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authorTSR Berry <20988865+TSRBerry@users.noreply.github.com>2023-04-08 01:22:00 +0200
committerMary <thog@protonmail.com>2023-04-27 23:51:14 +0200
commitcee712105850ac3385cd0091a923438167433f9f (patch)
tree4a5274b21d8b7f938c0d0ce18736d3f2993b11b1 /Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs
parentcd124bda587ef09668a971fa1cac1c3f0cfc9f21 (diff)
Move solution and projects to src
Diffstat (limited to 'Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs')
-rw-r--r--Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs911
1 files changed, 0 insertions, 911 deletions
diff --git a/Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs b/Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs
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-using Ryujinx.Common;
-using Ryujinx.Graphics.GAL;
-using Ryujinx.Graphics.Texture;
-using System;
-
-namespace Ryujinx.Graphics.Gpu.Image
-{
- /// <summary>
- /// Texture format compatibility checks.
- /// </summary>
- static class TextureCompatibility
- {
- private enum FormatClass
- {
- Unclassified,
- Bc1Rgba,
- Bc2,
- Bc3,
- Bc4,
- Bc5,
- Bc6,
- Bc7,
- Etc2Rgb,
- Etc2Rgba,
- Astc4x4,
- Astc5x4,
- Astc5x5,
- Astc6x5,
- Astc6x6,
- Astc8x5,
- Astc8x6,
- Astc8x8,
- Astc10x5,
- Astc10x6,
- Astc10x8,
- Astc10x10,
- Astc12x10,
- Astc12x12
- }
-
- /// <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)
- {
- // 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())
- {
- return GraphicsConfig.EnableTextureRecompression
- ? new FormatInfo(Format.Bc7Unorm, 4, 4, 16, 4)
- : new FormatInfo(Format.R8G8B8A8Unorm, 1, 1, 4, 4);
- }
- else if (info.FormatInfo.Format.IsAstcSrgb())
- {
- return GraphicsConfig.EnableTextureRecompression
- ? new FormatInfo(Format.Bc7Srgb, 4, 4, 16, 4)
- : new FormatInfo(Format.R8G8B8A8Srgb, 1, 1, 4, 4);
- }
- }
-
- if (!HostSupportsBcFormat(info.FormatInfo.Format, info.Target, caps))
- {
- switch (info.FormatInfo.Format)
- {
- case Format.Bc1RgbaSrgb:
- case Format.Bc2Srgb:
- case Format.Bc3Srgb:
- case Format.Bc7Srgb:
- return new FormatInfo(Format.R8G8B8A8Srgb, 1, 1, 4, 4);
- case Format.Bc1RgbaUnorm:
- case Format.Bc2Unorm:
- case Format.Bc3Unorm:
- case Format.Bc7Unorm:
- return new FormatInfo(Format.R8G8B8A8Unorm, 1, 1, 4, 4);
- 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);
- case Format.Bc6HSfloat:
- case Format.Bc6HUfloat:
- return new FormatInfo(Format.R16G16B16A16Float, 1, 1, 8, 4);
- }
- }
-
- 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)
- {
- if (caps.SupportsR4G4B4A4Format)
- {
- return new FormatInfo(Format.R4G4B4A4Unorm, 1, 1, 2, 4);
- }
- else
- {
- return new FormatInfo(Format.R8G8B8A8Unorm, 1, 1, 4, 4);
- }
- }
-
- if (info.FormatInfo.Format == Format.R4G4B4A4Unorm)
- {
- if (!caps.SupportsR4G4B4A4Format)
- {
- return new FormatInfo(Format.R8G8B8A8Unorm, 1, 1, 4, 4);
- }
- }
- else if (!caps.Supports5BitComponentFormat && info.FormatInfo.Format.Is16BitPacked())
- {
- return new FormatInfo(info.FormatInfo.Format.IsBgr() ? Format.B8G8R8A8Unorm : Format.R8G8B8A8Unorm, 1, 1, 4, 4);
- }
-
- return info.FormatInfo;
- }
-
- /// <summary>
- /// Checks if the host API supports a given texture compression format of the BC family.
