LBitmapSettings::DefaultDithering
#include "ltwrappr.h"
static L_INT LBitmapSettings::DefaultDithering(uMethod)
L_UINT uMethod; |
/* the dithering method to use */ |
Specifies the default dithering method to use when converting an image from 64, 48, 32, 24, or 16 bits per pixel to 8 bits per pixel or fewer.
Parameter |
Description |
|
uMethod |
The dithering method to use. Possible values are: |
|
|
Value |
Meaning |
|
NO_DITHERING |
[0] Use no dithering. |
|
FLOYD_STEIN_DITHERING |
[1] Use the Floyd-Steinberg method. |
|
BURKES_DITHERING |
[3] Use the Burkes method. |
|
STUCKI_DITHERING |
[2] Use the Stucki method. |
|
SIERRA_DITHERING |
[4] Use the Sierra method. |
|
STEVENSON_ARCE_DITHERING |
[5] Use the Stevenson-Arce method. |
|
JARVIS_DITHERING |
[6] Use the Jarvis method. |
|
ORDERED_DITHERING |
[7] Use ordered dithering, which is faster than other methods but is lower in quality. |
|
CLUSTERED_DITHERING |
[8] Use clustered dithering. |
Returns
SUCCESS |
The function was successful. |
< 0 |
An error occurred. Refer to Return Codes. |
Comments
Some LEADTOOLS functions automatically dither an image when necessary for display. Those functions use the default dithering method that this function specifies.
For general information about dithering, refer to Color Resolution and Dithering.
Required DLLs and Libraries
LTDIS For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
See Also
Functions: |
LBitmapBase::ColorRes, LBitmapSettings::CreateUserMatchTable, LBitmapSettings::SetUserMatchTable, LBitmapSettings::FreeUserMatchTable |
Topics: |
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Raster Image Functions: Working with Color Halftones, Halftones, and Grayscale Images |
Example
L_INT LBitmapSettings__DefaultDitheringExample(HWND hWnd) { L_INT nRet; LBitmapSettings bitmapSettings; LBitmap LeadBitmap; // Set the default dithering nRet =LBitmapSettings::DefaultDithering(NO_DITHERING); if(nRet < 0) return nRet; // Load the bitmap at 8 bits per pixel nRet =LeadBitmap.Load(TEXT("C:\\Program Files\\LEAD Technologies, Inc\\LEADTOOLS 15.0\\Images\\image1.cmp"), 8, ORDER_BGR); if(nRet !=SUCCESS) return nRet; // Update the paint palette SendMessage (hWnd, WM_QUERYNEWPALETTE, 0, 0L); return SUCCESS; }