public static byte[] WicResize(IWICComponentFactory factory, IWICBitmapFrameDecode frame, int width,
int height, int quality)
{
// Prepare output stream to cache file
var outputStream = new MemoryIStream();
// Prepare PNG encoder
var encoder = factory.CreateEncoder(Consts.GUID_ContainerFormatJpeg, null);
encoder.Initialize(outputStream, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
// Prepare output frame
IWICBitmapFrameEncode outputFrame;
var arg = new IPropertyBag2[1];
encoder.CreateNewFrame(out outputFrame, arg);
var propBag = arg[0];
var propertyBagOption = new PROPBAG2[1];
propertyBagOption[0].pstrName = "ImageQuality";
propBag.Write(1, propertyBagOption, new object[] { ((float)quality) / 100 });
outputFrame.Initialize(propBag);
double dpiX, dpiY;
frame.GetResolution(out dpiX, out dpiY);
outputFrame.SetResolution(dpiX, dpiY);
uint ow, oh, w, h;
frame.GetSize(out ow, out oh);
if (ow > oh)
{
w = (uint)width;
h = (uint)((double)height * (double)oh / (double)ow);
}
else
{
w = (uint)((double)height * (double)ow / (double)oh);
h = (uint)height;
}
outputFrame.SetSize(w, h);
// Prepare scaler
var scaler = factory.CreateBitmapScaler();
scaler.Initialize(frame, w, h, WICBitmapInterpolationMode.WICBitmapInterpolationModeFant);
// Write the scaled source to the output frame
outputFrame.WriteSource(scaler, new WICRect {
X = 0, Y = 0, Width = (int)width, Height = (int)height
});
outputFrame.Commit();
encoder.Commit();
var outputArray = outputStream.ToArray();
outputStream.Close();
Marshal.ReleaseComObject(outputFrame);
Marshal.ReleaseComObject(scaler);
Marshal.ReleaseComObject(propBag);
Marshal.ReleaseComObject(encoder);
return(outputArray);
}
public static void Write <T>(this IPropertyBag2 bag, string name, T val) where T : unmanaged
{
var prop = new PROPBAG2 {
pstrName = name
};
var pvar = new UnmanagedPropVariant();
if (typeof(T) == typeof(bool))
{
pvar.vt = VarEnum.VT_BOOL;
pvar.int16Value = (bool)(object)val ? (short)-1 : (short)0;
}
else if (typeof(T) == typeof(byte))
{
pvar.vt = VarEnum.VT_UI1;
pvar.byteValue = (byte)(object)val;
}
else if (typeof(T) == typeof(float))
{
pvar.vt = VarEnum.VT_R4;
pvar.floatValue = (float)(object)val;
}
else
{
throw new ArgumentException("Marshaling not implemented for type: " + typeof(T).Name, nameof(T));
}
ProxyFunctions.PropertyBagWrite(bag, 1, prop, pvar);
}
/// <summary>
/// Sets the value of the property with this name
/// </summary>
/// <param name="name">The name.</param>
/// <param name="value">The value.</param>
public void Set(string name, object value)
{
CheckIfInitialized();
// In order to set a property in the property bag
// we need to convert the value to the destination type
var previousValue = Get(name);
value = Convert.ChangeType(value, previousValue == null?value.GetType() : previousValue.GetType());
// Set the property
var propbag2 = new PROPBAG2()
{
Name = name
};
var result = nativePropertyBag.Write(1, ref propbag2, value);
result.CheckError();
propbag2.Dispose();
}
/// <summary>
/// Gets the value of the property with this name.