- /// </summary>
- /// <param name="format">BC format to be checked</param>
- /// <param name="target">Target usage of the texture</param>
- /// <param name="caps">Host GPU Capabilities</param>
- /// <returns>True if the texture host supports the format with the given target usage, false otherwise</returns>
- public static bool HostSupportsBcFormat(Format format, Target target, Capabilities caps)
- {
- bool not3DOr3DCompressionSupported = target != Target.Texture3D || caps.Supports3DTextureCompression;
-
- switch (format)
- {
- case Format.Bc1RgbaSrgb:
- case Format.Bc1RgbaUnorm:
- case Format.Bc2Srgb:
- case Format.Bc2Unorm:
- case Format.Bc3Srgb:
- case Format.Bc3Unorm:
- return caps.SupportsBc123Compression && not3DOr3DCompressionSupported;
- case Format.Bc4Unorm:
- case Format.Bc4Snorm:
- case Format.Bc5Unorm:
- case Format.Bc5Snorm:
- return caps.SupportsBc45Compression && not3DOr3DCompressionSupported;
- case Format.Bc6HSfloat:
- case Format.Bc6HUfloat:
- case Format.Bc7Srgb:
- case Format.Bc7Unorm:
- return caps.SupportsBc67Compression && not3DOr3DCompressionSupported;
- }
-
- return true;
- }
-
- /// <summary>
- /// Determines whether a texture can flush its data back to guest memory.
- /// </summary>
- /// <param name="info">Texture information</param>
- /// <param name="caps">Host GPU Capabilities</param>
- /// <returns>True if the texture can flush, false otherwise</returns>
- public static bool CanTextureFlush(TextureInfo info, Capabilities caps)
- {
- if (IsFormatHostIncompatible(info, caps))
- {
- return false; // Flushing this format is not supported, as it may have been converted to another host format.
- }
-
- if (info.Target == Target.Texture2DMultisample ||
- info.Target == Target.Texture2DMultisampleArray)
- {
- return false; // Flushing multisample textures is not supported, the host does not allow getting their data.
- }
-
- return true;
- }
-
- /// <summary>
- /// Checks if the texture format matches with the specified texture information.
- /// </summary>
- /// <param name="lhs">Texture information to compare</param>
- /// <param name="rhs">Texture information to compare with</param>
- /// <param name="forSampler">Indicates that the texture will be used for shader sampling</param>
- /// <param name="forCopy">Indicates that the texture will be used as copy source or target</param>
- /// <returns>A value indicating how well the formats match</returns>
- public static TextureMatchQuality FormatMatches(TextureInfo lhs, TextureInfo rhs, bool forSampler, bool forCopy)
- {
- // D32F and R32F texture have the same representation internally,
- // however the R32F format is used to sample from depth textures.
- if (lhs.FormatInfo.Format == Format.D32Float && rhs.FormatInfo.Format == Format.R32Float && (forSampler || forCopy))
- {
- return TextureMatchQuality.FormatAlias;
- }
-
- if (forCopy)
- {
- // The 2D engine does not support depth-stencil formats, so it will instead
- // use equivalent color formats. We must also consider them as compatible.
- if (lhs.FormatInfo.Format == Format.S8Uint && rhs.FormatInfo.Format == Format.R8Unorm)
- {
- return TextureMatchQuality.FormatAlias;
- }
-
- if (lhs.FormatInfo.Format == Format.D16Unorm && rhs.FormatInfo.Format == Format.R16Unorm)
- {
- return TextureMatchQuality.FormatAlias;
- }
-
- if ((lhs.FormatInfo.Format == Format.D24UnormS8Uint ||
- lhs.FormatInfo.Format == Format.S8UintD24Unorm) && rhs.FormatInfo.Format == Format.B8G8R8A8Unorm)
- {
- return TextureMatchQuality.FormatAlias;
- }
- }
-
- return lhs.FormatInfo.Format == rhs.FormatInfo.Format ? TextureMatchQuality.Perfect : TextureMatchQuality.NoMatch;
- }
-
- /// <summary>
- /// Checks if the texture layout specified matches with this texture layout.
- /// The layout information is composed of the Stride for linear textures, or GOB block size
- /// for block linear textures.
- /// </summary>
- /// <param name="lhs">Texture information to compare</param>
- /// <param name="rhs">Texture information to compare with</param>
- /// <returns>True if the layout matches, false otherwise</returns>
- public static bool LayoutMatches(TextureInfo lhs, TextureInfo rhs)
- {
- if (lhs.IsLinear != rhs.IsLinear)
- {
- return false;
- }
-
- // For linear textures, gob block sizes are ignored.
- // For block linear textures, the stride is ignored.
- if (rhs.IsLinear)
- {
- return lhs.Stride == rhs.Stride;
- }
- else
- {
- return lhs.GobBlocksInY == rhs.GobBlocksInY &&
- lhs.GobBlocksInZ == rhs.GobBlocksInZ;
- }
- }
-
- /// <summary>
- /// Obtain the minimum compatibility level of two provided view compatibility results.
