public static Bitmap FromWic(IWICBitmapSource source) { Guid format; //Get the WIC pixel format source.GetPixelFormat(out format); //Get the matching GDI format PixelFormat gdiFormat = ConversionUtils.GetPixelFormat(format); //If it's not GDI-supported format, convert it to one. IWICComponentFactory factory = null; IWICFormatConverter converter = null; try { if (gdiFormat == PixelFormat.Undefined) { factory = (IWICComponentFactory) new WICImagingFactory(); converter = factory.CreateFormatConverter(); converter.Initialize(source, Consts.GUID_WICPixelFormat32bppBGRA, WICBitmapDitherType.WICBitmapDitherTypeNone, null, 0.9f, WICBitmapPaletteType.WICBitmapPaletteTypeCustom); gdiFormat = PixelFormat.Format32bppArgb; } IWICBitmapSource data = converter != null ? converter : source; //Get the dimensions of the WIC bitmap uint w, h; data.GetSize(out w, out h); Bitmap b = new Bitmap((int)w, (int)h, gdiFormat); BitmapData bd = b.LockBits(new Rectangle(0, 0, (int)w, (int)h), ImageLockMode.WriteOnly, b.PixelFormat); try { long result = CopyPixels(data, IntPtr.Zero, (uint)bd.Stride, (uint)(bd.Stride * bd.Height), bd.Scan0); if (result == 0x80070057) { throw new ArgumentException(); } if (result < 0) { throw new Exception("HRESULT " + result); } return(b); } finally { b.UnlockBits(bd); } } finally { if (converter != null) { Marshal.ReleaseComObject(converter); } if (factory != null) { Marshal.ReleaseComObject(factory); } } }
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); } } }
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); } } }