Quick Reference > Data Types and Structures > JPEG 2000 file format structures > L_JP2_JPXCOMPOSITE

L_JP2_JPXCOMPOSITE

typedef struct _tagL_JP2_JPXCOMPOSITE 
{ 
   L_UINT32 uStructSize; 
   pL_JP2_JPXBITMAPS pBitmaps; 
   L_UINT32 uNumOfBitmaps; 
}L_JP2_JPXCOMPOSITE,   *pL_JP2_JPXCOMPOSITE;

The L_JP2_JPXCOMPOSITE structure provides information for compositing layers contained in a JPEG 2000 file.

Member	Description
uStructSize	Size of this structure, in bytes. Use the sizeof operator to calculate this value.
pBitmaps	Array of compositing layers information.
uNumOfBitmaps	Number of compositing layers. This field specifies the array size.

Comments

A JPEG 2000 file may have multiple compositing layers, each with its own color, opacity, and pre-multiplied opacity channels. If any of a layer's bitmaps is not allocated, the layer has no channel of this type.