- /// </summary>
- /// <param name="first">The first compatibility level</param>
- /// <param name="second">The second compatibility level</param>
- /// <returns>The minimum compatibility level of two provided view compatibility results</returns>
- public static TextureViewCompatibility PropagateViewCompatibility(TextureViewCompatibility first, TextureViewCompatibility second)
- {
- if (first == TextureViewCompatibility.Incompatible || second == TextureViewCompatibility.Incompatible)
- {
- return TextureViewCompatibility.Incompatible;
- }
- else if (first == TextureViewCompatibility.LayoutIncompatible || second == TextureViewCompatibility.LayoutIncompatible)
- {
- return TextureViewCompatibility.LayoutIncompatible;
- }
- else if (first == TextureViewCompatibility.CopyOnly || second == TextureViewCompatibility.CopyOnly)
- {
- return TextureViewCompatibility.CopyOnly;
- }
- else
- {
- return TextureViewCompatibility.Full;
- }
- }
-
- /// <summary>
- /// Checks if the sizes of two texture levels are copy compatible.
- /// </summary>
- /// <param name="lhs">Texture information of the texture view</param>
- /// <param name="rhs">Texture information of the texture view to match against</param>
- /// <param name="lhsLevel">Mipmap level of the texture view in relation to this texture</param>
- /// <param name="rhsLevel">Mipmap level of the texture view in relation to the second texture</param>
- /// <returns>True if both levels are view compatible</returns>
- public static bool CopySizeMatches(TextureInfo lhs, TextureInfo rhs, int lhsLevel, int rhsLevel)
- {
- Size size = GetAlignedSize(lhs, lhsLevel);
-
- Size otherSize = GetAlignedSize(rhs, rhsLevel);
-
- if (size.Width == otherSize.Width && size.Height == otherSize.Height)
- {
- return true;
- }
- else if (lhs.IsLinear && rhs.IsLinear)
- {
- // Copy between linear textures with matching stride.
- int stride = BitUtils.AlignUp(Math.Max(1, lhs.Stride >> lhsLevel), Constants.StrideAlignment);
-
- return stride == rhs.Stride;
- }
- else
- {
- return false;
- }
- }
-
- /// <summary>
- /// Checks if the sizes of two given textures are view compatible.
- /// </summary>
- /// <param name="lhs">Texture information of the texture view</param>
- /// <param name="rhs">Texture information of the texture view to match against</param>
- /// <param name="exact">Indicates if the sizes must be exactly equal</param>
- /// <param name="level">Mipmap level of the texture view in relation to this texture</param>
- /// <returns>The view compatibility level of the view sizes</returns>
- public static TextureViewCompatibility ViewSizeMatches(TextureInfo lhs, TextureInfo rhs, bool exact, int level)
- {
- Size lhsAlignedSize = GetAlignedSize(lhs, level);
- Size rhsAlignedSize = GetAlignedSize(rhs);
-
- Size lhsSize = GetSizeInBlocks(lhs, level);
- Size rhsSize = GetSizeInBlocks(rhs);
-
- bool alignedWidthMatches = lhsAlignedSize.Width == rhsAlignedSize.Width;
-
- if (lhs.FormatInfo.BytesPerPixel != rhs.FormatInfo.BytesPerPixel && IsIncompatibleFormatAliasingAllowed(lhs.FormatInfo, rhs.FormatInfo))
- {
- alignedWidthMatches = lhsSize.Width * lhs.FormatInfo.BytesPerPixel == rhsSize.Width * rhs.FormatInfo.BytesPerPixel;
- }
-
- TextureViewCompatibility result = TextureViewCompatibility.Full;
-
- // For copies, we can copy a subset of the 3D texture slices,
- // so the depth may be different in this case.
- if (rhs.Target == Target.Texture3D && lhsSize.Depth != rhsSize.Depth)
- {
- result = TextureViewCompatibility.CopyOnly;
- }
-
- // Some APIs align the width for copy and render target textures,
- // so the width may not match in this case for different uses of the same texture.
- // To account for this, we compare the aligned width here.
- // We expect height to always match exactly, if the texture is the same.
