private static Texture DecodeMultiframe(ImagingFactory imagingFactory, WicFlags flags, TextureDescription description, BitmapDecoder decoder)
{
var texture = new Texture(description);
Guid dstFormat = ToWic(description.Format, false);
for (int index = 0; index < description.ArraySize; ++index)
{
var image = texture.Images[index];
using (var frame = decoder.GetFrame(index))
{
var pfGuid = frame.PixelFormat;
var size = frame.Size;
if (size.Width == description.Width && size.Height == description.Height)
{
// This frame does not need resized
if (pfGuid == dstFormat)
{
frame.CopyPixels(image.Data, image.RowPitch);
}
else
{
using (var converter = new FormatConverter(imagingFactory))
{
converter.Initialize(frame, dstFormat, GetWicDither(flags), null, 0, BitmapPaletteType.Custom);
converter.CopyPixels(image.Data, image.RowPitch);
}
}
}
else
{
// This frame needs resizing
using (var scaler = new BitmapScaler(imagingFactory))
{
scaler.Initialize(frame, description.Width, description.Height, GetWicInterp(flags));
Guid pfScaler = scaler.PixelFormat;
if (pfScaler == dstFormat)
{
scaler.CopyPixels(image.Data, image.RowPitch);
}
else
{
// The WIC bitmap scaler is free to return a different pixel format than the source image, so here we
// convert it to our desired format
using (var converter = new FormatConverter(imagingFactory))
{
converter.Initialize(scaler, dstFormat, GetWicDither(flags), null, 0, BitmapPaletteType.Custom);
converter.CopyPixels(image.Data, image.RowPitch);
}
}
}
}
}
}
return texture;
}
public static Texture2D LoadTexture(IGraphicsService graphicsService, string fileName)
{
if (fileName == null)
{
throw new ArgumentNullException(nameof(fileName));
}
if (fileName.Length == 0)
{
throw new ArgumentException("The file name must not be empty.", nameof(fileName));
}
// Load API-independent texture.
Texture texture = null;
using (var stream = File.OpenRead(fileName))
{
string extension = Path.GetExtension(fileName);
if (!string.IsNullOrEmpty(extension))
{
extension = extension.ToUpperInvariant();
if (extension == ".DDS")
{
texture = DdsHelper.Load(stream, DdsFlags.ForceRgb | DdsFlags.ExpandLuminance);
}
else if (extension == ".TGA")
{
texture = TgaHelper.Load(stream);
}
}
if (texture == null)
{
// TODO: Register ImagingFactory as service.
using (var imagingFactory = new ImagingFactory())
texture = WicHelper.Load(imagingFactory, stream, WicFlags.ForceRgb | WicFlags.No16Bpp);
}
}
//Tests(texture);
// Convert to XNA texture.
var description = texture.Description;
if (description.Dimension == TextureDimension.TextureCube)
{
var texture2D = new Texture2D(graphicsService.GraphicsDevice, description.Width, description.Height, false, description.Format.ToSurfaceFormat());
texture2D.SetData(texture.Images[0].Data);
return(texture2D);
}
else
{
var texture2D = new Texture2D(graphicsService.GraphicsDevice, description.Width, description.Height, description.MipLevels > 1, description.Format.ToSurfaceFormat());
for (int i = 0; i < texture.Description.MipLevels; i++)
{
texture2D.SetData(i, null, texture.Images[i].Data, 0, texture.Images[i].Data.Length);
}
return(texture2D);
}
}
public OutputHandler(Texture texture)
{
_texture = texture;
}
/// <summary>
/// Resizes the specified texture and/or generates mipmaps.
/// </summary>
/// <param name="texture">The texture.</param>
/// <param name="width">The desired width.</param>
/// <param name="height">The desired height.</param>
/// <param name="inputGamma">The input gamma.</param>
/// <param name="outputGamma">The output gamma.</param>
/// <param name="generateMipmaps">
/// <see langword="true"/> to generate all mipmap levels; otherwise <see langword="false"/>.
/// </param>
/// <param name="hasAlpha">
/// <see langword="true"/> if <paramref name="texture"/> requires an alpha channel; otherwise,
/// <see langword="false"/> if <paramref name="texture"/> is opaque.
/// </param>
/// <param name="hasFractionalAlpha">
/// <see langword="true"/> if <paramref name="texture"/> contains fractional alpha values;
/// otherwise, <see langword="false"/> if <paramref name="texture"/> is opaque or contains only
/// binary alpha.
/// </param>
/// <param name="premultipliedAlpha">
/// <see langword="true"/> when <paramref name="texture"/> is using premultiplied alpha.;
/// otherwise, <see langword="false"/>.</param>
/// <returns>The resized texture.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="texture"/> is <see langword="null"/>.
/// </exception>
public static Texture ResizeAndGenerateMipmaps(Texture texture, int width, int height, float inputGamma, float outputGamma, bool generateMipmaps, bool hasAlpha, bool hasFractionalAlpha, bool premultipliedAlpha)
{
if (texture == null)
throw new ArgumentNullException("texture");
// NVIDIA Texture Tools expect BGRA 8:8:8:8.
if (texture.Description.Format != TextureFormat.B8G8R8A8_UNorm)
throw new ArgumentException("Texture format needs to be B8G8R8A8_UNORM.", "texture");
if (texture.Description.Dimension != TextureDimension.TextureCube && texture.Description.ArraySize > 1)
throw new NotSupportedException("Resizing and mipmap generation for texture arrays is not supported.");
if (texture.Description.Dimension == TextureDimension.Texture3D)
throw new NotSupportedException("Resizing and mipmap generation for volume textures is not supported.");
// ----- InputOptions
var inputOptions = new InputOptions();
inputOptions.SetAlphaMode(hasAlpha ? (premultipliedAlpha ? AlphaMode.Premultiplied : AlphaMode.Transparency)
: AlphaMode.None);
inputOptions.SetFormat(InputFormat.BGRA_8UB);
inputOptions.SetGamma(inputGamma, outputGamma);
inputOptions.SetMipmapFilter(MipmapFilter.Box);
inputOptions.SetMipmapGeneration(generateMipmaps);
bool roundToPowerOfTwo = (width != texture.Description.Width || height != texture.Description.Height);
inputOptions.SetRoundMode(roundToPowerOfTwo ? RoundMode.ToNextPowerOfTwo : RoundMode.None);
inputOptions.SetWrapMode(WrapMode.Mirror);
var description = texture.Description;
bool isCube = description.Dimension == TextureDimension.TextureCube;
var textureType = isCube ? TextureType.TextureCube : TextureType.Texture2D;
inputOptions.SetTextureLayout(textureType, description.Width, description.Height, 1);
for (int arrayIndex = 0; arrayIndex < description.ArraySize; arrayIndex++)
{
for (int mipIndex = 0; mipIndex < description.MipLevels; mipIndex++)
{
int index = texture.GetImageIndex(mipIndex, arrayIndex, 0);
var image = texture.Images[index];
var handle = GCHandle.Alloc(image.Data, GCHandleType.Pinned);
inputOptions.SetMipmapData(handle.AddrOfPinnedObject(), image.Width, image.Height, 1, arrayIndex, mipIndex);
handle.Free();
}
}
// ----- OutputOptions
var outputOptions = new OutputOptions();
outputOptions.SetOutputHeader(false);
outputOptions.Error += OnError;
description.Format = TextureFormat.R8G8B8A8_UNorm;
description.Width = width;
description.Height = height;
description.MipLevels = generateMipmaps ? CalculateMipLevels(width, height) : 1;
var resizedTexture = new Texture(description);
var outputHandler = new OutputHandler(resizedTexture);
outputOptions.SetOutputHandler(outputHandler.BeginImage, outputHandler.WriteData);
// ----- CompressionOptions
var compressionOptions = new CompressionOptions();
compressionOptions.SetFormat(Format.RGBA);
compressionOptions.SetPixelFormat(32, 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000);
compressionOptions.SetQuality(Quality.Normal);
// ----- Run NVTT
try
{
var compressor = new Compressor();
compressor.Compress(inputOptions, compressionOptions, outputOptions);
}
catch (NullReferenceException)
{
// Resizing and mipmap generation without compression sometimes causes a
// NullReferenceException in nvttCompress().
