020-10-11 11:57:22 +01:00
committed by abcdefg30
parent 87389d3051
commit 8d3cec5bea
3 changed files with 34 additions and 17 deletions
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35
OpenRA.Mods.Common/Traits/Render/DrawLineToTarget.cs
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@@ -63,17 +63,27 @@ namespace OpenRA.Mods.Common.Traits
ShowTargetLines(self);
}
IEnumerable<IRenderable> IRenderAboveShroud.RenderAboveShroud(Actor self, WorldRenderer wr)
bool ShouldRender(Actor self)
{
if (!self.Owner.IsAlliedWith(self.World.LocalPlayer) || Game.Settings.Game.TargetLines == TargetLinesType.Disabled)
yield break;
return false;
// Players want to see the lines when in waypoint mode.
var force = Game.GetModifierKeys().HasModifier(Modifiers.Shift) || self.World.OrderGenerator is ForceModifiersOrderGenerator;
if (Game.RunTime > lifetime && !force)
yield break;
return force || Game.RunTime <= lifetime;
}
IEnumerable<IRenderable> IRenderAboveShroud.RenderAboveShroud(Actor self, WorldRenderer wr)
{
if (!ShouldRender(self))
return Enumerable.Empty<IRenderable>();
return RenderAboveShroud(self, wr);
}
IEnumerable<IRenderable> RenderAboveShroud(Actor self, WorldRenderer wr)
{
var pal = wr.Palette(TileSet.TerrainPaletteInternalName);
var a = self.CurrentActivity;
for (; a != null; a = a.NextActivity)
@@ -87,13 +97,7 @@ namespace OpenRA.Mods.Common.Traits
IEnumerable<IRenderable> IRenderAnnotationsWhenSelected.RenderAnnotations(Actor self, WorldRenderer wr)
{
if (!self.Owner.IsAlliedWith(self.World.LocalPlayer) || Game.Settings.Game.TargetLines == TargetLinesType.Disabled)
return Enumerable.Empty<IRenderable>();
// Players want to see the lines when in waypoint mode.
var force = Game.GetModifierKeys().HasModifier(Modifiers.Shift) || self.World.OrderGenerator is ForceModifiersOrderGenerator;
if (Game.RunTime > lifetime && !force)
if (!ShouldRender(self))
return Enumerable.Empty<IRenderable>();
renderableCache.Clear();
@@ -108,8 +112,8 @@ namespace OpenRA.Mods.Common.Traits
{
if (n.Target.Type != TargetType.Invalid && n.Tile == null)
{
var lineWidth = renderableCache.Any() ? info.QueuedLineWidth : info.LineWidth;
var markerWidth = renderableCache.Any() ? info.QueuedMarkerWidth : info.MarkerWidth;
var lineWidth = renderableCache.Count > 0 ? info.QueuedLineWidth : info.LineWidth;
var markerWidth = renderableCache.Count > 0 ? info.QueuedMarkerWidth : info.MarkerWidth;
var pos = n.Target.CenterPosition;
renderableCache.Add(new TargetLineRenderable(new[] { prev, pos }, n.Color, lineWidth, markerWidth));
@@ -118,9 +122,12 @@ namespace OpenRA.Mods.Common.Traits
}
}
if (renderableCache.Count == 0)
return Enumerable.Empty<IRenderable>();
// Reverse draw order so target markers are drawn on top of the next line
renderableCache.Reverse();
return renderableCache;
return renderableCache.ToArray();
}
bool IRenderAnnotationsWhenSelected.SpatiallyPartitionable { get { return false; } }