- if (alignedWidthMatches && lhsSize.Height == rhsSize.Height)
- {
- return (exact && lhsSize.Width != rhsSize.Width) || lhsSize.Width < rhsSize.Width
- ? TextureViewCompatibility.CopyOnly
- : result;
- }
- else if (lhs.IsLinear && rhs.IsLinear && lhsSize.Height == rhsSize.Height)
- {
- // Copy between linear textures with matching stride.
- int stride = BitUtils.AlignUp(Math.Max(1, lhs.Stride >> level), Constants.StrideAlignment);
-
- return stride == rhs.Stride ? TextureViewCompatibility.CopyOnly : TextureViewCompatibility.LayoutIncompatible;
- }
- else
- {
- return TextureViewCompatibility.LayoutIncompatible;
- }
- }
-
- /// <summary>
- /// Checks if the potential child texture fits within the level and layer bounds of the parent.
- /// </summary>
- /// <param name="parent">Texture information for the parent</param>
- /// <param name="child">Texture information for the child</param>
- /// <param name="layer">Base layer of the child texture</param>
- /// <param name="level">Base level of the child texture</param>
- /// <returns>Full compatiblity if the child's layer and level count fit within the parent, incompatible otherwise</returns>
- public static TextureViewCompatibility ViewSubImagesInBounds(TextureInfo parent, TextureInfo child, int layer, int level)
- {
- if (level + child.Levels <= parent.Levels &&
- layer + child.GetSlices() <= parent.GetSlices())
- {
- return TextureViewCompatibility.Full;
- }
- else
- {
- return TextureViewCompatibility.LayoutIncompatible;
- }
- }
-
- /// <summary>
- /// Checks if the texture sizes of the supplied texture informations match.
- /// </summary>
- /// <param name="lhs">Texture information to compare</param>
- /// <param name="rhs">Texture information to compare with</param>
- /// <param name="exact">Indicates if the size must be exactly equal between the textures, or if <paramref name="rhs"/> is allowed to be larger</param>
- /// <returns>True if the sizes matches, false otherwise</returns>
- public static bool SizeMatches(TextureInfo lhs, TextureInfo rhs, bool exact)
- {
- if (lhs.GetLayers() != rhs.GetLayers())
- {
- return false;
- }
-
- Size lhsSize = GetSizeInBlocks(lhs);
- Size rhsSize = GetSizeInBlocks(rhs);
-
- if (exact || lhs.IsLinear || rhs.IsLinear)
- {
- return lhsSize.Width == rhsSize.Width &&
- lhsSize.Height == rhsSize.Height &&
- lhsSize.Depth == rhsSize.Depth;
- }
- else
- {
- Size lhsAlignedSize = GetAlignedSize(lhs);
- Size rhsAlignedSize = GetAlignedSize(rhs);
-
- return lhsAlignedSize.Width == rhsAlignedSize.Width &&
- lhsSize.Width >= rhsSize.Width &&
- lhsSize.Height == rhsSize.Height &&
- lhsSize.Depth == rhsSize.Depth;
- }
- }
-
- /// <summary>
- /// Gets the aligned sizes for the given dimensions, using the specified texture information.
- /// The alignment depends on the texture layout and format bytes per pixel.
- /// </summary>
- /// <param name="info">Texture information to calculate the aligned size from</param>
- /// <param name="width">The width to be aligned</param>
- /// <param name="height">The height to be aligned</param>
- /// <param name="depth">The depth to be aligned</param>
- /// <returns>The aligned texture size</returns>
- private static Size GetAlignedSize(TextureInfo info, int width, int height, int depth)
- {
- if (info.IsLinear)
- {
- return SizeCalculator.GetLinearAlignedSize(
- width,
- height,
- info.FormatInfo.BlockWidth,
- info.FormatInfo.BlockHeight,
- info.FormatInfo.BytesPerPixel);
- }
- else
- {
- return SizeCalculator.GetBlockLinearAlignedSize(
- width,
- height,
- depth,
- info.FormatInfo.BlockWidth,
- info.FormatInfo.BlockHeight,
- info.FormatInfo.BytesPerPixel,
- info.GobBlocksInY,
- info.GobBlocksInZ,
- info.GobBlocksInTileX);
- }
- }
-
- /// <summary>
- /// Gets the aligned sizes of the specified texture information.
- /// The alignment depends on the texture layout and format bytes per pixel.