throw new Exception("NullReferenceException in NVIDIA texture tools. Please try again.");
}
return resizedTexture;
}
/// <summary>
/// Saves the specified texture in DDS format.
/// </summary>
/// <param name="texture">The texture.</param>
/// <param name="stream">The stream to write to.</param>
/// <param name="flags">Additional options.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="texture"/> or <paramref name="stream"/> is <see langword="null"/>.
/// </exception>
public static void Save(Texture texture, Stream stream, DdsFlags flags)
{
if (texture == null)
throw new ArgumentNullException("texture");
if (stream == null)
throw new ArgumentNullException("stream");
#if NET45
using (var writer = new BinaryWriter(stream, Encoding.Default, true))
#else
using (var writer = new BinaryWriter(stream, Encoding.Default)) // Warning: Closes the stream!
#endif
{
var description = texture.Description;
EncodeDDSHeader(writer, description, flags);
switch (description.Dimension)
{
case TextureDimension.Texture1D:
case TextureDimension.Texture2D:
case TextureDimension.TextureCube:
{
int index = 0;
for (int item = 0; item < description.ArraySize; ++item)
{
for (int level = 0; level < description.MipLevels; ++level)
{
var image = texture.Images[index];
stream.Write(image.Data, 0, image.Data.Length);
++index;
}
}
}
break;
case TextureDimension.Texture3D:
{
if (description.ArraySize != 1)
throw new NotSupportedException("Arrays of volume textures are not supported.");
int d = description.Depth;
int index = 0;
for (int level = 0; level < description.MipLevels; ++level)
{
for (int slice = 0; slice < d; ++slice)
{
var image = texture.Images[index];
stream.Write(image.Data, 0, image.Data.Length);
++index;
}
if (d > 1)
d >>= 1;
}
}
break;
default:
throw new NotSupportedException("The specified texture dimension is not supported.");
}
}
}
/// <summary>
/// Compresses the specified texture using a Block Compression format (BC<i>n</i>).
/// </summary>
/// <param name="texture">The uncompressed texture.</param>
/// <param name="inputGamma">The input gamma.</param>
/// <param name="outputGamma">The output gamma.</param>
/// <param name="generateMipmaps">
/// <see langword="true"/> to generate all mipmap levels; otherwise <see langword="false"/>.
/// </param>
/// <param name="hasAlpha">
/// <see langword="true"/> if <paramref name="texture"/> requires an alpha channel; otherwise,
/// <see langword="false"/> if <paramref name="texture"/> is opaque.
/// </param>
/// <param name="hasFractionalAlpha">
/// <see langword="true"/> if <paramref name="texture"/> contains fractional alpha values;
/// otherwise, <see langword="false"/> if <paramref name="texture"/> is opaque or contains only
/// binary alpha.
/// </param>
/// <param name="premultipliedAlpha">
/// <see langword="true"/> when <paramref name="texture"/> is using premultiplied alpha.;
/// otherwise, <see langword="false"/>.</param>
/// <param name="sharpAlpha">
/// <see langword="true"/> when the texture contains a sharp alpha mask; otherwise
/// <see langword="false"/>.
/// </param>
/// <returns>The compressed texture.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="texture"/> is <see langword="null"/>.
/// </exception>
/// <exception cref="ArgumentException">
/// Texture width and height need to be equal (square texture) and a power of two (POT
/// texture).
/// </exception>
internal static Texture CompressBCn(Texture texture, float inputGamma, float outputGamma, bool generateMipmaps, bool hasAlpha, bool hasFractionalAlpha, bool premultipliedAlpha, bool sharpAlpha = false)
{
if (texture == null)
throw new ArgumentNullException("texture");
if (texture.Description.Dimension == TextureDimension.Texture3D)
throw new NotSupportedException("Texture compression for volume textures is not supported.");
// NVIDIA Texture Tools expect BGRA 8:8:8:8.
texture = texture.ConvertTo(TextureFormat.B8G8R8A8_UNorm);
// ----- InputOptions
var inputOptions = new InputOptions();
inputOptions.SetAlphaMode(hasAlpha ? (premultipliedAlpha ? AlphaMode.Premultiplied : AlphaMode.Transparency)
: AlphaMode.None);
inputOptions.SetFormat(InputFormat.BGRA_8UB);
inputOptions.SetGamma(inputGamma, outputGamma);
inputOptions.SetMipmapFilter(MipmapFilter.Box);
inputOptions.SetMipmapGeneration(generateMipmaps);
inputOptions.SetRoundMode(RoundMode.None); // Size is set explicitly.
