protected override bool TryCopyFrom(BitmapContent sourceBitmap, Rectangle sourceRegion, Rectangle destinationRegion)
{
SurfaceFormat sourceFormat;
if (!sourceBitmap.TryGetFormat(out sourceFormat))
{
return(false);
}
// A shortcut for copying the entire bitmap to another bitmap of the same type and format
if (SurfaceFormat.RgbEtc1 == 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);
}
}
// Create the texture object in the PVR library
var sourceData = sourceBitmap.GetPixelData();
var rgba32F = (PixelFormat)0x2020202061626772; // static const PixelType PVRStandard32PixelType = PixelType('r', 'g', 'b', 'a', 32, 32, 32, 32);
using (var pvrTexture = PVRTexture.CreateTexture(sourceData, (uint)sourceBitmap.Width, (uint)sourceBitmap.Height, 1,
rgba32F, true, VariableType.Float, ColourSpace.lRGB))
{
// Resize the bitmap if needed
if ((sourceBitmap.Width != Width) || (sourceBitmap.Height != Height))
{
pvrTexture.Resize((uint)Width, (uint)Height, 1, ResizeMode.Cubic);
}
pvrTexture.Transcode(PixelFormat.ETC1, VariableType.UnsignedByte, ColourSpace.lRGB /*, CompressorQuality.ETCMediumPerceptual, true*/);
var texDataSize = pvrTexture.GetTextureDataSize(0);
var texData = new byte[texDataSize];
pvrTexture.GetTextureData(texData, texDataSize);
SetPixelData(texData);
}
return(true);
}
protected override bool TryCopyFrom(BitmapContent sourceBitmap, Rectangle sourceRegion, Rectangle destinationRegion)
{
SurfaceFormat sourceFormat;
if (!sourceBitmap.TryGetFormat(out sourceFormat))
return false;
// A shortcut for copying the entire bitmap to another bitmap of the same type and format
if (SurfaceFormat.RgbEtc1 == 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;
}
}
// Create the texture object in the PVR library
var sourceData = sourceBitmap.GetPixelData();
var rgba32F = (PixelFormat)0x2020202061626772; // static const PixelType PVRStandard32PixelType = PixelType('r', 'g', 'b', 'a', 32, 32, 32, 32);
using (var pvrTexture = PVRTexture.CreateTexture(sourceData, (uint)sourceBitmap.Width, (uint)sourceBitmap.Height, 1,
rgba32F, true, VariableType.Float, ColourSpace.lRGB))
{
// Resize the bitmap if needed
if ((sourceBitmap.Width != Width) || (sourceBitmap.Height != Height))
pvrTexture.Resize((uint)Width, (uint)Height, 1, ResizeMode.Cubic);
pvrTexture.Transcode(PixelFormat.ETC1, VariableType.UnsignedByte, ColourSpace.lRGB /*, CompressorQuality.ETCMediumPerceptual, true*/);
var texDataSize = pvrTexture.GetTextureDataSize(0);
var texData = new byte[texDataSize];
pvrTexture.GetTextureData(texData, texDataSize);
SetPixelData(texData);
}
return true;
}
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;
}
}
// Convert to full colour 32-bit format. Floating point would be preferred for processing, but it appears the ATICompressor does not support this
var colorBitmap = new PixelBitmapContent<Color>(sourceRegion.Width, sourceRegion.Height);
BitmapContent.Copy(sourceBitmap, sourceRegion, colorBitmap, new Rectangle(0, 0, colorBitmap.Width, colorBitmap.Height));
sourceBitmap = colorBitmap;
ATICompressor.CompressionFormat targetFormat;
switch (format)
{
case SurfaceFormat.RgbaAtcExplicitAlpha:
targetFormat = ATICompressor.CompressionFormat.AtcRgbaExplicitAlpha;
break;
case SurfaceFormat.RgbaAtcInterpolatedAlpha:
targetFormat = ATICompressor.CompressionFormat.AtcRgbaInterpolatedAlpha;
break;
default:
return false;
}
var sourceData = sourceBitmap.GetPixelData();
var compressedData = ATICompressor.Compress(sourceData, Width, Height, targetFormat);
SetPixelData(compressedData);
return true;
}
/// <summary>
/// Copies one bitmap into another.