/// </summary>
/// <param name="name">The name.</param>
/// <returns>Value of the property</returns>
public object Get(string name)
{
CheckIfInitialized();
object value;
var propbag2 = new PROPBAG2()
{
Name = name
};
Result error;
// Gets the property
var result = nativePropertyBag.Read(1, ref propbag2, IntPtr.Zero, out value, out error);
if (result.Failure || error.Failure)
{
throw new InvalidOperationException(string.Format(System.Globalization.CultureInfo.InvariantCulture, "Property with name [{0}] is not valid for this instance", name));
}
propbag2.Dispose();
return(value);
}
public static byte[] WicResize(IWICComponentFactory factory, IWICBitmapFrameDecode frame, int width,
int height, int quality)
{
// Prepare output stream to cache file
var outputStream = new MemoryIStream();
// Prepare PNG encoder
var encoder = factory.CreateEncoder(Consts.GUID_ContainerFormatJpeg, null);
encoder.Initialize(outputStream, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
// Prepare output frame
IWICBitmapFrameEncode outputFrame;
var arg = new IPropertyBag2[1];
encoder.CreateNewFrame(out outputFrame, arg);
var propBag = arg[0];
var propertyBagOption = new PROPBAG2[1];
propertyBagOption[0].pstrName = "ImageQuality";
propBag.Write(1, propertyBagOption, new object[] {((float) quality)/100});
outputFrame.Initialize(propBag);
double dpiX, dpiY;
frame.GetResolution(out dpiX, out dpiY);
outputFrame.SetResolution(dpiX, dpiY);
uint ow, oh, w, h;
frame.GetSize(out ow, out oh);
if (ow > oh ) {
w = (uint)width;
h = (uint)((double)height * (double)oh / (double)ow);
} else {
w = (uint)((double)height * (double)ow / (double)oh);
h = (uint)height;
}
outputFrame.SetSize(w, h);
// Prepare scaler
var scaler = factory.CreateBitmapScaler();
scaler.Initialize(frame, w, h, WICBitmapInterpolationMode.WICBitmapInterpolationModeFant);
// Write the scaled source to the output frame
outputFrame.WriteSource(scaler, new WICRect {X = 0, Y = 0, Width = (int) width, Height = (int) height});
outputFrame.Commit();
encoder.Commit();
var outputArray = outputStream.ToArray();
outputStream.Close();
Marshal.ReleaseComObject(outputFrame);
Marshal.ReleaseComObject(scaler);
Marshal.ReleaseComObject(propBag);
Marshal.ReleaseComObject(encoder);
return outputArray;
}
public void EncodeToStream(IWICComponentFactory factory, IWICBitmapSource data, IStream outputStream)
{
//A list of COM objects to destroy
List <object> com = new List <object>();
try
{
//Find the GUID of the destination format
Guid guidEncoder = Consts.GUID_ContainerFormatJpeg;
//Find out the data's pixel format
Guid pFormat = Guid.Empty;
data.GetPixelFormat(out pFormat);
//Create the encoder
var encoder = factory.CreateEncoder(guidEncoder, null);
com.Add(encoder);
//And initialize it
encoder.Initialize(outputStream, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
// Create the output frame and property bag
IWICBitmapFrameEncode outputFrame;
var propertyBagArray = new IPropertyBag2[1];
encoder.CreateNewFrame(out outputFrame, propertyBagArray); //An array is used instead of an out parameter... I have no idea why
com.Add(outputFrame);
//The property bag is a COM object...
var propBag = propertyBagArray[0];
com.Add(propBag);
//Adjust encoder settings if it's a jpegs
if (guidEncoder.Equals(Consts.GUID_ContainerFormatJpeg))
{
//Configure encoder settings (see http://msdn.microsoft.com/en-us/library/windows/desktop/ee719871(v=vs.85).aspx#encoderoptions)
var qualityOption = new PROPBAG2[1];
qualityOption[0].pstrName = "ImageQuality";
qualityOption[0].vt = VarEnum.VT_R4;
object qualityValue = ((float)90) / 100;
propBag.Write(1, qualityOption, new object[] { qualityValue });
}
//Apply the property bag
outputFrame.Initialize(propBag);
//Get size
uint fw, fh;
data.GetSize(out fw, out fh);
//Set destination frame size
outputFrame.SetSize(fw, fh);
// Write the data to the output frame
outputFrame.WriteSource(data, null);
outputFrame.Commit();
encoder.Commit();
}
finally
{
//Manually cleanup all the com reference counts, aggressively
while (com.Count > 0)
{
Marshal.ReleaseComObject(com[com.Count - 1]); //In reverse order, so no item is ever deleted out from under another.
