protected override bool TryCopyFrom(BitmapContent sourceBitmap, Rectangle sourceRegion, Rectangle destinationRegion)
{
SurfaceFormat sourceFormat;
if (!sourceBitmap.TryGetFormat(out sourceFormat))
return false;
SurfaceFormat format;
TryGetFormat(out format);
// A shortcut for copying the entire bitmap to another bitmap of the same type and format
if (format == sourceFormat && (sourceRegion == new Rectangle(0, 0, Width, Height)) && sourceRegion == destinationRegion)
{
SetPixelData(sourceBitmap.GetPixelData());
return true;
}
// Destination region copy is not yet supported
if (destinationRegion != new Rectangle(0, 0, Width, Height))
return false;
// If the source is not Vector4 or requires resizing, send it through BitmapContent.Copy
if (!(sourceBitmap is PixelBitmapContent<Vector4>) || sourceRegion.Width != destinationRegion.Width || sourceRegion.Height != destinationRegion.Height)
{
try
{
BitmapContent.Copy(sourceBitmap, sourceRegion, this, destinationRegion);
return true;
}
catch (InvalidOperationException)
{
return false;
}
}
//SquishFlags targetFormat = SquishFlags.ColourClusterFit;
Format outputFormat = Format.DXT1;
switch (format)
{
case SurfaceFormat.Dxt1:
outputFormat = Format.DXT1;
break;
case SurfaceFormat.Dxt1SRgb:
outputFormat = Format.DXT1;
break;
case SurfaceFormat.Dxt3:
outputFormat = Format.DXT3;
break;
case SurfaceFormat.Dxt3SRgb:
outputFormat = Format.DXT3;
break;
case SurfaceFormat.Dxt5:
outputFormat = Format.DXT5;
break;
case SurfaceFormat.Dxt5SRgb:
outputFormat = Format.DXT5;
break;
default:
return false;
}
// libsquish requires RGBA8888
var colorBitmap = new PixelBitmapContent<Color>(sourceBitmap.Width, sourceBitmap.Height);
BitmapContent.Copy(sourceBitmap, colorBitmap);
var sourceData = colorBitmap.GetPixelData();
/*
var dataSize = Squish.GetStorageRequirements(colorBitmap.Width, colorBitmap.Height, targetFormat);
var data = new byte[dataSize];
var metric = new float[] { 1.0f, 1.0f, 1.0f };
Squish.CompressImage(sourceData, colorBitmap.Width, colorBitmap.Height, data, targetFormat, metric);
SetPixelData(data);
*/
var dxtCompressor = new Compressor();
var inputOptions = new InputOptions();
if (outputFormat != Format.DXT1)
inputOptions.SetAlphaMode(AlphaMode.Premultiplied);
else
inputOptions.SetAlphaMode(AlphaMode.None);
inputOptions.SetTextureLayout(TextureType.Texture2D, colorBitmap.Width, colorBitmap.Height, 1);
// Small hack here. NVTT wants 8bit data in BGRA. Flip the B and R channels
// again here.
GraphicsUtil.BGRAtoRGBA(sourceData);
var dataHandle = GCHandle.Alloc(sourceData, GCHandleType.Pinned);
try
{
var dataPtr = dataHandle.AddrOfPinnedObject();
inputOptions.SetMipmapData(dataPtr, colorBitmap.Width, colorBitmap.Height, 1, 0, 0);
inputOptions.SetMipmapGeneration(false);
inputOptions.SetGamma(1.0f, 1.0f);
var outputOptions = new OutputOptions();
outputOptions.SetOutputHeader(false);
var handler = new DxtDataHandler(this);
outputOptions.SetOutputHandler(handler.BeginImage, handler.WriteData);
var compressionOptions = new CompressionOptions();
compressionOptions.SetFormat(outputFormat);
compressionOptions.SetQuality(Quality.Normal);
dxtCompressor.Compress(inputOptions, compressionOptions, outputOptions);
}
finally
{
dataHandle.Free ();
}
return true;
}
private static void CompressDxt(TextureContent content, bool generateMipmaps)
{
var texData = content.Faces[0][0];
if (!IsPowerOfTwo(texData.Width) || !IsPowerOfTwo(texData.Height))
throw new PipelineException("DXT Compressed textures width and height must be powers of two.");
var _dxtCompressor = new Compressor();
var inputOptions = new InputOptions();
inputOptions.SetAlphaMode(AlphaMode.Transparency);
inputOptions.SetTextureLayout(TextureType.Texture2D, texData.Width, texData.Height, 1);
var pixelData = texData.GetPixelData();
// Small hack here. NVTT wants 8bit data in BGRA. Flip the B and R channels
// again here.
