IWICJpegFrameEncode::WriteScan method (wincodec.h)

Writes scan data to a JPEG frame.

Syntax

HRESULT WriteScan(
  UINT       cbScanData,
  const BYTE *pbScanData
);

Parameters

cbScanData

Type: UINT

The size of the data in the pbScanData parameter.

pbScanData

Type: BYTE*

The scan data to write.

Return value

Type: HRESULT

Returns S_OK on successful completion.

Remarks

WriteScan may be called multiple times. Each call appends the scan data specified to any previous scan data. Complete the scan by calling IWICBitmapFrameEncode::Commit.

Any calls to set encoder parameters or image metadata that will appear before the scan data in the resulting JPEG file must be completed before the first call to this method. This includes calls to IWICBitmapFrameEncode::SetColorContexts , IWICBitmapFrameEncode::SetPalette, IWICBitmapFrameEncode::SetPixelFormat, IWICBitmapFrameEncode::SetResolution, and IWICBitmapFrameEncode::SetThumbnail. IWICBitmapFrameEncode::SetSize is required as it has no default value for encoded image size.

Requirements

See also

IWICBitmapFrameEncode

IWICJpegFrameEncode