com.RemoveAt(com.Count - 1);
}
}
}
public WicEncoder(IStream stm, WicProcessingContext ctx)
{
var frame = (IWICBitmapFrameEncode)null;
if (ctx.Settings.SaveFormat == FileFormat.Jpeg)
{
Encoder = AddRef(Wic.CreateEncoder(Consts.GUID_ContainerFormatJpeg, null));
Encoder.Initialize(stm, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
var bag = (IPropertyBag2)null;
Encoder.CreateNewFrame(out frame, ref bag);
AddRef(frame);
AddRef(bag);
if (ctx.Settings.JpegSubsampleMode != ChromaSubsampleMode.Default)
{
var props = new PROPBAG2[] { new PROPBAG2 {
pstrName = "ImageQuality"
}, new PROPBAG2 {
pstrName = "JpegYCrCbSubsampling"
} };
bag.Write(2, props, new object[] { ctx.Settings.JpegQuality / 100f, (byte)ctx.Settings.JpegSubsampleMode });
}
else
{
var props = new PROPBAG2[] { new PROPBAG2 {
pstrName = "ImageQuality"
} };
bag.Write(1, props, new object[] { ctx.Settings.JpegQuality / 100f });
}
frame.Initialize(bag);
}
else if (ctx.Settings.SaveFormat == FileFormat.Gif)
{
Encoder = AddRef(Wic.CreateEncoder(Consts.GUID_ContainerFormatGif, null));
Encoder.Initialize(stm, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
Encoder.SetPalette(ctx.DestPalette);
Encoder.CreateNewFrame(out frame, null);
AddRef(frame);
frame.Initialize(null);
}
else if (ctx.Settings.SaveFormat == FileFormat.Bmp)
{
Encoder = AddRef(Wic.CreateEncoder(Consts.GUID_ContainerFormatBmp, null));
Encoder.Initialize(stm, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
var bag = (IPropertyBag2)null;
Encoder.CreateNewFrame(out frame, ref bag);
AddRef(frame);
AddRef(bag);
var props = new PROPBAG2[] { new PROPBAG2 {
pstrName = "EnableV5Header32bppBGRA"
} };
bag.Write(1, props, new object[] { ctx.PixelFormat == Consts.GUID_WICPixelFormat32bppBGRA });
frame.Initialize(bag);
}
else if (ctx.Settings.SaveFormat == FileFormat.Tiff)
{
Encoder = AddRef(Wic.CreateEncoder(Consts.GUID_ContainerFormatTiff, null));
Encoder.Initialize(stm, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
var bag = (IPropertyBag2)null;
Encoder.CreateNewFrame(out frame, ref bag);
AddRef(frame);
AddRef(bag);
var props = new PROPBAG2[] { new PROPBAG2 {
pstrName = "TiffCompressionMethod"
} };
bag.Write(1, props, new object[] { (byte)WICTiffCompressionOption.WICTiffCompressionNone });
frame.Initialize(bag);
}
else
{
Encoder = AddRef(Wic.CreateEncoder(Consts.GUID_ContainerFormatPng, null));
Encoder.Initialize(stm, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
Encoder.CreateNewFrame(out frame, null);
AddRef(frame);
frame.Initialize(null);
}
frame.SetResolution(96d, 96d);
frame.SetSize(ctx.Width, ctx.Height);
if (ctx.Settings.IndexedColor && ctx.PixelFormat == Consts.GUID_WICPixelFormat8bppIndexed)
{
frame.SetPalette(ctx.DestPalette);
}
if (ctx.Metadata?.Count > 0)
{
var metawriter = frame.GetMetadataQueryWriterNoThrow();
if (metawriter != null)
{
AddRef(metawriter);
foreach (var nv in ctx.Metadata)
{
metawriter.SetMetadataByNameNoThrow(nv.Key, nv.Value);
}
}
}
// TODO setting
//if (ctx.DestColorContext != null)
// frame.SetColorContexts(1, new IWICColorContext[] { ctx.DestColorContext });
Frame = frame;
}
public void Resize(byte[] sourceBytes, Stream targetStream, uint targetMaxSize)
{
var factory = (IWICComponentFactory) new WICImagingFactory();
var inputStream = factory.CreateStream();
inputStream.InitializeFromMemory(sourceBytes, (uint)sourceBytes.Length);
var decoder = factory.CreateDecoderFromStream(inputStream, null, WICDecodeOptions.WICDecodeMetadataCacheOnLoad);
var frame = decoder.GetFrame(0);
// Compute target size
uint width, height, targetWidth, targetHeight;
frame.GetSize(out width, out height);
if (width <= targetMaxSize && height <= targetMaxSize)
{
targetHeight = height;
targetWidth = width;
}
else if (width > height)
{
targetWidth = targetMaxSize;
targetHeight = height * targetMaxSize / width;
