//-------------------------------------------------------------------------------------
// Decodes an image array, resizing/format converting as needed
//-------------------------------------------------------------------------------------
private static Image DecodeMultiframe(WICFlags flags, ImageDescription metadata, BitmapDecoder decoder)
{
var image = Image.New(metadata);
Guid sourceGuid;
if (!ToWIC(metadata.Format, out sourceGuid))
{
return(null);
}
for (int index = 0; index < metadata.ArraySize; ++index)
{
var pixelBuffer = image.PixelBuffer[index, 0];
using (var frame = decoder.GetFrame(index))
{
var pfGuid = frame.PixelFormat;
var size = frame.Size;
if (pfGuid == sourceGuid)
{
if (size.Width == metadata.Width && size.Height == metadata.Height)
{
// This frame does not need resized or format converted, just copy...
frame.CopyPixels(pixelBuffer.RowStride, pixelBuffer.DataPointer, pixelBuffer.BufferStride);
}
else
{
// This frame needs resizing, but not format converted
using (var scaler = new BitmapScaler(Factory))
{
scaler.Initialize(frame, metadata.Width, metadata.Height, GetWICInterp(flags));
scaler.CopyPixels(pixelBuffer.RowStride, pixelBuffer.DataPointer, pixelBuffer.BufferStride);
}
}
}
else
{
// This frame required format conversion
using (var converter = new FormatConverter(Factory))
{
converter.Initialize(frame, pfGuid, GetWICDither(flags), null, 0, BitmapPaletteType.Custom);
if (size.Width == metadata.Width && size.Height == metadata.Height)
{
converter.CopyPixels(pixelBuffer.RowStride, pixelBuffer.DataPointer, pixelBuffer.BufferStride);
}
else
{
// This frame needs resizing, but not format converted
using (var scaler = new BitmapScaler(Factory))
{
scaler.Initialize(frame, metadata.Width, metadata.Height, GetWICInterp(flags));
scaler.CopyPixels(pixelBuffer.RowStride, pixelBuffer.DataPointer, pixelBuffer.BufferStride);
}
}
}
}
}
}
return(image);
}
public bool GetThumbnail(Stream stream, int width, int height, bool cachedOnly, out byte[] imageData, out ImageType imageType)
{
imageData = null;
imageType = ImageType.Unknown;
// No support for cache
if (cachedOnly)
{
return(false);
}
try
{
if (stream.CanSeek)
{
stream.Seek(0, SeekOrigin.Begin);
}
// open the image file for reading
using (var factory = new ImagingFactory2())
using (var inputStream = new WICStream(factory, stream))
using (var decoder = new BitmapDecoder(factory, inputStream, DecodeOptions.CacheOnLoad))
using (var scaler = new BitmapScaler(factory))
using (var output = new MemoryStream())
using (var encoder = new BitmapEncoder(factory, ContainerFormatGuids.Jpeg))
{
// decode the loaded image to a format that can be consumed by D2D
BitmapSource source = decoder.GetFrame(0);
// Scale down larger images
int sourceWidth = source.Size.Width;
int sourceHeight = source.Size.Height;
if (width > 0 && height > 0 && (sourceWidth > width || sourceHeight > height))
{
if (sourceWidth <= height)
{
width = sourceWidth;
}
int newHeight = sourceHeight * height / sourceWidth;
if (newHeight > height)
{
// Resize with height instead
width = sourceWidth * height / sourceHeight;
newHeight = height;
}
scaler.Initialize(source, width, newHeight, BitmapInterpolationMode.Fant);
source = scaler;
}
encoder.Initialize(output);
using (var bitmapFrameEncode = new BitmapFrameEncode(encoder))
{
// Create image encoder
var wicPixelFormat = PixelFormat.FormatDontCare;
bitmapFrameEncode.Initialize();
bitmapFrameEncode.SetSize(source.Size.Width, source.Size.Height);
bitmapFrameEncode.SetPixelFormat(ref wicPixelFormat);
bitmapFrameEncode.WriteSource(source);
bitmapFrameEncode.Commit();
encoder.Commit();
}
imageData = output.ToArray();
imageType = ImageType.Jpeg;
