private static void CompressDxt(GraphicsProfile profile, TextureContent content, bool generateMipmaps)
{
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 _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();
}
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(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();
}