inputOptions.SetWrapMode(WrapMode.Mirror);
var description = texture.Description;
bool isCube = description.Dimension == TextureDimension.TextureCube;
var textureType = isCube ? TextureType.TextureCube : TextureType.Texture2D;
inputOptions.SetTextureLayout(textureType, description.Width, description.Height, 1);
for (int arrayIndex = 0; arrayIndex < description.ArraySize; arrayIndex++)
{
for (int mipIndex = 0; mipIndex < description.MipLevels; mipIndex++)
{
int index = texture.GetImageIndex(mipIndex, arrayIndex, 0);
var image = texture.Images[index];
var handle = GCHandle.Alloc(image.Data, GCHandleType.Pinned);
inputOptions.SetMipmapData(handle.AddrOfPinnedObject(), image.Width, image.Height, 1, arrayIndex, mipIndex);
handle.Free();
}
}
// ----- OutputOptions
var outputOptions = new OutputOptions();
outputOptions.SetOutputHeader(false);
outputOptions.Error += OnError;
Format compressedFormat;
if (hasAlpha)
{
if (sharpAlpha)
{
compressedFormat = Format.BC2;
description.Format = TextureFormat.BC2_UNorm;
}
else
{
compressedFormat = Format.BC3;
description.Format = TextureFormat.BC3_UNorm;
}
}
else
{
compressedFormat = Format.BC1;
description.Format = TextureFormat.BC1_UNorm;
}
var compressedTexture = new Texture(description);
var outputHandler = new OutputHandler(compressedTexture);
outputOptions.SetOutputHandler(outputHandler.BeginImage, outputHandler.WriteData);
// ----- CompressionOptions
var compressionOptions = new CompressionOptions();
compressionOptions.SetFormat(compressedFormat);
compressionOptions.SetQuality(Quality.Normal);
// ----- Run NVTT
try
{
var compressor = new Compressor();
compressor.Compress(inputOptions, compressionOptions, outputOptions);
}
catch (NullReferenceException)
{
throw new Exception("NullReferenceException in NVIDIA texture tools. Please try again.");
}
return compressedTexture;
}
/// <summary>
/// Loads the specified TGA image.
/// </summary>
/// <param name="stream">The stream to read from.</param>
/// <returns>The <see cref="Texture"/> representing the TGA image.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="stream"/> is <see langword="null"/>.
/// </exception>
public static Texture Load(Stream stream)
{
if (stream == null)
throw new ArgumentNullException("stream");
int offset;
ConversionFlags convFlags;
var description = DecodeTGAHeader(stream, out offset, out convFlags);
var texture = new Texture(description);
stream.Position = offset;
using (var reader = new BinaryReader(stream, Encoding.Default))
{
if ((convFlags & ConversionFlags.RLE) != 0)
UncompressPixels(reader, texture.Images[0], description.Format, convFlags);
else
CopyPixels(reader, texture.Images[0], description.Format, convFlags);
}
return texture;
}
/// <summary>
/// Converts the specified texture to another format.
/// </summary>
/// <param name="format">The desired texture format.</param>
/// <returns>
/// The texture using <paramref name="format" />. Does nothing (returns <c>this</c>) if texture
/// already has the desired format.
/// </returns>
/// <exception cref="NotSupportedException">
/// Texture conversion to the specified format is not supported.
/// </exception>
public Texture ConvertTo(DataFormat format)
{
var srcFormat = Description.Format;
var dstFormat = format;
if (srcFormat == dstFormat)
return this;
// ----- Direct conversion:
// srcFormat -> dstFormat
if (TextureHelper.CanConvert(srcFormat, dstFormat))
{
var description = Description;
description.Format = dstFormat;
var texture = new Texture(description);
#if SINGLE_THREADED
for (int i = 0; i < Images.Count; i++)
#else
Parallel.For(0, Images.Count, i =>
#endif
{
TextureHelper.Convert(Images[i], texture.Images[i]);
}
#if !SINGLE_THREADED
);
#endif
return texture;
}
// ----- Conversion using intermediate formats:
// srcFormat -> R32G32B32A32_FLOAT -> dstFormat
if (TextureHelper.CanConvert(srcFormat, DataFormat.R32G32B32A32_FLOAT)
&& TextureHelper.CanConvert(DataFormat.R32G32B32A32_FLOAT, dstFormat))
{
var texture = ConvertTo(DataFormat.R32G32B32A32_FLOAT);
return texture.ConvertTo(dstFormat);
}
// srcFormat -> R8G8B8A8_UNORM -> dstFormat
if (TextureHelper.CanConvert(srcFormat, DataFormat.R8G8B8A8_UNORM)
&& TextureHelper.CanConvert(DataFormat.R8G8B8A8_UNORM, dstFormat))
{
var texture = ConvertTo(DataFormat.R8G8B8A8_UNORM);
return texture.ConvertTo(dstFormat);
}
throw new NotSupportedException(string.Format("Texture format conversion from {0} to {1} is not supported.", srcFormat, dstFormat));
}
/// <overloads>
/// <summary>
/// Prepares a normal map for compression using DXT5 (a.k.a. DXT5nm).
/// </summary>
/// </overloads>
///
/// <summary>
/// Prepares a normal map for compression using DXT5 (a.k.a. DXT5nm).
/// </summary>
/// <param name="texture">The texture (<see cref="DataFormat.R32G32B32A32_FLOAT"/>).</param>
/// <param name="invertY"><see langword="true"/> to invert the y component.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="texture"/> is <see langword="null"/>.
/// </exception>
public static void ProcessNormals(Texture texture, bool invertY)
{
if (texture == null)
throw new ArgumentNullException("texture");
#if SINGLE_THREADED
foreach (var image in texture.Images)
ProcessNormals(image, invertY);
#else
Parallel.ForEach(texture.Images, image => ProcessNormals(image, invertY));
#endif
}
private static void Resize3D(Texture srcTexture, int srcMipIndex, int srcArrayOrFaceIndex, Texture dstTexture, int dstMipIndex, int dstArrayOrFaceIndex, Filter filter, bool alphaTransparency, TextureAddressMode wrapMode)
{
int srcIndex = srcTexture.GetImageIndex(srcMipIndex, srcArrayOrFaceIndex, 0);
int srcWidth = srcTexture.Images[srcIndex].Width;
int srcHeight = srcTexture.Images[srcIndex].Height;
int srcDepth = srcTexture.GetDepth(srcMipIndex);
int dstIndex = dstTexture.GetImageIndex(dstMipIndex, dstArrayOrFaceIndex, 0);
int dstWidth = dstTexture.Images[dstIndex].Width;
int dstHeight = dstTexture.Images[dstIndex].Height;
int dstDepth = dstTexture.GetDepth(dstMipIndex);
// Resize volume.