- /// </summary>
- /// <param name="info">Texture information to calculate the aligned size from</param>
- /// <param name="level">Mipmap level for texture views</param>
- /// <returns>The aligned texture size</returns>
- public static Size GetAlignedSize(TextureInfo info, int level = 0)
- {
- int width = Math.Max(1, info.Width >> level);
- int height = Math.Max(1, info.Height >> level);
- int depth = Math.Max(1, info.GetDepth() >> level);
-
- return GetAlignedSize(info, width, height, depth);
- }
-
- /// <summary>
- /// Gets the size in blocks for the given texture information.
- /// For non-compressed formats, that's the same as the regular size.
- /// </summary>
- /// <param name="info">Texture information to calculate the aligned size from</param>
- /// <param name="level">Mipmap level for texture views</param>
- /// <returns>The texture size in blocks</returns>
- public static Size GetSizeInBlocks(TextureInfo info, int level = 0)
- {
- int width = Math.Max(1, info.Width >> level);
- int height = Math.Max(1, info.Height >> level);
- int depth = Math.Max(1, info.GetDepth() >> level);
-
- return new Size(
- BitUtils.DivRoundUp(width, info.FormatInfo.BlockWidth),
- BitUtils.DivRoundUp(height, info.FormatInfo.BlockHeight),
- depth);
- }
-
- /// <summary>
- /// Check if it's possible to create a view with the layout of the second texture information from the first.
- /// The layout information is composed of the Stride for linear textures, or GOB block size
- /// for block linear textures.
- /// </summary>
- /// <param name="lhs">Texture information of the texture view</param>
- /// <param name="rhs">Texture information of the texture view to compare against</param>
- /// <param name="level">Start level of the texture view, in relation with the first texture</param>
- /// <returns>True if the layout is compatible, false otherwise</returns>
- public static bool ViewLayoutCompatible(TextureInfo lhs, TextureInfo rhs, int level)
- {
- if (lhs.IsLinear != rhs.IsLinear)
- {
- return false;
- }
-
- // For linear textures, gob block sizes are ignored.
- // For block linear textures, the stride is ignored.
- if (rhs.IsLinear)
- {
- int stride = Math.Max(1, lhs.Stride >> level);
- stride = BitUtils.AlignUp(stride, Constants.StrideAlignment);
-
- return stride == rhs.Stride;
- }
- else
- {
- int height = Math.Max(1, lhs.Height >> level);
- int depth = Math.Max(1, lhs.GetDepth() >> level);
-
- (int gobBlocksInY, int gobBlocksInZ) = SizeCalculator.GetMipGobBlockSizes(
- height,
- depth,
- lhs.FormatInfo.BlockHeight,
- lhs.GobBlocksInY,
- lhs.GobBlocksInZ);
-
- return gobBlocksInY == rhs.GobBlocksInY &&
- gobBlocksInZ == rhs.GobBlocksInZ;
- }
- }
-
- /// <summary>
- /// Check if it's possible to create a view with the layout of the second texture information from the first.
- /// The layout information is composed of the Stride for linear textures, or GOB block size
- /// for block linear textures.
- /// </summary>
- /// <param name="lhs">Texture information of the texture view</param>
- /// <param name="rhs">Texture information of the texture view to compare against</param>
- /// <param name="lhsLevel">Start level of the texture view, in relation with the first texture</param>
- /// <param name="rhsLevel">Start level of the texture view, in relation with the second texture</param>
- /// <returns>True if the layout is compatible, false otherwise</returns>
- public static bool ViewLayoutCompatible(TextureInfo lhs, TextureInfo rhs, int lhsLevel, int rhsLevel)
- {
- if (lhs.IsLinear != rhs.IsLinear)
- {
- return false;
- }
-
- // For linear textures, gob block sizes are ignored.
- // For block linear textures, the stride is ignored.
- if (rhs.IsLinear)
- {
- int lhsStride = Math.Max(1, lhs.Stride >> lhsLevel);
- lhsStride = BitUtils.AlignUp(lhsStride, Constants.StrideAlignment);
-
- int rhsStride = Math.Max(1, rhs.Stride >> rhsLevel);
- rhsStride = BitUtils.AlignUp(rhsStride, Constants.StrideAlignment);
-
- return lhsStride == rhsStride;
- }
- else
- {
- int lhsHeight = Math.Max(1, lhs.Height >> lhsLevel);
- int lhsDepth = Math.Max(1, lhs.GetDepth() >> lhsLevel);
-
- (int lhsGobBlocksInY, int lhsGobBlocksInZ) = SizeCalculator.GetMipGobBlockSizes(
- lhsHeight,
- lhsDepth,
- lhs.FormatInfo.BlockHeight,
- lhs.GobBlocksInY,
- lhs.GobBlocksInZ);
-
- int rhsHeight = Math.Max(1, rhs.Height >> rhsLevel);
- int rhsDepth = Math.Max(1, rhs.GetDepth() >> rhsLevel);
-
- (int rhsGobBlocksInY, int rhsGobBlocksInZ) = SizeCalculator.GetMipGobBlockSizes(
- rhsHeight,
- rhsDepth,
- rhs.FormatInfo.BlockHeight,
- rhs.GobBlocksInY,
- rhs.GobBlocksInZ);
-
- return lhsGobBlocksInY == rhsGobBlocksInY &&
- lhsGobBlocksInZ == rhsGobBlocksInZ;
- }
- }
-
- /// <summary>
- /// Checks if the view format of the first texture format is compatible with the format of the second.