/// The destination bitmap can be in any format and size. If the destination is larger or smaller, the source bitmap is scaled accordingly.
/// </summary>
/// <param name="sourceBitmap">BitmapContent being copied.</param>
/// <param name="sourceRegion">Region of sourceBitmap.</param>
/// <param name="destinationBitmap">BitmapContent being overwritten.</param>
/// <param name="destinationRegion">Region of bitmap to be overwritten.</param>
public static void Copy(BitmapContent sourceBitmap, Rectangle sourceRegion, BitmapContent destinationBitmap, Rectangle destinationRegion)
{
ValidateCopyArguments(sourceBitmap, sourceRegion, destinationBitmap, destinationRegion);
SurfaceFormat sourceFormat;
if (!sourceBitmap.TryGetFormat(out sourceFormat))
{
throw new InvalidOperationException("Could not retrieve surface format of source bitmap");
}
SurfaceFormat destinationFormat;
if (!destinationBitmap.TryGetFormat(out destinationFormat))
{
throw new InvalidOperationException("Could not retrieve surface format of destination bitmap");
}
// If the formats are the same and the regions are the full bounds of the bitmaps and they are the same size, do a simpler copy
if (sourceFormat == destinationFormat && sourceRegion == destinationRegion &&
sourceRegion == new Rectangle(0, 0, sourceBitmap.Width, sourceBitmap.Height) &&
destinationRegion == new Rectangle(0, 0, destinationBitmap.Width, destinationBitmap.Height))
{
destinationBitmap.SetPixelData(sourceBitmap.GetPixelData());
return;
}
// The basic process is
// 1. Copy from source bitmap region to a new PixelBitmapContent<Vector4> using sourceBitmap.TryCopyTo()
// 2. If source and destination regions are a different size, resize Vector4 version
// 3. Copy from Vector4 to destination region using destinationBitmap.TryCopyFrom()
// Copy from the source to the intermediate Vector4 format
var intermediate = new PixelBitmapContent <Vector4>(sourceRegion.Width, sourceRegion.Height);
var intermediateRegion = new Rectangle(0, 0, intermediate.Width, intermediate.Height);
if (sourceBitmap.TryCopyTo(intermediate, sourceRegion, intermediateRegion))
{
// Resize the intermediate if required
if (intermediate.Width != destinationRegion.Width || intermediate.Height != destinationRegion.Height)
{
intermediate = intermediate.Resize(destinationRegion.Width, destinationRegion.Height) as PixelBitmapContent <Vector4>;
}
// Copy from the intermediate to the destination
if (destinationBitmap.TryCopyFrom(intermediate, new Rectangle(0, 0, intermediate.Width, intermediate.Height), destinationRegion))
{
return;
}
}
// If we got here, one of the above steps didn't work
throw new InvalidOperationException("Could not copy between " + sourceFormat + " and " + destinationFormat);
}
internal static BitmapContent Resize(this BitmapContent bitmap, int newWidth, int newHeight)
{
BitmapContent src = bitmap;
SurfaceFormat format;
src.TryGetFormat(out format);
if (format != SurfaceFormat.Vector4)
{
var v4 = new PixelBitmapContent <Vector4>(src.Width, src.Height);
BitmapContent.Copy(src, v4);
src = v4;
}
// Convert to FreeImage bitmap
var bytes = src.GetPixelData();
var fi = FreeImage.ConvertFromRawBits(bytes, FREE_IMAGE_TYPE.FIT_RGBAF, src.Width, src.Height, SurfaceFormat.Vector4.GetSize() * src.Width, 128, 0, 0, 0, true);
// Resize
var newfi = FreeImage.Rescale(fi, newWidth, newHeight, FREE_IMAGE_FILTER.FILTER_BICUBIC);
FreeImage.UnloadEx(ref fi);
// Convert back to PixelBitmapContent<Vector4>
src = new PixelBitmapContent <Vector4>(newWidth, newHeight);
bytes = new byte[SurfaceFormat.Vector4.GetSize() * newWidth * newHeight];
FreeImage.ConvertToRawBits(bytes, newfi, SurfaceFormat.Vector4.GetSize() * newWidth, 128, 0, 0, 0, true);
src.SetPixelData(bytes);
FreeImage.UnloadEx(ref newfi);
// Convert back to source type if required
if (format != SurfaceFormat.Vector4)
{
var s = (BitmapContent)Activator.CreateInstance(bitmap.GetType(), new object[] { newWidth, newHeight });
BitmapContent.Copy(src, s);
src = s;
}
return(src);
}
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;
}
/// <summary>
/// Copies one bitmap into another.
