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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| -
| Header File
| wingdi.h
| Unicode
| No
| Platform Notes
| None
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BITMAP
The BITMAP structure defines the type, width, height, color format, and bit values of a
bitmap.
typedef struct tagBITMAP { // bm
LONG bmType;
LONG bmWidth;
LONG bmHeight;
LONG bmWidthBytes;
WORD bmPlanes;
WORD bmBitsPixel;
LPVOID bmBits;
} BITMAP;
Members
bmType
Specifies the bitmap type. This member must be zero.
bmWidth
Specifies the width, in pixels, of the bitmap. The width must be greater than
zero.
bmHeight
Specifies the height, in pixels, of the bitmap. The height must be greater
than zero.
bmWidthBytes
Specifies the number of bytes in each scan line. This value must be divisible
by 2, because Windows assumes that the bit values of a bitmap form an array
that is word aligned.
bmPlanes
Specifies the count of color planes.
bmBitsPixel
Specifies the number of bits required to indicate the color of a pixel.
bmBits
Points to the location of the bit values for the bitmap. The bmBits member must be a long pointer to an array of character (1-byte) values.
Remarks
The bitmap formats currently used are monochrome and color. The monochrome
bitmap uses a one-bit, one-plane format. Each scan is a multiple of 32 bits.
Scans are organized as follows for a monochrome bitmap of height n:
Scan 0
Scan 1
.
.
.
Scan n-2
Scan n-1
The pixels on a monochrome device are either black or white. If the
corresponding bit in the bitmap is 1, the pixel is set to the foreground color; if the
corresponding bit in the bitmap is zero, the pixel is set to the background
color.
All devices that have the RC_BITBLT device capability support bitmaps. For
more information, see GetDeviceCaps.
Each device has a unique color format. To transfer a bitmap from one device to
another, use the GetDIBits and SetDIBits functions.
See Also
CreateBitmapIndirect, GetObject
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