return(true);
}
}
catch (Exception e)
{
// ServiceRegistration.Get<ILogger>().Warn("WICThumbnailProvider: Error loading bitmapSource from file data stream", e);
return(false);
}
}
/// <summary>
/// 從WIC Frame建立貼圖資源(非DDS)
/// </summary>
/// <param name="d3dContext">If a Direct3D 11 device context is provided and the current device supports it for the given pixel format, it will auto-generate mipmaps.</param>
private static Result CreateWICTexture(Device device, DeviceContext d3dContext, BitmapFrameDecode frame, int maxsize, ResourceUsage usage, BindFlags bind, CpuAccessFlags cpuAccess, ResourceOptionFlags option, LoadFlags load, out Resource texture, out ShaderResourceView textureView)
{
texture = null;
textureView = null;
if (frame.Size.Width <= 0 || frame.Size.Height <= 0)
{
return(Result.InvalidArg);
}
if (maxsize == 0)
{
switch (device.FeatureLevel)
{
case FeatureLevel.Level_9_1:
case FeatureLevel.Level_9_2:
maxsize = 2048 /*D3D_FL9_1_REQ_TEXTURE2D_U_OR_V_DIMENSION*/;
break;
case FeatureLevel.Level_9_3:
maxsize = 4096 /*D3D_FL9_3_REQ_TEXTURE2D_U_OR_V_DIMENSION*/;
break;
case FeatureLevel.Level_10_0:
case FeatureLevel.Level_10_1:
maxsize = 8192 /*D3D10_REQ_TEXTURE2D_U_OR_V_DIMENSION*/;
break;
default:
maxsize = Resource.MaximumTexture2DSize; /*D3D11_REQ_TEXTURE2D_U_OR_V_DIMENSION*/
break;
}
}
Size2 frameSize = frame.Size;
Size2 targetSize;
if (frameSize.Width > maxsize || frameSize.Height > maxsize)
{
double ratio = Convert.ToDouble(frameSize.Height) / Convert.ToDouble(frameSize.Width);
if (frameSize.Width > frameSize.Height)
{
targetSize.Width = maxsize;
targetSize.Height = Math.Max(1, Convert.ToInt32(maxsize * ratio));
}
else
{
targetSize.Height = maxsize;
targetSize.Width = Math.Max(1, Convert.ToInt32(maxsize / ratio));
}
}
else
{
targetSize = frameSize;
}
#region Determine format
Guid sourceFormat = frame.PixelFormat;
Guid targetFormat = sourceFormat;
DXGI.Format format = sourceFormat.ConvertWICToDXGIFormat();
int bpp = 0;
if (format == DXGI.Format.Unknown)
{
if (sourceFormat == PixelFormat.Format96bppRGBFixedPoint)
{
if (WIC2)
{
targetFormat = PixelFormat.Format96bppRGBFloat;
format = DXGI.Format.R32G32B32_Float;
bpp = 96;
}
else
{
targetFormat = PixelFormat.Format128bppRGBAFloat;
format = DXGI.Format.R32G32B32A32_Float;
bpp = 128;
}
}
else
{
targetFormat = sourceFormat.ConvertToNearest();
format = targetFormat.ConvertWICToDXGIFormat();
bpp = PixelFormat.GetBitsPerPixel(targetFormat);
}
if (format == DXGI.Format.Unknown)
{
return(Result.GetResultFromWin32Error(unchecked ((int)0x80070032)));
}
}
else
{
bpp = PixelFormat.GetBitsPerPixel(sourceFormat);
}
if (format == DXGI.Format.R32G32B32_Float && d3dContext != null)
{
// Special case test for optional device support for autogen mipchains for R32G32B32_FLOAT
var formatSupport = device.CheckFormatSupport(format);
if (!formatSupport.HasFlag(FormatSupport.MipAutogen))
{
targetFormat = PixelFormat.Format128bppRGBAFloat;
format = DXGI.Format.R32G32B32A32_Float;
bpp = 128;
}
}
if (bpp == 0)
{
return(Result.Fail);
}
if (load.HasFlag(LoadFlags.ForceSrgb))
{
format = format.MakeSRgb();
}
else if (!load.HasFlag(LoadFlags.ignoreSrgb))
{
bool sRGB = false;
try {
var metareader = frame.MetadataQueryReader;
var containerFormat = metareader.ContainerFormat;
if (containerFormat == ContainerFormatGuids.Png)
{
// Check for sRGB chunk
if (metareader.TryGetMetadataByName("/sRGB/RenderingIntent", out var value) == Result.Ok)
{
sRGB = true;
}
}
else if (metareader.TryGetMetadataByName("System.Image.ColorSpace", out var value) == Result.Ok)
{
sRGB = true;
}
if (sRGB)
{
format = format.MakeSRgb();
}
} catch (SharpDXException) {
// BMP, ICO are not supported.
