CreateDIBitmap
The CreateDIBitmap
function creates a device-dependent bitmap (DDB) from a device-independent
bitmap (DIB) and, optionally, sets the bitmap bits.
HBITMAP CreateDIBitmap(
|
HDC hdc, |
// handle to device
context |
|
CONST BITMAPINFOHEADER *lpbmih, |
// pointer to
bitmap size and format data |
|
DWORD fdwInit, |
// initialization
flag |
|
CONST VOID *lpbInit, |
// pointer to
initialization data |
|
CONST BITMAPINFO *lpbmi, |
// pointer to bitmap
color-format data |
|
UINT fuUsage |
// color-data usage
|
|
); |
|
Parameters
hdc
Identifies a
device context.
lpbmih
Points to a BITMAPINFOHEADER structure.
If fdwInit is CBM_INIT, the function uses the BITMAPINFOHEADER
structure to obtain the desired width and height of the bitmap as well as other
information. Note that a positive value for the height indicates a bottom-up
DIB while a negative value for the height indicates a top-down DIB. This
scenario is compatible with the CreateDIBitmap function.
fdwInit
A set of bit
flags that specify how the operating system initializes the bitmap s bits.
The following bit flag constant is defined:
|
Value |
Meaning |
|
CBM_INIT |
If this
flag is set, the operating system uses the data pointed to by the lpbInit
and lpbmi parameters to initialize the bitmap s bits. If this
flag is clear, the data pointed to by those parameters is not used. |
If fdwInit is zero, the operating system does not initialize the
bitmap s bits.
lpbInit
Points to an
array of bytes containing the initial bitmap data. The format of the data depends
on the biBitCount member of the BITMAPINFO structure to which the lpbmi
parameter points.
lpbmi
Points to a BITMAPINFO
structure that describes the dimensions and color format of the array pointed
to by the lpbInit parameter.
fuUsage
Specifies
whether the bmiColors member of the BITMAPINFO structure was
initialized and, if so, whether bmiColors contains explicit red, green,
blue (RGB) values or palette indices. The fuUsage parameter must be one
of the following values:
|
Value |
Meaning |
|
DIB_PAL_COLORS |
A color
table is provided and consists of an array of 16-bit indices into the logical
palette of the device context into which the bitmap is to be selected. |
|
DIB_RGB_COLORS |
A color
table is provided and contains literal RGB values. |
Return Values
If the
function succeeds, the return value is a handle to the bitmap.
If the
function fails, the return value is NULL.
Remarks
The
CBM_CREATDIB flag for the fdwInit parameter is no longer supported.
When you no
longer need the bitmap, call the DeleteObject function to delete it.
See Also