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Retrieves a copy of the quantization table.
Syntax
HRESULT GetQuantizationTable(
UINT scanIndex,
UINT tableIndex,
[out] DXGI_JPEG_QUANTIZATION_TABLE *pQuantizationTable
);
Parameters
scanIndex
Type: UINT
The zero-based index of the scan for which data is retrieved.
tableIndex
Type: UINT
The index of the quantization table to retrieve. Valid indices for a given scan can be determined by retrieving the scan header with IWICJpegFrameDecode::GetScanHeader.
[out] pQuantizationTable
Type: DXGI_JPEG_QUANTIZATION_TABLE*
A pointer that receives the table data. This parameter must not be NULL.
Return value
Type: HRESULT
This method can return one of these values.
| Return value | Description |
|---|---|
|
The operation was successful. |
|
The specified scan index is invalid. |
|
Can occur if pTable is NULL or if tableIndex does not point to a valid table slot. Check the scan header for valid table indices. |
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 10 [desktop apps only] |
| Minimum supported server | Windows Server 2016 [desktop apps only] |
| Target Platform | Windows |
| Header | wincodec.h |
| Library | Windowscodecs.lib |
| DLL | Windowscodecs.dll |