Sets the contrast value for the specified bitmap. This value can be retrieved using the L_GetPaintContrast function.
#include "l_bitmap.h"
L_LTDIS_API L_INT L_SetPaintContrast(pBitmap, nValue)
Pointer to the bitmap handle that references the bitmap to be affected. This cannot be NULL.
Amount of contrast change. Valid values are -1000 to +1000.
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes. |
When applying contrast, gamma, and intensity changes to a bitmap, LEAD applies the changes in the following order:
Contrast
Intensity
Gamma
Win32, x64, Linux.
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;
return L_SetPaintIntensity(pBitmap, nIntensity + 100);
}
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