/// The destination bitmap can be in any format and size. If the destination is larger or smaller, the source bitmap is scaled accordingly.
/// </summary>
/// <param name="sourceBitmap">BitmapContent being copied.</param>
/// <param name="sourceRegion">Region of sourceBitmap.</param>
/// <param name="destinationBitmap">BitmapContent being overwritten.</param>
/// <param name="destinationRegion">Region of bitmap to be overwritten.</param>
public static void Copy(BitmapContent sourceBitmap, Rectangle sourceRegion, BitmapContent destinationBitmap, Rectangle destinationRegion)
{
ValidateCopyArguments(sourceBitmap, sourceRegion, destinationBitmap, destinationRegion);
SurfaceFormat sourceFormat;
if (!sourceBitmap.TryGetFormat(out sourceFormat))
throw new InvalidOperationException("Could not retrieve surface format of source bitmap");
SurfaceFormat destinationFormat;
if (!destinationBitmap.TryGetFormat(out destinationFormat))
throw new InvalidOperationException("Could not retrieve surface format of destination bitmap");
// If the formats are the same and the regions are the full bounds of the bitmaps and they are the same size, do a simpler copy
if (sourceFormat == destinationFormat && sourceRegion == destinationRegion
&& sourceRegion == new Rectangle(0, 0, sourceBitmap.Width, sourceBitmap.Height)
&& destinationRegion == new Rectangle(0, 0, destinationBitmap.Width, destinationBitmap.Height))
{
destinationBitmap.SetPixelData(sourceBitmap.GetPixelData());
return;
}
// The basic process is
// 1. Copy from source bitmap region to a new PixelBitmapContent<Vector4> using sourceBitmap.TryCopyTo()
// 2. If source and destination regions are a different size, resize Vector4 version
// 3. Copy from Vector4 to destination region using destinationBitmap.TryCopyFrom()
// Copy from the source to the intermediate Vector4 format
var intermediate = new PixelBitmapContent<Vector4>(sourceRegion.Width, sourceRegion.Height);
var intermediateRegion = new Rectangle(0, 0, intermediate.Width, intermediate.Height);
if (sourceBitmap.TryCopyTo(intermediate, sourceRegion, intermediateRegion))
{
// Resize the intermediate if required
if (intermediate.Width != destinationRegion.Width || intermediate.Height != destinationRegion.Height)
intermediate = intermediate.Resize(destinationRegion.Width, destinationRegion.Height) as PixelBitmapContent<Vector4>;
// Copy from the intermediate to the destination
if (destinationBitmap.TryCopyFrom(intermediate, new Rectangle(0, 0, intermediate.Width, intermediate.Height), destinationRegion))
return;
}
// If we got here, one of the above steps didn't work
throw new InvalidOperationException("Could not copy between " + sourceFormat + " and " + destinationFormat);
}
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);
}
// TODO: Add a XNA unit test to see what it does
// my guess is that this is invalid for DXT.
//
// 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);
}
}
// NVTT wants 8bit data in BGRA format.
var colorBitmap = new PixelBitmapContent <Color>(sourceBitmap.Width, sourceBitmap.Height);
BitmapContent.Copy(sourceBitmap, colorBitmap);
var sourceData = colorBitmap.GetPixelData();
var dataHandle = GCHandle.Alloc(sourceData, GCHandleType.Pinned);
AlphaMode alphaMode;
Format outputFormat;
var alphaDither = false;
switch (format)
{
case SurfaceFormat.Dxt1:
case SurfaceFormat.Dxt1SRgb:
{
bool hasTransparency;
PrepareNVTT_DXT1(sourceData, out hasTransparency);
outputFormat = hasTransparency ? Format.DXT1a : Format.DXT1;
alphaMode = hasTransparency ? AlphaMode.Transparency : AlphaMode.None;
alphaDither = true;
break;
}
case SurfaceFormat.Dxt3:
case SurfaceFormat.Dxt3SRgb:
{
PrepareNVTT(sourceData);
outputFormat = Format.DXT3;
alphaMode = AlphaMode.Transparency;
break;
}
case SurfaceFormat.Dxt5:
case SurfaceFormat.Dxt5SRgb:
{
PrepareNVTT(sourceData);
outputFormat = Format.DXT5;
alphaMode = AlphaMode.Transparency;
break;
}
default:
throw new InvalidOperationException("Invalid DXT surface format!");
}
// Do all the calls to the NVTT wrapper within this handler
// so we properly clean up if things blow up.
