CS::Graphics::UncompressedDXTDataLayout Struct Reference

Description on how pixel data before compression resp. More...

#include <igraphic/dxtcompress.h>

Public Member Functions
void	Fix (size_t uncompressedSize)
	Set members with value 0 to default values based on the given size of the uncompressed data type.
Public Attributes
size_t	blocksPerRow
	Number of blocks per row.
size_t	bytesToNextBlock
	Distance (in bytes) to the next block of pixels, from the beginning of the last block.
size_t	bytesToNextPixel
	Distance (in bytes) to the next pixel in a row.
size_t	bytesToNextRow
	Distance (in bytes) to the next row of pixels, from the beginning of the last row.

Detailed Description

Description on how pixel data before compression resp.

after decompression is arranged in blocks. DXT (and related) compression methods work on 4x4 blocks. This structure contains the necessary information to locate the individual pixels in a block as well as the next block to work on.

Definition at line 45 of file dxtcompress.h.

Member Function Documentation

void CS::Graphics::UncompressedDXTDataLayout::Fix ( size_t uncompressedSize ) [inline]

Set members with value 0 to default values based on the given size of the uncompressed data type.

Definition at line 80 of file dxtcompress.h.

Member Data Documentation

size_t CS::Graphics::UncompressedDXTDataLayout::blocksPerRow

Number of blocks per row.

After that number of blocks was decompressed the output pointer is advanced to the next row of destination blocks, which is computed from the start of the last row of destination blocks plus four times bytesToNextRow.

Definition at line 71 of file dxtcompress.h.

size_t CS::Graphics::UncompressedDXTDataLayout::bytesToNextBlock

Distance (in bytes) to the next block of pixels, from the beginning of the last block.

If 0, the effective block distance is 4 times the effective pixel distance.

Definition at line 64 of file dxtcompress.h.

size_t CS::Graphics::UncompressedDXTDataLayout::bytesToNextPixel

Distance (in bytes) to the next pixel in a row.

If 0, the effective pixel distance is the size of the uncompressed input/output data type (which depends on the context).

Definition at line 52 of file dxtcompress.h.

size_t CS::Graphics::UncompressedDXTDataLayout::bytesToNextRow

Distance (in bytes) to the next row of pixels, from the beginning of the last row.

If 0, the effective row distance is 4 times the effective pixel distance.