}
else
{
targetWidth = width * targetMaxSize / height;
targetHeight = targetMaxSize;
}
// Prepare output stream to cache file
var outputStreamAdapter = new StreamAdapter(targetStream);
// Prepare JPG encoder
var encoder = factory.CreateEncoder(Consts.GUID_ContainerFormatJpeg, null);
encoder.Initialize(outputStreamAdapter, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
// Prepare output frame
IWICBitmapFrameEncode outputFrame;
var argument = new IPropertyBag2[1];
encoder.CreateNewFrame(out outputFrame, argument);
var propBag = argument[0];
var propertyBagOption = new PROPBAG2[1];
propertyBagOption[0].pstrName = ImageQualityParamName;
propBag.Write(1, propertyBagOption, this.jpegQuality);
outputFrame.Initialize(propBag);
outputFrame.SetResolution(this.thumbDpi, this.thumbDpi);
outputFrame.SetSize(targetWidth, targetHeight);
// Prepare scaler
var scaler = factory.CreateBitmapScaler();
scaler.Initialize(frame, targetWidth, targetHeight, WICBitmapInterpolationMode.WICBitmapInterpolationModeLinear);
// Write the scaled source to the output frame
outputFrame.WriteSource(scaler, new WICRect {
X = 0, Y = 0, Width = (int)targetWidth, Height = (int)targetHeight
});
outputFrame.Commit();
encoder.Commit();
}
public void EncodeToStream(IWICComponentFactory factory, IWICBitmapSource data, Size imageSize, IStream outputStream)
{
//A list of COM objects to destroy
List <object> com = new List <object>();
try {
//Find the GUID of the destination format
Guid guidEncoder = GetOutputFormatWicGuid();
//Find out the data's pixel format
Guid pFormat = Guid.Empty;
data.GetPixelFormat(out pFormat);
//Create the encoder
var encoder = factory.CreateEncoder(guidEncoder, null);
com.Add(encoder);
//And initialize it
encoder.Initialize(outputStream, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
// Create the output frame and property bag
IWICBitmapFrameEncode outputFrame;
var propertyBagArray = new IPropertyBag2[1];
encoder.CreateNewFrame(out outputFrame, propertyBagArray); //An array is used instead of an out parameter... I have no idea why
com.Add(outputFrame);
//The property bag is a COM object...
var propBag = propertyBagArray[0];
com.Add(propBag);
//Adjust encoder settings if it's a jpegs
if (guidEncoder.Equals(Consts.GUID_ContainerFormatJpeg))
{
//Jpeg
//ImageQuality 0..1
//"JpegYCrCbSubsampling" WICJpegYCrCbSubsamplingOption.
//Configure encoder settings (see http://msdn.microsoft.com/en-us/library/windows/desktop/ee719871(v=vs.85).aspx#encoderoptions)
var qualityOption = new PROPBAG2[1];
qualityOption[0].pstrName = "ImageQuality";
propBag.Write(1, qualityOption, new object[] { ((float)Math.Max(0, Math.Min(100, Quality))) / 100 });
WICJpegYCrCbSubsamplingOption subsampling = WICJpegYCrCbSubsamplingOption.WICJpegYCrCbSubsamplingDefault;
//411 NOT SUPPPORTED BY WIC - only by freeimage
if ("420".Equals(Subsampling))
{
subsampling = WICJpegYCrCbSubsamplingOption.WICJpegYCrCbSubsampling420;
}
if ("422".Equals(Subsampling))
{
subsampling = WICJpegYCrCbSubsamplingOption.WICJpegYCrCbSubsampling422;
}
if ("444".Equals(Subsampling))
{
subsampling = WICJpegYCrCbSubsamplingOption.WICJpegYCrCbSubsampling444;
}
if (subsampling != WICJpegYCrCbSubsamplingOption.WICJpegYCrCbSubsamplingDefault)
{
var samplingOption = new PROPBAG2[1];
samplingOption[0].pstrName = "JpegYCrCbSubsampling";
samplingOption[0].vt = VarEnum.VT_UI1;
propBag.Write(1, samplingOption, new object[] { (byte)subsampling });
}
}
//PNG interlace
if (guidEncoder.Equals(Consts.GUID_ContainerFormatPng))
{
var interlaceOption = new PROPBAG2[1];
interlaceOption[0].pstrName = "InterlaceOption";
propBag.Write(1, interlaceOption, new object[] { Interlace ?? false });
}
//Apply the property bag
outputFrame.Initialize(propBag);
//Convert the bitmap to the correct pixel format for encoding.
