IWICDdsFrameDecode::GetSizeInBlocks method (wincodec.h)

Gets the width and height, in blocks, of the DDS image.

Syntax

HRESULT GetSizeInBlocks(
  [out] UINT *pWidthInBlocks,
  [out] UINT *pHeightInBlocks
);

Parameters

[out] pWidthInBlocks

Type: UINT*

The width of the DDS image in blocks.

[out] pHeightInBlocks

Type: UINT*

The height of the DDS image in blocks.

Return value

Type: HRESULT

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Remarks

For block compressed textures, the returned width and height values do not completely define the texture size because the image is padded to fit the closest whole block size. For example, three BC1 textures with pixel dimensions of 1x1, 2x2 and 4x4 will all report pWidthInBlocks = 1 and pHeightInBlocks = 1.

If the texture does not use a block-compressed DXGI_FORMAT, this method returns the texture size in pixels; for these formats the block size returned by IWICDdsFrameDecoder::GetFormatInfo is 1x1.

Requirements

See also

IWICDdsFrameDecode