Class ARBCompressedTexturePixelStorage
This extension expands the functionality of the PixelStorei
modes to allow UNPACK_ROW_LENGTH
, UNPACK_SKIP_ROWS
,
UNPACK_SKIP_PIXELS
, UNPACK_IMAGE_HEIGHT
and UNPACK_SKIP_IMAGES
to affect the operation of CompressedTexImage*D and
CompressedTexSubImage*D. Similarly, it also allows PACK_ROW_LENGTH
, PACK_SKIP_ROWS
, PACK_SKIP_PIXELS
, PACK_IMAGE_HEIGHT
and
PACK_SKIP_IMAGES
to affect the operation of GetCompressedTexImage*D. This allows data to be transferred to or from a specified sub-rectangle of a
larger compressed image.
This extension is designed primarily to support compressed image formats with fixed-size blocks. To use this new mechanism, an application should program new parameters UNPACK_COMPRESSED_BLOCK_{WIDTH,HEIGHT,DEPTH,SIZE} to indicate the number of texels in each dimension of the fixed-size block as well as the number of bytes consumed by each block. These parameters, in addition to the existing PixelStore parameters, are used to identify a collection of bytes in client memory or a buffer object's data store to use as compressed texture data. This operation is unlikely to have the desired results if the client programs a block size inconsistent with the underlying compressed image format, or if the compressed image format has variable-sized blocks.
Requires OpenGL 2.1
. Promoted to core in OpenGL 4.2
.
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Field Summary
Modifier and TypeFieldDescriptionstatic final int
Accepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.static final int
Accepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.static final int
Accepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.static final int
Accepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.static final int
Accepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.static final int
Accepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.static final int
Accepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.static final int
Accepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev. -
Method Summary
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Field Details
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GL_UNPACK_COMPRESSED_BLOCK_WIDTH
public static final int GL_UNPACK_COMPRESSED_BLOCK_WIDTHAccepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.- See Also:
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GL_UNPACK_COMPRESSED_BLOCK_HEIGHT
public static final int GL_UNPACK_COMPRESSED_BLOCK_HEIGHTAccepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.- See Also:
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GL_UNPACK_COMPRESSED_BLOCK_DEPTH
public static final int GL_UNPACK_COMPRESSED_BLOCK_DEPTHAccepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.- See Also:
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GL_UNPACK_COMPRESSED_BLOCK_SIZE
public static final int GL_UNPACK_COMPRESSED_BLOCK_SIZEAccepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.- See Also:
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GL_PACK_COMPRESSED_BLOCK_WIDTH
public static final int GL_PACK_COMPRESSED_BLOCK_WIDTHAccepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.- See Also:
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GL_PACK_COMPRESSED_BLOCK_HEIGHT
public static final int GL_PACK_COMPRESSED_BLOCK_HEIGHTAccepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.- See Also:
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GL_PACK_COMPRESSED_BLOCK_DEPTH
public static final int GL_PACK_COMPRESSED_BLOCK_DEPTHAccepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.- See Also:
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GL_PACK_COMPRESSED_BLOCK_SIZE
public static final int GL_PACK_COMPRESSED_BLOCK_SIZEAccepted by thepname
parameter of PixelStore[fi], GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev.- See Also:
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