//Jpeg: encodes as GUID_WICPixelFormat24bppBGR or GUID_WICPixelFormat8bppGray.
//If the original pixel format has an alpha chanel, we need to specify a matte color.
//UPDATE - IWICFormatConverter doesn't let you specify a matte color. Disabling code
if (false && guidEncoder.Equals(Consts.GUID_ContainerFormatJpeg))
{
ConversionUtils.HasAlphaAbility(pFormat);
var conv = factory.CreateFormatConverter();
com.Add(conv);
if (conv.CanConvert(pFormat, Consts.GUID_WICPixelFormat24bppBGR))
{
/*dither, pIPalette, alphaThresholdPercent, and paletteTranslate are used to mitigate color loss when
* converting to a reduced bit-depth format. For conversions that do not need these settings, the
* following parameters values should be used: dither set to WICBitmapDitherTypeNone, pIPalette set to NULL,
* alphaThresholdPercent set to 0.0f, and paletteTranslate set to WICBitmapPaletteTypeCustom.*/
conv.Initialize(data, Consts.GUID_WICPixelFormat24bppBGR, WICBitmapDitherType.WICBitmapDitherTypeNone, null, 0.0f, WICBitmapPaletteType.WICBitmapPaletteTypeCustom);
data = conv;
//Oops, we didn't do anything - there's no way to specify a matte color!
}
}
//GIF encodes as GUID_WICPixelFormat8bppIndexed
//If the current format is > 8bpp, quantization may be required, and we may need to manually build the palette with Median Cut.
//PNG encodeds as EVERYTHING! Way too many formats supported.
// If the user is specifying a colors setting, we need to
// convert to GUID_WICPixelFormat8bppIndexed, GUID_WICPixelFormat4bppIndexed, GUID_WICPixelFormat2bppIndexed, or GUID_WICPixelFormat1bppIndexed
if ((guidEncoder.Equals(Consts.GUID_ContainerFormatPng) && this.Colors != -1) || (guidEncoder.Equals(Consts.GUID_ContainerFormatGif)))
{
Guid target = Consts.GUID_WICPixelFormat8bppIndexed;
int colors = this.Colors;
if (colors > 0 && guidEncoder.Equals(Consts.GUID_ContainerFormatPng))
{
if (colors <= 2)
{
target = Consts.GUID_WICPixelFormat1bppIndexed;
}
if (colors <= 4)
{
target = Consts.GUID_WICPixelFormat2bppIndexed;
}
if (colors <= 32)
{
target = Consts.GUID_WICPixelFormat4bppIndexed;
}
}
if (colors < 0)
{
colors = 256;
}
if (colors < 2)
{
colors = 2;
}
if (colors > 256)
{
colors = 256;
}
var conv = factory.CreateFormatConverter();
com.Add(conv);
if (conv.CanConvert(pFormat, target))
{
var palette = factory.CreatePalette();
com.Add(palette);
palette.InitializeFromBitmap(data, (uint)colors, true);
/*dither, pIPalette, alphaThresholdPercent, and paletteTranslate are used to mitigate color loss when
* converting to a reduced bit-depth format. For conversions that do not need these settings, the
* following parameters values should be used: dither set to WICBitmapDitherTypeNone, pIPalette set to NULL,
* alphaThresholdPercent set to 0.0f, and paletteTranslate set to WICBitmapPaletteTypeCustom.*/
conv.Initialize(data, target, this.Dither ? WICBitmapDitherType.WICBitmapDitherTypeErrorDiffusion : WICBitmapDitherType.WICBitmapDitherTypeNone,
palette, 50.0f, WICBitmapPaletteType.WICBitmapPaletteTypeCustom);
data = conv;
}
}
//Get size
uint fw, fh;
data.GetSize(out fw, out fh);
//Set destination frame size
outputFrame.SetSize(fw, fh);
// Write the data to the output frame
outputFrame.WriteSource(data, null);
outputFrame.Commit();
encoder.Commit();
} finally {
//Manually cleanup all the com reference counts, aggressively
while (com.Count > 0)
{
Marshal.ReleaseComObject(com[com.Count - 1]); //In reverse order, so no item is ever deleted out from under another.
com.RemoveAt(com.Count - 1);
}
}
}
