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

Platforms

Win32, x64, Linux.

See Also

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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