The SetDIBitsToDevice function sets the pixels in the specified rectangle on the device that is associated with the destination device context using color data from a device-independent bitmap (DIB).
int SetDIBitsToDevice(
HDC hdc, |
// handle of device context |
int XDest, |
// x-coordinate of upper-left corner of dest. rect. |
int YDest, |
// y-coordinate of upper-left corner of dest. rect. |
DWORD dwWidth, |
// source rectangle width |
DWORD dwHeight, |
// source rectangle height |
int XSrc, |
// x-coordinate of lower-left corner of source rect. |
int YSrc, |
// y-coordinate of lower-left corner of source rect. |
UINT uStartScan, |
// first scan line in array |
UINT cScanLines, |
// number of scan lines |
CONST VOID *lpvBits, |
// address of array with DIB bits |
CONST BITMAPINFO *lpbmi, |
// address of structure with bitmap info. |
UINT fuColorUse |
// RGB or palette indices |
); |
Value |
Meaning |
DIB_PAL_COLORS |
The color table consists of an array of 16-bit indices into the currently selected logical palette. |
DIB_RGB_COLORS |
The color table contains literal RGB values. |
If the function succeeds, the return value is the number of scan lines set.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
Optimal bitmap drawing speed is obtained when the bitmap bits are indices into the system palette.
Applications can retrieve the system palette colors and indices by calling the GetSystemPaletteEntries function. After the colors and indices are retrieved, the application can create the DIB. For more information about the system palette, see Colors.
The origin of a bottom-up DIB is the lower-left corner of the bitmap; the origin of a top-down DIB is the upper-left corner.
To reduce the amount of memory required to set bits from a large device-independent bitmap on a device surface, an application can band the output by repeatedly calling SetDIBitsToDevice, placing a different portion of the bitmap into the lpvBits array each time. The values of the uStartScan and cScanLines parameters identify the portion of the bitmap contained in the lpvBits array.
The SetDIBitsToDevice function returns an error if it is called by a process that is running in the background while a full-screen MS-DOS session runs in the foreground.
BITMAPINFO, GetSystemPaletteEntries, SetDIBits, StretchDIBits
See:
file: /Techref/os/win/api/win32/func/src/f78_5.htm, 7KB, , updated: 2001/6/26 09:53, local time: 2024/12/23 08:47,
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