L_SetPaintContrast
#include "l_bitmap.h"
L_LTDIS_API L_INT L_SetPaintContrast(pBitmap, nValue)
pBITMAPHANDLE pBitmap; |
/* pointer to the bitmap handle */ |
L_INT nValue; |
/* amount of contrast change */ |
Sets the contrast value for the specified bitmap. This value can be retrieved using the L_GetPaintContrast function.
Parameter |
Description |
pBitmap |
Pointer to the bitmap handle that references the bitmap to be affected. This cannot be NULL. |
nValue |
Amount of contrast change. Valid values are -1000 to +1000. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
When applying contrast, gamma, and intensity changes to a bitmap, LEAD applies the changes in the following order:
Contrast
Intensity
Gamma
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. |
Platforms
Windows 2000 / XP/Vista, Windows CE.
See Also
Functions: |
L_GetPaintContrast, L_GetPaintGamma, L_SetPaintGamma, L_GetPaintIntensity, L_SetPaintIntensity |
Topics: |
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Example
This example sets the increases the current paint settings by 100 and then forces a repaint.
L_INT SetPaintContrastExample(pBITMAPHANDLE pBitmap) { L_INT nRet; L_INT nContrast; L_UINT uGamma; L_INT nIntensity; /* Get the values */ nContrast = L_GetPaintContrast (pBitmap); uGamma = L_GetPaintGamma (pBitmap); nIntensity = L_GetPaintIntensity (pBitmap); /* Set the new values */ nRet = L_SetPaintContrast (pBitmap, nContrast + 100); if(nRet != SUCCESS) return nRet; nRet = L_SetPaintGamma (pBitmap, uGamma + 100); if(nRet != SUCCESS) return nRet; nRet = L_SetPaintIntensity (pBitmap, nIntensity + 100); if(nRet != SUCCESS) return nRet; return SUCCESS; }