BITMAPINFO2

Bit-map information structure.

Each bit plane logically contains (cx * cy * cBitCount) bits, although the actual length can be greater because of padding.

Note

Many functions can accept either this structure or the BITMAPINFO structure. Where possible, BITMAPINFO2 should be used.

The cbFix field is used to find the color table, if any, that goes with the information in this structure. A color table is an array of color (RGB2) values. If there are N bits per pel (N = cPlanes * cBitCount), the array contains 2**N color values. However, if N = 24, the color table is not required (because the standard-format bit map, with 24 bits per pel, is assumed to contain RGB values), unless either cclrUsed or cclrImportant is non-zero.

Type

typedef struct _BITMAPINFO2 {
 ULONG   cbFix;           /* Length of fixed portion of structure. */
 ULONG   cx;              /* Bit-map width in pels. */
 ULONG   cy;              /* Bit-map height in pels. */
 USHORT  cPlanes;         /* Number of bit planes. */
 USHORT  cBitCount;       /* Number of bits per pel within a plane. */
 ULONG   ulCompression;   /* Compression scheme used to store the bit map. */
 ULONG   cbImage;         /* Length of bit-map storage data, in bytes. */
 ULONG   cxResolution;    /* Horizontal component of the resolution of target device. */
 ULONG   cyResolution;    /* Vertical component of the resolution of the target device. */
 ULONG   cclrUsed;        /* Number of color indexes used. */
 ULONG   cclrImportant;   /* Minimum number of color indexes for satisfactory appearance of the bit map. */
 USHORT  usUnits;         /* Units of measure. */
 USHORT  usReserved;      /* Reserved. */
 USHORT  usRecording;     /* Recording algorithm. */
 USHORT  usRendering;     /* Halftoning algorithm. */
 ULONG   cSize1;          /* Size value 1. */
 ULONG   cSize2;          /* Size value 2. */
 ULONG   ulColorEncoding; /* Color encoding. */
 ULONG   ulIdentifier;    /* Reserved for application use. */
 RGB2    argbColor[1];    /* Array of RGB values. */
} BITMAPINFO2;

C Declaration Method

typedef BITMAPINFO2 *PBITMAPINFO2;