GraphicsUtil.BGRAtoRGBA(pixelData);
var dataHandle = GCHandle.Alloc(pixelData, GCHandleType.Pinned);
var dataPtr = dataHandle.AddrOfPinnedObject();
inputOptions.SetMipmapData(dataPtr, texData.Width, texData.Height, 1, 0, 0);
inputOptions.SetMipmapGeneration(generateMipmaps);
var containsFracAlpha = ContainsFractionalAlpha(pixelData);
var outputOptions = new OutputOptions();
outputOptions.SetOutputHeader(false);
var outputFormat = containsFracAlpha ? Format.DXT5 : Format.DXT1;
var handler = new DxtDataHandler(content, outputFormat);
outputOptions.SetOutputHandler(handler.BeginImage, handler.WriteData);
var compressionOptions = new CompressionOptions();
compressionOptions.SetFormat(outputFormat);
compressionOptions.SetQuality(Quality.Fastest);
_dxtCompressor.Compress(inputOptions, compressionOptions, outputOptions);
dataHandle.Free();
}
/// <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>
/// 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;
}
private static void CompressDxt(GraphicsProfile profile, TextureContent content, bool generateMipmaps, bool premultipliedAlpha, bool sharpAlpha)
{
var texData = content.Faces[0][0];
if (profile == GraphicsProfile.Reach)
{
if (!IsPowerOfTwo(texData.Width) || !IsPowerOfTwo(texData.Height))
throw new PipelineException("DXT Compressed textures width and height must be powers of two in GraphicsProfile.Reach.");
}
var pixelData = texData.GetPixelData();
// Test the alpha channel to figure out if we have alpha.
var containsAlpha = false;
var containsFracAlpha = false;
for (var x = 3; x < pixelData.Length; x += 4)
{
if (pixelData[x] != 0xFF)
{
containsAlpha = true;
if (pixelData[x] != 0x0)
containsFracAlpha = true;
}
}
var _dxtCompressor = new Compressor();
var inputOptions = new InputOptions();
if (containsAlpha)
inputOptions.SetAlphaMode(premultipliedAlpha ? AlphaMode.Premultiplied : AlphaMode.Transparency);
else
inputOptions.SetAlphaMode(AlphaMode.None);
inputOptions.SetTextureLayout(TextureType.Texture2D, texData.Width, texData.Height, 1);
// Small hack here. NVTT wants 8bit data in BGRA. Flip the B and R channels
// again here.
GraphicsUtil.BGRAtoRGBA(pixelData);
var dataHandle = GCHandle.Alloc(pixelData, GCHandleType.Pinned);
var dataPtr = dataHandle.AddrOfPinnedObject();
inputOptions.SetMipmapData(dataPtr, texData.Width, texData.Height, 1, 0, 0);
inputOptions.SetMipmapGeneration(generateMipmaps);
inputOptions.SetGamma(1.0f, 1.0f);
var outputOptions = new OutputOptions();
outputOptions.SetOutputHeader(false);
var outputFormat = Format.DXT1;
if (containsFracAlpha)
{
if (sharpAlpha)
outputFormat = Format.DXT3;
else
outputFormat = Format.DXT5;
}
var handler = new DxtDataHandler(content, outputFormat);
outputOptions.SetOutputHandler(handler.BeginImage, handler.WriteData);
var compressionOptions = new CompressionOptions();
compressionOptions.SetFormat(outputFormat);
compressionOptions.SetQuality(Quality.Normal);
_dxtCompressor.Compress(inputOptions, compressionOptions, outputOptions);
dataHandle.Free();
}