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Implement a software ETC2 texture decoder (#4121)

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* Implement a software ETC2 texture decoder

* Fix output size calculation for non-2D textures

* Address PR feedback
This commit is contained in:
gdkchan 2022-12-21 20:39:58 -03:00 • committed by GitHub
parent 219f63ff4e
commit f906eb06c2
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GPG key ID: 4AEE18F83AFDEB23
8 changed files with 763 additions and 10 deletions
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32
Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs
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@ -67,6 +67,10 @@ namespace Ryujinx.Graphics.Gpu.Image
/// <returns>A host compatible format</returns>
public static FormatInfo ToHostCompatibleFormat(TextureInfo info, Capabilities caps)
{
// The host API does not support those compressed formats.
// We assume software decompression will be done for those textures,
// and so we adjust the format here to match the decompressor output.
if (!caps.SupportsAstcCompression)
{
if (info.FormatInfo.Format.IsAstcUnorm())
@ -83,16 +87,8 @@ namespace Ryujinx.Graphics.Gpu.Image
}
}
if (!caps.SupportsR4G4Format && info.FormatInfo.Format == Format.R4G4Unorm)
{
return new FormatInfo(Format.R4G4B4A4Unorm, 1, 1, 2, 4);
}
if (!HostSupportsBcFormat(info.FormatInfo.Format, info.Target, caps))
{
// The host API does not this compressed format.
// 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.Bc1RgbaSrgb:
@ -119,6 +115,26 @@ namespace Ryujinx.Graphics.Gpu.Image
}
}
if (!caps.SupportsEtc2Compression)
{
switch (info.FormatInfo.Format)
{
case Format.Etc2RgbaSrgb:
case Format.Etc2RgbPtaSrgb:
case Format.Etc2RgbSrgb:
return new FormatInfo(Format.R8G8B8A8Srgb, 1, 1, 4, 4);
case Format.Etc2RgbaUnorm:
case Format.Etc2RgbPtaUnorm:
case Format.Etc2RgbUnorm:
return new FormatInfo(Format.R8G8B8A8Unorm, 1, 1, 4, 4);
}
}
if (!caps.SupportsR4G4Format && info.FormatInfo.Format == Format.R4G4Unorm)
{
return new FormatInfo(Format.R4G4B4A4Unorm, 1, 1, 2, 4);
}
return info.FormatInfo;
}