}
}
// Verify our target format is supported by the current device
var support = device.CheckFormatSupport(format);
if (!support.HasFlag(FormatSupport.Texture2D))
{
targetFormat = PixelFormat.Format32bppRGBA;
format = DXGI.Format.R8G8B8A8_UNorm;
bpp = 32;
}
#endregion
int stride = (targetSize.Width * bpp + 7) / 8; // round
int imageSize = stride * targetSize.Height;
IntPtr temp = System.Runtime.InteropServices.Marshal.AllocCoTaskMem(imageSize);
if (sourceFormat == targetFormat && frameSize == targetSize) // 不需要格式轉換 且 不需要改變大小
{
frame.CopyPixels(stride, new DataPointer(temp, imageSize));
}
else if (frameSize == targetSize) // 需要格式轉換
{
using (var factory = new ImagingFactory2())
using (var coverter = new FormatConverter(factory)) {
if (coverter.CanConvert(sourceFormat, targetFormat))
{
coverter.Initialize(frame, targetFormat, BitmapDitherType.ErrorDiffusion, null, 0, BitmapPaletteType.MedianCut);
coverter.CopyPixels(stride, new DataPointer(temp, imageSize));
}
else
{
return(Result.UnexpectedFailure);
}
}
}
else if (sourceFormat == targetFormat) // 需要改變大小
{
using (var factory = new ImagingFactory2())
using (var scaler = new BitmapScaler(factory)) {
scaler.Initialize(frame, targetSize.Width, targetSize.Height, BitmapInterpolationMode.Fant);
var pfScaler = scaler.PixelFormat;
if (targetFormat == pfScaler)
{
scaler.CopyPixels(stride, new DataPointer(temp, imageSize));
}
}
}
else // 需要格式轉換 且 需要改變大小
{
using (var factory = new ImagingFactory2())
using (var scaler = new BitmapScaler(factory))
using (var coverter = new FormatConverter(factory)) {
scaler.Initialize(frame, targetSize.Width, targetSize.Height, BitmapInterpolationMode.Fant);
var pfScaler = scaler.PixelFormat;
if (coverter.CanConvert(pfScaler, targetFormat))
{
coverter.Initialize(scaler, targetFormat, BitmapDitherType.ErrorDiffusion, null, 0, BitmapPaletteType.MedianCut);
coverter.CopyPixels(stride, new DataPointer(temp, imageSize));
}
else
{
return(Result.UnexpectedFailure);
}
}
}
var autogen = false;
if (d3dContext != null)
{
var formatSupport = device.CheckFormatSupport(format);
if (formatSupport.HasFlag(FormatSupport.MipAutogen))
{
autogen = true;
}
}
var texture2DDescription = new Texture2DDescription()
{
Width = targetSize.Width,
Height = targetSize.Height,
MipLevels = autogen ? 0 : 1,
ArraySize = 1,
Format = format,
SampleDescription = new DXGI.SampleDescription(1, 0),
Usage = usage,
CpuAccessFlags = cpuAccess,
};
if (autogen)
{
texture2DDescription.BindFlags = bind | BindFlags.RenderTarget;
texture2DDescription.OptionFlags = option | ResourceOptionFlags.GenerateMipMaps;
}
else
{
texture2DDescription.BindFlags = bind;
texture2DDescription.OptionFlags = option;
}
Result result = Result.Ok;
// 建立Texture2D !!!
try {
if (autogen)
{
texture = new Texture2D(device, texture2DDescription);
}
else
{
texture = new Texture2D(device, texture2DDescription, new DataBox[] { new DataBox(temp, stride, imageSize) });
}
} catch (SharpDXException e) {
System.Diagnostics.Debug.WriteLine(e.ToString());
result = Result.Fail;
}
if (result.Success)
{
var SRVDesc = new ShaderResourceViewDescription()
{
Format = format,
Dimension = ShaderResourceViewDimension.Texture2D,
Texture2D = new ShaderResourceViewDescription.Texture2DResource()
{
MipLevels = autogen ? -1 : 1
},
};
try {
textureView = new ShaderResourceView(device, texture, SRVDesc);
if (autogen)
{
DataBox data = new DataBox(temp, stride, imageSize);
d3dContext.UpdateSubresource(data, texture);
d3dContext.GenerateMips(textureView);
}
} catch (Exception e) {
System.Diagnostics.Debug.WriteLine(e.ToString());
Utilities.Dispose(ref texture);
result = Result.Fail;
}
}
// 釋放 Unmanaged 資源
System.Runtime.InteropServices.Marshal.FreeCoTaskMem(temp);
return(result);
}
/// <summary>
/// Function to read multiple frames from a decoder that supports multiple frames.