var kernelX = new PolyphaseKernel(filter, srcWidth, dstWidth, 32);
var kernelY = new PolyphaseKernel(filter, srcHeight, dstHeight, 32);
var kernelZ = new PolyphaseKernel(filter, srcDepth, dstDepth, 32);
var tmpTexture = new Texture(new TextureDescription
{
Dimension = TextureDimension.Texture3D,
Width = dstWidth,
Height = srcHeight,
Depth = srcDepth,
MipLevels = 1,
ArraySize = 1,
Format = DataFormat.R32G32B32A32_FLOAT
});
var tmpTexture2 = new Texture(new TextureDescription
{
Dimension = TextureDimension.Texture3D,
Width = dstWidth,
Height = dstHeight,
Depth = srcDepth,
MipLevels = 1,
ArraySize = 1,
Format = DataFormat.R32G32B32A32_FLOAT
});
// ReSharper disable AccessToDisposedClosure
using (var srcVolume = new VolumeAccessor(srcTexture, srcMipIndex, srcArrayOrFaceIndex))
using (var tmpVolume = new VolumeAccessor(tmpTexture, 0, 0))
using (var tmpVolume2 = new VolumeAccessor(tmpTexture2, 0, 0))
using (var dstVolume = new VolumeAccessor(dstTexture, dstMipIndex, dstArrayOrFaceIndex))
{
// Resize horizontally: srcVolume --> tmpVolume
{
float scale = (float)tmpVolume.Width / srcVolume.Width;
float inverseScale = 1.0f / scale;
#if SINGLE_THREADED
for (int z = 0; z < tmpVolume.Depth; z++)
#else
Parallel.For(0, tmpVolume.Depth, z =>
#endif
{
for (int y = 0; y < tmpVolume.Height; y++)
{
// Apply polyphase kernel horizontally.
for (int x = 0; x < tmpVolume.Width; x++)
{
float center = (x + 0.5f) * inverseScale;
int left = (int)Math.Floor(center - kernelX.Width);
int right = (int)Math.Ceiling(center + kernelX.Width);
Debug.Assert(right - left <= kernelX.WindowSize);
float totalRgbWeights = 0.0f;
Vector4F sum = new Vector4F();
for (int i = 0; i < kernelX.WindowSize; i++)
{
Vector4F color = srcVolume.GetPixel(left + i, y, z, wrapMode);
const float alphaEpsilon = 1.0f / 256.0f;
float alpha = alphaTransparency ? color.W + alphaEpsilon : 1.0f;
float weight = kernelX.Weights[x, i];
float rgbWeight = weight * alpha;
totalRgbWeights += rgbWeight;
sum.X += color.X * rgbWeight;
sum.Y += color.Y * rgbWeight;
sum.Z += color.Z * rgbWeight;
sum.W += color.W * weight;
}
float f = 1 / totalRgbWeights;
sum.X *= f;
sum.Y *= f;
sum.Z *= f;
tmpVolume.SetPixel(x, y, z, sum);
}
}
}
#if !SINGLE_THREADED
);
#endif
}
// Resize vertically: tmpVolume --> tmpVolume2
{
float scale = (float)tmpVolume2.Height / tmpVolume.Height;
float inverseScale = 1.0f / scale;
#if SINGLE_THREADED
for (int z = 0; z < tmpVolume2.Depth; z++)
#else
Parallel.For(0, tmpVolume2.Depth, z =>
#endif
{
for (int x = 0; x < tmpVolume2.Width; x++)
{
// Apply polyphase kernel vertically.
for (int y = 0; y < tmpVolume2.Height; y++)
{
float center = (y + 0.5f) * inverseScale;
int left = (int)Math.Floor(center - kernelY.Width);
int right = (int)Math.Ceiling(center + kernelY.Width);
Debug.Assert(right - left <= kernelY.WindowSize);
float totalRgbWeights = 0.0f;
Vector4F sum = new Vector4F();
for (int i = 0; i < kernelY.WindowSize; i++)
{
Vector4F color = tmpVolume.GetPixel(x, left + i, z, wrapMode);
const float alphaEpsilon = 1.0f / 256.0f;
float alpha = alphaTransparency ? color.W + alphaEpsilon : 1.0f;
float weight = kernelY.Weights[y, i];
float rgbWeight = weight * alpha;
totalRgbWeights += rgbWeight;
sum.X += color.X * rgbWeight;
sum.Y += color.Y * rgbWeight;
sum.Z += color.Z * rgbWeight;
sum.W += color.W * weight;
}
float f = 1 / totalRgbWeights;
sum.X *= f;
sum.Y *= f;
sum.Z *= f;
tmpVolume2.SetPixel(x, y, z, sum);
}
}
}
#if !SINGLE_THREADED
);
#endif
}
// Resize depth: tmpVolume2 --> dstVolume
{
float scale = (float)dstVolume.Depth / tmpVolume2.Depth;
float inverseScale = 1.0f / scale;
#if SINGLE_THREADED
for (int y = 0; y < dstVolume.Height; y++)
#else
Parallel.For(0, dstVolume.Height, y =>
#endif
{
for (int x = 0; x < dstVolume.Width; x++)
{
// Apply polyphase kernel along z direction.
for (int z = 0; z < dstVolume.Depth; z++)
{
float center = (z + 0.5f) * inverseScale;
int left = (int)Math.Floor(center - kernelZ.Width);
int right = (int)Math.Ceiling(center + kernelZ.Width);
Debug.Assert(right - left <= kernelZ.WindowSize);
float totalRgbWeights = 0.0f;
Vector4F sum = new Vector4F();
for (int i = 0; i < kernelZ.WindowSize; i++)
{
Vector4F color = tmpVolume2.GetPixel(x, y, left + i, wrapMode);
const float alphaEpsilon = 1.0f / 256.0f;
float alpha = alphaTransparency ? color.W + alphaEpsilon : 1.0f;
float weight = kernelZ.Weights[z, i];
float rgbWeight = weight * alpha;
totalRgbWeights += rgbWeight;
sum.X += color.X * rgbWeight;
sum.Y += color.Y * rgbWeight;
sum.Z += color.Z * rgbWeight;
sum.W += color.W * weight;
}
float f = 1 / totalRgbWeights;
sum.X *= f;
sum.Y *= f;
sum.Z *= f;
dstVolume.SetPixel(x, y, z, sum);
}
}
}
#if !SINGLE_THREADED
);
#endif
}
}
// ReSharper restore AccessToDisposedClosure
}
/// <overloads>
/// <summary>
/// Converts the specified texture/image from linear space to gamma space.
/// </summary>
/// </overloads>
///
/// <summary>
/// Converts the specified texture from linear space to gamma space.
/// </summary>
/// <param name="texture">The texture (<see cref="DataFormat.R32G32B32A32_FLOAT"/>).</param>
/// <param name="gamma">The gamma value.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="texture"/> is <see langword="null"/>.
