In This Topic ▼

L_JP2_JPXBITMAPS

Summary

The L_JP2_JPXBITMAPS structure provides information about layer channels.

Syntax

typedef struct _tagL_JP2_JPXBITMAPS 
{ 
   L_UINT32 uStructSize; 
   BITMAPHANDLE ColorBitmap; 
   eJP2CODESTREAMFORMAT eColorFormat; 
   BITMAPHANDLE OpacityBitmap; 
   eJP2CODESTREAMFORMAT eOpacityFormat; 
   BITMAPHANDLE PreOpacityBitmap; 
   eJP2CODESTREAMFORMAT ePreOpacityFormat; 
} L_JP2_JPXBITMAPS,   *pL_JP2_JPXBITMAPS;

Members

uStructSize

Size of this structure, in bytes. Use the sizeof operator to calculate this value.

ColorBitmap

Color channels. This image specifies a layer color channels codestream.

eColorFormat

This field specifies the compression type of a color channels codestream. This value is used only when saving a layer (i.e. L_Jp2SaveComposite and L_Jp2SaveCompositeMemory functions) otherwise it is ignored.

OpacityBitmap

Opacity channels. This image specifies a layer opacity channels codestream.

eOpacityFormat

This field specifies the compression type of an opacity channels codestream. This value is used only when saving a layer (i.e. L_Jp2SaveComposite and L_Jp2SaveCompositeMemory functions) otherwise it is ignored.

PreOpacityBitmap

Pre-Multiplied Opacity channels. This image specifies a layer pre-multiplied opacity channels codestream.

ePreOpacityFormat

This field specifies the compression type of a pre-multiplied opacity channels codestream. This value is used only when saving a layer (i.e. L_Jp2SaveComposite and L_Jp2SaveCompositeMemory functions) otherwise it is ignored.

Comments

The L_JP2_JPXBITMAPS structure specifies the layer color, opacity, pre-multiplied opacity, and compression information. If any of these bitmaps is not allocated that means the layer has no channel of this type.