/// </summary>
/// <param name="wic">WIC interface.</param>
/// <param name="data">Image data to populate.</param>
/// <param name="decoder">Decoder for the image.</param>
private void ReadFrames(GorgonWICImage wic, GorgonImageData data, BitmapDecoder decoder)
{
Guid bestPixelFormat = wic.GetGUID(data.Settings.Format);
// Find the best fit pixel format.
if (bestPixelFormat == Guid.Empty)
{
throw new IOException(string.Format(Resources.GORGFX_FORMAT_NOT_SUPPORTED, data.Settings.Format));
}
// Use the image array as the frames.
int arrayCount = _actualArrayCount.Min(data.Settings.ArrayCount);
for (int array = 0; array < arrayCount; array++)
{
var buffer = data.Buffers[0, array];
// Get the frame data.
using (var frame = decoder.GetFrame(array))
{
IntPtr bufferPointer = buffer.Data.BasePointer;
Guid frameFormat = frame.PixelFormat;
int frameWidth = frame.Size.Width;
int frameHeight = frame.Size.Height;
var frameOffset = GetFrameOffset(frame);
// Calculate the pointer offset if we have an offset from the frame. Only offset if we're clipping the image though.
if (((frameOffset.Y != 0) || (frameOffset.X != 0)) && (Clip))
{
bufferPointer = buffer.Data.BasePointer + (frameOffset.Y * buffer.PitchInformation.RowPitch) + (frameOffset.X * (buffer.PitchInformation.RowPitch / buffer.Width));
}
// Confirm that we actually need to perform clipping.
bool needsSizeAdjust = (frameWidth + frameOffset.X > data.Settings.Width) || (frameHeight + frameOffset.Y > data.Settings.Height);
// If the formats match, then we don't need to do conversion.
if (bestPixelFormat == frameFormat)
{
// If the width and height are the same then we can just do a straight copy into the buffer.
if (((frameWidth == data.Settings.Width) && (frameHeight == data.Settings.Height)) || ((!needsSizeAdjust) && (Clip)))
{
frame.CopyPixels(buffer.PitchInformation.RowPitch, bufferPointer, buffer.PitchInformation.SlicePitch);
continue;
}
// We need to scale the image up/down to the size of our image data.
if (!Clip)
{
using (var scaler = new BitmapScaler(wic.Factory))
{
scaler.Initialize(frame, data.Settings.Width, data.Settings.Height, (BitmapInterpolationMode)Filter);
scaler.CopyPixels(buffer.PitchInformation.RowPitch, bufferPointer, buffer.PitchInformation.SlicePitch);
}
continue;
}
using (var clipper = new BitmapClipper(wic.Factory))
{
clipper.Initialize(frame, new Rectangle(0, 0, data.Settings.Width, data.Settings.Height));
clipper.CopyPixels(buffer.PitchInformation.RowPitch, bufferPointer, buffer.PitchInformation.SlicePitch);
}
continue;
}
// Poop. We need to convert this image.
using (var converter = new FormatConverter(wic.Factory))
{
converter.Initialize(frame,
bestPixelFormat,
(BitmapDitherType)Dithering,
null,
0.0,
BitmapPaletteType.Custom);
if (((frameWidth == data.Settings.Width) && (frameHeight == data.Settings.Height)) ||
((!needsSizeAdjust) && (Clip)))
{
converter.CopyPixels(buffer.PitchInformation.RowPitch,
bufferPointer,
buffer.PitchInformation.SlicePitch);
continue;
}
// And we need to scale the image.