- /// In general, the formats are considered compatible if the bytes per pixel values are equal,
- /// but there are more complex rules for some formats, like compressed or depth-stencil formats.
- /// This follows the host API copy compatibility rules.
- /// </summary>
- /// <param name="lhs">Texture information of the texture view</param>
- /// <param name="rhs">Texture information of the texture view</param>
- /// <param name="caps">Host GPU capabilities</param>
- /// <returns>The view compatibility level of the texture formats</returns>
- public static TextureViewCompatibility ViewFormatCompatible(TextureInfo lhs, TextureInfo rhs, Capabilities caps)
- {
- FormatInfo lhsFormat = lhs.FormatInfo;
- FormatInfo rhsFormat = rhs.FormatInfo;
-
- if (lhsFormat.Format.IsDepthOrStencil() || rhsFormat.Format.IsDepthOrStencil())
- {
- return lhsFormat.Format == rhsFormat.Format ? TextureViewCompatibility.Full : TextureViewCompatibility.Incompatible;
- }
-
- if (IsFormatHostIncompatible(lhs, caps) || IsFormatHostIncompatible(rhs, caps))
- {
- return lhsFormat.Format == rhsFormat.Format ? TextureViewCompatibility.Full : TextureViewCompatibility.Incompatible;
- }
-
- if (lhsFormat.IsCompressed && rhsFormat.IsCompressed)
- {
- FormatClass lhsClass = GetFormatClass(lhsFormat.Format);
- FormatClass rhsClass = GetFormatClass(rhsFormat.Format);
-
- return lhsClass == rhsClass ? TextureViewCompatibility.Full : TextureViewCompatibility.Incompatible;
- }
- else if (lhsFormat.BytesPerPixel == rhsFormat.BytesPerPixel)
- {
- return lhs.FormatInfo.IsCompressed == rhs.FormatInfo.IsCompressed
- ? TextureViewCompatibility.Full
- : TextureViewCompatibility.CopyOnly;
- }
- else if (IsIncompatibleFormatAliasingAllowed(lhsFormat, rhsFormat))
- {
- return TextureViewCompatibility.CopyOnly;
- }
-
- return TextureViewCompatibility.Incompatible;
- }
-
- /// <summary>
- /// Checks if aliasing of two formats that would normally be considered incompatible be allowed,
- /// using copy dependencies.
- /// </summary>
- /// <param name="lhsFormat">Format information of the first texture</param
- /// <param name="rhsFormat">Format information of the second texture</param>
- /// <returns>True if aliasing should be allowed, false otherwise</returns>
- private static bool IsIncompatibleFormatAliasingAllowed(FormatInfo lhsFormat, FormatInfo rhsFormat)
- {
- // Some games will try to alias textures with incompatible foramts, with different BPP (bytes per pixel).
- // We allow that in some cases as long Width * BPP is equal on both textures.
- // This is very conservative right now as we want to avoid copies as much as possible,
- // so we only consider the formats we have seen being aliased.
-
- if (rhsFormat.BytesPerPixel < lhsFormat.BytesPerPixel)
- {
- (lhsFormat, rhsFormat) = (rhsFormat, lhsFormat);
- }
-
- return lhsFormat.Format == Format.R8Unorm && rhsFormat.Format == Format.R8G8B8A8Unorm;
- }
-
- /// <summary>
- /// Check if the target of the first texture view information is compatible with the target of the second texture view information.
- /// This follows the host API target compatibility rules.