/// </exception>
public static void LinearToGamma(Texture texture, float gamma)
{
if (texture == null)
throw new ArgumentNullException("texture");
if (Numeric.AreEqual(gamma, 1.0f))
return;
if (gamma <= 0)
{
string message = string.Format(
CultureInfo.InvariantCulture,
"Invalid gamma value {0}. The gamma correction value must be greater than 0.",
gamma);
throw new ArgumentException(message, "gamma");
}
#if SINGLE_THREADED
foreach (var image in texture.Images)
LinearToGamma(image, gamma);
#else
Parallel.ForEach(texture.Images, image => LinearToGamma(image, gamma));
#endif
}
/// <overloads>
/// <summary>
/// Premultiplies the alpha value of the specified texture/image.
/// </summary>
/// </overloads>
///
/// <summary>
/// Premultiplies the alpha value of the specified texture.
/// </summary>
/// <param name="texture">The texture (<see cref="DataFormat.R32G32B32A32_FLOAT"/>).</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="texture"/> is <see langword="null"/>.
/// </exception>
public static void PremultiplyAlpha(Texture texture)
{
if (texture == null)
throw new ArgumentNullException("texture");
#if SINGLE_THREADED
foreach (var image in texture.Images)
PremultiplyAlpha(image);
#else
Parallel.ForEach(texture.Images, PremultiplyAlpha);
#endif
}
/// <overloads>
/// <summary>
/// Determines whether the specified texture/image uses the alpha channel.
/// </summary>
/// </overloads>
///
/// <summary>
/// Determines whether the specified texture uses the alpha channel.
/// </summary>
/// <param name="texture">The texture.</param>
/// <param name="hasAlpha">
/// <see langword="true"/> if <paramref name="texture"/> requires an alpha channel; otherwise,
/// <see langword="false"/> if <paramref name="texture"/> is opaque.
/// </param>
/// <param name="hasFractionalAlpha">
/// <see langword="true"/> if <paramref name="texture"/> contains fractional alpha values;
/// otherwise, <see langword="false"/> if <paramref name="texture"/> is opaque or contains only
/// binary alpha.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="texture"/> is <see langword="null"/>.
/// </exception>
public static void HasAlpha(Texture texture, out bool hasAlpha, out bool hasFractionalAlpha)
{
if (texture == null)
throw new ArgumentNullException("texture");
// Test mip level 0.
Image[] images;
switch (texture.Description.Dimension)
{
case TextureDimension.Texture1D:
case TextureDimension.Texture2D:
case TextureDimension.TextureCube:
{
images = new Image[texture.Description.ArraySize];
for (int arrayIndex = 0; arrayIndex < images.Length; arrayIndex++)
images[arrayIndex] = texture.Images[texture.GetImageIndex(0, arrayIndex, 0)];
}
break;
case TextureDimension.Texture3D:
{
images = new Image[texture.Description.Depth];
for (int zIndex = 0; zIndex < images.Length; zIndex++)
images[zIndex] = texture.Images[texture.GetImageIndex(0, 0, zIndex)];
}
break;
default:
throw new NotSupportedException("The specified texture dimension is not supported.");
}
hasAlpha = false;
hasFractionalAlpha = false;
foreach (var image in images)
{
bool currentHasAlpha, currentHasFractionalAlpha;
HasAlpha(image, out currentHasAlpha, out currentHasFractionalAlpha);
hasAlpha = hasAlpha || currentHasAlpha;
hasFractionalAlpha = currentHasFractionalAlpha;
if (hasFractionalAlpha)
return;
}
}
/// <summary>
/// Mirrors the volume texture along the z-axis.
/// </summary>
/// <param name="texture">The texture.</param>
/// <remarks>
/// The method does nothing if <paramref name="texture"/> is not a volume texture.
/// </remarks>
/// <exception cref="ArgumentNullException">
/// <paramref name="texture"/> is <see langword="null"/>.
/// </exception>
public static void FlipZ(Texture texture)
{
if (texture == null)
throw new ArgumentNullException("texture");
var description = texture.Description;
if (description.Dimension != TextureDimension.Texture3D)
return;
for (int level = 0; level < description.MipLevels; level++)
{
int baseIndex = texture.GetImageIndex(level, 0, 0);
for (int z0 = 0; z0 < description.Depth / 2; z0++)
{
int z1 = description.Depth - z0 - 1;
int index0 = baseIndex + z0;
int index1 = baseIndex + z1;
var image0 = texture.Images[index0];
var image1 = texture.Images[index1];
texture.Images[index0] = image1;
texture.Images[index1] = image0;
}
}
}
/// <overloads>
/// <summary>
/// Applies color keying to the specified texture/image.
/// </summary>
/// </overloads>
///
/// <summary>
/// Applies color keying to the specified texture (<see cref="DataFormat.R8G8B8A8_UNORM"/>).
/// </summary>
/// <param name="texture">The texture (<see cref="DataFormat.R8G8B8A8_UNORM"/>).</param>
/// <param name="r">The red component of the color key.</param>
/// <param name="g">The green component of the color key.</param>
/// <param name="b">The blue component of the color key.</param>
/// <param name="a">The alpha component of the color key.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="texture"/> is <see langword="null"/>.
/// </exception>
public static void ApplyColorKey(Texture texture, byte r, byte g, byte b, byte a)
{
if (texture == null)
throw new ArgumentNullException("texture");
if (BitsPerPixel(texture.Description.Format) != 32)
throw new NotSupportedException(string.Format("The texture format ({0}) is not supported.", texture.Description.Format));
#if SINGLE_THREADED
foreach (var image in texture.Images)
ApplyColorKey(image, r, g, b, a);
#else
Parallel.ForEach(texture.Images, image => ApplyColorKey(image, r, g, b, a));
#endif
}
/// <overloads>
/// <summary>
/// Resizes a texture/image.
/// </summary>
/// </overloads>
///
/// <summary>
/// Resizes a 2D texture or 3D (volume) texture.
/// </summary>
/// <param name="srcTexture">The input texture.</param>
/// <param name="srcMipIndex">The mipmap level of the input image.</param>
/// <param name="srcArrayOrFaceIndex">
/// The array index (or the face index for cube maps) of the input image. Must be 0 for volume
/// textures.
/// </param>
/// <param name="dstTexture">The output texture.</param>
/// <param name="dstMipIndex">The mipmap level of the output image.</param>
/// <param name="dstArrayOrFaceIndex">
/// The array index (or the face index for cube maps) of the output image. Must be 0 for volume
/// textures.
/// </param>
/// <param name="filter">The filter to use for resizing.</param>
/// <param name="alphaTransparency">
/// <see langword="true"/> if the image contains uses non-premultiplied alpha; otherwise,
/// <see langword="false"/> if the image uses premultiplied alpha or has no alpha.
/// </param>
/// <param name="wrapMode">
/// The texture address mode that will be used for sampling the at runtime.
