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Support 3D BC4 and BC5 compressed textures (#1655)

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* Support 3D BC4 and BC5 compressed textures

* PR feedback

* Fix some typos
This commit is contained in:
gdkchan 2020-11-01 15:32:53 -03:00 • committed by GitHub
parent 6222f173f0
commit 11a7c99764
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6 changed files with 357 additions and 32 deletions
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62
Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs
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@ -26,6 +26,68 @@ namespace Ryujinx.Graphics.Gpu.Image
Bc7
}
/// <summary>
/// Checks if a format is host incompatible.
/// </summary>
/// <remarks>
/// Host incompatible formats can't be used directly, the texture data needs to be converted
/// to a compatible format first.
/// </remarks>
/// <param name="info">Texture information</param>
/// <param name="caps">Host GPU capabilities</param>
/// <returns>True if the format is incompatible, false otherwise</returns>
public static bool IsFormatHostIncompatible(TextureInfo info, Capabilities caps)
{
Format originalFormat = info.FormatInfo.Format;
return ToHostCompatibleFormat(info, caps).Format != originalFormat;
}
/// <summary>
/// Converts a incompatible format to a host compatible format, or return the format directly
/// if it is already host compatible.
/// </summary>
/// <remarks>
/// This can be used to convert a incompatible compressed format to the decompressor
/// output format.
/// </remarks>
/// <param name="info">Texture information</param>
/// <param name="caps">Host GPU capabilities</param>
/// <returns>A host compatible format</returns>
public static FormatInfo ToHostCompatibleFormat(TextureInfo info, Capabilities caps)
{
if (!caps.SupportsAstcCompression)
{
if (info.FormatInfo.Format.IsAstcUnorm())
{
return new FormatInfo(Format.R8G8B8A8Unorm, 1, 1, 4, 4);
}
else if (info.FormatInfo.Format.IsAstcSrgb())
{
return new FormatInfo(Format.R8G8B8A8Srgb, 1, 1, 4, 4);
}
}
if (info.Target == Target.Texture3D)
{
// The host API does not support 3D BC4/BC5 compressed formats.
// We assume software decompression will be done for those textures,
// and so we adjust the format here to match the decompressor output.
switch (info.FormatInfo.Format)
{
case Format.Bc4Unorm:
return new FormatInfo(Format.R8Unorm, 1, 1, 1, 1);
case Format.Bc4Snorm:
return new FormatInfo(Format.R8Snorm, 1, 1, 1, 1);
case Format.Bc5Unorm:
return new FormatInfo(Format.R8G8Unorm, 1, 1, 2, 2);
case Format.Bc5Snorm:
return new FormatInfo(Format.R8G8Snorm, 1, 1, 2, 2);
}
}
return info.FormatInfo;
}
/// <summary>
/// Finds the appropriate depth format for a copy texture if the source texture has a depth format.
/// </summary>