- /// </summary>
- /// <param name="lhs">Texture information of the texture view</param
- /// <param name="rhs">Texture information of the texture view</param>
- /// <param name="caps">Host GPU capabilities</param>
- /// <returns>True if the targets are compatible, false otherwise</returns>
- public static TextureViewCompatibility ViewTargetCompatible(TextureInfo lhs, TextureInfo rhs, ref Capabilities caps)
- {
- bool result = false;
- switch (lhs.Target)
- {
- case Target.Texture1D:
- case Target.Texture1DArray:
- result = rhs.Target == Target.Texture1D ||
- rhs.Target == Target.Texture1DArray;
- break;
-
- case Target.Texture2D:
- result = rhs.Target == Target.Texture2D ||
- rhs.Target == Target.Texture2DArray;
- break;
-
- case Target.Texture2DArray:
- result = rhs.Target == Target.Texture2D ||
- rhs.Target == Target.Texture2DArray;
-
- if (rhs.Target == Target.Cubemap || rhs.Target == Target.CubemapArray)
- {
- return caps.SupportsCubemapView ? TextureViewCompatibility.Full : TextureViewCompatibility.CopyOnly;
- }
- break;
- case Target.Cubemap:
- case Target.CubemapArray:
- result = rhs.Target == Target.Cubemap ||
- rhs.Target == Target.CubemapArray;
-
- if (rhs.Target == Target.Texture2D || rhs.Target == Target.Texture2DArray)
- {
- return caps.SupportsCubemapView ? TextureViewCompatibility.Full : TextureViewCompatibility.CopyOnly;
- }
- break;
- case Target.Texture2DMultisample:
- case Target.Texture2DMultisampleArray:
- if (rhs.Target == Target.Texture2D || rhs.Target == Target.Texture2DArray)
- {
- return TextureViewCompatibility.CopyOnly;
- }
-
- result = rhs.Target == Target.Texture2DMultisample ||
- rhs.Target == Target.Texture2DMultisampleArray;
- break;
-
- case Target.Texture3D:
- if (rhs.Target == Target.Texture2D)
- {
- return TextureViewCompatibility.CopyOnly;
- }
-
- result = rhs.Target == Target.Texture3D;
- break;
- }
-
- return result ? TextureViewCompatibility.Full : TextureViewCompatibility.Incompatible;
- }
-
- /// <summary>
- /// Checks if a swizzle component in two textures functionally match, taking into account if the components are defined.
- /// </summary>
- /// <param name="lhs">Texture information to compare</param>
- /// <param name="rhs">Texture information to compare with</param>
- /// <param name="swizzleLhs">Swizzle component for the first texture</param>
- /// <param name="swizzleRhs">Swizzle component for the second texture</param>
- /// <param name="component">Component index, starting at 0 for red</param>
- /// <returns>True if the swizzle components functionally match, false othersize</returns>
- private static bool SwizzleComponentMatches(TextureInfo lhs, TextureInfo rhs, SwizzleComponent swizzleLhs, SwizzleComponent swizzleRhs, int component)
- {
- int lhsComponents = lhs.FormatInfo.Components;
- int rhsComponents = rhs.FormatInfo.Components;
-
- if (lhsComponents == 4 && rhsComponents == 4)
- {
- return swizzleLhs == swizzleRhs;
- }
-
- // Swizzles after the number of components a format defines are "undefined".
- // We allow these to not be equal under certain circumstances.
- // This can only happen when there are less than 4 components in a format.
- // It tends to happen when float depth textures are sampled.
-
- bool lhsDefined = (swizzleLhs - SwizzleComponent.Red) < lhsComponents;
- bool rhsDefined = (swizzleRhs - SwizzleComponent.Red) < rhsComponents;
-
- if (lhsDefined == rhsDefined)
- {
- // If both are undefined, return true. Otherwise just check if they're equal.
- return lhsDefined ? swizzleLhs == swizzleRhs : true;
- }
- else
- {
- SwizzleComponent defined = lhsDefined ? swizzleLhs : swizzleRhs;
- SwizzleComponent undefined = lhsDefined ? swizzleRhs : swizzleLhs;
-
- // Undefined swizzle can be matched by a forced value (0, 1), exact equality, or expected value.
- // For example, R___ matches R001, RGBA but not RBGA.
- return defined == undefined || defined < SwizzleComponent.Red || defined == SwizzleComponent.Red + component;
- }
- }
-
- /// <summary>
- /// Checks if the texture shader sampling parameters of two texture informations match.