/// </param>
public static void Resize(Texture srcTexture, int srcMipIndex, int srcArrayOrFaceIndex, Texture dstTexture, int dstMipIndex, int dstArrayOrFaceIndex, ResizeFilter filter, bool alphaTransparency, TextureAddressMode wrapMode)
{
Resize(srcTexture, srcMipIndex, srcArrayOrFaceIndex, dstTexture, dstMipIndex, dstArrayOrFaceIndex, GetFilter(filter), alphaTransparency, wrapMode);
}
private static void Tests(Texture texture)
{
//var testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//TextureHelper.FlipX(testTexture);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\FlipX.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//TextureHelper.FlipY(testTexture);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\FlipY.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//testTexture = TextureHelper.Rotate(testTexture, 90);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\Rotate90.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//testTexture = TextureHelper.Rotate(testTexture, 180);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\Rotate180.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//testTexture = TextureHelper.Rotate(testTexture, 270);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\Rotate270.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//var testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//testTexture = testTexture.Resize(1000, 1000, 1, ResizeFilter.Box, false, WrapMode.Clamp);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\Resize1000.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//testTexture = testTexture.Resize(200, 100, 1, ResizeFilter.Box, false, WrapMode.Clamp);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\Resize200x100.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//var testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//testTexture = testTexture.Resize(1024, 1024, 1, ResizeFilter.Box, true, WrapMode.Repeat);
//testTexture.GenerateMipmaps(ResizeFilter.Box, true, WrapMode.Repeat);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\Mipmaps.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//var testTexture = texture.ConvertTo(TextureFormat.BC1_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\BC1.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//testTexture = texture.ConvertTo(TextureFormat.BC2_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\BC2.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//testTexture = texture.ConvertTo(TextureFormat.BC3_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\BC3.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
}
private static void Resize(Texture srcTexture, int srcMipIndex, int srcArrayOrFaceIndex, Texture dstTexture, int dstMipIndex, int dstArrayOrFaceIndex, Filter filter, bool alphaTransparency, TextureAddressMode wrapMode)
{
if (srcTexture == null)
throw new ArgumentNullException("srcTexture");
if (dstTexture == null)
throw new ArgumentNullException("dstTexture");
if (srcTexture == dstTexture && srcMipIndex == dstMipIndex)
return;
int srcDepth = srcTexture.GetDepth(srcMipIndex);
int dstDepth = dstTexture.GetDepth(dstMipIndex);
if (srcDepth == dstDepth)
{
// Resize 2D.
int srcIndex = srcTexture.GetImageIndex(srcMipIndex, srcArrayOrFaceIndex, 0);
int srcWidth = srcTexture.Images[srcIndex].Width;
int srcHeight = srcTexture.Images[srcIndex].Height;
int dstIndex = dstTexture.GetImageIndex(dstMipIndex, dstArrayOrFaceIndex, 0);
int dstWidth = dstTexture.Images[dstIndex].Width;
int dstHeight = dstTexture.Images[dstIndex].Height;
var kernelX = new PolyphaseKernel(filter, srcWidth, dstWidth, 32);
var kernelY = new PolyphaseKernel(filter, srcHeight, dstHeight, 32);
#if SINGLE_THREADED
for (int z = 0; z < srcDepth; z++)
#else
Parallel.For(0, srcDepth, z =>
#endif
{
var srcImage = srcTexture.Images[srcTexture.GetImageIndex(srcMipIndex, srcArrayOrFaceIndex, z)];
var dstImage = dstTexture.Images[dstTexture.GetImageIndex(dstMipIndex, dstArrayOrFaceIndex, z)];
Resize2D(srcImage, dstImage, alphaTransparency, wrapMode, kernelX, kernelY);
}
#if !SINGLE_THREADED
);
#endif
}
else
{
// Resize 3D.
Resize3D(srcTexture, srcMipIndex, srcArrayOrFaceIndex, dstTexture, dstMipIndex, dstArrayOrFaceIndex, filter, alphaTransparency, wrapMode);
}
}
private static Texture DecodeSingleframe(ImagingFactory imagingFactory, WicFlags flags, TextureDescription description, Guid convertGuid, BitmapFrameDecode frame)
{
var texture = new Texture(description);
var image = texture.Images[0];
if (convertGuid == Guid.Empty)
{
frame.CopyPixels(image.Data, image.RowPitch);
}
else
{
using (var converter = new FormatConverter(imagingFactory))
{
converter.Initialize(frame, convertGuid, GetWicDither(flags), null, 0, BitmapPaletteType.Custom);
converter.CopyPixels(image.Data, image.RowPitch);
}
}
return texture;
}
/// <overloads>
/// <summary>
/// Rotates the texture/image counter-clockwise 0°, 90°, 180°, or 270°.
/// </summary>
/// </overloads>
///
/// <summary>
/// Rotates the specified texture counter-clockwise 0°, 90°, 180°, or 270°.
/// </summary>
/// <param name="texture">The texture.</param>
/// <param name="degrees">
/// The rotation angle in degrees. Allowed values: -360, -270, -180, -90, 0, 90, 180, 270, 360
/// </param>
/// <returns>The rotated texture.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="texture" /> is <see langword="null" />.
/// </exception>
/// <exception cref="ArgumentException">
/// Invalid rotation angle. Allowed values are -360, -270, -180, -90, 0, 90, 180, 270, 360.
/// </exception>
public static Texture Rotate(Texture texture, int degrees)
{
if (texture == null)
throw new ArgumentNullException("texture");
var description = texture.Description;
switch (degrees)
{
case -360:
case -180:
case 0:
case 180:
case 360:
break;
case -270:
case -90:
case 90:
case 270:
int width = description.Width;
int height = description.Height;
description.Width = height;
description.Height = width;
break;
default:
throw new ArgumentException("Allowed rotation angles are -360, -270, -180, -90, 0, 90, 180, 270, 360", "degrees");
}
var rotatedTexture = new Texture(description);
#if SINGLE_THREADED
for (int i = 0; i < texture.Images.Count; i++)
Rotate(texture.Images[i], rotatedTexture.Images[i], degrees);
#else
Parallel.For(0, texture.Images.Count, i => Rotate(texture.Images[i], rotatedTexture.Images[i], degrees));
#endif
return rotatedTexture;
}
private static Texture CopyImage(BinaryReader reader, TextureDescription description, ComputePitchFlags cpFlags, ConversionFlags convFlags, uint[] pal8)
{
if (reader == null)
throw new ArgumentNullException("reader");
if ((convFlags & ConversionFlags.Expand) != 0)
{
if ((convFlags & ConversionFlags.Format888) != 0)
cpFlags |= ComputePitchFlags.Bpp24;
else if ((convFlags & (ConversionFlags.Format565 | ConversionFlags.Format5551 | ConversionFlags.Format4444 | ConversionFlags.Format8332 | ConversionFlags.FormatA8P8 | ConversionFlags.FormatL16 | ConversionFlags.FormatA8L8)) != 0)
cpFlags |= ComputePitchFlags.Bpp16;
else if ((convFlags & (ConversionFlags.Format44 | ConversionFlags.Format332 | ConversionFlags.Pal8 | ConversionFlags.FormatL8)) != 0)
cpFlags |= ComputePitchFlags.Bpp8;
}
var texture = new Texture(description);
description = texture.Description; // MipLevel may have been set.
