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Work around rendering glitches with non-unity pixel scales.

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This commit is contained in:
Paul Chote
2021-05-11 19:29:50 +01:00
committed by reaperrr
parent 0d4b81fe6f
commit 84dff779ac
1 changed files with 9 additions and 4 deletions
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13
OpenRA.Game/Graphics/Sprite.cs
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@@ -41,10 +41,15 @@ namespace OpenRA.Graphics
FractionalOffset = Size.Z != 0 ? offset / Size :
new float3(offset.X / Size.X, offset.Y / Size.Y, 0);
Left = (float)Math.Min(bounds.Left, bounds.Right) / sheet.Size.Width;
Top = (float)Math.Min(bounds.Top, bounds.Bottom) / sheet.Size.Height;
Right = (float)Math.Max(bounds.Left, bounds.Right) / sheet.Size.Width;
Bottom = (float)Math.Max(bounds.Top, bounds.Bottom) / sheet.Size.Height;
// Some GPUs suffer from precision issues when rendering into non 1:1 framebuffers that result
// in rendering a line of texels that sample outside the sprite rectangle.
// Insetting the texture coordinates by a small fraction of a pixel avoids this
// with negligible impact on the 1:1 rendering case.
var inset = 1 / 128f;
Left = (Math.Min(bounds.Left, bounds.Right) + inset) / sheet.Size.Width;
Top = (Math.Min(bounds.Top, bounds.Bottom) + inset) / sheet.Size.Height;
Right = (Math.Max(bounds.Left, bounds.Right) - inset) / sheet.Size.Width;
Bottom = (Math.Max(bounds.Top, bounds.Bottom) - inset) / sheet.Size.Height;
}
}