try
{
var dataPtr = dataHandle.AddrOfPinnedObject();
var inputOptions = new InputOptions();
inputOptions.SetTextureLayout(TextureType.Texture2D, colorBitmap.Width, colorBitmap.Height, 1);
inputOptions.SetMipmapData(dataPtr, colorBitmap.Width, colorBitmap.Height, 1, 0, 0);
inputOptions.SetMipmapGeneration(false);
inputOptions.SetGamma(1.0f, 1.0f);
inputOptions.SetAlphaMode(alphaMode);
var compressionOptions = new CompressionOptions();
compressionOptions.SetFormat(outputFormat);
compressionOptions.SetQuality(Quality.Normal);
// TODO: This isn't working which keeps us from getting the
// same alpha dither behavior on DXT1 as XNA.
//
// See https://github.com/MonoGame/MonoGame/issues/6259
//
//if (alphaDither)
//compressionOptions.SetQuantization(false, false, true);
var outputOptions = new OutputOptions();
outputOptions.SetOutputHeader(false);
outputOptions.SetOutputOptionsOutputHandler(NvttBeginImage, NvttWriteImage, NvttEndImage);
var dxtCompressor = new Compressor();
dxtCompressor.Compress(inputOptions, compressionOptions, outputOptions);
}
finally
{
dataHandle.Free();
}
return(true);
}
protected override bool TryCopyFrom(BitmapContent sourceBitmap, Rectangle sourceRegion, Rectangle destinationRegion)
{
SurfaceFormat sourceFormat;
if (!sourceBitmap.TryGetFormat(out sourceFormat))
{
return(false);
}
// 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);
}
// 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);
}
}
// Convert from a Vector4 format
var src = sourceBitmap as PixelBitmapContent <Vector4>;
if (default(T) is IPackedVector)
{
Parallel.For(0, sourceRegion.Height, (y) =>
{
var pixel = default(T);
var p = (IPackedVector)pixel;
var row = src.GetRow(sourceRegion.Top + y);
for (int x = 0; x < sourceRegion.Width; ++x)
{
p.PackFromVector4(row[sourceRegion.Left + x]);
pixel = (T)p;
SetPixel(destinationRegion.Left + x, destinationRegion.Top + y, pixel);
}
});
}
else
{
var converter = new Vector4Converter() as IVector4Converter <T>;
// If no converter could be created, converting from this format is not supported
if (converter == null)
{
return(false);
}
Parallel.For(0, sourceRegion.Height, (y) =>
{
var row = src.GetRow(sourceRegion.Top + y);
for (int x = 0; x < sourceRegion.Width; ++x)
{
SetPixel(destinationRegion.Left + x, destinationRegion.Top + y, converter.FromVector4(row[sourceRegion.Left + x]));
}
});
}
return(true);
}
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);
}
}
// Convert to full colour 32-bit format. Floating point would be preferred for processing, but it appears the ATICompressor does not support this
var colorBitmap = new PixelBitmapContent <Color>(sourceRegion.Width, sourceRegion.Height);
BitmapContent.Copy(sourceBitmap, sourceRegion, colorBitmap, new Rectangle(0, 0, colorBitmap.Width, colorBitmap.Height));
sourceBitmap = colorBitmap;
ATICompressor.CompressionFormat targetFormat;
switch (format)
{
case SurfaceFormat.RgbaAtcExplicitAlpha:
targetFormat = ATICompressor.CompressionFormat.AtcRgbaExplicitAlpha;
break;
case SurfaceFormat.RgbaAtcInterpolatedAlpha:
targetFormat = ATICompressor.CompressionFormat.AtcRgbaInterpolatedAlpha;
break;
default:
return(false);
}
var sourceData = sourceBitmap.GetPixelData();
var compressedData = ATICompressor.Compress(sourceData, Width, Height, targetFormat);
SetPixelData(compressedData);
return(true);
}
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);
}