ScanlineFlags tflags = (convFlags & ConversionFlags.NoAlpha) != 0 ? ScanlineFlags.SetAlpha : 0;
if ((convFlags & ConversionFlags.Swizzle) != 0)
tflags |= ScanlineFlags.Legacy;
switch (description.Dimension)
{
case TextureDimension.Texture1D:
case TextureDimension.Texture2D:
case TextureDimension.TextureCube:
{
int index = 0;
for (int item = 0; item < description.ArraySize; ++item)
{
int width = description.Width;
int height = description.Height;
for (int level = 0; level < description.MipLevels; ++level, ++index)
{
int sRowPitch, sSlicePitch;
TextureHelper.ComputePitch(description.Format, width, height, out sRowPitch, out sSlicePitch, cpFlags);
var image = texture.Images[index];
if (TextureHelper.IsBCn(description.Format) || TextureHelper.IsPlanar(description.Format))
{
reader.Read(image.Data, 0, image.Data.Length);
}
else
{
using (var stream = new MemoryStream(image.Data))
using (var writer = new BinaryWriter(stream))
{
for (int h = 0; h < height; ++h)
{
if ((convFlags & ConversionFlags.Expand) != 0)
{
if ((convFlags & (ConversionFlags.Format565 | ConversionFlags.Format5551 | ConversionFlags.Format4444)) != 0)
{
if (!TextureHelper.ExpandScanline(reader, sRowPitch, (convFlags & ConversionFlags.Format565) != 0 ? DataFormat.B5G6R5_UNORM : DataFormat.B5G5R5A1_UNORM, writer, image.RowPitch, DataFormat.R8G8B8A8_UNORM, tflags))
throw new InvalidDataException("Unable to expand format.");
}
else
{
LegacyFormat lformat = FindLegacyFormat(convFlags);
if (!LegacyExpandScanline(reader, sRowPitch, lformat, writer, image.RowPitch, description.Format, pal8, tflags))
throw new InvalidDataException("Unable to expand legacy format.");
}
}
else if ((convFlags & ConversionFlags.Swizzle) != 0)
{
TextureHelper.SwizzleScanline(reader, sRowPitch, writer, image.RowPitch, description.Format, tflags);
}
else
{
TextureHelper.CopyScanline(reader, sRowPitch, writer, image.RowPitch, description.Format, tflags);
}
}
}
}
if (width > 1)
width >>= 1;
if (height > 1)
height >>= 1;
}
}
}
break;
case TextureDimension.Texture3D:
{
int index = 0;
int width = description.Width;
int height = description.Height;
int depth = description.Depth;
for (int level = 0; level < description.MipLevels; ++level)
{
int sRowPitch, sSlicePitch;
TextureHelper.ComputePitch(description.Format, width, height, out sRowPitch, out sSlicePitch, cpFlags);
for (int slice = 0; slice < depth; ++slice, ++index)
{
// We use the same memory organization that Direct3D 11 needs for D3D11_SUBRESOURCE_DATA
// with all slices of a given miplevel being continuous in memory
var image = texture.Images[index];
if (TextureHelper.IsBCn(description.Format))
{
reader.Read(image.Data, 0, image.Data.Length);
}
else if (TextureHelper.IsPlanar(description.Format))
{
// Direct3D does not support any planar formats for Texture3D
throw new NotSupportedException("Planar texture formats are not support for volume textures.");
}
else
{
using (var stream = new MemoryStream(image.Data))
using (var writer = new BinaryWriter(stream))
{
for (int h = 0; h < height; ++h)
{
if ((convFlags & ConversionFlags.Expand) != 0)
{
if ((convFlags & (ConversionFlags.Format565 | ConversionFlags.Format5551 | ConversionFlags.Format4444)) != 0)
{
if (!TextureHelper.ExpandScanline(reader, sRowPitch, (convFlags & ConversionFlags.Format565) != 0 ? DataFormat.B5G6R5_UNORM : DataFormat.B5G5R5A1_UNORM, writer, image.RowPitch, DataFormat.R8G8B8A8_UNORM, tflags))
throw new InvalidDataException("Unable to expand format.");
}
else
{
LegacyFormat lformat = FindLegacyFormat(convFlags);
if (!LegacyExpandScanline(reader, sRowPitch, lformat, writer, image.RowPitch, description.Format, pal8, tflags))
throw new InvalidDataException("Unable to expand legacy format.");
}
}
else if ((convFlags & ConversionFlags.Swizzle) != 0)
{
TextureHelper.SwizzleScanline(reader, sRowPitch, writer, image.RowPitch, description.Format, tflags);
}
else
{
TextureHelper.CopyScanline(reader, sRowPitch, writer, image.RowPitch, description.Format, tflags);
}
}
}
}
}
if (width > 1)
width >>= 1;
if (height > 1)
height >>= 1;
if (depth > 1)
depth >>= 1;
}
}
break;
default:
throw new NotSupportedException("The specified texture dimension is not supported.");
}
return texture;
}
/// <overloads>
/// <summary>
/// Scales the alpha values to create an equal alpha test coverage across all mipmap levels.
/// </summary>
/// </overloads>
///
/// <summary>
/// Scales the alpha values to create an equal alpha test coverage across all mipmap levels.
/// </summary>
/// <param name="texture">The texture (<see cref="DataFormat.R32G32B32A32_FLOAT"/>).</param>
/// <param name="referenceAlpha">The reference alpha.</param>
/// <param name="premultipliedAlpha">
/// <see langword="true"/> if texture uses premultiplied alpha.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="texture"/> is <see langword="null"/>.
/// </exception>
public static void ScaleAlphaToCoverage(Texture texture, float referenceAlpha, bool premultipliedAlpha)
{
// See http://the-witness.net/news/2010/09/computing-alpha-mipmaps/.