if (!Clip)
{
using (var scaler = new BitmapScaler(wic.Factory))
{
scaler.Initialize(converter,
data.Settings.Width,
data.Settings.Height,
(BitmapInterpolationMode)Filter);
scaler.CopyPixels(buffer.PitchInformation.RowPitch,
bufferPointer,
buffer.PitchInformation.SlicePitch);
}
continue;
}
using (var clipper = new BitmapClipper(wic.Factory))
{
clipper.Initialize(frame,
new Rectangle(0, 0, data.Settings.Width, data.Settings.Height));
clipper.CopyPixels(buffer.PitchInformation.RowPitch,
bufferPointer,
buffer.PitchInformation.SlicePitch);
}
}
}
}
}
public bool GetThumbnail(Stream stream, int width, int height, bool cachedOnly, out byte[] imageData, out ImageType imageType)
{
imageData = null;
imageType = ImageType.Unknown;
// No support for cache
if (cachedOnly)
{
return(false);
}
Bitmap cachedBitmap = null; // used only for rotation
try
{
if (stream.CanSeek)
{
stream.Seek(0, SeekOrigin.Begin);
}
// open the image file for reading
using (var factory = new ImagingFactory2())
using (var inputStream = new WICStream(factory, stream))
using (var decoder = new BitmapDecoder(factory, inputStream, DecodeOptions.CacheOnLoad))
using (var rotator = new BitmapFlipRotator(factory))
using (var scaler = new BitmapScaler(factory))
using (var output = new MemoryStream())
{
// decode the loaded image to a format that can be consumed by D2D
BitmapSource source = decoder.GetFrame(0);
// Prefer PNG output for source PNG and for source formats with Alpha channel
var usePngOutput = decoder.DecoderInfo.FriendlyName.StartsWith("PNG") || PixelFormat.GetBitsPerPixel(source.PixelFormat) == 32;
BitmapTransformOptions bitmapTransformationOptions = BitmapTransformOptions.Rotate0;
BitmapFrameDecode frame = source as BitmapFrameDecode;
if (frame != null)
{
const string EXIF_ORIENTATION_TAG = "/app1/{ushort=0}/{ushort=274}";
ushort? orientation = null;
try
{
// Not supported on all input types, i.e. BMP will fail here
orientation = (ushort?)frame.MetadataQueryReader.TryGetMetadataByName(EXIF_ORIENTATION_TAG); //0x0112
}
catch { }
// If the EXIF orientation specifies that the image needs to be flipped or rotated before display, set that up to happen
if (orientation.HasValue)
{
switch (orientation.Value)
{
case 1: break; // No rotation required.
case 2: bitmapTransformationOptions = BitmapTransformOptions.Rotate0 | BitmapTransformOptions.FlipHorizontal; break;
case 3: bitmapTransformationOptions = BitmapTransformOptions.Rotate180; break;
case 4: bitmapTransformationOptions = BitmapTransformOptions.Rotate180 | BitmapTransformOptions.FlipHorizontal; break;
case 5: bitmapTransformationOptions = BitmapTransformOptions.Rotate270 | BitmapTransformOptions.FlipHorizontal; break;
case 6: bitmapTransformationOptions = BitmapTransformOptions.Rotate90; break;
case 7: bitmapTransformationOptions = BitmapTransformOptions.Rotate90 | BitmapTransformOptions.FlipHorizontal; break;
case 8: bitmapTransformationOptions = BitmapTransformOptions.Rotate270; break;
}
}
}
// Scale down larger images
int sourceWidth = source.Size.Width;
int sourceHeight = source.Size.Height;
if (width > 0 && height > 0 && (sourceWidth > width || sourceHeight > height))
{
if (sourceWidth <= height)
{
width = sourceWidth;
}
int newHeight = sourceHeight * height / sourceWidth;
if (newHeight > height)
{
// Resize with height instead
width = sourceWidth * height / sourceHeight;
newHeight = height;
}
scaler.Initialize(source, width, newHeight, BitmapInterpolationMode.Fant);
source = scaler;
}
// Rotate
if (bitmapTransformationOptions != BitmapTransformOptions.Rotate0)
{
// For fast rotation a cached bitmap is needed, otherwise only per-pixel-decoding happens which makes the process extremly slow.
// See https://social.msdn.microsoft.com/Forums/windowsdesktop/en-US/5ff2b52b-602f-4b22-9fb2-371539ff5ebb/hang-in-createbitmapfromwicbitmap-when-using-iwicbitmapfliprotator?forum=windowswic
cachedBitmap = new Bitmap(factory, source, BitmapCreateCacheOption.CacheOnLoad);
rotator.Initialize(cachedBitmap, bitmapTransformationOptions);
source = rotator;
}
Guid formatGuid = ContainerFormatGuids.Jpeg;
imageType = ImageType.Jpeg;
if (usePngOutput)
{
formatGuid = ContainerFormatGuids.Png;
imageType = ImageType.Png;
}
using (var encoder = new BitmapEncoder(factory, formatGuid))
{
encoder.Initialize(output);
using (var bitmapFrameEncode = new BitmapFrameEncode(encoder))
{
// Create image encoder
var wicPixelFormat = PixelFormat.FormatDontCare;
bitmapFrameEncode.Initialize();
bitmapFrameEncode.SetSize(source.Size.Width, source.Size.Height);
bitmapFrameEncode.SetPixelFormat(ref wicPixelFormat);
bitmapFrameEncode.WriteSource(source);
bitmapFrameEncode.Commit();
encoder.Commit();
}
}
imageData = output.ToArray();
return(true);
}
}
catch (Exception)
{
//ServiceRegistration.Get<ILogger>().Warn("WICThumbnailProvider: Error loading bitmapSource from file data stream", ex);
return(false);
}
finally
{
cachedBitmap?.Dispose();
}
}