Package org.lwjgl.stb

Class STBDXT

java.lang.Object

org.lwjgl.stb.STBDXT

public class STBDXT
extends Object

Native bindings to stb_dxt.h from the stb library.

DXT1/DXT5 compressor.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	STB_DXT_DITHER	Use dithering.
static final int	STB_DXT_HIGHQUAL	High quality mode, does two refinement steps instead of 1.
static final int	STB_DXT_NORMAL

Method Summary

Modifier and Type	Method	Description
static void	nstb_compress_bc4_block(long dest, long src_r_one_byte_per_pixel)	Unsafe version of: compress_bc4_block
static void	nstb_compress_bc5_block(long dest, long src_rg_two_byte_per_pixel)	Unsafe version of: compress_bc5_block
static void	nstb_compress_dxt_block(long dest, long src_rgba_four_bytes_per_pixel, int alpha, int mode)	Unsafe version of: compress_dxt_block
static void	stb_compress_bc4_block(ByteBuffer dest, ByteBuffer src_r_one_byte_per_pixel)	Call this function for every block (you must pad).
static void	stb_compress_bc5_block(ByteBuffer dest, ByteBuffer src_rg_two_byte_per_pixel)	Call this function for every block (you must pad).
static void	stb_compress_dxt_block(ByteBuffer dest, ByteBuffer src_rgba_four_bytes_per_pixel, boolean alpha, int mode)	Call this function for every block (you must pad).

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

STB_DXT_NORMAL

public static final int STB_DXT_NORMAL

See Also:

• Constant Field Values

STB_DXT_DITHER

public static final int STB_DXT_DITHER

Use dithering. Was always dubious, now deprecated. Does nothing!

See Also:

• Constant Field Values

STB_DXT_HIGHQUAL

public static final int STB_DXT_HIGHQUAL

High quality mode, does two refinement steps instead of 1. ~30-40% slower.

See Also:

• Constant Field Values

Method Details

nstb_compress_dxt_block

public static void nstb_compress_dxt_block(long dest,
 long src_rgba_four_bytes_per_pixel,
 int alpha,
 int mode)

Unsafe version of: compress_dxt_block

stb_compress_dxt_block

public static void stb_compress_dxt_block(ByteBuffer dest,
 ByteBuffer src_rgba_four_bytes_per_pixel,
 boolean alpha,
 int mode)

Call this function for every block (you must pad).

The source should be a 4x4 block of RGBA data in row-major order. Alpha channel is not stored if you specify alpha=0 (but you must supply some constant alpha in the alpha channel). You can turn on dithering and "high quality" using mode.

Parameters:

dest - a buffer in which to store the compressed block

src_rgba_four_bytes_per_pixel - the block to compress

alpha - 1 to compress the alpha channel, 0 to ignore it

mode - the compression mode. One of:

DXT_NORMAL

DXT_DITHER

DXT_HIGHQUAL

nstb_compress_bc4_block

public static void nstb_compress_bc4_block(long dest,
 long src_r_one_byte_per_pixel)

Unsafe version of: compress_bc4_block

stb_compress_bc4_block

public static void stb_compress_bc4_block(ByteBuffer dest,
 ByteBuffer src_r_one_byte_per_pixel)

Call this function for every block (you must pad). The source should be a 4x4 block of A data in row-major order.

Parameters:

dest - a buffer in which to store the compressed block

src_r_one_byte_per_pixel - the block to compress

nstb_compress_bc5_block

public static void nstb_compress_bc5_block(long dest,
 long src_rg_two_byte_per_pixel)

Unsafe version of: compress_bc5_block

stb_compress_bc5_block

public static void stb_compress_bc5_block(ByteBuffer dest,
 ByteBuffer src_rg_two_byte_per_pixel)

Call this function for every block (you must pad). The source should be a 4x4 block of RG data in row-major order.

Parameters:

dest - a buffer in which to store the compressed block

src_rg_two_byte_per_pixel - the block to compress