// Reference implementation:
// NVIDIA Texture Tools - http://code.google.com/p/nvidia-texture-tools/)
// file nvidia-texture-tools\src\nvimage\FloatImage.cpp, method scaleAlphaToCoverage()
// (Original code marked as "public domain".)
if (texture == null)
throw new ArgumentNullException("texture");
if (texture.Description.Dimension == TextureDimension.Texture3D)
throw new ArgumentException("Scaling alpha-to-coverage is not supported for volume textures.");
int mipLevels = texture.Description.MipLevels;
int arraySize = texture.Description.ArraySize;
#if SINGLE_THREADED
for (int arrayIndex = 0; arrayIndex < arraySize; arrayIndex++)
#else
Parallel.For(0, arraySize, arrayIndex =>
#endif
{
int index0 = texture.GetImageIndex(0, arrayIndex, 0);
float coverage = GetAlphaTestCoverage(texture.Images[index0], referenceAlpha);
#if SINGLE_THREADED
for (int mipIndex = 0; mipIndex < mipLevels; mipIndex++)
#else
Parallel.For(1, mipLevels, mipIndex =>
#endif
{
int index = texture.GetImageIndex(mipIndex, arrayIndex, 0);
ScaleAlphaToCoverage(texture.Images[index], referenceAlpha, coverage, premultipliedAlpha);
}
#if !SINGLE_THREADED
);
#endif
}
#if !SINGLE_THREADED
);
#endif
}
/// <summary>
/// Applies color keying to the specified texture (<see cref="DataFormat.R32G32B32A32_FLOAT"/>).
/// </summary>
/// <param name="texture">The texture (<see cref="DataFormat.R32G32B32A32_FLOAT"/>).</param>
/// <param name="colorKey">Color of the color key.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="texture"/> is <see langword="null"/>.
/// </exception>
public static void ApplyColorKey(Texture texture, Vector4F colorKey)
{
if (texture == null)
throw new ArgumentNullException("texture");
#if SINGLE_THREADED
foreach (var image in texture.Images)
ApplyColorKey(image, colorKey);
#else
Parallel.ForEach(texture.Images, image => ApplyColorKey(image, colorKey));
#endif
}
private static void Tests(Texture texture)
{
//var testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//TextureHelper.FlipX(testTexture);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\FlipX.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//TextureHelper.FlipY(testTexture);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\FlipY.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//testTexture = TextureHelper.Rotate(testTexture, 90);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\Rotate90.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//testTexture = TextureHelper.Rotate(testTexture, 180);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\Rotate180.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//testTexture = TextureHelper.Rotate(testTexture, 270);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\Rotate270.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//var testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//testTexture = testTexture.Resize(1000, 1000, 1, ResizeFilter.Box, false, WrapMode.Clamp);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\Resize1000.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//testTexture = testTexture.Resize(200, 100, 1, ResizeFilter.Box, false, WrapMode.Clamp);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\Resize200x100.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//var testTexture = texture.ConvertTo(TextureFormat.R32G32B32A32_Float);
//testTexture = testTexture.Resize(1024, 1024, 1, ResizeFilter.Box, true, WrapMode.Repeat);
//testTexture.GenerateMipmaps(ResizeFilter.Box, true, WrapMode.Repeat);
//testTexture = testTexture.ConvertTo(TextureFormat.R8G8B8A8_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\Mipmaps.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//var testTexture = texture.ConvertTo(TextureFormat.BC1_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\BC1.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//testTexture = texture.ConvertTo(TextureFormat.BC2_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\BC2.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
//testTexture = texture.ConvertTo(TextureFormat.BC3_UNorm);
//using (var stream = File.OpenWrite("c:\\temp\\BC3.dds"))
// DdsHelper.Save(testTexture, stream, DdsFlags.None);
}
/// <overloads>
/// <summary>
/// Expands the texture/image from unsigned normalized values [0, 1] to signed normalized values
/// [-1, 1]. (Assumes input data is normal map!)
/// </summary>
/// </overloads>
///
/// <summary>
/// Expands the texture from unsigned normalized values [0, 1] to signed normalized values
/// [-1, 1]. (Assumes input data is normal map!)
/// </summary>
/// <param name="texture">The texture (<see cref="DataFormat.R32G32B32A32_FLOAT"/>).</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="texture"/> is <see langword="null"/>.
/// </exception>
public static void UnpackNormals(Texture texture)
{
if (texture == null)
throw new ArgumentNullException("texture");
#if SINGLE_THREADED
foreach (var image in texture.Images)
UnpackNormals(image);
#else
Parallel.ForEach(texture.Images, UnpackNormals);
#endif
}
/// <summary>
/// Resizes the texture. (If original texture has mipmaps, all mipmap levels are automatically
/// recreated.)
/// </summary>
/// <param name="width">The new width.</param>
/// <param name="height">The new height.</param>
/// <param name="depth">The new depth. Must be 1 for 2D textures and cube map textures.</param>
/// <param name="filter">The filter to use for resizing.</param>
/// <param name="alphaTransparency">
/// <see langword="true"/> if the image contains uses non-premultiplied alpha; otherwise,
/// <see langword="false"/> if the image uses premultiplied alpha or has no alpha.
/// </param>
/// <param name="wrapMode">
/// The texture address mode that will be used for sampling the at runtime.
/// </param>
/// <returns>The resized texture.</returns>
public Texture Resize(int width, int height, int depth, ResizeFilter filter, bool alphaTransparency, TextureAddressMode wrapMode)
{
var description = Description;
description.Width = width;
description.Height = height;
description.Depth = depth;
var resizedTexture = new Texture(description);
// Resize mipmap level 0.
for (int arrayIndex = 0; arrayIndex < description.ArraySize; arrayIndex++)
TextureHelper.Resize(this, 0, arrayIndex, resizedTexture, 0, arrayIndex, filter, alphaTransparency, wrapMode);
// Regenerate mipmap levels, if necessary.
if (description.MipLevels > 1)
resizedTexture.GenerateMipmaps(filter, alphaTransparency, wrapMode);
return resizedTexture;
}
/// <summary>
/// Initializes a new instance of the <see cref="VolumeAccessor"/> struct.
/// </summary>
/// <param name="texture">The volume texture.</param>
/// <param name="mipIndex">The mipmap level.</param>
/// <param name="arrayOrFaceIndex">
/// The array index for texture arrays, or the face index for cube maps. Must be 0 for volume
/// textures.
/// </param>
public VolumeAccessor(Texture texture, int mipIndex, int arrayOrFaceIndex)
{
if (texture == null)
throw new ArgumentNullException("texture");
int index = texture.GetImageIndex(mipIndex, arrayOrFaceIndex, 0);
var image = texture.Images[index];
_width = image.Width;
_height = image.Height;
_depth = texture.Description.Depth;
_handles = new GCHandle[_depth];
_intPtrs = new IntPtr[_depth];
for (int z = 0; z < _depth; z++)
{
image = texture.Images[index + z];
_handles[z] = GCHandle.Alloc(image.Data, GCHandleType.Pinned);
_intPtrs[z] = _handles[z].AddrOfPinnedObject();
}
}