- /// </summary>
- /// <param name="lhs">Texture information to compare</param>
- /// <param name="rhs">Texture information to compare with</param>
- /// <returns>True if the texture shader sampling parameters matches, false otherwise</returns>
- public static bool SamplerParamsMatches(TextureInfo lhs, TextureInfo rhs)
- {
- return lhs.DepthStencilMode == rhs.DepthStencilMode &&
- SwizzleComponentMatches(lhs, rhs, lhs.SwizzleR, rhs.SwizzleR, 0) &&
- SwizzleComponentMatches(lhs, rhs, lhs.SwizzleG, rhs.SwizzleG, 1) &&
- SwizzleComponentMatches(lhs, rhs, lhs.SwizzleB, rhs.SwizzleB, 2) &&
- SwizzleComponentMatches(lhs, rhs, lhs.SwizzleA, rhs.SwizzleA, 3);
- }
-
- /// <summary>
- /// Check if the texture target and samples count (for multisampled textures) matches.
- /// </summary>
- /// <param name="first">Texture information to compare with</param>
- /// <param name="rhs">Texture information to compare with</param>
- /// <returns>True if the texture target and samples count matches, false otherwise</returns>
- public static bool TargetAndSamplesCompatible(TextureInfo lhs, TextureInfo rhs)
- {
- return lhs.Target == rhs.Target &&
- lhs.SamplesInX == rhs.SamplesInX &&
- lhs.SamplesInY == rhs.SamplesInY;
- }
-
- /// <summary>
- /// Gets the texture format class, for compressed textures, or Unclassified otherwise.
- /// </summary>
- /// <param name="format">The format</param>
- /// <returns>Format class</returns>
- private static FormatClass GetFormatClass(Format format)
- {
- switch (format)
- {
- case Format.Bc1RgbaSrgb:
- case Format.Bc1RgbaUnorm:
- return FormatClass.Bc1Rgba;
- case Format.Bc2Srgb:
- case Format.Bc2Unorm:
- return FormatClass.Bc2;
- case Format.Bc3Srgb:
- case Format.Bc3Unorm:
- return FormatClass.Bc3;
- case Format.Bc4Snorm:
- case Format.Bc4Unorm:
- return FormatClass.Bc4;
- case Format.Bc5Snorm:
- case Format.Bc5Unorm:
- return FormatClass.Bc5;
- case Format.Bc6HSfloat:
- case Format.Bc6HUfloat:
- return FormatClass.Bc6;
- case Format.Bc7Srgb:
- case Format.Bc7Unorm:
- return FormatClass.Bc7;
- case Format.Etc2RgbSrgb:
- case Format.Etc2RgbUnorm:
- return FormatClass.Etc2Rgb;
- case Format.Etc2RgbaSrgb:
- case Format.Etc2RgbaUnorm:
- return FormatClass.Etc2Rgba;
- case Format.Astc4x4Srgb:
- case Format.Astc4x4Unorm:
- return FormatClass.Astc4x4;
- case Format.Astc5x4Srgb:
- case Format.Astc5x4Unorm:
- return FormatClass.Astc5x4;
- case Format.Astc5x5Srgb:
- case Format.Astc5x5Unorm:
- return FormatClass.Astc5x5;
- case Format.Astc6x5Srgb:
- case Format.Astc6x5Unorm:
- return FormatClass.Astc6x5;
- case Format.Astc6x6Srgb:
- case Format.Astc6x6Unorm:
- return FormatClass.Astc6x6;
- case Format.Astc8x5Srgb:
- case Format.Astc8x5Unorm:
- return FormatClass.Astc8x5;
- case Format.Astc8x6Srgb:
- case Format.Astc8x6Unorm:
- return FormatClass.Astc8x6;
- case Format.Astc8x8Srgb:
- case Format.Astc8x8Unorm:
- return FormatClass.Astc8x8;
- case Format.Astc10x5Srgb:
- case Format.Astc10x5Unorm:
- return FormatClass.Astc10x5;
- case Format.Astc10x6Srgb:
- case Format.Astc10x6Unorm:
- return FormatClass.Astc10x6;
- case Format.Astc10x8Srgb:
- case Format.Astc10x8Unorm:
- return FormatClass.Astc10x8;
- case Format.Astc10x10Srgb:
- case Format.Astc10x10Unorm:
- return FormatClass.Astc10x10;
- case Format.Astc12x10Srgb:
- case Format.Astc12x10Unorm:
- return FormatClass.Astc12x10;
- case Format.Astc12x12Srgb:
- case Format.Astc12x12Unorm:
- return FormatClass.Astc12x12;
- }
-
- return FormatClass.Unclassified;
- }
- }
-} \ No newline at end of file