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Ryujinx/Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs

831 lines
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36 KiB
C#

using Ryujinx.Common;
using Ryujinx.Graphics.GAL;
using Ryujinx.Graphics.Texture;
using System;
using System.Numerics;
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)
{
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 (!caps.SupportsR4G4Format && info.FormatInfo.Format == Format.R4G4Unorm)
{
return new FormatInfo(Format.R4G4B4A4Unorm, 1, 1, 2, 4);
}
if (!caps.Supports3DTextureCompression && info.Target == Target.Texture3D)
{
// The host API does not support 3D 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.Bc1RgbaSrgb:
case Format.Bc2Srgb:
case Format.Bc3Srgb:
return new FormatInfo(Format.R8G8B8A8Srgb, 1, 1, 4, 4);
case Format.Bc1RgbaUnorm:
case Format.Bc2Unorm:
case Format.Bc3Unorm:
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);
}
}
return info.FormatInfo;
}
/// <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 two formats are compatible, according to the host API copy format compatibility rules.
/// </summary>
/// <param name="lhsFormat">First comparand</param>
/// <param name="rhsFormat">Second comparand</param>
/// <param name="caps">Host GPU capabilities</param>
/// <returns>True if the formats are compatible, false otherwise</returns>
public static bool FormatCompatible(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;
}
if (IsFormatHostIncompatible(lhs, caps) || IsFormatHostIncompatible(rhs, caps))
{
return lhsFormat.Format == rhsFormat.Format;
}
if (lhsFormat.IsCompressed && rhsFormat.IsCompressed)
{
FormatClass lhsClass = GetFormatClass(lhsFormat.Format);
FormatClass rhsClass = GetFormatClass(rhsFormat.Format);
return lhsClass == rhsClass;
}
else
{
return lhsFormat.BytesPerPixel == rhsFormat.BytesPerPixel;
}
}
/// <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="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, int level)
{
Size size = GetAlignedSize(lhs, level);
Size otherSize = GetAlignedSize(rhs);
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 && size.Depth != otherSize.Depth)
{
result = TextureViewCompatibility.CopyOnly;
}
if (size.Width == otherSize.Width && size.Height == otherSize.Height)
{
if (level > 0 && result == TextureViewCompatibility.Full)
{
// A resize should not change the aligned size of the largest mip.
// If it would, then create a copy dependency rather than a full view.
Size mip0SizeLhs = GetAlignedSize(lhs);
Size mip0SizeRhs = GetLargestAlignedSize(rhs, level);
if (mip0SizeLhs.Width != mip0SizeRhs.Width || mip0SizeLhs.Height != mip0SizeRhs.Height)
{
result = TextureViewCompatibility.CopyOnly;
}
}
return result;
}
else if (lhs.IsLinear && rhs.IsLinear)
{
// 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>
/// <returns>True if the size matches, false otherwise</returns>
public static bool SizeMatches(TextureInfo lhs, TextureInfo rhs)
{
return SizeMatches(lhs, rhs, alignSizes: false);
}
/// <summary>
/// Checks if the texture sizes of the supplied texture informations match the given level
/// </summary>
/// <param name="lhs">Texture information to compare</param>
/// <param name="rhs">Texture information to compare with</param>
/// <param name="level">Mipmap level of this texture to compare with</param>
/// <returns>True if the size matches with the level, false otherwise</returns>
public static bool SizeMatches(TextureInfo lhs, TextureInfo rhs, int level)
{
return Math.Max(1, lhs.Width >> level) == rhs.Width &&
Math.Max(1, lhs.Height >> level) == rhs.Height &&
Math.Max(1, lhs.GetDepth() >> level) == rhs.GetDepth();
}
/// <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="alignSizes">True to align the sizes according to the texture layout for comparison</param>
/// <param name="lhsLevel">Mip level of the lhs texture. Aligned sizes are compared for the largest mip</param>
/// <returns>True if the sizes matches, false otherwise</returns>
public static bool SizeMatches(TextureInfo lhs, TextureInfo rhs, bool alignSizes, int lhsLevel = 0)
{
if (lhs.GetLayers() != rhs.GetLayers())
{
return false;
}
bool isTextureBuffer = lhs.Target == Target.TextureBuffer || rhs.Target == Target.TextureBuffer;
if (alignSizes && !isTextureBuffer)
{
Size size0 = GetLargestAlignedSize(lhs, lhsLevel);
Size size1 = GetLargestAlignedSize(rhs, lhsLevel);
return size0.Width == size1.Width &&
size0.Height == size1.Height &&
size0.Depth == size1.Depth;
}
else
{
return lhs.Width == rhs.Width &&
lhs.Height == rhs.Height &&
lhs.GetDepth() == rhs.GetDepth();
}
}
/// <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, shifted to the largest mip from a given level.
/// 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. Shifts the aligned size to represent the largest mip level</param>
/// <returns>The aligned texture size of the largest mip level</returns>
public static Size GetLargestAlignedSize(TextureInfo info, int level)
{
int width = info.Width << level;
int height = info.Height << level;
int depth = info.GetDepth() << level;
return GetAlignedSize(info, width, height, depth);
}
/// <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>
/// 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)
{
if (FormatCompatible(lhs, rhs, caps))
{
if (lhs.FormatInfo.IsCompressed != rhs.FormatInfo.IsCompressed)
{
return TextureViewCompatibility.CopyOnly;
}
else
{
return TextureViewCompatibility.Full;
}
}
return TextureViewCompatibility.Incompatible;
}
/// <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="isCopy">True to check for copy rather than view compatibility</param>
/// <returns>True if the targets are compatible, false otherwise</returns>
public static TextureViewCompatibility ViewTargetCompatible(TextureInfo lhs, TextureInfo rhs)
{
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:
case Target.Cubemap:
case Target.CubemapArray:
result = rhs.Target == Target.Texture2D ||
rhs.Target == Target.Texture2DArray ||
rhs.Target == Target.Cubemap ||
rhs.Target == Target.CubemapArray;
break;
case Target.Texture2DMultisample:
case Target.Texture2DMultisampleArray:
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;
}
}
}