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L_SetPaintContrast

#include "l_bitmap.h"

L_LTDIS_API L_INT L_SetPaintContrast(pBitmap, nValue)

Sets the contrast value for the specified bitmap. This value can be retrieved using the L_GetPaintContrast function.

Parameters

pBITMAPHANDLE pBitmap

Pointer to the bitmap handle that references the bitmap to be affected. This cannot be NULL.

L_INT nValue

Amount of contrast change. Valid values are -1000 to +1000.

Returns

Value	Meaning
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

Win32, x64, Linux.

Functions

Topics

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; 
}

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